[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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[204] | 26 | #include <hal_irqmask.h> |
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[1] | 27 | |
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| 28 | //////////////////////////////// |
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| 29 | void hal_remote_sb( xptr_t xp, |
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[72] | 30 | uint8_t data ) |
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[1] | 31 | { |
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| 32 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 33 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 34 | |
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[8] | 35 | asm volatile( |
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| 36 | ".set noreorder \n" |
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[279] | 37 | "mfc0 $14, $12 \n" /* $14 <= CP0_SR */ |
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| 38 | "srl $13, $14, 1 \n" |
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| 39 | "sll $13, $13, 1 \n" /* $13 <= SR masked */ |
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| 40 | "mtc0 $13, $12 \n" /* IRQ disabled */ |
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| 41 | |
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| 42 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 43 | "mtc2 %2, $24 \n" /* PADDR_EXT <= cxy */ |
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| 44 | "sb %0, 0(%1) \n" /* *paddr <= value */ |
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| 45 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 46 | |
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| 47 | "mtc0 $14, $12 \n" /* SR restored */ |
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| 48 | |
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[8] | 49 | "sync \n" |
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| 50 | ".set reorder \n" |
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[279] | 51 | : : "r" (data), "r" (ptr), "r" (cxy) : "$13", "$14", "$15" ); |
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[1] | 52 | } |
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| 53 | |
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| 54 | ///////////////////////////////// |
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| 55 | void hal_remote_sw( xptr_t xp, |
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| 56 | uint32_t data ) |
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| 57 | { |
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| 58 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 59 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 60 | |
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[296] | 61 | asm volatile( |
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| 62 | ".set noreorder \n" |
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| 63 | "mfc0 $14, $12 \n" /* $14 <= CP0_SR */ |
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| 64 | "srl $13, $14, 1 \n" |
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| 65 | "sll $13, $13, 1 \n" /* $13 <= SR masked */ |
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| 66 | "mtc0 $13, $12 \n" /* IRQ disabled */ |
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[121] | 67 | |
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[296] | 68 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 69 | "mtc2 %2, $24 \n" /* PADDR_EXT <= cxy */ |
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| 70 | "sw %0, 0(%1) \n" /* *paddr <= value */ |
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| 71 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 72 | |
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| 73 | "mtc0 $14, $12 \n" /* SR restored */ |
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| 74 | |
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[8] | 75 | "sync \n" |
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| 76 | ".set reorder \n" |
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[296] | 77 | : : "r" (data), "r" (ptr), "r" (cxy) : "$13", "$14", "$15" ); |
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[1] | 78 | } |
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| 79 | |
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| 80 | ////////////////////////////////// |
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| 81 | void hal_remote_swd( xptr_t xp, |
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| 82 | uint64_t data ) |
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| 83 | { |
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| 84 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 85 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 86 | |
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| 87 | uint32_t data_lsb = (uint32_t)data; |
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| 88 | uint32_t data_msb = (uint32_t)(data>>32); |
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| 89 | |
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[8] | 90 | asm volatile( |
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| 91 | ".set noreorder \n" |
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[296] | 92 | "mfc0 $14, $12 \n" /* $14 <= CP0_SR */ |
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| 93 | "srl $13, $14, 1 \n" |
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| 94 | "sll $13, $13, 1 \n" /* $13 <= SR masked */ |
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| 95 | "mtc0 $13, $12 \n" /* IRQ disabled */ |
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| 96 | |
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| 97 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 98 | "mtc2 %3, $24 \n" /* PADDR_EXT <= cxy */ |
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| 99 | "sw %0, 0(%2) \n" /* *paddr <= lsb */ |
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| 100 | "sw %1, 4(%2) \n" /* *(paddr+4) <= msb */ |
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| 101 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 102 | |
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| 103 | "mtc0 $14, $12 \n" /* SR restored */ |
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| 104 | |
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[8] | 105 | "sync \n" |
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| 106 | ".set reorder \n" |
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[296] | 107 | : : "r" (data_lsb), "r" (data_msb), "r" (ptr), "r" (cxy) : "$13", "$14", "$15" ); |
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[1] | 108 | } |
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| 109 | |
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| 110 | //////////////////////////////////// |
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| 111 | void hal_remote_spt( xptr_t xp, |
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| 112 | void * pt ) |
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| 113 | { |
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| 114 | hal_remote_sw ( xp , (uint32_t)pt ); |
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| 115 | } |
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| 116 | |
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| 117 | //////////////////////////////// |
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[72] | 118 | uint8_t hal_remote_lb( xptr_t xp ) |
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[1] | 119 | { |
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| 120 | char data; |
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| 121 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 122 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 123 | |
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[8] | 124 | asm volatile( |
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| 125 | ".set noreorder \n" |
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[296] | 126 | "mfc0 $14, $12 \n" /* $14 <= CP0_SR */ |
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| 127 | "srl $13, $14, 1 \n" |
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| 128 | "sll $13, $13, 1 \n" /* $13 <= SR masked */ |
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| 129 | "mtc0 $13, $12 \n" /* IRQ disabled */ |
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| 130 | |
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[8] | 131 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 132 | "mtc2 %2, $24 \n" /* PADDR_EXT <= cxy */ |
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| 133 | "lb %0, 0(%1) \n" /* data <= *paddr */ |
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| 134 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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[296] | 135 | |
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| 136 | "mtc0 $14, $12 \n" /* SR restored */ |
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[8] | 137 | ".set reorder \n" |
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[296] | 138 | : "=r" (data) : "r" (ptr), "r" (cxy) : "$13", "$14", "$15" ); |
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[1] | 139 | |
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| 140 | return ( data ); |
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| 141 | } |
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| 142 | |
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| 143 | //////////////////////////////////// |
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| 144 | uint32_t hal_remote_lw( xptr_t xp ) |
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| 145 | { |
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| 146 | uint32_t data; |
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| 147 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 148 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 149 | |
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[8] | 150 | asm volatile( |
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| 151 | ".set noreorder \n" |
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[296] | 152 | "mfc0 $14, $12 \n" /* $14 <= CP0_SR */ |
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| 153 | "srl $13, $14, 1 \n" |
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| 154 | "sll $13, $13, 1 \n" /* $13 <= SR masked */ |
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| 155 | "mtc0 $13, $12 \n" /* IRQ disabled */ |
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| 156 | |
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[8] | 157 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 158 | "mtc2 %2, $24 \n" /* PADDR_EXT <= cxy */ |
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| 159 | "lw %0, 0(%1) \n" /* data <= *paddr */ |
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| 160 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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[296] | 161 | |
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| 162 | "mtc0 $14, $12 \n" /* SR restored */ |
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[8] | 163 | ".set reorder \n" |
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[296] | 164 | : "=r" (data) : "r" (ptr), "r" (cxy) : "$13", "$14", "$15" ); |
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[1] | 165 | |
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| 166 | return ( data ); |
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| 167 | } |
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| 168 | |
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| 169 | ///////////////////////////////////// |
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| 170 | uint64_t hal_remote_lwd( xptr_t xp ) |
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| 171 | { |
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| 172 | uint32_t data_lsb; |
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| 173 | uint32_t data_msb; |
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| 174 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 175 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 176 | |
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[8] | 177 | asm volatile( |
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| 178 | ".set noreorder \n" |
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[296] | 179 | "mfc0 $14, $12 \n" /* $14 <= CP0_SR */ |
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| 180 | "srl $13, $14, 1 \n" |
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| 181 | "sll $13, $13, 1 \n" /* $13 <= SR masked */ |
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| 182 | "mtc0 $13, $12 \n" /* IRQ disabled */ |
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| 183 | |
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[8] | 184 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 185 | "mtc2 %3, $24 \n" /* PADDR_EXT <= cxy */ |
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| 186 | "lw %0, 0(%2) \n" /* data_lsb <= *paddr */ |
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| 187 | "lw %1, 4(%2) \n" /* data_msb <= *paddr+4 */ |
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| 188 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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[296] | 189 | |
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| 190 | "mtc0 $14, $12 \n" /* SR restored */ |
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[8] | 191 | ".set reorder \n" |
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[296] | 192 | : "=r" (data_lsb), "=r"(data_msb) : "r" (ptr), "r" (cxy) : "$13", "$14", "$15" ); |
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[1] | 193 | |
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| 194 | return ( (((uint64_t)data_msb)<<32) + (((uint64_t)data_lsb)) ); |
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[121] | 195 | |
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[1] | 196 | } |
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| 197 | |
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| 198 | //////////////////////////////////// |
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[92] | 199 | void * hal_remote_lpt( xptr_t xp ) |
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[1] | 200 | { |
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| 201 | return (void *)hal_remote_lw ( xp ); |
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| 202 | } |
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| 203 | |
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| 204 | /////////////////////////////////////////// |
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| 205 | bool_t hal_remote_atomic_cas( xptr_t xp, |
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| 206 | uint32_t old, |
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| 207 | uint32_t new ) |
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| 208 | { |
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[121] | 209 | uint32_t save_sr; |
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[1] | 210 | bool_t isAtomic; |
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| 211 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 212 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 213 | |
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[121] | 214 | hal_disable_irq( &save_sr ); |
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| 215 | |
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[8] | 216 | asm volatile( |
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| 217 | ".set noreorder \n" |
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| 218 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 219 | "mtc2 %4, $24 \n" /* PADDR_EXT <= cxy */ |
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| 220 | "or $8, $0, %3 \n" /* $8 <= new */ |
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| 221 | "ll $3, 0(%1) \n" /* $3 <= *paddr */ |
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| 222 | "bne $3, %2, 1f \n" /* if ($3 != old) */ |
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| 223 | "li $7, 0 \n" /* $7 <= 0 */ |
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| 224 | "sc $8, (%1) \n" /* *paddr <= new */ |
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| 225 | "or $7, $8, $0 \n" /* $7 <= atomic */ |
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| 226 | "sync \n" |
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| 227 | "1: \n" |
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| 228 | "or %0, $7, $0 \n" /* isAtomic <= $7 */ |
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| 229 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 230 | ".set reorder \n" |
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| 231 | : "=&r" (isAtomic) : "r" (ptr), "r" (old) , "r" (new), "r" (cxy) |
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| 232 | : "$3", "$7", "$8", "$15" ); |
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[1] | 233 | |
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[121] | 234 | hal_restore_irq( save_sr ); |
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| 235 | |
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[1] | 236 | return isAtomic; |
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| 237 | |
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[121] | 238 | } // end hal_remote_atomic_cas() |
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| 239 | |
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[1] | 240 | //////////////////////////////////////////// |
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| 241 | uint32_t hal_remote_atomic_add( xptr_t xp, |
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| 242 | uint32_t incr ) |
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| 243 | { |
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[121] | 244 | uint32_t save_sr; |
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[1] | 245 | uint32_t current; |
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| 246 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 247 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 248 | |
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[121] | 249 | hal_disable_irq( &save_sr ); |
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| 250 | |
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[8] | 251 | asm volatile( |
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| 252 | ".set noreorder \n" |
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| 253 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 254 | "mtc2 %3, $24 \n" /* PADDR_EXT <= cxy */ |
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| 255 | "1: \n" |
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| 256 | "ll %0, (%1) \n" /* current <= *paddr */ |
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| 257 | "addu $3, %0, %2 \n" /* $3 <= current + incr */ |
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| 258 | "sc $3, (%1) \n" /* *paddr <= $3 */ |
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| 259 | "beq $3, $0, 1b \n" /* retry if failure */ |
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| 260 | "nop \n" |
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| 261 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 262 | ".set reorder \n" |
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| 263 | : "=&r" (current) : "r" (ptr), "r" (incr), "r" (cxy) : "$3", "$15" ); |
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[1] | 264 | |
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[121] | 265 | hal_restore_irq( save_sr ); |
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| 266 | |
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[1] | 267 | return current; |
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| 268 | |
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[121] | 269 | } // end hal_remote_atomic_add() |
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| 270 | |
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[1] | 271 | //////////////////////////////////////////// |
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| 272 | uint32_t hal_remote_atomic_and( xptr_t xp, |
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| 273 | uint32_t mask ) |
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| 274 | { |
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[121] | 275 | uint32_t save_sr; |
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[1] | 276 | uint32_t current; |
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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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[121] | 280 | hal_disable_irq( &save_sr ); |
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| 281 | |
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[8] | 282 | asm volatile( |
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| 283 | ".set noreorder \n" |
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| 284 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 285 | "mtc2 %3, $24 \n" /* PADDR_EXT <= cxy */ |
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| 286 | "1: \n" |
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| 287 | "ll %0, (%1) \n" /* current <= *paddr */ |
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| 288 | "and $3, %0, %2 \n" /* $3 <= current & mask */ |
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| 289 | "sc $3, (%1) \n" /* *paddr <= $3 */ |
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| 290 | "beq $3, $0, 1b \n" /* retry if failure */ |
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| 291 | "nop \n" |
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| 292 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 293 | ".set reorder \n" |
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| 294 | : "=&r" (current) : "r" (ptr), "r" (mask), "r" (cxy) : "$3", "$15" ); |
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[1] | 295 | |
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[121] | 296 | hal_restore_irq( save_sr ); |
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| 297 | |
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[1] | 298 | return current; |
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| 299 | |
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[121] | 300 | } // end hal_remote_atomic_and() |
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| 301 | |
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[1] | 302 | //////////////////////////////////////////// |
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| 303 | uint32_t hal_remote_atomic_or( xptr_t xp, |
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| 304 | uint32_t mask ) |
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| 305 | { |
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[121] | 306 | uint32_t save_sr; |
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[1] | 307 | uint32_t current; |
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| 308 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 309 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 310 | |
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[121] | 311 | hal_disable_irq( &save_sr ); |
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| 312 | |
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[8] | 313 | asm volatile( |
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| 314 | ".set noreorder \n" |
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| 315 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 316 | "mtc2 %3, $24 \n" /* PADDR_EXT <= cxy */ |
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| 317 | "1: \n" |
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| 318 | "ll %0, (%1) \n" /* current <= *paddr */ |
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| 319 | "or $3, %0, %2 \n" /* $3 <= current | mask */ |
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| 320 | "sc $3, (%1) \n" /* *paddr <= $3 */ |
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| 321 | "beq $3, $0, 1b \n" /* retry if failure */ |
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| 322 | "nop \n" |
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| 323 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 324 | ".set reorder \n" |
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| 325 | : "=&r" (current) : "r" (ptr), "r" (mask), "r" (cxy) : "$3", "$15" ); |
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[1] | 326 | |
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[121] | 327 | hal_restore_irq( save_sr ); |
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| 328 | |
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[1] | 329 | return current; |
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| 330 | |
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[121] | 331 | } // end hal_remote_atomic_or() |
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| 332 | |
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[1] | 333 | ///////////////////////////////////////////////// |
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| 334 | error_t hal_remote_atomic_try_add( xptr_t xp, |
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| 335 | uint32_t incr, |
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| 336 | uint32_t * old ) |
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| 337 | { |
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[121] | 338 | uint32_t save_sr; |
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[1] | 339 | uint32_t current; |
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| 340 | error_t error; |
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| 341 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 342 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 343 | |
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[121] | 344 | hal_disable_irq( &save_sr ); |
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| 345 | |
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[8] | 346 | asm volatile( |
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| 347 | ".set noreorder \n" |
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| 348 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 349 | "mtc2 %4, $24 \n" /* PADDR_EXT <= cxy */ |
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| 350 | "ll %0, (%2) \n" /* current <= *paddr */ |
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| 351 | "addu $3, %0, %3 \n" /* $3 <= current + incr */ |
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| 352 | "sc $3, (%2) \n" /* *paddr <= $3 */ |
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| 353 | "beq $3, $0, 1f \n" /* exit if failure */ |
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[121] | 354 | "ori %1, $0, 1 \n" /* fail: ret <= 1 */ |
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| 355 | "and %1, $0, $0 \n" /* success: ret <= 0 */ |
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[8] | 356 | "1: \n" |
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| 357 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 358 | ".set reorder \n" |
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| 359 | : "=&r" (current), "=&r" (error) : "r" (ptr), "r" (incr), "r" (cxy) : "$3", "$15" ); |
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[1] | 360 | |
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[121] | 361 | hal_restore_irq( save_sr ); |
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| 362 | |
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[1] | 363 | *old = current; |
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| 364 | |
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| 365 | return error; |
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| 366 | |
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[121] | 367 | } // end hal_remote_atomic_try_add() |
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| 368 | |
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[1] | 369 | ///////////////////////////////////// |
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| 370 | void hal_remote_memcpy( xptr_t dst, |
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| 371 | xptr_t src, |
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| 372 | uint32_t size ) |
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| 373 | { |
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[121] | 374 | uint32_t save_sr; |
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[1] | 375 | uint32_t i; |
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| 376 | uint32_t wsize; |
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| 377 | uint32_t dptr = (uint32_t)GET_PTR( dst ); |
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| 378 | uint32_t dcxy = (uint32_t)GET_CXY( dst ); |
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| 379 | uint32_t sptr = (uint32_t)GET_PTR( src ); |
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| 380 | uint32_t scxy = (uint32_t)GET_CXY( src ); |
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| 381 | |
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[121] | 382 | hal_disable_irq( &save_sr ); |
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| 383 | |
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[1] | 384 | if( (dptr & 0x3) || (sptr & 0x3) ) wsize = 0; // do it all in bytes |
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| 385 | else wsize = size >> 2; |
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| 386 | |
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| 387 | for( i = 0 ; i < wsize ; i++ ) // transfer one word per iteration |
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| 388 | { |
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[8] | 389 | asm volatile( |
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| 390 | ".set noreorder \n" |
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| 391 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 392 | "mtc2 %0, $24 \n" /* PADDR_EXT <= scxy */ |
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| 393 | "lw $3, 0(%1) \n" /* $3 <= *src */ |
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| 394 | "mtc2 %2, $24 \n" /* PADDR_EXT <= dcxy */ |
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| 395 | "sw $3, 0(%3) \n" /* *dst <= $3 */ |
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| 396 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 397 | ".set reorder \n" |
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| 398 | : : "r"(scxy), "r" (sptr+(i<<2)), "r"(dcxy), "r" (dptr+(i<<2)) : "$3", "$15" ); |
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[1] | 399 | } |
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| 400 | |
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| 401 | for( i = wsize << 2 ; i < size ; i++ ) // transfer one byte per iteration |
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| 402 | { |
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[8] | 403 | asm volatile( |
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| 404 | ".set noreorder \n" |
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| 405 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 406 | "mtc2 %0, $24 \n" /* PADDR_EXT <= scxy */ |
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| 407 | "lb $3, 0(%1) \n" /* $3 <= *src */ |
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| 408 | "mtc2 %2, $24 \n" /* PADDR_EXT <= dcxy */ |
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| 409 | "sb $3, 0(%3) \n" /* *dst <= $3 */ |
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| 410 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 411 | ".set reorder \n" |
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| 412 | : : "r"(scxy), "r" (sptr+i), "r"(dcxy), "r" (dptr+i) : "$3", "$15" ); |
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[1] | 413 | } |
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| 414 | |
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[121] | 415 | hal_restore_irq( save_sr ); |
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[1] | 416 | |
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[121] | 417 | } // end hal_remote_memcpy() |
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| 418 | |
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| 419 | /////////////////////////////////// |
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| 420 | void hal_remote_strcpy( xptr_t dst, |
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| 421 | xptr_t src ) |
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| 422 | { |
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| 423 | uint32_t save_sr; |
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| 424 | uint32_t dptr = (uint32_t)GET_PTR( dst ); |
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| 425 | uint32_t dcxy = (uint32_t)GET_CXY( dst ); |
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| 426 | uint32_t sptr = (uint32_t)GET_PTR( src ); |
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| 427 | uint32_t scxy = (uint32_t)GET_CXY( src ); |
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| 428 | |
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| 429 | hal_disable_irq( &save_sr ); |
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| 430 | |
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| 431 | // loop on characters while non NUL |
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| 432 | asm volatile( |
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| 433 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 434 | "1: \n" /* loop entry */ |
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| 435 | "mtc2 %0, $24 \n" /* PADDR_EXT <= scxy */ |
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| 436 | "lb $13, 0(%1) \n" /* read char from src string */ |
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| 437 | "mtc2 %2, $24 \n" /* PADDR_EXT <= dcxy */ |
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| 438 | "sb $13, 0(%3) \n" /* store char to dst string */ |
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| 439 | "addi %1, %1, 1 \n" /* increment sptr pointer */ |
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| 440 | "addi %3, %3, 1 \n" /* increment dptr pointer */ |
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| 441 | "bne $13, $0, 1b \n" /* test NUL */ |
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| 442 | "nop \n" |
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| 443 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 444 | : : "r"(scxy), "r"(sptr), "r"(dcxy), "r"(dptr) : "$13","$15", "memory" ); |
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| 445 | |
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| 446 | hal_restore_irq( save_sr ); |
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| 447 | |
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| 448 | } // end hal_remote_strcpy() |
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[313] | 449 | |
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| 450 | //////////////////////////////////////// |
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| 451 | void hal_remote_memset( xptr_t buf_xp, |
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| 452 | uint8_t byte, |
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| 453 | uint32_t size ) |
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| 454 | { |
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| 455 | uint32_t save_sr; |
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| 456 | uint32_t i; |
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| 457 | uint32_t wsize; |
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| 458 | uint32_t buf_ptr = (uint32_t)GET_PTR( buf_xp ); |
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| 459 | uint32_t buf_cxy = (uint32_t)GET_CXY( buf_xp ); |
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| 460 | uint32_t word = ((uint32_t)byte)<<24 | |
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| 461 | ((uint32_t)byte)<<16 | |
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| 462 | ((uint32_t)byte)<<8 | |
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| 463 | ((uint32_t)byte) ; |
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| 464 | |
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| 465 | hal_disable_irq( &save_sr ); |
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| 466 | |
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| 467 | if( (buf_ptr & 0x3) ) wsize = 0; // do it all in bytes |
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| 468 | else wsize = size >> 2; |
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| 469 | |
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| 470 | for( i = 0 ; i < wsize ; i++ ) // transfer one word per iteration |
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| 471 | { |
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| 472 | asm volatile( |
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| 473 | ".set noreorder \n" |
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| 474 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 475 | "mtc2 %0, $24 \n" /* PADDR_EXT <= buf_cxy */ |
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| 476 | "sw %2, 0(%1) \n" /* set one word */ |
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| 477 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 478 | ".set reorder \n" |
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| 479 | : : "r"(buf_cxy), "r" (buf_ptr+(i<<2)), "r"(byte) : "$15" ); |
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| 480 | } |
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| 481 | |
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| 482 | for( i = wsize << 2 ; i < size ; i++ ) // transfer one byte per iteration |
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| 483 | { |
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| 484 | asm volatile( |
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| 485 | ".set noreorder \n" |
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| 486 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 487 | "mtc2 %0, $24 \n" /* PADDR_EXT <= buf_cxy */ |
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| 488 | "sb %2, 0(%1) \n" /* set one byte */ |
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| 489 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 490 | ".set reorder \n" |
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| 491 | : : "r"(buf_cxy), "r"(buf_ptr+i), "r"(word) : "$15" ); |
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| 492 | } |
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| 493 | |
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| 494 | hal_restore_irq( save_sr ); |
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| 495 | |
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| 496 | } // end hal_remote_memset() |
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| 497 | |
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