| [1] | 1 | /* |
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| 2 | * hal_remote.c - implementation of Generic Remote Access API for TSAR-MIPS32 |
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| 3 | * |
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| 4 | * Authors : Mohammed Karaoui (2015) |
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| 5 | * Alain Greiner (2016) |
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| 6 | * |
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| 7 | * Copyright (c) UPMC Sorbonne Universites |
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| 8 | * |
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| 9 | * This file is part of ALMOS-MKH.. |
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| 10 | * |
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| 11 | * ALMOS-MKH. is free software; you can redistribute it and/or modify it |
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| 12 | * under the terms of the GNU General Public License as published by |
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| 13 | * the Free Software Foundation; version 2.0 of the License. |
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| 14 | * |
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| 15 | * ALMOS-MKH. is distributed in the hope that it will be useful, but |
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| 16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 18 | * General Public License for more details. |
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| 19 | * |
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| 20 | * You should have received a copy of the GNU General Public License |
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| 21 | * along with ALMOS-MKH.; if not, write to the Free Software Foundation, |
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| 22 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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| 23 | */ |
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| 24 | |
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| 25 | #include <hal_types.h> |
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| 26 | |
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| 27 | //////////////////////////////// |
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| 28 | void hal_remote_sb( xptr_t xp, |
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| 29 | char data ) |
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| 30 | { |
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| 31 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 32 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 33 | |
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| 34 | asm volatile( "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 35 | "mtc2 %2, $24 \n" /* PADDR_EXT <= cxy */ |
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| 36 | "sb %0, 0(%1) \n" /* *paddr <= value */ |
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| 37 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 38 | "sync \n" |
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| 39 | : |
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| 40 | : "r" (data), "r" (ptr), "r" (cxy) |
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| 41 | : "$15" ); |
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| 42 | } |
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| 43 | |
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| 44 | ///////////////////////////////// |
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| 45 | void hal_remote_sw( xptr_t xp, |
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| 46 | uint32_t data ) |
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| 47 | { |
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| 48 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 49 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 50 | |
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| 51 | asm volatile( "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 52 | "mtc2 %2, $24 \n" /* PADDR_EXT <= cxy */ |
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| 53 | "sw %0, 0(%1) \n" /* *paddr <= value */ |
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| 54 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 55 | "sync \n" |
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| 56 | : |
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| 57 | : "r" (data), "r" (ptr), "r" (cxy) |
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| 58 | : "$15" ); |
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| 59 | } |
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| 60 | |
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| 61 | ////////////////////////////////// |
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| 62 | void hal_remote_swd( xptr_t xp, |
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| 63 | uint64_t data ) |
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| 64 | { |
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| 65 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 66 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 67 | |
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| 68 | uint32_t data_lsb = (uint32_t)data; |
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| 69 | uint32_t data_msb = (uint32_t)(data>>32); |
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| 70 | |
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| 71 | asm volatile( "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 72 | "mtc2 %3, $24 \n" /* PADDR_EXT <= cxy */ |
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| 73 | "sw %0, 0(%2) \n" /* *paddr <= lsb */ |
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| 74 | "sw %1, 4(%2) \n" /* *(paddr+4) <= msb */ |
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| 75 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 76 | "sync \n" |
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| 77 | : |
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| 78 | : "r" (data_lsb), "r" (data_msb), "r" (ptr), "r" (cxy) |
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| 79 | : "$15" ); |
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| 80 | } |
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| 81 | |
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| 82 | //////////////////////////////////// |
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| 83 | void hal_remote_spt( xptr_t xp, |
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| 84 | void * pt ) |
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| 85 | { |
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| 86 | hal_remote_sw ( xp , (uint32_t)pt ); |
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| 87 | } |
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| 88 | |
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| 89 | //////////////////////////////// |
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| 90 | char hal_remote_lb( xptr_t xp ) |
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| 91 | { |
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| 92 | char data; |
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| 93 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 94 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 95 | |
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| 96 | asm volatile( "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 97 | "mtc2 %2, $24 \n" /* PADDR_EXT <= cxy */ |
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| 98 | "lb %0, 0(%1) \n" /* data <= *paddr */ |
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| 99 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 100 | : "=r" (data) |
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| 101 | : "r" (ptr), "r" (cxy) |
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| 102 | : "$15" ); |
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| 103 | |
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| 104 | return ( data ); |
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| 105 | } |
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| 106 | |
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| 107 | //////////////////////////////////// |
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| 108 | uint32_t hal_remote_lw( xptr_t xp ) |
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| 109 | { |
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| 110 | uint32_t data; |
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| 111 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 112 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 113 | |
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| 114 | asm volatile( "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 115 | "mtc2 %2, $24 \n" /* PADDR_EXT <= cxy */ |
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| 116 | "lw %0, 0(%1) \n" /* data <= *paddr */ |
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| 117 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 118 | : "=r" (data) |
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| 119 | : "r" (ptr), "r" (cxy) |
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| 120 | : "$15" ); |
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| 121 | |
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| 122 | return ( data ); |
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| 123 | } |
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| 124 | |
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| 125 | ///////////////////////////////////// |
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| 126 | uint64_t hal_remote_lwd( xptr_t xp ) |
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| 127 | { |
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| 128 | uint32_t data_lsb; |
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| 129 | uint32_t data_msb; |
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| 130 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 131 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 132 | |
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| 133 | asm volatile( "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 134 | "mtc2 %3, $24 \n" /* PADDR_EXT <= cxy */ |
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| 135 | "lw %0, 0(%2) \n" /* data_lsb <= *paddr */ |
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| 136 | "lw %1, 4(%2) \n" /* data_msb <= *paddr+4 */ |
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| 137 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 138 | : "=r" (data_lsb), "=r"(data_msb) |
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| 139 | : "r" (ptr), "r" (cxy) |
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| 140 | : "$15" ); |
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| 141 | |
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| 142 | return ( (((uint64_t)data_msb)<<32) + (((uint64_t)data_lsb)) ); |
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| 143 | } |
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| 144 | |
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| 145 | //////////////////////////////////// |
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| 146 | void * hal_remote_lpt( xptr_t xp, |
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| 147 | void * pt ) |
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| 148 | { |
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| 149 | return (void *)hal_remote_lw ( xp ); |
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| 150 | } |
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| 151 | |
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| 152 | //////////////////////////////////////// |
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| 153 | uint32_t hal_remote_lw_unc( xptr_t xp ) |
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| 154 | { |
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| 155 | uint32_t data; |
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| 156 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 157 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 158 | |
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| 159 | asm volatile( "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 160 | "mtc2 %2, $24 \n" /* PADDR_EXT <= cxy */ |
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| 161 | "ll %0, 0(%1) \n" /* data <= *paddr */ |
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| 162 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 163 | : "=r" (data) |
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| 164 | : "r" (ptr), "r" (cxy) |
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| 165 | : "$15" ); |
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| 166 | |
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| 167 | return ( data ); |
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| 168 | } |
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| 169 | |
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| 170 | /////////////////////////////////////////// |
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| 171 | bool_t hal_remote_atomic_cas( xptr_t xp, |
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| 172 | uint32_t old, |
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| 173 | uint32_t new ) |
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| 174 | { |
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| 175 | bool_t isAtomic; |
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| 176 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 177 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 178 | |
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| 179 | asm volatile( "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 180 | "mtc2 %3, $24 \n" /* PADDR_EXT <= cxy */ |
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| 181 | "or $8, $0, %3 \n" /* $8 <= new */ |
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| 182 | "ll $3, 0(%1) \n" /* $3 <= *paddr */ |
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| 183 | "bne $3, %2, 1f \n" /* if (new != old) */ |
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| 184 | "li $7, 0 \n" /* $7 <= 0 */ |
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| 185 | "sc $8, (%1) \n" /* *paddr <= new */ |
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| 186 | "or $7, $8, $0 \n" /* $7 <= new */ |
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| 187 | "sync \n" |
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| 188 | "1: \n" |
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| 189 | "or %0, $7, $0 \n" /* isAtomic <= $7 */ |
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| 190 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 191 | : "=&r" (isAtomic) |
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| 192 | : "r" (ptr), "r" (old) , "r" (new), "r" (cxy) |
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| 193 | : "$3", "$7", "$8", "$15" ); |
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| 194 | |
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| 195 | return isAtomic; |
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| 196 | } |
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| 197 | |
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| 198 | //////////////////////////////////////////// |
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| 199 | uint32_t hal_remote_atomic_add( xptr_t xp, |
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| 200 | uint32_t incr ) |
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| 201 | { |
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| 202 | uint32_t current; |
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| 203 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 204 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 205 | |
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| 206 | asm volatile( "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 207 | "mtc2 %3, $24 \n" /* PADDR_EXT <= cxy */ |
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| 208 | "1: \n" |
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| 209 | "ll %0, (%1) \n" /* current <= *paddr */ |
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| 210 | "addu $3, %0, %2 \n" /* $3 <= current + incr */ |
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| 211 | "sc $3, (%1) \n" /* *paddr <= $3 */ |
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| 212 | "beq $3, $0, 1b \n" /* retry if failure */ |
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| 213 | "nop \n" |
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| 214 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 215 | : "=&r" (current) |
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| 216 | : "r" (ptr), "r" (incr), "r" (cxy) |
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| 217 | : "$3", "$15" ); |
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| 218 | |
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| 219 | return current; |
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| 220 | } |
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| 221 | |
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| 222 | //////////////////////////////////////////// |
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| 223 | uint32_t hal_remote_atomic_and( xptr_t xp, |
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| 224 | uint32_t mask ) |
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| 225 | { |
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| 226 | uint32_t current; |
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| 227 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 228 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 229 | |
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| 230 | asm volatile( "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 231 | "mtc2 %3, $24 \n" /* PADDR_EXT <= cxy */ |
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| 232 | "1: \n" |
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| 233 | "ll %0, (%1) \n" /* current <= *paddr */ |
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| 234 | "and $3, %0, %2 \n" /* $3 <= current & mask */ |
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| 235 | "sc $3, (%1) \n" /* *paddr <= $3 */ |
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| 236 | "beq $3, $0, 1b \n" /* retry if failure */ |
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| 237 | "nop \n" |
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| 238 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 239 | : "=&r" (current) |
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| 240 | : "r" (ptr), "r" (mask), "r" (cxy) |
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| 241 | : "$3", "$15" ); |
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| 242 | |
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| 243 | return current; |
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| 244 | } |
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| 245 | |
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| 246 | //////////////////////////////////////////// |
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| 247 | uint32_t hal_remote_atomic_or( xptr_t xp, |
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| 248 | uint32_t mask ) |
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| 249 | { |
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| 250 | uint32_t current; |
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| 251 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 252 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 253 | |
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| 254 | asm volatile( "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 255 | "mtc2 %3, $24 \n" /* PADDR_EXT <= cxy */ |
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| 256 | "1: \n" |
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| 257 | "ll %0, (%1) \n" /* current <= *paddr */ |
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| 258 | "or $3, %0, %2 \n" /* $3 <= current | mask */ |
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| 259 | "sc $3, (%1) \n" /* *paddr <= $3 */ |
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| 260 | "beq $3, $0, 1b \n" /* retry if failure */ |
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| 261 | "nop \n" |
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| 262 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 263 | : "=&r" (current) |
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| 264 | : "r" (ptr), "r" (mask), "r" (cxy) |
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| 265 | : "$3", "$15" ); |
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| 266 | |
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| 267 | return current; |
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| 268 | } |
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| 269 | |
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| 270 | ///////////////////////////////////////////////// |
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| 271 | error_t hal_remote_atomic_try_add( xptr_t xp, |
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| 272 | uint32_t incr, |
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| 273 | uint32_t * old ) |
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| 274 | { |
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| 275 | uint32_t current; |
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| 276 | error_t error; |
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| 277 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 278 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 279 | |
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| 280 | asm volatile( "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 281 | "mtc2 %4, $24 \n" /* PADDR_EXT <= cxy */ |
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| 282 | "ll %0, (%2) \n" /* current <= *paddr */ |
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| 283 | "addu $3, %0, %3 \n" /* $3 <= current + incr */ |
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| 284 | "sc $3, (%2) \n" /* *paddr <= $3 */ |
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| 285 | "beq $3, $0, 1f \n" /* exit if failure */ |
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| 286 | "ori %1, $0, 1 \n" /* fail: ret <= 1 */ |
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| 287 | "and %1, $0, $0 \n" /* success: ret <= 0 */ |
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| 288 | "1: \n" |
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| 289 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 290 | : "=&r" (current), "=&r" (error) |
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| 291 | : "r" (ptr), "r" (incr), "r" (cxy) |
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| 292 | : "$3", "$15" ); |
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| 293 | |
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| 294 | *old = current; |
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| 295 | |
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| 296 | return error; |
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| 297 | } |
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| 298 | |
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| 299 | ///////////////////////////////////// |
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| 300 | void hal_remote_memcpy( xptr_t dst, |
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| 301 | xptr_t src, |
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| 302 | uint32_t size ) |
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| 303 | { |
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| 304 | uint32_t i; |
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| 305 | uint32_t wsize; |
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| 306 | uint32_t dptr = (uint32_t)GET_PTR( dst ); |
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| 307 | uint32_t dcxy = (uint32_t)GET_CXY( dst ); |
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| 308 | uint32_t sptr = (uint32_t)GET_PTR( src ); |
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| 309 | uint32_t scxy = (uint32_t)GET_CXY( src ); |
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| 310 | |
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| 311 | if( (dptr & 0x3) || (sptr & 0x3) ) wsize = 0; // do it all in bytes |
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| 312 | else wsize = size >> 2; |
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| 313 | |
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| 314 | for( i = 0 ; i < wsize ; i++ ) // transfer one word per iteration |
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| 315 | { |
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| 316 | asm volatile( "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 317 | "mtc2 %0, $24 \n" /* PADDR_EXT <= scxy */ |
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| 318 | "lw $3, 0(%1) \n" /* $3 <= *src */ |
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| 319 | "mtc2 %2, $24 \n" /* PADDR_EXT <= dcxy */ |
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| 320 | "sw $3, 0(%3) \n" /* *dst <= $3 */ |
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| 321 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 322 | : |
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| 323 | : "r"(scxy), "r" (sptr+(i<<2)), "r"(dcxy), "r" (dptr+(i<<2)) |
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| 324 | : "$3", "$15" ); |
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| 325 | } |
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| 326 | |
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| 327 | for( i = wsize << 2 ; i < size ; i++ ) // transfer one byte per iteration |
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| 328 | { |
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| 329 | asm volatile( "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 330 | "mtc2 %0, $24 \n" /* PADDR_EXT <= scxy */ |
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| 331 | "lb $3, 0(%1) \n" /* $3 <= *src */ |
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| 332 | "mtc2 %2, $24 \n" /* PADDR_EXT <= dcxy */ |
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| 333 | "sb $3, 0(%3) \n" /* *dst <= $3 */ |
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| 334 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 335 | : |
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| 336 | : "r"(scxy), "r" (sptr+i), "r"(dcxy), "r" (dptr+i) |
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| 337 | : "$3", "$15" ); |
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| 338 | } |
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| 339 | } |
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| 340 | |
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| 341 | |
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