[2] | 1 | /* -*- c++ -*- |
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| 2 | * |
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| 3 | * SOCLIB_LGPL_HEADER_BEGIN |
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| 4 | * |
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| 5 | * This file is part of SoCLib, GNU LGPLv2.1. |
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| 6 | * |
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| 7 | * SoCLib is free software; you can redistribute it and/or modify it |
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| 8 | * under the terms of the GNU Lesser General Public License as published |
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| 9 | * by the Free Software Foundation; version 2.1 of the License. |
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| 10 | * |
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| 11 | * SoCLib is distributed in the hope that it will be useful, but |
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| 12 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 14 | * Lesser General Public License for more details. |
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| 15 | * |
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| 16 | * You should have received a copy of the GNU Lesser General Public |
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| 17 | * License along with SoCLib; if not, write to the Free Software |
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| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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| 19 | * 02110-1301 USA |
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| 20 | * |
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| 21 | * SOCLIB_LGPL_HEADER_END |
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| 22 | * |
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| 23 | * Copyright (c) UPMC, Lip6, SoC |
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| 24 | * Alain Greiner <alain.greiner@lip6.fr>, 2008 |
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| 25 | * |
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| 26 | * Maintainers: alain |
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| 27 | * eric.guthmuller@polytechnique.edu |
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| 28 | * nipo |
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| 29 | * malek <abdelmalek.si-merabet@lip6.fr> |
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| 30 | */ |
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| 31 | |
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| 32 | ///////////////////////////////////////////////////////////////////////////// |
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| 33 | // History |
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| 34 | // - 25/04/2008 |
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| 35 | // The existing vci_xcache component has been extended to include |
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| 36 | // a VCI target port to support a directory based coherence protocol. |
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| 37 | // Three types of packets can be send by the L2 cache to the L1 cache |
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| 38 | // * MULTICAST INVALIDATE packets : length = 1 |
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| 39 | // * MULTICAST UPDATE packets : length = n + 2 |
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| 40 | // * BROADCAST INVALIDATE packets : length = 1 |
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| 41 | // The CLEANUP packets are sent by the L1 cache to the L2 cache, |
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| 42 | // to signal a replaced cache line. |
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| 43 | // - 12/08/2008 |
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| 44 | // The vci_cc_xcache_wrapper component instanciates directly the processsor |
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| 45 | // iss, in order to supress the processor/cache interface. |
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| 46 | // According to the VCI advanced specification, this component uses one |
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| 47 | // word VCI CMD packets for MISS transactions, and accept one word VCI RSP |
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| 48 | // packets for Write burst transactions. |
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| 49 | // The write buffer has been modified to use the WriteBuffer object. |
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| 50 | // A VCI write burst is constructed when two conditions are satisfied : |
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| 51 | // The processor make strictly successive write requests, and they are |
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| 52 | // in the same cache line. The write buffer performs re-ordering, to |
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| 53 | // respect the contiguous addresses VCI constraint. In case of several |
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| 54 | // WRITE_WORD requests in the same word, only the last request is conserved. |
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| 55 | // In case of several WRITE_HALF or WRITE_WORD requests in the same word, |
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[45] | 56 | // the requests are merged in the same word. In case of uncachable write |
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[2] | 57 | // requests, each request is transmited as a single VCI transaction. |
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| 58 | // Both the data & instruction caches can be flushed in one single cycle. |
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| 59 | // - 08/12/2009 |
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| 60 | // The update instruction coherence request (code 0XC) are supported. |
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| 61 | // - 26/12/2009 |
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| 62 | // The VCI_CC_XCACHE_WRAPPER_MULTI is derived from the VCI_CC_XCACHE_WRAPPER_V1 |
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| 63 | // to support several concurrent VCI transactions, in order to improve the CPI. |
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| 64 | // A new write buffer supporting simultaneous write transactions has been |
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| 65 | // introduced. The VCI command & response FSMs are not synchronized anymore: |
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| 66 | // The read requests can be transmitted before previous write requests |
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[45] | 67 | // (if the missing address does not match a pending write in the write buffer) |
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[2] | 68 | // and several read & write requests can be simultaneously transmitted. |
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| 69 | // The transactions can complete in any order, depending on the network. |
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| 70 | // Two new flip-flops have been introduced to signal completion of the |
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| 71 | // read transactions from the RSP FSM to the DCACHE & ICACHE FSMs: |
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| 72 | // r_rsp_data_ok, r_rsp_ins_ok |
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| 73 | // As simultaneous VCI transactions are supported, the TRDID & RTRDID fields |
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| 74 | // are used to transport the transaction index. |
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| 75 | // The transaction index has an odd value for a write transaction, depending |
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| 76 | // on the line index in the write buffer: PKTID = 2*wbuf_index + 1 |
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| 77 | // The transaction index has an even value for a read transaction, with only |
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[45] | 78 | // only four possible values, depending on cachable/uncachable & data/instruction. |
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[2] | 79 | // A new CLEANUP FSM has been introduced to transmit the cleanups |
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| 80 | // request from the DCACHE & ICACHE FSM on the coherence network. |
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[45] | 81 | // The LL/SC requests are still uncachable. |
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| 82 | // - 07/06/2010 |
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| 83 | // The DCACHE FSM has been modified to enforce a well defined consistency model: |
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| 84 | // 1) All uncachable acces (both read and write) are now blocking |
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| 85 | // the processor until the VCI response is received. |
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| 86 | // Uncachable access are considered as I/O access and must respect |
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| 87 | // a strict sequencial policy. |
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| 88 | // 2) For cachable access, the write buffer supports the "read after write" |
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| 89 | // rule, and the "write after write" rule : registered write requests |
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| 90 | // are tested before handling a read miss, and before locking a buffer line. |
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| 91 | // The MultiWriteBuffer component has been modified, to support |
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| 92 | // these rules, and to have an associative behavior: it can exist several |
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| 93 | // open lines, with a private time-out for each open line. |
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| 94 | // A printTrace() method has been defined. |
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[2] | 95 | /////////////////////////////////////////////////////////////////////////////// |
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| 96 | |
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| 97 | #include <cassert> |
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| 98 | #include "arithmetics.h" |
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| 99 | #include "../include/vci_cc_xcache_wrapper_multi.h" |
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| 100 | |
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| 101 | namespace soclib { |
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| 102 | namespace caba { |
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| 103 | |
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| 104 | namespace { |
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| 105 | const char *dcache_fsm_state_str[] = { |
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| 106 | "DCACHE_IDLE ", |
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| 107 | "DCACHE_WRITE_UPDT ", |
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| 108 | "DCACHE_WRITE_REQ ", |
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| 109 | "DCACHE_MISS_SELECT ", |
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| 110 | "DCACHE_MISS_CLEANUP", |
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| 111 | "DCACHE_MISS_WAIT ", |
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| 112 | "DCACHE_MISS_UPDT ", |
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| 113 | "DCACHE_UNC_WAIT ", |
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[45] | 114 | "DCACHE_UNC_GO ", |
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[2] | 115 | "DCACHE_INVAL ", |
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| 116 | "DCACHE_SYNC ", |
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| 117 | "DCACHE_ERROR ", |
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| 118 | "DCACHE_CC_CHECK ", |
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| 119 | "DCACHE_CC_INVAL ", |
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| 120 | "DCACHE_CC_UPDT ", |
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| 121 | }; |
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| 122 | const char *icache_fsm_state_str[] = { |
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| 123 | "ICACHE_IDLE ", |
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| 124 | "ICACHE_MISS_SELECT ", |
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| 125 | "ICACHE_MISS_CLEANUP", |
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| 126 | "ICACHE_MISS_WAIT ", |
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| 127 | "ICACHE_MISS_UPDT ", |
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| 128 | "ICACHE_UNC_WAIT ", |
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[45] | 129 | "ICACHE_UNC_GO ", |
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[2] | 130 | "ICACHE_ERROR ", |
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| 131 | "ICACHE_CC_CHECK ", |
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| 132 | "ICACHE_CC_INVAL ", |
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| 133 | "ICACHE_CC_UPDT ", |
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| 134 | }; |
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| 135 | const char *cmd_fsm_state_str[] = { |
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| 136 | "CMD_IDLE ", |
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| 137 | "CMD_INS_MISS ", |
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| 138 | "CMD_INS_UNC ", |
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| 139 | "CMD_DATA_MISS ", |
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| 140 | "CMD_DATA_UNC ", |
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| 141 | "CMD_DATA_WRITE", |
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| 142 | }; |
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| 143 | const char *rsp_fsm_state_str[] = { |
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| 144 | "RSP_IDLE ", |
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| 145 | "RSP_INS_MISS ", |
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| 146 | "RSP_INS_UNC ", |
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| 147 | "RSP_DATA_MISS ", |
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| 148 | "RSP_DATA_UNC ", |
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| 149 | "RSP_DATA_WRITE", |
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| 150 | }; |
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| 151 | const char *tgt_fsm_state_str[] = { |
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| 152 | "TGT_IDLE ", |
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| 153 | "TGT_UPDT_WORD ", |
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| 154 | "TGT_UPDT_DATA ", |
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| 155 | "TGT_REQ_BROADCAST", |
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| 156 | "TGT_REQ_ICACHE ", |
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| 157 | "TGT_REQ_DCACHE ", |
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| 158 | "TGT_RSP_BROADCAST", |
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| 159 | "TGT_RSP_ICACHE ", |
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| 160 | "TGT_RSP_DCACHE ", |
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| 161 | }; |
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| 162 | const char *cleanup_fsm_state_str[] = { |
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[45] | 163 | "CLEANUP_IDLE", |
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| 164 | "CLEANUP_DCACHE", |
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| 165 | "CLEANUP_ICACHE", |
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[2] | 166 | }; |
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| 167 | } |
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| 168 | |
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| 169 | #define tmpl(...) template<typename vci_param, typename iss_t> __VA_ARGS__ VciCcXCacheWrapperMulti<vci_param, iss_t> |
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| 170 | |
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| 171 | using soclib::common::uint32_log2; |
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| 172 | |
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| 173 | ///////////////////////////////////// |
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| 174 | tmpl(/**/)::VciCcXCacheWrapperMulti( |
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| 175 | sc_module_name name, |
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| 176 | int proc_id, |
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| 177 | const soclib::common::MappingTable &mtp, |
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| 178 | const soclib::common::MappingTable &mtc, |
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| 179 | const soclib::common::IntTab &initiator_index_p, |
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| 180 | const soclib::common::IntTab &initiator_index_c, |
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| 181 | const soclib::common::IntTab &target_index_c, |
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| 182 | size_t icache_ways, |
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| 183 | size_t icache_sets, |
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| 184 | size_t icache_words, |
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| 185 | size_t dcache_ways, |
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| 186 | size_t dcache_sets, |
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| 187 | size_t dcache_words, |
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| 188 | size_t wbuf_nwords, |
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[45] | 189 | size_t wbuf_nlines, |
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| 190 | size_t wbuf_timeout) |
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[2] | 191 | : |
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| 192 | soclib::caba::BaseModule(name), |
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| 193 | |
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| 194 | p_clk("clk"), |
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| 195 | p_resetn("resetn"), |
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| 196 | p_vci_ini_d("vci_ini_p"), |
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| 197 | p_vci_ini_c("vci_ini_c"), |
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| 198 | p_vci_tgt_c("vci_tgt_c"), |
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| 199 | |
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| 200 | m_cacheability_table(mtp.getCacheabilityTable<addr_t>()), |
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| 201 | m_segment(mtc.getSegment(target_index_c)), |
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| 202 | m_iss(this->name(), proc_id), |
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| 203 | m_srcid_d(mtp.indexForId(initiator_index_p)), |
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| 204 | m_srcid_c(mtc.indexForId(initiator_index_c)), |
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| 205 | |
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| 206 | m_dcache_ways(dcache_ways), |
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| 207 | m_dcache_words(dcache_words), |
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| 208 | m_dcache_yzmask((~0)<<(uint32_log2(dcache_words) + 2)), |
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| 209 | m_icache_ways(icache_ways), |
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| 210 | m_icache_words(icache_words), |
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| 211 | m_icache_yzmask((~0)<<(uint32_log2(icache_words) + 2)), |
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| 212 | |
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| 213 | r_dcache_fsm("r_dcache_fsm"), |
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| 214 | r_dcache_fsm_save("r_dcache_fsm_save"), |
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| 215 | r_dcache_addr_save("r_dcache_addr_save"), |
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| 216 | r_dcache_wdata_save("r_dcache_wdata_save"), |
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| 217 | r_dcache_rdata_save("r_dcache_rdata_save"), |
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| 218 | r_dcache_type_save("r_dcache_type_save"), |
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| 219 | r_dcache_be_save("r_dcache_be_save"), |
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| 220 | r_dcache_cleanup_save("r_dcache_cleanup_save"), |
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| 221 | r_dcache_way_save("r_dcache_way_save"), |
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| 222 | r_dcache_cleanup_req("r_dcache_cleanup_req"), |
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| 223 | r_dcache_cleanup_line("r_dcache_cleanup_line"), |
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| 224 | r_dcache_miss_req("r_dcache_miss_req"), |
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| 225 | r_dcache_unc_req("r_dcache_unc_req"), |
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| 226 | r_dcache_inval_pending("r_dcache_inval_pending"), |
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| 227 | |
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| 228 | r_icache_fsm("r_icache_fsm"), |
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| 229 | r_icache_fsm_save("r_icache_fsm_save"), |
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| 230 | r_icache_addr_save("r_icache_addr_save"), |
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| 231 | r_icache_cleanup_save("r_icache_cleanup_save"), |
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| 232 | r_icache_way_save("r_icache_way_save"), |
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| 233 | r_icache_miss_req("r_icache_miss_req"), |
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| 234 | r_icache_cleanup_req("r_icache_cleanup_req"), |
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| 235 | r_icache_cleanup_line("r_icache_cleanup_line"), |
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| 236 | r_icache_inval_pending("r_icache_inval_pending"), |
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| 237 | |
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| 238 | r_cmd_fsm("r_cmd_fsm"), |
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| 239 | r_cmd_min("r_cmd_min"), |
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| 240 | r_cmd_max("r_cmd_max"), |
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| 241 | r_cmd_cpt("r_cmd_cpt"), |
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| 242 | |
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| 243 | r_rsp_fsm("r_rsp_fsm"), |
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| 244 | r_rsp_ins_error("r_rsp_ins_error"), |
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| 245 | r_rsp_data_error("r_rsp_data_error"), |
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| 246 | r_rsp_cpt("r_rsp_cpt"), |
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| 247 | r_rsp_ins_ok("r_rsp_ins_ok"), |
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| 248 | r_rsp_data_ok("r_rsp_data_ok"), |
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| 249 | |
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| 250 | r_tgt_fsm("r_tgt_fsm"), |
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| 251 | r_tgt_addr("r_tgt_addr"), |
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| 252 | r_tgt_word("r_tgt_word"), |
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| 253 | r_tgt_update("r_tgt_update"), |
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| 254 | r_tgt_data("r_tgt_data"), |
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| 255 | r_tgt_srcid("r_tgt_srcid"), |
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| 256 | r_tgt_pktid("r_tgt_pktid"), |
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| 257 | r_tgt_trdid("r_tgt_trdid"), |
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| 258 | r_tgt_icache_req("r_tgt_icache_req"), |
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| 259 | r_tgt_dcache_req("r_tgt_dcache_req"), |
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| 260 | r_tgt_icache_rsp("r_tgt_icache_rsp"), |
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| 261 | r_tgt_dcache_rsp("r_tgt_dcache_rsp"), |
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| 262 | |
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| 263 | r_cleanup_fsm("r_cleanup_fsm"), |
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| 264 | |
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[47] | 265 | r_wbuf("r_wbuf", wbuf_nwords, wbuf_nlines, wbuf_timeout, dcache_words), |
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[2] | 266 | r_icache("icache", icache_ways, icache_sets, icache_words), |
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| 267 | r_dcache("dcache", dcache_ways, dcache_sets, dcache_words) |
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| 268 | |
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| 269 | { |
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[45] | 270 | assert( (icache_words*vci_param::B) < (1<<vci_param::K) && |
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| 271 | "I need more PLEN bits"); |
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[2] | 272 | |
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[45] | 273 | assert( (vci_param::T > 2) && ((1<<(vci_param::T-1)) >= wbuf_nlines) && |
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| 274 | "I need more TRDID bits"); |
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[2] | 275 | |
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| 276 | r_icache_miss_buf = new data_t[icache_words]; |
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| 277 | r_dcache_miss_buf = new data_t[dcache_words]; |
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| 278 | r_tgt_buf = new data_t[dcache_words]; |
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| 279 | r_tgt_val = new bool[dcache_words]; |
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| 280 | |
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| 281 | SC_METHOD(transition); |
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| 282 | dont_initialize(); |
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| 283 | sensitive << p_clk.pos(); |
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| 284 | |
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| 285 | SC_METHOD(genMoore); |
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| 286 | dont_initialize(); |
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| 287 | sensitive << p_clk.neg(); |
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| 288 | |
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| 289 | typename iss_t::CacheInfo cache_info; |
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| 290 | cache_info.has_mmu = false; |
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| 291 | cache_info.icache_line_size = icache_words*sizeof(data_t); |
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| 292 | cache_info.icache_assoc = icache_ways; |
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| 293 | cache_info.icache_n_lines = icache_sets; |
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| 294 | cache_info.dcache_line_size = dcache_words*sizeof(data_t); |
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| 295 | cache_info.dcache_assoc = dcache_ways; |
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| 296 | cache_info.dcache_n_lines = dcache_sets; |
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| 297 | m_iss.setCacheInfo(cache_info); |
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| 298 | |
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| 299 | } // end constructor |
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| 300 | |
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| 301 | ////////////////////////////////////// |
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| 302 | tmpl(/**/)::~VciCcXCacheWrapperMulti() |
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| 303 | { |
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| 304 | delete [] r_icache_miss_buf; |
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| 305 | delete [] r_dcache_miss_buf; |
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| 306 | delete [] r_tgt_val; |
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| 307 | delete [] r_tgt_buf; |
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| 308 | } |
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| 309 | |
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[45] | 310 | /////////////////////////////////// |
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| 311 | tmpl(void)::printTrace(size_t mode) |
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[2] | 312 | { |
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[45] | 313 | typename iss_t::InstructionRequest ireq; |
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| 314 | typename iss_t::DataRequest dreq; |
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| 315 | |
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| 316 | m_iss.getRequests( ireq, dreq ); |
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| 317 | std::cout << std::dec << "Proc " << m_srcid_d << std::endl; |
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| 318 | std::cout << ireq << std::endl; |
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| 319 | std::cout << dreq << std::endl; |
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| 320 | std::cout << " " << dcache_fsm_state_str[r_dcache_fsm] |
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| 321 | << " " << icache_fsm_state_str[r_icache_fsm] |
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| 322 | << " " << cmd_fsm_state_str[r_cmd_fsm] |
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| 323 | << " " << rsp_fsm_state_str[r_rsp_fsm] |
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| 324 | << " " << tgt_fsm_state_str[r_tgt_fsm] |
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| 325 | << " " << cleanup_fsm_state_str[r_cleanup_fsm] << std::endl; |
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| 326 | if(mode & 0x1) |
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| 327 | { |
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| 328 | r_wbuf.printTrace(); |
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| 329 | } |
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| 330 | if(mode & 0x2) |
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| 331 | { |
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| 332 | std::cout << " Data cache" << std::endl; |
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| 333 | r_dcache.printTrace(); |
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| 334 | } |
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| 335 | if(mode & 0x4) |
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| 336 | { |
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| 337 | std::cout << " Instruction cache" << std::endl; |
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| 338 | r_icache.printTrace(); |
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| 339 | } |
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[2] | 340 | } |
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[45] | 341 | ///////////////////////////// |
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| 342 | tmpl(void)::printStatistics() |
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[2] | 343 | { |
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| 344 | float run_cycles = (float)(m_cpt_total_cycles - m_cpt_frz_cycles); |
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| 345 | std::cout << "------------------------------------" << std:: dec << std::endl |
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[45] | 346 | << "CPU " << m_srcid_d << " / cycles = " << m_cpt_total_cycles << std::endl |
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[2] | 347 | << "- CPI = " << (float)m_cpt_total_cycles/run_cycles << std::endl |
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| 348 | << "- READ RATE = " << (float)m_cpt_read/run_cycles << std::endl |
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| 349 | << "- WRITE RATE = " << (float)m_cpt_write/run_cycles << std::endl |
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| 350 | << "- CACHED WRITE RATE = " << (float)m_cpt_write_cached/m_cpt_write << std::endl |
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[45] | 351 | << "- UNC RATE = " << (float)m_cpt_data_unc/run_cycles << std::endl |
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| 352 | << "- LL RATE = " << (float)m_cpt_ll/run_cycles << std::endl |
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| 353 | << "- SC RATE = " << (float)m_cpt_sc/run_cycles << std::endl |
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[2] | 354 | << "- IMISS_RATE = " << (float)m_cpt_ins_miss/run_cycles << std::endl |
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| 355 | << "- IMISS COST = " << (float)m_cost_ins_miss_frz/m_cpt_ins_miss << std::endl |
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[45] | 356 | << "- DMISS RATE = " << (float)m_cpt_data_miss/m_cpt_read << std::endl |
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[2] | 357 | << "- DMISS COST = " << (float)m_cost_data_miss_frz/m_cpt_data_miss << std::endl |
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[45] | 358 | << "- UNC COST = " << (float)m_cost_unc_frz/m_cpt_data_unc << std::endl |
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[2] | 359 | << "- WRITE COST = " << (float)m_cost_write_frz/m_cpt_write << std::endl |
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[45] | 360 | << "- WRITE LENGTH = " << (float)m_length_write_transaction/m_cpt_write_transaction << std::endl |
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| 361 | << "- CC_BROADCAST = " << m_cpt_cc_broadcast << std::endl |
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| 362 | << "- CC_UPDATE_DATA = " << m_cpt_cc_update_data << std::endl |
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| 363 | << "- CC_UPDATE_INS = " << m_cpt_cc_update_ins << std::endl |
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| 364 | << "- CC_INVAL_DATA = " << m_cpt_cc_inval_data << std::endl |
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| 365 | << "- CC_INVAL_INS = " << m_cpt_cc_inval_ins << std::endl |
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| 366 | << "- CC_CLEANUP_DATA = " << m_cpt_cc_cleanup_data << std::endl |
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| 367 | << "- CC_CLEANUP_INS = " << m_cpt_cc_cleanup_ins << std::endl; |
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[2] | 368 | } |
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| 369 | |
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| 370 | ////////////////////////// |
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| 371 | tmpl(void)::transition() |
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| 372 | { |
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| 373 | if ( ! p_resetn.read() ) { |
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| 374 | |
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| 375 | m_iss.reset(); |
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| 376 | |
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| 377 | // FSM states |
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| 378 | r_dcache_fsm = DCACHE_IDLE; |
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| 379 | r_icache_fsm = ICACHE_IDLE; |
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| 380 | r_cmd_fsm = CMD_IDLE; |
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| 381 | r_rsp_fsm = RSP_IDLE; |
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| 382 | r_tgt_fsm = TGT_IDLE; |
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[45] | 383 | r_cleanup_fsm = CLEANUP_IDLE; |
---|
[2] | 384 | |
---|
| 385 | // write buffer & caches |
---|
| 386 | r_wbuf.reset(); |
---|
| 387 | r_icache.reset(); |
---|
| 388 | r_dcache.reset(); |
---|
| 389 | |
---|
| 390 | // synchronisation flip-flops from ICACHE & DCACHE FSMs to CMD FSM |
---|
| 391 | r_icache_miss_req = false; |
---|
| 392 | r_icache_unc_req = false; |
---|
| 393 | r_dcache_miss_req = false; |
---|
| 394 | r_dcache_unc_req = false; |
---|
| 395 | |
---|
| 396 | // synchronisation flip-flops from ICACHE & DCACHE FSMs to CLEANUP FSM |
---|
| 397 | r_icache_cleanup_req = false; |
---|
| 398 | r_dcache_cleanup_req = false; |
---|
| 399 | |
---|
| 400 | // synchronisation flip-flops from TGT FSM to ICACHE & DCACHE FSMs |
---|
| 401 | r_tgt_icache_req = false; |
---|
| 402 | r_tgt_dcache_req = false; |
---|
| 403 | r_tgt_icache_rsp = false; |
---|
| 404 | r_tgt_dcache_rsp = false; |
---|
| 405 | |
---|
| 406 | // internal messages in DCACHE et ICACHE FSMs |
---|
| 407 | r_icache_inval_pending = false; |
---|
| 408 | r_dcache_inval_pending = false; |
---|
| 409 | |
---|
| 410 | // synchronisation flip-flops from the RSP FSM to the ICACHE or DCACHE FSMs |
---|
| 411 | r_rsp_data_ok = false; |
---|
| 412 | r_rsp_ins_ok = false; |
---|
| 413 | r_rsp_data_error = false; |
---|
| 414 | r_rsp_ins_error = false; |
---|
| 415 | |
---|
| 416 | // activity counters |
---|
| 417 | m_cpt_dcache_data_read = 0; |
---|
| 418 | m_cpt_dcache_data_write = 0; |
---|
| 419 | m_cpt_dcache_dir_read = 0; |
---|
| 420 | m_cpt_dcache_dir_write = 0; |
---|
[45] | 421 | |
---|
[2] | 422 | m_cpt_icache_data_read = 0; |
---|
| 423 | m_cpt_icache_data_write = 0; |
---|
| 424 | m_cpt_icache_dir_read = 0; |
---|
| 425 | m_cpt_icache_dir_write = 0; |
---|
| 426 | |
---|
[45] | 427 | m_cpt_cc_broadcast = 0; |
---|
| 428 | m_cpt_cc_update_data = 0; |
---|
| 429 | m_cpt_cc_inval_data = 0; |
---|
| 430 | m_cpt_cc_cleanup_data = 0; |
---|
| 431 | m_cpt_cc_update_ins = 0; |
---|
| 432 | m_cpt_cc_inval_ins = 0; |
---|
| 433 | m_cpt_cc_cleanup_ins = 0; |
---|
[2] | 434 | |
---|
| 435 | m_cpt_frz_cycles = 0; |
---|
| 436 | m_cpt_total_cycles = 0; |
---|
| 437 | |
---|
| 438 | m_cpt_read = 0; |
---|
| 439 | m_cpt_write = 0; |
---|
[45] | 440 | m_cpt_write_cached = 0; |
---|
| 441 | m_cpt_data_unc = 0; |
---|
| 442 | m_cpt_ins_unc = 0; |
---|
| 443 | m_cpt_ll = 0; |
---|
| 444 | m_cpt_sc = 0; |
---|
[2] | 445 | m_cpt_data_miss = 0; |
---|
| 446 | m_cpt_ins_miss = 0; |
---|
| 447 | |
---|
| 448 | m_cost_write_frz = 0; |
---|
| 449 | m_cost_data_miss_frz = 0; |
---|
[45] | 450 | m_cost_unc_frz = 0; |
---|
[2] | 451 | m_cost_ins_miss_frz = 0; |
---|
| 452 | |
---|
| 453 | m_cpt_imiss_transaction = 0; |
---|
| 454 | m_cpt_dmiss_transaction = 0; |
---|
[45] | 455 | m_cpt_data_unc_transaction = 0; |
---|
| 456 | m_cpt_ins_unc_transaction = 0; |
---|
[2] | 457 | m_cpt_write_transaction = 0; |
---|
| 458 | |
---|
| 459 | return; |
---|
| 460 | } |
---|
| 461 | |
---|
| 462 | #if SOCLIB_MODULE_DEBUG |
---|
| 463 | if ( m_srcid_d == 0 ) |
---|
| 464 | { |
---|
[45] | 465 | std::cout << std::dec << "CcXcache " << m_srcid_d << " / Time = " << m_cpt_total_cycles << std::endl |
---|
[2] | 466 | << " " << dcache_fsm_state_str[r_dcache_fsm] |
---|
| 467 | << " " << icache_fsm_state_str[r_icache_fsm] |
---|
| 468 | << " " << cmd_fsm_state_str[r_cmd_fsm] |
---|
| 469 | << " " << rsp_fsm_state_str[r_rsp_fsm] |
---|
| 470 | << " " << cleanup_fsm_state_str[r_cleanup_fsm] |
---|
| 471 | << " " << tgt_fsm_state_str[r_tgt_fsm] << std::endl; |
---|
| 472 | } |
---|
| 473 | #endif |
---|
| 474 | |
---|
| 475 | m_cpt_total_cycles++; |
---|
| 476 | |
---|
| 477 | ///////////////////////////////////////////////////////////////////// |
---|
| 478 | // The TGT_FSM controls the following ressources: |
---|
| 479 | // - r_tgt_fsm |
---|
| 480 | // - r_tgt_buf[nwords] |
---|
| 481 | // - r_tgt_val[nwords] |
---|
| 482 | // - r_tgt_update |
---|
| 483 | // - r_tgt_data |
---|
| 484 | // - r_tgt_word |
---|
| 485 | // - r_tgt_addr |
---|
| 486 | // - r_tgt_srcid |
---|
| 487 | // - r_tgt_trdid |
---|
| 488 | // - r_tgt_pktid |
---|
| 489 | // All VCI commands must be CMD_WRITE. |
---|
| 490 | // If the VCI address offset is null, the command is an invalidate |
---|
| 491 | // request. It is an update request otherwise. |
---|
| 492 | // The VCI_TGT FSM stores the external request arguments in the |
---|
| 493 | // IDLE, UPDT_WORD & UPDT_DATA states. It sets the r_tgt_icache_req |
---|
| 494 | // & r_tgt_dcache_req flip-flops to signal the external request to |
---|
| 495 | // the ICACHE & DCACHE FSMs in the REQ states. It waits the completion |
---|
| 496 | // of the update or invalidate request in the RSP states. |
---|
| 497 | // - for an invalidate request the VCI packet length is 1 word. |
---|
| 498 | // The WDATA field contains the line index (i.e. the Z & Y fields). |
---|
| 499 | // - for an update request the VCI packet length is (n+2) words. |
---|
| 500 | // The WDATA field of the first VCI word contains the line index. |
---|
| 501 | // The WDATA field of the second VCI word contains the word index. |
---|
| 502 | // The WDATA field of the n following words contains the values. |
---|
| 503 | // - for both invalidate & update requests, the VCI response |
---|
| 504 | // is one single word. |
---|
| 505 | // In case of errors in the VCI command packet, the simulation |
---|
| 506 | // is stopped with an error message. |
---|
| 507 | ///////////////////////////////////////////////////////////////////// |
---|
| 508 | |
---|
| 509 | switch( r_tgt_fsm ) { |
---|
| 510 | |
---|
| 511 | case TGT_IDLE: |
---|
| 512 | { |
---|
| 513 | if ( p_vci_tgt_c.cmdval.read() ) |
---|
| 514 | { |
---|
| 515 | addr_t address = p_vci_tgt_c.address.read(); |
---|
| 516 | |
---|
| 517 | if ( p_vci_tgt_c.cmd.read() != vci_param::CMD_WRITE) |
---|
| 518 | { |
---|
| 519 | std::cout << "error in VCI_CC_XCACHE_WRAPPER " << name() << std::endl; |
---|
| 520 | std::cout << "the received coherence request from " << p_vci_tgt_c.srcid.read() |
---|
| 521 | << " is not a write" << std::endl; |
---|
| 522 | exit(0); |
---|
| 523 | } |
---|
| 524 | |
---|
| 525 | if ( (address != 0x3) && (! m_segment.contains(address)) ) |
---|
| 526 | { |
---|
| 527 | std::cout << "error in VCI_CC_XCACHE_WRAPPER " << name() << std::endl; |
---|
| 528 | std::cout << "out of segment coherence request" << std::endl; |
---|
| 529 | exit(0); |
---|
| 530 | } |
---|
| 531 | |
---|
| 532 | r_tgt_addr = (((addr_t) ((p_vci_tgt_c.be.read() & 0x3) << 32)) | |
---|
| 533 | ((addr_t) (p_vci_tgt_c.wdata.read()))) * m_dcache_words * 4; |
---|
| 534 | r_tgt_srcid = p_vci_tgt_c.srcid.read(); |
---|
| 535 | r_tgt_trdid = p_vci_tgt_c.trdid.read(); |
---|
| 536 | r_tgt_pktid = p_vci_tgt_c.pktid.read(); |
---|
| 537 | r_tgt_plen = p_vci_tgt_c.plen.read(); |
---|
| 538 | |
---|
| 539 | if ( address == 0x3 ) // broadcast invalidate |
---|
| 540 | { |
---|
| 541 | if ( ! p_vci_tgt_c.eop.read() ) |
---|
| 542 | { |
---|
| 543 | std::cout << "error in VCI_CC_XCACHE_WRAPPER " << name() << std::endl; |
---|
| 544 | std::cout << "a broascast request must be one word" << std::endl; |
---|
| 545 | exit(0); |
---|
| 546 | } |
---|
| 547 | r_tgt_update = false; |
---|
| 548 | r_tgt_brdcast= true; |
---|
| 549 | r_tgt_fsm = TGT_REQ_BROADCAST; |
---|
[45] | 550 | m_cpt_cc_broadcast++; |
---|
[2] | 551 | } |
---|
| 552 | else // multicast-update or multicast-invalidate |
---|
| 553 | { |
---|
| 554 | uint32_t cell = address - m_segment.baseAddress(); |
---|
| 555 | if (cell == 0) // invalidate data |
---|
| 556 | { |
---|
| 557 | if ( ! p_vci_tgt_c.eop.read() ) |
---|
| 558 | { |
---|
| 559 | std::cout << "error in VCI_CC_XCACHE_WRAPPER " << name() << std::endl; |
---|
| 560 | std::cout << "an invalidate requestn must be one word" << std::endl; |
---|
| 561 | exit(0); |
---|
| 562 | } |
---|
| 563 | r_tgt_brdcast = false; |
---|
| 564 | r_tgt_update = false; |
---|
| 565 | r_tgt_data = true; |
---|
| 566 | r_tgt_fsm = TGT_REQ_DCACHE; |
---|
[45] | 567 | m_cpt_cc_inval_data++; |
---|
[2] | 568 | } |
---|
| 569 | else if (cell == 4) // update data |
---|
| 570 | { |
---|
| 571 | if ( p_vci_tgt_c.eop.read() ) |
---|
| 572 | { |
---|
| 573 | std::cout << "error in VCI_CC_VCACHE_WRAPPER " << name() << std::endl; |
---|
| 574 | std::cout << "an update request must be N+2 words" << std::endl; |
---|
| 575 | exit(0); |
---|
| 576 | } |
---|
| 577 | r_tgt_brdcast = false; |
---|
| 578 | r_tgt_update = true; |
---|
| 579 | r_tgt_data = true; |
---|
| 580 | r_tgt_fsm = TGT_UPDT_WORD; |
---|
[45] | 581 | m_cpt_cc_update_data++; |
---|
[2] | 582 | } |
---|
| 583 | else if (cell == 8) // invalidate instruction |
---|
| 584 | { |
---|
| 585 | if ( ! p_vci_tgt_c.eop.read() ) |
---|
| 586 | { |
---|
| 587 | std::cout << "error in VCI_CC_VCACHE_WRAPPER " << name() << std::endl; |
---|
| 588 | std::cout << "an invalidate request must be one word" << std::endl; |
---|
| 589 | exit(0); |
---|
| 590 | } |
---|
| 591 | r_tgt_brdcast = false; |
---|
| 592 | r_tgt_data = false; |
---|
| 593 | r_tgt_update = false; |
---|
| 594 | r_tgt_fsm = TGT_REQ_ICACHE; |
---|
[45] | 595 | m_cpt_cc_inval_ins++; |
---|
[2] | 596 | } |
---|
| 597 | else if (cell == 12) // update ins |
---|
| 598 | { |
---|
| 599 | if ( p_vci_tgt_c.eop.read() ) |
---|
| 600 | { |
---|
| 601 | std::cout << "error in VCI_CC_VCACHE_WRAPPER " << name() << std::endl; |
---|
| 602 | std::cout << "an update request must be N+2 words" << std::endl; |
---|
| 603 | exit(0); |
---|
| 604 | } |
---|
| 605 | r_tgt_brdcast = false; |
---|
| 606 | r_tgt_update = true; |
---|
| 607 | r_tgt_data = false; |
---|
| 608 | r_tgt_fsm = TGT_UPDT_WORD; |
---|
[45] | 609 | m_cpt_cc_update_ins++; |
---|
[2] | 610 | } |
---|
| 611 | |
---|
| 612 | } // end if address |
---|
| 613 | } // end if cmdval |
---|
| 614 | break; |
---|
| 615 | } |
---|
| 616 | case TGT_UPDT_WORD: |
---|
| 617 | { |
---|
| 618 | if (p_vci_tgt_c.cmdval.read()) |
---|
| 619 | { |
---|
| 620 | if ( p_vci_tgt_c.eop.read() ) |
---|
| 621 | { |
---|
| 622 | std::cout << "error in VCI_CC_XCACHE_WRAPPER " << name() << std::endl; |
---|
| 623 | std::cout << "an update command length must be N+2 words" << std::endl; |
---|
| 624 | exit(0); |
---|
| 625 | } |
---|
| 626 | for ( size_t i=0 ; i<m_dcache_words ; i++ ) r_tgt_val[i] = false; |
---|
| 627 | r_tgt_word = p_vci_tgt_c.wdata.read(); // the first modified word index |
---|
| 628 | r_tgt_fsm = TGT_UPDT_DATA; |
---|
| 629 | } |
---|
| 630 | break; |
---|
| 631 | } |
---|
| 632 | case TGT_UPDT_DATA: |
---|
| 633 | { |
---|
| 634 | if (p_vci_tgt_c.cmdval.read()) |
---|
| 635 | { |
---|
| 636 | size_t word = r_tgt_word.read(); |
---|
| 637 | if ( word >= m_dcache_words ) |
---|
| 638 | { |
---|
| 639 | std::cout << "error in VCI_CC_XCACHE_WRAPPER " << name() << std::endl; |
---|
| 640 | std::cout << "the word index in an update request is wrong" << std::endl; |
---|
| 641 | exit(0); |
---|
| 642 | } |
---|
| 643 | r_tgt_buf[word] = p_vci_tgt_c.wdata.read(); |
---|
| 644 | if(p_vci_tgt_c.be.read()) r_tgt_val[word] = true; |
---|
| 645 | r_tgt_word = word + 1; |
---|
| 646 | if (p_vci_tgt_c.eop.read()) { |
---|
| 647 | if (r_tgt_data.read()) r_tgt_fsm = TGT_REQ_DCACHE; |
---|
| 648 | else r_tgt_fsm = TGT_REQ_ICACHE; |
---|
| 649 | } |
---|
| 650 | } |
---|
| 651 | break; |
---|
| 652 | } |
---|
| 653 | case TGT_REQ_ICACHE: |
---|
| 654 | { |
---|
| 655 | if ( !r_tgt_icache_req.read() ) |
---|
| 656 | { |
---|
| 657 | r_tgt_fsm = TGT_RSP_ICACHE; |
---|
| 658 | r_tgt_icache_req = true; |
---|
| 659 | } |
---|
| 660 | break; |
---|
| 661 | } |
---|
| 662 | case TGT_REQ_DCACHE: |
---|
| 663 | { |
---|
| 664 | if ( !r_tgt_dcache_req.read() ) |
---|
| 665 | { |
---|
| 666 | r_tgt_fsm = TGT_RSP_DCACHE; |
---|
| 667 | r_tgt_dcache_req = true; |
---|
| 668 | } |
---|
| 669 | break; |
---|
| 670 | } |
---|
| 671 | case TGT_REQ_BROADCAST: |
---|
| 672 | { |
---|
| 673 | if ( !r_tgt_icache_req.read() && !r_tgt_dcache_req.read() ) |
---|
| 674 | { |
---|
| 675 | r_tgt_fsm = TGT_RSP_BROADCAST; |
---|
| 676 | r_tgt_icache_req = true; |
---|
| 677 | r_tgt_dcache_req = true; |
---|
| 678 | } |
---|
| 679 | break; |
---|
| 680 | } |
---|
| 681 | case TGT_RSP_BROADCAST: |
---|
| 682 | { |
---|
| 683 | if ( !r_tgt_icache_req.read() && !r_tgt_dcache_req.read() ) |
---|
| 684 | { |
---|
| 685 | // one response |
---|
| 686 | if ( !r_tgt_icache_rsp || !r_tgt_dcache_rsp ) |
---|
| 687 | { |
---|
| 688 | if ( p_vci_tgt_c.rspack.read() ) |
---|
| 689 | { |
---|
| 690 | r_tgt_fsm = TGT_IDLE; |
---|
| 691 | r_tgt_icache_rsp = false; |
---|
| 692 | r_tgt_dcache_rsp = false; |
---|
| 693 | } |
---|
| 694 | } |
---|
| 695 | // two responses |
---|
| 696 | if ( r_tgt_icache_rsp && r_tgt_dcache_rsp ) |
---|
| 697 | { |
---|
| 698 | if ( p_vci_tgt_c.rspack.read() ) |
---|
| 699 | { |
---|
| 700 | r_tgt_icache_rsp = false; // reset one to prepare the second response |
---|
| 701 | } |
---|
| 702 | } |
---|
| 703 | // no need for a response |
---|
| 704 | if ( !r_tgt_icache_rsp && !r_tgt_dcache_rsp ) |
---|
| 705 | { |
---|
| 706 | r_tgt_fsm = TGT_IDLE; |
---|
| 707 | } |
---|
| 708 | } |
---|
| 709 | break; |
---|
| 710 | } |
---|
| 711 | case TGT_RSP_ICACHE: |
---|
| 712 | { |
---|
| 713 | if ( (p_vci_tgt_c.rspack.read() || !r_tgt_icache_rsp.read()) && !r_tgt_icache_req.read() ) |
---|
| 714 | { |
---|
| 715 | r_tgt_fsm = TGT_IDLE; |
---|
| 716 | r_tgt_icache_rsp = false; |
---|
| 717 | } |
---|
| 718 | break; |
---|
| 719 | } |
---|
| 720 | case TGT_RSP_DCACHE: |
---|
| 721 | { |
---|
| 722 | if ( (p_vci_tgt_c.rspack.read() || !r_tgt_dcache_rsp.read()) && !r_tgt_dcache_req.read() ) |
---|
| 723 | { |
---|
| 724 | r_tgt_fsm = TGT_IDLE; |
---|
| 725 | r_tgt_dcache_rsp = false; |
---|
| 726 | } |
---|
| 727 | break; |
---|
| 728 | } |
---|
| 729 | } // end switch TGT_FSM |
---|
| 730 | |
---|
[45] | 731 | typename iss_t::InstructionRequest ireq; |
---|
| 732 | typename iss_t::InstructionResponse irsp; |
---|
| 733 | |
---|
| 734 | typename iss_t::DataRequest dreq; |
---|
| 735 | typename iss_t::DataResponse drsp; |
---|
| 736 | |
---|
| 737 | ireq.valid = false; |
---|
| 738 | dreq.valid = false; |
---|
| 739 | irsp.valid = false; |
---|
| 740 | irsp.error = false; |
---|
| 741 | drsp.valid = false; |
---|
| 742 | drsp.error = false; |
---|
| 743 | |
---|
| 744 | m_iss.getRequests( ireq, dreq ); |
---|
| 745 | |
---|
[2] | 746 | ////////////////////////////////////////////////////////////////////////////// |
---|
| 747 | // The ICACHE FSM controls the following ressources: |
---|
| 748 | // - r_icache_fsm |
---|
| 749 | // - r_icache_fsm_save |
---|
[45] | 750 | // - r_icache (read & write) |
---|
[2] | 751 | // - r_icache_addr_save |
---|
[45] | 752 | // - r_icache_miss_req (set) |
---|
| 753 | // - r_icache_unc_req (set) |
---|
| 754 | // - r_rsp_ins_ok (reset) |
---|
| 755 | // - r_rsp_ins_error (reset) |
---|
| 756 | // - r_tgt_icache_req (reset) |
---|
[2] | 757 | // - r_tgt_icache_rsp |
---|
[45] | 758 | // - r_icache_cleanup_req (set) |
---|
| 759 | // - r_icache_cleanup_line |
---|
| 760 | // - ireq & irsp structures (communication with the processor) |
---|
[2] | 761 | // |
---|
[45] | 762 | // 1/ External coherence requests (update or invalidate) |
---|
[2] | 763 | // There is an external request when the r_tgt_icache_req flip-flop is set, |
---|
| 764 | // These requests are taken into account in the IDLE and WAIT states. |
---|
| 765 | // In case of external request the ICACHE FSM goes to the CC_CHECK |
---|
| 766 | // state to test the external hit, and returns in the |
---|
| 767 | // pre-empted state after this external request is completed. |
---|
| 768 | // |
---|
| 769 | // 2/ Processor requests are taken into account only in the IDLE state. |
---|
[45] | 770 | // The cache access takes into account the cacheability_table. |
---|
| 771 | // In case of MISS, or in case of uncachable instruction, the FSM |
---|
[2] | 772 | // writes the missing address line in the r_icache_addr_save register |
---|
| 773 | // and sets the r_icache_miss_req or the r_icache_unc_req flip-flops. |
---|
| 774 | // These request flip-flops are reset by the CMD FSM. |
---|
| 775 | // The r_rsp_ins_ok flip-flop is set by the RSP FSM when the |
---|
| 776 | // transaction is completed. In case of bus error, the RSP FSM sets |
---|
| 777 | // the r_rsp_ins_error flip-flop. They must be reset by the ICACHE FSM. |
---|
| 778 | // - CACHED READ MISS => to the MISS_WAIT state, waiting the r_rsp_ins_ok signal. |
---|
| 779 | // It can be delayed in the MISS_DELAY state in case of matching pending |
---|
| 780 | // cleanup request. Then it goes to the MISS_UPDT state, then to the CLEANUP_REQ |
---|
| 781 | // state (if necessary), and finally to the IDLE state. |
---|
| 782 | // - UNCACHED READ => to the UNC_WAIT state (waiting the r_rsp_ins_ok signal), |
---|
| 783 | // and back to the IDLE state. |
---|
| 784 | //////////////////////////////////////////////////////////////////////////////////// |
---|
| 785 | |
---|
| 786 | switch(r_icache_fsm) { |
---|
| 787 | |
---|
[45] | 788 | case ICACHE_IDLE: |
---|
| 789 | { |
---|
| 790 | if ( r_tgt_icache_req ) // external request |
---|
[2] | 791 | { |
---|
[45] | 792 | if ( ireq.valid ) m_cost_ins_miss_frz++; |
---|
| 793 | r_icache_fsm = ICACHE_CC_CHECK; |
---|
| 794 | r_icache_fsm_save = r_icache_fsm; |
---|
| 795 | break; |
---|
| 796 | } |
---|
| 797 | if ( ireq.valid ) |
---|
| 798 | { |
---|
| 799 | data_t icache_ins; |
---|
| 800 | bool icache_cachable = m_cacheability_table[(addr_t)ireq.addr]; |
---|
| 801 | m_cpt_icache_dir_read += m_icache_ways; |
---|
| 802 | m_cpt_icache_data_read += m_icache_ways; |
---|
| 803 | if ( icache_cachable ) |
---|
[2] | 804 | { |
---|
[45] | 805 | if ( r_icache.read((addr_t)ireq.addr, &icache_ins) ) // hit |
---|
[2] | 806 | { |
---|
[45] | 807 | r_icache_fsm = ICACHE_IDLE; |
---|
| 808 | irsp.valid = true; |
---|
| 809 | irsp.instruction = icache_ins; |
---|
[2] | 810 | } |
---|
[45] | 811 | else // miss |
---|
[2] | 812 | { |
---|
| 813 | m_cpt_ins_miss++; |
---|
| 814 | m_cost_ins_miss_frz++; |
---|
[45] | 815 | // if the missing line corresponds to a pending cleanup |
---|
| 816 | // the miss request to the CMD FSM must be delayed |
---|
| 817 | if ( r_icache_cleanup_req && |
---|
| 818 | ((addr_t)r_icache_cleanup_line == (addr_t)(ireq.addr/(m_icache_words*4))) ) |
---|
[2] | 819 | { |
---|
[45] | 820 | break; |
---|
| 821 | } |
---|
| 822 | else |
---|
[2] | 823 | { |
---|
[45] | 824 | r_icache_fsm = ICACHE_MISS_SELECT; |
---|
| 825 | r_icache_addr_save = ireq.addr; |
---|
| 826 | r_icache_miss_req = true; |
---|
[2] | 827 | r_rsp_ins_ok = false; |
---|
| 828 | } |
---|
[45] | 829 | } |
---|
[2] | 830 | } |
---|
[45] | 831 | else // uncachable instruction |
---|
[2] | 832 | { |
---|
[45] | 833 | m_cpt_ins_unc++; |
---|
| 834 | m_cost_ins_miss_frz++; |
---|
| 835 | r_icache_addr_save = ireq.addr; |
---|
| 836 | r_icache_fsm = ICACHE_UNC_WAIT; |
---|
| 837 | r_icache_unc_req = true; |
---|
| 838 | r_rsp_ins_ok = false; |
---|
[2] | 839 | } |
---|
| 840 | } |
---|
[45] | 841 | break; |
---|
| 842 | } |
---|
| 843 | case ICACHE_MISS_SELECT: // select a victim |
---|
| 844 | { |
---|
| 845 | m_cost_ins_miss_frz++; |
---|
| 846 | size_t way; |
---|
| 847 | addr_t index; |
---|
| 848 | addr_t ad = r_icache_addr_save; |
---|
| 849 | if ( r_icache.select_before_update( ad, &way, &index) ) |
---|
[2] | 850 | { |
---|
[45] | 851 | r_icache_fsm = ICACHE_MISS_CLEANUP; |
---|
| 852 | r_icache_cleanup_save = index; |
---|
| 853 | r_icache_way_save = way; |
---|
[2] | 854 | } |
---|
[45] | 855 | else |
---|
[2] | 856 | { |
---|
[45] | 857 | r_icache_way_save = way; |
---|
| 858 | r_icache_fsm = ICACHE_MISS_WAIT; |
---|
[2] | 859 | } |
---|
[45] | 860 | break; |
---|
| 861 | } |
---|
| 862 | case ICACHE_MISS_CLEANUP: // try to post a cleanup request to the CLEANUP FSM |
---|
| 863 | { |
---|
| 864 | m_cost_ins_miss_frz++; |
---|
| 865 | if ( r_tgt_icache_req ) // coherence request |
---|
[2] | 866 | { |
---|
[45] | 867 | r_icache_fsm = ICACHE_CC_CHECK; |
---|
| 868 | r_icache_fsm_save = r_icache_fsm; |
---|
[2] | 869 | break; |
---|
[45] | 870 | } |
---|
| 871 | if ( !r_icache_cleanup_req ) // no pending cleanup |
---|
[2] | 872 | { |
---|
[45] | 873 | r_icache_cleanup_req = true; |
---|
| 874 | r_icache_cleanup_line = r_icache_cleanup_save; |
---|
| 875 | r_icache_fsm = ICACHE_MISS_WAIT; |
---|
[2] | 876 | } |
---|
[45] | 877 | break; |
---|
| 878 | } |
---|
| 879 | case ICACHE_MISS_WAIT: // waiting the response from the RSP FSM |
---|
| 880 | { |
---|
| 881 | m_cost_ins_miss_frz++; |
---|
| 882 | if ( r_tgt_icache_req ) // coherence request |
---|
[2] | 883 | { |
---|
[45] | 884 | r_icache_fsm = ICACHE_CC_CHECK; |
---|
| 885 | r_icache_fsm_save = r_icache_fsm; |
---|
[2] | 886 | break; |
---|
| 887 | } |
---|
[45] | 888 | if ( r_rsp_ins_ok ) // there is a response |
---|
[2] | 889 | { |
---|
[45] | 890 | if ( r_rsp_ins_error ) r_icache_fsm = ICACHE_ERROR; |
---|
| 891 | else if ( !r_icache_inval_pending ) r_icache_fsm = ICACHE_MISS_UPDT; |
---|
| 892 | else |
---|
[2] | 893 | { |
---|
[45] | 894 | if ( r_icache_cleanup_req ) |
---|
[2] | 895 | { |
---|
[45] | 896 | break; |
---|
| 897 | } |
---|
| 898 | else |
---|
[2] | 899 | { |
---|
[45] | 900 | // the cache is not updated in case of pending inval |
---|
| 901 | r_icache_cleanup_req = true; |
---|
| 902 | r_icache_cleanup_line = r_icache_addr_save.read() >> (uint32_log2(m_icache_words) + 2); |
---|
| 903 | r_icache_fsm = ICACHE_IDLE; |
---|
| 904 | r_icache_inval_pending = false; |
---|
[2] | 905 | } |
---|
| 906 | } |
---|
[45] | 907 | } |
---|
| 908 | break; |
---|
| 909 | } |
---|
| 910 | case ICACHE_MISS_UPDT: // update the cache |
---|
| 911 | { |
---|
| 912 | m_cost_ins_miss_frz++; |
---|
| 913 | m_cpt_icache_dir_write++; |
---|
| 914 | m_cpt_icache_data_write++; |
---|
| 915 | addr_t ad = (addr_t) r_icache_addr_save; |
---|
| 916 | data_t* buf = (data_t*) r_icache_miss_buf; |
---|
| 917 | size_t way = (size_t) r_icache_way_save; |
---|
| 918 | r_icache.update_after_select( buf, way, ad ); |
---|
| 919 | r_icache_fsm = ICACHE_IDLE; |
---|
| 920 | break; |
---|
| 921 | } |
---|
| 922 | case ICACHE_UNC_WAIT: |
---|
| 923 | { |
---|
| 924 | m_cost_ins_miss_frz++; |
---|
| 925 | if ( r_tgt_icache_req ) // external request |
---|
| 926 | { |
---|
| 927 | r_icache_fsm = ICACHE_CC_CHECK; |
---|
| 928 | r_icache_fsm_save = r_icache_fsm; |
---|
[2] | 929 | break; |
---|
[45] | 930 | } |
---|
| 931 | if ( r_rsp_ins_ok ) |
---|
| 932 | { |
---|
| 933 | if ( r_rsp_ins_error ) r_icache_fsm = ICACHE_ERROR; |
---|
| 934 | else r_icache_fsm = ICACHE_UNC_GO; |
---|
[2] | 935 | } |
---|
[45] | 936 | break; |
---|
| 937 | } |
---|
| 938 | case ICACHE_UNC_GO: |
---|
| 939 | { |
---|
| 940 | r_icache_fsm = ICACHE_IDLE; |
---|
| 941 | if( ireq.addr == r_icache_addr_save ) |
---|
[2] | 942 | { |
---|
[45] | 943 | irsp.valid = true; |
---|
| 944 | irsp.instruction = r_icache_miss_buf[0]; |
---|
| 945 | } |
---|
| 946 | } |
---|
| 947 | case ICACHE_ERROR: |
---|
| 948 | { |
---|
| 949 | r_icache_fsm = ICACHE_IDLE; |
---|
| 950 | r_rsp_ins_error = false; |
---|
| 951 | irsp.error = true; |
---|
| 952 | irsp.valid = true; |
---|
| 953 | break; |
---|
| 954 | } |
---|
| 955 | case ICACHE_CC_CHECK: // read directory in case of external request |
---|
| 956 | { |
---|
| 957 | m_cpt_icache_dir_read += m_icache_ways; |
---|
| 958 | m_cpt_icache_data_read += m_icache_ways; |
---|
| 959 | if ( ( (r_icache_fsm_save == ICACHE_MISS_WAIT) || (r_icache_fsm_save == ICACHE_MISS_CLEANUP) ) && |
---|
| 960 | ((r_icache_addr_save & ~((m_icache_words<<2)-1))==(r_tgt_addr & ~((m_icache_words<<2)-1)))) |
---|
| 961 | // the external request matches a miss |
---|
| 962 | { |
---|
| 963 | r_icache_inval_pending = true; |
---|
| 964 | r_tgt_icache_req = false; |
---|
| 965 | r_tgt_icache_rsp = r_tgt_update; // always a response in case of update |
---|
| 966 | r_icache_fsm = r_icache_fsm_save; |
---|
| 967 | } |
---|
| 968 | else // the external request is not matching a pending miss |
---|
| 969 | { |
---|
| 970 | data_t data; |
---|
| 971 | bool icache_hit = r_icache.read(r_tgt_addr, &data); |
---|
| 972 | if ( icache_hit && r_tgt_update ) // hit update |
---|
[2] | 973 | { |
---|
[45] | 974 | r_icache_fsm = ICACHE_CC_UPDT; |
---|
| 975 | } |
---|
| 976 | else if ( icache_hit && !r_tgt_update ) // hit inval |
---|
| 977 | { |
---|
| 978 | r_icache_fsm = ICACHE_CC_INVAL; |
---|
| 979 | } |
---|
| 980 | else // miss |
---|
| 981 | { |
---|
| 982 | r_tgt_icache_req = false; |
---|
| 983 | r_tgt_icache_rsp = r_tgt_update; // alaways a response in case of update |
---|
| 984 | r_icache_fsm = r_icache_fsm_save; |
---|
[2] | 985 | } |
---|
| 986 | } |
---|
[45] | 987 | break; |
---|
| 988 | } |
---|
| 989 | case ICACHE_CC_UPDT: // update the cache line |
---|
| 990 | { |
---|
| 991 | m_cpt_icache_dir_write++; |
---|
| 992 | m_cpt_icache_data_write++; |
---|
| 993 | for(size_t i=0; i<m_icache_words; i++) |
---|
[2] | 994 | { |
---|
[45] | 995 | if(r_tgt_val[i]) r_icache.write( (r_tgt_addr + i*4), r_tgt_buf[i] ); |
---|
[2] | 996 | } |
---|
[45] | 997 | r_tgt_icache_rsp = true; |
---|
| 998 | r_tgt_icache_req = false; |
---|
| 999 | r_icache_fsm = r_icache_fsm_save; |
---|
| 1000 | break; |
---|
| 1001 | } |
---|
| 1002 | case ICACHE_CC_INVAL: // invalidate a cache line |
---|
| 1003 | { |
---|
| 1004 | r_icache.inval(r_tgt_addr); |
---|
| 1005 | r_tgt_icache_rsp = true; |
---|
| 1006 | r_tgt_icache_req = false; |
---|
| 1007 | r_icache_fsm = r_icache_fsm_save; |
---|
| 1008 | break; |
---|
| 1009 | } |
---|
[2] | 1010 | } // end switch r_icache_fsm |
---|
| 1011 | |
---|
| 1012 | //////////////////////////////////////////////////////////////////////:///////////// |
---|
| 1013 | // The DCACHE FSM controls the following ressources: |
---|
| 1014 | // - r_dcache_fsm |
---|
| 1015 | // - r_dcache_fsm_save |
---|
[45] | 1016 | // - r_dcache (read and write) |
---|
[2] | 1017 | // - r_dcache_addr_save |
---|
| 1018 | // - r_dcache_wdata_save |
---|
| 1019 | // - r_dcache_rdata_save |
---|
| 1020 | // - r_dcache_type_save |
---|
| 1021 | // - r_dcache_be_save |
---|
[45] | 1022 | // - r_dcache_miss_req (set) |
---|
| 1023 | // - r_dcache_unc_req (set) |
---|
| 1024 | // - r_rsp_data_ok (reset) |
---|
| 1025 | // - r_rsp_data_error (reset) |
---|
| 1026 | // - r_dcache_cleanup_req (set) |
---|
[2] | 1027 | // - r_dcache_cleanup_ine |
---|
[45] | 1028 | // - r_tgt_dcache_req (reset) |
---|
[2] | 1029 | // - r_tgt_dcache_rsp |
---|
[45] | 1030 | // - r_wbuf (write) |
---|
| 1031 | // - dreq & drsp structures (communication with the processor) |
---|
[2] | 1032 | // |
---|
| 1033 | // 1/ external request (invalidate or update) |
---|
| 1034 | // There is an external request when the r_tgt_dcache_req flip-flop is set. |
---|
| 1035 | // External requests are taken into account in the states IDLE, WRITE_REQ, |
---|
| 1036 | // UNC_WAIT, MISS_WAIT, and have the highest priority : |
---|
| 1037 | // The actions associated to the pre-empted state are not executed, the DCACHE FSM |
---|
| 1038 | // goes to the CC_CHECK state to execute the requested action, and returns to the |
---|
| 1039 | // pre-empted state. |
---|
| 1040 | // |
---|
| 1041 | // 2/ processor request |
---|
| 1042 | // In order to support VCI write burst, the processor requests are taken into account |
---|
| 1043 | // in the WRITE_REQ state as well as in the IDLE state. |
---|
[45] | 1044 | // - In IDLE state, the request is satisfied if it is a cachable read hit, |
---|
| 1045 | // an XTN request, or a cachable write. |
---|
| 1046 | // - In WRITE_REQ state, the request is satisfied if it is a cachable read hit, |
---|
| 1047 | // an XTN request, or a write when the write buffer is not full. |
---|
| 1048 | // - Both the uncachable read and the uncachable write requests block the processor |
---|
| 1049 | // until the corresponding VCI transaction is completed. |
---|
[2] | 1050 | // |
---|
| 1051 | // The cache access takes into account the cacheability_table. |
---|
| 1052 | // In case of processor request, there is six conditions to exit the IDLE state: |
---|
[45] | 1053 | // - CACHED READ MISS => to the MISS_WAIT state (waiting r_rsp_data_ok), |
---|
| 1054 | // then to the MISS_UPDT state, and finally to the IDLE state. |
---|
| 1055 | // - UNCACHED READ or WRITE => to the UNC_WAIT state (waiting r_rsp_data_ok), |
---|
| 1056 | // then to the UNC_GO state, and finally to the IDLE state. |
---|
| 1057 | // - XTN_INVAL => to the INVAL state for one cycle, then to IDLE state. |
---|
| 1058 | // - XTN_SYNC => to the SYNC state until write buffer empty, then to IDLE state. |
---|
| 1059 | // - WRITE MISS => directly to the WRITE_REQ state to access the write buffer. |
---|
[2] | 1060 | // - WRITE HIT => to the WRITE_UPDT state, then to the WRITE_REQ state. |
---|
| 1061 | // |
---|
[45] | 1062 | // All LL or SC requests are handled as uncachable. |
---|
| 1063 | // |
---|
[2] | 1064 | // Error handling : Read Bus Errors are synchronous events, but |
---|
| 1065 | // Write Bus Errors are asynchronous events (processor is not frozen). |
---|
| 1066 | // - If a Read Bus Error is detected, the VCI_RSP FSM sets the |
---|
| 1067 | // r_rsp_data_error flip-flop, and the synchronous error is signaled |
---|
| 1068 | // by the DCACHE FSM. |
---|
| 1069 | // - If a Write Bus Error is detected, the VCI_RSP FSM signals |
---|
| 1070 | // the asynchronous error using the setWriteBerr() method. |
---|
| 1071 | /////////////////////////////////////////////////////////////////////////////////// |
---|
| 1072 | |
---|
| 1073 | switch ( r_dcache_fsm ) { |
---|
| 1074 | |
---|
| 1075 | case DCACHE_WRITE_REQ: |
---|
| 1076 | { |
---|
| 1077 | if ( r_tgt_dcache_req ) // coherence request |
---|
| 1078 | { |
---|
| 1079 | r_dcache_fsm = DCACHE_CC_CHECK; |
---|
| 1080 | r_dcache_fsm_save = r_dcache_fsm; |
---|
| 1081 | break; |
---|
| 1082 | } |
---|
[45] | 1083 | if( !r_wbuf.write(r_dcache_addr_save, r_dcache_be_save, r_dcache_wdata_save) ) |
---|
[2] | 1084 | { |
---|
| 1085 | // stay in DCACHE_WRITEREQ state if the write request is not accepted |
---|
| 1086 | m_cost_write_frz++; |
---|
| 1087 | break; |
---|
| 1088 | } |
---|
| 1089 | // If the write request is accepted by the write buffer |
---|
| 1090 | // the next state and the response to processor request are evaluated |
---|
| 1091 | // as in the DCACHE_IDLE state below ... |
---|
| 1092 | } |
---|
| 1093 | case DCACHE_IDLE: |
---|
| 1094 | { |
---|
| 1095 | if ( r_tgt_dcache_req ) // coherence request |
---|
| 1096 | { |
---|
| 1097 | r_dcache_fsm = DCACHE_CC_CHECK; |
---|
| 1098 | r_dcache_fsm_save = r_dcache_fsm; |
---|
| 1099 | break; |
---|
| 1100 | } |
---|
| 1101 | if ( dreq.valid ) |
---|
| 1102 | { |
---|
[45] | 1103 | bool dcache_hit; |
---|
| 1104 | data_t dcache_rdata; |
---|
| 1105 | bool dcache_cachable; |
---|
| 1106 | |
---|
| 1107 | // dcache_cachable, dcache_hit & dcache_rdata evaluation |
---|
[2] | 1108 | m_cpt_dcache_data_read += m_dcache_ways; |
---|
| 1109 | m_cpt_dcache_dir_read += m_dcache_ways; |
---|
[45] | 1110 | dcache_cachable = m_cacheability_table[dreq.addr]; |
---|
| 1111 | dcache_hit = r_dcache.read(dreq.addr, &dcache_rdata); |
---|
[2] | 1112 | |
---|
[45] | 1113 | // Save data request |
---|
| 1114 | r_dcache_addr_save = dreq.addr; |
---|
| 1115 | r_dcache_type_save = dreq.type; |
---|
| 1116 | r_dcache_wdata_save = dreq.wdata; |
---|
| 1117 | r_dcache_be_save = dreq.be; |
---|
| 1118 | r_dcache_rdata_save = dcache_rdata; |
---|
[2] | 1119 | |
---|
[45] | 1120 | // reset r_rsp_data_ok |
---|
| 1121 | r_rsp_data_ok = false; |
---|
| 1122 | |
---|
| 1123 | // next FSM state, request to VCI, and processor response |
---|
| 1124 | if(dreq.type == iss_t::DATA_READ) |
---|
[2] | 1125 | { |
---|
[45] | 1126 | if(!dcache_cachable) // uncachable read |
---|
| 1127 | { |
---|
| 1128 | m_cpt_data_unc++; |
---|
| 1129 | m_cost_unc_frz++; |
---|
| 1130 | r_dcache_unc_req = true; |
---|
| 1131 | r_dcache_fsm = DCACHE_UNC_WAIT; |
---|
| 1132 | } |
---|
| 1133 | else |
---|
| 1134 | { |
---|
[2] | 1135 | m_cpt_read++; |
---|
[45] | 1136 | if(dcache_hit) // cachable read hit |
---|
[2] | 1137 | { |
---|
[45] | 1138 | drsp.valid = true; |
---|
| 1139 | drsp.rdata = dcache_rdata; |
---|
| 1140 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 1141 | } |
---|
| 1142 | else // cachable read miss |
---|
[2] | 1143 | { |
---|
[45] | 1144 | m_cost_data_miss_frz++; |
---|
| 1145 | // if the missing line corresponds to a pending cleanup |
---|
| 1146 | // the miss request to the CMD FSM must be delayed |
---|
| 1147 | if ( r_dcache_cleanup_req && |
---|
| 1148 | ((addr_t)r_dcache_cleanup_line == (addr_t)(dreq.addr/(m_dcache_words*4))) ) |
---|
[2] | 1149 | { |
---|
[45] | 1150 | break; |
---|
| 1151 | } |
---|
| 1152 | else |
---|
| 1153 | { |
---|
[2] | 1154 | m_cpt_data_miss++; |
---|
[45] | 1155 | r_dcache_miss_req = true; |
---|
| 1156 | r_dcache_fsm = DCACHE_MISS_SELECT; |
---|
[2] | 1157 | } |
---|
| 1158 | } |
---|
[45] | 1159 | } |
---|
| 1160 | } |
---|
| 1161 | else if(dreq.type == iss_t::DATA_WRITE) |
---|
| 1162 | { |
---|
| 1163 | if(!dcache_cachable) // uncachable write |
---|
| 1164 | { |
---|
| 1165 | m_cpt_data_unc++; |
---|
| 1166 | m_cost_unc_frz++; |
---|
| 1167 | r_dcache_unc_req = true; |
---|
| 1168 | r_dcache_fsm = DCACHE_UNC_WAIT; |
---|
| 1169 | } |
---|
| 1170 | else |
---|
| 1171 | { |
---|
| 1172 | m_cpt_write++; |
---|
| 1173 | if(!dcache_hit) // cachable write miss |
---|
[2] | 1174 | { |
---|
[45] | 1175 | drsp.rdata = 0; |
---|
| 1176 | drsp.valid = true; |
---|
| 1177 | r_dcache_fsm = DCACHE_WRITE_REQ; |
---|
[2] | 1178 | } |
---|
[45] | 1179 | else // cachable write hit |
---|
[2] | 1180 | { |
---|
| 1181 | m_cpt_write_cached++; |
---|
[45] | 1182 | drsp.rdata = 0; |
---|
| 1183 | drsp.valid = true; |
---|
| 1184 | r_dcache_fsm = DCACHE_WRITE_UPDT; |
---|
[2] | 1185 | } |
---|
[45] | 1186 | } |
---|
| 1187 | } |
---|
| 1188 | else if(dreq.type == iss_t::DATA_LL) // linked read |
---|
| 1189 | // all LL requests are handled as uncachable |
---|
| 1190 | { |
---|
| 1191 | m_cpt_ll++; |
---|
| 1192 | m_cost_unc_frz++; |
---|
| 1193 | r_dcache_unc_req = true; |
---|
| 1194 | r_dcache_fsm = DCACHE_UNC_WAIT; |
---|
| 1195 | } |
---|
| 1196 | else if(dreq.type == iss_t::DATA_SC) // conditional write |
---|
| 1197 | // all SC requests are handled as uncachable |
---|
| 1198 | { |
---|
| 1199 | m_cpt_sc++; |
---|
| 1200 | m_cost_unc_frz++; |
---|
| 1201 | r_dcache_unc_req = true; |
---|
| 1202 | r_dcache_fsm = DCACHE_UNC_WAIT; |
---|
| 1203 | } |
---|
| 1204 | else if((dreq.type == iss_t::XTN_WRITE) || (dreq.type == iss_t::XTN_READ)) // XTN access |
---|
| 1205 | // only INVAL & SYNC requests are supported |
---|
| 1206 | { |
---|
| 1207 | drsp.valid = true; |
---|
| 1208 | drsp.rdata = 0; |
---|
| 1209 | if ( dreq.addr/4 == iss_t::XTN_DCACHE_INVAL ) |
---|
| 1210 | { |
---|
| 1211 | r_dcache_fsm = DCACHE_INVAL; |
---|
| 1212 | } |
---|
| 1213 | else if ( dreq.addr/4 == iss_t::XTN_SYNC ) |
---|
| 1214 | { |
---|
| 1215 | r_dcache_fsm = DCACHE_SYNC; |
---|
| 1216 | } |
---|
| 1217 | else if ( dreq.addr/4 == iss_t::XTN_TLB_MODE ) |
---|
| 1218 | { |
---|
| 1219 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 1220 | } |
---|
| 1221 | else |
---|
| 1222 | { |
---|
| 1223 | std::cout << "warning in VCI_CC_XCACHE_WRAPPER " << name() << std::endl; |
---|
| 1224 | std::cout << "unsupported external access : " << dreq.addr/4 << std::endl; |
---|
| 1225 | std::cout << "only TLB_MODE, DCACHE_INVAL & SYNC are supported" << std::endl; |
---|
| 1226 | } |
---|
| 1227 | } |
---|
| 1228 | } |
---|
| 1229 | else // no dreq.valid |
---|
[2] | 1230 | { |
---|
[45] | 1231 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 1232 | drsp.valid = true; |
---|
| 1233 | drsp.rdata = 0; |
---|
[2] | 1234 | } |
---|
| 1235 | break; |
---|
[45] | 1236 | } |
---|
[2] | 1237 | case DCACHE_WRITE_UPDT: |
---|
| 1238 | { |
---|
| 1239 | m_cpt_dcache_data_write++; |
---|
| 1240 | data_t mask = vci_param::be2mask(r_dcache_be_save); |
---|
| 1241 | data_t wdata = (mask & r_dcache_wdata_save) | (~mask & r_dcache_rdata_save); |
---|
| 1242 | r_dcache.write( r_dcache_addr_save, wdata ); |
---|
| 1243 | r_dcache_fsm = DCACHE_WRITE_REQ; |
---|
| 1244 | break; |
---|
| 1245 | } |
---|
| 1246 | case DCACHE_MISS_SELECT: // select a victim |
---|
| 1247 | { |
---|
| 1248 | m_cost_data_miss_frz++; |
---|
| 1249 | size_t way; |
---|
| 1250 | addr_t index; |
---|
[45] | 1251 | addr_t addr = r_dcache_addr_save; |
---|
| 1252 | if ( r_dcache.select_before_update( addr, &way, &index) ) |
---|
[2] | 1253 | { |
---|
| 1254 | r_dcache_fsm = DCACHE_MISS_CLEANUP; |
---|
| 1255 | r_dcache_cleanup_save = index; |
---|
| 1256 | r_dcache_way_save = way; |
---|
| 1257 | } |
---|
| 1258 | else |
---|
| 1259 | { |
---|
| 1260 | r_dcache_way_save = way; |
---|
| 1261 | r_dcache_fsm = DCACHE_MISS_WAIT; |
---|
| 1262 | } |
---|
| 1263 | break; |
---|
| 1264 | } |
---|
| 1265 | case DCACHE_MISS_CLEANUP: // try to post a cleanup request to the CLEANUP FSM |
---|
| 1266 | { |
---|
| 1267 | m_cost_data_miss_frz++; |
---|
| 1268 | if ( r_tgt_dcache_req ) // coherence request |
---|
| 1269 | { |
---|
| 1270 | r_dcache_fsm = DCACHE_CC_CHECK; |
---|
| 1271 | r_dcache_fsm_save = r_dcache_fsm; |
---|
| 1272 | break; |
---|
| 1273 | } |
---|
| 1274 | if ( !r_dcache_cleanup_req ) // no pending cleanup |
---|
| 1275 | { |
---|
| 1276 | r_dcache_cleanup_req = true; |
---|
| 1277 | r_dcache_cleanup_line = r_dcache_cleanup_save; |
---|
| 1278 | r_dcache_fsm = DCACHE_MISS_WAIT; |
---|
| 1279 | } |
---|
| 1280 | break; |
---|
| 1281 | } |
---|
| 1282 | case DCACHE_MISS_WAIT: // waiting the response from the RSP FSM |
---|
| 1283 | { |
---|
| 1284 | m_cost_data_miss_frz++; |
---|
| 1285 | if ( r_tgt_dcache_req ) // coherence request |
---|
| 1286 | { |
---|
| 1287 | r_dcache_fsm = DCACHE_CC_CHECK; |
---|
| 1288 | r_dcache_fsm_save = r_dcache_fsm; |
---|
| 1289 | break; |
---|
| 1290 | } |
---|
| 1291 | if ( r_rsp_data_ok ) // there is a response |
---|
| 1292 | { |
---|
| 1293 | if ( r_rsp_data_error ) r_dcache_fsm = DCACHE_ERROR; |
---|
| 1294 | else if ( !r_dcache_inval_pending ) r_dcache_fsm = DCACHE_MISS_UPDT; |
---|
| 1295 | else |
---|
| 1296 | { |
---|
| 1297 | if ( r_dcache_cleanup_req ) |
---|
| 1298 | { |
---|
| 1299 | break; |
---|
| 1300 | } |
---|
| 1301 | else |
---|
| 1302 | { |
---|
[45] | 1303 | // the cache is not updated in case of pending inval |
---|
[2] | 1304 | r_dcache_cleanup_req = true; |
---|
| 1305 | r_dcache_cleanup_line = r_dcache_addr_save >> (uint32_log2(m_icache_words) + 2); |
---|
| 1306 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 1307 | r_dcache_inval_pending = false; |
---|
| 1308 | } |
---|
| 1309 | } |
---|
| 1310 | } |
---|
| 1311 | break; |
---|
| 1312 | } |
---|
| 1313 | case DCACHE_MISS_UPDT: // update the cache |
---|
| 1314 | { |
---|
| 1315 | m_cost_data_miss_frz++; |
---|
| 1316 | m_cpt_dcache_dir_write++; |
---|
| 1317 | m_cpt_dcache_data_write++; |
---|
| 1318 | addr_t ad = (addr_t) r_dcache_addr_save; |
---|
| 1319 | data_t* buf = (data_t*) r_dcache_miss_buf; |
---|
| 1320 | size_t way = (size_t) r_dcache_way_save; |
---|
| 1321 | r_dcache.update_after_select( buf, way, ad ); |
---|
| 1322 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 1323 | break; |
---|
| 1324 | } |
---|
| 1325 | case DCACHE_UNC_WAIT: |
---|
| 1326 | { |
---|
[45] | 1327 | if ( dreq.valid ) m_cost_unc_frz++; |
---|
[2] | 1328 | if ( r_tgt_dcache_req ) // external request |
---|
| 1329 | { |
---|
| 1330 | r_dcache_fsm = DCACHE_CC_CHECK; |
---|
| 1331 | r_dcache_fsm_save = r_dcache_fsm; |
---|
| 1332 | break; |
---|
| 1333 | } |
---|
| 1334 | if ( r_rsp_data_ok ) |
---|
| 1335 | { |
---|
[45] | 1336 | if ( r_rsp_data_error ) r_dcache_fsm = DCACHE_ERROR; |
---|
| 1337 | else r_dcache_fsm = DCACHE_UNC_GO; |
---|
[2] | 1338 | } |
---|
| 1339 | break; |
---|
| 1340 | } |
---|
[45] | 1341 | case DCACHE_UNC_GO: |
---|
| 1342 | { |
---|
| 1343 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 1344 | drsp.valid = true; |
---|
| 1345 | drsp.rdata = r_dcache_miss_buf[0]; |
---|
| 1346 | break; |
---|
| 1347 | } |
---|
[2] | 1348 | case DCACHE_ERROR: |
---|
| 1349 | { |
---|
| 1350 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 1351 | r_rsp_data_error = false; |
---|
| 1352 | drsp.error = true; |
---|
| 1353 | drsp.valid = true; |
---|
| 1354 | break; |
---|
| 1355 | } |
---|
[45] | 1356 | case DCACHE_INVAL: // local inval requiring a cleanup in case of hit |
---|
[2] | 1357 | { |
---|
| 1358 | if( !r_dcache_cleanup_req ) |
---|
| 1359 | { |
---|
| 1360 | m_cpt_dcache_dir_read += m_dcache_ways; |
---|
| 1361 | r_dcache_cleanup_req = r_dcache.inval( r_dcache_addr_save ); |
---|
| 1362 | r_dcache_cleanup_line = r_dcache_addr_save.read() >> (uint32_log2(m_dcache_words)+2); |
---|
| 1363 | r_dcache_fsm = DCACHE_IDLE; |
---|
| 1364 | } |
---|
| 1365 | break; |
---|
| 1366 | } |
---|
| 1367 | case DCACHE_SYNC: |
---|
| 1368 | { |
---|
| 1369 | if ( r_wbuf.empty() ) r_dcache_fsm = DCACHE_IDLE; |
---|
| 1370 | break; |
---|
| 1371 | } |
---|
| 1372 | case DCACHE_CC_CHECK: // read directory in case of external request |
---|
[45] | 1373 | { |
---|
[2] | 1374 | m_cpt_dcache_dir_read += m_dcache_ways; |
---|
| 1375 | m_cpt_dcache_data_read += m_dcache_ways; |
---|
[45] | 1376 | if ( ( (r_dcache_fsm_save == DCACHE_MISS_WAIT) || (r_dcache_fsm_save == DCACHE_MISS_CLEANUP) ) && |
---|
[2] | 1377 | ((r_dcache_addr_save & ~((m_dcache_words<<2)-1))==(r_tgt_addr & ~((m_dcache_words<<2)-1)))) |
---|
[45] | 1378 | // external request matches a miss |
---|
| 1379 | { |
---|
| 1380 | r_dcache_inval_pending = true; |
---|
| 1381 | r_tgt_dcache_req = false; |
---|
| 1382 | r_tgt_dcache_rsp = r_tgt_update; // always a response to an update |
---|
| 1383 | r_dcache_fsm = r_dcache_fsm_save; |
---|
| 1384 | } |
---|
| 1385 | else // the external request is not matching a pending miss |
---|
| 1386 | { |
---|
| 1387 | data_t data; |
---|
| 1388 | bool dcache_hit = r_dcache.read(r_tgt_addr, &data); |
---|
| 1389 | if ( dcache_hit && r_tgt_update ) // hit update |
---|
[2] | 1390 | { |
---|
[45] | 1391 | r_dcache_fsm = DCACHE_CC_UPDT; |
---|
[2] | 1392 | } |
---|
[45] | 1393 | else if ( dcache_hit && !r_tgt_update ) // hit inval |
---|
[2] | 1394 | { |
---|
[45] | 1395 | r_dcache_fsm = DCACHE_CC_INVAL; |
---|
| 1396 | } |
---|
| 1397 | else // miss |
---|
| 1398 | { |
---|
| 1399 | r_tgt_dcache_req = false; |
---|
| 1400 | r_tgt_dcache_rsp = r_tgt_update; // always a respons in case of update |
---|
| 1401 | r_dcache_fsm = r_dcache_fsm_save; |
---|
[2] | 1402 | } |
---|
[45] | 1403 | } |
---|
| 1404 | break; |
---|
| 1405 | } |
---|
| 1406 | case DCACHE_CC_UPDT: // update the cache line |
---|
| 1407 | { |
---|
| 1408 | m_cpt_dcache_dir_write++; |
---|
| 1409 | m_cpt_dcache_data_write++; |
---|
| 1410 | for(size_t i=0; i<m_dcache_words; i++) |
---|
| 1411 | { |
---|
| 1412 | if(r_tgt_val[i]) r_dcache.write( (r_tgt_addr + i*4), r_tgt_buf[i] ); |
---|
| 1413 | } |
---|
| 1414 | r_tgt_dcache_rsp = true; |
---|
| 1415 | r_tgt_dcache_req = false; |
---|
| 1416 | r_dcache_fsm = r_dcache_fsm_save; |
---|
| 1417 | break; |
---|
| 1418 | } |
---|
| 1419 | case DCACHE_CC_INVAL: // invalidate a cache line |
---|
| 1420 | { |
---|
[2] | 1421 | r_dcache.inval(r_tgt_addr); |
---|
| 1422 | r_tgt_dcache_rsp = true; |
---|
| 1423 | r_tgt_dcache_req = false; |
---|
| 1424 | r_dcache_fsm = r_dcache_fsm_save; |
---|
| 1425 | break; |
---|
[45] | 1426 | } |
---|
[2] | 1427 | } // end switch r_dcache_fsm |
---|
| 1428 | |
---|
[45] | 1429 | ////////// write buffer state update ///////////// |
---|
| 1430 | // The update() method must be called at each cycle to update the internal state. |
---|
| 1431 | // All pending write requests must be locked in case of SYNC or in case of MISS. |
---|
| 1432 | if( (r_dcache_fsm == DCACHE_SYNC) || (r_dcache_fsm == DCACHE_MISS_WAIT) ) |
---|
| 1433 | { |
---|
| 1434 | r_wbuf.update(true); |
---|
| 1435 | } |
---|
| 1436 | else |
---|
| 1437 | { |
---|
| 1438 | r_wbuf.update(false); |
---|
| 1439 | } |
---|
[2] | 1440 | |
---|
| 1441 | #if SOCLIB_MODULE_DEBUG |
---|
| 1442 | std::cout << ireq << std::endl << irsp << std::endl << dreq << std::endl << drsp << std::endl; |
---|
| 1443 | #endif |
---|
| 1444 | |
---|
| 1445 | /////////// execute one iss cycle ///////////////////////////////////////////// |
---|
| 1446 | { |
---|
| 1447 | uint32_t it = 0; |
---|
| 1448 | for (size_t i=0; i<(size_t)iss_t::n_irq; i++) |
---|
| 1449 | if(p_irq[i].read()) it |= (1<<i); |
---|
| 1450 | m_iss.executeNCycles(1, irsp, drsp, it); |
---|
| 1451 | } |
---|
| 1452 | |
---|
| 1453 | if ( (ireq.valid && !irsp.valid) || (dreq.valid && !drsp.valid) ) m_cpt_frz_cycles++; |
---|
| 1454 | |
---|
| 1455 | //////////////////////////////////////////////////////////////////////////// |
---|
| 1456 | // This CLEANUP FSM controls the transmission of the cleanup transactions |
---|
| 1457 | // on the coherence network. It controls the following ressources: |
---|
| 1458 | // - r_cleanup_fsm |
---|
[45] | 1459 | // - r_dcache_cleanup_req (reset) |
---|
| 1460 | // - r_icache_cleanup_req (reset) |
---|
[2] | 1461 | // |
---|
| 1462 | // This FSM handles cleanup requests from both the DCACHE FSM & ICACHE FSM |
---|
[45] | 1463 | // - Instruction Cleanup : r_icache_cleanup_req |
---|
| 1464 | // - Data Cleanup : r_dcache_cleanup_req |
---|
[2] | 1465 | // In case of simultaneous requests, the data request have highest priority. |
---|
| 1466 | // There is only one cleanup transaction at a given time (sequencial behavior) |
---|
| 1467 | // because the same FSM controls both command & response. |
---|
| 1468 | // The the r_icache_cleanup_req & r_dcache_cleanup_req are reset only |
---|
| 1469 | // when the response packet is received. |
---|
| 1470 | // Error handling : |
---|
| 1471 | // As the coherence trafic is controled by hardware, errors are not reported |
---|
| 1472 | // to software : In case of errors, the simulation stops. |
---|
| 1473 | //////////////////////////////////////////////////////////////////////////// |
---|
| 1474 | |
---|
| 1475 | switch (r_cleanup_fsm) { |
---|
| 1476 | |
---|
[45] | 1477 | case CLEANUP_IDLE: |
---|
[2] | 1478 | { |
---|
| 1479 | if ( p_vci_ini_c.cmdack ) |
---|
| 1480 | { |
---|
[45] | 1481 | if (r_dcache_cleanup_req) r_cleanup_fsm = CLEANUP_DCACHE; |
---|
| 1482 | else if (r_icache_cleanup_req) r_cleanup_fsm = CLEANUP_ICACHE; |
---|
[2] | 1483 | } |
---|
| 1484 | break; |
---|
| 1485 | } |
---|
[45] | 1486 | case CLEANUP_DCACHE: |
---|
[2] | 1487 | { |
---|
| 1488 | if ( p_vci_ini_c.rspval ) |
---|
| 1489 | { |
---|
| 1490 | assert( p_vci_ini_c.reop && (p_vci_ini_c.rtrdid.read() == 0) && |
---|
| 1491 | "illegal response packet received for a cleanup transaction"); |
---|
| 1492 | assert( (p_vci_ini_c.rerror.read() == vci_param::ERR_NORMAL) && |
---|
| 1493 | "error signaled in a cleanup response" ); |
---|
| 1494 | |
---|
[45] | 1495 | r_cleanup_fsm = CLEANUP_IDLE; |
---|
[2] | 1496 | r_dcache_cleanup_req = false; |
---|
[45] | 1497 | m_cpt_cc_cleanup_data++; |
---|
[2] | 1498 | } |
---|
| 1499 | break; |
---|
| 1500 | } |
---|
[45] | 1501 | case CLEANUP_ICACHE: |
---|
[2] | 1502 | { |
---|
| 1503 | if ( p_vci_ini_c.rspval ) |
---|
| 1504 | { |
---|
| 1505 | assert( p_vci_ini_c.reop && (p_vci_ini_c.rtrdid.read() == 1) && |
---|
| 1506 | "illegal response packet received for a cleanup transaction"); |
---|
| 1507 | assert( (p_vci_ini_c.rerror.read() == vci_param::ERR_NORMAL) && |
---|
| 1508 | "error signaled in a cleanup response" ); |
---|
| 1509 | |
---|
[45] | 1510 | r_cleanup_fsm = CLEANUP_IDLE; |
---|
[2] | 1511 | r_icache_cleanup_req = false; |
---|
[45] | 1512 | m_cpt_cc_cleanup_ins++; |
---|
[2] | 1513 | } |
---|
| 1514 | break; |
---|
| 1515 | } |
---|
| 1516 | } // end switch r_cleanup_fsm |
---|
| 1517 | |
---|
| 1518 | //////////////////////////////////////////////////////////////////////////// |
---|
| 1519 | // The CMD FSM controls the transmission of read & write requests |
---|
| 1520 | // on the direct network. It controls the following ressources: |
---|
| 1521 | // - r_cmd_fsm |
---|
| 1522 | // - r_cmd_min |
---|
| 1523 | // - r_cmd_max |
---|
| 1524 | // - r_cmd_cpt |
---|
| 1525 | // - r_dcache_miss_req reset |
---|
| 1526 | // - r_dcache_unc_req reset |
---|
| 1527 | // - r_icache_miss_req reset |
---|
| 1528 | // - r_icache_unc_req reset |
---|
| 1529 | // - wbuf sent() |
---|
| 1530 | // |
---|
| 1531 | // This FSM handles requests from both the DCACHE FSM & the ICACHE FSM. |
---|
| 1532 | // There is 5 request types, with the following priorities : |
---|
| 1533 | // 1 - Data Read Miss : r_dcache_miss_req (if no hit in the write buffer) |
---|
[45] | 1534 | // 2 - Data Read Uncachable : r_dcache_unc_req (if no hit in the write buffer) |
---|
[2] | 1535 | // 3 - Instruction Miss : r_icache_miss_req (if no hit in the write buffer) |
---|
[45] | 1536 | // 4 - Instruction Uncachable : r_icache_unc_req (if no hit in the write buffer) |
---|
[2] | 1537 | // 5 - Data Write : r_wbuf.rok() |
---|
| 1538 | // The read requests have highest priority, because the processor is blocked. |
---|
| 1539 | // |
---|
| 1540 | // VCI formats: |
---|
| 1541 | // According to the VCI advanced specification, all read requests packets |
---|
[45] | 1542 | // (read Uncachable, Miss data, Miss instruction) are one word packets. |
---|
[2] | 1543 | // For write burst packets, all words must be in the same cache line, |
---|
| 1544 | // and addresses must be contiguous (the BE field is 0 in case of "holes"). |
---|
| 1545 | // The PLEN VCI field is always documented. |
---|
[45] | 1546 | // As simultaneous VCI transactions are supported, the TRDID field is used: |
---|
| 1547 | // - Write transactions : TRDID = wbuf_index + (1<<(trdid_size-1)) |
---|
| 1548 | // - Read transactions : TRDID = 2*cachable + instruction |
---|
| 1549 | /////////////////////////////////////////////////////////////////////////////////// |
---|
[2] | 1550 | |
---|
| 1551 | switch (r_cmd_fsm) { |
---|
| 1552 | |
---|
| 1553 | case CMD_IDLE: |
---|
[45] | 1554 | { |
---|
| 1555 | size_t min; |
---|
| 1556 | size_t max; |
---|
[2] | 1557 | if ( r_dcache_miss_req & r_wbuf.miss( r_dcache_addr_save ) ) |
---|
| 1558 | { |
---|
| 1559 | r_cmd_fsm = CMD_DATA_MISS; |
---|
| 1560 | r_dcache_miss_req = false; |
---|
| 1561 | m_cpt_dmiss_transaction++; |
---|
| 1562 | } |
---|
| 1563 | else if ( r_icache_miss_req & r_wbuf.miss( r_icache_addr_save ) ) |
---|
| 1564 | { |
---|
| 1565 | r_cmd_fsm = CMD_INS_MISS; |
---|
| 1566 | r_icache_miss_req = false; |
---|
| 1567 | m_cpt_imiss_transaction++; |
---|
| 1568 | } |
---|
[45] | 1569 | else if ( r_wbuf.rok(&min, &max) ) |
---|
[2] | 1570 | { |
---|
[45] | 1571 | r_cmd_fsm = CMD_DATA_WRITE; |
---|
| 1572 | r_cmd_cpt = min; |
---|
| 1573 | r_cmd_min = min; |
---|
| 1574 | r_cmd_max = max; |
---|
| 1575 | m_cpt_write_transaction++; |
---|
| 1576 | m_length_write_transaction += (max-min+1); |
---|
| 1577 | } |
---|
| 1578 | else if ( r_dcache_unc_req ) |
---|
| 1579 | { |
---|
| 1580 | r_cmd_fsm = CMD_DATA_UNC; |
---|
| 1581 | r_dcache_unc_req = false; |
---|
| 1582 | m_cpt_data_unc_transaction++; |
---|
| 1583 | } |
---|
| 1584 | else if ( r_icache_unc_req ) |
---|
| 1585 | { |
---|
[2] | 1586 | r_cmd_fsm = CMD_INS_UNC; |
---|
| 1587 | r_icache_unc_req = false; |
---|
[45] | 1588 | m_cpt_ins_unc_transaction++; |
---|
[2] | 1589 | } |
---|
| 1590 | break; |
---|
[45] | 1591 | } |
---|
[2] | 1592 | case CMD_DATA_WRITE: |
---|
[45] | 1593 | { |
---|
[2] | 1594 | if ( p_vci_ini_d.cmdack.read() ) |
---|
| 1595 | { |
---|
| 1596 | r_cmd_cpt = r_cmd_cpt + 1; |
---|
| 1597 | if (r_cmd_cpt == r_cmd_max) |
---|
| 1598 | { |
---|
| 1599 | r_cmd_fsm = CMD_IDLE ; |
---|
| 1600 | r_wbuf.sent() ; |
---|
| 1601 | } |
---|
| 1602 | } |
---|
| 1603 | break; |
---|
[45] | 1604 | } |
---|
[2] | 1605 | case CMD_INS_MISS: |
---|
| 1606 | case CMD_INS_UNC: |
---|
| 1607 | case CMD_DATA_MISS: |
---|
| 1608 | case CMD_DATA_UNC: |
---|
[45] | 1609 | { |
---|
[2] | 1610 | if ( p_vci_ini_d.cmdack.read() ) r_cmd_fsm = CMD_IDLE; |
---|
| 1611 | break; |
---|
[45] | 1612 | } |
---|
[2] | 1613 | } // end switch r_cmd_fsm |
---|
| 1614 | |
---|
| 1615 | ////////////////////////////////////////////////////////////////////////// |
---|
| 1616 | // The RSP FSM receive the response packets on the direct network. |
---|
| 1617 | // It controls the following ressources: |
---|
| 1618 | // - r_rsp_fsm: |
---|
| 1619 | // - r_icache_miss_buf[m_icache_words] |
---|
| 1620 | // - r_dcache_miss_buf[m_dcache_words] |
---|
| 1621 | // - r_icache_miss_req reset |
---|
| 1622 | // - r_icache_unc_req reset |
---|
| 1623 | // - r_dcache_miss_req reset |
---|
| 1624 | // - r_dcache_unc_req reset |
---|
| 1625 | // - r_icache_cleanup_req reset |
---|
| 1626 | // - r_dcache_cleanup_req reset |
---|
| 1627 | // - r_rsp_data_ok set |
---|
| 1628 | // - r_rsp_ins_ok set |
---|
| 1629 | // - r_rsp_data_error set |
---|
| 1630 | // - r_rsp_ins_error set |
---|
| 1631 | // - r_rsp_cpt |
---|
| 1632 | // |
---|
| 1633 | // VCI formats: |
---|
| 1634 | // This component accepts only single word write response packets. |
---|
[45] | 1635 | // As simultaneous VCI transactions are supported, the TRDID field is used: |
---|
| 1636 | // - Write transactions : TRDID = wbuf_index + (1<<(trdid_size-1)) |
---|
| 1637 | // - Read transactions : TRDID = 2*cachable + instruction |
---|
[2] | 1638 | // |
---|
| 1639 | // Error handling: |
---|
[45] | 1640 | // - In case of Write error, the error is directly signaled by the RSP FSM. |
---|
| 1641 | // - In case of Read Data Error, the VCI_RSP FSM sets the r_rsp_data_error |
---|
| 1642 | // flip_flop and the error is signaled by the DCACHE FSM. |
---|
| 1643 | // - In case of Instruction Error, the VCI_RSP FSM sets the r_rsp_ins_error |
---|
| 1644 | // flip_flop and the error is signaled by the ICACHE FSM. |
---|
[2] | 1645 | ////////////////////////////////////////////////////////////////////////// |
---|
[45] | 1646 | // Implementation note |
---|
| 1647 | // It should be possible to save one cycle on the MISS cost by a simple |
---|
| 1648 | // modification of this RSP FSM : The first flit of a valid response |
---|
| 1649 | // could be decoded and handled directly in the IDLE state. |
---|
| 1650 | // The computation of the RSPACK condition become more complex... |
---|
| 1651 | //////////////////////////////////////////////////////////////////////////: |
---|
[2] | 1652 | |
---|
| 1653 | switch (r_rsp_fsm) { |
---|
| 1654 | |
---|
| 1655 | case RSP_IDLE: |
---|
[45] | 1656 | { |
---|
[2] | 1657 | if( p_vci_ini_d.rspval.read() ) |
---|
| 1658 | { |
---|
| 1659 | r_rsp_cpt = 0; |
---|
[45] | 1660 | if ( (p_vci_ini_d.rtrdid.read()>>(vci_param::T-1)) != 0 ) r_rsp_fsm = RSP_DATA_WRITE; |
---|
| 1661 | else if ( p_vci_ini_d.rtrdid.read() == TYPE_DATA_MISS ) r_rsp_fsm = RSP_DATA_MISS; |
---|
| 1662 | else if ( p_vci_ini_d.rtrdid.read() == TYPE_DATA_UNC ) r_rsp_fsm = RSP_DATA_UNC; |
---|
| 1663 | else if ( p_vci_ini_d.rtrdid.read() == TYPE_INS_MISS ) r_rsp_fsm = RSP_INS_MISS; |
---|
| 1664 | else if ( p_vci_ini_d.rtrdid.read() == TYPE_INS_UNC ) r_rsp_fsm = RSP_INS_UNC; |
---|
[2] | 1665 | } |
---|
| 1666 | break; |
---|
[45] | 1667 | } |
---|
[2] | 1668 | case RSP_DATA_WRITE: |
---|
[45] | 1669 | { |
---|
[2] | 1670 | if ( p_vci_ini_d.rspval.read() ) |
---|
| 1671 | { |
---|
| 1672 | assert(p_vci_ini_d.reop.read() && |
---|
[45] | 1673 | "A VCI response packet must contain one flit for a write transaction"); |
---|
[2] | 1674 | r_rsp_fsm = RSP_IDLE; |
---|
[45] | 1675 | r_wbuf.completed( p_vci_ini_d.rtrdid.read() - (1<<(vci_param::T-1)) ); |
---|
[2] | 1676 | if ( p_vci_ini_d.rerror.read() != vci_param::ERR_NORMAL ) m_iss.setWriteBerr(); |
---|
| 1677 | } |
---|
| 1678 | break; |
---|
[45] | 1679 | } |
---|
[2] | 1680 | case RSP_INS_MISS: |
---|
[45] | 1681 | { |
---|
[2] | 1682 | if ( p_vci_ini_d.rspval.read() ) |
---|
| 1683 | { |
---|
| 1684 | assert( (r_rsp_cpt < m_icache_words) && |
---|
| 1685 | "The VCI response packet for instruction miss is too long" ); |
---|
| 1686 | r_rsp_cpt = r_rsp_cpt + 1; |
---|
| 1687 | r_icache_miss_buf[r_rsp_cpt] = (data_t)p_vci_ini_d.rdata.read(); |
---|
| 1688 | if ( p_vci_ini_d.reop.read() ) { |
---|
| 1689 | assert( (r_rsp_cpt == m_icache_words - 1) && |
---|
| 1690 | "The VCI response packet for instruction miss is too short"); |
---|
| 1691 | r_rsp_ins_ok = true; |
---|
| 1692 | r_rsp_fsm = RSP_IDLE; |
---|
| 1693 | } |
---|
| 1694 | if ( p_vci_ini_d.rerror.read() != vci_param::ERR_NORMAL ) r_rsp_ins_error = true; |
---|
| 1695 | } |
---|
| 1696 | break; |
---|
[45] | 1697 | } |
---|
[2] | 1698 | case RSP_INS_UNC: |
---|
[45] | 1699 | { |
---|
[2] | 1700 | if ( p_vci_ini_d.rspval.read() ) |
---|
| 1701 | { |
---|
| 1702 | assert(p_vci_ini_d.reop.read() && |
---|
[45] | 1703 | "illegal VCI response packet for uncachable instruction"); |
---|
[2] | 1704 | r_icache_miss_buf[0] = (data_t)p_vci_ini_d.rdata.read(); |
---|
| 1705 | r_rsp_ins_ok = true; |
---|
| 1706 | r_rsp_fsm = RSP_IDLE; |
---|
| 1707 | if ( p_vci_ini_d.rerror.read() != vci_param::ERR_NORMAL ) r_rsp_ins_error = true; |
---|
| 1708 | } |
---|
| 1709 | break; |
---|
[45] | 1710 | } |
---|
[2] | 1711 | case RSP_DATA_MISS: |
---|
[45] | 1712 | { |
---|
[2] | 1713 | if ( p_vci_ini_d.rspval.read() ) |
---|
| 1714 | { |
---|
[45] | 1715 | assert( (r_rsp_cpt < m_dcache_words) && |
---|
| 1716 | "The VCI response packet for data miss is too long" ); |
---|
[2] | 1717 | r_rsp_cpt = r_rsp_cpt + 1; |
---|
| 1718 | r_dcache_miss_buf[r_rsp_cpt] = (data_t)p_vci_ini_d.rdata.read(); |
---|
| 1719 | if ( p_vci_ini_d.reop.read() ) |
---|
| 1720 | { |
---|
| 1721 | assert(r_rsp_cpt == m_dcache_words - 1 && |
---|
[45] | 1722 | "The VCI response packet for data miss is too short" ); |
---|
[2] | 1723 | r_rsp_data_ok = true; |
---|
| 1724 | r_rsp_fsm = RSP_IDLE; |
---|
| 1725 | } |
---|
| 1726 | if ( p_vci_ini_d.rerror.read() != vci_param::ERR_NORMAL ) r_rsp_data_error = true; |
---|
| 1727 | } |
---|
| 1728 | break; |
---|
[45] | 1729 | } |
---|
[2] | 1730 | case RSP_DATA_UNC: |
---|
[45] | 1731 | { |
---|
[2] | 1732 | if ( p_vci_ini_d.rspval.read() ) |
---|
| 1733 | { |
---|
| 1734 | assert(p_vci_ini_d.reop.read() && |
---|
[45] | 1735 | "illegal VCI response packet for uncachable data"); |
---|
[2] | 1736 | r_dcache_miss_buf[0] = (data_t)p_vci_ini_d.rdata.read(); |
---|
| 1737 | r_rsp_data_ok = true; |
---|
| 1738 | r_rsp_fsm = RSP_IDLE; |
---|
| 1739 | if ( p_vci_ini_d.rerror.read() != vci_param::ERR_NORMAL ) r_rsp_data_error = true; |
---|
| 1740 | } |
---|
| 1741 | break; |
---|
[45] | 1742 | } |
---|
[2] | 1743 | } // end switch r_rsp_fsm |
---|
| 1744 | |
---|
| 1745 | } // end transition() |
---|
| 1746 | |
---|
[45] | 1747 | ////////////////////// |
---|
[2] | 1748 | tmpl(void)::genMoore() |
---|
| 1749 | { |
---|
| 1750 | // Coherence network (initiator port) |
---|
| 1751 | |
---|
| 1752 | switch ( r_cleanup_fsm.read() ) { |
---|
| 1753 | |
---|
[45] | 1754 | case CLEANUP_IDLE: |
---|
[2] | 1755 | p_vci_ini_c.rspack = false; |
---|
| 1756 | p_vci_ini_c.cmdval = r_icache_cleanup_req || r_dcache_cleanup_req; |
---|
| 1757 | if ( r_dcache_cleanup_req ) |
---|
| 1758 | { |
---|
[45] | 1759 | p_vci_ini_c.address = r_dcache_cleanup_line.read() * (m_dcache_words << 2); |
---|
[2] | 1760 | p_vci_ini_c.trdid = 0; |
---|
| 1761 | } |
---|
| 1762 | else |
---|
| 1763 | { |
---|
[45] | 1764 | p_vci_ini_c.address = r_icache_cleanup_line.read() * (m_icache_words << 2); |
---|
[2] | 1765 | p_vci_ini_c.trdid = 1; |
---|
| 1766 | } |
---|
| 1767 | p_vci_ini_c.wdata = 0; |
---|
| 1768 | p_vci_ini_c.be = 0xF; |
---|
| 1769 | p_vci_ini_c.plen = 4; |
---|
| 1770 | p_vci_ini_c.cmd = vci_param::CMD_WRITE; |
---|
| 1771 | p_vci_ini_c.pktid = 0; |
---|
| 1772 | p_vci_ini_c.srcid = m_srcid_c; |
---|
| 1773 | p_vci_ini_c.cons = false; |
---|
| 1774 | p_vci_ini_c.wrap = false; |
---|
| 1775 | p_vci_ini_c.contig = false; |
---|
| 1776 | p_vci_ini_c.clen = 0; |
---|
| 1777 | p_vci_ini_c.cfixed = false; |
---|
| 1778 | p_vci_ini_c.eop = true; |
---|
| 1779 | break; |
---|
| 1780 | |
---|
[45] | 1781 | case CLEANUP_DCACHE: |
---|
[2] | 1782 | p_vci_ini_c.rspack = true; |
---|
| 1783 | p_vci_ini_c.cmdval = false; |
---|
| 1784 | p_vci_ini_c.address = 0; |
---|
| 1785 | p_vci_ini_c.wdata = 0; |
---|
| 1786 | p_vci_ini_c.be = 0; |
---|
| 1787 | p_vci_ini_c.plen = 0; |
---|
| 1788 | p_vci_ini_c.cmd = vci_param::CMD_WRITE; |
---|
| 1789 | p_vci_ini_c.trdid = 0; |
---|
| 1790 | p_vci_ini_c.pktid = 0; |
---|
| 1791 | p_vci_ini_c.srcid = 0; |
---|
| 1792 | p_vci_ini_c.cons = false; |
---|
| 1793 | p_vci_ini_c.wrap = false; |
---|
| 1794 | p_vci_ini_c.contig = false; |
---|
| 1795 | p_vci_ini_c.clen = 0; |
---|
| 1796 | p_vci_ini_c.cfixed = false; |
---|
| 1797 | p_vci_ini_c.eop = false; |
---|
| 1798 | break; |
---|
| 1799 | |
---|
[45] | 1800 | case CLEANUP_ICACHE: |
---|
[2] | 1801 | p_vci_ini_c.rspack = true; |
---|
| 1802 | p_vci_ini_c.cmdval = false; |
---|
| 1803 | p_vci_ini_c.address = 0; |
---|
| 1804 | p_vci_ini_c.wdata = 0; |
---|
| 1805 | p_vci_ini_c.be = 0; |
---|
| 1806 | p_vci_ini_c.plen = 0; |
---|
| 1807 | p_vci_ini_c.cmd = vci_param::CMD_WRITE; |
---|
| 1808 | p_vci_ini_c.trdid = 0; |
---|
| 1809 | p_vci_ini_c.pktid = 0; |
---|
| 1810 | p_vci_ini_c.srcid = 0; |
---|
| 1811 | p_vci_ini_c.cons = false; |
---|
| 1812 | p_vci_ini_c.wrap = false; |
---|
| 1813 | p_vci_ini_c.contig = false; |
---|
| 1814 | p_vci_ini_c.clen = 0; |
---|
| 1815 | p_vci_ini_c.cfixed = false; |
---|
| 1816 | p_vci_ini_c.eop = false; |
---|
| 1817 | break; |
---|
| 1818 | } // end switch r_cleanup_fsm |
---|
| 1819 | |
---|
| 1820 | // Direct network initiator response |
---|
| 1821 | |
---|
| 1822 | p_vci_ini_d.rspack = ( r_rsp_fsm != RSP_IDLE ); |
---|
| 1823 | |
---|
| 1824 | // Direct network initiator command |
---|
| 1825 | |
---|
| 1826 | switch ( r_cmd_fsm ) { |
---|
| 1827 | |
---|
| 1828 | case CMD_IDLE: |
---|
| 1829 | p_vci_ini_d.cmdval = false; |
---|
| 1830 | p_vci_ini_d.address = 0; |
---|
| 1831 | p_vci_ini_d.wdata = 0; |
---|
| 1832 | p_vci_ini_d.be = 0; |
---|
| 1833 | p_vci_ini_d.plen = 0; |
---|
| 1834 | p_vci_ini_d.cmd = vci_param::CMD_WRITE; |
---|
| 1835 | p_vci_ini_d.trdid = 0; |
---|
| 1836 | p_vci_ini_d.pktid = 0; |
---|
| 1837 | p_vci_ini_d.srcid = 0; |
---|
| 1838 | p_vci_ini_d.cons = false; |
---|
| 1839 | p_vci_ini_d.wrap = false; |
---|
| 1840 | p_vci_ini_d.contig = false; |
---|
| 1841 | p_vci_ini_d.clen = 0; |
---|
| 1842 | p_vci_ini_d.cfixed = false; |
---|
| 1843 | p_vci_ini_d.eop = false; |
---|
| 1844 | break; |
---|
| 1845 | |
---|
| 1846 | case CMD_DATA_WRITE: |
---|
| 1847 | p_vci_ini_d.cmdval = true; |
---|
[45] | 1848 | p_vci_ini_d.address = r_wbuf.getAddress(r_cmd_cpt); |
---|
[2] | 1849 | p_vci_ini_d.wdata = r_wbuf.getData(r_cmd_cpt); |
---|
| 1850 | p_vci_ini_d.be = r_wbuf.getBe(r_cmd_cpt); |
---|
| 1851 | p_vci_ini_d.plen = (r_cmd_max - r_cmd_min + 1)<<2; |
---|
| 1852 | p_vci_ini_d.cmd = vci_param::CMD_WRITE; |
---|
[45] | 1853 | p_vci_ini_d.trdid = r_wbuf.getIndex() + (1<<(vci_param::T-1)); |
---|
[2] | 1854 | p_vci_ini_d.pktid = 0; |
---|
| 1855 | p_vci_ini_d.srcid = m_srcid_d; |
---|
| 1856 | p_vci_ini_d.cons = false; |
---|
| 1857 | p_vci_ini_d.wrap = false; |
---|
| 1858 | p_vci_ini_d.contig = true; |
---|
| 1859 | p_vci_ini_d.clen = 0; |
---|
| 1860 | p_vci_ini_d.cfixed = false; |
---|
| 1861 | p_vci_ini_d.eop = (r_cmd_cpt == r_cmd_max); |
---|
| 1862 | break; |
---|
| 1863 | |
---|
[45] | 1864 | case CMD_DATA_MISS: |
---|
| 1865 | p_vci_ini_d.cmdval = true; |
---|
| 1866 | p_vci_ini_d.address = r_dcache_addr_save & (addr_t)m_dcache_yzmask; |
---|
| 1867 | p_vci_ini_d.be = 0xF; |
---|
| 1868 | p_vci_ini_d.plen = m_dcache_words << 2; |
---|
| 1869 | p_vci_ini_d.cmd = vci_param::CMD_READ; |
---|
| 1870 | p_vci_ini_d.trdid = TYPE_DATA_MISS; |
---|
| 1871 | p_vci_ini_d.pktid = 0; |
---|
| 1872 | p_vci_ini_d.srcid = m_srcid_d; |
---|
| 1873 | p_vci_ini_d.cons = false; |
---|
| 1874 | p_vci_ini_d.wrap = false; |
---|
| 1875 | p_vci_ini_d.contig = true; |
---|
| 1876 | p_vci_ini_d.clen = 0; |
---|
| 1877 | p_vci_ini_d.cfixed = false; |
---|
| 1878 | p_vci_ini_d.eop = true; |
---|
| 1879 | break; |
---|
| 1880 | |
---|
[2] | 1881 | case CMD_DATA_UNC: |
---|
| 1882 | p_vci_ini_d.cmdval = true; |
---|
| 1883 | p_vci_ini_d.address = r_dcache_addr_save & ~0x3; |
---|
| 1884 | switch( r_dcache_type_save ) { |
---|
[45] | 1885 | case iss_t::DATA_WRITE: |
---|
| 1886 | p_vci_ini_d.wdata = r_dcache_wdata_save.read(); |
---|
| 1887 | p_vci_ini_d.be = r_dcache_be_save.read(); |
---|
| 1888 | p_vci_ini_d.cmd = vci_param::CMD_WRITE; |
---|
| 1889 | break; |
---|
[2] | 1890 | case iss_t::DATA_READ: |
---|
| 1891 | p_vci_ini_d.wdata = 0; |
---|
| 1892 | p_vci_ini_d.be = r_dcache_be_save.read(); |
---|
| 1893 | p_vci_ini_d.cmd = vci_param::CMD_READ; |
---|
| 1894 | break; |
---|
| 1895 | case iss_t::DATA_LL: |
---|
| 1896 | p_vci_ini_d.wdata = 0; |
---|
| 1897 | p_vci_ini_d.be = 0xF; |
---|
| 1898 | p_vci_ini_d.cmd = vci_param::CMD_LOCKED_READ; |
---|
| 1899 | break; |
---|
| 1900 | case iss_t::DATA_SC: |
---|
| 1901 | p_vci_ini_d.wdata = r_dcache_wdata_save.read(); |
---|
| 1902 | p_vci_ini_d.be = 0xF; |
---|
| 1903 | p_vci_ini_d.cmd = vci_param::CMD_STORE_COND; |
---|
| 1904 | break; |
---|
| 1905 | default: |
---|
| 1906 | assert("this should not happen"); |
---|
| 1907 | } |
---|
[45] | 1908 | p_vci_ini_d.plen = 4; |
---|
[2] | 1909 | p_vci_ini_d.trdid = TYPE_DATA_UNC; |
---|
| 1910 | p_vci_ini_d.pktid = 0; |
---|
| 1911 | p_vci_ini_d.srcid = m_srcid_d; |
---|
| 1912 | p_vci_ini_d.cons = false; |
---|
| 1913 | p_vci_ini_d.wrap = false; |
---|
| 1914 | p_vci_ini_d.contig = true; |
---|
| 1915 | p_vci_ini_d.clen = 0; |
---|
| 1916 | p_vci_ini_d.cfixed = false; |
---|
| 1917 | p_vci_ini_d.eop = true; |
---|
| 1918 | break; |
---|
| 1919 | |
---|
| 1920 | case CMD_INS_MISS: |
---|
| 1921 | p_vci_ini_d.cmdval = true; |
---|
[45] | 1922 | p_vci_ini_d.address = r_icache_addr_save & (addr_t)m_icache_yzmask; |
---|
[2] | 1923 | p_vci_ini_d.be = 0xF; |
---|
| 1924 | p_vci_ini_d.plen = m_icache_words << 2; |
---|
| 1925 | p_vci_ini_d.cmd = vci_param::CMD_READ; |
---|
| 1926 | p_vci_ini_d.trdid = TYPE_INS_MISS; |
---|
| 1927 | p_vci_ini_d.pktid = 0; |
---|
| 1928 | p_vci_ini_d.srcid = m_srcid_d; |
---|
| 1929 | p_vci_ini_d.cons = false; |
---|
| 1930 | p_vci_ini_d.wrap = false; |
---|
| 1931 | p_vci_ini_d.contig = true; |
---|
| 1932 | p_vci_ini_d.clen = 0; |
---|
| 1933 | p_vci_ini_d.cfixed = false; |
---|
| 1934 | p_vci_ini_d.eop = true; |
---|
| 1935 | break; |
---|
| 1936 | |
---|
| 1937 | case CMD_INS_UNC: |
---|
| 1938 | p_vci_ini_d.cmdval = true; |
---|
| 1939 | p_vci_ini_d.address = r_icache_addr_save.read() & ~0x3; |
---|
| 1940 | p_vci_ini_d.be = 0xF; |
---|
| 1941 | p_vci_ini_d.plen = 4; |
---|
| 1942 | p_vci_ini_d.cmd = vci_param::CMD_READ; |
---|
| 1943 | p_vci_ini_d.trdid = TYPE_INS_UNC; |
---|
| 1944 | p_vci_ini_d.pktid = 0; |
---|
| 1945 | p_vci_ini_d.srcid = m_srcid_d; |
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| 1946 | p_vci_ini_d.cons = false; |
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| 1947 | p_vci_ini_d.wrap = false; |
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| 1948 | p_vci_ini_d.contig = true; |
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| 1949 | p_vci_ini_d.clen = 0; |
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| 1950 | p_vci_ini_d.cfixed = false; |
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| 1951 | p_vci_ini_d.eop = true; |
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| 1952 | break; |
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| 1953 | } // end switch r_cmd_fsm |
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| 1954 | |
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| 1955 | // coherence network : target port |
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| 1956 | |
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| 1957 | switch ( r_tgt_fsm.read() ) { |
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| 1958 | |
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| 1959 | case TGT_IDLE: |
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| 1960 | case TGT_UPDT_WORD: |
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| 1961 | case TGT_UPDT_DATA: |
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| 1962 | p_vci_tgt_c.cmdack = true; |
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| 1963 | p_vci_tgt_c.rspval = false; |
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| 1964 | break; |
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| 1965 | |
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| 1966 | case TGT_RSP_BROADCAST: |
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| 1967 | p_vci_tgt_c.cmdack = false; |
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| 1968 | p_vci_tgt_c.rspval = !r_tgt_icache_req.read() && !r_tgt_dcache_req.read() |
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| 1969 | && ( r_tgt_icache_rsp | r_tgt_dcache_rsp ); |
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| 1970 | p_vci_tgt_c.rsrcid = r_tgt_srcid.read(); |
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| 1971 | p_vci_tgt_c.rpktid = r_tgt_pktid.read(); |
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| 1972 | p_vci_tgt_c.rtrdid = r_tgt_trdid.read(); |
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| 1973 | p_vci_tgt_c.rdata = 0; |
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| 1974 | p_vci_tgt_c.rerror = 0; |
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| 1975 | p_vci_tgt_c.reop = true; |
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| 1976 | break; |
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| 1977 | |
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| 1978 | case TGT_RSP_ICACHE: |
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| 1979 | p_vci_tgt_c.cmdack = false; |
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| 1980 | p_vci_tgt_c.rspval = !r_tgt_icache_req.read() && r_tgt_icache_rsp.read(); |
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| 1981 | p_vci_tgt_c.rsrcid = r_tgt_srcid.read(); |
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| 1982 | p_vci_tgt_c.rpktid = r_tgt_pktid.read(); |
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| 1983 | p_vci_tgt_c.rtrdid = r_tgt_trdid.read(); |
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| 1984 | p_vci_tgt_c.rdata = 0; |
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| 1985 | p_vci_tgt_c.rerror = 0; |
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| 1986 | p_vci_tgt_c.reop = true; |
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| 1987 | break; |
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| 1988 | |
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| 1989 | case TGT_RSP_DCACHE: |
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| 1990 | p_vci_tgt_c.cmdack = false; |
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| 1991 | p_vci_tgt_c.rspval = !r_tgt_dcache_req.read() && r_tgt_dcache_rsp.read(); |
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| 1992 | p_vci_tgt_c.rsrcid = r_tgt_srcid.read(); |
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| 1993 | p_vci_tgt_c.rpktid = r_tgt_pktid.read(); |
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| 1994 | p_vci_tgt_c.rtrdid = r_tgt_trdid.read(); |
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| 1995 | p_vci_tgt_c.rdata = 0; |
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| 1996 | p_vci_tgt_c.rerror = 0; |
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| 1997 | p_vci_tgt_c.reop = true; |
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| 1998 | break; |
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| 1999 | |
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| 2000 | case TGT_REQ_BROADCAST: |
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| 2001 | case TGT_REQ_ICACHE: |
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| 2002 | case TGT_REQ_DCACHE: |
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| 2003 | p_vci_tgt_c.cmdack = false; |
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| 2004 | p_vci_tgt_c.rspval = false; |
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| 2005 | break; |
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| 2006 | |
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| 2007 | } // end switch TGT_FSM |
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| 2008 | } // end genMoore() |
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| 2009 | |
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| 2010 | }} // end namespace |
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| 2011 | |
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| 2012 | // Local Variables: |
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| 2013 | // tab-width: 4 |
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| 2014 | // c-basic-offset: 4 |
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| 2015 | // c-file-offsets:((innamespace . 0)(inline-open . 0)) |
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| 2016 | // indent-tabs-mode: nil |
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| 2017 | // End: |
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| 2018 | |
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| 2019 | // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=4:softtabstop=4 |
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| 2020 | |
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| 2021 | |
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| 2022 | |
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| 2023 | |
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