[331] | 1 | /* -*- c++ -*- |
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| 2 | * File : vci_cc_vcache_wrapper.cpp |
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| 3 | * Copyright (c) UPMC, Lip6, SoC |
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| 4 | * Authors : Alain GREINER, Yang GAO |
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| 5 | * |
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| 6 | * SOCLIB_LGPL_HEADER_BEGIN |
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| 7 | * |
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| 8 | * This file is part of SoCLib, GNU LGPLv2.1. |
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| 9 | * |
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| 10 | * SoCLib is free software; you can redistribute it and/or modify it |
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| 11 | * under the terms of the GNU Lesser General Public License as published |
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| 12 | * by the Free Software Foundation; version 2.1 of the License. |
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| 13 | * |
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| 14 | * SoCLib is distributed in the hope that it will be useful, but |
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| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 17 | * Lesser General Public License for more details. |
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| 18 | * |
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| 19 | * You should have received a copy of the GNU Lesser General Public |
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| 20 | * License along with SoCLib; if not, write to the Free Software |
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| 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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| 22 | * 02110-1301 USA |
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| 23 | * |
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| 24 | * SOCLIB_LGPL_HEADER_END |
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| 25 | * |
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| 26 | * Maintainers: cesar.fuguet-tortolero@lip6.fr |
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| 27 | * alexandre.joannou@lip6.fr |
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| 28 | */ |
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| 29 | |
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| 30 | #include <cassert> |
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| 31 | #include "arithmetics.h" |
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[351] | 32 | #include "../include/vci_cc_vcache_wrapper.h" |
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[331] | 33 | |
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| 34 | #define DEBUG_DCACHE 1 |
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| 35 | #define DEBUG_ICACHE 1 |
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[355] | 36 | #define DEBUG_CLEANUP 1 |
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[331] | 37 | |
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| 38 | namespace soclib { |
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| 39 | namespace caba { |
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| 40 | |
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| 41 | namespace { |
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| 42 | const char *icache_fsm_state_str[] = { |
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| 43 | "ICACHE_IDLE", |
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| 44 | |
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| 45 | "ICACHE_XTN_TLB_FLUSH", |
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| 46 | "ICACHE_XTN_CACHE_FLUSH", |
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| 47 | "ICACHE_XTN_CACHE_FLUSH_GO", |
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| 48 | "ICACHE_XTN_TLB_INVAL", |
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| 49 | "ICACHE_XTN_CACHE_INVAL_VA", |
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| 50 | "ICACHE_XTN_CACHE_INVAL_PA", |
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| 51 | "ICACHE_XTN_CACHE_INVAL_GO", |
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| 52 | |
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| 53 | "ICACHE_TLB_WAIT", |
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| 54 | |
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| 55 | "ICACHE_MISS_SELECT", |
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| 56 | "ICACHE_MISS_CLEAN", |
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| 57 | "ICACHE_MISS_WAIT", |
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| 58 | "ICACHE_MISS_DATA_UPDT", |
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| 59 | "ICACHE_MISS_DIR_UPDT", |
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| 60 | |
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| 61 | "ICACHE_UNC_WAIT", |
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| 62 | |
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| 63 | "ICACHE_CC_CHECK", |
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| 64 | "ICACHE_CC_INVAL", |
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| 65 | "ICACHE_CC_UPDT", |
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| 66 | "ICACHE_CC_BROADCAST", |
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| 67 | "ICACHE_CC_SEND_WAIT", |
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| 68 | }; |
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| 69 | |
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| 70 | const char *dcache_fsm_state_str[] = { |
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| 71 | "DCACHE_IDLE", |
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| 72 | |
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| 73 | "DCACHE_TLB_MISS", |
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| 74 | "DCACHE_TLB_PTE1_GET", |
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| 75 | "DCACHE_TLB_PTE1_SELECT", |
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| 76 | "DCACHE_TLB_PTE1_UPDT", |
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| 77 | "DCACHE_TLB_PTE2_GET", |
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| 78 | "DCACHE_TLB_PTE2_SELECT", |
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| 79 | "DCACHE_TLB_PTE2_UPDT", |
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| 80 | "DCACHE_TLB_LR_UPDT", |
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| 81 | "DCACHE_TLB_LR_WAIT", |
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| 82 | "DCACHE_TLB_RETURN", |
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| 83 | |
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| 84 | "DCACHE_XTN_SWITCH", |
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| 85 | "DCACHE_XTN_SYNC", |
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| 86 | "DCACHE_XTN_IC_INVAL_VA", |
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| 87 | "DCACHE_XTN_IC_FLUSH", |
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| 88 | "DCACHE_XTN_IC_INVAL_PA", |
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| 89 | "DCACHE_XTN_IT_INVAL", |
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| 90 | "DCACHE_XTN_DC_FLUSH", |
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| 91 | "DCACHE_XTN_DC_FLUSH_GO", |
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| 92 | "DCACHE_XTN_DC_INVAL_VA", |
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| 93 | "DCACHE_XTN_DC_INVAL_PA", |
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| 94 | "DCACHE_XTN_DC_INVAL_END", |
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| 95 | "DCACHE_XTN_DC_INVAL_GO", |
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| 96 | "DCACHE_XTN_DT_INVAL", |
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| 97 | |
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| 98 | "DCACHE_DIRTY_PTE_GET", |
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| 99 | "DCACHE_DIRTY_WAIT", |
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| 100 | |
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| 101 | "DCACHE_MISS_SELECT", |
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| 102 | "DCACHE_MISS_CLEAN", |
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| 103 | "DCACHE_MISS_WAIT", |
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| 104 | "DCACHE_MISS_DATA_UPDT", |
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| 105 | "DCACHE_MISS_DIR_UPDT", |
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| 106 | |
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| 107 | "DCACHE_UNC_WAIT", |
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| 108 | "DCACHE_LL_WAIT", |
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| 109 | "DCACHE_SC_WAIT", |
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| 110 | |
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| 111 | "DCACHE_CC_CHECK", |
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| 112 | "DCACHE_CC_INVAL", |
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| 113 | "DCACHE_CC_UPDT", |
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| 114 | "DCACHE_CC_BROADCAST", |
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| 115 | "DCACHE_CC_SEND_WAIT", |
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| 116 | |
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| 117 | "DCACHE_INVAL_TLB_SCAN", |
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| 118 | }; |
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| 119 | |
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| 120 | const char *cmd_fsm_state_str[] = { |
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| 121 | "CMD_IDLE", |
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| 122 | "CMD_INS_MISS", |
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| 123 | "CMD_INS_UNC", |
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| 124 | "CMD_DATA_MISS", |
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| 125 | "CMD_DATA_UNC", |
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| 126 | "CMD_DATA_WRITE", |
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| 127 | "CMD_DATA_LL", |
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| 128 | "CMD_DATA_SC", |
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| 129 | "CMD_DATA_CAS", |
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| 130 | }; |
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| 131 | |
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| 132 | const char *rsp_fsm_state_str[] = { |
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| 133 | "RSP_IDLE", |
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| 134 | "RSP_INS_MISS", |
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| 135 | "RSP_INS_UNC", |
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| 136 | "RSP_DATA_MISS", |
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| 137 | "RSP_DATA_UNC", |
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| 138 | "RSP_DATA_LL", |
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| 139 | "RSP_DATA_WRITE", |
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| 140 | }; |
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| 141 | |
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| 142 | const char *cc_receive_fsm_state_str[] = { |
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| 143 | "CC_RECEIVE_IDLE", |
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| 144 | "CC_RECEIVE_CLACK", |
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| 145 | "CC_RECEIVE_BRDCAST_HEADER", |
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| 146 | "CC_RECEIVE_BRDCAST_NLINE", |
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| 147 | "CC_RECEIVE_INVAL_HEADER", |
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| 148 | "CC_RECEIVE_INVAL_NLINE", |
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| 149 | "CC_RECEIVE_UPDT_HEADER", |
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| 150 | "CC_RECEIVE_UPDT_NLINE", |
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| 151 | "CC_RECEIVE_UPDT_DATA", |
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| 152 | }; |
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| 153 | |
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| 154 | const char *cc_send_fsm_state_str[] = { |
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| 155 | "CC_SEND_IDLE", |
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| 156 | "CC_SEND_CLEANUP_1", |
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| 157 | "CC_SEND_CLEANUP_2", |
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| 158 | "CC_SEND_MULTI_ACK", |
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| 159 | }; |
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| 160 | } |
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| 161 | |
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| 162 | #define tmpl(...) template<typename vci_param, typename iss_t> __VA_ARGS__ VciCcVCacheWrapper<vci_param, iss_t> |
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| 163 | |
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[346] | 164 | using namespace soclib::common; |
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[331] | 165 | |
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| 166 | ///////////////////////////////// |
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| 167 | tmpl(/**/)::VciCcVCacheWrapper( |
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| 168 | sc_module_name name, |
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[346] | 169 | const int proc_id, |
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| 170 | const MappingTable &mtd, |
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| 171 | const IntTab &srcid, |
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| 172 | const size_t cc_global_id, |
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| 173 | const size_t itlb_ways, |
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| 174 | const size_t itlb_sets, |
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| 175 | const size_t dtlb_ways, |
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| 176 | const size_t dtlb_sets, |
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| 177 | const size_t icache_ways, |
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| 178 | const size_t icache_sets, |
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| 179 | const size_t icache_words, |
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| 180 | const size_t dcache_ways, |
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| 181 | const size_t dcache_sets, |
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| 182 | const size_t dcache_words, |
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| 183 | const size_t wbuf_nlines, |
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| 184 | const size_t wbuf_nwords, |
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| 185 | const size_t x_width, |
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| 186 | const size_t y_width, |
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| 187 | const uint32_t max_frozen_cycles, |
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| 188 | const uint32_t debug_start_cycle, |
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| 189 | const bool debug_ok ) |
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[331] | 190 | : soclib::caba::BaseModule(name), |
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| 191 | |
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[346] | 192 | p_clk("p_clk"), |
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| 193 | p_resetn("p_resetn"), |
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| 194 | p_vci("p_vci"), |
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| 195 | p_dspin_in("p_dspin_in"), |
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| 196 | p_dspin_out("p_dspin_out"), |
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[331] | 197 | |
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[346] | 198 | m_cacheability_table( mtd.getCacheabilityTable() ), |
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| 199 | m_srcid( mtd.indexForId(srcid) ), |
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| 200 | m_cc_global_id( cc_global_id ), |
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| 201 | m_nline_width( vci_param::N - (uint32_log2(dcache_words)) - 2 ), |
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| 202 | m_itlb_ways( itlb_ways ), |
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| 203 | m_itlb_sets( itlb_sets ), |
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| 204 | m_dtlb_ways( dtlb_ways ), |
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| 205 | m_dtlb_sets( dtlb_sets ), |
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| 206 | m_icache_ways( icache_ways ), |
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| 207 | m_icache_sets( icache_sets ), |
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| 208 | m_icache_yzmask( (~0)<<(uint32_log2(icache_words) + 2) ), |
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| 209 | m_icache_words( icache_words ), |
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| 210 | m_dcache_ways( dcache_ways ), |
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| 211 | m_dcache_sets( dcache_sets ), |
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| 212 | m_dcache_yzmask( (~0)<<(uint32_log2(dcache_words) + 2) ), |
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| 213 | m_dcache_words( dcache_words ), |
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| 214 | m_x_width( x_width ), |
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| 215 | m_y_width( y_width ), |
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| 216 | m_proc_id( proc_id ), |
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| 217 | m_max_frozen_cycles( max_frozen_cycles ), |
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| 218 | m_paddr_nbits( vci_param::N ), |
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| 219 | m_debug_start_cycle( debug_start_cycle ), |
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| 220 | m_debug_ok( debug_ok ), |
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[331] | 221 | |
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| 222 | r_mmu_ptpr("r_mmu_ptpr"), |
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| 223 | r_mmu_mode("r_mmu_mode"), |
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| 224 | r_mmu_word_lo("r_mmu_word_lo"), |
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| 225 | r_mmu_word_hi("r_mmu_word_hi"), |
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| 226 | r_mmu_ibvar("r_mmu_ibvar"), |
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| 227 | r_mmu_dbvar("r_mmu_dbvar"), |
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| 228 | r_mmu_ietr("r_mmu_ietr"), |
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| 229 | r_mmu_detr("r_mmu_detr"), |
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| 230 | |
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| 231 | r_icache_fsm("r_icache_fsm"), |
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| 232 | r_icache_fsm_save("r_icache_fsm_save"), |
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| 233 | r_icache_vci_paddr("r_icache_vci_paddr"), |
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| 234 | r_icache_vaddr_save("r_icache_vaddr_save"), |
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| 235 | |
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| 236 | r_icache_miss_way("r_icache_miss_way"), |
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| 237 | r_icache_miss_set("r_icache_miss_set"), |
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| 238 | r_icache_miss_word("r_icache_miss_word"), |
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| 239 | r_icache_miss_inval("r_icache_miss_inval"), |
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| 240 | r_icache_miss_clack("r_icache_miss_clack"), |
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| 241 | |
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| 242 | r_icache_cc_way("r_icache_cc_way"), |
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| 243 | r_icache_cc_set("r_icache_cc_set"), |
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| 244 | r_icache_cc_word("r_icache_cc_word"), |
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| 245 | r_icache_cc_need_write("r_icache_cc_need_write"), |
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| 246 | |
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| 247 | r_icache_flush_count("r_icache_flush_count"), |
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| 248 | |
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| 249 | r_icache_miss_req("r_icache_miss_req"), |
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| 250 | r_icache_unc_req("r_icache_unc_req"), |
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| 251 | |
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| 252 | r_icache_tlb_miss_req("r_icache_tlb_read_req"), |
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| 253 | r_icache_tlb_rsp_error("r_icache_tlb_rsp_error"), |
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| 254 | |
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| 255 | r_icache_cc_send_req("r_icache_cc_send_req"), |
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| 256 | r_icache_cc_send_type("r_icache_cc_send_type"), |
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| 257 | r_icache_cc_send_nline("r_icache_cc_send_nline"), |
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| 258 | r_icache_cc_send_way("r_icache_cc_send_way"), |
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| 259 | r_icache_cc_send_updt_tab_idx("r_icache_cc_send_updt_tab_idx"), |
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| 260 | |
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| 261 | r_dcache_fsm("r_dcache_fsm"), |
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| 262 | r_dcache_fsm_cc_save("r_dcache_fsm_cc_save"), |
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| 263 | r_dcache_fsm_scan_save("r_dcache_fsm_scan_save"), |
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| 264 | |
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| 265 | r_dcache_wbuf_req("r_dcache_wbuf_req"), |
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| 266 | r_dcache_updt_req("r_dcache_updt_req"), |
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| 267 | r_dcache_save_vaddr("r_dcache_save_vaddr"), |
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| 268 | r_dcache_save_wdata("r_dcache_save_wdata"), |
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| 269 | r_dcache_save_be("r_dcache_save_be"), |
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| 270 | r_dcache_save_paddr("r_dcache_save_paddr"), |
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| 271 | r_dcache_save_cacheable("r_dcache_save_cacheable"), |
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| 272 | r_dcache_save_cache_way("r_dcache_save_cache_way"), |
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| 273 | r_dcache_save_cache_set("r_dcache_save_cache_set"), |
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| 274 | r_dcache_save_cache_word("r_dcache_save_cache_word"), |
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| 275 | |
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| 276 | r_dcache_dirty_paddr("r_dcache_dirty_paddr"), |
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| 277 | r_dcache_dirty_way("r_dcache_dirty_way"), |
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| 278 | r_dcache_dirty_set("r_dcache_dirty_set"), |
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| 279 | |
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| 280 | r_dcache_vci_paddr("r_dcache_vci_paddr"), |
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| 281 | r_dcache_vci_miss_req("r_dcache_vci_miss_req"), |
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| 282 | r_dcache_vci_unc_req("r_dcache_vci_unc_req"), |
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| 283 | r_dcache_vci_unc_be("r_dcache_vci_unc_be"), |
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| 284 | r_dcache_vci_cas_req("r_dcache_vci_cas_req"), |
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| 285 | r_dcache_vci_cas_old("r_dcache_vci_cas_old"), |
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| 286 | r_dcache_vci_cas_new("r_dcache_vci_cas_new"), |
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| 287 | r_dcache_vci_ll_req("r_dcache_vci_ll_req"), |
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| 288 | r_dcache_vci_sc_req("r_dcache_vci_sc_req"), |
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| 289 | r_dcache_vci_sc_data("r_dcache_vci_sc_data"), |
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| 290 | |
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| 291 | r_dcache_xtn_way("r_dcache_xtn_way"), |
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| 292 | r_dcache_xtn_set("r_dcache_xtn_set"), |
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| 293 | |
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| 294 | r_dcache_pending_unc_write("r_dcache_pending_unc_write"), |
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| 295 | |
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| 296 | r_dcache_miss_type("r_dcache_miss_type"), |
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| 297 | r_dcache_miss_word("r_dcache_miss_word"), |
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| 298 | r_dcache_miss_way("r_dcache_miss_way"), |
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| 299 | r_dcache_miss_set("r_dcache_miss_set"), |
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| 300 | r_dcache_miss_inval("r_dcache_miss_inval"), |
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| 301 | |
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| 302 | r_dcache_cc_way("r_dcache_cc_way"), |
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| 303 | r_dcache_cc_set("r_dcache_cc_set"), |
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| 304 | r_dcache_cc_word("r_dcache_cc_word"), |
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| 305 | r_dcache_cc_need_write("r_dcache_cc_need_write"), |
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| 306 | |
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| 307 | r_dcache_flush_count("r_dcache_flush_count"), |
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| 308 | |
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| 309 | r_dcache_ll_rsp_count("r_dcache_ll_rsp_count"), |
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| 310 | |
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| 311 | r_dcache_tlb_vaddr("r_dcache_tlb_vaddr"), |
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| 312 | r_dcache_tlb_ins("r_dcache_tlb_ins"), |
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| 313 | r_dcache_tlb_pte_flags("r_dcache_tlb_pte_flags"), |
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| 314 | r_dcache_tlb_pte_ppn("r_dcache_tlb_pte_ppn"), |
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| 315 | r_dcache_tlb_cache_way("r_dcache_tlb_cache_way"), |
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| 316 | r_dcache_tlb_cache_set("r_dcache_tlb_cache_set"), |
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| 317 | r_dcache_tlb_cache_word("r_dcache_tlb_cache_word"), |
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| 318 | r_dcache_tlb_way("r_dcache_tlb_way"), |
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| 319 | r_dcache_tlb_set("r_dcache_tlb_set"), |
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| 320 | |
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| 321 | r_dcache_tlb_inval_line("r_dcache_tlb_inval_line"), |
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| 322 | r_dcache_tlb_inval_set("r_dcache_tlb_inval_set"), |
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| 323 | |
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| 324 | r_dcache_xtn_req("r_dcache_xtn_req"), |
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| 325 | r_dcache_xtn_opcode("r_dcache_xtn_opcode"), |
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| 326 | |
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| 327 | r_dcache_cc_send_req("r_dcache_cc_send_req"), |
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| 328 | r_dcache_cc_send_type("r_dcache_cc_send_type"), |
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| 329 | r_dcache_cc_send_nline("r_dcache_cc_send_nline"), |
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| 330 | r_dcache_cc_send_way("r_dcache_cc_send_way"), |
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| 331 | r_dcache_cc_send_updt_tab_idx("r_dcache_cc_send_updt_tab_idx"), |
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| 332 | |
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| 333 | r_vci_cmd_fsm("r_vci_cmd_fsm"), |
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| 334 | r_vci_cmd_min("r_vci_cmd_min"), |
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| 335 | r_vci_cmd_max("r_vci_cmd_max"), |
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| 336 | r_vci_cmd_cpt("r_vci_cmd_cpt"), |
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| 337 | r_vci_cmd_imiss_prio("r_vci_cmd_imiss_prio"), |
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| 338 | |
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| 339 | r_vci_rsp_fsm("r_vci_rsp_fsm"), |
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| 340 | r_vci_rsp_cpt("r_vci_rsp_cpt"), |
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| 341 | r_vci_rsp_ins_error("r_vci_rsp_ins_error"), |
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| 342 | r_vci_rsp_data_error("r_vci_rsp_data_error"), |
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| 343 | r_vci_rsp_fifo_icache("r_vci_rsp_fifo_icache", 2), // 2 words depth |
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| 344 | r_vci_rsp_fifo_dcache("r_vci_rsp_fifo_dcache", 2), // 2 words depth |
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| 345 | |
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| 346 | r_cc_send_fsm("r_cc_send_fsm"), |
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| 347 | r_cc_send_last_client("r_cc_send_last_client"), |
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| 348 | |
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| 349 | r_cc_receive_fsm("r_cc_receive_fsm"), |
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| 350 | r_cc_receive_data_ins("r_cc_receive_data_ins"), |
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| 351 | r_cc_receive_word_idx("r_cc_receive_word_idx"), |
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| 352 | r_cc_receive_updt_fifo_be("r_cc_receive_updt_fifo_be", 2), // 2 words depth |
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| 353 | r_cc_receive_updt_fifo_data("r_cc_receive_updt_fifo_data", 2), // 2 words depth |
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| 354 | r_cc_receive_updt_fifo_eop("r_cc_receive_updt_fifo_eop", 2), // 2 words depth |
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| 355 | |
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| 356 | r_cc_receive_icache_req("r_cc_receive_icache_req"), |
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| 357 | r_cc_receive_icache_type("r_cc_receive_icache_type"), |
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| 358 | r_cc_receive_icache_way("r_cc_receive_icache_way"), |
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| 359 | r_cc_receive_icache_set("r_cc_receive_icache_set"), |
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| 360 | r_cc_receive_icache_updt_tab_idx("r_cc_receive_icache_updt_tab_idx"), |
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| 361 | r_cc_receive_icache_nline("r_cc_receive_icache_nline"), |
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| 362 | |
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| 363 | r_cc_receive_dcache_req("r_cc_receive_dcache_req"), |
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| 364 | r_cc_receive_dcache_type("r_cc_receive_dcache_type"), |
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| 365 | r_cc_receive_dcache_way("r_cc_receive_dcache_way"), |
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| 366 | r_cc_receive_dcache_set("r_cc_receive_dcache_set"), |
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| 367 | r_cc_receive_dcache_updt_tab_idx("r_cc_receive_dcache_updt_tab_idx"), |
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| 368 | r_cc_receive_dcache_nline("r_cc_receive_dcache_nline"), |
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| 369 | |
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| 370 | r_iss(this->name(), proc_id), |
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| 371 | r_wbuf("wbuf", wbuf_nwords, wbuf_nlines, dcache_words ), |
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| 372 | r_icache("icache", icache_ways, icache_sets, icache_words), |
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| 373 | r_dcache("dcache", dcache_ways, dcache_sets, dcache_words), |
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| 374 | r_itlb("itlb", proc_id, itlb_ways,itlb_sets,vci_param::N), |
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| 375 | r_dtlb("dtlb", proc_id, dtlb_ways,dtlb_sets,vci_param::N) |
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| 376 | { |
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| 377 | assert( ((icache_words*vci_param::B) < (1<<vci_param::K)) and |
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| 378 | "Need more PLEN bits."); |
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| 379 | |
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| 380 | assert( (vci_param::T > 2) and ((1<<(vci_param::T-1)) >= (wbuf_nlines)) and |
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| 381 | "Need more TRDID bits."); |
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| 382 | |
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| 383 | assert( (icache_words == dcache_words) and |
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| 384 | "icache_words and dcache_words parameters must be equal"); |
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| 385 | |
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| 386 | assert( (itlb_sets == dtlb_sets) and |
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| 387 | "itlb_sets and dtlb_sets parameters must be etqual"); |
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| 388 | |
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| 389 | assert( (itlb_ways == dtlb_ways) and |
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| 390 | "itlb_ways and dtlb_ways parameters must be etqual"); |
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| 391 | |
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| 392 | r_mmu_params = (uint32_log2(m_dtlb_ways) << 29) | (uint32_log2(m_dtlb_sets) << 25) | |
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| 393 | (uint32_log2(m_dcache_ways) << 22) | (uint32_log2(m_dcache_sets) << 18) | |
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| 394 | (uint32_log2(m_itlb_ways) << 15) | (uint32_log2(m_itlb_sets) << 11) | |
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| 395 | (uint32_log2(m_icache_ways) << 8) | (uint32_log2(m_icache_sets) << 4) | |
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| 396 | (uint32_log2(m_icache_words<<2)); |
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| 397 | |
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| 398 | r_mmu_release = (uint32_t)(1 << 16) | 0x1; |
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| 399 | |
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| 400 | r_dcache_in_tlb = new bool[dcache_ways*dcache_sets]; |
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| 401 | r_dcache_contains_ptd = new bool[dcache_ways*dcache_sets]; |
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| 402 | |
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| 403 | SC_METHOD(transition); |
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| 404 | dont_initialize(); |
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| 405 | sensitive << p_clk.pos(); |
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| 406 | |
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| 407 | SC_METHOD(genMoore); |
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| 408 | dont_initialize(); |
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| 409 | sensitive << p_clk.neg(); |
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| 410 | |
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| 411 | typename iss_t::CacheInfo cache_info; |
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| 412 | cache_info.has_mmu = true; |
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| 413 | cache_info.icache_line_size = icache_words*sizeof(uint32_t); |
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| 414 | cache_info.icache_assoc = icache_ways; |
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| 415 | cache_info.icache_n_lines = icache_sets; |
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| 416 | cache_info.dcache_line_size = dcache_words*sizeof(uint32_t); |
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| 417 | cache_info.dcache_assoc = dcache_ways; |
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| 418 | cache_info.dcache_n_lines = dcache_sets; |
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| 419 | r_iss.setCacheInfo(cache_info); |
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| 420 | } |
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| 421 | |
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| 422 | ///////////////////////////////////// |
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| 423 | tmpl(/**/)::~VciCcVCacheWrapper() |
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| 424 | ///////////////////////////////////// |
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| 425 | { |
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| 426 | delete [] r_dcache_in_tlb; |
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| 427 | delete [] r_dcache_contains_ptd; |
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| 428 | } |
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| 429 | |
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| 430 | //////////////////////// |
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| 431 | tmpl(void)::print_cpi() |
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| 432 | //////////////////////// |
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| 433 | { |
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| 434 | std::cout << name() << " CPI = " |
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| 435 | << (float)m_cpt_total_cycles/(m_cpt_total_cycles - m_cpt_frz_cycles) << std::endl ; |
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| 436 | } |
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| 437 | |
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| 438 | //////////////////////////////////// |
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| 439 | tmpl(void)::print_trace(size_t mode) |
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| 440 | //////////////////////////////////// |
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| 441 | { |
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| 442 | // b0 : write buffer trace |
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| 443 | // b1 : write buffer verbose |
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| 444 | // b2 : dcache trace |
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| 445 | // b3 : icache trace |
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| 446 | // b4 : dtlb trace |
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| 447 | // b5 : itlb trace |
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| 448 | |
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| 449 | std::cout << std::dec << "PROC " << name() << std::endl; |
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| 450 | |
---|
| 451 | std::cout << " " << m_ireq << std::endl; |
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| 452 | std::cout << " " << m_irsp << std::endl; |
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| 453 | std::cout << " " << m_dreq << std::endl; |
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| 454 | std::cout << " " << m_drsp << std::endl; |
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| 455 | |
---|
| 456 | std::cout << " " << icache_fsm_state_str[r_icache_fsm.read()] |
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| 457 | << " | " << dcache_fsm_state_str[r_dcache_fsm.read()] |
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| 458 | << " | " << cmd_fsm_state_str[r_vci_cmd_fsm.read()] |
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| 459 | << " | " << rsp_fsm_state_str[r_vci_rsp_fsm.read()] |
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| 460 | << " | " << cc_receive_fsm_state_str[r_cc_receive_fsm.read()] |
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| 461 | << " | " << cc_send_fsm_state_str[r_cc_send_fsm.read()]; |
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| 462 | if (r_dcache_updt_req.read() ) std::cout << " | P1_UPDT"; |
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| 463 | if (r_dcache_wbuf_req.read() ) std::cout << " | P1_WBUF"; |
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| 464 | std::cout << std::endl; |
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| 465 | |
---|
| 466 | if(mode & 0x01) |
---|
| 467 | { |
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| 468 | r_wbuf.printTrace((mode>>1)&1); |
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| 469 | } |
---|
| 470 | if(mode & 0x04) |
---|
| 471 | { |
---|
| 472 | std::cout << " Data Cache" << std::endl; |
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| 473 | r_dcache.printTrace(); |
---|
| 474 | } |
---|
| 475 | if(mode & 0x08) |
---|
| 476 | { |
---|
| 477 | std::cout << " Instruction Cache" << std::endl; |
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| 478 | r_icache.printTrace(); |
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| 479 | } |
---|
| 480 | if(mode & 0x10) |
---|
| 481 | { |
---|
| 482 | std::cout << " Data TLB" << std::endl; |
---|
| 483 | r_dtlb.printTrace(); |
---|
| 484 | } |
---|
| 485 | if(mode & 0x20) |
---|
| 486 | { |
---|
| 487 | std::cout << " Instruction TLB" << std::endl; |
---|
| 488 | r_itlb.printTrace(); |
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| 489 | } |
---|
| 490 | } |
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| 491 | |
---|
| 492 | ////////////////////////////////////////// |
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| 493 | tmpl(void)::cache_monitor( paddr_t addr ) |
---|
| 494 | ////////////////////////////////////////// |
---|
| 495 | { |
---|
| 496 | size_t cache_way; |
---|
| 497 | size_t cache_set; |
---|
| 498 | size_t cache_word; |
---|
| 499 | uint32_t cache_rdata; |
---|
| 500 | bool cache_hit = r_dcache.read_neutral( addr, |
---|
| 501 | &cache_rdata, |
---|
| 502 | &cache_way, |
---|
| 503 | &cache_set, |
---|
| 504 | &cache_word ); |
---|
| 505 | bool icache_hit = r_icache.read_neutral( addr, |
---|
| 506 | &cache_rdata, |
---|
| 507 | &cache_way, |
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| 508 | &cache_set, |
---|
| 509 | &cache_word ); |
---|
| 510 | if ( cache_hit != m_debug_previous_hit ) |
---|
| 511 | { |
---|
| 512 | std::cout << "PROC " << name() |
---|
| 513 | << " dcache change at cycle " << std::dec << m_cpt_total_cycles |
---|
| 514 | << " for adresse " << std::hex << addr |
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| 515 | << " / HIT = " << std::dec << cache_hit << std::endl; |
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| 516 | m_debug_previous_hit = cache_hit; |
---|
| 517 | } |
---|
| 518 | if ( icache_hit != m_idebug_previous_hit ) |
---|
| 519 | { |
---|
| 520 | std::cout << "PROC " << name() |
---|
| 521 | << " icache change at cycle " << std::dec << m_cpt_total_cycles |
---|
| 522 | << " for adresse " << std::hex << addr |
---|
| 523 | << " / HIT = " << icache_hit << std::endl; |
---|
| 524 | m_idebug_previous_hit = icache_hit; |
---|
| 525 | } |
---|
| 526 | } |
---|
| 527 | |
---|
| 528 | /* |
---|
| 529 | //////////////////////// |
---|
| 530 | tmpl(void)::print_stats() |
---|
| 531 | //////////////////////// |
---|
| 532 | { |
---|
| 533 | float run_cycles = (float)(m_cpt_total_cycles - m_cpt_frz_cycles); |
---|
| 534 | std::cout << name() << std::endl |
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| 535 | << "- CPI = " << (float)m_cpt_total_cycles/run_cycles << std::endl |
---|
| 536 | << "- READ RATE = " << (float)m_cpt_read/run_cycles << std::endl |
---|
| 537 | << "- WRITE RATE = " << (float)m_cpt_write/run_cycles << std::endl |
---|
| 538 | << "- IMISS_RATE = " << (float)m_cpt_ins_miss/m_cpt_ins_read << std::endl |
---|
| 539 | << "- DMISS RATE = " << (float)m_cpt_data_miss/(m_cpt_read-m_cpt_unc_read) << std::endl |
---|
| 540 | << "- INS MISS COST = " << (float)m_cost_ins_miss_frz/m_cpt_ins_miss << std::endl |
---|
| 541 | << "- DATA MISS COST = " << (float)m_cost_data_miss_frz/m_cpt_data_miss << std::endl |
---|
| 542 | << "- WRITE COST = " << (float)m_cost_write_frz/m_cpt_write << std::endl |
---|
| 543 | << "- UNC COST = " << (float)m_cost_unc_read_frz/m_cpt_unc_read << std::endl |
---|
| 544 | << "- UNCACHED READ RATE = " << (float)m_cpt_unc_read/m_cpt_read << std::endl |
---|
| 545 | << "- CACHED WRITE RATE = " << (float)m_cpt_write_cached/m_cpt_write << std::endl |
---|
| 546 | << "- INS TLB MISS RATE = " << (float)m_cpt_ins_tlb_miss/m_cpt_ins_tlb_read << std::endl |
---|
| 547 | << "- DATA TLB MISS RATE = " << (float)m_cpt_data_tlb_miss/m_cpt_data_tlb_read << std::endl |
---|
| 548 | << "- ITLB MISS COST = " << (float)m_cost_ins_tlb_miss_frz/m_cpt_ins_tlb_miss << std::endl |
---|
| 549 | << "- DTLB MISS COST = " << (float)m_cost_data_tlb_miss_frz/m_cpt_data_tlb_miss << std::endl |
---|
| 550 | << "- ITLB UPDATE ACC COST = " << (float)m_cost_ins_tlb_update_acc_frz/m_cpt_ins_tlb_update_acc << std::endl |
---|
| 551 | << "- DTLB UPDATE ACC COST = " << (float)m_cost_data_tlb_update_acc_frz/m_cpt_data_tlb_update_acc << std::endl |
---|
| 552 | << "- DTLB UPDATE DIRTY COST = " << (float)m_cost_data_tlb_update_dirty_frz/m_cpt_data_tlb_update_dirty << std::endl |
---|
| 553 | << "- ITLB HIT IN DCACHE RATE= " << (float)m_cpt_ins_tlb_hit_dcache/m_cpt_ins_tlb_miss << std::endl |
---|
| 554 | << "- DTLB HIT IN DCACHE RATE= " << (float)m_cpt_data_tlb_hit_dcache/m_cpt_data_tlb_miss << std::endl |
---|
| 555 | << "- DCACHE FROZEN BY ITLB = " << (float)m_cost_ins_tlb_occup_cache_frz/m_cpt_dcache_frz_cycles << std::endl |
---|
| 556 | << "- DCACHE FOR TLB % = " << (float)m_cpt_tlb_occup_dcache/(m_dcache_ways*m_dcache_sets) << std::endl |
---|
| 557 | << "- NB CC BROADCAST = " << m_cpt_cc_broadcast << std::endl |
---|
| 558 | << "- NB CC UPDATE DATA = " << m_cpt_cc_update_data << std::endl |
---|
| 559 | << "- NB CC INVAL DATA = " << m_cpt_cc_inval_data << std::endl |
---|
| 560 | << "- NB CC INVAL INS = " << m_cpt_cc_inval_ins << std::endl |
---|
| 561 | << "- CC BROADCAST COST = " << (float)m_cost_broadcast_frz/m_cpt_cc_broadcast << std::endl |
---|
| 562 | << "- CC UPDATE DATA COST = " << (float)m_cost_updt_data_frz/m_cpt_cc_update_data << std::endl |
---|
| 563 | << "- CC INVAL DATA COST = " << (float)m_cost_inval_data_frz/m_cpt_cc_inval_data << std::endl |
---|
| 564 | << "- CC INVAL INS COST = " << (float)m_cost_inval_ins_frz/m_cpt_cc_inval_ins << std::endl |
---|
| 565 | << "- NB CC CLEANUP DATA = " << m_cpt_cc_cleanup_data << std::endl |
---|
| 566 | << "- NB CC CLEANUP INS = " << m_cpt_cc_cleanup_ins << std::endl |
---|
| 567 | << "- IMISS TRANSACTION = " << (float)m_cost_imiss_transaction/m_cpt_imiss_transaction << std::endl |
---|
| 568 | << "- DMISS TRANSACTION = " << (float)m_cost_dmiss_transaction/m_cpt_dmiss_transaction << std::endl |
---|
| 569 | << "- UNC TRANSACTION = " << (float)m_cost_unc_transaction/m_cpt_unc_transaction << std::endl |
---|
| 570 | << "- WRITE TRANSACTION = " << (float)m_cost_write_transaction/m_cpt_write_transaction << std::endl |
---|
| 571 | << "- WRITE LENGTH = " << (float)m_length_write_transaction/m_cpt_write_transaction << std::endl |
---|
| 572 | << "- ITLB MISS TRANSACTION = " << (float)m_cost_itlbmiss_transaction/m_cpt_itlbmiss_transaction << std::endl |
---|
| 573 | << "- DTLB MISS TRANSACTION = " << (float)m_cost_dtlbmiss_transaction/m_cpt_dtlbmiss_transaction << std::endl; |
---|
| 574 | } |
---|
| 575 | |
---|
| 576 | //////////////////////// |
---|
| 577 | tmpl(void)::clear_stats() |
---|
| 578 | //////////////////////// |
---|
| 579 | { |
---|
| 580 | m_cpt_dcache_data_read = 0; |
---|
| 581 | m_cpt_dcache_data_write = 0; |
---|
| 582 | m_cpt_dcache_dir_read = 0; |
---|
| 583 | m_cpt_dcache_dir_write = 0; |
---|
| 584 | m_cpt_icache_data_read = 0; |
---|
| 585 | m_cpt_icache_data_write = 0; |
---|
| 586 | m_cpt_icache_dir_read = 0; |
---|
| 587 | m_cpt_icache_dir_write = 0; |
---|
| 588 | |
---|
| 589 | m_cpt_frz_cycles = 0; |
---|
| 590 | m_cpt_dcache_frz_cycles = 0; |
---|
| 591 | m_cpt_total_cycles = 0; |
---|
| 592 | |
---|
| 593 | m_cpt_read = 0; |
---|
| 594 | m_cpt_write = 0; |
---|
| 595 | m_cpt_data_miss = 0; |
---|
| 596 | m_cpt_ins_miss = 0; |
---|
| 597 | m_cpt_unc_read = 0; |
---|
| 598 | m_cpt_write_cached = 0; |
---|
| 599 | m_cpt_ins_read = 0; |
---|
| 600 | |
---|
| 601 | m_cost_write_frz = 0; |
---|
| 602 | m_cost_data_miss_frz = 0; |
---|
| 603 | m_cost_unc_read_frz = 0; |
---|
| 604 | m_cost_ins_miss_frz = 0; |
---|
| 605 | |
---|
| 606 | m_cpt_imiss_transaction = 0; |
---|
| 607 | m_cpt_dmiss_transaction = 0; |
---|
| 608 | m_cpt_unc_transaction = 0; |
---|
| 609 | m_cpt_write_transaction = 0; |
---|
| 610 | m_cpt_icache_unc_transaction = 0; |
---|
| 611 | |
---|
| 612 | m_cost_imiss_transaction = 0; |
---|
| 613 | m_cost_dmiss_transaction = 0; |
---|
| 614 | m_cost_unc_transaction = 0; |
---|
| 615 | m_cost_write_transaction = 0; |
---|
| 616 | m_cost_icache_unc_transaction = 0; |
---|
| 617 | m_length_write_transaction = 0; |
---|
| 618 | |
---|
| 619 | m_cpt_ins_tlb_read = 0; |
---|
| 620 | m_cpt_ins_tlb_miss = 0; |
---|
| 621 | m_cpt_ins_tlb_update_acc = 0; |
---|
| 622 | |
---|
| 623 | m_cpt_data_tlb_read = 0; |
---|
| 624 | m_cpt_data_tlb_miss = 0; |
---|
| 625 | m_cpt_data_tlb_update_acc = 0; |
---|
| 626 | m_cpt_data_tlb_update_dirty = 0; |
---|
| 627 | m_cpt_ins_tlb_hit_dcache = 0; |
---|
| 628 | m_cpt_data_tlb_hit_dcache = 0; |
---|
| 629 | m_cpt_ins_tlb_occup_cache = 0; |
---|
| 630 | m_cpt_data_tlb_occup_cache = 0; |
---|
| 631 | |
---|
| 632 | m_cost_ins_tlb_miss_frz = 0; |
---|
| 633 | m_cost_data_tlb_miss_frz = 0; |
---|
| 634 | m_cost_ins_tlb_update_acc_frz = 0; |
---|
| 635 | m_cost_data_tlb_update_acc_frz = 0; |
---|
| 636 | m_cost_data_tlb_update_dirty_frz = 0; |
---|
| 637 | m_cost_ins_tlb_occup_cache_frz = 0; |
---|
| 638 | m_cost_data_tlb_occup_cache_frz = 0; |
---|
| 639 | |
---|
| 640 | m_cpt_itlbmiss_transaction = 0; |
---|
| 641 | m_cpt_itlb_ll_transaction = 0; |
---|
| 642 | m_cpt_itlb_sc_transaction = 0; |
---|
| 643 | m_cpt_dtlbmiss_transaction = 0; |
---|
| 644 | m_cpt_dtlb_ll_transaction = 0; |
---|
| 645 | m_cpt_dtlb_sc_transaction = 0; |
---|
| 646 | m_cpt_dtlb_ll_dirty_transaction = 0; |
---|
| 647 | m_cpt_dtlb_sc_dirty_transaction = 0; |
---|
| 648 | |
---|
| 649 | m_cost_itlbmiss_transaction = 0; |
---|
| 650 | m_cost_itlb_ll_transaction = 0; |
---|
| 651 | m_cost_itlb_sc_transaction = 0; |
---|
| 652 | m_cost_dtlbmiss_transaction = 0; |
---|
| 653 | m_cost_dtlb_ll_transaction = 0; |
---|
| 654 | m_cost_dtlb_sc_transaction = 0; |
---|
| 655 | m_cost_dtlb_ll_dirty_transaction = 0; |
---|
| 656 | m_cost_dtlb_sc_dirty_transaction = 0; |
---|
| 657 | |
---|
| 658 | m_cpt_cc_update_data = 0; |
---|
| 659 | m_cpt_cc_inval_ins = 0; |
---|
| 660 | m_cpt_cc_inval_data = 0; |
---|
| 661 | m_cpt_cc_broadcast = 0; |
---|
| 662 | |
---|
| 663 | m_cost_updt_data_frz = 0; |
---|
| 664 | m_cost_inval_ins_frz = 0; |
---|
| 665 | m_cost_inval_data_frz = 0; |
---|
| 666 | m_cost_broadcast_frz = 0; |
---|
| 667 | |
---|
| 668 | m_cpt_cc_cleanup_data = 0; |
---|
| 669 | m_cpt_cc_cleanup_ins = 0; |
---|
| 670 | } |
---|
| 671 | |
---|
| 672 | */ |
---|
| 673 | |
---|
| 674 | ///////////////////////// |
---|
| 675 | tmpl(void)::transition() |
---|
| 676 | ///////////////////////// |
---|
| 677 | { |
---|
| 678 | #define LLSCLocalTable GenericLLSCLocalTable<8000, 1, paddr_t, vci_trdid_t, vci_data_t> |
---|
| 679 | if ( not p_resetn.read() ) |
---|
| 680 | { |
---|
| 681 | r_iss.reset(); |
---|
| 682 | r_wbuf.reset(); |
---|
| 683 | r_icache.reset(); |
---|
| 684 | r_dcache.reset(); |
---|
| 685 | r_itlb.reset(); |
---|
| 686 | r_dtlb.reset(); |
---|
| 687 | |
---|
| 688 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 689 | r_icache_fsm = ICACHE_IDLE; |
---|
| 690 | r_vci_cmd_fsm = CMD_IDLE; |
---|
| 691 | r_vci_rsp_fsm = RSP_IDLE; |
---|
| 692 | r_cc_receive_fsm = CC_RECEIVE_IDLE; |
---|
| 693 | r_cc_send_fsm = CC_SEND_IDLE; |
---|
| 694 | |
---|
| 695 | // reset dcache directory extension |
---|
| 696 | for (size_t i=0 ; i< m_dcache_ways*m_dcache_sets ; i++) |
---|
| 697 | { |
---|
| 698 | r_dcache_in_tlb[i] = false; |
---|
| 699 | r_dcache_contains_ptd[i] = false; |
---|
| 700 | } |
---|
| 701 | |
---|
| 702 | // Response FIFOs and cleanup buffer |
---|
| 703 | r_vci_rsp_fifo_icache.init(); |
---|
| 704 | r_vci_rsp_fifo_dcache.init(); |
---|
| 705 | |
---|
| 706 | // ICACHE & DCACHE activated |
---|
| 707 | r_mmu_mode = 0x3; |
---|
| 708 | |
---|
| 709 | // No request from ICACHE FSM to CMD FSM |
---|
| 710 | r_icache_miss_req = false; |
---|
| 711 | r_icache_unc_req = false; |
---|
| 712 | |
---|
| 713 | // No request from ICACHE_FSM to DCACHE FSM |
---|
| 714 | r_icache_tlb_miss_req = false; |
---|
| 715 | |
---|
| 716 | // No request from ICACHE_FSM to CC_SEND FSM |
---|
| 717 | r_icache_cc_send_req = false; |
---|
| 718 | |
---|
| 719 | // No pending write in pipeline |
---|
| 720 | r_dcache_wbuf_req = false; |
---|
| 721 | r_dcache_updt_req = false; |
---|
| 722 | |
---|
| 723 | // No request from DCACHE_FSM to CMD_FSM |
---|
| 724 | r_dcache_vci_miss_req = false; |
---|
| 725 | r_dcache_vci_unc_req = false; |
---|
| 726 | r_dcache_vci_cas_req = false; |
---|
| 727 | r_dcache_vci_ll_req = false; |
---|
| 728 | r_dcache_vci_sc_req = false; |
---|
| 729 | |
---|
| 730 | // No uncacheable write pending |
---|
| 731 | r_dcache_pending_unc_write = false; |
---|
| 732 | |
---|
| 733 | // No processor XTN request pending |
---|
| 734 | r_dcache_xtn_req = false; |
---|
| 735 | |
---|
| 736 | // No request from DCACHE FSM to CC_SEND FSM |
---|
| 737 | r_dcache_cc_send_req = false; |
---|
| 738 | |
---|
| 739 | // No request from CC_RECEIVE FSM to ICACHE/DCACHE FSMs |
---|
| 740 | r_cc_receive_icache_req = false; |
---|
| 741 | r_cc_receive_dcache_req = false; |
---|
| 742 | |
---|
| 743 | // last cc_send client was dcache |
---|
| 744 | r_cc_send_last_client = false; |
---|
| 745 | |
---|
| 746 | // No pending cleanup after a replacement |
---|
| 747 | r_icache_miss_clack = false; |
---|
| 748 | r_dcache_miss_clack = false; |
---|
| 749 | |
---|
| 750 | // No signalisation of a coherence request matching a pending miss |
---|
| 751 | r_icache_miss_inval = false; |
---|
| 752 | r_dcache_miss_inval = false; |
---|
| 753 | |
---|
| 754 | // No signalisation of errors |
---|
| 755 | r_vci_rsp_ins_error = false; |
---|
| 756 | r_vci_rsp_data_error = false; |
---|
| 757 | |
---|
| 758 | // Debug variables |
---|
| 759 | m_debug_previous_hit = false; |
---|
| 760 | m_idebug_previous_hit = false; |
---|
| 761 | m_debug_dcache_fsm = false; |
---|
| 762 | m_debug_icache_fsm = false; |
---|
| 763 | |
---|
| 764 | // activity counters |
---|
| 765 | m_cpt_dcache_data_read = 0; |
---|
| 766 | m_cpt_dcache_data_write = 0; |
---|
| 767 | m_cpt_dcache_dir_read = 0; |
---|
| 768 | m_cpt_dcache_dir_write = 0; |
---|
| 769 | m_cpt_icache_data_read = 0; |
---|
| 770 | m_cpt_icache_data_write = 0; |
---|
| 771 | m_cpt_icache_dir_read = 0; |
---|
| 772 | m_cpt_icache_dir_write = 0; |
---|
| 773 | |
---|
| 774 | m_cpt_frz_cycles = 0; |
---|
| 775 | m_cpt_total_cycles = 0; |
---|
| 776 | m_cpt_stop_simulation = 0; |
---|
| 777 | |
---|
| 778 | m_cpt_data_miss = 0; |
---|
| 779 | m_cpt_ins_miss = 0; |
---|
| 780 | m_cpt_unc_read = 0; |
---|
| 781 | m_cpt_write_cached = 0; |
---|
| 782 | m_cpt_ins_read = 0; |
---|
| 783 | |
---|
| 784 | m_cost_write_frz = 0; |
---|
| 785 | m_cost_data_miss_frz = 0; |
---|
| 786 | m_cost_unc_read_frz = 0; |
---|
| 787 | m_cost_ins_miss_frz = 0; |
---|
| 788 | |
---|
| 789 | m_cpt_imiss_transaction = 0; |
---|
| 790 | m_cpt_dmiss_transaction = 0; |
---|
| 791 | m_cpt_unc_transaction = 0; |
---|
| 792 | m_cpt_write_transaction = 0; |
---|
| 793 | m_cpt_icache_unc_transaction = 0; |
---|
| 794 | |
---|
| 795 | m_cost_imiss_transaction = 0; |
---|
| 796 | m_cost_dmiss_transaction = 0; |
---|
| 797 | m_cost_unc_transaction = 0; |
---|
| 798 | m_cost_write_transaction = 0; |
---|
| 799 | m_cost_icache_unc_transaction = 0; |
---|
| 800 | m_length_write_transaction = 0; |
---|
| 801 | |
---|
| 802 | m_cpt_ins_tlb_read = 0; |
---|
| 803 | m_cpt_ins_tlb_miss = 0; |
---|
| 804 | m_cpt_ins_tlb_update_acc = 0; |
---|
| 805 | |
---|
| 806 | m_cpt_data_tlb_read = 0; |
---|
| 807 | m_cpt_data_tlb_miss = 0; |
---|
| 808 | m_cpt_data_tlb_update_acc = 0; |
---|
| 809 | m_cpt_data_tlb_update_dirty = 0; |
---|
| 810 | m_cpt_ins_tlb_hit_dcache = 0; |
---|
| 811 | m_cpt_data_tlb_hit_dcache = 0; |
---|
| 812 | m_cpt_ins_tlb_occup_cache = 0; |
---|
| 813 | m_cpt_data_tlb_occup_cache = 0; |
---|
| 814 | |
---|
| 815 | m_cost_ins_tlb_miss_frz = 0; |
---|
| 816 | m_cost_data_tlb_miss_frz = 0; |
---|
| 817 | m_cost_ins_tlb_update_acc_frz = 0; |
---|
| 818 | m_cost_data_tlb_update_acc_frz = 0; |
---|
| 819 | m_cost_data_tlb_update_dirty_frz = 0; |
---|
| 820 | m_cost_ins_tlb_occup_cache_frz = 0; |
---|
| 821 | m_cost_data_tlb_occup_cache_frz = 0; |
---|
| 822 | |
---|
| 823 | m_cpt_ins_tlb_inval = 0; |
---|
| 824 | m_cpt_data_tlb_inval = 0; |
---|
| 825 | m_cost_ins_tlb_inval_frz = 0; |
---|
| 826 | m_cost_data_tlb_inval_frz = 0; |
---|
| 827 | |
---|
| 828 | m_cpt_cc_broadcast = 0; |
---|
| 829 | |
---|
| 830 | m_cost_updt_data_frz = 0; |
---|
| 831 | m_cost_inval_ins_frz = 0; |
---|
| 832 | m_cost_inval_data_frz = 0; |
---|
| 833 | m_cost_broadcast_frz = 0; |
---|
| 834 | |
---|
| 835 | m_cpt_cc_cleanup_data = 0; |
---|
| 836 | m_cpt_cc_cleanup_ins = 0; |
---|
| 837 | |
---|
| 838 | m_cpt_itlbmiss_transaction = 0; |
---|
| 839 | m_cpt_itlb_ll_transaction = 0; |
---|
| 840 | m_cpt_itlb_sc_transaction = 0; |
---|
| 841 | m_cpt_dtlbmiss_transaction = 0; |
---|
| 842 | m_cpt_dtlb_ll_transaction = 0; |
---|
| 843 | m_cpt_dtlb_sc_transaction = 0; |
---|
| 844 | m_cpt_dtlb_ll_dirty_transaction = 0; |
---|
| 845 | m_cpt_dtlb_sc_dirty_transaction = 0; |
---|
| 846 | |
---|
| 847 | m_cost_itlbmiss_transaction = 0; |
---|
| 848 | m_cost_itlb_ll_transaction = 0; |
---|
| 849 | m_cost_itlb_sc_transaction = 0; |
---|
| 850 | m_cost_dtlbmiss_transaction = 0; |
---|
| 851 | m_cost_dtlb_ll_transaction = 0; |
---|
| 852 | m_cost_dtlb_sc_transaction = 0; |
---|
| 853 | m_cost_dtlb_ll_dirty_transaction = 0; |
---|
| 854 | m_cost_dtlb_sc_dirty_transaction = 0; |
---|
| 855 | /* |
---|
| 856 | m_cpt_dcache_frz_cycles = 0; |
---|
| 857 | m_cpt_read = 0; |
---|
| 858 | m_cpt_write = 0; |
---|
| 859 | m_cpt_cc_update_data = 0; |
---|
| 860 | m_cpt_cc_inval_ins = 0; |
---|
| 861 | m_cpt_cc_inval_data = 0; |
---|
| 862 | */ |
---|
| 863 | |
---|
| 864 | for (uint32_t i=0; i<32 ; ++i) m_cpt_fsm_icache [i] = 0; |
---|
| 865 | for (uint32_t i=0; i<32 ; ++i) m_cpt_fsm_dcache [i] = 0; |
---|
| 866 | for (uint32_t i=0; i<32 ; ++i) m_cpt_fsm_cmd [i] = 0; |
---|
| 867 | for (uint32_t i=0; i<32 ; ++i) m_cpt_fsm_rsp [i] = 0; |
---|
| 868 | |
---|
| 869 | // init the llsc reservation buffer |
---|
| 870 | r_dcache_llsc_valid = false; |
---|
| 871 | |
---|
| 872 | return; |
---|
| 873 | } |
---|
| 874 | |
---|
| 875 | // Response FIFOs default values |
---|
| 876 | bool vci_rsp_fifo_icache_get = false; |
---|
| 877 | bool vci_rsp_fifo_icache_put = false; |
---|
| 878 | uint32_t vci_rsp_fifo_icache_data = 0; |
---|
| 879 | |
---|
| 880 | bool vci_rsp_fifo_dcache_get = false; |
---|
| 881 | bool vci_rsp_fifo_dcache_put = false; |
---|
| 882 | uint32_t vci_rsp_fifo_dcache_data = 0; |
---|
| 883 | |
---|
| 884 | // updt fifo |
---|
| 885 | bool cc_receive_updt_fifo_get = false; |
---|
| 886 | bool cc_receive_updt_fifo_put = false; |
---|
| 887 | uint32_t cc_receive_updt_fifo_be = 0; |
---|
| 888 | uint32_t cc_receive_updt_fifo_data = 0; |
---|
| 889 | bool cc_receive_updt_fifo_eop = false; |
---|
| 890 | |
---|
| 891 | #ifdef INSTRUMENTATION |
---|
| 892 | m_cpt_fsm_dcache [r_dcache_fsm.read() ] ++; |
---|
| 893 | m_cpt_fsm_icache [r_icache_fsm.read() ] ++; |
---|
| 894 | m_cpt_fsm_cmd [r_vci_cmd_fsm.read()] ++; |
---|
| 895 | m_cpt_fsm_rsp [r_vci_rsp_fsm.read()] ++; |
---|
| 896 | m_cpt_fsm_tgt [r_tgt_fsm.read() ] ++; |
---|
| 897 | m_cpt_fsm_cleanup [r_cleanup_cmd_fsm.read()] ++; |
---|
| 898 | #endif |
---|
| 899 | |
---|
| 900 | m_cpt_total_cycles++; |
---|
| 901 | |
---|
| 902 | m_debug_icache_fsm = (m_cpt_total_cycles > m_debug_start_cycle) and m_debug_ok; |
---|
| 903 | m_debug_dcache_fsm = (m_cpt_total_cycles > m_debug_start_cycle) and m_debug_ok; |
---|
| 904 | |
---|
| 905 | ///////////////////////////////////////////////////////////////////// |
---|
| 906 | // Get data and instruction requests from processor |
---|
| 907 | /////////////////////////////////////////////////////////////////////// |
---|
| 908 | |
---|
| 909 | r_iss.getRequests(m_ireq, m_dreq); |
---|
| 910 | |
---|
| 911 | //////////////////////////////////////////////////////////////////////////////////// |
---|
| 912 | // ICACHE_FSM |
---|
| 913 | // |
---|
| 914 | // 1/ Coherence operations |
---|
| 915 | // They are handled as interrupts generated by the CC_RECEIVE FSM. |
---|
| 916 | // - There is a coherence request when r_tgt_icache_req is set. |
---|
| 917 | // They are taken in IDLE, MISS_WAIT, MISS_DIR_UPDT, UNC_WAIT, states. |
---|
| 918 | // - There is a cleanup ack request when r_cleanup_icache_req is set. |
---|
| 919 | // They are taken in IDLE, MISS_SELECT, MISS_CLEAN, MISS_WAIT, |
---|
| 920 | // MISS_DATA_UPDT, MISS_DIR_UPDT and UNC_WAIT states. |
---|
| 921 | // - For both types of requests, actions associated to the pre-empted state |
---|
| 922 | // are not executed. The DCACHE FSM goes to the proper sub-FSM (CC_CHECK |
---|
| 923 | // or CC_CLACK) to execute the requested coherence operation, and returns |
---|
| 924 | // to the pre-empted state. |
---|
| 925 | // |
---|
| 926 | // 2/ Processor requests |
---|
| 927 | // They are taken in IDLE state only. In case of cache miss, or uncacheable |
---|
| 928 | // instruction, the ICACHE FSM request a VCI transaction to CMD FSM, |
---|
| 929 | // using the r_icache_miss_req or r_icache_unc_req flip-flops. These |
---|
| 930 | // flip-flops are reset when the transaction starts. |
---|
| 931 | // - In case of miss the ICACHE FSM goes to the ICACHE_MISS_SELECT state |
---|
| 932 | // to select a slot and possibly request a cleanup transaction to the CC_SEND FSM. |
---|
| 933 | // It goes next to the ICACHE_MISS_WAIT state waiting a response from RSP FSM, |
---|
| 934 | // The availability of the missing cache line is signaled by the response fifo, |
---|
| 935 | // and the cache update is done (one word per cycle) in the ICACHE_MISS_DATA_UPDT |
---|
| 936 | // and ICACHE_MISS_DIR_UPDT states. |
---|
| 937 | // - In case of uncacheable instruction, the ICACHE FSM goes to ICACHE_UNC_WAIT |
---|
| 938 | // to wait the response from the RSP FSM, through the response fifo. |
---|
| 939 | // The missing instruction is directly returned to processor in this state. |
---|
| 940 | // |
---|
| 941 | // 3/ TLB miss |
---|
| 942 | // In case of tlb miss, the ICACHE FSM request to the DCACHE FSM to update the |
---|
| 943 | // ITLB using the r_icache_tlb_miss_req flip-flop and the r_icache_tlb_miss_vaddr |
---|
| 944 | // register, and goes to the ICACHE_TLB_WAIT state. |
---|
| 945 | // The tlb update is entirely done by the DCACHE FSM (who becomes the owner |
---|
| 946 | // of ITLB until the update is completed, and reset r_icache_tlb_miss_req |
---|
| 947 | // to signal the completion. |
---|
| 948 | // |
---|
| 949 | // 4/ XTN requests |
---|
| 950 | // The DCACHE FSM signals XTN processor requests to ICACHE_FSM |
---|
| 951 | // using the r_dcache_xtn_req flip-flop. |
---|
| 952 | // The request opcode and the address to be invalidated are transmitted |
---|
| 953 | // in the r_dcache_xtn_opcode and r_dcache_save_wdata registers respectively. |
---|
| 954 | // The r_dcache_xtn_req flip-flop is reset by the ICACHE_FSM when the operation |
---|
| 955 | // is completed. |
---|
| 956 | // |
---|
| 957 | // 5/ Error Handling |
---|
| 958 | // The r_vci_rsp_ins_error flip-flop is set by the RSP FSM in case of bus error |
---|
| 959 | // in a cache miss or uncacheable read VCI transaction. Nothing is written |
---|
| 960 | // in the response fifo. This flip-flop is reset by the ICACHE-FSM. |
---|
| 961 | //////////////////////////////////////////////////////////////////////////////////////// |
---|
| 962 | |
---|
| 963 | // default value for m_irsp |
---|
| 964 | m_irsp.valid = false; |
---|
| 965 | m_irsp.error = false; |
---|
| 966 | m_irsp.instruction = 0; |
---|
| 967 | |
---|
| 968 | switch( r_icache_fsm.read() ) |
---|
| 969 | { |
---|
| 970 | ///////////////// |
---|
| 971 | case ICACHE_IDLE: // In this state, we handle processor requests, XTN requests, |
---|
| 972 | // and coherence requests with a fixed priority: |
---|
| 973 | // 1/ Coherence requests => ICACHE_CC_CHECK |
---|
| 974 | // 2/ XTN processor requests (from DCACHE FSM) => ICACHE_XTN_* |
---|
| 975 | // 3/ tlb miss => ICACHE_TLB_WAIT |
---|
| 976 | // 4/ cacheable read miss => ICACHE_MISS_SELECT |
---|
| 977 | // 5/ uncacheable read miss => ICACHE_UNC_REQ |
---|
| 978 | { |
---|
| 979 | // coherence interrupt |
---|
| 980 | if ( r_cc_receive_icache_req.read() ) |
---|
| 981 | { |
---|
| 982 | r_icache_fsm = ICACHE_CC_CHECK; |
---|
| 983 | r_icache_fsm_save = r_icache_fsm.read(); |
---|
| 984 | break; |
---|
| 985 | } |
---|
| 986 | |
---|
| 987 | // XTN requests sent by DCACHE FSM |
---|
| 988 | // These request are not executed in this IDLE state, because |
---|
| 989 | // they require access to icache or itlb, that are already accessed |
---|
| 990 | if ( r_dcache_xtn_req.read() ) |
---|
| 991 | { |
---|
| 992 | if ( (int)r_dcache_xtn_opcode.read() == (int)iss_t::XTN_PTPR ) |
---|
| 993 | { |
---|
| 994 | r_icache_fsm = ICACHE_XTN_TLB_FLUSH; |
---|
| 995 | } |
---|
| 996 | else if ( (int)r_dcache_xtn_opcode.read() == (int)iss_t::XTN_ICACHE_FLUSH) |
---|
| 997 | { |
---|
| 998 | r_icache_flush_count = 0; |
---|
| 999 | r_icache_fsm = ICACHE_XTN_CACHE_FLUSH; |
---|
| 1000 | } |
---|
| 1001 | else if ( (int)r_dcache_xtn_opcode.read() == (int)iss_t::XTN_ITLB_INVAL) |
---|
| 1002 | { |
---|
| 1003 | r_icache_fsm = ICACHE_XTN_TLB_INVAL; |
---|
| 1004 | } |
---|
| 1005 | else if ( (int)r_dcache_xtn_opcode.read() == (int)iss_t::XTN_ICACHE_INVAL) |
---|
| 1006 | { |
---|
| 1007 | r_icache_fsm = ICACHE_XTN_CACHE_INVAL_VA; |
---|
| 1008 | } |
---|
| 1009 | else if ( (int)r_dcache_xtn_opcode.read() == (int)iss_t::XTN_MMU_ICACHE_PA_INV) |
---|
| 1010 | { |
---|
| 1011 | if (sizeof(paddr_t) <= 32) |
---|
| 1012 | { |
---|
| 1013 | assert(r_mmu_word_hi.read() == 0 && |
---|
| 1014 | "illegal XTN request in ICACHE: high bits should be 0 for 32bit paddr"); |
---|
| 1015 | r_icache_vci_paddr = (paddr_t)r_mmu_word_lo.read(); |
---|
| 1016 | } |
---|
| 1017 | else |
---|
| 1018 | { |
---|
| 1019 | r_icache_vci_paddr = (paddr_t)r_mmu_word_hi.read() << 32 | |
---|
| 1020 | (paddr_t)r_mmu_word_lo.read(); |
---|
| 1021 | } |
---|
| 1022 | r_icache_fsm = ICACHE_XTN_CACHE_INVAL_PA; |
---|
| 1023 | } |
---|
| 1024 | else |
---|
| 1025 | { |
---|
| 1026 | assert( false and |
---|
| 1027 | "undefined XTN request received by ICACHE FSM"); |
---|
| 1028 | } |
---|
| 1029 | break; |
---|
| 1030 | } // end if xtn_req |
---|
| 1031 | |
---|
| 1032 | // processor request |
---|
| 1033 | if ( m_ireq.valid ) |
---|
| 1034 | { |
---|
| 1035 | bool cacheable; |
---|
| 1036 | paddr_t paddr; |
---|
| 1037 | bool tlb_hit = false; |
---|
| 1038 | pte_info_t tlb_flags; |
---|
| 1039 | size_t tlb_way; |
---|
| 1040 | size_t tlb_set; |
---|
| 1041 | paddr_t tlb_nline; |
---|
| 1042 | uint32_t cache_inst = 0; |
---|
| 1043 | size_t cache_way; |
---|
| 1044 | size_t cache_set; |
---|
| 1045 | size_t cache_word; |
---|
| 1046 | int cache_state = CACHE_SLOT_STATE_EMPTY; |
---|
| 1047 | |
---|
| 1048 | // We register processor request |
---|
| 1049 | r_icache_vaddr_save = m_ireq.addr; |
---|
| 1050 | |
---|
| 1051 | // sytematic itlb access (if activated) |
---|
| 1052 | if ( r_mmu_mode.read() & INS_TLB_MASK ) |
---|
| 1053 | { |
---|
| 1054 | |
---|
| 1055 | #ifdef INSTRUMENTATION |
---|
| 1056 | m_cpt_itlb_read++; |
---|
| 1057 | #endif |
---|
| 1058 | tlb_hit = r_itlb.translate( m_ireq.addr, |
---|
| 1059 | &paddr, |
---|
| 1060 | &tlb_flags, |
---|
| 1061 | &tlb_nline, // unused |
---|
| 1062 | &tlb_way, // unused |
---|
| 1063 | &tlb_set ); // unused |
---|
| 1064 | } |
---|
| 1065 | else |
---|
| 1066 | { |
---|
| 1067 | paddr = (paddr_t)m_ireq.addr; |
---|
| 1068 | } |
---|
| 1069 | |
---|
| 1070 | // systematic icache access (if activated) |
---|
| 1071 | if ( r_mmu_mode.read() & INS_CACHE_MASK ) |
---|
| 1072 | { |
---|
| 1073 | |
---|
| 1074 | |
---|
| 1075 | #ifdef INSTRUMENTATION |
---|
| 1076 | m_cpt_icache_data_read++; |
---|
| 1077 | m_cpt_icache_dir_read++; |
---|
| 1078 | #endif |
---|
| 1079 | r_icache.read( paddr, |
---|
| 1080 | &cache_inst, |
---|
| 1081 | &cache_way, |
---|
| 1082 | &cache_set, |
---|
| 1083 | &cache_word, |
---|
| 1084 | &cache_state ); |
---|
| 1085 | } |
---|
| 1086 | |
---|
| 1087 | // We compute cacheability and check access rights: |
---|
| 1088 | // - If MMU activated : cacheability is defined by the C bit in the PTE, |
---|
| 1089 | // and the access rights are defined by the U and X bits in the PTE. |
---|
| 1090 | // - If MMU not activated : cacheability is defined by the segment table, |
---|
| 1091 | // and there is no access rights checking |
---|
| 1092 | |
---|
| 1093 | if ( not (r_mmu_mode.read() & INS_TLB_MASK) ) // tlb not activated: |
---|
| 1094 | { |
---|
| 1095 | // cacheability |
---|
| 1096 | if ( not (r_mmu_mode.read() & INS_CACHE_MASK) ) cacheable = false; |
---|
| 1097 | else cacheable = m_cacheability_table[m_ireq.addr]; |
---|
| 1098 | } |
---|
| 1099 | else // itlb activated |
---|
| 1100 | { |
---|
| 1101 | if ( tlb_hit ) // ITLB hit |
---|
| 1102 | { |
---|
| 1103 | // cacheability |
---|
| 1104 | if ( not (r_mmu_mode.read() & INS_CACHE_MASK) ) cacheable = false; |
---|
| 1105 | else cacheable = tlb_flags.c; |
---|
| 1106 | |
---|
| 1107 | // access rights checking |
---|
| 1108 | if ( not tlb_flags.u && (m_ireq.mode == iss_t::MODE_USER) ) |
---|
| 1109 | { |
---|
| 1110 | r_mmu_ietr = MMU_READ_PRIVILEGE_VIOLATION; |
---|
| 1111 | r_mmu_ibvar = m_ireq.addr; |
---|
| 1112 | m_irsp.valid = true; |
---|
| 1113 | m_irsp.error = true; |
---|
| 1114 | m_irsp.instruction = 0; |
---|
| 1115 | break; |
---|
| 1116 | } |
---|
| 1117 | else if ( not tlb_flags.x ) |
---|
| 1118 | { |
---|
| 1119 | r_mmu_ietr = MMU_READ_EXEC_VIOLATION; |
---|
| 1120 | r_mmu_ibvar = m_ireq.addr; |
---|
| 1121 | m_irsp.valid = true; |
---|
| 1122 | m_irsp.error = true; |
---|
| 1123 | m_irsp.instruction = 0; |
---|
| 1124 | break; |
---|
| 1125 | } |
---|
| 1126 | } |
---|
| 1127 | else // ITLB miss |
---|
| 1128 | { |
---|
| 1129 | |
---|
| 1130 | #ifdef INSTRUMENTATION |
---|
| 1131 | m_cpt_itlb_miss++; |
---|
| 1132 | #endif |
---|
| 1133 | r_icache_fsm = ICACHE_TLB_WAIT; |
---|
| 1134 | r_icache_tlb_miss_req = true; |
---|
| 1135 | break; |
---|
| 1136 | } |
---|
| 1137 | } // end if itlb activated |
---|
| 1138 | |
---|
| 1139 | // physical address registration |
---|
| 1140 | r_icache_vci_paddr = paddr; |
---|
| 1141 | |
---|
| 1142 | // Finally, we send the response to processor, and compute next state |
---|
| 1143 | if ( cacheable ) |
---|
| 1144 | { |
---|
| 1145 | if (cache_state == CACHE_SLOT_STATE_EMPTY) // cache miss |
---|
| 1146 | { |
---|
| 1147 | |
---|
| 1148 | #ifdef INSTRUMENTATION |
---|
| 1149 | m_cpt_icache_miss++; |
---|
| 1150 | #endif |
---|
| 1151 | // we request a VCI transaction |
---|
| 1152 | r_icache_fsm = ICACHE_MISS_SELECT; |
---|
| 1153 | r_icache_miss_req = true; |
---|
| 1154 | } |
---|
| 1155 | else if (cache_state == CACHE_SLOT_STATE_ZOMBI ) // pending cleanup |
---|
| 1156 | { |
---|
| 1157 | // stalled until cleanup is acknowledged |
---|
| 1158 | r_icache_fsm = ICACHE_IDLE; |
---|
| 1159 | } |
---|
| 1160 | else // cache hit |
---|
| 1161 | { |
---|
| 1162 | |
---|
| 1163 | #ifdef INSTRUMENTATION |
---|
| 1164 | m_cpt_ins_read++; |
---|
| 1165 | #endif |
---|
| 1166 | // return instruction to processor |
---|
| 1167 | m_irsp.valid = true; |
---|
| 1168 | m_irsp.instruction = cache_inst; |
---|
| 1169 | r_icache_fsm = ICACHE_IDLE; |
---|
| 1170 | } |
---|
| 1171 | } |
---|
| 1172 | else // non cacheable read |
---|
| 1173 | { |
---|
| 1174 | r_icache_unc_req = true; |
---|
| 1175 | r_icache_fsm = ICACHE_UNC_WAIT; |
---|
| 1176 | } |
---|
| 1177 | } // end if m_ireq.valid |
---|
| 1178 | break; |
---|
| 1179 | } |
---|
| 1180 | ///////////////////// |
---|
| 1181 | case ICACHE_TLB_WAIT: // Waiting the itlb update by the DCACHE FSM after a tlb miss |
---|
| 1182 | // the itlb is udated by the DCACHE FSM, as well as the |
---|
| 1183 | // r_mmu_ietr and r_mmu_ibvar registers in case of error. |
---|
| 1184 | // the itlb is not accessed by ICACHE FSM until DCACHE FSM |
---|
| 1185 | // reset the r_icache_tlb_miss_req flip-flop |
---|
| 1186 | // external coherence request are accepted in this state. |
---|
| 1187 | { |
---|
| 1188 | // coherence interrupt |
---|
| 1189 | if ( r_cc_receive_icache_req.read() ) |
---|
| 1190 | { |
---|
| 1191 | r_icache_fsm = ICACHE_CC_CHECK; |
---|
| 1192 | r_icache_fsm_save = r_icache_fsm.read(); |
---|
| 1193 | break; |
---|
| 1194 | } |
---|
| 1195 | |
---|
| 1196 | if ( m_ireq.valid ) m_cost_ins_tlb_miss_frz++; |
---|
| 1197 | |
---|
| 1198 | // DCACHE FSM signals response by reseting the request flip-flop |
---|
| 1199 | if ( not r_icache_tlb_miss_req.read() ) |
---|
| 1200 | { |
---|
| 1201 | if ( r_icache_tlb_rsp_error.read() ) // error reported : tlb not updated |
---|
| 1202 | { |
---|
| 1203 | r_icache_tlb_rsp_error = false; |
---|
| 1204 | m_irsp.error = true; |
---|
| 1205 | m_irsp.valid = true; |
---|
| 1206 | r_icache_fsm = ICACHE_IDLE; |
---|
| 1207 | } |
---|
| 1208 | else // tlb updated : return to IDLE state |
---|
| 1209 | { |
---|
| 1210 | r_icache_fsm = ICACHE_IDLE; |
---|
| 1211 | } |
---|
| 1212 | } |
---|
| 1213 | break; |
---|
| 1214 | } |
---|
| 1215 | ////////////////////////// |
---|
| 1216 | case ICACHE_XTN_TLB_FLUSH: // invalidate in one cycle all non global TLB entries |
---|
| 1217 | { |
---|
| 1218 | r_itlb.flush(); |
---|
| 1219 | r_dcache_xtn_req = false; |
---|
| 1220 | r_icache_fsm = ICACHE_IDLE; |
---|
| 1221 | break; |
---|
| 1222 | } |
---|
| 1223 | //////////////////////////// |
---|
| 1224 | case ICACHE_XTN_CACHE_FLUSH: // Invalidate sequencially all cache lines, using |
---|
| 1225 | // r_icache_flush_count as a slot counter, |
---|
| 1226 | // looping in this state until all slots are visited. |
---|
| 1227 | // It can require two cycles per slot: |
---|
| 1228 | // We test here the slot state, and make the actual inval |
---|
| 1229 | // (if line is valid) in ICACHE_XTN_CACHE_FLUSH_GO state. |
---|
| 1230 | // A cleanup request is generated for each valid line |
---|
| 1231 | { |
---|
| 1232 | if ( not r_icache_cc_send_req.read() ) // blocked until previous cc_send request is sent |
---|
| 1233 | { |
---|
| 1234 | int state; |
---|
| 1235 | uint32_t tag; |
---|
| 1236 | size_t way = r_icache_flush_count.read()/m_icache_sets; |
---|
| 1237 | size_t set = r_icache_flush_count.read()%m_icache_sets; |
---|
| 1238 | |
---|
| 1239 | #ifdef INSTRUMENTATION |
---|
| 1240 | m_cpt_icache_dir_read++; |
---|
| 1241 | #endif |
---|
| 1242 | r_icache.read_dir( way, |
---|
| 1243 | set, |
---|
| 1244 | &tag, |
---|
| 1245 | &state ); |
---|
| 1246 | |
---|
| 1247 | if ( state == CACHE_SLOT_STATE_VALID ) // inval required |
---|
| 1248 | { |
---|
| 1249 | // request cleanup |
---|
| 1250 | r_icache_cc_send_req = true; |
---|
| 1251 | r_icache_cc_send_nline = tag * m_icache_sets; |
---|
| 1252 | r_icache_cc_send_way = way; |
---|
| 1253 | r_icache_cc_send_type = CC_TYPE_CLEANUP; |
---|
| 1254 | |
---|
| 1255 | // goes to ICACHE_XTN_CACHE_FLUSH_GO to make inval |
---|
| 1256 | r_icache_miss_way = way; |
---|
| 1257 | r_icache_miss_set = set; |
---|
| 1258 | r_icache_fsm = ICACHE_XTN_CACHE_FLUSH_GO; |
---|
| 1259 | } |
---|
| 1260 | else if ( r_icache_flush_count.read() == |
---|
| 1261 | (m_icache_sets*m_icache_ways - 1) ) // last slot |
---|
| 1262 | { |
---|
| 1263 | r_dcache_xtn_req = false; |
---|
| 1264 | m_drsp.valid = true; |
---|
| 1265 | r_icache_fsm = ICACHE_IDLE; |
---|
| 1266 | } |
---|
| 1267 | |
---|
| 1268 | // saturation counter, to have the same last slot condition |
---|
| 1269 | // in ICACHE_XTN_CACHE_FLUSH and ICACHE_XTN_CACHE_FLUSH_GO states |
---|
| 1270 | if ( r_icache_flush_count.read() < (m_icache_sets*m_icache_ways - 1) ) |
---|
| 1271 | { |
---|
| 1272 | r_icache_flush_count = r_icache_flush_count.read() + 1; |
---|
| 1273 | } |
---|
| 1274 | } |
---|
| 1275 | break; |
---|
| 1276 | } |
---|
| 1277 | /////////////////////////////// |
---|
| 1278 | case ICACHE_XTN_CACHE_FLUSH_GO: // Switch slot state to ZOMBI for an XTN flush |
---|
| 1279 | { |
---|
| 1280 | size_t way = r_icache_miss_way.read(); |
---|
| 1281 | size_t set = r_icache_miss_set.read(); |
---|
| 1282 | |
---|
| 1283 | #ifdef INSTRUMENTATION |
---|
| 1284 | m_cpt_icache_dir_write++; |
---|
| 1285 | #endif |
---|
| 1286 | |
---|
[366] | 1287 | r_icache.write_dir( way, |
---|
[331] | 1288 | set, |
---|
| 1289 | CACHE_SLOT_STATE_ZOMBI ); |
---|
| 1290 | |
---|
| 1291 | if ( r_icache_flush_count.read() == |
---|
| 1292 | (m_icache_sets*m_icache_ways - 1) ) // last slot |
---|
| 1293 | { |
---|
| 1294 | r_dcache_xtn_req = false; |
---|
| 1295 | m_drsp.valid = true; |
---|
| 1296 | r_icache_fsm = ICACHE_IDLE; |
---|
| 1297 | } |
---|
| 1298 | else |
---|
| 1299 | { |
---|
| 1300 | r_icache_fsm = ICACHE_XTN_CACHE_FLUSH; |
---|
| 1301 | } |
---|
| 1302 | break; |
---|
| 1303 | } |
---|
| 1304 | |
---|
| 1305 | ////////////////////////// |
---|
| 1306 | case ICACHE_XTN_TLB_INVAL: // invalidate one TLB entry selected by the virtual address |
---|
| 1307 | // stored in the r_dcache_save_wdata register |
---|
| 1308 | { |
---|
| 1309 | r_itlb.inval(r_dcache_save_wdata.read()); |
---|
| 1310 | r_dcache_xtn_req = false; |
---|
| 1311 | r_icache_fsm = ICACHE_IDLE; |
---|
| 1312 | break; |
---|
| 1313 | } |
---|
| 1314 | /////////////////////////////// |
---|
| 1315 | case ICACHE_XTN_CACHE_INVAL_VA: // Selective cache line invalidate with virtual address |
---|
| 1316 | // requires 3 cycles (in case of hit on itlb and icache). |
---|
| 1317 | // In this state, access TLB to translate virtual address |
---|
| 1318 | // stored in the r_dcache_save_wdata register. |
---|
| 1319 | { |
---|
| 1320 | paddr_t paddr; |
---|
| 1321 | bool hit; |
---|
| 1322 | |
---|
| 1323 | // read physical address in TLB when MMU activated |
---|
| 1324 | if ( r_mmu_mode.read() & INS_TLB_MASK ) // itlb activated |
---|
| 1325 | { |
---|
| 1326 | |
---|
| 1327 | #ifdef INSTRUMENTATION |
---|
| 1328 | m_cpt_itlb_read++; |
---|
| 1329 | #endif |
---|
| 1330 | hit = r_itlb.translate(r_dcache_save_wdata.read(), |
---|
| 1331 | &paddr); |
---|
| 1332 | } |
---|
| 1333 | else // itlb not activated |
---|
| 1334 | { |
---|
| 1335 | paddr = (paddr_t)r_dcache_save_wdata.read(); |
---|
| 1336 | hit = true; |
---|
| 1337 | } |
---|
| 1338 | |
---|
| 1339 | if ( hit ) // continue the selective inval process |
---|
| 1340 | { |
---|
| 1341 | r_icache_vci_paddr = paddr; |
---|
| 1342 | r_icache_fsm = ICACHE_XTN_CACHE_INVAL_PA; |
---|
| 1343 | } |
---|
| 1344 | else // miss : send a request to DCACHE FSM |
---|
| 1345 | { |
---|
| 1346 | |
---|
| 1347 | #ifdef INSTRUMENTATION |
---|
| 1348 | m_cpt_itlb_miss++; |
---|
| 1349 | #endif |
---|
| 1350 | r_icache_tlb_miss_req = true; |
---|
| 1351 | r_icache_vaddr_save = r_dcache_save_wdata.read(); |
---|
| 1352 | r_icache_fsm = ICACHE_TLB_WAIT; |
---|
| 1353 | } |
---|
| 1354 | break; |
---|
| 1355 | } |
---|
| 1356 | /////////////////////////////// |
---|
| 1357 | case ICACHE_XTN_CACHE_INVAL_PA: // selective invalidate cache line with physical address |
---|
| 1358 | // require 2 cycles. In this state, we read directory |
---|
| 1359 | // with address stored in r_icache_vci_paddr register. |
---|
| 1360 | { |
---|
| 1361 | int state; |
---|
| 1362 | size_t way; |
---|
| 1363 | size_t set; |
---|
| 1364 | size_t word; |
---|
| 1365 | |
---|
| 1366 | #ifdef INSTRUMENTATION |
---|
| 1367 | m_cpt_icache_dir_read++; |
---|
| 1368 | #endif |
---|
| 1369 | r_icache.read_dir(r_icache_vci_paddr.read(), |
---|
| 1370 | &state, |
---|
| 1371 | &way, |
---|
| 1372 | &set, |
---|
| 1373 | &word); |
---|
| 1374 | |
---|
| 1375 | if ( state == CACHE_SLOT_STATE_VALID ) // inval to be done |
---|
| 1376 | { |
---|
| 1377 | r_icache_miss_way = way; |
---|
| 1378 | r_icache_miss_set = set; |
---|
| 1379 | r_icache_fsm = ICACHE_XTN_CACHE_INVAL_GO; |
---|
| 1380 | } |
---|
| 1381 | else // miss : acknowlege the XTN request and return |
---|
| 1382 | { |
---|
| 1383 | r_dcache_xtn_req = false; |
---|
| 1384 | r_icache_fsm = ICACHE_IDLE; |
---|
| 1385 | } |
---|
| 1386 | break; |
---|
| 1387 | } |
---|
| 1388 | /////////////////////////////// |
---|
| 1389 | case ICACHE_XTN_CACHE_INVAL_GO: // Switch slot to ZOMBI state for an XTN inval |
---|
| 1390 | { |
---|
| 1391 | if ( not r_icache_cc_send_req.read() ) // blocked until previous cc_send request not sent |
---|
| 1392 | { |
---|
| 1393 | |
---|
| 1394 | #ifdef INSTRUMENTATION |
---|
| 1395 | m_cpt_icache_dir_write++; |
---|
| 1396 | #endif |
---|
[366] | 1397 | r_icache.write_dir( r_icache_miss_way.read(), |
---|
[331] | 1398 | r_icache_miss_set.read(), |
---|
| 1399 | CACHE_SLOT_STATE_ZOMBI ); |
---|
| 1400 | |
---|
| 1401 | // request cleanup |
---|
| 1402 | r_icache_cc_send_req = true; |
---|
| 1403 | r_icache_cc_send_nline = r_icache_vci_paddr.read() / (m_icache_words<<2); |
---|
| 1404 | r_icache_cc_send_way = r_icache_miss_way.read(); |
---|
| 1405 | r_icache_cc_send_type = CC_TYPE_CLEANUP; |
---|
| 1406 | |
---|
| 1407 | // acknowledge the XTN request and return |
---|
| 1408 | r_dcache_xtn_req = false; |
---|
| 1409 | r_icache_fsm = ICACHE_IDLE; |
---|
| 1410 | } |
---|
| 1411 | break; |
---|
| 1412 | } |
---|
| 1413 | //////////////////////// |
---|
| 1414 | case ICACHE_MISS_SELECT: // Try to select a slot in associative set, |
---|
| 1415 | // if previous cleanup has been sent. |
---|
| 1416 | // Waiting in this state if no slot available. |
---|
| 1417 | // Set the r_icache_cleanup_req flip-flop |
---|
| 1418 | // and the r_icache_miss_clack flip-flop, |
---|
| 1419 | // when a cleanup is required |
---|
| 1420 | { |
---|
| 1421 | if (m_ireq.valid) m_cost_ins_miss_frz++; |
---|
| 1422 | |
---|
| 1423 | // coherence interrupt |
---|
| 1424 | if ( r_cc_receive_icache_req.read() ) |
---|
| 1425 | { |
---|
| 1426 | r_icache_fsm = ICACHE_CC_CHECK; |
---|
| 1427 | r_icache_fsm_save = r_icache_fsm.read(); |
---|
| 1428 | break; |
---|
| 1429 | } |
---|
| 1430 | |
---|
| 1431 | if ( not r_icache_cc_send_req.read() ) // wait for previous cc_send request to be sent |
---|
| 1432 | { |
---|
| 1433 | bool found; |
---|
| 1434 | bool cleanup; |
---|
| 1435 | size_t way; |
---|
| 1436 | size_t set; |
---|
| 1437 | paddr_t victim; |
---|
| 1438 | |
---|
| 1439 | #ifdef INSTRUMENTATION |
---|
| 1440 | m_cpt_icache_dir_read++; |
---|
| 1441 | #endif |
---|
| 1442 | r_icache.read_select(r_icache_vci_paddr.read(), |
---|
| 1443 | &victim, |
---|
| 1444 | &way, |
---|
| 1445 | &set, |
---|
| 1446 | &found, |
---|
| 1447 | &cleanup ); |
---|
| 1448 | if ( found ) |
---|
| 1449 | { |
---|
| 1450 | r_icache_miss_way = way; |
---|
| 1451 | r_icache_miss_set = set; |
---|
| 1452 | |
---|
| 1453 | if ( cleanup ) |
---|
| 1454 | { |
---|
| 1455 | r_icache_fsm = ICACHE_MISS_CLEAN; |
---|
| 1456 | r_icache_miss_clack = true; |
---|
| 1457 | // request cleanup |
---|
| 1458 | r_icache_cc_send_req = true; |
---|
| 1459 | r_icache_cc_send_nline = victim; |
---|
| 1460 | r_icache_cc_send_way = way; |
---|
| 1461 | r_icache_cc_send_type = CC_TYPE_CLEANUP; |
---|
| 1462 | } |
---|
| 1463 | else |
---|
| 1464 | { |
---|
| 1465 | r_icache_fsm = ICACHE_MISS_WAIT; |
---|
| 1466 | } |
---|
| 1467 | |
---|
| 1468 | #if DEBUG_ICACHE |
---|
| 1469 | if ( m_debug_dcache_fsm ) |
---|
| 1470 | { |
---|
| 1471 | std::cout << " <PROC " << name() |
---|
| 1472 | << " ICACHE_MISS_SELECT> Select a slot:" << std::dec |
---|
| 1473 | << " / WAY = " << way |
---|
| 1474 | << " / SET = " << set; |
---|
| 1475 | if (cleanup) std::cout << " / VICTIM = " << std::hex << victim << std::endl; |
---|
| 1476 | else std::cout << std::endl; |
---|
| 1477 | } |
---|
| 1478 | #endif |
---|
| 1479 | } |
---|
| 1480 | } |
---|
| 1481 | break; |
---|
| 1482 | } |
---|
| 1483 | /////////////////////// |
---|
| 1484 | case ICACHE_MISS_CLEAN: // switch the slot to zombi state |
---|
| 1485 | { |
---|
| 1486 | if (m_ireq.valid) m_cost_ins_miss_frz++; |
---|
| 1487 | |
---|
| 1488 | #ifdef INSTRUMENTATION |
---|
| 1489 | m_cpt_icache_dir_write++; |
---|
| 1490 | #endif |
---|
[366] | 1491 | r_icache.write_dir( r_icache_miss_way.read(), |
---|
[331] | 1492 | r_icache_miss_set.read(), |
---|
| 1493 | CACHE_SLOT_STATE_ZOMBI); |
---|
| 1494 | #if DEBUG_ICACHE |
---|
| 1495 | if ( m_debug_dcache_fsm ) |
---|
| 1496 | { |
---|
| 1497 | std::cout << " <PROC " << name() |
---|
| 1498 | << " ICACHE_MISS_CLEAN> Switch to ZOMBI state" << std::dec |
---|
| 1499 | << " / WAY = " << r_icache_miss_way.read() |
---|
| 1500 | << " / SET = " << r_icache_miss_set.read() << std::endl; |
---|
| 1501 | } |
---|
| 1502 | #endif |
---|
| 1503 | |
---|
| 1504 | r_icache_fsm = ICACHE_MISS_WAIT; |
---|
| 1505 | break; |
---|
| 1506 | } |
---|
| 1507 | ////////////////////// |
---|
| 1508 | case ICACHE_MISS_WAIT: // waiting response from VCI_RSP FSM |
---|
| 1509 | { |
---|
| 1510 | if (m_ireq.valid) m_cost_ins_miss_frz++; |
---|
| 1511 | |
---|
| 1512 | // coherence interrupt |
---|
| 1513 | if ( r_cc_receive_icache_req.read() ) |
---|
| 1514 | { |
---|
| 1515 | r_icache_fsm = ICACHE_CC_CHECK; |
---|
| 1516 | r_icache_fsm_save = r_icache_fsm.read(); |
---|
| 1517 | break; |
---|
| 1518 | } |
---|
| 1519 | |
---|
| 1520 | if ( r_vci_rsp_ins_error.read() ) // bus error |
---|
| 1521 | { |
---|
| 1522 | r_mmu_ietr = MMU_READ_DATA_ILLEGAL_ACCESS; |
---|
| 1523 | r_mmu_ibvar = r_icache_vaddr_save.read(); |
---|
| 1524 | m_irsp.valid = true; |
---|
| 1525 | m_irsp.error = true; |
---|
| 1526 | r_vci_rsp_ins_error = false; |
---|
| 1527 | r_icache_fsm = ICACHE_IDLE; |
---|
| 1528 | } |
---|
| 1529 | else if ( r_vci_rsp_fifo_icache.rok() ) // response available |
---|
| 1530 | { |
---|
| 1531 | r_icache_miss_word = 0; |
---|
| 1532 | r_icache_fsm = ICACHE_MISS_DATA_UPDT; |
---|
| 1533 | } |
---|
| 1534 | break; |
---|
| 1535 | } |
---|
| 1536 | /////////////////////////// |
---|
| 1537 | case ICACHE_MISS_DATA_UPDT: // update the cache (one word per cycle) |
---|
| 1538 | { |
---|
| 1539 | if ( m_ireq.valid ) m_cost_ins_miss_frz++; |
---|
| 1540 | |
---|
| 1541 | if ( r_vci_rsp_fifo_icache.rok() ) // response available |
---|
| 1542 | { |
---|
| 1543 | |
---|
| 1544 | #ifdef INSTRUMENTATION |
---|
| 1545 | m_cpt_icache_data_write++; |
---|
| 1546 | #endif |
---|
| 1547 | r_icache.write( r_icache_miss_way.read(), |
---|
| 1548 | r_icache_miss_set.read(), |
---|
| 1549 | r_icache_miss_word.read(), |
---|
| 1550 | r_vci_rsp_fifo_icache.read() ); |
---|
| 1551 | #if DEBUG_ICACHE |
---|
| 1552 | if ( m_debug_icache_fsm ) |
---|
| 1553 | { |
---|
| 1554 | std::cout << " <PROC " << name() |
---|
| 1555 | << " ICACHE_MISS_DATA_UPDT> Write one word:" |
---|
| 1556 | << " WDATA = " << r_vci_rsp_fifo_icache.read() |
---|
| 1557 | << " WAY = " << r_icache_miss_way.read() |
---|
| 1558 | << " SET = " << r_icache_miss_set.read() |
---|
| 1559 | << " WORD = " << r_icache_miss_word.read() << std::endl; |
---|
| 1560 | } |
---|
| 1561 | #endif |
---|
| 1562 | vci_rsp_fifo_icache_get = true; |
---|
| 1563 | r_icache_miss_word = r_icache_miss_word.read() + 1; |
---|
| 1564 | |
---|
| 1565 | if ( r_icache_miss_word.read() == m_icache_words-1 ) // last word |
---|
| 1566 | { |
---|
| 1567 | r_icache_fsm = ICACHE_MISS_DIR_UPDT; |
---|
| 1568 | } |
---|
| 1569 | } |
---|
| 1570 | break; |
---|
| 1571 | } |
---|
| 1572 | ////////////////////////// |
---|
| 1573 | case ICACHE_MISS_DIR_UPDT: // Stalled if a victim line has been evicted, |
---|
| 1574 | // and the cleanup ack has not been received, |
---|
| 1575 | // as indicated by r_icache_miss_clack. |
---|
| 1576 | // - If no matching coherence request (r_icache_miss_inval) |
---|
| 1577 | // switch directory slot to VALID state. |
---|
| 1578 | // - If matching coherence request, switch directory slot |
---|
| 1579 | // to ZOMBI state, and send a cleanup request. |
---|
| 1580 | { |
---|
| 1581 | if ( m_ireq.valid ) m_cost_ins_miss_frz++; |
---|
| 1582 | |
---|
| 1583 | // coherence interrupt |
---|
| 1584 | if ( r_cc_receive_icache_req.read() ) |
---|
| 1585 | { |
---|
| 1586 | r_icache_fsm = ICACHE_CC_CHECK; |
---|
| 1587 | r_icache_fsm_save = r_icache_fsm.read(); |
---|
| 1588 | break; |
---|
| 1589 | } |
---|
| 1590 | |
---|
| 1591 | if ( not r_icache_miss_clack.read() ) // waiting cleanup acknowledge for victim line |
---|
| 1592 | { |
---|
| 1593 | if ( r_icache_miss_inval ) // Switch slot to ZOMBI state, and new cleanup |
---|
| 1594 | { |
---|
| 1595 | if ( not r_icache_cc_send_req.read() ) |
---|
| 1596 | { |
---|
| 1597 | r_icache_miss_inval = false; |
---|
| 1598 | // request cleanup |
---|
| 1599 | r_icache_cc_send_req = true; |
---|
| 1600 | r_icache_cc_send_nline = r_icache_vci_paddr.read() / (m_icache_words<<2); |
---|
| 1601 | r_icache_cc_send_way = r_icache_miss_way.read(); |
---|
| 1602 | r_icache_cc_send_type = CC_TYPE_CLEANUP; |
---|
| 1603 | |
---|
| 1604 | #ifdef INSTRUMENTATION |
---|
| 1605 | m_cpt_icache_dir_write++; |
---|
| 1606 | #endif |
---|
| 1607 | r_icache.write_dir( r_icache_vci_paddr.read(), |
---|
| 1608 | r_icache_miss_way.read(), |
---|
| 1609 | r_icache_miss_set.read(), |
---|
| 1610 | CACHE_SLOT_STATE_ZOMBI ); |
---|
| 1611 | #if DEBUG_ICACHE |
---|
| 1612 | if ( m_debug_icache_fsm ) |
---|
| 1613 | { |
---|
| 1614 | std::cout << " <PROC " << name() |
---|
| 1615 | << " ICACHE_MISS_DIR_UPDT> Switch cache slot to ZOMBI state" |
---|
| 1616 | << " PADDR = " << std::hex << r_icache_vci_paddr.read() |
---|
| 1617 | << " WAY = " << std::dec << r_icache_miss_way.read() |
---|
| 1618 | << " SET = " << r_icache_miss_set.read() << std::endl; |
---|
| 1619 | } |
---|
| 1620 | #endif |
---|
| 1621 | } |
---|
| 1622 | else |
---|
| 1623 | break; |
---|
| 1624 | } |
---|
| 1625 | else // Switch slot to VALID state |
---|
| 1626 | { |
---|
| 1627 | |
---|
| 1628 | #ifdef INSTRUMENTATION |
---|
| 1629 | m_cpt_icache_dir_write++; |
---|
| 1630 | #endif |
---|
| 1631 | r_icache.write_dir( r_icache_vci_paddr.read(), |
---|
| 1632 | r_icache_miss_way.read(), |
---|
| 1633 | r_icache_miss_set.read(), |
---|
| 1634 | CACHE_SLOT_STATE_VALID ); |
---|
| 1635 | #if DEBUG_ICACHE |
---|
| 1636 | if ( m_debug_icache_fsm ) |
---|
| 1637 | { |
---|
| 1638 | std::cout << " <PROC " << name() |
---|
| 1639 | << " ICACHE_MISS_DIR_UPDT> Switch cache slot to VALID state" |
---|
| 1640 | << " PADDR = " << std::hex << r_icache_vci_paddr.read() |
---|
| 1641 | << " WAY = " << std::dec << r_icache_miss_way.read() |
---|
| 1642 | << " SET = " << r_icache_miss_set.read() << std::endl; |
---|
| 1643 | } |
---|
| 1644 | #endif |
---|
| 1645 | } |
---|
| 1646 | |
---|
| 1647 | r_icache_fsm = ICACHE_IDLE; |
---|
| 1648 | } |
---|
| 1649 | break; |
---|
| 1650 | } |
---|
| 1651 | //////////////////// |
---|
| 1652 | case ICACHE_UNC_WAIT: // waiting a response to an uncacheable read from VCI_RSP FSM |
---|
| 1653 | { |
---|
| 1654 | // coherence interrupt |
---|
| 1655 | if ( r_cc_receive_icache_req.read() ) |
---|
| 1656 | { |
---|
| 1657 | r_icache_fsm = ICACHE_CC_CHECK; |
---|
| 1658 | r_icache_fsm_save = r_icache_fsm.read(); |
---|
| 1659 | break; |
---|
| 1660 | } |
---|
| 1661 | |
---|
| 1662 | if ( r_vci_rsp_ins_error.read() ) // bus error |
---|
| 1663 | { |
---|
| 1664 | r_mmu_ietr = MMU_READ_DATA_ILLEGAL_ACCESS; |
---|
| 1665 | r_mmu_ibvar = m_ireq.addr; |
---|
| 1666 | r_vci_rsp_ins_error = false; |
---|
| 1667 | m_irsp.valid = true; |
---|
| 1668 | m_irsp.error = true; |
---|
| 1669 | r_icache_fsm = ICACHE_IDLE; |
---|
| 1670 | } |
---|
| 1671 | else if (r_vci_rsp_fifo_icache.rok() ) // instruction available |
---|
| 1672 | { |
---|
| 1673 | vci_rsp_fifo_icache_get = true; |
---|
| 1674 | r_icache_fsm = ICACHE_IDLE; |
---|
| 1675 | if ( m_ireq.valid and |
---|
| 1676 | (m_ireq.addr == r_icache_vaddr_save.read()) ) // request unmodified |
---|
| 1677 | { |
---|
| 1678 | m_irsp.valid = true; |
---|
| 1679 | m_irsp.instruction = r_vci_rsp_fifo_icache.read(); |
---|
| 1680 | } |
---|
| 1681 | } |
---|
| 1682 | break; |
---|
| 1683 | } |
---|
| 1684 | ///////////////////// |
---|
| 1685 | case ICACHE_CC_CHECK: // This state is the entry point of a sub-fsm |
---|
| 1686 | // handling coherence requests. |
---|
| 1687 | // if there is a matching pending miss, it is |
---|
| 1688 | // signaled in the r_icache_miss_inval flip-flop. |
---|
| 1689 | // The return state is defined in r_icache_fsm_save. |
---|
| 1690 | { |
---|
| 1691 | paddr_t paddr = r_cc_receive_icache_nline.read() * m_icache_words * 4; |
---|
| 1692 | paddr_t mask = ~((m_icache_words<<2)-1); |
---|
| 1693 | |
---|
| 1694 | if (r_cc_receive_icache_type.read() == CC_TYPE_CLACK) |
---|
| 1695 | // We switch the directory slot to EMPTY state |
---|
| 1696 | // and reset r_icache_miss_clack if the cleanup ack |
---|
| 1697 | // is matching a pending miss |
---|
| 1698 | { |
---|
| 1699 | |
---|
| 1700 | if ( m_ireq.valid ) m_cost_ins_miss_frz++; |
---|
| 1701 | |
---|
| 1702 | #ifdef INSTRUMENTATION |
---|
| 1703 | m_cpt_icache_dir_write++; |
---|
| 1704 | #endif |
---|
| 1705 | r_icache.write_dir( 0, |
---|
| 1706 | r_cc_receive_icache_way.read(), |
---|
| 1707 | r_cc_receive_icache_set.read(), |
---|
| 1708 | CACHE_SLOT_STATE_EMPTY); |
---|
| 1709 | |
---|
| 1710 | if ( (r_icache_miss_set.read() == r_cc_receive_icache_set.read()) and |
---|
| 1711 | (r_icache_miss_way.read() == r_cc_receive_icache_way.read()) ) |
---|
| 1712 | r_icache_miss_clack = false; |
---|
| 1713 | |
---|
| 1714 | r_icache_fsm = r_icache_fsm_save.read() ; |
---|
| 1715 | r_cc_receive_icache_req = false; |
---|
| 1716 | |
---|
| 1717 | #if DEBUG_ICACHE |
---|
| 1718 | if ( m_debug_icache_fsm ) |
---|
| 1719 | { |
---|
| 1720 | std::cout << " <PROC " << name() |
---|
| 1721 | << " ICACHE_CC_CHECK> CC_TYPE_CLACK slot returns to empty state" |
---|
| 1722 | << " set = " << r_cc_receive_icache_set.read() |
---|
| 1723 | << " / way = " << r_cc_receive_icache_way.read() << std::endl; |
---|
| 1724 | } |
---|
| 1725 | #endif |
---|
| 1726 | } |
---|
[355] | 1727 | else if( ((r_icache_fsm_save.read() == ICACHE_MISS_SELECT) or |
---|
| 1728 | (r_icache_fsm_save.read() == ICACHE_MISS_WAIT) or |
---|
[331] | 1729 | (r_icache_fsm_save.read() == ICACHE_MISS_DIR_UPDT)) and |
---|
| 1730 | ((r_icache_vci_paddr.read() & mask) == (paddr & mask)) ) // matching |
---|
| 1731 | { |
---|
| 1732 | // signaling the matching |
---|
| 1733 | r_icache_miss_inval = true; |
---|
| 1734 | |
---|
| 1735 | // in case of update, go to CC_UPDT |
---|
| 1736 | // JUST TO POP THE FIFO |
---|
| 1737 | if (r_cc_receive_icache_type.read() == CC_TYPE_UPDT) |
---|
| 1738 | { |
---|
| 1739 | r_icache_fsm = ICACHE_CC_UPDT; |
---|
| 1740 | r_icache_cc_word = r_cc_receive_word_idx.read(); |
---|
| 1741 | // just pop the fifo , don't write in icache |
---|
| 1742 | r_icache_cc_need_write = false; |
---|
| 1743 | } |
---|
| 1744 | // the request is dealt with |
---|
| 1745 | else |
---|
| 1746 | { |
---|
| 1747 | r_cc_receive_icache_req = false; |
---|
| 1748 | r_icache_fsm = r_icache_fsm_save.read(); |
---|
| 1749 | } |
---|
| 1750 | #if DEBUG_ICACHE |
---|
| 1751 | if ( m_debug_icache_fsm ) |
---|
| 1752 | { |
---|
| 1753 | std::cout << " <PROC " << name() |
---|
| 1754 | << " ICACHE_CC_CHECK> Coherence request matching a pending miss:" |
---|
| 1755 | << " PADDR = " << std::hex << paddr << std::endl; |
---|
| 1756 | } |
---|
| 1757 | #endif |
---|
| 1758 | } |
---|
| 1759 | else // no match |
---|
| 1760 | { |
---|
| 1761 | int state; |
---|
| 1762 | size_t way; |
---|
| 1763 | size_t set; |
---|
| 1764 | size_t word; |
---|
| 1765 | |
---|
| 1766 | #ifdef INSTRUMENTATION |
---|
| 1767 | m_cpt_icache_dir_read++; |
---|
| 1768 | #endif |
---|
| 1769 | r_icache.read_dir(paddr, |
---|
| 1770 | &state, |
---|
| 1771 | &way, |
---|
| 1772 | &set, |
---|
| 1773 | &word); |
---|
| 1774 | |
---|
| 1775 | r_icache_cc_way = way; |
---|
| 1776 | r_icache_cc_set = set; |
---|
| 1777 | |
---|
| 1778 | if ( state == CACHE_SLOT_STATE_VALID) // hit |
---|
| 1779 | { |
---|
| 1780 | // need to update the cache state |
---|
| 1781 | r_icache_cc_need_write = true; |
---|
| 1782 | if (r_cc_receive_icache_type.read() == CC_TYPE_UPDT) // hit update |
---|
| 1783 | { |
---|
| 1784 | r_icache_fsm = ICACHE_CC_UPDT; |
---|
| 1785 | r_icache_cc_word = r_cc_receive_word_idx.read(); |
---|
| 1786 | } |
---|
| 1787 | else if (r_cc_receive_icache_type.read() == CC_TYPE_INVAL) // hit inval |
---|
| 1788 | { |
---|
| 1789 | r_icache_fsm = ICACHE_CC_INVAL; |
---|
| 1790 | } |
---|
| 1791 | else if (r_cc_receive_icache_type.read() == CC_TYPE_BRDCAST) // hit broadcast |
---|
| 1792 | { |
---|
| 1793 | r_icache_fsm = ICACHE_CC_BROADCAST; |
---|
| 1794 | } |
---|
| 1795 | } |
---|
| 1796 | else // miss |
---|
| 1797 | { |
---|
| 1798 | // multicast acknowledgement required in case of update |
---|
| 1799 | if(r_cc_receive_icache_type.read() == CC_TYPE_UPDT) |
---|
| 1800 | { |
---|
| 1801 | r_icache_fsm = ICACHE_CC_UPDT; |
---|
| 1802 | r_icache_cc_word = r_cc_receive_word_idx.read(); |
---|
| 1803 | // just pop the fifo , don't write in icache |
---|
| 1804 | r_icache_cc_need_write = false; |
---|
| 1805 | } |
---|
| 1806 | else // No response needed |
---|
| 1807 | { |
---|
| 1808 | r_cc_receive_icache_req = false; |
---|
| 1809 | r_icache_fsm = r_icache_fsm_save.read(); |
---|
| 1810 | } |
---|
| 1811 | } |
---|
| 1812 | } |
---|
| 1813 | break; |
---|
| 1814 | } |
---|
| 1815 | ///////////////////// |
---|
| 1816 | case ICACHE_CC_INVAL: // hit inval : switch slot to EMPTY state |
---|
| 1817 | { |
---|
| 1818 | |
---|
| 1819 | #if DEBUG_ICACHE |
---|
| 1820 | if ( m_debug_icache_fsm ) |
---|
| 1821 | { |
---|
| 1822 | std::cout << " <PROC " << name() |
---|
| 1823 | << " ICACHE_CC_INVAL> slot returns to empty state" |
---|
| 1824 | << " set = " << r_icache_cc_set.read() |
---|
| 1825 | << " / way = " << r_icache_cc_way.read() << std::endl; |
---|
| 1826 | } |
---|
| 1827 | #endif |
---|
| 1828 | |
---|
| 1829 | #ifdef INSTRUMENTATION |
---|
| 1830 | m_cpt_icache_dir_read++; |
---|
| 1831 | #endif |
---|
| 1832 | if (r_icache_cc_need_write.read()) |
---|
| 1833 | { |
---|
| 1834 | r_icache.write_dir( 0, |
---|
| 1835 | r_icache_cc_way.read(), |
---|
| 1836 | r_icache_cc_set.read(), |
---|
| 1837 | CACHE_SLOT_STATE_EMPTY ); |
---|
| 1838 | // no need to write in the cache anymore |
---|
| 1839 | r_icache_cc_need_write = false; |
---|
| 1840 | } |
---|
| 1841 | |
---|
| 1842 | // multicast acknowledgement |
---|
| 1843 | // send a request to cc_send_fsm |
---|
| 1844 | if(not r_icache_cc_send_req.read()) // cc_send is available |
---|
| 1845 | { |
---|
| 1846 | // coherence request completed |
---|
| 1847 | r_cc_receive_icache_req = false; |
---|
| 1848 | // request multicast acknowledgement |
---|
| 1849 | r_icache_cc_send_req = true; |
---|
[369] | 1850 | r_icache_cc_send_nline = r_cc_receive_icache_nline.read(); |
---|
[331] | 1851 | r_icache_cc_send_updt_tab_idx = r_cc_receive_icache_updt_tab_idx.read(); |
---|
| 1852 | r_icache_cc_send_type = CC_TYPE_MULTI_ACK; |
---|
| 1853 | |
---|
| 1854 | r_icache_fsm = r_icache_fsm_save.read(); |
---|
| 1855 | } |
---|
| 1856 | //else wait for previous cc_send request to be sent |
---|
| 1857 | break; |
---|
| 1858 | } |
---|
| 1859 | //////////////////// |
---|
| 1860 | case ICACHE_CC_UPDT: // hit update : write one word per cycle |
---|
| 1861 | { |
---|
| 1862 | |
---|
| 1863 | #if DEBUG_ICACHE |
---|
| 1864 | if ( m_debug_icache_fsm ) |
---|
| 1865 | { |
---|
| 1866 | std::cout << " <PROC " << name() |
---|
| 1867 | << " ICACHE_CC_UPDT> Write one word " |
---|
| 1868 | << " set = " << r_icache_cc_set.read() |
---|
| 1869 | << " / way = " << r_icache_cc_way.read() |
---|
| 1870 | << " / word = " << r_icache_cc_word.read() << std::endl; |
---|
| 1871 | } |
---|
| 1872 | #endif |
---|
| 1873 | |
---|
| 1874 | #ifdef INSTRUMENTATION |
---|
| 1875 | m_cpt_icache_data_write++; |
---|
| 1876 | #endif |
---|
| 1877 | size_t word = r_icache_cc_word.read(); |
---|
| 1878 | size_t way = r_icache_cc_way.read(); |
---|
| 1879 | size_t set = r_icache_cc_set.read(); |
---|
| 1880 | |
---|
| 1881 | if (r_cc_receive_updt_fifo_be.rok()) |
---|
| 1882 | { |
---|
| 1883 | if (r_icache_cc_need_write.read()) |
---|
| 1884 | { |
---|
| 1885 | r_icache.write( way, |
---|
| 1886 | set, |
---|
| 1887 | word, |
---|
| 1888 | r_cc_receive_updt_fifo_data.read(), |
---|
| 1889 | r_cc_receive_updt_fifo_be.read() ); |
---|
| 1890 | |
---|
| 1891 | r_icache_cc_word = word+1; |
---|
| 1892 | } |
---|
| 1893 | if ( r_cc_receive_updt_fifo_eop.read() ) // last word |
---|
| 1894 | { |
---|
| 1895 | // no need to write in the cache anymore |
---|
| 1896 | r_icache_cc_need_write = false; |
---|
| 1897 | // wait to send a request to cc_send_fsm |
---|
| 1898 | if(not r_icache_cc_send_req.read()) // cc_send is available |
---|
| 1899 | { |
---|
| 1900 | //consume last flit |
---|
| 1901 | cc_receive_updt_fifo_get = true; |
---|
| 1902 | // coherence request completed |
---|
| 1903 | r_cc_receive_icache_req = false; |
---|
| 1904 | // request multicast acknowledgement |
---|
| 1905 | r_icache_cc_send_req = true; |
---|
[369] | 1906 | r_icache_cc_send_nline = r_cc_receive_icache_nline.read(); |
---|
[331] | 1907 | r_icache_cc_send_updt_tab_idx = r_cc_receive_icache_updt_tab_idx.read(); |
---|
| 1908 | r_icache_cc_send_type = CC_TYPE_MULTI_ACK; |
---|
| 1909 | |
---|
| 1910 | r_icache_fsm = r_icache_fsm_save.read(); |
---|
| 1911 | } |
---|
| 1912 | } |
---|
| 1913 | else |
---|
| 1914 | { |
---|
| 1915 | //consume fifo if not eop |
---|
| 1916 | cc_receive_updt_fifo_get = true; |
---|
| 1917 | } |
---|
| 1918 | } |
---|
| 1919 | break; |
---|
| 1920 | } |
---|
| 1921 | ///////////////////////// |
---|
| 1922 | case ICACHE_CC_BROADCAST: // hit broadcast : switch slot to ZOMBI state |
---|
| 1923 | // and request a cleanup |
---|
| 1924 | { |
---|
| 1925 | |
---|
| 1926 | #if DEBUG_ICACHE |
---|
| 1927 | if ( m_debug_icache_fsm ) |
---|
| 1928 | { |
---|
| 1929 | std::cout << " <PROC " << name() |
---|
| 1930 | << " ICACHE_CC_BROADCAST > Slot goes to zombi state " |
---|
| 1931 | << " set = " << r_icache_cc_set.read() |
---|
| 1932 | << " / way = " << r_icache_cc_way.read() << std::endl; |
---|
| 1933 | } |
---|
| 1934 | #endif |
---|
| 1935 | |
---|
| 1936 | #ifdef INSTRUMENTATION |
---|
| 1937 | m_cpt_icache_dir_write++; |
---|
| 1938 | #endif |
---|
| 1939 | if (r_icache_cc_need_write.read()) |
---|
| 1940 | { |
---|
[366] | 1941 | r_icache.write_dir( r_icache_cc_way.read(), |
---|
[331] | 1942 | r_icache_cc_set.read(), |
---|
| 1943 | CACHE_SLOT_STATE_ZOMBI ); |
---|
| 1944 | // no need to write in the cache anymore |
---|
| 1945 | r_icache_cc_need_write = false; |
---|
| 1946 | } |
---|
| 1947 | |
---|
| 1948 | // cleanup |
---|
| 1949 | // send a request to cc_send_fsm |
---|
| 1950 | if(not r_icache_cc_send_req.read()) // cc_send is available |
---|
| 1951 | { |
---|
| 1952 | // coherence request completed |
---|
| 1953 | r_cc_receive_icache_req = false; |
---|
| 1954 | // request cleanup |
---|
| 1955 | r_icache_cc_send_req = true; |
---|
| 1956 | r_icache_cc_send_nline = r_cc_receive_icache_nline.read(); |
---|
| 1957 | r_icache_cc_send_way = r_icache_cc_way.read(); |
---|
| 1958 | r_icache_cc_send_type = CC_TYPE_CLEANUP; |
---|
| 1959 | |
---|
| 1960 | r_icache_fsm = r_icache_fsm_save.read(); |
---|
| 1961 | } |
---|
| 1962 | //else wait for previous cc_send request to be sent |
---|
| 1963 | break; |
---|
| 1964 | } |
---|
| 1965 | } // end switch r_icache_fsm |
---|
| 1966 | |
---|
| 1967 | //////////////////////////////////////////////////////////////////////////////////// |
---|
| 1968 | // DCACHE FSM |
---|
| 1969 | // |
---|
| 1970 | // 1/ Coherence operations |
---|
| 1971 | // They are handled as interrupts generated by the CC_RECEIVE FSM. |
---|
| 1972 | // - There is a coherence request when r_tgt_dcache_req is set. |
---|
| 1973 | // They are taken in IDLE, MISS_WAIT, MISS_DIR_UPDT, UNC_WAIT, LL_WAIT |
---|
| 1974 | // and SC_WAIT states. |
---|
| 1975 | // - There is a cleanup acknowledge request when r_cleanup_dcache_req is set. |
---|
| 1976 | // They are taken in IDLE, MISS_SELECT, MISS_CLEAN, MISS_WAIT, MISS_DATA_UPDT, |
---|
| 1977 | // MISS_DIR_UPDT, UNC_WAIT, LL_WAIT, SC_WAIT states. |
---|
| 1978 | // - For both types of requests, actions associated to the pre-empted state |
---|
| 1979 | // are not executed. The DCACHE FSM goes to the proper sub-FSM (CC_CHECK |
---|
| 1980 | // or CC_CLACK) to execute the requested coherence operation, and returns |
---|
| 1981 | // to the pre-empted state. |
---|
| 1982 | // |
---|
| 1983 | // 2/ TLB miss |
---|
| 1984 | // The page tables are generally cacheable. |
---|
| 1985 | // In case of miss in itlb or dtlb, the tlb miss is handled by a dedicated |
---|
| 1986 | // sub-fsm (DCACHE_TLB_MISS state), that handle possible miss in DCACHE, |
---|
| 1987 | // this sub-fsm implement the table-walk... |
---|
| 1988 | // |
---|
| 1989 | // 3/ processor requests |
---|
| 1990 | // Processor requests are taken in IDLE state only. |
---|
| 1991 | // The IDLE state implements a two stages pipe-line to handle write bursts: |
---|
| 1992 | // - Both DTLB and DCACHE are accessed in stage P0 (if processor request valid). |
---|
| 1993 | // - The registration in wbuf and the dcache update is done in stage P1 |
---|
| 1994 | // (if the processor request is a write). |
---|
| 1995 | // The two r_dcache_wbuf_req and r_dcache_updt_req flip-flops define |
---|
| 1996 | // the operations that must be done in P1 stage, and the access type |
---|
| 1997 | // (read or write) to the DATA part of DCACHE depends on r_dcache_updt_req. |
---|
| 1998 | // READ requests are delayed if a cache update is requested. |
---|
| 1999 | // WRITE or SC requests can require a PTE Dirty bit update (in memory), |
---|
| 2000 | // that is done (before handling the processor request) by a dedicated sub-fsm. |
---|
| 2001 | // If a PTE is modified, both the itlb and dtlb are selectively, but sequencially |
---|
| 2002 | // cleared by a dedicated sub_fsm (DCACHE_INVAL_TLB_SCAN state). |
---|
| 2003 | // |
---|
| 2004 | // 4/ Atomic instructions LL/SC |
---|
| 2005 | // The LL/SC address are non cacheable (systematic access to memory). |
---|
| 2006 | // The llsc buffer contains a registration for an active LL/SC operation |
---|
| 2007 | // (with an address, a registration key, an aging counter and a valid bit). |
---|
| 2008 | // - LL requests from the processor are transmitted as a one flit VCI command |
---|
| 2009 | // (CMD_LOCKED_READ as CMD, and TYPE_LL as PKTID value). PLEN must |
---|
| 2010 | // be 8 as the response is 2 flits long (data and registration key) |
---|
| 2011 | // - SC requests from the processor are systematically transmitted to the |
---|
| 2012 | // memory cache as 2 flits VCI command (CMD_STORE_COND as CMD, and TYPE_SC |
---|
| 2013 | // as PKTID value). The first flit contains the registration key, the second |
---|
| 2014 | // flit contains the data to write in case of success. |
---|
| 2015 | // The cache is not updated, as this is done in case of success by the |
---|
| 2016 | // coherence transaction. |
---|
| 2017 | // |
---|
| 2018 | // 5/ Non cacheable access: |
---|
| 2019 | // This component implement a strong order between non cacheable access |
---|
| 2020 | // (read or write) : A new non cacheable VCI transaction starts only when |
---|
| 2021 | // the previous non cacheable transaction is completed. Both cacheable and |
---|
| 2022 | // non cacheable transactions use the write buffer, but the DCACHE FSM registers |
---|
| 2023 | // a non cacheable write transaction posted in the write buffer by setting the |
---|
| 2024 | // r_dcache_pending_unc_write flip_flop. All other non cacheable requests |
---|
| 2025 | // are stalled until this flip-flop is reset by the VCI_RSP_FSM (when the |
---|
| 2026 | // pending non cacheable write transaction completes). |
---|
| 2027 | // |
---|
| 2028 | // 6/ Error handling: |
---|
| 2029 | // When the MMU is not activated, Read Bus Errors are synchronous events, |
---|
| 2030 | // but Write Bus Errors are asynchronous events (processor is not frozen). |
---|
| 2031 | // - If a Read Bus Error is detected, the VCI_RSP FSM sets the |
---|
| 2032 | // r_vci_rsp_data_error flip-flop, without writing any data in the |
---|
| 2033 | // r_vci_rsp_fifo_dcache FIFO, and the synchronous error is signaled |
---|
| 2034 | // by the DCACHE FSM. |
---|
| 2035 | // - If a Write Bus Error is detected, the VCI_RSP FSM signals |
---|
| 2036 | // the asynchronous error using the setWriteBerr() method. |
---|
| 2037 | // When the MMU is activated bus error are rare events, as the MMU |
---|
| 2038 | // checks the physical address before the VCI transaction starts. |
---|
| 2039 | //////////////////////////////////////////////////////////////////////////////////////// |
---|
| 2040 | |
---|
| 2041 | // default value for m_drsp |
---|
| 2042 | m_drsp.valid = false; |
---|
| 2043 | m_drsp.error = false; |
---|
| 2044 | m_drsp.rdata = 0; |
---|
| 2045 | |
---|
| 2046 | switch ( r_dcache_fsm.read() ) |
---|
| 2047 | { |
---|
| 2048 | case DCACHE_IDLE: // There are 10 conditions to exit the IDLE state : |
---|
| 2049 | // 1) ITLB/DTLB inval request (update) => DCACHE_INVAL_TLB_SCAN |
---|
| 2050 | // 2) Coherence request (TGT FSM) => DCACHE_CC_CHECK |
---|
| 2051 | // 3) ITLB miss request (ICACHE FSM) => DCACHE_TLB_MISS |
---|
| 2052 | // 4) XTN request (processor) => DCACHE_XTN_* |
---|
| 2053 | // 5) DTLB miss (processor) => DCACHE_TLB_MISS |
---|
| 2054 | // 6) Dirty bit update (processor) => DCACHE_DIRTY_GET_PTE |
---|
| 2055 | // 7) Cacheable read miss (processor) => DCACHE_MISS_SELECT |
---|
| 2056 | // 8) Uncacheable read (processor) => DCACHE_UNC_WAIT |
---|
| 2057 | // 9) LL access (processor) => DCACHE_LL_WAIT |
---|
| 2058 | // 10) SC access (processor) => DCACHE_SC_WAIT |
---|
| 2059 | // |
---|
| 2060 | // There is a fixed priority to handle requests to DCACHE: |
---|
| 2061 | // 1/ the ITLB/DTLB invalidate requests |
---|
| 2062 | // 2/ the coherence requests, |
---|
| 2063 | // 3/ the processor requests (including DTLB miss), |
---|
| 2064 | // 4/ the ITLB miss requests, |
---|
| 2065 | // The address space processor request are handled as follows: |
---|
| 2066 | // - WRITE request is blocked if the Dirty bit mus be set. |
---|
| 2067 | // If DTLB hit, the P1 stage is activated (writes WBUF, and |
---|
| 2068 | // updates DCACHE if DCACHE hit) & processor request acknowledged. |
---|
| 2069 | // - READ request generate a simultaneouss access to DCACHE.DATA |
---|
| 2070 | // and DCACHE.DIR, but is delayed if DCACHE update required. |
---|
| 2071 | // |
---|
| 2072 | // There is 4 configurations defining the access type to |
---|
| 2073 | // DTLB, DCACHE.DATA, and DCACHE.DIR, depending on the |
---|
| 2074 | // dreq.valid (dreq) and r_dcache_updt_req (updt) signals: |
---|
| 2075 | // dreq / updt / DTLB / DCACHE.DIR / DCACHE.DATA / |
---|
| 2076 | // 0 / 0 / NOP / NOP / NOP / |
---|
| 2077 | // 0 / 1 / NOP / NOP / WRITE / |
---|
| 2078 | // 1 / 0 / READ / READ / NOP / |
---|
| 2079 | // 1 / 1 / READ / READ / WRITE / |
---|
| 2080 | // Those two registers are set at each cycle from the 3 signals |
---|
| 2081 | // updt_request, wbuf_request, wbuf_write_miss. |
---|
| 2082 | { |
---|
| 2083 | paddr_t paddr; // physical address |
---|
| 2084 | pte_info_t tlb_flags; |
---|
| 2085 | size_t tlb_way; |
---|
| 2086 | size_t tlb_set; |
---|
| 2087 | paddr_t tlb_nline; |
---|
| 2088 | size_t cache_way; |
---|
| 2089 | size_t cache_set; |
---|
| 2090 | size_t cache_word; |
---|
| 2091 | uint32_t cache_rdata = 0; |
---|
| 2092 | bool tlb_hit = false; |
---|
| 2093 | int cache_state = CACHE_SLOT_STATE_EMPTY; |
---|
| 2094 | |
---|
| 2095 | bool tlb_inval_required = false; // request TLB inval after cache update |
---|
| 2096 | bool wbuf_write_miss = false; // miss a WBUF write request |
---|
| 2097 | bool updt_request = false; // request DCACHE update in P1 stage |
---|
| 2098 | bool wbuf_request = false; // request WBUF write in P1 stage |
---|
| 2099 | |
---|
| 2100 | // physical address computation : systematic DTLB access if activated) |
---|
| 2101 | if ( m_dreq.valid ) |
---|
| 2102 | { |
---|
| 2103 | if ( r_mmu_mode.read() & DATA_TLB_MASK ) // DTLB activated |
---|
| 2104 | { |
---|
| 2105 | tlb_hit = r_dtlb.translate( m_dreq.addr, |
---|
| 2106 | &paddr, |
---|
| 2107 | &tlb_flags, |
---|
| 2108 | &tlb_nline, |
---|
| 2109 | &tlb_way, |
---|
| 2110 | &tlb_set ); |
---|
| 2111 | #ifdef INSTRUMENTATION |
---|
| 2112 | m_cpt_dtlb_read++; |
---|
| 2113 | #endif |
---|
| 2114 | } |
---|
| 2115 | else // identity mapping |
---|
| 2116 | { |
---|
| 2117 | paddr = (paddr_t)m_dreq.addr; |
---|
| 2118 | } |
---|
| 2119 | } // end physical address computation |
---|
| 2120 | |
---|
| 2121 | // systematic DCACHE access depending on r_dcache_updt_req (if activated) |
---|
| 2122 | if ( r_mmu_mode.read() & DATA_CACHE_MASK) |
---|
| 2123 | { |
---|
| 2124 | if ( m_dreq.valid and r_dcache_updt_req.read() ) // read DIR and write DATA |
---|
| 2125 | { |
---|
| 2126 | r_dcache.read_dir( paddr, |
---|
| 2127 | &cache_state, |
---|
| 2128 | &cache_way, |
---|
| 2129 | &cache_set, |
---|
| 2130 | &cache_word ); |
---|
| 2131 | |
---|
| 2132 | r_dcache.write( r_dcache_save_cache_way.read(), |
---|
| 2133 | r_dcache_save_cache_set.read(), |
---|
| 2134 | r_dcache_save_cache_word.read(), |
---|
| 2135 | r_dcache_save_wdata.read(), |
---|
| 2136 | r_dcache_save_be.read() ); |
---|
| 2137 | #ifdef INSTRUMENTATION |
---|
| 2138 | m_cpt_dcache_dir_read++; |
---|
| 2139 | m_cpt_dcache_data_write++; |
---|
| 2140 | #endif |
---|
| 2141 | } |
---|
| 2142 | else if ( m_dreq.valid and not r_dcache_updt_req.read() ) // read DIR and DATA |
---|
| 2143 | { |
---|
| 2144 | r_dcache.read( paddr, |
---|
| 2145 | &cache_rdata, |
---|
| 2146 | &cache_way, |
---|
| 2147 | &cache_set, |
---|
| 2148 | &cache_word, |
---|
| 2149 | &cache_state ); |
---|
[366] | 2150 | |
---|
[331] | 2151 | #ifdef INSTRUMENTATION |
---|
| 2152 | m_cpt_dcache_dir_read++; |
---|
| 2153 | m_cpt_dcache_data_read++; |
---|
| 2154 | #endif |
---|
| 2155 | } |
---|
| 2156 | else if ( not m_dreq.valid and r_dcache_updt_req.read() ) // write DATA |
---|
| 2157 | { |
---|
| 2158 | r_dcache.write( r_dcache_save_cache_way.read(), |
---|
| 2159 | r_dcache_save_cache_set.read(), |
---|
| 2160 | r_dcache_save_cache_word.read(), |
---|
| 2161 | r_dcache_save_wdata.read(), |
---|
| 2162 | r_dcache_save_be.read() ); |
---|
| 2163 | #ifdef INSTRUMENTATION |
---|
| 2164 | m_cpt_dcache_data_write++; |
---|
| 2165 | #endif |
---|
| 2166 | } |
---|
| 2167 | } // end dcache access |
---|
| 2168 | |
---|
| 2169 | // DCACHE update in P1 stage can require ITLB / DTLB inval or flush |
---|
| 2170 | if ( r_dcache_updt_req.read() ) |
---|
| 2171 | { |
---|
| 2172 | size_t way = r_dcache_save_cache_way.read(); |
---|
| 2173 | size_t set = r_dcache_save_cache_set.read(); |
---|
| 2174 | |
---|
| 2175 | if ( r_dcache_in_tlb[way*m_dcache_sets+set] ) |
---|
| 2176 | { |
---|
| 2177 | tlb_inval_required = true; |
---|
| 2178 | r_dcache_tlb_inval_set = 0; |
---|
| 2179 | r_dcache_tlb_inval_line = r_dcache_save_paddr.read()>> |
---|
| 2180 | (uint32_log2(m_dcache_words<<2)); |
---|
| 2181 | r_dcache_in_tlb[way*m_dcache_sets+set] = false; |
---|
| 2182 | } |
---|
| 2183 | else if ( r_dcache_contains_ptd[way*m_dcache_sets+set] ) |
---|
| 2184 | { |
---|
| 2185 | r_itlb.reset(); |
---|
| 2186 | r_dtlb.reset(); |
---|
| 2187 | r_dcache_contains_ptd[way*m_dcache_sets+set] = false; |
---|
| 2188 | } |
---|
| 2189 | |
---|
| 2190 | #if DEBUG_DCACHE |
---|
| 2191 | if ( m_debug_dcache_fsm ) |
---|
| 2192 | { |
---|
| 2193 | std::cout << " <PROC " << name() |
---|
| 2194 | << " DCACHE_IDLE> Cache update in P1 stage" << std::dec |
---|
| 2195 | << " / WAY = " << r_dcache_save_cache_way.read() |
---|
| 2196 | << " / SET = " << r_dcache_save_cache_set.read() |
---|
| 2197 | << " / WORD = " << r_dcache_save_cache_word.read() << std::hex |
---|
| 2198 | << " / DATA = " << r_dcache_save_wdata.read() |
---|
| 2199 | << " / BE = " << r_dcache_save_be.read() << std::endl; |
---|
| 2200 | } |
---|
| 2201 | #endif |
---|
| 2202 | } // end test TLB inval |
---|
| 2203 | |
---|
| 2204 | // Try WBUF update in P1 stage |
---|
| 2205 | // Miss if the write request is non cacheable, and there is a pending |
---|
| 2206 | // non cacheable write, or if the write buffer is full. |
---|
| 2207 | if ( r_dcache_wbuf_req.read() ) |
---|
| 2208 | { |
---|
| 2209 | // miss if write not cacheable, and previous non cacheable write registered |
---|
| 2210 | if ( not r_dcache_save_cacheable.read() and r_dcache_pending_unc_write.read() ) |
---|
| 2211 | { |
---|
| 2212 | wbuf_write_miss = true; |
---|
| 2213 | } |
---|
| 2214 | else // try a registration into write buffer |
---|
| 2215 | { |
---|
| 2216 | bool wok = r_wbuf.write( r_dcache_save_paddr.read(), |
---|
| 2217 | r_dcache_save_be.read(), |
---|
| 2218 | r_dcache_save_wdata.read(), |
---|
| 2219 | r_dcache_save_cacheable.read() ); |
---|
| 2220 | #ifdef INSTRUMENTATION |
---|
| 2221 | m_cpt_wbuf_write++; |
---|
| 2222 | #endif |
---|
| 2223 | if ( not wok ) // miss if write buffer full |
---|
| 2224 | { |
---|
| 2225 | wbuf_write_miss = true; |
---|
| 2226 | } |
---|
| 2227 | else // update the write_buffer state extension |
---|
| 2228 | { |
---|
| 2229 | if(not r_dcache_pending_unc_write.read()) |
---|
| 2230 | r_dcache_pending_unc_write = not r_dcache_save_cacheable.read(); |
---|
| 2231 | } |
---|
| 2232 | } |
---|
| 2233 | } // end WBUF update |
---|
| 2234 | |
---|
| 2235 | // Computing the response to processor, |
---|
| 2236 | // and the next value for r_dcache_fsm |
---|
| 2237 | |
---|
| 2238 | // itlb/dtlb invalidation self-request |
---|
| 2239 | if ( tlb_inval_required ) |
---|
| 2240 | { |
---|
| 2241 | r_dcache_fsm_scan_save = r_dcache_fsm.read(); |
---|
| 2242 | r_dcache_fsm = DCACHE_INVAL_TLB_SCAN; |
---|
| 2243 | } |
---|
| 2244 | |
---|
| 2245 | // coherence request (from CC_RECEIVE FSM) |
---|
| 2246 | else if ( r_cc_receive_dcache_req.read() ) |
---|
| 2247 | { |
---|
| 2248 | r_dcache_fsm = DCACHE_CC_CHECK; |
---|
| 2249 | r_dcache_fsm_cc_save = r_dcache_fsm.read(); |
---|
| 2250 | } |
---|
| 2251 | |
---|
| 2252 | // processor request (READ, WRITE, LL, SC, XTN_READ, XTN_WRITE) |
---|
| 2253 | // we don't take the processor request, and registers |
---|
| 2254 | // are frozen in case of wbuf_write_miss |
---|
| 2255 | else if ( m_dreq.valid and not wbuf_write_miss ) |
---|
| 2256 | { |
---|
| 2257 | // register processor request and DCACHE response |
---|
| 2258 | r_dcache_save_vaddr = m_dreq.addr; |
---|
| 2259 | r_dcache_save_be = m_dreq.be; |
---|
| 2260 | r_dcache_save_wdata = m_dreq.wdata; |
---|
| 2261 | r_dcache_save_paddr = paddr; |
---|
| 2262 | r_dcache_save_cache_way = cache_way; |
---|
| 2263 | r_dcache_save_cache_set = cache_set; |
---|
| 2264 | r_dcache_save_cache_word = cache_word; |
---|
| 2265 | |
---|
| 2266 | // READ XTN requests from processor |
---|
| 2267 | // They are executed in this DCACHE_IDLE state. |
---|
| 2268 | // The processor must not be in user mode |
---|
| 2269 | if (m_dreq.type == iss_t::XTN_READ) |
---|
| 2270 | { |
---|
| 2271 | int xtn_opcode = (int)m_dreq.addr/4; |
---|
| 2272 | |
---|
| 2273 | // checking processor mode: |
---|
| 2274 | if (m_dreq.mode == iss_t::MODE_USER) |
---|
| 2275 | { |
---|
| 2276 | r_mmu_detr = MMU_READ_PRIVILEGE_VIOLATION; |
---|
| 2277 | r_mmu_dbvar = m_dreq.addr; |
---|
| 2278 | m_drsp.valid = true; |
---|
| 2279 | m_drsp.error = true; |
---|
| 2280 | m_drsp.rdata = 0; |
---|
| 2281 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 2282 | } |
---|
| 2283 | else |
---|
| 2284 | { |
---|
| 2285 | switch( xtn_opcode ) |
---|
| 2286 | { |
---|
| 2287 | case iss_t::XTN_INS_ERROR_TYPE: |
---|
| 2288 | m_drsp.rdata = r_mmu_ietr.read(); |
---|
| 2289 | m_drsp.valid = true; |
---|
| 2290 | m_drsp.error = false; |
---|
| 2291 | break; |
---|
| 2292 | |
---|
| 2293 | case iss_t::XTN_DATA_ERROR_TYPE: |
---|
| 2294 | m_drsp.rdata = r_mmu_detr.read(); |
---|
| 2295 | m_drsp.valid = true; |
---|
| 2296 | m_drsp.error = false; |
---|
| 2297 | break; |
---|
| 2298 | |
---|
| 2299 | case iss_t::XTN_INS_BAD_VADDR: |
---|
| 2300 | m_drsp.rdata = r_mmu_ibvar.read(); |
---|
| 2301 | m_drsp.valid = true; |
---|
| 2302 | m_drsp.error = false; |
---|
| 2303 | break; |
---|
| 2304 | |
---|
| 2305 | case iss_t::XTN_DATA_BAD_VADDR: |
---|
| 2306 | m_drsp.rdata = r_mmu_dbvar.read(); |
---|
| 2307 | m_drsp.valid = true; |
---|
| 2308 | m_drsp.error = false; |
---|
| 2309 | break; |
---|
| 2310 | |
---|
| 2311 | case iss_t::XTN_PTPR: |
---|
| 2312 | m_drsp.rdata = r_mmu_ptpr.read(); |
---|
| 2313 | m_drsp.valid = true; |
---|
| 2314 | m_drsp.error = false; |
---|
| 2315 | break; |
---|
| 2316 | |
---|
| 2317 | case iss_t::XTN_TLB_MODE: |
---|
| 2318 | m_drsp.rdata = r_mmu_mode.read(); |
---|
| 2319 | m_drsp.valid = true; |
---|
| 2320 | m_drsp.error = false; |
---|
| 2321 | break; |
---|
| 2322 | |
---|
| 2323 | case iss_t::XTN_MMU_PARAMS: |
---|
| 2324 | m_drsp.rdata = r_mmu_params; |
---|
| 2325 | m_drsp.valid = true; |
---|
| 2326 | m_drsp.error = false; |
---|
| 2327 | break; |
---|
| 2328 | |
---|
| 2329 | case iss_t::XTN_MMU_RELEASE: |
---|
| 2330 | m_drsp.rdata = r_mmu_release; |
---|
| 2331 | m_drsp.valid = true; |
---|
| 2332 | m_drsp.error = false; |
---|
| 2333 | break; |
---|
| 2334 | |
---|
| 2335 | case iss_t::XTN_MMU_WORD_LO: |
---|
| 2336 | m_drsp.rdata = r_mmu_word_lo.read(); |
---|
| 2337 | m_drsp.valid = true; |
---|
| 2338 | m_drsp.error = false; |
---|
| 2339 | break; |
---|
| 2340 | |
---|
| 2341 | case iss_t::XTN_MMU_WORD_HI: |
---|
| 2342 | m_drsp.rdata = r_mmu_word_hi.read(); |
---|
| 2343 | m_drsp.valid = true; |
---|
| 2344 | m_drsp.error = false; |
---|
| 2345 | break; |
---|
| 2346 | |
---|
| 2347 | default: |
---|
| 2348 | r_mmu_detr = MMU_READ_UNDEFINED_XTN; |
---|
| 2349 | r_mmu_dbvar = m_dreq.addr; |
---|
| 2350 | m_drsp.valid = true; |
---|
| 2351 | m_drsp.error = true; |
---|
| 2352 | m_drsp.rdata = 0; |
---|
| 2353 | break; |
---|
| 2354 | } // end switch xtn_opcode |
---|
| 2355 | } // end else |
---|
| 2356 | } // end if XTN_READ |
---|
| 2357 | |
---|
| 2358 | // Handling WRITE XTN requests from processor. |
---|
| 2359 | // They are not executed in this DCACHE_IDLE state |
---|
| 2360 | // if they require access to the caches or the TLBs |
---|
| 2361 | // that are already accessed. |
---|
| 2362 | // Caches can be invalidated or flushed in user mode, |
---|
| 2363 | // and the sync instruction can be executed in user mode |
---|
| 2364 | else if (m_dreq.type == iss_t::XTN_WRITE) |
---|
| 2365 | { |
---|
| 2366 | int xtn_opcode = (int)m_dreq.addr/4; |
---|
| 2367 | r_dcache_xtn_opcode = xtn_opcode; |
---|
| 2368 | |
---|
| 2369 | // checking processor mode: |
---|
| 2370 | if ( (m_dreq.mode == iss_t::MODE_USER) && |
---|
[366] | 2371 | (xtn_opcode != iss_t::XTN_SYNC) && |
---|
[331] | 2372 | (xtn_opcode != iss_t::XTN_DCACHE_INVAL) && |
---|
| 2373 | (xtn_opcode != iss_t::XTN_DCACHE_FLUSH) && |
---|
| 2374 | (xtn_opcode != iss_t::XTN_ICACHE_INVAL) && |
---|
| 2375 | (xtn_opcode != iss_t::XTN_ICACHE_FLUSH) ) |
---|
| 2376 | { |
---|
| 2377 | r_mmu_detr = MMU_WRITE_PRIVILEGE_VIOLATION; |
---|
| 2378 | r_mmu_dbvar = m_dreq.addr; |
---|
| 2379 | m_drsp.valid = true; |
---|
| 2380 | m_drsp.error = true; |
---|
| 2381 | m_drsp.rdata = 0; |
---|
| 2382 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 2383 | } |
---|
| 2384 | else |
---|
| 2385 | { |
---|
| 2386 | switch( xtn_opcode ) |
---|
| 2387 | { |
---|
| 2388 | case iss_t::XTN_PTPR: // itlb & dtlb must be flushed |
---|
| 2389 | r_dcache_xtn_req = true; |
---|
| 2390 | r_dcache_fsm = DCACHE_XTN_SWITCH; |
---|
| 2391 | break; |
---|
| 2392 | |
---|
| 2393 | case iss_t::XTN_TLB_MODE: // no cache or tlb access |
---|
| 2394 | r_mmu_mode = m_dreq.wdata; |
---|
| 2395 | m_drsp.valid = true; |
---|
| 2396 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 2397 | break; |
---|
| 2398 | |
---|
| 2399 | case iss_t::XTN_DTLB_INVAL: // dtlb access |
---|
| 2400 | r_dcache_fsm = DCACHE_XTN_DT_INVAL; |
---|
| 2401 | break; |
---|
| 2402 | |
---|
| 2403 | case iss_t::XTN_ITLB_INVAL: // itlb access |
---|
| 2404 | r_dcache_xtn_req = true; |
---|
| 2405 | r_dcache_fsm = DCACHE_XTN_IT_INVAL; |
---|
| 2406 | break; |
---|
| 2407 | |
---|
| 2408 | case iss_t::XTN_DCACHE_INVAL: // dcache, dtlb & itlb access |
---|
| 2409 | r_dcache_fsm = DCACHE_XTN_DC_INVAL_VA; |
---|
| 2410 | break; |
---|
| 2411 | |
---|
| 2412 | case iss_t::XTN_MMU_DCACHE_PA_INV: // dcache, dtlb & itlb access |
---|
| 2413 | r_dcache_fsm = DCACHE_XTN_DC_INVAL_PA; |
---|
| 2414 | if (sizeof(paddr_t) <= 32) |
---|
| 2415 | { |
---|
| 2416 | assert(r_mmu_word_hi.read() == 0 && |
---|
| 2417 | "high bits should be 0 for 32bit paddr"); |
---|
| 2418 | r_dcache_save_paddr = (paddr_t)r_mmu_word_lo.read(); |
---|
| 2419 | } |
---|
| 2420 | else |
---|
| 2421 | { |
---|
| 2422 | r_dcache_save_paddr = (paddr_t)r_mmu_word_hi.read() << 32 | |
---|
| 2423 | (paddr_t)r_mmu_word_lo.read(); |
---|
| 2424 | } |
---|
| 2425 | break; |
---|
| 2426 | |
---|
| 2427 | case iss_t::XTN_DCACHE_FLUSH: // itlb and dtlb must be reset |
---|
| 2428 | r_dcache_flush_count = 0; |
---|
| 2429 | r_dcache_fsm = DCACHE_XTN_DC_FLUSH; |
---|
| 2430 | break; |
---|
| 2431 | |
---|
| 2432 | case iss_t::XTN_ICACHE_INVAL: // icache and itlb access |
---|
| 2433 | r_dcache_xtn_req = true; |
---|
| 2434 | r_dcache_fsm = DCACHE_XTN_IC_INVAL_VA; |
---|
| 2435 | break; |
---|
| 2436 | |
---|
| 2437 | case iss_t::XTN_MMU_ICACHE_PA_INV: // icache access |
---|
| 2438 | r_dcache_xtn_req = true; |
---|
| 2439 | r_dcache_fsm = DCACHE_XTN_IC_INVAL_PA; |
---|
| 2440 | break; |
---|
| 2441 | |
---|
| 2442 | case iss_t::XTN_ICACHE_FLUSH: // icache access |
---|
| 2443 | r_dcache_xtn_req = true; |
---|
| 2444 | r_dcache_fsm = DCACHE_XTN_IC_FLUSH; |
---|
| 2445 | break; |
---|
| 2446 | |
---|
| 2447 | case iss_t::XTN_SYNC: // wait until write buffer empty |
---|
| 2448 | r_dcache_fsm = DCACHE_XTN_SYNC; |
---|
| 2449 | break; |
---|
| 2450 | |
---|
| 2451 | case iss_t::XTN_MMU_WORD_LO: // no cache or tlb access |
---|
| 2452 | r_mmu_word_lo = m_dreq.wdata; |
---|
| 2453 | m_drsp.valid = true; |
---|
| 2454 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 2455 | break; |
---|
| 2456 | |
---|
| 2457 | case iss_t::XTN_MMU_WORD_HI: // no cache or tlb access |
---|
| 2458 | r_mmu_word_hi = m_dreq.wdata; |
---|
| 2459 | m_drsp.valid = true; |
---|
| 2460 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 2461 | break; |
---|
| 2462 | |
---|
| 2463 | case iss_t::XTN_MMU_LL_RESET: // no cache or tlb access |
---|
| 2464 | r_dcache_llsc_valid = false; |
---|
| 2465 | m_drsp.valid = true; |
---|
| 2466 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 2467 | break; |
---|
| 2468 | |
---|
| 2469 | case iss_t::XTN_ICACHE_PREFETCH: // not implemented : no action |
---|
| 2470 | case iss_t::XTN_DCACHE_PREFETCH: // not implemented : no action |
---|
| 2471 | m_drsp.valid = true; |
---|
| 2472 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 2473 | break; |
---|
| 2474 | |
---|
| 2475 | default: |
---|
| 2476 | r_mmu_detr = MMU_WRITE_UNDEFINED_XTN; |
---|
| 2477 | r_mmu_dbvar = m_dreq.addr; |
---|
| 2478 | m_drsp.valid = true; |
---|
| 2479 | m_drsp.error = true; |
---|
| 2480 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 2481 | break; |
---|
| 2482 | } // end switch xtn_opcode |
---|
| 2483 | } // end else |
---|
| 2484 | } // end if XTN_WRITE |
---|
| 2485 | |
---|
| 2486 | // Handling processor requests to address space (READ/WRITE/LL/SC) |
---|
| 2487 | // The dtlb and dcache can be activated or not. |
---|
| 2488 | // We compute the cacheability, and check processor request validity: |
---|
| 2489 | // - If DTLB not activated : cacheability is defined by the segment table, |
---|
| 2490 | // and there is no access rights checking. |
---|
| 2491 | // - If DTLB activated : cacheability is defined by the C bit in the PTE, |
---|
| 2492 | // and the U & W bits of the PTE are checked, as well as the DTLB hit. |
---|
| 2493 | // Jumps to the TLB_MISS sub-fsm in case of dtlb miss. |
---|
| 2494 | else |
---|
| 2495 | { |
---|
| 2496 | bool valid_req; |
---|
| 2497 | bool cacheable; |
---|
| 2498 | |
---|
| 2499 | if ( not (r_mmu_mode.read() & DATA_TLB_MASK) ) // dtlb not activated |
---|
| 2500 | { |
---|
| 2501 | valid_req = true; |
---|
| 2502 | |
---|
| 2503 | if ( not (r_mmu_mode.read() & DATA_CACHE_MASK) ) cacheable = false; |
---|
| 2504 | else cacheable = m_cacheability_table[m_dreq.addr]; |
---|
| 2505 | } |
---|
| 2506 | else // dtlb activated |
---|
| 2507 | { |
---|
| 2508 | if ( tlb_hit ) // tlb hit |
---|
| 2509 | { |
---|
| 2510 | // cacheability |
---|
| 2511 | if ( not (r_mmu_mode.read() & DATA_CACHE_MASK) ) cacheable = false; |
---|
| 2512 | else cacheable = tlb_flags.c; |
---|
| 2513 | |
---|
| 2514 | // access rights checking |
---|
| 2515 | if ( not tlb_flags.u and (m_dreq.mode == iss_t::MODE_USER)) |
---|
| 2516 | { |
---|
| 2517 | if ( (m_dreq.type == iss_t::DATA_READ) or |
---|
| 2518 | (m_dreq.type == iss_t::DATA_LL) ) |
---|
| 2519 | { |
---|
| 2520 | r_mmu_detr = MMU_READ_PRIVILEGE_VIOLATION; |
---|
| 2521 | } |
---|
| 2522 | else |
---|
| 2523 | { |
---|
| 2524 | r_mmu_detr = MMU_WRITE_PRIVILEGE_VIOLATION; |
---|
| 2525 | } |
---|
| 2526 | valid_req = false; |
---|
| 2527 | r_mmu_dbvar = m_dreq.addr; |
---|
| 2528 | m_drsp.valid = true; |
---|
| 2529 | m_drsp.error = true; |
---|
| 2530 | m_drsp.rdata = 0; |
---|
| 2531 | #if DEBUG_DCACHE |
---|
| 2532 | if ( m_debug_dcache_fsm ) |
---|
| 2533 | { |
---|
| 2534 | std::cout << " <PROC " << name() |
---|
| 2535 | << ".DCACHE_IDLE> HIT in dtlb, but privilege violation" << std::endl; |
---|
| 2536 | } |
---|
| 2537 | #endif |
---|
| 2538 | } |
---|
| 2539 | else if ( not tlb_flags.w and |
---|
| 2540 | ((m_dreq.type == iss_t::DATA_WRITE) or |
---|
| 2541 | (m_dreq.type == iss_t::DATA_SC)) ) |
---|
| 2542 | { |
---|
| 2543 | r_mmu_detr = MMU_WRITE_ACCES_VIOLATION; |
---|
| 2544 | valid_req = false; |
---|
| 2545 | r_mmu_dbvar = m_dreq.addr; |
---|
| 2546 | m_drsp.valid = true; |
---|
| 2547 | m_drsp.error = true; |
---|
| 2548 | m_drsp.rdata = 0; |
---|
| 2549 | #if DEBUG_DCACHE |
---|
| 2550 | if ( m_debug_dcache_fsm ) |
---|
| 2551 | { |
---|
| 2552 | std::cout << " <PROC " << name() |
---|
| 2553 | << ".DCACHE_IDLE> HIT in dtlb, but writable violation" << std::endl; |
---|
| 2554 | } |
---|
| 2555 | #endif |
---|
| 2556 | } |
---|
| 2557 | else |
---|
| 2558 | { |
---|
| 2559 | valid_req = true; |
---|
| 2560 | } |
---|
| 2561 | } |
---|
| 2562 | else // tlb miss |
---|
| 2563 | { |
---|
| 2564 | valid_req = false; |
---|
| 2565 | r_dcache_tlb_vaddr = m_dreq.addr; |
---|
| 2566 | r_dcache_tlb_ins = false; |
---|
| 2567 | r_dcache_fsm = DCACHE_TLB_MISS; |
---|
| 2568 | } |
---|
| 2569 | } // end DTLB activated |
---|
| 2570 | |
---|
| 2571 | if ( valid_req ) // processor request is valid after TLB check |
---|
| 2572 | { |
---|
| 2573 | r_dcache_save_cacheable = cacheable; |
---|
| 2574 | |
---|
| 2575 | // READ request |
---|
| 2576 | // The read requests are taken only if there is no cache update. |
---|
| 2577 | // We request a VCI transaction to CMD FSM if miss or uncachable |
---|
[366] | 2578 | |
---|
[331] | 2579 | if ( ((m_dreq.type == iss_t::DATA_READ)) |
---|
| 2580 | and not r_dcache_updt_req.read() ) |
---|
| 2581 | { |
---|
| 2582 | if ( cacheable ) // cacheable read |
---|
| 2583 | { |
---|
| 2584 | if ( cache_state == CACHE_SLOT_STATE_EMPTY ) // cache miss |
---|
| 2585 | { |
---|
| 2586 | #ifdef INSTRUMENTATION |
---|
| 2587 | m_cpt_dcache_miss++; |
---|
| 2588 | #endif |
---|
| 2589 | // request a VCI DMISS transaction |
---|
| 2590 | r_dcache_vci_paddr = paddr; |
---|
| 2591 | r_dcache_vci_miss_req = true; |
---|
| 2592 | r_dcache_miss_type = PROC_MISS; |
---|
| 2593 | r_dcache_fsm = DCACHE_MISS_SELECT; |
---|
| 2594 | #if DEBUG_DCACHE |
---|
| 2595 | if ( m_debug_dcache_fsm ) |
---|
| 2596 | { |
---|
| 2597 | std::cout << " <PROC " << name() |
---|
| 2598 | << ".DCACHE_IDLE> READ MISS in dcache" << std::endl; |
---|
| 2599 | } |
---|
| 2600 | #endif |
---|
| 2601 | } |
---|
| 2602 | else if (cache_state == CACHE_SLOT_STATE_ZOMBI ) // pending cleanup |
---|
| 2603 | { |
---|
| 2604 | // stalled until cleanup is acknowledged |
---|
| 2605 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 2606 | } |
---|
| 2607 | else // cache hit |
---|
| 2608 | { |
---|
| 2609 | #ifdef INSTRUMENTATION |
---|
| 2610 | m_cpt_data_read++; |
---|
| 2611 | #endif |
---|
| 2612 | // returns data to processor |
---|
| 2613 | m_drsp.valid = true; |
---|
| 2614 | m_drsp.error = false; |
---|
| 2615 | m_drsp.rdata = cache_rdata; |
---|
| 2616 | #if DEBUG_DCACHE |
---|
| 2617 | if ( m_debug_dcache_fsm ) |
---|
| 2618 | { |
---|
| 2619 | std::cout << " <PROC " << name() |
---|
| 2620 | << ".DCACHE_IDLE> READ HIT in dcache" << std::endl; |
---|
| 2621 | } |
---|
| 2622 | #endif |
---|
| 2623 | } |
---|
| 2624 | } |
---|
| 2625 | else // uncacheable read |
---|
| 2626 | { |
---|
| 2627 | r_dcache_vci_paddr = paddr; |
---|
| 2628 | r_dcache_vci_unc_be = m_dreq.be; |
---|
| 2629 | r_dcache_vci_unc_req = true; |
---|
| 2630 | r_dcache_fsm = DCACHE_UNC_WAIT; |
---|
| 2631 | #if DEBUG_DCACHE |
---|
| 2632 | if ( m_debug_dcache_fsm ) |
---|
| 2633 | { |
---|
| 2634 | std::cout << " <PROC " << name() |
---|
| 2635 | << ".DCACHE_IDLE> READ UNCACHEABLE in dcache" << std::endl; |
---|
| 2636 | } |
---|
| 2637 | #endif |
---|
| 2638 | } |
---|
| 2639 | } // end READ |
---|
| 2640 | |
---|
| 2641 | // LL request (non cachable) |
---|
| 2642 | // We request a VCI LL transaction to CMD FSM and register |
---|
| 2643 | // the LL/SC operation in llsc buffer. |
---|
| 2644 | else if (m_dreq.type == iss_t::DATA_LL) |
---|
| 2645 | { |
---|
| 2646 | // register paddr in LLSC buffer |
---|
| 2647 | r_dcache_llsc_paddr = paddr; |
---|
| 2648 | r_dcache_llsc_count = LLSC_TIMEOUT; |
---|
| 2649 | r_dcache_llsc_valid = true; |
---|
| 2650 | |
---|
| 2651 | // request an LL VCI transaction and go to DCACHE_LL_WAIT state |
---|
| 2652 | r_dcache_vci_ll_req = true; |
---|
| 2653 | r_dcache_vci_paddr = paddr; |
---|
| 2654 | r_dcache_ll_rsp_count = 0; |
---|
| 2655 | r_dcache_fsm = DCACHE_LL_WAIT; |
---|
| 2656 | |
---|
| 2657 | }// end LL |
---|
| 2658 | |
---|
| 2659 | // WRITE request: |
---|
| 2660 | // If the TLB is activated and the PTE Dirty bit is not set, we stall |
---|
| 2661 | // the processor and set the Dirty bit before handling the write request, |
---|
| 2662 | // going to the DCACHE_DIRTY_GT_PTE state. |
---|
| 2663 | // If we don't need to set the Dirty bit, we can acknowledge |
---|
| 2664 | // the processor request, as the write arguments (including the |
---|
| 2665 | // physical address) are registered in r_dcache_save registers, |
---|
| 2666 | // and the write will be done in the P1 pipeline stage. |
---|
| 2667 | else if ( m_dreq.type == iss_t::DATA_WRITE ) |
---|
| 2668 | { |
---|
| 2669 | if ( (r_mmu_mode.read() & DATA_TLB_MASK ) |
---|
| 2670 | and not tlb_flags.d ) // Dirty bit must be set |
---|
| 2671 | { |
---|
| 2672 | // The PTE physical address is obtained from the nline value (dtlb), |
---|
| 2673 | // and from the virtual address (word index) |
---|
| 2674 | if ( tlb_flags.b ) // PTE1 |
---|
| 2675 | { |
---|
| 2676 | r_dcache_dirty_paddr = (paddr_t)(tlb_nline*(m_dcache_words<<2)) | |
---|
| 2677 | (paddr_t)((m_dreq.addr>>19) & 0x3c); |
---|
| 2678 | } |
---|
| 2679 | else // PTE2 |
---|
| 2680 | { |
---|
| 2681 | r_dcache_dirty_paddr = (paddr_t)(tlb_nline*(m_dcache_words<<2)) | |
---|
| 2682 | (paddr_t)((m_dreq.addr>>9) & 0x38); |
---|
| 2683 | } |
---|
| 2684 | r_dcache_fsm = DCACHE_DIRTY_GET_PTE; |
---|
| 2685 | } |
---|
| 2686 | else // Write request accepted |
---|
| 2687 | { |
---|
| 2688 | #ifdef INSTRUMENTATION |
---|
| 2689 | m_cpt_data_write++; |
---|
| 2690 | #endif |
---|
| 2691 | // cleaning llsc buffer if address matching |
---|
| 2692 | if ( paddr == r_dcache_llsc_paddr.read() ) |
---|
| 2693 | r_dcache_llsc_valid = false; |
---|
| 2694 | |
---|
| 2695 | // response to processor |
---|
| 2696 | m_drsp.valid = true; |
---|
| 2697 | |
---|
| 2698 | // activating P1 stage |
---|
| 2699 | wbuf_request = true; |
---|
| 2700 | updt_request = (cache_state == CACHE_SLOT_STATE_VALID); |
---|
| 2701 | } |
---|
| 2702 | } // end WRITE |
---|
| 2703 | |
---|
| 2704 | // SC request: |
---|
| 2705 | // If the TLB is activated and the PTE Dirty bit is not set, we stall |
---|
| 2706 | // the processor and set the Dirty bit before handling the write request, |
---|
| 2707 | // going to the DCACHE_DIRTY_GT_PTE state. |
---|
| 2708 | // If we don't need to set the Dirty bit, we test the llsc buffer: |
---|
| 2709 | // If failure, we send a negative response to processor. |
---|
| 2710 | // If success, we request a SC transaction to CMD FSM and go |
---|
| 2711 | // to DCACHE_SC_WAIT state. |
---|
| 2712 | // We don't check a possible write hit in dcache, as the cache update |
---|
| 2713 | // is done by the coherence transaction induced by the SC... |
---|
| 2714 | else if ( m_dreq.type == iss_t::DATA_SC ) |
---|
| 2715 | { |
---|
| 2716 | if ( (r_mmu_mode.read() & DATA_TLB_MASK ) |
---|
| 2717 | and not tlb_flags.d ) // Dirty bit must be set |
---|
| 2718 | { |
---|
| 2719 | // The PTE physical address is obtained from the nline value (dtlb), |
---|
| 2720 | // and the word index (virtual address) |
---|
| 2721 | if ( tlb_flags.b ) // PTE1 |
---|
| 2722 | { |
---|
| 2723 | r_dcache_dirty_paddr = (paddr_t)(tlb_nline*(m_dcache_words<<2)) | |
---|
| 2724 | (paddr_t)((m_dreq.addr>>19) & 0x3c); |
---|
| 2725 | } |
---|
| 2726 | else // PTE2 |
---|
| 2727 | { |
---|
| 2728 | r_dcache_dirty_paddr = (paddr_t)(tlb_nline*(m_dcache_words<<2)) | |
---|
| 2729 | (paddr_t)((m_dreq.addr>>9) & 0x38); |
---|
| 2730 | } |
---|
| 2731 | r_dcache_fsm = DCACHE_DIRTY_GET_PTE; |
---|
| 2732 | m_drsp.valid = false; |
---|
| 2733 | m_drsp.error = false; |
---|
| 2734 | m_drsp.rdata = 0; |
---|
| 2735 | } |
---|
| 2736 | else // SC request accepted |
---|
| 2737 | { |
---|
| 2738 | #ifdef INSTRUMENTATION |
---|
| 2739 | m_cpt_data_sc++; |
---|
| 2740 | #endif |
---|
| 2741 | // checking local success |
---|
| 2742 | if( r_dcache_llsc_valid.read() and |
---|
| 2743 | (r_dcache_llsc_paddr.read() == paddr) ) // local success |
---|
| 2744 | { |
---|
| 2745 | // request an SC CMD and go to DCACHE_SC_WAIT state |
---|
| 2746 | r_dcache_vci_paddr = paddr; |
---|
| 2747 | r_dcache_vci_sc_req = true; |
---|
| 2748 | r_dcache_vci_sc_data = m_dreq.wdata; |
---|
| 2749 | r_dcache_fsm = DCACHE_SC_WAIT; |
---|
| 2750 | } |
---|
| 2751 | else // local fail |
---|
| 2752 | { |
---|
| 2753 | m_drsp.valid = true; |
---|
| 2754 | m_drsp.error = false; |
---|
| 2755 | m_drsp.rdata = 0x1; |
---|
| 2756 | } |
---|
| 2757 | } |
---|
| 2758 | } // end SC |
---|
| 2759 | } // end valid_req |
---|
| 2760 | } // end if read/write/ll/sc request |
---|
| 2761 | } // end processor request |
---|
| 2762 | |
---|
| 2763 | // itlb miss request |
---|
| 2764 | else if ( r_icache_tlb_miss_req.read() and not wbuf_write_miss ) |
---|
| 2765 | { |
---|
| 2766 | r_dcache_tlb_ins = true; |
---|
| 2767 | r_dcache_tlb_vaddr = r_icache_vaddr_save.read(); |
---|
| 2768 | r_dcache_fsm = DCACHE_TLB_MISS; |
---|
| 2769 | } |
---|
| 2770 | |
---|
| 2771 | // Computing requests for P1 stage : r_dcache_wbuf_req & r_dcache_updt_req |
---|
| 2772 | r_dcache_updt_req = updt_request; |
---|
| 2773 | r_dcache_wbuf_req = wbuf_request or |
---|
| 2774 | (r_dcache_wbuf_req.read() and wbuf_write_miss); |
---|
| 2775 | break; |
---|
| 2776 | } |
---|
| 2777 | ///////////////////// |
---|
| 2778 | case DCACHE_TLB_MISS: // This is the entry point for the sub-fsm handling all tlb miss. |
---|
| 2779 | // Input arguments are: |
---|
| 2780 | // - r_dcache_tlb_vaddr |
---|
| 2781 | // - r_dcache_tlb_ins (true when itlb miss) |
---|
| 2782 | // The sub-fsm access the dcache to find the missing TLB entry, |
---|
| 2783 | // and activates the cache miss procedure in case of miss. |
---|
| 2784 | // It bypass the first level page table access if possible. |
---|
| 2785 | // It uses atomic access to update the R/L access bits |
---|
| 2786 | // in the page table if required. |
---|
| 2787 | // It directly updates the itlb or dtlb, and writes into the |
---|
| 2788 | // r_mmu_ins_* or r_mmu_data* error reporting registers. |
---|
| 2789 | { |
---|
| 2790 | uint32_t ptba = 0; |
---|
| 2791 | bool bypass; |
---|
| 2792 | paddr_t pte_paddr; |
---|
| 2793 | |
---|
| 2794 | // evaluate bypass in order to skip first level page table access |
---|
| 2795 | if ( r_dcache_tlb_ins.read() ) // itlb miss |
---|
| 2796 | { |
---|
| 2797 | bypass = r_itlb.get_bypass(r_dcache_tlb_vaddr.read(), &ptba); |
---|
| 2798 | } |
---|
| 2799 | else // dtlb miss |
---|
| 2800 | { |
---|
| 2801 | bypass = r_dtlb.get_bypass(r_dcache_tlb_vaddr.read(), &ptba); |
---|
| 2802 | } |
---|
| 2803 | |
---|
| 2804 | if ( not bypass ) // Try to read PTE1/PTD1 in dcache |
---|
| 2805 | { |
---|
| 2806 | pte_paddr = (paddr_t)r_mmu_ptpr.read() << (INDEX1_NBITS+2) | |
---|
| 2807 | (paddr_t)((r_dcache_tlb_vaddr.read() >> PAGE_M_NBITS) << 2); |
---|
| 2808 | r_dcache_tlb_paddr = pte_paddr; |
---|
| 2809 | r_dcache_fsm = DCACHE_TLB_PTE1_GET; |
---|
| 2810 | } |
---|
| 2811 | else // Try to read PTE2 in dcache |
---|
| 2812 | { |
---|
| 2813 | pte_paddr = (paddr_t)ptba << PAGE_K_NBITS | |
---|
| 2814 | (paddr_t)(r_dcache_tlb_vaddr.read()&PTD_ID2_MASK)>>(PAGE_K_NBITS-3); |
---|
| 2815 | r_dcache_tlb_paddr = pte_paddr; |
---|
| 2816 | r_dcache_fsm = DCACHE_TLB_PTE2_GET; |
---|
| 2817 | } |
---|
| 2818 | |
---|
| 2819 | #if DEBUG_DCACHE |
---|
| 2820 | if ( m_debug_dcache_fsm ) |
---|
| 2821 | { |
---|
| 2822 | if ( r_dcache_tlb_ins.read() ) |
---|
| 2823 | { |
---|
| 2824 | std::cout << " <PROC " << name() << ".DCACHE_TLB_MISS> ITLB miss"; |
---|
| 2825 | } |
---|
| 2826 | else |
---|
| 2827 | { |
---|
| 2828 | std::cout << " <PROC " << name() << ".DCACHE_TLB_MISS> DTLB miss"; |
---|
| 2829 | } |
---|
| 2830 | std::cout << " / VADDR = " << std::hex << r_dcache_tlb_vaddr.read() |
---|
| 2831 | << " / BYPASS = " << bypass |
---|
| 2832 | << " / PTE_ADR = " << pte_paddr << std::endl; |
---|
| 2833 | } |
---|
| 2834 | #endif |
---|
| 2835 | |
---|
| 2836 | break; |
---|
| 2837 | } |
---|
| 2838 | ///////////////////////// |
---|
| 2839 | case DCACHE_TLB_PTE1_GET: // try to read a PT1 entry in dcache |
---|
| 2840 | { |
---|
[341] | 2841 | // coherence request (from CC_RECEIVE FSM) |
---|
| 2842 | if ( r_cc_receive_dcache_req.read() ) |
---|
| 2843 | { |
---|
| 2844 | r_dcache_fsm = DCACHE_CC_CHECK; |
---|
| 2845 | r_dcache_fsm_cc_save = r_dcache_fsm.read(); |
---|
| 2846 | break; |
---|
| 2847 | } |
---|
| 2848 | |
---|
[331] | 2849 | uint32_t entry; |
---|
| 2850 | size_t way; |
---|
| 2851 | size_t set; |
---|
| 2852 | size_t word; |
---|
[338] | 2853 | int cache_state; |
---|
| 2854 | r_dcache.read( r_dcache_tlb_paddr.read(), |
---|
| 2855 | &entry, |
---|
| 2856 | &way, |
---|
| 2857 | &set, |
---|
| 2858 | &word, |
---|
| 2859 | &cache_state ); |
---|
[331] | 2860 | #ifdef INSTRUMENTATION |
---|
| 2861 | m_cpt_dcache_data_read++; |
---|
| 2862 | m_cpt_dcache_dir_read++; |
---|
| 2863 | #endif |
---|
[338] | 2864 | if ( cache_state == CACHE_SLOT_STATE_VALID ) // hit in dcache |
---|
[331] | 2865 | { |
---|
| 2866 | if ( not (entry & PTE_V_MASK) ) // unmapped |
---|
| 2867 | { |
---|
| 2868 | if ( r_dcache_tlb_ins.read() ) |
---|
| 2869 | { |
---|
| 2870 | r_mmu_ietr = MMU_READ_PT1_UNMAPPED; |
---|
| 2871 | r_mmu_ibvar = r_dcache_tlb_vaddr.read(); |
---|
| 2872 | r_icache_tlb_miss_req = false; |
---|
| 2873 | r_icache_tlb_rsp_error = true; |
---|
| 2874 | } |
---|
| 2875 | else |
---|
| 2876 | { |
---|
| 2877 | r_mmu_detr = MMU_READ_PT1_UNMAPPED; |
---|
| 2878 | r_mmu_dbvar = r_dcache_tlb_vaddr.read(); |
---|
| 2879 | m_drsp.valid = true; |
---|
| 2880 | m_drsp.error = true; |
---|
| 2881 | } |
---|
| 2882 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 2883 | |
---|
| 2884 | #if DEBUG_DCACHE |
---|
| 2885 | if ( m_debug_dcache_fsm ) |
---|
| 2886 | { |
---|
| 2887 | std::cout << " <PROC " << name() << ".DCACHE_TLB_PTE1_GET> HIT in dcache, but unmapped" |
---|
| 2888 | << std::hex << " / paddr = " << r_dcache_tlb_paddr.read() |
---|
| 2889 | << std::dec << " / way = " << way |
---|
| 2890 | << std::dec << " / set = " << set |
---|
| 2891 | << std::dec << " / word = " << word |
---|
| 2892 | << std::hex << " / PTE1 = " << entry << std::endl; |
---|
| 2893 | } |
---|
| 2894 | #endif |
---|
| 2895 | |
---|
| 2896 | } |
---|
| 2897 | else if( entry & PTE_T_MASK ) // PTD : me must access PT2 |
---|
| 2898 | { |
---|
| 2899 | // mark the cache line ac containing a PTD |
---|
| 2900 | r_dcache_contains_ptd[m_dcache_sets*way+set] = true; |
---|
| 2901 | |
---|
| 2902 | // register bypass |
---|
| 2903 | if ( r_dcache_tlb_ins.read() ) // itlb |
---|
| 2904 | { |
---|
| 2905 | r_itlb.set_bypass(r_dcache_tlb_vaddr.read(), |
---|
| 2906 | entry & ((1 << (m_paddr_nbits-PAGE_K_NBITS)) - 1), |
---|
| 2907 | r_dcache_tlb_paddr.read() / (m_icache_words<<2) ); |
---|
| 2908 | } |
---|
| 2909 | else // dtlb |
---|
| 2910 | { |
---|
| 2911 | r_dtlb.set_bypass(r_dcache_tlb_vaddr.read(), |
---|
| 2912 | entry & ((1 << (m_paddr_nbits-PAGE_K_NBITS)) - 1), |
---|
| 2913 | r_dcache_tlb_paddr.read() / (m_dcache_words<<2) ); |
---|
| 2914 | } |
---|
| 2915 | r_dcache_tlb_paddr = |
---|
| 2916 | (paddr_t)(entry & ((1<<(m_paddr_nbits-PAGE_K_NBITS))-1)) << PAGE_K_NBITS | |
---|
| 2917 | (paddr_t)(((r_dcache_tlb_vaddr.read() & PTD_ID2_MASK) >> PAGE_K_NBITS) << 3); |
---|
| 2918 | r_dcache_fsm = DCACHE_TLB_PTE2_GET; |
---|
| 2919 | |
---|
| 2920 | #if DEBUG_DCACHE |
---|
| 2921 | if ( m_debug_dcache_fsm ) |
---|
| 2922 | { |
---|
| 2923 | std::cout << " <PROC " << name() << ".DCACHE_TLB_PTE1_GET> HIT in dcache" |
---|
| 2924 | << std::hex << " / paddr = " << r_dcache_tlb_paddr.read() |
---|
| 2925 | << std::dec << " / way = " << way |
---|
| 2926 | << std::dec << " / set = " << set |
---|
| 2927 | << std::dec << " / word = " << word |
---|
| 2928 | << std::hex << " / PTD = " << entry << std::endl; |
---|
| 2929 | } |
---|
| 2930 | #endif |
---|
| 2931 | } |
---|
| 2932 | else // PTE1 : we must update the TLB |
---|
| 2933 | { |
---|
| 2934 | r_dcache_in_tlb[m_icache_sets*way+set] = true; |
---|
| 2935 | r_dcache_tlb_pte_flags = entry; |
---|
| 2936 | r_dcache_tlb_cache_way = way; |
---|
| 2937 | r_dcache_tlb_cache_set = set; |
---|
| 2938 | r_dcache_tlb_cache_word = word; |
---|
| 2939 | r_dcache_fsm = DCACHE_TLB_PTE1_SELECT; |
---|
| 2940 | |
---|
| 2941 | #if DEBUG_DCACHE |
---|
| 2942 | if ( m_debug_dcache_fsm ) |
---|
| 2943 | { |
---|
| 2944 | std::cout << " <PROC " << name() << ".DCACHE_TLB_PTE1_GET> HIT in dcache" |
---|
| 2945 | << std::hex << " / paddr = " << r_dcache_tlb_paddr.read() |
---|
| 2946 | << std::dec << " / way = " << way |
---|
| 2947 | << std::dec << " / set = " << set |
---|
| 2948 | << std::dec << " / word = " << word |
---|
| 2949 | << std::hex << " / PTE1 = " << entry << std::endl; |
---|
| 2950 | } |
---|
| 2951 | #endif |
---|
| 2952 | } |
---|
| 2953 | } |
---|
[338] | 2954 | else if ( cache_state == CACHE_SLOT_STATE_ZOMBI ) // pending cleanup |
---|
| 2955 | { |
---|
| 2956 | // stalled until cleanup is acknowledged |
---|
| 2957 | r_dcache_fsm = DCACHE_TLB_PTE1_GET; |
---|
| 2958 | } |
---|
[331] | 2959 | else // we must load the missing cache line in dcache |
---|
| 2960 | { |
---|
| 2961 | r_dcache_vci_miss_req = true; |
---|
| 2962 | r_dcache_vci_paddr = r_dcache_tlb_paddr.read(); |
---|
| 2963 | r_dcache_save_paddr = r_dcache_tlb_paddr.read(); |
---|
| 2964 | r_dcache_miss_type = PTE1_MISS; |
---|
| 2965 | r_dcache_fsm = DCACHE_MISS_SELECT; |
---|
| 2966 | |
---|
| 2967 | #if DEBUG_DCACHE |
---|
| 2968 | if ( m_debug_dcache_fsm ) |
---|
| 2969 | { |
---|
| 2970 | std::cout << " <PROC " << name() << ".DCACHE_TLB_PTE1_GET> MISS in dcache:" |
---|
| 2971 | << " PTE1 address = " << std::hex << r_dcache_tlb_paddr.read() << std::endl; |
---|
| 2972 | } |
---|
| 2973 | #endif |
---|
| 2974 | } |
---|
| 2975 | break; |
---|
| 2976 | } |
---|
| 2977 | //////////////////////////// |
---|
| 2978 | case DCACHE_TLB_PTE1_SELECT: // select a slot for PTE1 |
---|
| 2979 | { |
---|
| 2980 | size_t way; |
---|
| 2981 | size_t set; |
---|
| 2982 | |
---|
| 2983 | if ( r_dcache_tlb_ins.read() ) |
---|
| 2984 | { |
---|
| 2985 | r_itlb.select( r_dcache_tlb_vaddr.read(), |
---|
| 2986 | true, // PTE1 |
---|
| 2987 | &way, |
---|
| 2988 | &set ); |
---|
| 2989 | #ifdef INSTRUMENTATION |
---|
| 2990 | m_cpt_itlb_read++; |
---|
| 2991 | #endif |
---|
| 2992 | } |
---|
| 2993 | else |
---|
| 2994 | { |
---|
| 2995 | r_dtlb.select( r_dcache_tlb_vaddr.read(), |
---|
| 2996 | true, // PTE1 |
---|
| 2997 | &way, |
---|
| 2998 | &set ); |
---|
| 2999 | #ifdef INSTRUMENTATION |
---|
| 3000 | m_cpt_dtlb_read++; |
---|
| 3001 | #endif |
---|
| 3002 | } |
---|
| 3003 | r_dcache_tlb_way = way; |
---|
| 3004 | r_dcache_tlb_set = set; |
---|
| 3005 | r_dcache_fsm = DCACHE_TLB_PTE1_UPDT; |
---|
| 3006 | |
---|
| 3007 | #if DEBUG_DCACHE |
---|
| 3008 | if ( m_debug_dcache_fsm ) |
---|
| 3009 | { |
---|
| 3010 | if ( r_dcache_tlb_ins.read() ) |
---|
| 3011 | std::cout << " <PROC " << name() << ".DCACHE_TLB_PTE1_SELECT> Select a slot in ITLB:"; |
---|
| 3012 | else |
---|
| 3013 | std::cout << " <PROC " << name() << ".DCACHE_TLB_PTE1_SELECT> Select a slot in DTLB:"; |
---|
| 3014 | std::cout << " way = " << std::dec << way |
---|
| 3015 | << " / set = " << set << std::endl; |
---|
| 3016 | } |
---|
| 3017 | #endif |
---|
| 3018 | break; |
---|
| 3019 | } |
---|
| 3020 | ////////////////////////// |
---|
| 3021 | case DCACHE_TLB_PTE1_UPDT: // write a new PTE1 in tlb after testing the L/R bit |
---|
| 3022 | // - if L/R bit already set, exit the sub-fsm. |
---|
| 3023 | // - if not, we update the page table but we dont write |
---|
| 3024 | // neither in DCACHE, nor in TLB, as this will be done by |
---|
| 3025 | // the coherence mechanism. |
---|
| 3026 | { |
---|
| 3027 | paddr_t nline = r_dcache_tlb_paddr.read() >> (uint32_log2(m_dcache_words)+2); |
---|
| 3028 | uint32_t pte = r_dcache_tlb_pte_flags.read(); |
---|
| 3029 | bool pt_updt = false; |
---|
| 3030 | bool local = true; |
---|
| 3031 | |
---|
| 3032 | // We should compute the access locality: |
---|
| 3033 | // The PPN MSB bits define the destination cluster index. |
---|
[346] | 3034 | // The m_srcid MSB bits define the source cluster index. |
---|
[331] | 3035 | // The number of bits to compare depends on the number of clusters, |
---|
| 3036 | // and can be obtained in the mapping table. |
---|
| 3037 | // As long as this computation is not done, all access are local. |
---|
| 3038 | |
---|
| 3039 | if ( local ) // local access |
---|
| 3040 | { |
---|
| 3041 | if ( not ((pte & PTE_L_MASK) == PTE_L_MASK) ) // we must set the L bit |
---|
| 3042 | { |
---|
| 3043 | pt_updt = true; |
---|
| 3044 | r_dcache_vci_cas_old = pte; |
---|
| 3045 | r_dcache_vci_cas_new = pte | PTE_L_MASK; |
---|
| 3046 | pte = pte | PTE_L_MASK; |
---|
| 3047 | r_dcache_tlb_pte_flags = pte; |
---|
| 3048 | } |
---|
| 3049 | } |
---|
| 3050 | else // remote access |
---|
| 3051 | { |
---|
| 3052 | if ( not ((pte & PTE_R_MASK) == PTE_R_MASK) ) // we must set the R bit |
---|
| 3053 | { |
---|
| 3054 | pt_updt = true; |
---|
| 3055 | r_dcache_vci_cas_old = pte; |
---|
| 3056 | r_dcache_vci_cas_new = pte | PTE_R_MASK; |
---|
| 3057 | pte = pte | PTE_R_MASK; |
---|
| 3058 | r_dcache_tlb_pte_flags = pte; |
---|
| 3059 | } |
---|
| 3060 | } |
---|
| 3061 | |
---|
| 3062 | if ( not pt_updt ) // update TLB and return |
---|
| 3063 | { |
---|
| 3064 | if ( r_dcache_tlb_ins.read() ) |
---|
| 3065 | { |
---|
| 3066 | r_itlb.write( true, // 2M page |
---|
| 3067 | pte, |
---|
| 3068 | 0, // argument unused for a PTE1 |
---|
| 3069 | r_dcache_tlb_vaddr.read(), |
---|
| 3070 | r_dcache_tlb_way.read(), |
---|
| 3071 | r_dcache_tlb_set.read(), |
---|
| 3072 | nline ); |
---|
| 3073 | #ifdef INSTRUMENTATION |
---|
| 3074 | m_cpt_itlb_write++; |
---|
| 3075 | #endif |
---|
| 3076 | |
---|
| 3077 | #if DEBUG_DCACHE |
---|
| 3078 | if ( m_debug_dcache_fsm ) |
---|
| 3079 | { |
---|
| 3080 | std::cout << " <PROC " << name() << ".DCACHE_TLB_PTE1_UPDT> write PTE1 in ITLB"; |
---|
| 3081 | std::cout << " / set = " << std::dec << r_dcache_tlb_set.read() |
---|
| 3082 | << " / way = " << r_dcache_tlb_way.read() << std::endl; |
---|
| 3083 | r_itlb.printTrace(); |
---|
| 3084 | } |
---|
| 3085 | #endif |
---|
| 3086 | } |
---|
| 3087 | else |
---|
| 3088 | { |
---|
| 3089 | r_dtlb.write( true, // 2M page |
---|
| 3090 | pte, |
---|
| 3091 | 0, // argument unused for a PTE1 |
---|
| 3092 | r_dcache_tlb_vaddr.read(), |
---|
| 3093 | r_dcache_tlb_way.read(), |
---|
| 3094 | r_dcache_tlb_set.read(), |
---|
| 3095 | nline ); |
---|
| 3096 | #ifdef INSTRUMENTATION |
---|
| 3097 | m_cpt_dtlb_write++; |
---|
| 3098 | #endif |
---|
| 3099 | |
---|
| 3100 | #if DEBUG_DCACHE |
---|
| 3101 | if ( m_debug_dcache_fsm ) |
---|
| 3102 | { |
---|
| 3103 | std::cout << " <PROC " << name() << ".DCACHE_TLB_PTE1_UPDT> write PTE1 in DTLB"; |
---|
| 3104 | std::cout << " / set = " << std::dec << r_dcache_tlb_set.read() |
---|
| 3105 | << " / way = " << r_dcache_tlb_way.read() << std::endl; |
---|
| 3106 | r_dtlb.printTrace(); |
---|
| 3107 | } |
---|
| 3108 | #endif |
---|
| 3109 | } |
---|
| 3110 | r_dcache_fsm = DCACHE_TLB_RETURN; |
---|
| 3111 | } |
---|
| 3112 | else // update page table but not TLB |
---|
| 3113 | { |
---|
| 3114 | r_dcache_fsm = DCACHE_TLB_LR_UPDT; |
---|
| 3115 | |
---|
| 3116 | #if DEBUG_DCACHE |
---|
| 3117 | if ( m_debug_dcache_fsm ) |
---|
| 3118 | { |
---|
| 3119 | std::cout << " <PROC " << name() << ".DCACHE_TLB_PTE1_UPDT> L/R bit update required" |
---|
| 3120 | << std::endl; |
---|
| 3121 | } |
---|
| 3122 | #endif |
---|
| 3123 | } |
---|
| 3124 | break; |
---|
| 3125 | } |
---|
| 3126 | ///////////////////////// |
---|
| 3127 | case DCACHE_TLB_PTE2_GET: // Try to get a PTE2 (64 bits) in the dcache |
---|
| 3128 | { |
---|
[341] | 3129 | // coherence request (from CC_RECEIVE FSM) |
---|
| 3130 | if ( r_cc_receive_dcache_req.read() ) |
---|
| 3131 | { |
---|
| 3132 | r_dcache_fsm = DCACHE_CC_CHECK; |
---|
| 3133 | r_dcache_fsm_cc_save = r_dcache_fsm.read(); |
---|
| 3134 | break; |
---|
| 3135 | } |
---|
| 3136 | |
---|
[331] | 3137 | uint32_t pte_flags; |
---|
| 3138 | uint32_t pte_ppn; |
---|
| 3139 | size_t way; |
---|
| 3140 | size_t set; |
---|
| 3141 | size_t word; |
---|
[338] | 3142 | int cache_state; |
---|
[331] | 3143 | |
---|
[338] | 3144 | r_dcache.read( r_dcache_tlb_paddr.read(), |
---|
| 3145 | &pte_flags, |
---|
| 3146 | &pte_ppn, |
---|
| 3147 | &way, |
---|
| 3148 | &set, |
---|
| 3149 | &word, |
---|
| 3150 | &cache_state ); |
---|
[331] | 3151 | #ifdef INSTRUMENTATION |
---|
| 3152 | m_cpt_dcache_data_read++; |
---|
| 3153 | m_cpt_dcache_dir_read++; |
---|
| 3154 | #endif |
---|
[338] | 3155 | if ( cache_state == CACHE_SLOT_STATE_VALID ) // hit in dcache |
---|
[331] | 3156 | { |
---|
| 3157 | if ( not (pte_flags & PTE_V_MASK) ) // unmapped |
---|
| 3158 | { |
---|
| 3159 | if ( r_dcache_tlb_ins.read() ) |
---|
| 3160 | { |
---|
| 3161 | r_mmu_ietr = MMU_READ_PT2_UNMAPPED; |
---|
| 3162 | r_mmu_ibvar = r_dcache_tlb_vaddr.read(); |
---|
| 3163 | r_icache_tlb_miss_req = false; |
---|
| 3164 | r_icache_tlb_rsp_error = true; |
---|
| 3165 | } |
---|
| 3166 | else |
---|
| 3167 | { |
---|
| 3168 | r_mmu_detr = MMU_READ_PT2_UNMAPPED; |
---|
| 3169 | r_mmu_dbvar = r_dcache_tlb_vaddr.read(); |
---|
[338] | 3170 | m_drsp.valid = true; |
---|
| 3171 | m_drsp.error = true; |
---|
[331] | 3172 | } |
---|
[338] | 3173 | r_dcache_fsm = DCACHE_IDLE; |
---|
[331] | 3174 | |
---|
| 3175 | #if DEBUG_DCACHE |
---|
| 3176 | if ( m_debug_dcache_fsm ) |
---|
| 3177 | { |
---|
| 3178 | std::cout << " <PROC " << name() |
---|
| 3179 | << " DCACHE_TLB_PTE2_GET> HIT in dcache, but PTE is unmapped" |
---|
| 3180 | << " PTE_FLAGS = " << std::hex << pte_flags |
---|
| 3181 | << " PTE_PPN = " << std::hex << pte_ppn << std::endl; |
---|
| 3182 | } |
---|
| 3183 | #endif |
---|
| 3184 | } |
---|
| 3185 | else // mapped : we must update the TLB |
---|
| 3186 | { |
---|
| 3187 | r_dcache_in_tlb[m_dcache_sets*way+set] = true; |
---|
| 3188 | r_dcache_tlb_pte_flags = pte_flags; |
---|
| 3189 | r_dcache_tlb_pte_ppn = pte_ppn; |
---|
| 3190 | r_dcache_tlb_cache_way = way; |
---|
| 3191 | r_dcache_tlb_cache_set = set; |
---|
| 3192 | r_dcache_tlb_cache_word = word; |
---|
| 3193 | r_dcache_fsm = DCACHE_TLB_PTE2_SELECT; |
---|
| 3194 | |
---|
| 3195 | #if DEBUG_DCACHE |
---|
| 3196 | if ( m_debug_dcache_fsm ) |
---|
| 3197 | { |
---|
| 3198 | std::cout << " <PROC " << name() << ".DCACHE_TLB_PTE2_GET> HIT in dcache:" |
---|
| 3199 | << " PTE_FLAGS = " << std::hex << pte_flags |
---|
| 3200 | << " PTE_PPN = " << std::hex << pte_ppn << std::endl; |
---|
| 3201 | } |
---|
| 3202 | #endif |
---|
| 3203 | } |
---|
| 3204 | } |
---|
[338] | 3205 | else if ( cache_state == CACHE_SLOT_STATE_ZOMBI ) // pending cleanup |
---|
| 3206 | { |
---|
| 3207 | // stalled until cleanup is acknowledged |
---|
| 3208 | r_dcache_fsm = DCACHE_TLB_PTE2_GET; |
---|
| 3209 | } |
---|
[331] | 3210 | else // we must load the missing cache line in dcache |
---|
| 3211 | { |
---|
| 3212 | r_dcache_fsm = DCACHE_MISS_SELECT; |
---|
| 3213 | r_dcache_vci_miss_req = true; |
---|
| 3214 | r_dcache_vci_paddr = r_dcache_tlb_paddr.read(); |
---|
| 3215 | r_dcache_save_paddr = r_dcache_tlb_paddr.read(); |
---|
| 3216 | r_dcache_miss_type = PTE2_MISS; |
---|
| 3217 | |
---|
| 3218 | #if DEBUG_DCACHE |
---|
| 3219 | if ( m_debug_dcache_fsm ) |
---|
| 3220 | { |
---|
| 3221 | std::cout << " <PROC " << name() |
---|
| 3222 | << " DCACHE_TLB_PTE2_GET> MISS in dcache:" |
---|
| 3223 | << " PTE address = " << std::hex << r_dcache_tlb_paddr.read() << std::endl; |
---|
| 3224 | } |
---|
| 3225 | #endif |
---|
| 3226 | } |
---|
| 3227 | break; |
---|
| 3228 | } |
---|
| 3229 | //////////////////////////// |
---|
| 3230 | case DCACHE_TLB_PTE2_SELECT: // select a slot for PTE2 |
---|
| 3231 | { |
---|
| 3232 | size_t way; |
---|
| 3233 | size_t set; |
---|
| 3234 | |
---|
| 3235 | if ( r_dcache_tlb_ins.read() ) |
---|
| 3236 | { |
---|
| 3237 | r_itlb.select( r_dcache_tlb_vaddr.read(), |
---|
| 3238 | false, // PTE2 |
---|
| 3239 | &way, |
---|
| 3240 | &set ); |
---|
| 3241 | #ifdef INSTRUMENTATION |
---|
| 3242 | m_cpt_itlb_read++; |
---|
| 3243 | #endif |
---|
| 3244 | } |
---|
| 3245 | else |
---|
| 3246 | { |
---|
| 3247 | r_dtlb.select( r_dcache_tlb_vaddr.read(), |
---|
| 3248 | false, // PTE2 |
---|
| 3249 | &way, |
---|
| 3250 | &set ); |
---|
| 3251 | #ifdef INSTRUMENTATION |
---|
| 3252 | m_cpt_dtlb_read++; |
---|
| 3253 | #endif |
---|
| 3254 | } |
---|
| 3255 | |
---|
| 3256 | #if DEBUG_DCACHE |
---|
| 3257 | if ( m_debug_dcache_fsm ) |
---|
| 3258 | { |
---|
| 3259 | if ( r_dcache_tlb_ins.read() ) |
---|
| 3260 | std::cout << " <PROC " << name() |
---|
| 3261 | << " DCACHE_TLB_PTE2_SELECT> Select a slot in ITLB:"; |
---|
| 3262 | else |
---|
| 3263 | std::cout << " <PROC " << name() |
---|
| 3264 | << " DCACHE_TLB_PTE2_SELECT> Select a slot in DTLB:"; |
---|
| 3265 | std::cout << " way = " << std::dec << way |
---|
| 3266 | << " / set = " << set << std::endl; |
---|
| 3267 | } |
---|
| 3268 | #endif |
---|
| 3269 | r_dcache_tlb_way = way; |
---|
| 3270 | r_dcache_tlb_set = set; |
---|
| 3271 | r_dcache_fsm = DCACHE_TLB_PTE2_UPDT; |
---|
| 3272 | break; |
---|
| 3273 | } |
---|
| 3274 | ////////////////////////// |
---|
| 3275 | case DCACHE_TLB_PTE2_UPDT: // write a new PTE2 in tlb after testing the L/R bit |
---|
| 3276 | // - if L/R bit already set, exit the sub-fsm. |
---|
| 3277 | // - if not, we update the page table but we dont write |
---|
| 3278 | // neither in DCACHE, nor in TLB, as this will be done by |
---|
| 3279 | // the coherence mechanism. |
---|
| 3280 | { |
---|
| 3281 | paddr_t nline = r_dcache_tlb_paddr.read() >> (uint32_log2(m_dcache_words)+2); |
---|
| 3282 | uint32_t pte_flags = r_dcache_tlb_pte_flags.read(); |
---|
| 3283 | uint32_t pte_ppn = r_dcache_tlb_pte_ppn.read(); |
---|
| 3284 | bool pt_updt = false; |
---|
| 3285 | bool local = true; |
---|
| 3286 | |
---|
| 3287 | // We should compute the access locality: |
---|
| 3288 | // The PPN MSB bits define the destination cluster index. |
---|
[346] | 3289 | // The m_srcid MSB bits define the source cluster index. |
---|
[331] | 3290 | // The number of bits to compare depends on the number of clusters, |
---|
| 3291 | // and can be obtained in the mapping table. |
---|
| 3292 | // As long as this computation is not done, all access are local. |
---|
| 3293 | |
---|
| 3294 | if ( local ) // local access |
---|
| 3295 | { |
---|
| 3296 | if ( not ((pte_flags & PTE_L_MASK) == PTE_L_MASK) ) // we must set the L bit |
---|
| 3297 | { |
---|
| 3298 | pt_updt = true; |
---|
[355] | 3299 | r_dcache_vci_cas_old = pte_flags; |
---|
| 3300 | r_dcache_vci_cas_new = pte_flags | PTE_L_MASK; |
---|
[331] | 3301 | pte_flags = pte_flags | PTE_L_MASK; |
---|
| 3302 | r_dcache_tlb_pte_flags = pte_flags; |
---|
| 3303 | } |
---|
| 3304 | } |
---|
| 3305 | else // remote access |
---|
| 3306 | { |
---|
| 3307 | if ( not ((pte_flags & PTE_R_MASK) == PTE_R_MASK) ) // we must set the R bit |
---|
| 3308 | { |
---|
| 3309 | pt_updt = true; |
---|
[355] | 3310 | r_dcache_vci_cas_old = pte_flags; |
---|
| 3311 | r_dcache_vci_cas_new = pte_flags | PTE_R_MASK; |
---|
[331] | 3312 | pte_flags = pte_flags | PTE_R_MASK; |
---|
| 3313 | r_dcache_tlb_pte_flags = pte_flags; |
---|
| 3314 | } |
---|
| 3315 | } |
---|
| 3316 | |
---|
| 3317 | if ( not pt_updt ) // update TLB |
---|
| 3318 | { |
---|
| 3319 | if ( r_dcache_tlb_ins.read() ) |
---|
| 3320 | { |
---|
| 3321 | r_itlb.write( false, // 4K page |
---|
| 3322 | pte_flags, |
---|
| 3323 | pte_ppn, |
---|
| 3324 | r_dcache_tlb_vaddr.read(), |
---|
| 3325 | r_dcache_tlb_way.read(), |
---|
| 3326 | r_dcache_tlb_set.read(), |
---|
| 3327 | nline ); |
---|
| 3328 | #ifdef INSTRUMENTATION |
---|
| 3329 | m_cpt_itlb_write++; |
---|
| 3330 | #endif |
---|
| 3331 | |
---|
| 3332 | #if DEBUG_DCACHE |
---|
| 3333 | if ( m_debug_dcache_fsm ) |
---|
| 3334 | { |
---|
| 3335 | std::cout << " <PROC " << name() |
---|
| 3336 | << " DCACHE_TLB_PTE2_UPDT> write PTE2 in ITLB" |
---|
| 3337 | << " / set = " << std::dec << r_dcache_tlb_set.read() |
---|
| 3338 | << " / way = " << r_dcache_tlb_way.read() << std::endl; |
---|
| 3339 | r_itlb.printTrace(); |
---|
| 3340 | } |
---|
| 3341 | #endif |
---|
| 3342 | } |
---|
| 3343 | else |
---|
| 3344 | { |
---|
| 3345 | r_dtlb.write( false, // 4K page |
---|
| 3346 | pte_flags, |
---|
| 3347 | pte_ppn, |
---|
| 3348 | r_dcache_tlb_vaddr.read(), |
---|
| 3349 | r_dcache_tlb_way.read(), |
---|
| 3350 | r_dcache_tlb_set.read(), |
---|
| 3351 | nline ); |
---|
| 3352 | #ifdef INSTRUMENTATION |
---|
| 3353 | m_cpt_dtlb_write++; |
---|
| 3354 | #endif |
---|
| 3355 | |
---|
| 3356 | #if DEBUG_DCACHE |
---|
| 3357 | if ( m_debug_dcache_fsm ) |
---|
| 3358 | { |
---|
| 3359 | std::cout << " <PROC " << name() |
---|
| 3360 | << " DCACHE_TLB_PTE2_UPDT> write PTE2 in DTLB" |
---|
| 3361 | << " / set = " << std::dec << r_dcache_tlb_set.read() |
---|
| 3362 | << " / way = " << r_dcache_tlb_way.read() << std::endl; |
---|
| 3363 | r_dtlb.printTrace(); |
---|
| 3364 | } |
---|
| 3365 | #endif |
---|
| 3366 | |
---|
| 3367 | } |
---|
| 3368 | r_dcache_fsm = DCACHE_TLB_RETURN; |
---|
| 3369 | } |
---|
| 3370 | else // update page table but not TLB |
---|
| 3371 | { |
---|
| 3372 | r_dcache_fsm = DCACHE_TLB_LR_UPDT; // dcache and page table update |
---|
| 3373 | |
---|
| 3374 | #if DEBUG_DCACHE |
---|
| 3375 | if ( m_debug_dcache_fsm ) |
---|
| 3376 | { |
---|
| 3377 | std::cout << " <PROC " << name() |
---|
| 3378 | << " DCACHE_TLB_PTE2_UPDT> L/R bit update required" << std::endl; |
---|
| 3379 | } |
---|
| 3380 | #endif |
---|
| 3381 | } |
---|
| 3382 | break; |
---|
| 3383 | } |
---|
| 3384 | //////////////////////// |
---|
| 3385 | case DCACHE_TLB_LR_UPDT: // request a CAS transaction to update L/R bit |
---|
| 3386 | { |
---|
| 3387 | #if DEBUG_DCACHE |
---|
| 3388 | if ( m_debug_dcache_fsm ) |
---|
| 3389 | { |
---|
| 3390 | std::cout << " <PROC " << name() |
---|
| 3391 | << " DCACHE_TLB_LR_UPDT> Update dcache: (L/R) bit" << std::endl; |
---|
| 3392 | } |
---|
| 3393 | #endif |
---|
| 3394 | // r_dcache_vci_cas_old & r_dcache_vci_cas_new registers are already set |
---|
| 3395 | r_dcache_vci_paddr = r_dcache_tlb_paddr.read(); |
---|
| 3396 | |
---|
| 3397 | // checking llsc reservation buffer |
---|
| 3398 | if ( r_dcache_llsc_paddr.read() == r_dcache_tlb_paddr.read() ) |
---|
| 3399 | r_dcache_llsc_valid = false; |
---|
| 3400 | |
---|
| 3401 | // request a CAS CMD and go to DCACHE_TLB_LR_WAIT state |
---|
| 3402 | r_dcache_vci_cas_req = true; |
---|
| 3403 | r_dcache_fsm = DCACHE_TLB_LR_WAIT; |
---|
| 3404 | break; |
---|
| 3405 | } |
---|
| 3406 | //////////////////////// |
---|
| 3407 | case DCACHE_TLB_LR_WAIT: // Waiting the response to SC transaction for DIRTY bit. |
---|
| 3408 | // We consume the response in rsp FIFO, |
---|
| 3409 | // and exit the sub-fsm, but we don't |
---|
| 3410 | // analyse the response, because we don't |
---|
| 3411 | // care if the L/R bit update is not done. |
---|
| 3412 | // We must take the coherence requests because |
---|
| 3413 | // there is a risk of dead-lock |
---|
| 3414 | |
---|
| 3415 | { |
---|
| 3416 | // coherence request (from CC_RECEIVE FSM) |
---|
| 3417 | if ( r_cc_receive_dcache_req.read() ) |
---|
| 3418 | { |
---|
| 3419 | r_dcache_fsm = DCACHE_CC_CHECK; |
---|
| 3420 | r_dcache_fsm_cc_save = r_dcache_fsm.read(); |
---|
| 3421 | break; |
---|
| 3422 | } |
---|
| 3423 | |
---|
| 3424 | if ( r_vci_rsp_data_error.read() ) // bus error |
---|
| 3425 | { |
---|
| 3426 | std::cout << "BUS ERROR in DCACHE_TLB_LR_WAIT state" << std::endl; |
---|
| 3427 | std::cout << "This should not happen in this state" << std::endl; |
---|
| 3428 | exit(0); |
---|
| 3429 | } |
---|
| 3430 | else if ( r_vci_rsp_fifo_dcache.rok() ) // response available |
---|
| 3431 | { |
---|
| 3432 | #if DEBUG_DCACHE |
---|
| 3433 | if ( m_debug_dcache_fsm ) |
---|
| 3434 | { |
---|
| 3435 | std::cout << " <PROC " << name() |
---|
| 3436 | << " DCACHE_TLB_LR_WAIT> SC response received" << std::endl; |
---|
| 3437 | } |
---|
| 3438 | #endif |
---|
| 3439 | vci_rsp_fifo_dcache_get = true; |
---|
| 3440 | r_dcache_fsm = DCACHE_TLB_RETURN; |
---|
| 3441 | } |
---|
| 3442 | break; |
---|
| 3443 | } |
---|
| 3444 | /////////////////////// |
---|
| 3445 | case DCACHE_TLB_RETURN: // return to caller depending on tlb miss type |
---|
| 3446 | { |
---|
| 3447 | #if DEBUG_DCACHE |
---|
| 3448 | if ( m_debug_dcache_fsm ) |
---|
| 3449 | { |
---|
| 3450 | std::cout << " <PROC " << name() |
---|
| 3451 | << " DCACHE_TLB_RETURN> TLB MISS completed" << std::endl; |
---|
| 3452 | } |
---|
| 3453 | #endif |
---|
| 3454 | if ( r_dcache_tlb_ins.read() ) r_icache_tlb_miss_req = false; |
---|
| 3455 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 3456 | break; |
---|
| 3457 | } |
---|
| 3458 | /////////////////////// |
---|
| 3459 | case DCACHE_XTN_SWITCH: // The r_ptpr registers must be written, |
---|
| 3460 | // and both itlb and dtlb must be flushed. |
---|
| 3461 | // Caution : the itlb miss requests must be taken |
---|
| 3462 | // to avoid dead-lock in case of simultaneous ITLB miss |
---|
| 3463 | { |
---|
| 3464 | // itlb miss request |
---|
| 3465 | if ( r_icache_tlb_miss_req.read() ) |
---|
| 3466 | { |
---|
| 3467 | r_dcache_tlb_ins = true; |
---|
| 3468 | r_dcache_tlb_vaddr = r_icache_vaddr_save.read(); |
---|
| 3469 | r_dcache_fsm = DCACHE_TLB_MISS; |
---|
| 3470 | break; |
---|
| 3471 | } |
---|
| 3472 | |
---|
| 3473 | if ( not r_dcache_xtn_req.read() ) |
---|
| 3474 | { |
---|
| 3475 | r_dtlb.flush(); |
---|
| 3476 | r_mmu_ptpr = m_dreq.wdata; |
---|
| 3477 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 3478 | m_drsp.valid = true; |
---|
| 3479 | } |
---|
| 3480 | break; |
---|
| 3481 | } |
---|
| 3482 | ///////////////////// |
---|
| 3483 | case DCACHE_XTN_SYNC: // waiting until write buffer empty |
---|
| 3484 | // The coherence request must be taken |
---|
| 3485 | // as there is a risk of dead-lock |
---|
| 3486 | { |
---|
| 3487 | // coherence request (from CC_RECEIVE FSM) |
---|
| 3488 | if ( r_cc_receive_dcache_req.read() ) |
---|
| 3489 | { |
---|
| 3490 | r_dcache_fsm = DCACHE_CC_CHECK; |
---|
| 3491 | r_dcache_fsm_cc_save = r_dcache_fsm.read(); |
---|
| 3492 | } |
---|
| 3493 | |
---|
| 3494 | if ( r_wbuf.empty() ) |
---|
| 3495 | { |
---|
| 3496 | m_drsp.valid = true; |
---|
| 3497 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 3498 | } |
---|
| 3499 | break; |
---|
| 3500 | } |
---|
| 3501 | //////////////////////// |
---|
| 3502 | case DCACHE_XTN_IC_FLUSH: // Waiting completion of an XTN request to the ICACHE FSM |
---|
| 3503 | case DCACHE_XTN_IC_INVAL_VA: // Caution : the itlb miss requests must be taken |
---|
| 3504 | case DCACHE_XTN_IC_INVAL_PA: // because the XTN_ICACHE_INVAL request to icache |
---|
| 3505 | case DCACHE_XTN_IT_INVAL: // can generate an itlb miss, |
---|
| 3506 | // and because it can exist a simultaneous ITLB miss |
---|
| 3507 | { |
---|
| 3508 | // coherence request (from CC_RECEIVE FSM) |
---|
| 3509 | if ( r_cc_receive_dcache_req.read() ) |
---|
| 3510 | { |
---|
| 3511 | r_dcache_fsm = DCACHE_CC_CHECK; |
---|
| 3512 | r_dcache_fsm_cc_save = r_dcache_fsm.read(); |
---|
| 3513 | break; |
---|
| 3514 | } |
---|
| 3515 | |
---|
| 3516 | // itlb miss request |
---|
| 3517 | if ( r_icache_tlb_miss_req.read() ) |
---|
| 3518 | { |
---|
| 3519 | r_dcache_tlb_ins = true; |
---|
| 3520 | r_dcache_tlb_vaddr = r_icache_vaddr_save.read(); |
---|
| 3521 | r_dcache_fsm = DCACHE_TLB_MISS; |
---|
| 3522 | break; |
---|
| 3523 | } |
---|
| 3524 | |
---|
| 3525 | // test if XTN request to icache completed |
---|
| 3526 | if ( not r_dcache_xtn_req.read() ) |
---|
| 3527 | { |
---|
| 3528 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 3529 | m_drsp.valid = true; |
---|
| 3530 | } |
---|
| 3531 | break; |
---|
| 3532 | } |
---|
| 3533 | ///////////////////////// |
---|
| 3534 | case DCACHE_XTN_DC_FLUSH: // Invalidate sequencially all cache lines, using |
---|
| 3535 | // r_dcache_flush_count as a slot counter, |
---|
| 3536 | // looping in this state until all slots have been visited. |
---|
| 3537 | // It can require two cycles per slot: |
---|
| 3538 | // We test here the slot state, and make the actual inval |
---|
| 3539 | // (if line is valid) in DCACHE_XTN_DC_FLUSH_GO state. |
---|
| 3540 | // A cleanup request is generated for each valid line. |
---|
| 3541 | // returns to IDLE and flush TLBs when last slot |
---|
| 3542 | { |
---|
| 3543 | if ( not r_dcache_cc_send_req.read() ) // blocked until previous cc_send request is sent |
---|
| 3544 | { |
---|
| 3545 | int state; |
---|
| 3546 | uint32_t tag; |
---|
| 3547 | size_t way = r_dcache_flush_count.read()/m_dcache_sets; |
---|
| 3548 | size_t set = r_dcache_flush_count.read()%m_dcache_sets; |
---|
| 3549 | |
---|
| 3550 | #ifdef INSTRUMENTATION |
---|
| 3551 | m_cpt_dcache_dir_read++; |
---|
| 3552 | #endif |
---|
| 3553 | r_dcache.read_dir( way, |
---|
| 3554 | set, |
---|
| 3555 | &tag, |
---|
| 3556 | &state ); |
---|
| 3557 | |
---|
| 3558 | if ( state == CACHE_SLOT_STATE_VALID ) // inval required |
---|
| 3559 | { |
---|
| 3560 | // request cleanup |
---|
| 3561 | r_dcache_cc_send_req = true; |
---|
| 3562 | r_dcache_cc_send_nline = tag * m_dcache_sets; |
---|
| 3563 | r_dcache_cc_send_way = way; |
---|
| 3564 | r_dcache_cc_send_type = CC_TYPE_CLEANUP; |
---|
| 3565 | |
---|
| 3566 | // goes to DCACHE_XTN_DC_FLUSH_GO to inval directory |
---|
| 3567 | r_dcache_miss_way = way; |
---|
| 3568 | r_dcache_miss_set = set; |
---|
| 3569 | r_dcache_fsm = DCACHE_XTN_DC_FLUSH_GO; |
---|
| 3570 | } |
---|
| 3571 | else if ( r_dcache_flush_count.read() == |
---|
| 3572 | (m_dcache_sets*m_dcache_ways - 1) ) // last slot |
---|
| 3573 | { |
---|
| 3574 | r_dtlb.reset(); |
---|
| 3575 | r_itlb.reset(); |
---|
| 3576 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 3577 | m_drsp.valid = true; |
---|
| 3578 | } |
---|
| 3579 | |
---|
| 3580 | // saturation counter |
---|
| 3581 | if ( r_dcache_flush_count.read() < (m_dcache_sets*m_dcache_ways - 1) ) |
---|
| 3582 | r_dcache_flush_count = r_dcache_flush_count.read() + 1; |
---|
| 3583 | } |
---|
| 3584 | break; |
---|
| 3585 | } |
---|
| 3586 | //////////////////////////// |
---|
| 3587 | case DCACHE_XTN_DC_FLUSH_GO: // Switch the cache slot to ZOMBI state |
---|
| 3588 | // and reset directory extension. |
---|
| 3589 | // returns to IDLE and flush TLBs when last slot |
---|
| 3590 | { |
---|
| 3591 | size_t way = r_dcache_miss_way.read(); |
---|
| 3592 | size_t set = r_dcache_miss_set.read(); |
---|
| 3593 | |
---|
| 3594 | r_dcache_in_tlb[m_dcache_sets*way+set] = false; |
---|
| 3595 | r_dcache_contains_ptd[m_dcache_sets*way+set] = false; |
---|
| 3596 | |
---|
| 3597 | #ifdef INSTRUMENTATION |
---|
| 3598 | m_cpt_dcache_dir_write++; |
---|
| 3599 | #endif |
---|
[366] | 3600 | r_dcache.write_dir( way, |
---|
[331] | 3601 | set, |
---|
| 3602 | CACHE_SLOT_STATE_ZOMBI ); |
---|
| 3603 | |
---|
| 3604 | if ( r_dcache_flush_count.read() == |
---|
| 3605 | (m_dcache_sets*m_dcache_ways - 1) ) // last slot |
---|
| 3606 | { |
---|
| 3607 | r_dtlb.reset(); |
---|
| 3608 | r_itlb.reset(); |
---|
| 3609 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 3610 | m_drsp.valid = true; |
---|
| 3611 | } |
---|
| 3612 | else |
---|
| 3613 | { |
---|
| 3614 | r_dcache_fsm = DCACHE_XTN_DC_FLUSH; |
---|
| 3615 | } |
---|
| 3616 | break; |
---|
| 3617 | } |
---|
| 3618 | ///////////////////////// |
---|
| 3619 | case DCACHE_XTN_DT_INVAL: // handling processor XTN_DTLB_INVAL request |
---|
| 3620 | { |
---|
| 3621 | r_dtlb.inval(r_dcache_save_wdata.read()); |
---|
| 3622 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 3623 | m_drsp.valid = true; |
---|
| 3624 | break; |
---|
| 3625 | } |
---|
| 3626 | //////////////////////////// |
---|
| 3627 | case DCACHE_XTN_DC_INVAL_VA: // selective cache line invalidate with virtual address |
---|
| 3628 | // requires 3 cycles: access tlb, read cache, inval cache |
---|
| 3629 | // we compute the physical address in this state |
---|
| 3630 | { |
---|
| 3631 | paddr_t paddr; |
---|
| 3632 | bool hit; |
---|
| 3633 | |
---|
| 3634 | if ( r_mmu_mode.read() & DATA_TLB_MASK ) // dtlb activated |
---|
| 3635 | { |
---|
| 3636 | |
---|
| 3637 | #ifdef INSTRUMENTATION |
---|
| 3638 | m_cpt_dtlb_read++; |
---|
| 3639 | #endif |
---|
| 3640 | hit = r_dtlb.translate( r_dcache_save_wdata.read(), |
---|
| 3641 | &paddr ); |
---|
| 3642 | } |
---|
| 3643 | else // dtlb not activated |
---|
| 3644 | { |
---|
| 3645 | paddr = (paddr_t)r_dcache_save_wdata.read(); |
---|
| 3646 | hit = true; |
---|
| 3647 | } |
---|
| 3648 | |
---|
| 3649 | if ( hit ) // tlb hit |
---|
| 3650 | { |
---|
| 3651 | r_dcache_save_paddr = paddr; |
---|
| 3652 | r_dcache_fsm = DCACHE_XTN_DC_INVAL_PA; |
---|
| 3653 | } |
---|
| 3654 | else // tlb miss |
---|
| 3655 | { |
---|
| 3656 | |
---|
| 3657 | #ifdef INSTRUMENTATION |
---|
| 3658 | m_cpt_dtlb_miss++; |
---|
| 3659 | #endif |
---|
| 3660 | r_dcache_tlb_ins = false; // dtlb |
---|
| 3661 | r_dcache_tlb_vaddr = r_dcache_save_wdata.read(); |
---|
| 3662 | r_dcache_fsm = DCACHE_TLB_MISS; |
---|
| 3663 | } |
---|
| 3664 | |
---|
| 3665 | #if DEBUG_DCACHE |
---|
| 3666 | if ( m_debug_dcache_fsm ) |
---|
| 3667 | { |
---|
| 3668 | std::cout << " <PROC " << name() |
---|
| 3669 | << " DCACHE_XTN_DC_INVAL_VA> Compute physical address" << std::hex |
---|
| 3670 | << " / VADDR = " << r_dcache_save_wdata.read() |
---|
| 3671 | << " / PADDR = " << paddr << std::endl; |
---|
| 3672 | } |
---|
| 3673 | #endif |
---|
| 3674 | |
---|
| 3675 | break; |
---|
| 3676 | } |
---|
| 3677 | //////////////////////////// |
---|
| 3678 | case DCACHE_XTN_DC_INVAL_PA: // selective cache line invalidate with physical address |
---|
| 3679 | // requires 2 cycles: read cache / inval cache |
---|
| 3680 | // In this state we read dcache. |
---|
| 3681 | { |
---|
| 3682 | size_t way; |
---|
| 3683 | size_t set; |
---|
| 3684 | size_t word; |
---|
| 3685 | int state; |
---|
| 3686 | |
---|
| 3687 | #ifdef INSTRUMENTATION |
---|
| 3688 | m_cpt_dcache_dir_read++; |
---|
| 3689 | #endif |
---|
| 3690 | r_dcache.read_dir( r_dcache_save_paddr.read(), |
---|
| 3691 | &state, |
---|
| 3692 | &way, |
---|
| 3693 | &set, |
---|
| 3694 | &word ); |
---|
| 3695 | |
---|
| 3696 | if ( state == CACHE_SLOT_STATE_VALID ) // inval to be done |
---|
| 3697 | { |
---|
| 3698 | r_dcache_xtn_way = way; |
---|
| 3699 | r_dcache_xtn_set = set; |
---|
| 3700 | r_dcache_fsm = DCACHE_XTN_DC_INVAL_GO; |
---|
| 3701 | } |
---|
| 3702 | else // miss : nothing to do |
---|
| 3703 | { |
---|
| 3704 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 3705 | m_drsp.valid = true; |
---|
| 3706 | } |
---|
| 3707 | |
---|
| 3708 | #if DEBUG_DCACHE |
---|
| 3709 | if ( m_debug_dcache_fsm ) |
---|
| 3710 | { |
---|
| 3711 | std::cout << " <PROC " << name() |
---|
| 3712 | << " DCACHE_XTN_DC_INVAL_PA> Test hit in dcache" << std::hex |
---|
| 3713 | << " / PADDR = " << r_dcache_save_paddr.read() << std::dec |
---|
| 3714 | << " / HIT = " << (state == CACHE_SLOT_STATE_VALID) |
---|
| 3715 | << " / SET = " << set |
---|
| 3716 | << " / WAY = " << way << std::endl; |
---|
| 3717 | } |
---|
| 3718 | #endif |
---|
| 3719 | break; |
---|
| 3720 | } |
---|
| 3721 | //////////////////////////// |
---|
| 3722 | case DCACHE_XTN_DC_INVAL_GO: // In this state, we invalidate the cache line |
---|
| 3723 | // Blocked if previous cleanup not completed |
---|
| 3724 | // Test if itlb or dtlb inval is required |
---|
| 3725 | { |
---|
| 3726 | if ( not r_dcache_cc_send_req.read() ) // blocked until previous cc_send request is sent |
---|
| 3727 | { |
---|
| 3728 | size_t way = r_dcache_xtn_way.read(); |
---|
| 3729 | size_t set = r_dcache_xtn_set.read(); |
---|
| 3730 | paddr_t nline = r_dcache_save_paddr.read() / (m_dcache_words<<2); |
---|
| 3731 | |
---|
| 3732 | #ifdef INSTRUMENTATION |
---|
| 3733 | m_cpt_dcache_dir_write++; |
---|
| 3734 | #endif |
---|
[366] | 3735 | r_dcache.write_dir( way, |
---|
[331] | 3736 | set, |
---|
[364] | 3737 | CACHE_SLOT_STATE_ZOMBI ); |
---|
[331] | 3738 | |
---|
| 3739 | // request cleanup |
---|
| 3740 | r_dcache_cc_send_req = true; |
---|
| 3741 | r_dcache_cc_send_nline = nline; |
---|
| 3742 | r_dcache_cc_send_way = way; |
---|
| 3743 | r_dcache_cc_send_type = CC_TYPE_CLEANUP; |
---|
| 3744 | |
---|
| 3745 | // possible itlb & dtlb invalidate |
---|
| 3746 | if ( r_dcache_in_tlb[way*m_dcache_sets+set] ) |
---|
| 3747 | { |
---|
| 3748 | r_dcache_tlb_inval_line = nline; |
---|
| 3749 | r_dcache_tlb_inval_set = 0; |
---|
| 3750 | r_dcache_fsm_scan_save = DCACHE_XTN_DC_INVAL_END; |
---|
| 3751 | r_dcache_fsm = DCACHE_INVAL_TLB_SCAN; |
---|
| 3752 | r_dcache_in_tlb[way*m_dcache_sets+set] = false; |
---|
| 3753 | } |
---|
| 3754 | else if ( r_dcache_contains_ptd[way*m_dcache_sets+set] ) |
---|
| 3755 | { |
---|
| 3756 | r_itlb.reset(); |
---|
| 3757 | r_dtlb.reset(); |
---|
| 3758 | r_dcache_contains_ptd[way*m_dcache_sets+set] = false; |
---|
| 3759 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 3760 | m_drsp.valid = true; |
---|
| 3761 | } |
---|
| 3762 | else |
---|
| 3763 | { |
---|
| 3764 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 3765 | m_drsp.valid = true; |
---|
| 3766 | } |
---|
| 3767 | |
---|
| 3768 | #if DEBUG_DCACHE |
---|
| 3769 | if ( m_debug_dcache_fsm ) |
---|
| 3770 | { |
---|
| 3771 | std::cout << " <PROC " << name() |
---|
| 3772 | << " DCACHE_XTN_DC_INVAL_GO> Actual dcache inval" << std::hex |
---|
| 3773 | << " / PADDR = " << r_dcache_save_paddr.read() << std::endl; |
---|
| 3774 | } |
---|
| 3775 | #endif |
---|
| 3776 | } |
---|
| 3777 | break; |
---|
| 3778 | } |
---|
| 3779 | ////////////////////////////// |
---|
| 3780 | case DCACHE_XTN_DC_INVAL_END: // send response to processor XTN request |
---|
| 3781 | { |
---|
| 3782 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 3783 | m_drsp.valid = true; |
---|
| 3784 | break; |
---|
| 3785 | } |
---|
| 3786 | //////////////////////// |
---|
| 3787 | case DCACHE_MISS_SELECT: // Try to select a slot in associative set |
---|
| 3788 | // if previous cleanup has been sent. |
---|
| 3789 | // Waiting in this state if no slot available |
---|
| 3790 | // Set the r_dcache_cleanup_req flip-flop |
---|
| 3791 | // and the r_dcache_miss_clack flip-flop |
---|
| 3792 | // when a cleanup is required |
---|
| 3793 | { |
---|
| 3794 | if ( m_dreq.valid) m_cost_data_miss_frz++; |
---|
| 3795 | |
---|
| 3796 | // coherence request (from CC_RECEIVE FSM) |
---|
| 3797 | if ( r_cc_receive_dcache_req.read() ) |
---|
| 3798 | { |
---|
| 3799 | r_dcache_fsm = DCACHE_CC_CHECK; |
---|
| 3800 | r_dcache_fsm_cc_save = r_dcache_fsm.read(); |
---|
| 3801 | break; |
---|
| 3802 | } |
---|
| 3803 | |
---|
| 3804 | if ( not r_dcache_cc_send_req.read() ) // blocked until previous cc_send request is sent |
---|
| 3805 | { |
---|
| 3806 | bool found; |
---|
| 3807 | bool cleanup; |
---|
| 3808 | size_t way; |
---|
| 3809 | size_t set; |
---|
| 3810 | paddr_t victim; |
---|
| 3811 | |
---|
| 3812 | #ifdef INSTRUMENTATION |
---|
| 3813 | m_cpt_dcache_dir_read++; |
---|
| 3814 | #endif |
---|
| 3815 | r_dcache.read_select( r_dcache_save_paddr.read(), |
---|
| 3816 | &victim, |
---|
| 3817 | &way, |
---|
| 3818 | &set, |
---|
| 3819 | &found, |
---|
| 3820 | &cleanup ); |
---|
[355] | 3821 | |
---|
[331] | 3822 | if ( found ) |
---|
| 3823 | { |
---|
| 3824 | r_dcache_miss_way = way; |
---|
| 3825 | r_dcache_miss_set = set; |
---|
| 3826 | |
---|
| 3827 | if ( cleanup ) |
---|
| 3828 | { |
---|
| 3829 | r_dcache_miss_clack = true; |
---|
| 3830 | r_dcache_fsm = DCACHE_MISS_CLEAN; |
---|
| 3831 | // request cleanup |
---|
| 3832 | r_dcache_cc_send_req = true; |
---|
| 3833 | r_dcache_cc_send_nline = victim; |
---|
| 3834 | r_dcache_cc_send_way = way; |
---|
| 3835 | r_dcache_cc_send_type = CC_TYPE_CLEANUP; |
---|
| 3836 | } |
---|
| 3837 | else |
---|
| 3838 | { |
---|
| 3839 | r_dcache_fsm = DCACHE_MISS_WAIT; |
---|
| 3840 | } |
---|
| 3841 | |
---|
| 3842 | #if DEBUG_DCACHE |
---|
| 3843 | if ( m_debug_dcache_fsm ) |
---|
| 3844 | { |
---|
| 3845 | std::cout << " <PROC " << name() |
---|
| 3846 | << " DCACHE_MISS_SELECT> Select a slot:" << std::dec |
---|
| 3847 | << " / WAY = " << way |
---|
| 3848 | << " / SET = " << set |
---|
| 3849 | << " / PADDR = " << std::hex << r_dcache_save_paddr.read(); |
---|
| 3850 | if(cleanup) std::cout << " / VICTIM = " << std::hex << victim << std::endl; |
---|
| 3851 | else std::cout << std::endl; |
---|
| 3852 | } |
---|
| 3853 | #endif |
---|
| 3854 | } // end found |
---|
| 3855 | } |
---|
| 3856 | break; |
---|
| 3857 | } |
---|
| 3858 | /////////////////////// |
---|
| 3859 | case DCACHE_MISS_CLEAN: // switch the slot to ZOMBI state |
---|
| 3860 | // and possibly request itlb or dtlb invalidate |
---|
| 3861 | { |
---|
| 3862 | if ( m_dreq.valid) m_cost_data_miss_frz++; |
---|
| 3863 | |
---|
| 3864 | size_t way = r_dcache_miss_way.read(); |
---|
| 3865 | size_t set = r_dcache_miss_set.read(); |
---|
| 3866 | paddr_t nline = r_dcache_save_paddr.read() / (m_dcache_words<<2); |
---|
| 3867 | |
---|
| 3868 | #ifdef INSTRUMENTATION |
---|
| 3869 | m_cpt_dcache_dir_read++; |
---|
| 3870 | #endif |
---|
[366] | 3871 | r_dcache.write_dir( way, |
---|
[331] | 3872 | set, |
---|
| 3873 | CACHE_SLOT_STATE_ZOMBI ); |
---|
| 3874 | #if DEBUG_DCACHE |
---|
| 3875 | if ( m_debug_dcache_fsm ) |
---|
| 3876 | { |
---|
| 3877 | std::cout << " <PROC " << name() |
---|
| 3878 | << " DCACHE_MISS_CLEAN> Switch to ZOMBI state" << std::dec |
---|
| 3879 | << " / way = " << way |
---|
| 3880 | << " / set = " << set << std::endl; |
---|
| 3881 | } |
---|
| 3882 | #endif |
---|
| 3883 | // if selective itlb & dtlb invalidate are required |
---|
| 3884 | // the miss response is not handled before invalidate completed |
---|
| 3885 | if ( r_dcache_in_tlb[way*m_dcache_sets+set] ) |
---|
| 3886 | { |
---|
| 3887 | r_dcache_in_tlb[way*m_dcache_sets+set] = false; |
---|
| 3888 | r_dcache_tlb_inval_line = nline; |
---|
| 3889 | r_dcache_tlb_inval_set = 0; |
---|
| 3890 | r_dcache_fsm_scan_save = DCACHE_MISS_WAIT; |
---|
| 3891 | r_dcache_fsm = DCACHE_INVAL_TLB_SCAN; |
---|
| 3892 | } |
---|
| 3893 | else if ( r_dcache_contains_ptd[way*m_dcache_sets+set] ) |
---|
| 3894 | { |
---|
| 3895 | r_itlb.reset(); |
---|
| 3896 | r_dtlb.reset(); |
---|
| 3897 | r_dcache_contains_ptd[way*m_dcache_sets+set] = false; |
---|
| 3898 | r_dcache_fsm = DCACHE_MISS_WAIT; |
---|
| 3899 | } |
---|
| 3900 | else |
---|
| 3901 | { |
---|
| 3902 | r_dcache_fsm = DCACHE_MISS_WAIT; |
---|
| 3903 | } |
---|
| 3904 | break; |
---|
| 3905 | } |
---|
| 3906 | ////////////////////// |
---|
| 3907 | case DCACHE_MISS_WAIT: // waiting the response to a miss request from VCI_RSP FSM |
---|
| 3908 | // This state is in charge of error signaling |
---|
| 3909 | // There is 5 types of error depending on the requester |
---|
| 3910 | { |
---|
| 3911 | if ( m_dreq.valid) m_cost_data_miss_frz++; |
---|
| 3912 | |
---|
| 3913 | // coherence request (from CC_RECEIVE FSM) |
---|
| 3914 | if ( r_cc_receive_dcache_req.read() ) |
---|
| 3915 | { |
---|
| 3916 | r_dcache_fsm = DCACHE_CC_CHECK; |
---|
| 3917 | r_dcache_fsm_cc_save = r_dcache_fsm.read(); |
---|
| 3918 | break; |
---|
| 3919 | } |
---|
| 3920 | |
---|
| 3921 | if ( r_vci_rsp_data_error.read() ) // bus error |
---|
| 3922 | { |
---|
| 3923 | switch ( r_dcache_miss_type.read() ) |
---|
| 3924 | { |
---|
| 3925 | case PROC_MISS: |
---|
| 3926 | { |
---|
| 3927 | r_mmu_detr = MMU_READ_DATA_ILLEGAL_ACCESS; |
---|
| 3928 | r_mmu_dbvar = r_dcache_save_vaddr.read(); |
---|
| 3929 | m_drsp.valid = true; |
---|
| 3930 | m_drsp.error = true; |
---|
| 3931 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 3932 | break; |
---|
| 3933 | } |
---|
| 3934 | case PTE1_MISS: |
---|
| 3935 | { |
---|
| 3936 | if ( r_dcache_tlb_ins.read() ) |
---|
| 3937 | { |
---|
| 3938 | r_mmu_ietr = MMU_READ_PT1_ILLEGAL_ACCESS; |
---|
| 3939 | r_mmu_ibvar = r_dcache_tlb_vaddr.read(); |
---|
| 3940 | r_icache_tlb_miss_req = false; |
---|
| 3941 | r_icache_tlb_rsp_error = true; |
---|
| 3942 | } |
---|
| 3943 | else |
---|
| 3944 | { |
---|
| 3945 | r_mmu_detr = MMU_READ_PT1_ILLEGAL_ACCESS; |
---|
| 3946 | r_mmu_dbvar = r_dcache_tlb_vaddr.read(); |
---|
| 3947 | m_drsp.valid = true; |
---|
| 3948 | m_drsp.error = true; |
---|
| 3949 | } |
---|
| 3950 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 3951 | break; |
---|
| 3952 | } |
---|
| 3953 | case PTE2_MISS: |
---|
| 3954 | { |
---|
| 3955 | if ( r_dcache_tlb_ins.read() ) |
---|
| 3956 | { |
---|
| 3957 | r_mmu_ietr = MMU_READ_PT2_ILLEGAL_ACCESS; |
---|
| 3958 | r_mmu_ibvar = r_dcache_tlb_vaddr.read(); |
---|
| 3959 | r_icache_tlb_miss_req = false; |
---|
| 3960 | r_icache_tlb_rsp_error = true; |
---|
| 3961 | } |
---|
| 3962 | else |
---|
| 3963 | { |
---|
| 3964 | r_mmu_detr = MMU_READ_PT2_ILLEGAL_ACCESS; |
---|
| 3965 | r_mmu_dbvar = r_dcache_tlb_vaddr.read(); |
---|
| 3966 | m_drsp.valid = true; |
---|
| 3967 | m_drsp.error = true; |
---|
| 3968 | } |
---|
| 3969 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 3970 | break; |
---|
| 3971 | } |
---|
| 3972 | } // end switch type |
---|
| 3973 | r_vci_rsp_data_error = false; |
---|
| 3974 | } |
---|
| 3975 | else if ( r_vci_rsp_fifo_dcache.rok() ) // valid response available |
---|
| 3976 | { |
---|
| 3977 | r_dcache_miss_word = 0; |
---|
| 3978 | r_dcache_fsm = DCACHE_MISS_DATA_UPDT; |
---|
| 3979 | } |
---|
| 3980 | break; |
---|
| 3981 | } |
---|
| 3982 | ////////////////////////// |
---|
| 3983 | case DCACHE_MISS_DATA_UPDT: // update the dcache (one word per cycle) |
---|
| 3984 | { |
---|
| 3985 | if ( m_dreq.valid) m_cost_data_miss_frz++; |
---|
| 3986 | |
---|
| 3987 | if ( r_vci_rsp_fifo_dcache.rok() ) // one word available |
---|
| 3988 | { |
---|
| 3989 | #ifdef INSTRUMENTATION |
---|
| 3990 | m_cpt_dcache_data_write++; |
---|
| 3991 | #endif |
---|
| 3992 | r_dcache.write( r_dcache_miss_way.read(), |
---|
| 3993 | r_dcache_miss_set.read(), |
---|
| 3994 | r_dcache_miss_word.read(), |
---|
| 3995 | r_vci_rsp_fifo_dcache.read() ); |
---|
| 3996 | #if DEBUG_DCACHE |
---|
| 3997 | if ( m_debug_dcache_fsm ) |
---|
| 3998 | { |
---|
| 3999 | std::cout << " <PROC " << name() |
---|
| 4000 | << " DCACHE_MISS_DATA_UPDT> Write one word:" |
---|
| 4001 | << " / DATA = " << r_vci_rsp_fifo_dcache.read() |
---|
| 4002 | << " / WAY = " << std::dec << r_dcache_miss_way.read() |
---|
| 4003 | << " / SET = " << r_dcache_miss_set.read() |
---|
| 4004 | << " / WORD = " << r_dcache_miss_word.read() << std::endl; |
---|
| 4005 | } |
---|
| 4006 | #endif |
---|
| 4007 | vci_rsp_fifo_dcache_get = true; |
---|
| 4008 | r_dcache_miss_word = r_dcache_miss_word.read() + 1; |
---|
| 4009 | |
---|
| 4010 | if ( r_dcache_miss_word.read() == (m_dcache_words-1) ) // last word |
---|
| 4011 | { |
---|
| 4012 | r_dcache_fsm = DCACHE_MISS_DIR_UPDT; |
---|
| 4013 | } |
---|
| 4014 | } |
---|
| 4015 | break; |
---|
| 4016 | } |
---|
| 4017 | ////////////////////////// |
---|
| 4018 | case DCACHE_MISS_DIR_UPDT: // Stalled if a victim line has been evicted |
---|
| 4019 | // and the cleanup ack has not been received, |
---|
| 4020 | // as indicated by the r_dcache_miss clack. |
---|
| 4021 | // - If no matching coherence request (r_dcache_inval_miss) |
---|
| 4022 | // switch directory slot to VALID state. |
---|
| 4023 | // - If matching coherence request, switch directory slot |
---|
| 4024 | // to ZOMBI state, and send a cleanup request. |
---|
| 4025 | { |
---|
| 4026 | if ( m_dreq.valid) m_cost_data_miss_frz++; |
---|
| 4027 | |
---|
| 4028 | // coherence request (from CC_RECEIVE FSM) |
---|
| 4029 | if ( r_cc_receive_dcache_req.read() ) |
---|
| 4030 | { |
---|
| 4031 | r_dcache_fsm = DCACHE_CC_CHECK; |
---|
| 4032 | r_dcache_fsm_cc_save = r_dcache_fsm.read(); |
---|
| 4033 | break; |
---|
| 4034 | } |
---|
| 4035 | |
---|
| 4036 | if ( not r_dcache_miss_clack.read() ) // waiting cleanup acknowledge |
---|
| 4037 | { |
---|
| 4038 | if ( r_dcache_miss_inval.read() ) // switch slot to ZOMBI state, and new cleanup |
---|
| 4039 | { |
---|
| 4040 | if ( not r_dcache_cc_send_req.read() ) // blocked until previous cc_send request is sent |
---|
| 4041 | { |
---|
| 4042 | r_dcache_miss_inval = false; |
---|
| 4043 | // request cleanup |
---|
| 4044 | r_dcache_cc_send_req = true; |
---|
| 4045 | r_dcache_cc_send_nline = r_dcache_save_paddr.read()/(m_dcache_words<<2); |
---|
| 4046 | r_dcache_cc_send_way = r_dcache_miss_way.read(); |
---|
| 4047 | r_dcache_cc_send_type = CC_TYPE_CLEANUP; |
---|
| 4048 | |
---|
| 4049 | #ifdef INSTRUMENTATION |
---|
| 4050 | m_cpt_dcache_dir_write++; |
---|
| 4051 | #endif |
---|
| 4052 | r_dcache.write_dir( r_dcache_save_paddr.read(), |
---|
| 4053 | r_dcache_miss_way.read(), |
---|
| 4054 | r_dcache_miss_set.read(), |
---|
| 4055 | CACHE_SLOT_STATE_ZOMBI ); |
---|
| 4056 | #if DEBUG_DCACHE |
---|
| 4057 | if ( m_debug_dcache_fsm ) |
---|
| 4058 | { |
---|
| 4059 | std::cout << " <PROC " << name() |
---|
| 4060 | << " DCACHE_MISS_DIR_UPDT> Switch slot to ZOMBI state" |
---|
| 4061 | << " PADDR = " << std::hex << r_dcache_save_paddr.read() |
---|
| 4062 | << " / WAY = " << std::dec << r_dcache_miss_way.read() |
---|
| 4063 | << " / SET = " << r_dcache_miss_set.read() << std::endl; |
---|
| 4064 | } |
---|
| 4065 | #endif |
---|
| 4066 | } |
---|
| 4067 | else |
---|
| 4068 | break; |
---|
| 4069 | } |
---|
| 4070 | else // switch slot to VALID state |
---|
| 4071 | { |
---|
| 4072 | |
---|
| 4073 | #ifdef INSTRUMENTATION |
---|
| 4074 | m_cpt_dcache_dir_write++; |
---|
| 4075 | #endif |
---|
| 4076 | r_dcache.write_dir( r_dcache_save_paddr.read(), |
---|
| 4077 | r_dcache_miss_way.read(), |
---|
| 4078 | r_dcache_miss_set.read(), |
---|
| 4079 | CACHE_SLOT_STATE_VALID ); |
---|
| 4080 | |
---|
| 4081 | #if DEBUG_DCACHE |
---|
| 4082 | if ( m_debug_dcache_fsm ) |
---|
| 4083 | { |
---|
| 4084 | std::cout << " <PROC " << name() |
---|
| 4085 | << " DCACHE_MISS_DIR_UPDT> Switch slot to VALID state" |
---|
| 4086 | << " PADDR = " << std::hex << r_dcache_save_paddr.read() |
---|
| 4087 | << " / WAY = " << std::dec << r_dcache_miss_way.read() |
---|
| 4088 | << " / SET = " << r_dcache_miss_set.read() << std::endl; |
---|
| 4089 | |
---|
| 4090 | r_dcache.printTrace(); |
---|
| 4091 | |
---|
| 4092 | |
---|
| 4093 | } |
---|
| 4094 | #endif |
---|
| 4095 | // reset directory extension |
---|
| 4096 | size_t way = r_dcache_miss_way.read(); |
---|
| 4097 | size_t set = r_dcache_miss_set.read(); |
---|
| 4098 | r_dcache_in_tlb[way*m_dcache_sets+set] = false; |
---|
| 4099 | r_dcache_contains_ptd[way*m_dcache_sets+set] = false; |
---|
| 4100 | } |
---|
| 4101 | if (r_dcache_miss_type.read()==PTE1_MISS) r_dcache_fsm = DCACHE_TLB_PTE1_GET; |
---|
| 4102 | else if (r_dcache_miss_type.read()==PTE2_MISS) r_dcache_fsm = DCACHE_TLB_PTE2_GET; |
---|
| 4103 | else r_dcache_fsm = DCACHE_IDLE; |
---|
| 4104 | } |
---|
| 4105 | break; |
---|
| 4106 | } |
---|
| 4107 | ///////////////////// |
---|
| 4108 | case DCACHE_UNC_WAIT: // waiting a response to an uncacheable read |
---|
| 4109 | { |
---|
| 4110 | // coherence request (from CC_RECEIVE FSM) |
---|
| 4111 | if ( r_cc_receive_dcache_req.read() ) |
---|
| 4112 | { |
---|
| 4113 | r_dcache_fsm = DCACHE_CC_CHECK; |
---|
| 4114 | r_dcache_fsm_cc_save = r_dcache_fsm.read(); |
---|
| 4115 | break; |
---|
| 4116 | } |
---|
| 4117 | |
---|
| 4118 | if ( r_vci_rsp_data_error.read() ) // bus error |
---|
| 4119 | { |
---|
| 4120 | r_mmu_detr = MMU_READ_DATA_ILLEGAL_ACCESS; |
---|
| 4121 | r_mmu_dbvar = m_dreq.addr; |
---|
| 4122 | r_vci_rsp_data_error = false; |
---|
| 4123 | m_drsp.error = true; |
---|
| 4124 | m_drsp.valid = true; |
---|
| 4125 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 4126 | break; |
---|
| 4127 | } |
---|
| 4128 | else if ( r_vci_rsp_fifo_dcache.rok() ) // data available |
---|
| 4129 | { |
---|
| 4130 | // consume data |
---|
| 4131 | vci_rsp_fifo_dcache_get = true; |
---|
| 4132 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 4133 | |
---|
| 4134 | // acknowledge the processor request if it has not been modified |
---|
| 4135 | if ( m_dreq.valid and (m_dreq.addr == r_dcache_save_vaddr.read()) ) |
---|
| 4136 | { |
---|
| 4137 | m_drsp.valid = true; |
---|
| 4138 | m_drsp.error = false; |
---|
| 4139 | m_drsp.rdata = r_vci_rsp_fifo_dcache.read(); |
---|
| 4140 | } |
---|
| 4141 | } |
---|
| 4142 | break; |
---|
| 4143 | } |
---|
| 4144 | ///////////////////// |
---|
| 4145 | case DCACHE_LL_WAIT: // waiting VCI response to a LL transaction |
---|
| 4146 | { |
---|
| 4147 | // coherence request (from CC_RECEIVE FSM) |
---|
| 4148 | if ( r_cc_receive_dcache_req.read() ) |
---|
| 4149 | { |
---|
| 4150 | r_dcache_fsm = DCACHE_CC_CHECK; |
---|
| 4151 | r_dcache_fsm_cc_save = r_dcache_fsm.read(); |
---|
| 4152 | break; |
---|
| 4153 | } |
---|
| 4154 | |
---|
| 4155 | if ( r_vci_rsp_data_error.read() ) // bus error |
---|
| 4156 | { |
---|
| 4157 | r_mmu_detr = MMU_READ_DATA_ILLEGAL_ACCESS; |
---|
| 4158 | r_mmu_dbvar = m_dreq.addr; |
---|
| 4159 | r_vci_rsp_data_error = false; |
---|
| 4160 | m_drsp.error = true; |
---|
| 4161 | m_drsp.valid = true; |
---|
| 4162 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 4163 | break; |
---|
| 4164 | } |
---|
| 4165 | else if ( r_vci_rsp_fifo_dcache.rok() ) // data available |
---|
| 4166 | { |
---|
| 4167 | // consume data |
---|
| 4168 | vci_rsp_fifo_dcache_get = true; |
---|
| 4169 | |
---|
| 4170 | if(r_dcache_ll_rsp_count.read() == 0) // first flit |
---|
| 4171 | { |
---|
| 4172 | // set key value in llsc reservation buffer |
---|
| 4173 | r_dcache_llsc_key = r_vci_rsp_fifo_dcache.read(); |
---|
| 4174 | r_dcache_ll_rsp_count = r_dcache_ll_rsp_count.read() + 1 ; |
---|
| 4175 | } |
---|
| 4176 | else // last flit |
---|
| 4177 | { |
---|
| 4178 | // acknowledge the processor request if it has not been modified |
---|
| 4179 | if ( m_dreq.valid and (m_dreq.addr == r_dcache_save_vaddr.read()) ) |
---|
| 4180 | { |
---|
| 4181 | m_drsp.valid = true; |
---|
| 4182 | m_drsp.error = false; |
---|
| 4183 | m_drsp.rdata = r_vci_rsp_fifo_dcache.read(); |
---|
| 4184 | } |
---|
| 4185 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 4186 | } |
---|
| 4187 | } |
---|
| 4188 | break; |
---|
| 4189 | } |
---|
| 4190 | //////////////////// |
---|
| 4191 | case DCACHE_SC_WAIT: // waiting VCI response to a SC transaction |
---|
| 4192 | { |
---|
| 4193 | // coherence request (from CC_RECEIVE FSM) |
---|
| 4194 | if ( r_cc_receive_dcache_req.read() ) |
---|
| 4195 | { |
---|
| 4196 | r_dcache_fsm = DCACHE_CC_CHECK; |
---|
| 4197 | r_dcache_fsm_cc_save = r_dcache_fsm.read(); |
---|
| 4198 | break; |
---|
| 4199 | } |
---|
| 4200 | |
---|
| 4201 | if ( r_vci_rsp_data_error.read() ) // bus error |
---|
| 4202 | { |
---|
| 4203 | r_mmu_detr = MMU_READ_DATA_ILLEGAL_ACCESS; |
---|
| 4204 | r_mmu_dbvar = m_dreq.addr; |
---|
| 4205 | r_vci_rsp_data_error = false; |
---|
| 4206 | m_drsp.error = true; |
---|
| 4207 | m_drsp.valid = true; |
---|
| 4208 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 4209 | break; |
---|
| 4210 | } |
---|
| 4211 | else if ( r_vci_rsp_fifo_dcache.rok() ) // response available |
---|
| 4212 | { |
---|
| 4213 | // consume response |
---|
| 4214 | vci_rsp_fifo_dcache_get = true; |
---|
| 4215 | m_drsp.valid = true; |
---|
| 4216 | m_drsp.rdata = r_vci_rsp_fifo_dcache.read(); |
---|
| 4217 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 4218 | } |
---|
| 4219 | break; |
---|
| 4220 | } |
---|
| 4221 | ////////////////////////// |
---|
| 4222 | case DCACHE_DIRTY_GET_PTE: // This sub_fsm set the PTE Dirty bit in memory |
---|
| 4223 | // before handling a processor WRITE or SC request |
---|
| 4224 | // Input argument is r_dcache_dirty_paddr |
---|
| 4225 | // In this first state, we get PTE value in dcache |
---|
| 4226 | // and post a CAS request to CMD FSM |
---|
| 4227 | { |
---|
| 4228 | // get PTE in dcache |
---|
| 4229 | uint32_t pte; |
---|
| 4230 | size_t way; |
---|
| 4231 | size_t set; |
---|
| 4232 | size_t word; // unused |
---|
| 4233 | int state; |
---|
| 4234 | |
---|
| 4235 | #ifdef INSTRUMENTATION |
---|
| 4236 | m_cpt_dcache_data_read++; |
---|
| 4237 | m_cpt_dcache_dir_read++; |
---|
| 4238 | #endif |
---|
| 4239 | r_dcache.read( r_dcache_dirty_paddr.read(), |
---|
| 4240 | &pte, |
---|
| 4241 | &way, |
---|
| 4242 | &set, |
---|
| 4243 | &word, |
---|
| 4244 | &state ); |
---|
| 4245 | |
---|
| 4246 | assert( (state == CACHE_SLOT_STATE_VALID) and |
---|
| 4247 | "error in DCACHE_DIRTY_TLB_SET: the PTE should be in dcache" ); |
---|
| 4248 | |
---|
| 4249 | // request CAS transaction to CMD_FSM |
---|
| 4250 | r_dcache_dirty_way = way; |
---|
| 4251 | r_dcache_dirty_set = set; |
---|
| 4252 | |
---|
| 4253 | // check llsc reservation buffer |
---|
| 4254 | if (r_dcache_llsc_paddr.read() == r_dcache_dirty_paddr.read() ) |
---|
| 4255 | r_dcache_llsc_valid = false; |
---|
| 4256 | |
---|
| 4257 | // request a CAS CMD and go to DCACHE_DIRTY_WAIT state |
---|
| 4258 | r_dcache_vci_cas_req = true; |
---|
| 4259 | r_dcache_vci_paddr = r_dcache_dirty_paddr.read(); |
---|
| 4260 | r_dcache_vci_cas_old = pte; |
---|
| 4261 | r_dcache_vci_cas_new = pte | PTE_D_MASK; |
---|
| 4262 | r_dcache_fsm = DCACHE_DIRTY_WAIT; |
---|
| 4263 | |
---|
| 4264 | #if DEBUG_DCACHE |
---|
| 4265 | if ( m_debug_dcache_fsm ) |
---|
| 4266 | { |
---|
| 4267 | std::cout << " <PROC " << name() |
---|
| 4268 | << " DCACHE_DIRTY_GET_PTE> CAS request" << std::hex |
---|
| 4269 | << " / PTE_PADDR = " << r_dcache_dirty_paddr.read() |
---|
| 4270 | << " / PTE_VALUE = " << pte << std::dec |
---|
| 4271 | << " / SET = " << set |
---|
| 4272 | << " / WAY = " << way << std::endl; |
---|
| 4273 | } |
---|
| 4274 | #endif |
---|
| 4275 | break; |
---|
| 4276 | } |
---|
| 4277 | /////////////////////// |
---|
| 4278 | case DCACHE_DIRTY_WAIT: // wait completion of CAS for PTE Dirty bit, |
---|
| 4279 | // and return to IDLE state when response is received. |
---|
| 4280 | // we don't care if the CAS is a failure: |
---|
| 4281 | // - if the CAS is a success, the coherence mechanism |
---|
| 4282 | // updates the local copy. |
---|
| 4283 | // - if the CAS is a failure, we just retry the write. |
---|
| 4284 | { |
---|
| 4285 | // coherence request (from CC_RECEIVE FSM) |
---|
| 4286 | if ( r_cc_receive_dcache_req.read() ) |
---|
| 4287 | { |
---|
| 4288 | r_dcache_fsm = DCACHE_CC_CHECK; |
---|
| 4289 | r_dcache_fsm_cc_save = r_dcache_fsm.read(); |
---|
| 4290 | break; |
---|
| 4291 | } |
---|
| 4292 | |
---|
| 4293 | if ( r_vci_rsp_data_error.read() ) // bus error |
---|
| 4294 | { |
---|
| 4295 | std::cout << "BUS ERROR in DCACHE_DIRTY_WAIT state" << std::endl; |
---|
| 4296 | std::cout << "This should not happen in this state" << std::endl; |
---|
| 4297 | exit(0); |
---|
| 4298 | } |
---|
| 4299 | else if ( r_vci_rsp_fifo_dcache.rok() ) // response available |
---|
| 4300 | { |
---|
| 4301 | vci_rsp_fifo_dcache_get = true; |
---|
| 4302 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 4303 | |
---|
| 4304 | #if DEBUG_DCACHE |
---|
| 4305 | if ( m_debug_dcache_fsm ) |
---|
| 4306 | { |
---|
| 4307 | std::cout << " <PROC " << name() |
---|
| 4308 | << " DCACHE_DIRTY_WAIT> CAS completed" << std::endl; |
---|
| 4309 | } |
---|
| 4310 | #endif |
---|
| 4311 | } |
---|
| 4312 | break; |
---|
| 4313 | } |
---|
| 4314 | ///////////////////// |
---|
| 4315 | case DCACHE_CC_CHECK: // This state is the entry point for the sub-FSM |
---|
| 4316 | // handling coherence requests for DCACHE. |
---|
| 4317 | // If there is a matching pending miss on the modified cache |
---|
| 4318 | // line this is signaled in the r_dcache_miss inval flip-flop. |
---|
| 4319 | // If the updated (or invalidated) cache line has copies in TLBs |
---|
| 4320 | // these TLB copies are invalidated. |
---|
| 4321 | // The return state is defined in r_dcache_fsm_cc_save |
---|
| 4322 | { |
---|
| 4323 | paddr_t paddr = r_cc_receive_dcache_nline.read() * m_dcache_words * 4; |
---|
| 4324 | paddr_t mask = ~((m_dcache_words<<2)-1); |
---|
| 4325 | |
---|
| 4326 | #if DEBUG_DCACHE |
---|
| 4327 | if ( m_debug_dcache_fsm ) |
---|
| 4328 | { |
---|
| 4329 | std::cout << " <PROC " << name() |
---|
| 4330 | << " DCACHE_CC_CHECK> paddr = " << paddr |
---|
| 4331 | << " r_dcache_vci_paddr = " << r_dcache_vci_paddr.read() |
---|
| 4332 | << " mask = " << mask |
---|
| 4333 | << " (r_dcache_fsm_cc_save == DCACHE_MISS_WAIT) = " << (r_dcache_fsm_cc_save == DCACHE_MISS_WAIT) |
---|
| 4334 | << " (r_dcache_fsm_cc_save == DCACHE_MISS_DIR_UPDT) = " << (r_dcache_fsm_cc_save == DCACHE_MISS_DIR_UPDT) |
---|
| 4335 | << " ((r_dcache_vci_paddr.read() & mask) == (paddr & mask)) = " << ((r_dcache_vci_paddr.read() & mask) == (paddr & mask)) |
---|
| 4336 | <<std::endl; |
---|
| 4337 | } |
---|
| 4338 | #endif |
---|
| 4339 | |
---|
| 4340 | if (r_cc_receive_dcache_type.read() == CC_TYPE_CLACK) |
---|
| 4341 | // We switch the directory slot to EMPTY state |
---|
| 4342 | // and reset r_icache_miss_clack if the cleanup ack |
---|
| 4343 | // is matching a pending miss. |
---|
| 4344 | { |
---|
| 4345 | |
---|
| 4346 | if ( m_dreq.valid ) m_cost_data_miss_frz++; |
---|
| 4347 | |
---|
| 4348 | #ifdef INSTRUMENTATION |
---|
| 4349 | m_cpt_dcache_dir_write++; |
---|
| 4350 | #endif |
---|
| 4351 | r_dcache.write_dir( 0, |
---|
| 4352 | r_cc_receive_dcache_way.read(), |
---|
| 4353 | r_cc_receive_dcache_set.read(), |
---|
| 4354 | CACHE_SLOT_STATE_EMPTY); |
---|
| 4355 | |
---|
| 4356 | if ( (r_dcache_miss_set.read() == r_cc_receive_dcache_set.read()) and |
---|
| 4357 | (r_dcache_miss_way.read() == r_cc_receive_dcache_way.read()) ) |
---|
| 4358 | r_dcache_miss_clack = false; |
---|
| 4359 | |
---|
| 4360 | r_dcache_fsm = r_dcache_fsm_cc_save.read() ; |
---|
| 4361 | r_cc_receive_dcache_req = false; |
---|
| 4362 | #if DEBUG_DCACHE |
---|
| 4363 | if ( m_debug_dcache_fsm ) |
---|
| 4364 | { |
---|
| 4365 | std::cout << " <PROC " << name() |
---|
| 4366 | << " DCACHE_CC_CHECK> CC_TYPE_CLACK Switch slot to EMPTY state" |
---|
| 4367 | << " set = " << r_cc_receive_dcache_set.read() |
---|
| 4368 | << " / way = " << r_cc_receive_dcache_way.read() << std::endl; |
---|
| 4369 | } |
---|
| 4370 | #endif |
---|
| 4371 | } |
---|
[355] | 4372 | else if( ((r_dcache_fsm_cc_save == DCACHE_MISS_SELECT) or |
---|
| 4373 | (r_dcache_fsm_cc_save == DCACHE_MISS_WAIT) or |
---|
[331] | 4374 | (r_dcache_fsm_cc_save == DCACHE_MISS_DIR_UPDT)) and |
---|
| 4375 | ((r_dcache_vci_paddr.read() & mask) == (paddr & mask)) ) // matching |
---|
| 4376 | { |
---|
| 4377 | // signaling matching |
---|
| 4378 | r_dcache_miss_inval = true; |
---|
| 4379 | |
---|
| 4380 | // in case of update, go to CC_UPDT |
---|
| 4381 | // JUST TO POP THE FIFO |
---|
| 4382 | if (r_cc_receive_dcache_type.read() == CC_TYPE_UPDT) |
---|
| 4383 | { |
---|
| 4384 | r_dcache_fsm = DCACHE_CC_UPDT; |
---|
| 4385 | r_dcache_cc_word = r_cc_receive_word_idx.read(); |
---|
| 4386 | // just pop the fifo , don't write in icache |
---|
| 4387 | r_dcache_cc_need_write = false; |
---|
| 4388 | } |
---|
| 4389 | // the request is dealt with |
---|
| 4390 | else |
---|
| 4391 | { |
---|
| 4392 | r_cc_receive_dcache_req = false; |
---|
| 4393 | r_dcache_fsm = r_dcache_fsm_cc_save.read(); |
---|
| 4394 | } |
---|
| 4395 | |
---|
| 4396 | #if DEBUG_DCACHE |
---|
| 4397 | if ( m_debug_dcache_fsm ) |
---|
| 4398 | { |
---|
| 4399 | std::cout << " <PROC " << name() |
---|
| 4400 | << " DCACHE_CC_CHECK> Coherence request matching a pending miss:" |
---|
| 4401 | << " PADDR = " << std::hex << paddr << std::endl; |
---|
| 4402 | } |
---|
| 4403 | #endif |
---|
| 4404 | |
---|
| 4405 | } |
---|
| 4406 | else // no match |
---|
| 4407 | { |
---|
| 4408 | int state; |
---|
| 4409 | size_t way; |
---|
| 4410 | size_t set; |
---|
| 4411 | size_t word; |
---|
| 4412 | |
---|
| 4413 | #ifdef INSTRUMENTATION |
---|
| 4414 | m_cpt_dcache_dir_read++; |
---|
| 4415 | #endif |
---|
| 4416 | r_dcache.read_dir( paddr, |
---|
| 4417 | &state, |
---|
| 4418 | &way, |
---|
| 4419 | &set, |
---|
| 4420 | &word ); // unused |
---|
| 4421 | |
---|
| 4422 | r_dcache_cc_way = way; |
---|
| 4423 | r_dcache_cc_set = set; |
---|
| 4424 | |
---|
| 4425 | if ( state == CACHE_SLOT_STATE_VALID) // hit |
---|
| 4426 | { |
---|
| 4427 | // need to update the cache state |
---|
| 4428 | r_dcache_cc_need_write = true; |
---|
| 4429 | if (r_cc_receive_dcache_type.read() == CC_TYPE_UPDT) // hit update |
---|
| 4430 | { |
---|
| 4431 | r_dcache_fsm = DCACHE_CC_UPDT; |
---|
| 4432 | r_dcache_cc_word = r_cc_receive_word_idx.read(); |
---|
| 4433 | } |
---|
| 4434 | else if (r_cc_receive_dcache_type.read() == CC_TYPE_INVAL) // hit inval |
---|
| 4435 | { |
---|
| 4436 | r_dcache_fsm = DCACHE_CC_INVAL; |
---|
| 4437 | } |
---|
| 4438 | else if ( r_cc_receive_dcache_type.read() == CC_TYPE_BRDCAST) // hit broadcast |
---|
| 4439 | { |
---|
| 4440 | r_dcache_fsm = DCACHE_CC_BROADCAST; |
---|
| 4441 | } |
---|
| 4442 | } |
---|
| 4443 | else // miss |
---|
| 4444 | { |
---|
| 4445 | // multicast acknowledgement required in case of update |
---|
| 4446 | if(r_cc_receive_dcache_type.read() == CC_TYPE_UPDT) |
---|
| 4447 | { |
---|
| 4448 | r_dcache_fsm = DCACHE_CC_UPDT; |
---|
| 4449 | r_dcache_cc_word = r_cc_receive_word_idx.read(); |
---|
| 4450 | // just pop the fifo , don't write in icache |
---|
| 4451 | r_dcache_cc_need_write = false; |
---|
| 4452 | } |
---|
| 4453 | else // No response needed |
---|
| 4454 | { |
---|
| 4455 | r_cc_receive_dcache_req = false; |
---|
| 4456 | r_dcache_fsm = r_dcache_fsm_cc_save.read(); |
---|
| 4457 | } |
---|
| 4458 | } |
---|
| 4459 | |
---|
| 4460 | #if DEBUG_DCACHE |
---|
| 4461 | if ( m_debug_dcache_fsm ) |
---|
| 4462 | { |
---|
| 4463 | std::cout << " <PROC " << name() |
---|
| 4464 | << " DCACHE_CC_CHECK> Coherence request received:" |
---|
| 4465 | << " PADDR = " << std::hex << paddr |
---|
| 4466 | << " / TYPE = " << std::dec << r_cc_receive_dcache_type.read() |
---|
| 4467 | << " / HIT = " << (state == CACHE_SLOT_STATE_VALID) << std::endl; |
---|
| 4468 | } |
---|
| 4469 | #endif |
---|
| 4470 | } |
---|
| 4471 | break; |
---|
| 4472 | } |
---|
| 4473 | ///////////////////// |
---|
| 4474 | case DCACHE_CC_INVAL: // hit inval: switch slot to EMPTY state, |
---|
| 4475 | // after possible invalidation of copies in TLBs |
---|
| 4476 | { |
---|
| 4477 | size_t way = r_dcache_cc_way.read(); |
---|
| 4478 | size_t set = r_dcache_cc_set.read(); |
---|
| 4479 | |
---|
| 4480 | if (r_dcache_cc_need_write.read()) |
---|
| 4481 | { |
---|
| 4482 | if ( r_dcache_in_tlb[way*m_dcache_sets+set] ) // selective TLB inval |
---|
| 4483 | { |
---|
| 4484 | r_dcache_in_tlb[way*m_dcache_sets+set] = false; |
---|
| 4485 | r_dcache_tlb_inval_line = r_cc_receive_dcache_nline.read(); |
---|
| 4486 | r_dcache_tlb_inval_set = 0; |
---|
| 4487 | r_dcache_fsm_scan_save = r_dcache_fsm.read(); |
---|
| 4488 | r_dcache_fsm = DCACHE_INVAL_TLB_SCAN; |
---|
| 4489 | break; |
---|
| 4490 | } |
---|
| 4491 | else |
---|
| 4492 | { |
---|
| 4493 | if ( r_dcache_contains_ptd[way*m_dcache_sets+set] ) // TLB flush |
---|
| 4494 | { |
---|
| 4495 | r_itlb.reset(); |
---|
| 4496 | r_dtlb.reset(); |
---|
| 4497 | r_dcache_contains_ptd[way*m_dcache_sets+set] = false; |
---|
| 4498 | |
---|
| 4499 | #if DEBUG_DCACHE |
---|
| 4500 | if ( m_debug_dcache_fsm ) |
---|
| 4501 | { |
---|
| 4502 | std::cout << " <PROC " << name() |
---|
| 4503 | << " DCACHE_CC_INVAL> Flush DTLB & ITLB" << std::endl; |
---|
| 4504 | } |
---|
| 4505 | #endif |
---|
| 4506 | } |
---|
| 4507 | |
---|
| 4508 | r_dcache.write_dir( 0, |
---|
| 4509 | way, |
---|
| 4510 | set, |
---|
| 4511 | CACHE_SLOT_STATE_EMPTY ); |
---|
| 4512 | |
---|
| 4513 | r_dcache_cc_need_write = false; |
---|
| 4514 | |
---|
| 4515 | #if DEBUG_DCACHE |
---|
| 4516 | if ( m_debug_dcache_fsm ) |
---|
| 4517 | { |
---|
| 4518 | std::cout << " <PROC " << name() |
---|
| 4519 | << " DCACHE_CC_INVAL> Switch slot to EMPTY state:" << std::dec |
---|
| 4520 | << " / WAY = " << way |
---|
| 4521 | << " / SET = " << set << std::endl; |
---|
| 4522 | } |
---|
| 4523 | #endif |
---|
| 4524 | } |
---|
| 4525 | } |
---|
| 4526 | // multicast acknowledgement |
---|
| 4527 | // send a request to cc_send_fsm |
---|
| 4528 | if(not r_dcache_cc_send_req.read()) // cc_send is available |
---|
| 4529 | { |
---|
| 4530 | // coherence request completed |
---|
| 4531 | r_cc_receive_dcache_req = false; |
---|
| 4532 | // request multicast acknowledgement |
---|
| 4533 | r_dcache_cc_send_req = true; |
---|
[369] | 4534 | r_dcache_cc_send_nline = r_cc_receive_dcache_nline.read(); |
---|
[331] | 4535 | r_dcache_cc_send_updt_tab_idx = r_cc_receive_dcache_updt_tab_idx.read(); |
---|
| 4536 | r_dcache_cc_send_type = CC_TYPE_MULTI_ACK; |
---|
| 4537 | |
---|
| 4538 | r_dcache_fsm = r_dcache_fsm_cc_save.read(); |
---|
| 4539 | } |
---|
| 4540 | //else wait for previous cc_send request to be sent |
---|
| 4541 | break; |
---|
| 4542 | } |
---|
| 4543 | /////////////////// |
---|
| 4544 | case DCACHE_CC_UPDT: // hit update: write one word per cycle, |
---|
| 4545 | // after possible invalidation of copies in TLBs |
---|
| 4546 | { |
---|
| 4547 | size_t word = r_dcache_cc_word.read(); |
---|
| 4548 | size_t way = r_dcache_cc_way.read(); |
---|
| 4549 | size_t set = r_dcache_cc_set.read(); |
---|
| 4550 | |
---|
| 4551 | if (r_cc_receive_updt_fifo_be.rok()) |
---|
| 4552 | { |
---|
| 4553 | if (r_dcache_cc_need_write.read()) |
---|
| 4554 | { |
---|
| 4555 | if ( r_dcache_in_tlb[way*m_dcache_sets+set] ) // selective TLB inval |
---|
| 4556 | { |
---|
| 4557 | r_dcache_in_tlb[way*m_dcache_sets+set] = false; |
---|
| 4558 | r_dcache_tlb_inval_line = r_cc_receive_dcache_nline.read(); |
---|
| 4559 | r_dcache_tlb_inval_set = 0; |
---|
| 4560 | r_dcache_fsm_scan_save = r_dcache_fsm.read(); |
---|
| 4561 | r_dcache_fsm = DCACHE_INVAL_TLB_SCAN; |
---|
| 4562 | break; |
---|
| 4563 | } |
---|
| 4564 | |
---|
| 4565 | if ( r_dcache_contains_ptd[way*m_dcache_sets+set] ) // TLB flush |
---|
| 4566 | { |
---|
| 4567 | r_itlb.reset(); |
---|
| 4568 | r_dtlb.reset(); |
---|
| 4569 | r_dcache_contains_ptd[way*m_dcache_sets+set] = false; |
---|
| 4570 | |
---|
| 4571 | #if DEBUG_DCACHE |
---|
| 4572 | if ( m_debug_dcache_fsm ) |
---|
| 4573 | { |
---|
| 4574 | std::cout << " <PROC " << name() |
---|
| 4575 | << " DCACHE_CC_UPDT> Flush DTLB & ITLB" << std::endl; |
---|
| 4576 | } |
---|
| 4577 | #endif |
---|
| 4578 | } |
---|
| 4579 | |
---|
| 4580 | #ifdef INSTRUMENTATION |
---|
| 4581 | m_cpt_dcache_data_write++; |
---|
| 4582 | #endif |
---|
| 4583 | r_dcache.write( way, |
---|
| 4584 | set, |
---|
| 4585 | word, |
---|
| 4586 | r_cc_receive_updt_fifo_data.read(), |
---|
| 4587 | r_cc_receive_updt_fifo_be.read() ); |
---|
| 4588 | |
---|
| 4589 | r_dcache_cc_word = word + 1; |
---|
| 4590 | |
---|
| 4591 | #if DEBUG_DCACHE |
---|
| 4592 | if ( m_debug_dcache_fsm ) |
---|
| 4593 | { |
---|
| 4594 | std::cout << " <PROC " << name() |
---|
| 4595 | << " DCACHE_CC_UPDT> Write one word" << std::dec |
---|
| 4596 | << " / WAY = " << way |
---|
| 4597 | << " / SET = " << set |
---|
| 4598 | << " / WORD = " << word |
---|
| 4599 | << " / VALUE = " << std::hex << r_cc_receive_updt_fifo_data.read() << std::endl; |
---|
| 4600 | } |
---|
| 4601 | #endif |
---|
| 4602 | } |
---|
| 4603 | |
---|
| 4604 | if ( r_cc_receive_updt_fifo_eop.read() ) // last word |
---|
| 4605 | { |
---|
| 4606 | // no need to write in the cache anymore |
---|
| 4607 | r_dcache_cc_need_write = false; |
---|
| 4608 | |
---|
| 4609 | // wait to send a request to cc_send_fsm |
---|
| 4610 | if(not r_icache_cc_send_req.read()) |
---|
| 4611 | // cc_send is available |
---|
| 4612 | { |
---|
| 4613 | //consume last fifo flit if eop and request to cc_send possible |
---|
| 4614 | cc_receive_updt_fifo_get = true; |
---|
| 4615 | |
---|
| 4616 | // coherence request completed |
---|
| 4617 | r_cc_receive_dcache_req = false; |
---|
| 4618 | |
---|
| 4619 | // request multicast acknowledgement |
---|
| 4620 | r_dcache_cc_send_req = true; |
---|
[369] | 4621 | r_dcache_cc_send_nline = r_cc_receive_dcache_nline.read(); |
---|
[331] | 4622 | r_dcache_cc_send_updt_tab_idx = r_cc_receive_dcache_updt_tab_idx.read(); |
---|
| 4623 | r_dcache_cc_send_type = CC_TYPE_MULTI_ACK; |
---|
| 4624 | |
---|
| 4625 | r_dcache_fsm = r_dcache_fsm_cc_save.read(); |
---|
| 4626 | } |
---|
| 4627 | } |
---|
| 4628 | else |
---|
| 4629 | { |
---|
| 4630 | //consume fifo if not eop |
---|
| 4631 | cc_receive_updt_fifo_get = true; |
---|
| 4632 | } |
---|
| 4633 | } |
---|
| 4634 | break; |
---|
| 4635 | } |
---|
| 4636 | ///////////////////////// |
---|
| 4637 | case DCACHE_CC_BROADCAST: // hit broadcast : switch state to ZOMBI state |
---|
| 4638 | // and request a cleanup, after possible |
---|
| 4639 | // invalidation of copies in TLBs |
---|
| 4640 | { |
---|
| 4641 | size_t way = r_dcache_cc_way.read(); |
---|
| 4642 | size_t set = r_dcache_cc_set.read(); |
---|
| 4643 | paddr_t nline = r_cc_receive_dcache_nline.read(); |
---|
| 4644 | |
---|
| 4645 | if (r_dcache_cc_need_write.read()) |
---|
| 4646 | { |
---|
| 4647 | if ( r_dcache_in_tlb[way*m_dcache_sets+set] ) // selective TLB inval |
---|
| 4648 | { |
---|
| 4649 | r_dcache_in_tlb[way*m_dcache_sets+set] = false; |
---|
| 4650 | r_dcache_tlb_inval_line = nline; |
---|
| 4651 | r_dcache_tlb_inval_set = 0; |
---|
| 4652 | r_dcache_fsm_scan_save = r_dcache_fsm.read(); |
---|
| 4653 | r_dcache_fsm = DCACHE_INVAL_TLB_SCAN; |
---|
| 4654 | break; |
---|
| 4655 | } |
---|
| 4656 | else |
---|
| 4657 | { |
---|
| 4658 | if ( r_dcache_contains_ptd[way*m_dcache_sets+set] ) // TLB flush |
---|
| 4659 | { |
---|
| 4660 | r_itlb.reset(); |
---|
| 4661 | r_dtlb.reset(); |
---|
| 4662 | r_dcache_contains_ptd[way*m_dcache_sets+set] = false; |
---|
| 4663 | |
---|
| 4664 | #if DEBUG_DCACHE |
---|
| 4665 | if ( m_debug_dcache_fsm ) |
---|
| 4666 | { |
---|
| 4667 | std::cout << " <PROC " << name() |
---|
| 4668 | << " DCACHE_CC_BROADCAST> Flush DTLB & ITLB" << std::endl; |
---|
| 4669 | } |
---|
| 4670 | #endif |
---|
| 4671 | } |
---|
| 4672 | |
---|
| 4673 | #ifdef INSTRUMENTATION |
---|
| 4674 | m_cpt_dcache_dir_write++; |
---|
| 4675 | #endif |
---|
[366] | 4676 | r_dcache.write_dir( way, |
---|
[331] | 4677 | set, |
---|
| 4678 | CACHE_SLOT_STATE_ZOMBI ); |
---|
| 4679 | |
---|
| 4680 | r_dcache_cc_need_write = false; |
---|
| 4681 | #if DEBUG_DCACHE |
---|
| 4682 | if ( m_debug_dcache_fsm ) |
---|
| 4683 | { |
---|
| 4684 | std::cout << " <PROC " << name() |
---|
| 4685 | << " DCACHE_CC_BROADCAST > Slot goes to ZOMBI state " |
---|
| 4686 | << " SET = " << set |
---|
| 4687 | << " / WAY = " << way << std::endl; |
---|
| 4688 | } |
---|
| 4689 | #endif |
---|
| 4690 | } |
---|
| 4691 | } |
---|
| 4692 | // cleanup |
---|
| 4693 | // send a request to cc_send_fsm |
---|
| 4694 | if(not r_dcache_cc_send_req.read()) // cc_send is available |
---|
| 4695 | { |
---|
| 4696 | // coherence request completed |
---|
| 4697 | r_cc_receive_dcache_req = false; |
---|
| 4698 | // request cleanup |
---|
| 4699 | r_dcache_cc_send_req = true; |
---|
| 4700 | r_dcache_cc_send_nline = r_cc_receive_dcache_nline.read(); |
---|
| 4701 | r_dcache_cc_send_way = r_dcache_cc_way.read(); |
---|
| 4702 | r_dcache_cc_send_type = CC_TYPE_CLEANUP; |
---|
| 4703 | |
---|
| 4704 | r_dcache_fsm = r_dcache_fsm_cc_save.read(); |
---|
| 4705 | } |
---|
| 4706 | //else wait for previous cc_send request to be sent |
---|
| 4707 | break; |
---|
| 4708 | } |
---|
| 4709 | /////////////////////////// |
---|
| 4710 | case DCACHE_INVAL_TLB_SCAN: // Scan sequencially all sets for both ITLB & DTLB |
---|
| 4711 | // It makes assumption: m_itlb_sets == m_dtlb_sets |
---|
| 4712 | // All ways are handled in parallel. |
---|
| 4713 | // We enter this state when a DCACHE line is modified, |
---|
| 4714 | // and there is a copy in itlb or dtlb. |
---|
| 4715 | // It can be caused by: |
---|
| 4716 | // - a coherence inval or updt transaction, |
---|
| 4717 | // - a line inval caused by a cache miss |
---|
| 4718 | // - a processor XTN inval request, |
---|
| 4719 | // - a WRITE hit, |
---|
| 4720 | // - a Dirty bit update |
---|
| 4721 | // Input arguments are: |
---|
| 4722 | // - r_dcache_tlb_inval_line |
---|
| 4723 | // - r_dcache_tlb_inval_set |
---|
| 4724 | // - r_dcache_fsm_scan_save |
---|
| 4725 | { |
---|
| 4726 | paddr_t line = r_dcache_tlb_inval_line.read(); |
---|
| 4727 | size_t set = r_dcache_tlb_inval_set.read(); |
---|
| 4728 | size_t way; |
---|
| 4729 | bool ok; |
---|
| 4730 | |
---|
| 4731 | for ( way = 0 ; way < m_itlb_ways ; way++ ) |
---|
| 4732 | { |
---|
| 4733 | ok = r_itlb.inval( line, way, set ); |
---|
| 4734 | |
---|
| 4735 | #if DEBUG_DCACHE |
---|
| 4736 | if ( m_debug_dcache_fsm and ok ) |
---|
| 4737 | { |
---|
| 4738 | std::cout << " <PROC " << name() |
---|
| 4739 | << ".DCACHE_INVAL_TLB_SCAN> Invalidate ITLB entry:" << std::hex |
---|
| 4740 | << " line = " << line << std::dec |
---|
| 4741 | << " / set = " << set |
---|
| 4742 | << " / way = " << way << std::endl; |
---|
| 4743 | } |
---|
| 4744 | #endif |
---|
| 4745 | } |
---|
| 4746 | |
---|
| 4747 | for ( way = 0 ; way < m_dtlb_ways ; way++ ) |
---|
| 4748 | { |
---|
| 4749 | ok = r_dtlb.inval( line, way, set ); |
---|
| 4750 | |
---|
| 4751 | #if DEBUG_DCACHE |
---|
| 4752 | if ( m_debug_dcache_fsm and ok ) |
---|
| 4753 | { |
---|
| 4754 | std::cout << " <PROC " << name() |
---|
| 4755 | << ".DCACHE_INVAL_TLB_SCAN> Invalidate DTLB entry:" << std::hex |
---|
| 4756 | << " line = " << line << std::dec |
---|
| 4757 | << " / set = " << set |
---|
| 4758 | << " / way = " << way << std::endl; |
---|
| 4759 | } |
---|
| 4760 | #endif |
---|
| 4761 | } |
---|
| 4762 | |
---|
| 4763 | // return to the calling state when TLB inval completed |
---|
| 4764 | if ( r_dcache_tlb_inval_set.read() == (m_dtlb_sets-1) ) |
---|
| 4765 | { |
---|
| 4766 | r_dcache_fsm = r_dcache_fsm_scan_save.read(); |
---|
| 4767 | } |
---|
| 4768 | r_dcache_tlb_inval_set = r_dcache_tlb_inval_set.read() + 1; |
---|
| 4769 | break; |
---|
| 4770 | } |
---|
| 4771 | } // end switch r_dcache_fsm |
---|
| 4772 | |
---|
| 4773 | ///////////////// wbuf update /////////////////////////////////////////////////////// |
---|
| 4774 | r_wbuf.update(); |
---|
| 4775 | |
---|
| 4776 | ///////////////// llsc update /////////////////////////////////////////////////////// |
---|
| 4777 | if (r_dcache_llsc_valid.read()) r_dcache_llsc_count = r_dcache_llsc_count.read() - 1; |
---|
| 4778 | if (r_dcache_llsc_count.read() == 1) r_dcache_llsc_valid = false; |
---|
| 4779 | |
---|
| 4780 | //////////////// test processor frozen ////////////////////////////////////////////// |
---|
| 4781 | // The simulation exit if the number of consecutive frozen cycles |
---|
| 4782 | // is larger than the m_max_frozen_cycles (constructor parameter) |
---|
| 4783 | if ( (m_ireq.valid and not m_irsp.valid) or (m_dreq.valid and not m_drsp.valid) ) |
---|
| 4784 | { |
---|
| 4785 | m_cpt_frz_cycles++; // used for instrumentation |
---|
| 4786 | m_cpt_stop_simulation++; // used for debug |
---|
| 4787 | if ( m_cpt_stop_simulation > m_max_frozen_cycles ) |
---|
| 4788 | { |
---|
| 4789 | std::cout << std::dec << "ERROR in CC_VCACHE_WRAPPER " << name() << std::endl |
---|
| 4790 | << " stop at cycle " << m_cpt_total_cycles << std::endl |
---|
| 4791 | << " frozen since cycle " << m_cpt_total_cycles - m_max_frozen_cycles |
---|
| 4792 | << std::endl; |
---|
| 4793 | r_iss.dump(); |
---|
| 4794 | exit(1); |
---|
| 4795 | } |
---|
| 4796 | } |
---|
| 4797 | else |
---|
| 4798 | { |
---|
| 4799 | m_cpt_stop_simulation = 0; |
---|
| 4800 | } |
---|
| 4801 | |
---|
| 4802 | /////////// execute one iss cycle ///////////////////////////////// |
---|
| 4803 | { |
---|
| 4804 | uint32_t it = 0; |
---|
| 4805 | for (size_t i=0; i<(size_t)iss_t::n_irq; i++) if(p_irq[i].read()) it |= (1<<i); |
---|
| 4806 | r_iss.executeNCycles(1, m_irsp, m_drsp, it); |
---|
| 4807 | } |
---|
| 4808 | |
---|
| 4809 | //////////////////////////////////////////////////////////////////////////// |
---|
| 4810 | // The VCI_CMD FSM controls the following ressources: |
---|
| 4811 | // - r_vci_cmd_fsm |
---|
| 4812 | // - r_vci_cmd_min |
---|
| 4813 | // - r_vci_cmd_max |
---|
| 4814 | // - r_vci_cmd_cpt |
---|
| 4815 | // - r_vci_cmd_imiss_prio |
---|
| 4816 | // - wbuf (reset) |
---|
| 4817 | // - r_icache_miss_req (reset) |
---|
| 4818 | // - r_icache_unc_req (reset) |
---|
| 4819 | // - r_dcache_vci_miss_req (reset) |
---|
| 4820 | // - r_dcache_vci_unc_req (reset) |
---|
| 4821 | // - r_dcache_vci_ll_req (reset) |
---|
| 4822 | // - r_dcache_vci_sc_req (reset in case of local sc fail) |
---|
| 4823 | // - r_dcache_vci_cas_req (reset) |
---|
| 4824 | // |
---|
| 4825 | // This FSM handles requests from both the DCACHE FSM & the ICACHE FSM. |
---|
| 4826 | // There are 8 request types, with the following priorities : |
---|
| 4827 | // 1 - Data Read Miss : r_dcache_vci_miss_req and miss in the write buffer |
---|
| 4828 | // 2 - Data Read Uncachable : r_dcache_vci_unc_req |
---|
| 4829 | // 3 - Instruction Miss : r_icache_miss_req and miss in the write buffer |
---|
| 4830 | // 4 - Instruction Uncachable : r_icache_unc_req |
---|
| 4831 | // 5 - Data Write : r_wbuf.rok() |
---|
| 4832 | // 6 - Data Linked Load : r_dcache_vci_ll_req |
---|
| 4833 | // 7 - Data Store Conditionnal: r_dcache_vci_sc_req |
---|
| 4834 | // 8 - Compare And Swap : r_dcache_vci_cas_req |
---|
| 4835 | // |
---|
| 4836 | // As we want to support several simultaneous VCI transactions, the VCI_CMD_FSM |
---|
| 4837 | // and the VCI_RSP_FSM are fully desynchronized. |
---|
| 4838 | // |
---|
| 4839 | // VCI formats: |
---|
| 4840 | // According to the VCI advanced specification, all read requests packets |
---|
| 4841 | // (data Uncached, Miss data, instruction Uncached, Miss instruction) |
---|
| 4842 | // are one word packets. |
---|
| 4843 | // For write burst packets, all words are in the same cache line, |
---|
| 4844 | // and addresses must be contiguous (the BE field is 0 in case of "holes"). |
---|
| 4845 | // The sc command packet implements actually a compare-and-swap mechanism |
---|
| 4846 | // and the packet contains two flits. |
---|
| 4847 | //////////////////////////////////////////////////////////////////////////////////// |
---|
| 4848 | |
---|
| 4849 | switch ( r_vci_cmd_fsm.read() ) |
---|
| 4850 | { |
---|
| 4851 | ////////////// |
---|
| 4852 | case CMD_IDLE: |
---|
| 4853 | { |
---|
| 4854 | // DDACHE read requests (r_dcache_vci_miss_req or r_dcache_vci_ll_req), and |
---|
| 4855 | // ICACHE read requests (r_icache_miss_req) require both a write_buffer access |
---|
| 4856 | // to check a possible pending write on the same cache line. |
---|
| 4857 | // As there is only one possible access per cycle to write buffer, we implement |
---|
| 4858 | // a round-robin priority between DCACHE and ICACHE for this access, |
---|
| 4859 | // using the r_vci_cmd_imiss_prio flip-flop. |
---|
| 4860 | |
---|
| 4861 | size_t wbuf_min; |
---|
| 4862 | size_t wbuf_max; |
---|
| 4863 | |
---|
| 4864 | bool dcache_unc_req = r_dcache_vci_unc_req.read() and |
---|
| 4865 | ( not r_icache_miss_req.read() or not r_vci_cmd_imiss_prio.read() ); |
---|
| 4866 | |
---|
| 4867 | bool dcache_miss_req = r_dcache_vci_miss_req.read() and |
---|
| 4868 | ( not r_icache_miss_req.read() or not r_vci_cmd_imiss_prio.read() ); |
---|
| 4869 | |
---|
| 4870 | bool dcache_ll_req = r_dcache_vci_ll_req.read() and |
---|
| 4871 | ( not r_icache_miss_req.read() or not r_vci_cmd_imiss_prio.read() ); |
---|
| 4872 | |
---|
| 4873 | bool icache_miss_req = r_icache_miss_req.read() and |
---|
| 4874 | ( not (r_dcache_vci_miss_req.read() or |
---|
| 4875 | r_dcache_vci_ll_req.read() or |
---|
| 4876 | r_dcache_vci_unc_req.read()) |
---|
[366] | 4877 | or r_vci_cmd_imiss_prio.read() ); |
---|
[331] | 4878 | |
---|
[366] | 4879 | |
---|
[331] | 4880 | // 1 - Data Read Miss |
---|
| 4881 | if ( dcache_miss_req and r_wbuf.miss(r_dcache_vci_paddr.read()) ) |
---|
| 4882 | { |
---|
| 4883 | r_vci_cmd_fsm = CMD_DATA_MISS; |
---|
| 4884 | r_dcache_vci_miss_req = false; |
---|
| 4885 | r_vci_cmd_imiss_prio = true; |
---|
| 4886 | // m_cpt_dmiss_transaction++; |
---|
| 4887 | } |
---|
| 4888 | // 2 - Data Read Uncachable |
---|
| 4889 | else if ( dcache_unc_req and r_wbuf.miss(r_dcache_vci_paddr.read())) |
---|
| 4890 | { |
---|
| 4891 | r_vci_cmd_fsm = CMD_DATA_UNC; |
---|
| 4892 | r_dcache_vci_unc_req = false; |
---|
| 4893 | // m_cpt_dunc_transaction++; |
---|
| 4894 | } |
---|
| 4895 | // 3 - Data Linked Load |
---|
| 4896 | else if ( dcache_ll_req and r_wbuf.miss(r_dcache_vci_paddr.read())) |
---|
| 4897 | { |
---|
| 4898 | r_dcache_vci_ll_req = false; |
---|
| 4899 | r_vci_cmd_fsm = CMD_DATA_LL; |
---|
| 4900 | // m_cpt_ll_transaction++; |
---|
| 4901 | } |
---|
| 4902 | // 4 - Instruction Miss |
---|
| 4903 | else if ( icache_miss_req and r_wbuf.miss(r_icache_vci_paddr.read()) ) |
---|
| 4904 | { |
---|
| 4905 | r_vci_cmd_fsm = CMD_INS_MISS; |
---|
| 4906 | r_icache_miss_req = false; |
---|
| 4907 | r_vci_cmd_imiss_prio = false; |
---|
| 4908 | // m_cpt_imiss_transaction++; |
---|
| 4909 | } |
---|
| 4910 | // 5 - Instruction Uncachable |
---|
| 4911 | else if ( r_icache_unc_req.read() ) |
---|
| 4912 | { |
---|
| 4913 | r_vci_cmd_fsm = CMD_INS_UNC; |
---|
| 4914 | r_icache_unc_req = false; |
---|
| 4915 | // m_cpt_iunc_transaction++; |
---|
| 4916 | } |
---|
| 4917 | // 6 - Data Write |
---|
| 4918 | else if ( r_wbuf.rok(&wbuf_min, &wbuf_max) ) |
---|
| 4919 | { |
---|
| 4920 | r_vci_cmd_fsm = CMD_DATA_WRITE; |
---|
| 4921 | r_vci_cmd_cpt = wbuf_min; |
---|
| 4922 | r_vci_cmd_min = wbuf_min; |
---|
| 4923 | r_vci_cmd_max = wbuf_max; |
---|
| 4924 | // m_cpt_write_transaction++; |
---|
| 4925 | // m_length_write_transaction += (wbuf_max-wbuf_min+1); |
---|
| 4926 | } |
---|
| 4927 | // 7 - Data Store Conditionnal |
---|
| 4928 | else if ( r_dcache_vci_sc_req.read() ) |
---|
| 4929 | { |
---|
| 4930 | r_dcache_vci_sc_req = false; |
---|
| 4931 | r_vci_cmd_cpt = 0; |
---|
| 4932 | r_vci_cmd_fsm = CMD_DATA_SC; |
---|
| 4933 | // m_cpt_sc_transaction++; |
---|
| 4934 | } |
---|
| 4935 | // 8 - Compare And Swap |
---|
| 4936 | else if ( r_dcache_vci_cas_req.read() ) |
---|
| 4937 | { |
---|
| 4938 | r_vci_cmd_fsm = CMD_DATA_CAS; |
---|
| 4939 | r_dcache_vci_cas_req = false; |
---|
| 4940 | r_vci_cmd_cpt = 0; |
---|
| 4941 | // m_cpt_cas_transaction++; |
---|
| 4942 | } |
---|
| 4943 | break; |
---|
| 4944 | } |
---|
| 4945 | //////////////////// |
---|
| 4946 | case CMD_DATA_WRITE: |
---|
| 4947 | { |
---|
[346] | 4948 | if ( p_vci.cmdack.read() ) |
---|
[331] | 4949 | { |
---|
| 4950 | r_vci_cmd_cpt = r_vci_cmd_cpt + 1; |
---|
| 4951 | if (r_vci_cmd_cpt == r_vci_cmd_max) // last flit sent |
---|
| 4952 | { |
---|
| 4953 | r_vci_cmd_fsm = CMD_IDLE ; |
---|
| 4954 | r_wbuf.sent() ; |
---|
| 4955 | } |
---|
| 4956 | } |
---|
| 4957 | break; |
---|
| 4958 | } |
---|
| 4959 | ///////////////// |
---|
| 4960 | case CMD_DATA_SC: |
---|
| 4961 | case CMD_DATA_CAS: |
---|
| 4962 | { |
---|
| 4963 | // The CAS and SC VCI commands contain two flits |
---|
[346] | 4964 | if ( p_vci.cmdack.read() ) |
---|
[331] | 4965 | { |
---|
| 4966 | r_vci_cmd_cpt = r_vci_cmd_cpt + 1; |
---|
| 4967 | if (r_vci_cmd_cpt == 1) r_vci_cmd_fsm = CMD_IDLE ; |
---|
| 4968 | } |
---|
| 4969 | break; |
---|
| 4970 | } |
---|
| 4971 | ////////////////// |
---|
| 4972 | case CMD_INS_MISS: |
---|
| 4973 | case CMD_INS_UNC: |
---|
| 4974 | case CMD_DATA_MISS: |
---|
| 4975 | case CMD_DATA_UNC: |
---|
| 4976 | case CMD_DATA_LL: |
---|
| 4977 | { |
---|
| 4978 | // all read VCI commands contain one single flit |
---|
[346] | 4979 | if ( p_vci.cmdack.read() ) r_vci_cmd_fsm = CMD_IDLE; |
---|
[331] | 4980 | break; |
---|
| 4981 | } |
---|
| 4982 | |
---|
| 4983 | } // end switch r_vci_cmd_fsm |
---|
| 4984 | |
---|
| 4985 | ////////////////////////////////////////////////////////////////////////// |
---|
| 4986 | // The VCI_RSP FSM controls the following ressources: |
---|
| 4987 | // - r_vci_rsp_fsm: |
---|
| 4988 | // - r_vci_rsp_fifo_icache (push) |
---|
| 4989 | // - r_vci_rsp_fifo_dcache (push) |
---|
| 4990 | // - r_vci_rsp_data_error (set) |
---|
| 4991 | // - r_vci_rsp_ins_error (set) |
---|
| 4992 | // - r_vci_rsp_cpt |
---|
| 4993 | // - r_dcache_vci_sc_req (reset when SC response recieved) |
---|
| 4994 | // |
---|
| 4995 | // As the VCI_RSP and VCI_CMD are fully desynchronized to support several |
---|
| 4996 | // simultaneous VCI transactions, this FSM uses the VCI RPKTID field |
---|
| 4997 | // to identify the transactions. |
---|
| 4998 | // |
---|
| 4999 | // VCI vormat: |
---|
| 5000 | // This component checks the response packet length and accepts only |
---|
| 5001 | // single word packets for write response packets. |
---|
| 5002 | // |
---|
| 5003 | // Error handling: |
---|
| 5004 | // This FSM analyzes the VCI error code and signals directly the Write Bus Error. |
---|
| 5005 | // In case of Read Data Error, the VCI_RSP FSM sets the r_vci_rsp_data_error |
---|
| 5006 | // flip_flop and the error is signaled by the DCACHE FSM. |
---|
| 5007 | // In case of Instruction Error, the VCI_RSP FSM sets the r_vci_rsp_ins_error |
---|
| 5008 | // flip_flop and the error is signaled by the ICACHE FSM. |
---|
| 5009 | // In case of Cleanup Error, the simulation stops with an error message... |
---|
| 5010 | ////////////////////////////////////////////////////////////////////////// |
---|
| 5011 | |
---|
| 5012 | switch ( r_vci_rsp_fsm.read() ) |
---|
| 5013 | { |
---|
| 5014 | ////////////// |
---|
| 5015 | case RSP_IDLE: |
---|
| 5016 | { |
---|
[346] | 5017 | if ( p_vci.rspval.read() ) |
---|
[331] | 5018 | { |
---|
| 5019 | r_vci_rsp_cpt = 0; |
---|
| 5020 | |
---|
[346] | 5021 | if ( (p_vci.rpktid.read() & 0x7) == TYPE_READ_DATA_UNC ) |
---|
[331] | 5022 | { |
---|
| 5023 | r_vci_rsp_fsm = RSP_DATA_UNC; |
---|
| 5024 | } |
---|
[346] | 5025 | else if ( (p_vci.rpktid.read() & 0x7) == TYPE_READ_DATA_MISS ) |
---|
[331] | 5026 | { |
---|
| 5027 | r_vci_rsp_fsm = RSP_DATA_MISS; |
---|
| 5028 | } |
---|
[346] | 5029 | else if ( (p_vci.rpktid.read() & 0x7) == TYPE_READ_INS_UNC ) |
---|
[331] | 5030 | { |
---|
| 5031 | r_vci_rsp_fsm = RSP_INS_UNC; |
---|
| 5032 | } |
---|
[346] | 5033 | else if ( (p_vci.rpktid.read() & 0x7) == TYPE_READ_INS_MISS ) |
---|
[331] | 5034 | { |
---|
| 5035 | r_vci_rsp_fsm = RSP_INS_MISS; |
---|
| 5036 | } |
---|
[346] | 5037 | else if ( (p_vci.rpktid.read() & 0x7) == TYPE_WRITE ) |
---|
[331] | 5038 | { |
---|
| 5039 | r_vci_rsp_fsm = RSP_DATA_WRITE; |
---|
| 5040 | } |
---|
[346] | 5041 | else if ( (p_vci.rpktid.read() & 0x7) == TYPE_CAS ) |
---|
[331] | 5042 | { |
---|
| 5043 | r_vci_rsp_fsm = RSP_DATA_UNC; |
---|
| 5044 | } |
---|
[346] | 5045 | else if ( (p_vci.rpktid.read() & 0x7) == TYPE_LL ) |
---|
[331] | 5046 | { |
---|
| 5047 | r_vci_rsp_fsm = RSP_DATA_LL; |
---|
| 5048 | } |
---|
[346] | 5049 | else if ( (p_vci.rpktid.read() & 0x7) == TYPE_SC ) |
---|
[331] | 5050 | { |
---|
| 5051 | r_vci_rsp_fsm = RSP_DATA_UNC; |
---|
| 5052 | } |
---|
| 5053 | else |
---|
| 5054 | { |
---|
| 5055 | assert(false and "Unexpected VCI response"); |
---|
| 5056 | } |
---|
| 5057 | } |
---|
| 5058 | break; |
---|
| 5059 | } |
---|
| 5060 | ////////////////// |
---|
| 5061 | case RSP_INS_MISS: |
---|
| 5062 | { |
---|
[346] | 5063 | if ( p_vci.rspval.read() ) |
---|
[331] | 5064 | { |
---|
[346] | 5065 | if ( (p_vci.rerror.read()&0x1) != 0 ) // error reported |
---|
[331] | 5066 | { |
---|
| 5067 | r_vci_rsp_ins_error = true; |
---|
[346] | 5068 | if ( p_vci.reop.read() ) r_vci_rsp_fsm = RSP_IDLE; |
---|
[331] | 5069 | } |
---|
| 5070 | else // no error reported |
---|
| 5071 | { |
---|
| 5072 | if ( r_vci_rsp_fifo_icache.wok() ) |
---|
| 5073 | { |
---|
| 5074 | assert( (r_vci_rsp_cpt.read() < m_icache_words) and |
---|
| 5075 | "The VCI response packet for instruction miss is too long" ); |
---|
| 5076 | |
---|
| 5077 | r_vci_rsp_cpt = r_vci_rsp_cpt.read() + 1; |
---|
| 5078 | vci_rsp_fifo_icache_put = true, |
---|
[346] | 5079 | vci_rsp_fifo_icache_data = p_vci.rdata.read(); |
---|
| 5080 | if ( p_vci.reop.read() ) |
---|
[331] | 5081 | { |
---|
| 5082 | assert( (r_vci_rsp_cpt.read() == m_icache_words - 1) and |
---|
| 5083 | "The VCI response packet for instruction miss is too short"); |
---|
| 5084 | |
---|
| 5085 | r_vci_rsp_fsm = RSP_IDLE; |
---|
| 5086 | } |
---|
| 5087 | } |
---|
| 5088 | } |
---|
| 5089 | } |
---|
| 5090 | break; |
---|
| 5091 | } |
---|
| 5092 | ///////////////// |
---|
| 5093 | case RSP_INS_UNC: |
---|
| 5094 | { |
---|
[346] | 5095 | if (p_vci.rspval.read() ) |
---|
[331] | 5096 | { |
---|
[346] | 5097 | assert( p_vci.reop.read() and |
---|
[331] | 5098 | "illegal VCI response packet for uncachable instruction"); |
---|
| 5099 | |
---|
[346] | 5100 | if ( (p_vci.rerror.read()&0x1) != 0 ) // error reported |
---|
[331] | 5101 | { |
---|
| 5102 | r_vci_rsp_ins_error = true; |
---|
| 5103 | r_vci_rsp_fsm = RSP_IDLE; |
---|
| 5104 | } |
---|
| 5105 | else // no error reported |
---|
| 5106 | { |
---|
| 5107 | if ( r_vci_rsp_fifo_icache.wok()) |
---|
| 5108 | { |
---|
| 5109 | vci_rsp_fifo_icache_put = true; |
---|
[346] | 5110 | vci_rsp_fifo_icache_data = p_vci.rdata.read(); |
---|
[331] | 5111 | r_vci_rsp_fsm = RSP_IDLE; |
---|
| 5112 | } |
---|
| 5113 | } |
---|
| 5114 | } |
---|
| 5115 | break; |
---|
| 5116 | } |
---|
| 5117 | /////////////////// |
---|
| 5118 | case RSP_DATA_MISS: |
---|
| 5119 | { |
---|
[346] | 5120 | if ( p_vci.rspval.read() ) |
---|
[331] | 5121 | { |
---|
[346] | 5122 | if ( (p_vci.rerror.read()&0x1) != 0 ) // error reported |
---|
[331] | 5123 | { |
---|
| 5124 | r_vci_rsp_data_error = true; |
---|
[346] | 5125 | if ( p_vci.reop.read() ) r_vci_rsp_fsm = RSP_IDLE; |
---|
[331] | 5126 | } |
---|
| 5127 | else // no error reported |
---|
| 5128 | { |
---|
| 5129 | if ( r_vci_rsp_fifo_dcache.wok() ) |
---|
| 5130 | { |
---|
| 5131 | assert( (r_vci_rsp_cpt.read() < m_dcache_words) and |
---|
| 5132 | "The VCI response packet for data miss is too long"); |
---|
| 5133 | |
---|
| 5134 | r_vci_rsp_cpt = r_vci_rsp_cpt.read() + 1; |
---|
| 5135 | vci_rsp_fifo_dcache_put = true, |
---|
[346] | 5136 | vci_rsp_fifo_dcache_data = p_vci.rdata.read(); |
---|
| 5137 | if ( p_vci.reop.read() ) |
---|
[331] | 5138 | { |
---|
| 5139 | assert( (r_vci_rsp_cpt.read() == m_dcache_words - 1) and |
---|
| 5140 | "The VCI response packet for data miss is too short"); |
---|
| 5141 | |
---|
| 5142 | r_vci_rsp_fsm = RSP_IDLE; |
---|
| 5143 | } |
---|
| 5144 | } |
---|
| 5145 | } |
---|
| 5146 | } |
---|
| 5147 | break; |
---|
| 5148 | } |
---|
| 5149 | ////////////////// |
---|
| 5150 | case RSP_DATA_UNC: |
---|
| 5151 | { |
---|
[346] | 5152 | if (p_vci.rspval.read() ) |
---|
[331] | 5153 | { |
---|
[346] | 5154 | assert( p_vci.reop.read() and |
---|
[331] | 5155 | "illegal VCI response packet for uncachable read data"); |
---|
| 5156 | |
---|
[346] | 5157 | if ( (p_vci.rerror.read()&0x1) != 0 ) // error reported |
---|
[331] | 5158 | { |
---|
| 5159 | r_vci_rsp_data_error = true; |
---|
| 5160 | r_vci_rsp_fsm = RSP_IDLE; |
---|
| 5161 | } |
---|
| 5162 | else // no error reported |
---|
| 5163 | { |
---|
| 5164 | if ( r_vci_rsp_fifo_dcache.wok()) |
---|
| 5165 | { |
---|
| 5166 | vci_rsp_fifo_dcache_put = true; |
---|
[346] | 5167 | vci_rsp_fifo_dcache_data = p_vci.rdata.read(); |
---|
[331] | 5168 | r_vci_rsp_fsm = RSP_IDLE; |
---|
| 5169 | } |
---|
| 5170 | } |
---|
| 5171 | } |
---|
| 5172 | break; |
---|
| 5173 | } |
---|
| 5174 | //////////////////// |
---|
| 5175 | case RSP_DATA_LL: |
---|
| 5176 | { |
---|
[346] | 5177 | if ( p_vci.rspval.read() ) |
---|
[331] | 5178 | { |
---|
[346] | 5179 | if ( (p_vci.rerror.read()&0x1) != 0 ) // error reported |
---|
[331] | 5180 | { |
---|
| 5181 | r_vci_rsp_data_error = true; |
---|
| 5182 | r_vci_rsp_fsm = RSP_IDLE; |
---|
| 5183 | } |
---|
| 5184 | if (r_vci_rsp_cpt.read() == 0) //first flit |
---|
| 5185 | { |
---|
| 5186 | if(r_vci_rsp_fifo_dcache.wok()) |
---|
| 5187 | { |
---|
[346] | 5188 | assert(!p_vci.reop.read() && |
---|
[331] | 5189 | "illegal VCI response packet for LL"); |
---|
| 5190 | vci_rsp_fifo_dcache_put = true; |
---|
[346] | 5191 | vci_rsp_fifo_dcache_data = p_vci.rdata.read(); |
---|
[331] | 5192 | r_vci_rsp_cpt = r_vci_rsp_cpt.read() + 1; |
---|
| 5193 | } |
---|
| 5194 | break; |
---|
| 5195 | } |
---|
| 5196 | else // last flit |
---|
| 5197 | { |
---|
| 5198 | if(r_vci_rsp_fifo_dcache.wok()) |
---|
| 5199 | { |
---|
[346] | 5200 | assert(p_vci.reop.read() && |
---|
[331] | 5201 | "illegal VCI response packet for LL"); |
---|
| 5202 | vci_rsp_fifo_dcache_put = true; |
---|
[346] | 5203 | vci_rsp_fifo_dcache_data = p_vci.rdata.read(); |
---|
[331] | 5204 | r_vci_rsp_fsm = RSP_IDLE; |
---|
| 5205 | } |
---|
| 5206 | break; |
---|
| 5207 | } |
---|
| 5208 | } |
---|
| 5209 | break; |
---|
| 5210 | } |
---|
| 5211 | //////////////////// |
---|
| 5212 | case RSP_DATA_WRITE: |
---|
| 5213 | { |
---|
[346] | 5214 | if (p_vci.rspval.read()) |
---|
[331] | 5215 | { |
---|
[346] | 5216 | assert( p_vci.reop.read() and |
---|
[331] | 5217 | "a VCI response packet must contain one flit for a write transaction"); |
---|
| 5218 | |
---|
| 5219 | r_vci_rsp_fsm = RSP_IDLE; |
---|
[346] | 5220 | uint32_t wbuf_index = p_vci.rtrdid.read(); |
---|
[331] | 5221 | bool cacheable = r_wbuf.completed(wbuf_index); |
---|
| 5222 | if ( not cacheable ) r_dcache_pending_unc_write = false; |
---|
[346] | 5223 | if ( (p_vci.rerror.read()&0x1) != 0 ) r_iss.setWriteBerr(); |
---|
[331] | 5224 | } |
---|
| 5225 | break; |
---|
| 5226 | } |
---|
| 5227 | } // end switch r_vci_rsp_fsm |
---|
| 5228 | |
---|
| 5229 | ///////////////////////////////////////////////////////////////////////////////////// |
---|
| 5230 | // The CC_SEND FSM is in charge of sending cleanups and the multicast |
---|
| 5231 | // acknowledgements on the coherence network. It has two clients (DCACHE FSM |
---|
| 5232 | // and ICACHE FSM) that are served with a round-robin priority. |
---|
| 5233 | // The CC_SEND FSM resets the r_*cache_cc_send_req request flip-flops as |
---|
| 5234 | // soon as the request has been sent. |
---|
| 5235 | ///////////////////////////////////////////////////////////////////////////////////// |
---|
| 5236 | switch ( r_cc_send_fsm.read() ) |
---|
| 5237 | { |
---|
| 5238 | /////////////////////////// |
---|
| 5239 | case CC_SEND_IDLE: |
---|
| 5240 | { |
---|
| 5241 | /////////////////////////////////////////////////////// |
---|
| 5242 | // handling round robin between icache and dcache : // |
---|
| 5243 | // we first check for the last client and listen for // |
---|
| 5244 | // a request of the other, then update the client // |
---|
| 5245 | /////////////////////////////////////////////////////// |
---|
[333] | 5246 | // r_cc_send_last_client : 0 dcache / 1 icache |
---|
| 5247 | bool update_last_client = r_cc_send_last_client.read(); |
---|
[331] | 5248 | if ( r_cc_send_last_client.read() == 0 ) // last client was dcache |
---|
| 5249 | { |
---|
[333] | 5250 | if (r_icache_cc_send_req.read()) // request from icache |
---|
[331] | 5251 | update_last_client = 1; // update last client to icache |
---|
| 5252 | } |
---|
| 5253 | else // last client was icache |
---|
| 5254 | { |
---|
[333] | 5255 | if (r_dcache_cc_send_req.read()) // request from dcache |
---|
[331] | 5256 | update_last_client = 0; // update last client to dcache |
---|
| 5257 | } |
---|
| 5258 | r_cc_send_last_client = update_last_client; |
---|
| 5259 | |
---|
| 5260 | // if there is an actual request |
---|
| 5261 | if (r_dcache_cc_send_req.read() or r_icache_cc_send_req.read()) |
---|
| 5262 | { |
---|
| 5263 | // test if the new client is dcache and has a cleanup request |
---|
| 5264 | if ( (update_last_client == 0) and (r_dcache_cc_send_type.read() == CC_TYPE_CLEANUP)) |
---|
| 5265 | r_cc_send_fsm = CC_SEND_CLEANUP_1; |
---|
| 5266 | // test if the new client is dcache and has a multi acknowledgement request |
---|
| 5267 | else if ( (update_last_client == 0) and (r_dcache_cc_send_type.read() == CC_TYPE_MULTI_ACK)) |
---|
| 5268 | r_cc_send_fsm = CC_SEND_MULTI_ACK; |
---|
| 5269 | // test if the new client is icache and has a cleanup request |
---|
| 5270 | else if ( (update_last_client == 1) and (r_icache_cc_send_type.read() == CC_TYPE_CLEANUP)) |
---|
| 5271 | r_cc_send_fsm = CC_SEND_CLEANUP_1; |
---|
| 5272 | // test if the new client is icache and has a multi acknowledgement request |
---|
| 5273 | else if ( (update_last_client == 1) and (r_icache_cc_send_type.read() == CC_TYPE_MULTI_ACK)) |
---|
| 5274 | r_cc_send_fsm = CC_SEND_MULTI_ACK; |
---|
| 5275 | } |
---|
| 5276 | break; |
---|
| 5277 | } |
---|
| 5278 | /////////////////////////// |
---|
| 5279 | case CC_SEND_CLEANUP_1: |
---|
| 5280 | { |
---|
| 5281 | // wait for the first flit to be consumed |
---|
[333] | 5282 | if (p_dspin_out.read.read()) |
---|
[331] | 5283 | r_cc_send_fsm = CC_SEND_CLEANUP_2; |
---|
| 5284 | |
---|
| 5285 | break; |
---|
| 5286 | } |
---|
| 5287 | /////////////////////////// |
---|
| 5288 | case CC_SEND_CLEANUP_2: |
---|
| 5289 | { |
---|
| 5290 | // wait for the second flit to be consumed |
---|
[333] | 5291 | if (p_dspin_out.read.read()) |
---|
[331] | 5292 | { |
---|
[333] | 5293 | if (r_cc_send_last_client.read() == 0) // dcache active request |
---|
[331] | 5294 | r_dcache_cc_send_req = false; // reset dcache request |
---|
| 5295 | else // icache active request |
---|
| 5296 | r_icache_cc_send_req = false; // reset icache request |
---|
| 5297 | |
---|
| 5298 | // go back to idle state |
---|
| 5299 | r_cc_send_fsm = CC_SEND_IDLE; |
---|
| 5300 | } |
---|
| 5301 | break; |
---|
| 5302 | } |
---|
| 5303 | /////////////////////////// |
---|
| 5304 | case CC_SEND_MULTI_ACK: |
---|
| 5305 | { |
---|
| 5306 | // wait for the flit to be consumed |
---|
| 5307 | if(p_dspin_out.read.read()) |
---|
| 5308 | { |
---|
| 5309 | if(r_cc_send_last_client.read() == 0) // dcache active request |
---|
| 5310 | r_dcache_cc_send_req = false; // reset dcache request |
---|
| 5311 | else // icache active request |
---|
| 5312 | r_icache_cc_send_req = false; // reset icache request |
---|
| 5313 | // go back to idle state |
---|
| 5314 | r_cc_send_fsm = CC_SEND_IDLE; |
---|
| 5315 | } |
---|
| 5316 | break; |
---|
| 5317 | } |
---|
| 5318 | } // end switch CC_SEND FSM |
---|
| 5319 | |
---|
| 5320 | /////////////////////////////////////////////////////////////////////////////// |
---|
| 5321 | // C_RECEIVE FSM |
---|
| 5322 | // This FSM receive all coherence packets on a DSPIN40 port. |
---|
| 5323 | // There is 4 packet types: |
---|
| 5324 | // - CC_DATA_INVAL : DCACHE invalidate request |
---|
| 5325 | // - CC_DATA_UPDT : DCACHE update request (multi-words) |
---|
| 5326 | // - CC_INST_INVAL : ICACHE invalidate request |
---|
| 5327 | // - CC_INST_UPDT : ICACHE update request (multi-words) |
---|
| 5328 | // - CC_BROADCAST : Broadcast invalidate request (both DCACHE & ICACHE) |
---|
| 5329 | // - CC_DATA_CLACK : DCACHE cleanup acknowledge |
---|
| 5330 | // - CC_INST_CLACK : ICACHE cleanup acknowledge |
---|
| 5331 | ////////////////////////////////////////////////////////////////////////////// |
---|
| 5332 | switch( r_cc_receive_fsm.read() ) |
---|
| 5333 | { |
---|
| 5334 | ///////////////////// |
---|
| 5335 | case CC_RECEIVE_IDLE: |
---|
| 5336 | { |
---|
| 5337 | // a coherence request has arrived |
---|
| 5338 | if (p_dspin_in.write.read()) |
---|
| 5339 | { |
---|
| 5340 | // initialize dspin received data |
---|
| 5341 | uint64_t receive_data = p_dspin_in.data.read(); |
---|
| 5342 | // initialize coherence packet type |
---|
| 5343 | uint64_t receive_type = DspinDhccpParam::dspin_get(receive_data,DspinDhccpParam::FROM_MC_TYPE); |
---|
| 5344 | // initialize data/ins flip_flop (0 data / 1 ins) |
---|
| 5345 | r_cc_receive_data_ins = (bool)(receive_type & 0x1); |
---|
| 5346 | // test for a broadcast |
---|
| 5347 | if (DspinDhccpParam::dspin_get(receive_data,DspinDhccpParam::FROM_MC_BC)) |
---|
| 5348 | { |
---|
| 5349 | r_cc_receive_fsm = CC_RECEIVE_BRDCAST_HEADER; |
---|
| 5350 | } |
---|
| 5351 | // test for a CLACK |
---|
| 5352 | else if ((receive_type == DspinDhccpParam::TYPE_CLEANUP_ACK_DATA) or |
---|
| 5353 | (receive_type == DspinDhccpParam::TYPE_CLEANUP_ACK_INST)) |
---|
| 5354 | { |
---|
| 5355 | r_cc_receive_fsm = CC_RECEIVE_CLACK; |
---|
| 5356 | } |
---|
| 5357 | // test for a multi updt |
---|
| 5358 | else if ((receive_type == DspinDhccpParam::TYPE_MULTI_UPDT_DATA) or |
---|
| 5359 | (receive_type == DspinDhccpParam::TYPE_MULTI_UPDT_INST)) |
---|
| 5360 | { |
---|
| 5361 | r_cc_receive_fsm = CC_RECEIVE_UPDT_HEADER; |
---|
| 5362 | } |
---|
| 5363 | // test for a multi inval |
---|
| 5364 | else |
---|
| 5365 | { |
---|
| 5366 | r_cc_receive_fsm = CC_RECEIVE_INVAL_HEADER; |
---|
| 5367 | } |
---|
| 5368 | } |
---|
| 5369 | break; |
---|
| 5370 | } |
---|
| 5371 | ////////////////////// |
---|
| 5372 | case CC_RECEIVE_CLACK: |
---|
| 5373 | { |
---|
| 5374 | // initialize dspin received data |
---|
| 5375 | uint64_t receive_data = p_dspin_in.data.read(); |
---|
| 5376 | |
---|
| 5377 | // for data CLACK, wait for dcache to take the request |
---|
| 5378 | if ((r_cc_receive_data_ins.read() == 0) and not (r_cc_receive_dcache_req.read())) |
---|
| 5379 | { |
---|
| 5380 | // request dcache to handle the CLACK |
---|
| 5381 | r_cc_receive_dcache_req = true; |
---|
| 5382 | r_cc_receive_dcache_set = DspinDhccpParam::dspin_get(receive_data,DspinDhccpParam::CLEANUP_ACK_SET) & ((1ULL<<(uint32_log2(m_dcache_sets)))-1); |
---|
| 5383 | r_cc_receive_dcache_way = DspinDhccpParam::dspin_get(receive_data,DspinDhccpParam::CLEANUP_ACK_WAY) & ((1ULL<<(uint32_log2(m_dcache_ways)))-1); |
---|
| 5384 | r_cc_receive_dcache_type = CC_TYPE_CLACK; |
---|
| 5385 | // get back to idle state |
---|
| 5386 | r_cc_receive_fsm = CC_RECEIVE_IDLE; |
---|
| 5387 | break; |
---|
| 5388 | } |
---|
| 5389 | // for ins CLACK, wait for icache to take the request |
---|
| 5390 | if ((r_cc_receive_data_ins.read() == 1) and not (r_cc_receive_icache_req.read())) |
---|
| 5391 | { |
---|
| 5392 | // request icache to handle the CLACK |
---|
| 5393 | r_cc_receive_icache_req = true; |
---|
| 5394 | r_cc_receive_icache_set = DspinDhccpParam::dspin_get(receive_data,DspinDhccpParam::CLEANUP_ACK_SET) & ((1ULL<<(uint32_log2(m_icache_sets)))-1); |
---|
| 5395 | r_cc_receive_icache_way = DspinDhccpParam::dspin_get(receive_data,DspinDhccpParam::CLEANUP_ACK_WAY) & ((1ULL<<(uint32_log2(m_icache_ways)))-1); |
---|
| 5396 | r_cc_receive_icache_type = CC_TYPE_CLACK; |
---|
| 5397 | // get back to idle state |
---|
| 5398 | r_cc_receive_fsm = CC_RECEIVE_IDLE; |
---|
| 5399 | break; |
---|
| 5400 | } |
---|
| 5401 | // keep waiting for the correct cache to accept the request |
---|
| 5402 | break; |
---|
| 5403 | } |
---|
| 5404 | /////////////////////////////// |
---|
| 5405 | case CC_RECEIVE_BRDCAST_HEADER: |
---|
| 5406 | { |
---|
| 5407 | // no actual data in the HEADER, just skip to second flit |
---|
| 5408 | r_cc_receive_fsm = CC_RECEIVE_BRDCAST_NLINE; |
---|
| 5409 | break; |
---|
| 5410 | } |
---|
| 5411 | ////////////////////////////// |
---|
| 5412 | case CC_RECEIVE_BRDCAST_NLINE: |
---|
| 5413 | { |
---|
| 5414 | // initialize dspin received data |
---|
| 5415 | uint64_t receive_data = p_dspin_in.data.read(); |
---|
| 5416 | // wait for both dcache and icache to take the request |
---|
| 5417 | // TODO maybe we need to wait for both only to leave the state, but |
---|
| 5418 | // not to actually post a request to an available cache => need a |
---|
| 5419 | // flip_flop to check that ? |
---|
[355] | 5420 | if (not (r_cc_receive_icache_req.read()) and not (r_cc_receive_dcache_req.read()) and (p_dspin_in.write.read())) |
---|
[331] | 5421 | { |
---|
| 5422 | // request dcache to handle the BROADCAST |
---|
| 5423 | r_cc_receive_dcache_req = true; |
---|
| 5424 | r_cc_receive_dcache_nline = DspinDhccpParam::dspin_get(receive_data,DspinDhccpParam::BROADCAST_NLINE); |
---|
| 5425 | r_cc_receive_dcache_type = CC_TYPE_BRDCAST; |
---|
| 5426 | // request icache to handle the BROADCAST |
---|
| 5427 | r_cc_receive_icache_req = true; |
---|
| 5428 | r_cc_receive_icache_nline = DspinDhccpParam::dspin_get(receive_data,DspinDhccpParam::BROADCAST_NLINE); |
---|
| 5429 | r_cc_receive_icache_type = CC_TYPE_BRDCAST; |
---|
| 5430 | // get back to idle state |
---|
| 5431 | r_cc_receive_fsm = CC_RECEIVE_IDLE; |
---|
| 5432 | break; |
---|
| 5433 | } |
---|
| 5434 | // keep waiting for the caches to accept the request |
---|
| 5435 | break; |
---|
| 5436 | } |
---|
| 5437 | ///////////////////////////// |
---|
| 5438 | case CC_RECEIVE_INVAL_HEADER: |
---|
| 5439 | { |
---|
[346] | 5440 | // sample updt tab index in the HEADER, then skip to second flit |
---|
[331] | 5441 | uint64_t receive_data = p_dspin_in.data.read(); |
---|
| 5442 | // for data INVAL, wait for dcache to take the request |
---|
| 5443 | if ((r_cc_receive_data_ins.read() == 0) and not (r_cc_receive_dcache_req.read())) |
---|
| 5444 | { |
---|
| 5445 | r_cc_receive_dcache_updt_tab_idx = DspinDhccpParam::dspin_get(receive_data,DspinDhccpParam::MULTI_INVAL_UPDT_INDEX); |
---|
| 5446 | r_cc_receive_fsm = CC_RECEIVE_INVAL_NLINE; |
---|
| 5447 | break; |
---|
| 5448 | } |
---|
| 5449 | // for ins INVAL, wait for icache to take the request |
---|
| 5450 | if ((r_cc_receive_data_ins.read() == 1) and not (r_cc_receive_icache_req.read())) |
---|
| 5451 | { |
---|
| 5452 | r_cc_receive_icache_updt_tab_idx = DspinDhccpParam::dspin_get(receive_data,DspinDhccpParam::MULTI_INVAL_UPDT_INDEX); |
---|
| 5453 | r_cc_receive_fsm = CC_RECEIVE_INVAL_NLINE; |
---|
| 5454 | break; |
---|
| 5455 | } |
---|
| 5456 | // keep waiting for the correct cache to accept the request |
---|
| 5457 | break; |
---|
| 5458 | } |
---|
| 5459 | //////////////////////////// |
---|
| 5460 | case CC_RECEIVE_INVAL_NLINE: |
---|
| 5461 | { |
---|
| 5462 | // sample nline in the second flit |
---|
| 5463 | uint64_t receive_data = p_dspin_in.data.read(); |
---|
| 5464 | // for data INVAL, wait for dcache to take the request |
---|
[355] | 5465 | if ((r_cc_receive_data_ins.read() == 0) and not (r_cc_receive_dcache_req.read()) and (p_dspin_in.write.read())) |
---|
[331] | 5466 | { |
---|
| 5467 | // request dcache to handle the INVAL |
---|
| 5468 | r_cc_receive_dcache_req = true; |
---|
| 5469 | r_cc_receive_dcache_nline = DspinDhccpParam::dspin_get(receive_data,DspinDhccpParam::MULTI_INVAL_NLINE); |
---|
| 5470 | r_cc_receive_dcache_type = CC_TYPE_INVAL; |
---|
| 5471 | // get back to idle state |
---|
| 5472 | r_cc_receive_fsm = CC_RECEIVE_IDLE; |
---|
| 5473 | break; |
---|
| 5474 | } |
---|
| 5475 | // for ins INVAL, wait for icache to take the request |
---|
[355] | 5476 | if ((r_cc_receive_data_ins.read() == 1) and not (r_cc_receive_icache_req.read()) and (p_dspin_in.write.read())) |
---|
[331] | 5477 | { |
---|
| 5478 | // request icache to handle the INVAL |
---|
| 5479 | r_cc_receive_icache_req = true; |
---|
| 5480 | r_cc_receive_icache_nline = DspinDhccpParam::dspin_get(receive_data,DspinDhccpParam::MULTI_INVAL_NLINE); |
---|
| 5481 | r_cc_receive_icache_type = CC_TYPE_INVAL; |
---|
| 5482 | // get back to idle state |
---|
| 5483 | r_cc_receive_fsm = CC_RECEIVE_IDLE; |
---|
| 5484 | break; |
---|
| 5485 | } |
---|
| 5486 | // we should never get there |
---|
| 5487 | assert ( false && "CC_RECEIVE_INVAL_NLINE : incoherent handling of either r_cc_receive_data_ins or r_cc_receive_*cache_req\n"); |
---|
| 5488 | } |
---|
| 5489 | //////////////////////////// |
---|
| 5490 | case CC_RECEIVE_UPDT_HEADER: |
---|
| 5491 | { |
---|
| 5492 | // sample updt tab index in the HEADER, than skip to second flit |
---|
| 5493 | uint64_t receive_data = p_dspin_in.data.read(); |
---|
| 5494 | // for data INVAL, wait for dcache to take the request and fifo to |
---|
| 5495 | // be empty |
---|
| 5496 | if ((r_cc_receive_data_ins.read() == 0) and not r_cc_receive_dcache_req.read() and r_cc_receive_updt_fifo_be.empty()) |
---|
| 5497 | { |
---|
| 5498 | r_cc_receive_dcache_updt_tab_idx = DspinDhccpParam::dspin_get(receive_data,DspinDhccpParam::MULTI_UPDT_UPDT_INDEX); |
---|
| 5499 | r_cc_receive_fsm = CC_RECEIVE_UPDT_NLINE; |
---|
| 5500 | break; |
---|
| 5501 | } |
---|
| 5502 | // for ins INVAL, wait for icache to take the request and fifo to be |
---|
| 5503 | // empty |
---|
| 5504 | if ((r_cc_receive_data_ins.read() == 1) and not r_cc_receive_icache_req.read() and r_cc_receive_updt_fifo_be.empty()) |
---|
| 5505 | { |
---|
| 5506 | r_cc_receive_icache_updt_tab_idx = DspinDhccpParam::dspin_get(receive_data,DspinDhccpParam::MULTI_UPDT_UPDT_INDEX); |
---|
| 5507 | r_cc_receive_fsm = CC_RECEIVE_UPDT_NLINE; |
---|
| 5508 | break; |
---|
| 5509 | } |
---|
| 5510 | // keep waiting for the correct cache to accept the request |
---|
| 5511 | break; |
---|
| 5512 | } |
---|
| 5513 | /////////////////////////// |
---|
| 5514 | case CC_RECEIVE_UPDT_NLINE: |
---|
| 5515 | { |
---|
| 5516 | // sample nline and word index in the second flit |
---|
| 5517 | uint64_t receive_data = p_dspin_in.data.read(); |
---|
| 5518 | // for data INVAL, wait for dcache to take the request and fifo to |
---|
| 5519 | // be empty |
---|
[355] | 5520 | if ((r_cc_receive_data_ins.read() == 0) and not (r_cc_receive_dcache_req.read()) and r_cc_receive_updt_fifo_be.empty() and (p_dspin_in.write.read())) |
---|
[331] | 5521 | { |
---|
| 5522 | r_cc_receive_dcache_nline = DspinDhccpParam::dspin_get(receive_data,DspinDhccpParam::MULTI_UPDT_NLINE); |
---|
| 5523 | r_cc_receive_word_idx = DspinDhccpParam::dspin_get(receive_data,DspinDhccpParam::MULTI_UPDT_WORD_INDEX); |
---|
| 5524 | r_cc_receive_dcache_type = CC_TYPE_UPDT; |
---|
| 5525 | // get back to idle state |
---|
| 5526 | r_cc_receive_fsm = CC_RECEIVE_UPDT_DATA; |
---|
| 5527 | break; |
---|
| 5528 | } |
---|
| 5529 | // for ins INVAL, wait for icache to take the request and fifo to be |
---|
| 5530 | // empty |
---|
[355] | 5531 | if ((r_cc_receive_data_ins.read() == 1) and not (r_cc_receive_icache_req.read()) and r_cc_receive_updt_fifo_be.empty() and (p_dspin_in.write.read())) |
---|
[331] | 5532 | { |
---|
| 5533 | r_cc_receive_icache_nline = DspinDhccpParam::dspin_get(receive_data,DspinDhccpParam::MULTI_UPDT_NLINE); |
---|
| 5534 | r_cc_receive_word_idx = DspinDhccpParam::dspin_get(receive_data,DspinDhccpParam::MULTI_UPDT_WORD_INDEX); |
---|
| 5535 | r_cc_receive_icache_type = CC_TYPE_UPDT; |
---|
| 5536 | // get back to idle state |
---|
| 5537 | r_cc_receive_fsm = CC_RECEIVE_UPDT_DATA; |
---|
| 5538 | break; |
---|
| 5539 | } |
---|
| 5540 | // we should never get there |
---|
| 5541 | assert ( false && "CC_RECEIVE_UPDT_NLINE : incoherent handling of either r_cc_receive_data_ins or r_cc_receive_*cache_req or r_cc_receive_fifo\n"); |
---|
| 5542 | break; |
---|
| 5543 | } |
---|
| 5544 | ////////////////////////// |
---|
| 5545 | case CC_RECEIVE_UPDT_DATA: |
---|
| 5546 | { |
---|
[355] | 5547 | if ((r_cc_receive_data_ins.read() == 0) and not (r_cc_receive_dcache_req.read()) and (p_dspin_in.write.read())) |
---|
[331] | 5548 | r_cc_receive_dcache_req = true; |
---|
[355] | 5549 | if ((r_cc_receive_data_ins.read() == 1) and not (r_cc_receive_icache_req.read()) and (p_dspin_in.write.read())) |
---|
[331] | 5550 | r_cc_receive_icache_req = true; |
---|
| 5551 | |
---|
| 5552 | // sample data, be and eop |
---|
| 5553 | uint64_t receive_data = p_dspin_in.data.read(); |
---|
| 5554 | // wait for the fifo |
---|
[355] | 5555 | if (r_cc_receive_updt_fifo_be.wok() and (p_dspin_in.write.read())) |
---|
[331] | 5556 | { |
---|
| 5557 | cc_receive_updt_fifo_be = DspinDhccpParam::dspin_get(receive_data,DspinDhccpParam::MULTI_UPDT_BE); |
---|
| 5558 | cc_receive_updt_fifo_data = DspinDhccpParam::dspin_get(receive_data,DspinDhccpParam::MULTI_UPDT_DATA); |
---|
| 5559 | // sample eop to test for state exit |
---|
| 5560 | bool flit_eop = DspinDhccpParam::dspin_get(receive_data,DspinDhccpParam::FROM_MC_EOP); |
---|
| 5561 | cc_receive_updt_fifo_eop = flit_eop; |
---|
| 5562 | cc_receive_updt_fifo_put = true; |
---|
| 5563 | if(flit_eop) |
---|
| 5564 | r_cc_receive_fsm = CC_RECEIVE_IDLE; |
---|
| 5565 | } |
---|
| 5566 | break; |
---|
| 5567 | } |
---|
| 5568 | } // end switch CC_RECEIVE FSM |
---|
| 5569 | |
---|
| 5570 | ///////////////// Response FIFOs update ////////////////////// |
---|
| 5571 | r_vci_rsp_fifo_icache.update(vci_rsp_fifo_icache_get, |
---|
| 5572 | vci_rsp_fifo_icache_put, |
---|
| 5573 | vci_rsp_fifo_icache_data); |
---|
| 5574 | |
---|
| 5575 | r_vci_rsp_fifo_dcache.update(vci_rsp_fifo_dcache_get, |
---|
| 5576 | vci_rsp_fifo_dcache_put, |
---|
| 5577 | vci_rsp_fifo_dcache_data); |
---|
[346] | 5578 | |
---|
[331] | 5579 | ///////////////// updt FIFO update ////////////////////// |
---|
| 5580 | //TODO check this |
---|
| 5581 | r_cc_receive_updt_fifo_be.update(cc_receive_updt_fifo_get, |
---|
| 5582 | cc_receive_updt_fifo_put, |
---|
| 5583 | cc_receive_updt_fifo_be); |
---|
| 5584 | r_cc_receive_updt_fifo_data.update(cc_receive_updt_fifo_get, |
---|
| 5585 | cc_receive_updt_fifo_put, |
---|
| 5586 | cc_receive_updt_fifo_data); |
---|
| 5587 | r_cc_receive_updt_fifo_eop.update(cc_receive_updt_fifo_get, |
---|
| 5588 | cc_receive_updt_fifo_put, |
---|
| 5589 | cc_receive_updt_fifo_eop); |
---|
| 5590 | |
---|
| 5591 | } // end transition() |
---|
| 5592 | |
---|
| 5593 | /////////////////////// |
---|
| 5594 | tmpl(void)::genMoore() |
---|
| 5595 | /////////////////////// |
---|
| 5596 | { |
---|
| 5597 | |
---|
| 5598 | // VCI initiator command on the direct network |
---|
| 5599 | // it depends on the CMD FSM state |
---|
| 5600 | |
---|
[336] | 5601 | bool is_sc_or_cas = (r_vci_cmd_fsm.read() == CMD_DATA_CAS) or |
---|
| 5602 | (r_vci_cmd_fsm.read() == CMD_DATA_SC ); |
---|
| 5603 | |
---|
[346] | 5604 | p_vci.pktid = 0; |
---|
| 5605 | p_vci.srcid = m_srcid; |
---|
| 5606 | p_vci.cons = is_sc_or_cas; |
---|
| 5607 | p_vci.contig = not is_sc_or_cas; |
---|
| 5608 | p_vci.wrap = false; |
---|
| 5609 | p_vci.clen = 0; |
---|
| 5610 | p_vci.cfixed = false; |
---|
[331] | 5611 | |
---|
| 5612 | switch ( r_vci_cmd_fsm.read() ) { |
---|
| 5613 | |
---|
| 5614 | case CMD_IDLE: |
---|
[346] | 5615 | p_vci.cmdval = false; |
---|
| 5616 | p_vci.address = 0; |
---|
| 5617 | p_vci.wdata = 0; |
---|
| 5618 | p_vci.be = 0; |
---|
| 5619 | p_vci.trdid = 0; |
---|
| 5620 | p_vci.pktid = 0; |
---|
| 5621 | p_vci.plen = 0; |
---|
| 5622 | p_vci.cmd = vci_param::CMD_NOP; |
---|
| 5623 | p_vci.eop = false; |
---|
[331] | 5624 | break; |
---|
| 5625 | |
---|
| 5626 | case CMD_INS_MISS: |
---|
[346] | 5627 | p_vci.cmdval = true; |
---|
| 5628 | p_vci.address = r_icache_vci_paddr.read() & m_icache_yzmask; |
---|
| 5629 | p_vci.wdata = 0; |
---|
| 5630 | p_vci.be = 0xF; |
---|
| 5631 | p_vci.trdid = 0; |
---|
| 5632 | p_vci.pktid = TYPE_READ_INS_MISS; |
---|
| 5633 | p_vci.plen = m_icache_words<<2; |
---|
| 5634 | p_vci.cmd = vci_param::CMD_READ; |
---|
| 5635 | p_vci.eop = true; |
---|
[331] | 5636 | break; |
---|
| 5637 | |
---|
| 5638 | case CMD_INS_UNC: |
---|
[346] | 5639 | p_vci.cmdval = true; |
---|
| 5640 | p_vci.address = r_icache_vci_paddr.read() & ~0x3; |
---|
| 5641 | p_vci.wdata = 0; |
---|
| 5642 | p_vci.be = 0xF; |
---|
| 5643 | p_vci.trdid = 0; |
---|
| 5644 | p_vci.pktid = TYPE_READ_INS_UNC; |
---|
| 5645 | p_vci.plen = 4; |
---|
| 5646 | p_vci.cmd = vci_param::CMD_READ; |
---|
| 5647 | p_vci.eop = true; |
---|
[331] | 5648 | break; |
---|
| 5649 | |
---|
| 5650 | case CMD_DATA_MISS: |
---|
[346] | 5651 | p_vci.cmdval = true; |
---|
| 5652 | p_vci.address = r_dcache_vci_paddr.read() & m_dcache_yzmask; |
---|
| 5653 | p_vci.wdata = 0; |
---|
| 5654 | p_vci.be = 0xF; |
---|
| 5655 | p_vci.trdid = 0; |
---|
| 5656 | p_vci.pktid = TYPE_READ_DATA_MISS; |
---|
| 5657 | p_vci.plen = m_dcache_words << 2; |
---|
| 5658 | p_vci.cmd = vci_param::CMD_READ; |
---|
| 5659 | p_vci.eop = true; |
---|
[331] | 5660 | break; |
---|
| 5661 | |
---|
| 5662 | case CMD_DATA_UNC: |
---|
[346] | 5663 | p_vci.cmdval = true; |
---|
| 5664 | p_vci.address = r_dcache_vci_paddr.read() & ~0x3; |
---|
| 5665 | p_vci.wdata = 0; |
---|
| 5666 | p_vci.be = r_dcache_vci_unc_be.read(); |
---|
| 5667 | p_vci.trdid = 0; |
---|
| 5668 | p_vci.pktid = TYPE_READ_DATA_UNC; |
---|
| 5669 | p_vci.plen = 4; |
---|
| 5670 | p_vci.cmd = vci_param::CMD_READ; |
---|
| 5671 | p_vci.eop = true; |
---|
[331] | 5672 | break; |
---|
| 5673 | |
---|
| 5674 | case CMD_DATA_WRITE: |
---|
[346] | 5675 | p_vci.cmdval = true; |
---|
| 5676 | p_vci.address = r_wbuf.getAddress(r_vci_cmd_cpt.read()) & ~0x3; |
---|
| 5677 | p_vci.wdata = r_wbuf.getData(r_vci_cmd_cpt.read()); |
---|
| 5678 | p_vci.be = r_wbuf.getBe(r_vci_cmd_cpt.read()); |
---|
| 5679 | p_vci.trdid = r_wbuf.getIndex(); |
---|
| 5680 | p_vci.pktid = TYPE_WRITE; |
---|
| 5681 | p_vci.plen = (r_vci_cmd_max.read() - r_vci_cmd_min.read() + 1) << 2; |
---|
| 5682 | p_vci.cmd = vci_param::CMD_WRITE; |
---|
| 5683 | p_vci.eop = (r_vci_cmd_cpt.read() == r_vci_cmd_max.read()); |
---|
[331] | 5684 | break; |
---|
| 5685 | |
---|
| 5686 | case CMD_DATA_LL: |
---|
[346] | 5687 | p_vci.cmdval = true; |
---|
| 5688 | p_vci.address = r_dcache_vci_paddr.read() & ~0x3; |
---|
| 5689 | p_vci.wdata = 0; |
---|
| 5690 | p_vci.be = 0xF; |
---|
| 5691 | p_vci.trdid = 0; |
---|
| 5692 | p_vci.pktid = TYPE_LL; |
---|
| 5693 | p_vci.plen = 8; |
---|
| 5694 | p_vci.cmd = vci_param::CMD_LOCKED_READ; |
---|
| 5695 | p_vci.eop = true; |
---|
[331] | 5696 | break; |
---|
| 5697 | |
---|
| 5698 | case CMD_DATA_SC: |
---|
[346] | 5699 | p_vci.cmdval = true; |
---|
| 5700 | p_vci.address = r_dcache_vci_paddr.read() & ~0x3; |
---|
| 5701 | if ( r_vci_cmd_cpt.read() == 0 ) p_vci.wdata = r_dcache_llsc_key.read(); |
---|
| 5702 | else p_vci.wdata = r_dcache_vci_sc_data.read(); |
---|
| 5703 | p_vci.be = 0xF; |
---|
| 5704 | p_vci.trdid = 0; |
---|
| 5705 | p_vci.pktid = TYPE_SC; |
---|
| 5706 | p_vci.plen = 8; |
---|
| 5707 | p_vci.cmd = vci_param::CMD_NOP; |
---|
| 5708 | p_vci.eop = (r_vci_cmd_cpt.read() == 1); |
---|
[331] | 5709 | break; |
---|
| 5710 | |
---|
| 5711 | case CMD_DATA_CAS: |
---|
[346] | 5712 | p_vci.cmdval = true; |
---|
| 5713 | p_vci.address = r_dcache_vci_paddr.read() & ~0x3; |
---|
| 5714 | if ( r_vci_cmd_cpt.read() == 0 ) p_vci.wdata = r_dcache_vci_cas_old.read(); |
---|
| 5715 | else p_vci.wdata = r_dcache_vci_cas_new.read(); |
---|
| 5716 | p_vci.be = 0xF; |
---|
| 5717 | p_vci.trdid = 0; |
---|
| 5718 | p_vci.pktid = TYPE_CAS; |
---|
| 5719 | p_vci.plen = 8; |
---|
| 5720 | p_vci.cmd = vci_param::CMD_NOP; |
---|
| 5721 | p_vci.eop = (r_vci_cmd_cpt.read() == 1); |
---|
[331] | 5722 | break; |
---|
| 5723 | } // end switch r_vci_cmd_fsm |
---|
| 5724 | |
---|
| 5725 | // VCI initiator response on the direct network |
---|
[346] | 5726 | // it depends on the VCI_RSP FSM |
---|
[331] | 5727 | |
---|
| 5728 | switch (r_vci_rsp_fsm.read() ) |
---|
| 5729 | { |
---|
[346] | 5730 | case RSP_DATA_WRITE : p_vci.rspack = true; break; |
---|
| 5731 | case RSP_INS_MISS : p_vci.rspack = r_vci_rsp_fifo_icache.wok(); break; |
---|
| 5732 | case RSP_INS_UNC : p_vci.rspack = r_vci_rsp_fifo_icache.wok(); break; |
---|
| 5733 | case RSP_DATA_MISS : p_vci.rspack = r_vci_rsp_fifo_dcache.wok(); break; |
---|
| 5734 | case RSP_DATA_UNC : p_vci.rspack = r_vci_rsp_fifo_dcache.wok(); break; |
---|
| 5735 | case RSP_DATA_LL : p_vci.rspack = r_vci_rsp_fifo_dcache.wok(); break; |
---|
| 5736 | case RSP_IDLE : p_vci.rspack = false; break; |
---|
[331] | 5737 | } // end switch r_vci_rsp_fsm |
---|
| 5738 | |
---|
[346] | 5739 | |
---|
| 5740 | // Send coherence packets on DSPIN L2M |
---|
| 5741 | // it depends on the CC_SEND FSM |
---|
| 5742 | |
---|
[331] | 5743 | uint64_t dspin_send_data = 0; |
---|
| 5744 | switch ( r_cc_send_fsm.read() ) |
---|
| 5745 | { |
---|
[346] | 5746 | ////////////////// |
---|
[331] | 5747 | case CC_SEND_IDLE: |
---|
| 5748 | { |
---|
| 5749 | p_dspin_out.write = false; |
---|
| 5750 | break; |
---|
| 5751 | } |
---|
[346] | 5752 | /////////////////////// |
---|
[331] | 5753 | case CC_SEND_CLEANUP_1: |
---|
| 5754 | { |
---|
| 5755 | // initialize dspin send data |
---|
[346] | 5756 | DspinDhccpParam::dspin_set(dspin_send_data, |
---|
| 5757 | 0, |
---|
| 5758 | DspinDhccpParam::FROM_L1_EOP); |
---|
| 5759 | DspinDhccpParam::dspin_set(dspin_send_data, |
---|
| 5760 | m_cc_global_id, |
---|
| 5761 | DspinDhccpParam::CLEANUP_SRCID); |
---|
| 5762 | DspinDhccpParam::dspin_set(dspin_send_data, |
---|
| 5763 | 0, |
---|
| 5764 | DspinDhccpParam::FROM_L1_BC); |
---|
| 5765 | |
---|
| 5766 | if(r_cc_send_last_client.read() == 0) // dcache active request |
---|
[331] | 5767 | { |
---|
[369] | 5768 | uint64_t dest = (uint64_t) r_dcache_cc_send_nline.read() |
---|
[346] | 5769 | >> (m_nline_width - m_x_width - m_y_width) |
---|
| 5770 | << (DspinDhccpParam::GLOBALID_WIDTH - m_x_width - m_y_width); |
---|
| 5771 | |
---|
[331] | 5772 | DspinDhccpParam::dspin_set(dspin_send_data, |
---|
[346] | 5773 | dest, |
---|
| 5774 | DspinDhccpParam::CLEANUP_DEST); |
---|
[331] | 5775 | |
---|
| 5776 | DspinDhccpParam::dspin_set(dspin_send_data, |
---|
[346] | 5777 | r_dcache_cc_send_nline.read() & 0x300000000ULL, |
---|
| 5778 | DspinDhccpParam::CLEANUP_NLINE_MSB); |
---|
[331] | 5779 | |
---|
| 5780 | DspinDhccpParam::dspin_set(dspin_send_data, |
---|
[346] | 5781 | r_dcache_cc_send_way.read(), |
---|
| 5782 | DspinDhccpParam::CLEANUP_WAY_INDEX); |
---|
[331] | 5783 | |
---|
| 5784 | DspinDhccpParam::dspin_set(dspin_send_data, |
---|
[346] | 5785 | DspinDhccpParam::TYPE_CLEANUP_DATA, |
---|
| 5786 | DspinDhccpParam::FROM_L1_TYPE); |
---|
[331] | 5787 | } |
---|
[346] | 5788 | else // icache active request |
---|
[331] | 5789 | { |
---|
[369] | 5790 | uint64_t dest = (uint64_t) r_icache_cc_send_nline.read() |
---|
[346] | 5791 | >> (m_nline_width - m_x_width - m_y_width) |
---|
| 5792 | << (DspinDhccpParam::GLOBALID_WIDTH - m_x_width - m_y_width); |
---|
[331] | 5793 | |
---|
| 5794 | DspinDhccpParam::dspin_set(dspin_send_data, |
---|
[346] | 5795 | dest, |
---|
| 5796 | DspinDhccpParam::CLEANUP_DEST); |
---|
[331] | 5797 | |
---|
| 5798 | DspinDhccpParam::dspin_set(dspin_send_data, |
---|
[346] | 5799 | r_icache_cc_send_nline.read() & 0x300000000ULL, |
---|
| 5800 | DspinDhccpParam::CLEANUP_NLINE_MSB); |
---|
[331] | 5801 | |
---|
| 5802 | DspinDhccpParam::dspin_set(dspin_send_data, |
---|
[346] | 5803 | r_icache_cc_send_way.read(), |
---|
| 5804 | DspinDhccpParam::CLEANUP_WAY_INDEX); |
---|
[331] | 5805 | |
---|
| 5806 | DspinDhccpParam::dspin_set(dspin_send_data, |
---|
[346] | 5807 | DspinDhccpParam::TYPE_CLEANUP_INST, |
---|
| 5808 | DspinDhccpParam::FROM_L1_TYPE); |
---|
[331] | 5809 | } |
---|
| 5810 | // send flit |
---|
| 5811 | p_dspin_out.data = dspin_send_data; |
---|
| 5812 | p_dspin_out.write = true; |
---|
| 5813 | break; |
---|
| 5814 | } |
---|
[346] | 5815 | /////////////////////// |
---|
[331] | 5816 | case CC_SEND_CLEANUP_2: |
---|
| 5817 | { |
---|
| 5818 | // initialize dspin send data |
---|
[346] | 5819 | DspinDhccpParam::dspin_set(dspin_send_data, |
---|
| 5820 | 1, |
---|
| 5821 | DspinDhccpParam::FROM_L1_EOP); |
---|
| 5822 | |
---|
| 5823 | if(r_cc_send_last_client.read() == 0) // dcache active request |
---|
[331] | 5824 | { |
---|
| 5825 | DspinDhccpParam::dspin_set(dspin_send_data, |
---|
[346] | 5826 | r_dcache_cc_send_nline.read() & 0xFFFFFFFFULL, |
---|
| 5827 | DspinDhccpParam::CLEANUP_NLINE_LSB); |
---|
[331] | 5828 | } |
---|
[346] | 5829 | else // icache active request |
---|
[331] | 5830 | { |
---|
| 5831 | DspinDhccpParam::dspin_set(dspin_send_data, |
---|
[346] | 5832 | r_icache_cc_send_nline.read() & 0xFFFFFFFFULL, |
---|
| 5833 | DspinDhccpParam::CLEANUP_NLINE_LSB); |
---|
[331] | 5834 | } |
---|
| 5835 | // send flit |
---|
| 5836 | p_dspin_out.data = dspin_send_data; |
---|
| 5837 | p_dspin_out.write = true; |
---|
| 5838 | break; |
---|
| 5839 | } |
---|
[346] | 5840 | /////////////////////// |
---|
[331] | 5841 | case CC_SEND_MULTI_ACK: |
---|
| 5842 | { |
---|
| 5843 | // initialize dspin send data |
---|
| 5844 | DspinDhccpParam::dspin_set(dspin_send_data, |
---|
[346] | 5845 | 1, |
---|
| 5846 | DspinDhccpParam::FROM_L1_EOP); |
---|
| 5847 | DspinDhccpParam::dspin_set(dspin_send_data, |
---|
| 5848 | 0, |
---|
| 5849 | DspinDhccpParam::FROM_L1_BC); |
---|
| 5850 | DspinDhccpParam::dspin_set(dspin_send_data, |
---|
| 5851 | DspinDhccpParam::TYPE_MULTI_ACK, |
---|
| 5852 | DspinDhccpParam::FROM_L1_TYPE); |
---|
| 5853 | |
---|
| 5854 | if(r_cc_send_last_client.read() == 0) // dcache active request |
---|
[331] | 5855 | { |
---|
[369] | 5856 | uint64_t dest = (uint64_t) r_dcache_cc_send_nline.read() |
---|
[346] | 5857 | >> (m_nline_width - m_x_width - m_y_width) |
---|
| 5858 | << (DspinDhccpParam::GLOBALID_WIDTH - m_x_width - m_y_width); |
---|
| 5859 | |
---|
[331] | 5860 | DspinDhccpParam::dspin_set(dspin_send_data, |
---|
[346] | 5861 | dest, |
---|
| 5862 | DspinDhccpParam::MULTI_ACK_DEST); |
---|
[331] | 5863 | |
---|
| 5864 | DspinDhccpParam::dspin_set(dspin_send_data, |
---|
[346] | 5865 | r_dcache_cc_send_updt_tab_idx.read(), |
---|
| 5866 | DspinDhccpParam::MULTI_ACK_UPDT_INDEX); |
---|
[331] | 5867 | } |
---|
[346] | 5868 | else // icache active request |
---|
[331] | 5869 | { |
---|
[369] | 5870 | uint64_t dest = (uint64_t) r_icache_cc_send_nline.read() |
---|
[346] | 5871 | >> (m_nline_width - m_x_width - m_y_width) |
---|
| 5872 | << (DspinDhccpParam::GLOBALID_WIDTH - m_x_width - m_y_width); |
---|
| 5873 | |
---|
[331] | 5874 | |
---|
| 5875 | DspinDhccpParam::dspin_set(dspin_send_data, |
---|
[346] | 5876 | dest, |
---|
| 5877 | DspinDhccpParam::MULTI_ACK_DEST); |
---|
[331] | 5878 | |
---|
| 5879 | DspinDhccpParam::dspin_set(dspin_send_data, |
---|
[346] | 5880 | r_icache_cc_send_updt_tab_idx.read(), |
---|
| 5881 | DspinDhccpParam::MULTI_ACK_UPDT_INDEX); |
---|
[331] | 5882 | } |
---|
| 5883 | // send flit |
---|
| 5884 | p_dspin_out.data = dspin_send_data; |
---|
| 5885 | p_dspin_out.write = true; |
---|
[355] | 5886 | |
---|
[331] | 5887 | break; |
---|
| 5888 | } |
---|
| 5889 | } // end switch CC_SEND FSM |
---|
| 5890 | |
---|
[346] | 5891 | // Receive coherence packets |
---|
| 5892 | // It depends on the CC_RECEIVE FSM |
---|
| 5893 | |
---|
[331] | 5894 | switch( r_cc_receive_fsm.read() ) |
---|
| 5895 | { |
---|
| 5896 | ///////////////////// |
---|
| 5897 | case CC_RECEIVE_IDLE: |
---|
| 5898 | { |
---|
| 5899 | p_dspin_in.read = false; |
---|
| 5900 | break; |
---|
| 5901 | } |
---|
| 5902 | ////////////////////// |
---|
| 5903 | case CC_RECEIVE_CLACK: |
---|
| 5904 | { |
---|
| 5905 | if (((r_cc_receive_data_ins.read() == 0) and not (r_cc_receive_dcache_req.read())) or |
---|
| 5906 | ((r_cc_receive_data_ins.read() == 1) and not (r_cc_receive_icache_req.read()))) |
---|
| 5907 | p_dspin_in.read = true; |
---|
| 5908 | else |
---|
| 5909 | p_dspin_in.read = false; |
---|
| 5910 | break; |
---|
| 5911 | } |
---|
| 5912 | /////////////////////////////// |
---|
| 5913 | case CC_RECEIVE_BRDCAST_HEADER: |
---|
| 5914 | { |
---|
| 5915 | p_dspin_in.read = true; |
---|
| 5916 | break; |
---|
| 5917 | } |
---|
| 5918 | ////////////////////////////// |
---|
| 5919 | case CC_RECEIVE_BRDCAST_NLINE: |
---|
| 5920 | { |
---|
| 5921 | // TODO maybe we need to wait for both only to leave the state, but |
---|
| 5922 | // not to actually post a request to an available cache => need a |
---|
| 5923 | // flip_flop to check that ? |
---|
| 5924 | if (not (r_cc_receive_icache_req.read()) and not (r_cc_receive_dcache_req.read())) |
---|
| 5925 | p_dspin_in.read = true; |
---|
| 5926 | else |
---|
| 5927 | p_dspin_in.read = false; |
---|
| 5928 | break; |
---|
| 5929 | } |
---|
| 5930 | ///////////////////////////// |
---|
| 5931 | case CC_RECEIVE_INVAL_HEADER: |
---|
| 5932 | { |
---|
| 5933 | if (((r_cc_receive_data_ins.read() == 0) and not (r_cc_receive_dcache_req.read())) or |
---|
| 5934 | ((r_cc_receive_data_ins.read() == 1) and not (r_cc_receive_icache_req.read()))) |
---|
| 5935 | p_dspin_in.read = true; |
---|
| 5936 | else |
---|
| 5937 | p_dspin_in.read = false; |
---|
| 5938 | break; |
---|
| 5939 | } |
---|
| 5940 | //////////////////////////// |
---|
| 5941 | case CC_RECEIVE_INVAL_NLINE: |
---|
| 5942 | { |
---|
| 5943 | p_dspin_in.read = true; |
---|
| 5944 | break; |
---|
| 5945 | } |
---|
| 5946 | //////////////////////////// |
---|
| 5947 | case CC_RECEIVE_UPDT_HEADER: |
---|
| 5948 | { |
---|
| 5949 | if (((r_cc_receive_data_ins.read() == 0) and |
---|
| 5950 | not r_cc_receive_dcache_req.read() and |
---|
| 5951 | r_cc_receive_updt_fifo_be.empty()) |
---|
| 5952 | or |
---|
| 5953 | ((r_cc_receive_data_ins.read() == 1) and |
---|
| 5954 | not r_cc_receive_icache_req.read()) and |
---|
| 5955 | r_cc_receive_updt_fifo_be.empty()) |
---|
| 5956 | p_dspin_in.read = true; |
---|
| 5957 | else |
---|
| 5958 | p_dspin_in.read = false; |
---|
| 5959 | break; |
---|
| 5960 | } |
---|
| 5961 | /////////////////////////// |
---|
| 5962 | case CC_RECEIVE_UPDT_NLINE: |
---|
| 5963 | { |
---|
| 5964 | if (((r_cc_receive_data_ins.read() == 0) and |
---|
| 5965 | not (r_cc_receive_dcache_req.read()) and |
---|
| 5966 | r_cc_receive_updt_fifo_be.empty()) |
---|
| 5967 | or |
---|
| 5968 | ((r_cc_receive_data_ins.read() == 1) and |
---|
| 5969 | not (r_cc_receive_icache_req.read()) and |
---|
| 5970 | r_cc_receive_updt_fifo_be.empty())) |
---|
| 5971 | p_dspin_in.read = true; |
---|
| 5972 | else |
---|
| 5973 | p_dspin_in.read = false; |
---|
| 5974 | break; |
---|
| 5975 | } |
---|
| 5976 | ////////////////////////// |
---|
| 5977 | case CC_RECEIVE_UPDT_DATA: |
---|
| 5978 | { |
---|
| 5979 | if (r_cc_receive_updt_fifo_be.wok()) |
---|
| 5980 | p_dspin_in.read = true; |
---|
| 5981 | else |
---|
| 5982 | p_dspin_in.read = false; |
---|
| 5983 | break; |
---|
| 5984 | } |
---|
| 5985 | } // end switch CC_RECEIVE FSM |
---|
| 5986 | |
---|
| 5987 | } // end genMoore |
---|
| 5988 | |
---|
| 5989 | }} |
---|
| 5990 | |
---|
| 5991 | // Local Variables: |
---|
| 5992 | // tab-width: 4 |
---|
| 5993 | // c-basic-offset: 4 |
---|
| 5994 | // c-file-offsets:((innamespace . 0)(inline-open . 0)) |
---|
| 5995 | // indent-tabs-mode: nil |
---|
| 5996 | // End: |
---|
| 5997 | |
---|
| 5998 | // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=4:softtabstop=4 |
---|