[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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[457] | 25 | #include <hal_kernel_types.h> |
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[204] | 26 | #include <hal_irqmask.h> |
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[501] | 27 | #include <hal_remote.h> |
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[1] | 28 | |
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| 29 | //////////////////////////////// |
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| 30 | void hal_remote_sb( xptr_t xp, |
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[72] | 31 | uint8_t data ) |
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[1] | 32 | { |
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| 33 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 34 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 35 | |
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[8] | 36 | asm volatile( |
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| 37 | ".set noreorder \n" |
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[279] | 38 | "mfc0 $14, $12 \n" /* $14 <= CP0_SR */ |
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| 39 | "srl $13, $14, 1 \n" |
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| 40 | "sll $13, $13, 1 \n" /* $13 <= SR masked */ |
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| 41 | "mtc0 $13, $12 \n" /* IRQ disabled */ |
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| 42 | |
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| 43 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 44 | "mtc2 %2, $24 \n" /* PADDR_EXT <= cxy */ |
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| 45 | "sb %0, 0(%1) \n" /* *paddr <= value */ |
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| 46 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 47 | |
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| 48 | "mtc0 $14, $12 \n" /* SR restored */ |
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| 49 | |
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[8] | 50 | "sync \n" |
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| 51 | ".set reorder \n" |
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[279] | 52 | : : "r" (data), "r" (ptr), "r" (cxy) : "$13", "$14", "$15" ); |
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[1] | 53 | } |
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| 54 | |
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| 55 | ///////////////////////////////// |
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[570] | 56 | void hal_remote_s32( xptr_t xp, |
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[1] | 57 | uint32_t data ) |
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| 58 | { |
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| 59 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 60 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 61 | |
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[296] | 62 | asm volatile( |
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| 63 | ".set noreorder \n" |
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| 64 | "mfc0 $14, $12 \n" /* $14 <= CP0_SR */ |
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| 65 | "srl $13, $14, 1 \n" |
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| 66 | "sll $13, $13, 1 \n" /* $13 <= SR masked */ |
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| 67 | "mtc0 $13, $12 \n" /* IRQ disabled */ |
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[121] | 68 | |
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[296] | 69 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 70 | "mtc2 %2, $24 \n" /* PADDR_EXT <= cxy */ |
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| 71 | "sw %0, 0(%1) \n" /* *paddr <= value */ |
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| 72 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 73 | |
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| 74 | "mtc0 $14, $12 \n" /* SR restored */ |
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| 75 | |
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[8] | 76 | "sync \n" |
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| 77 | ".set reorder \n" |
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[296] | 78 | : : "r" (data), "r" (ptr), "r" (cxy) : "$13", "$14", "$15" ); |
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[1] | 79 | } |
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| 80 | |
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| 81 | ////////////////////////////////// |
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[570] | 82 | void hal_remote_s64( xptr_t xp, |
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[1] | 83 | uint64_t data ) |
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| 84 | { |
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| 85 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 86 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 87 | |
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| 88 | uint32_t data_lsb = (uint32_t)data; |
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| 89 | uint32_t data_msb = (uint32_t)(data>>32); |
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| 90 | |
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[8] | 91 | asm volatile( |
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| 92 | ".set noreorder \n" |
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[296] | 93 | "mfc0 $14, $12 \n" /* $14 <= CP0_SR */ |
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| 94 | "srl $13, $14, 1 \n" |
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| 95 | "sll $13, $13, 1 \n" /* $13 <= SR masked */ |
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| 96 | "mtc0 $13, $12 \n" /* IRQ disabled */ |
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| 97 | |
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| 98 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 99 | "mtc2 %3, $24 \n" /* PADDR_EXT <= cxy */ |
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| 100 | "sw %0, 0(%2) \n" /* *paddr <= lsb */ |
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| 101 | "sw %1, 4(%2) \n" /* *(paddr+4) <= msb */ |
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| 102 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 103 | |
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| 104 | "mtc0 $14, $12 \n" /* SR restored */ |
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| 105 | |
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[8] | 106 | "sync \n" |
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| 107 | ".set reorder \n" |
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[296] | 108 | : : "r" (data_lsb), "r" (data_msb), "r" (ptr), "r" (cxy) : "$13", "$14", "$15" ); |
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[1] | 109 | } |
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| 110 | |
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| 111 | //////////////////////////////////// |
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| 112 | void hal_remote_spt( xptr_t xp, |
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| 113 | void * pt ) |
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| 114 | { |
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[570] | 115 | hal_remote_s32 ( xp , (uint32_t)pt ); |
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[1] | 116 | } |
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| 117 | |
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| 118 | //////////////////////////////// |
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[72] | 119 | uint8_t hal_remote_lb( xptr_t xp ) |
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[1] | 120 | { |
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| 121 | char data; |
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| 122 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 123 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 124 | |
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[8] | 125 | asm volatile( |
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| 126 | ".set noreorder \n" |
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[296] | 127 | "mfc0 $14, $12 \n" /* $14 <= CP0_SR */ |
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| 128 | "srl $13, $14, 1 \n" |
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| 129 | "sll $13, $13, 1 \n" /* $13 <= SR masked */ |
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| 130 | "mtc0 $13, $12 \n" /* IRQ disabled */ |
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| 131 | |
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[8] | 132 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 133 | "mtc2 %2, $24 \n" /* PADDR_EXT <= cxy */ |
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| 134 | "lb %0, 0(%1) \n" /* data <= *paddr */ |
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| 135 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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[296] | 136 | |
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| 137 | "mtc0 $14, $12 \n" /* SR restored */ |
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[8] | 138 | ".set reorder \n" |
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[296] | 139 | : "=r" (data) : "r" (ptr), "r" (cxy) : "$13", "$14", "$15" ); |
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[1] | 140 | |
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| 141 | return ( data ); |
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| 142 | } |
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| 143 | |
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| 144 | //////////////////////////////////// |
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[570] | 145 | uint32_t hal_remote_l32( xptr_t xp ) |
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[1] | 146 | { |
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| 147 | uint32_t data; |
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| 148 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 149 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 150 | |
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[8] | 151 | asm volatile( |
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| 152 | ".set noreorder \n" |
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[296] | 153 | "mfc0 $14, $12 \n" /* $14 <= CP0_SR */ |
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| 154 | "srl $13, $14, 1 \n" |
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| 155 | "sll $13, $13, 1 \n" /* $13 <= SR masked */ |
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| 156 | "mtc0 $13, $12 \n" /* IRQ disabled */ |
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| 157 | |
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[8] | 158 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 159 | "mtc2 %2, $24 \n" /* PADDR_EXT <= cxy */ |
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| 160 | "lw %0, 0(%1) \n" /* data <= *paddr */ |
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| 161 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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[296] | 162 | |
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| 163 | "mtc0 $14, $12 \n" /* SR restored */ |
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[8] | 164 | ".set reorder \n" |
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[296] | 165 | : "=r" (data) : "r" (ptr), "r" (cxy) : "$13", "$14", "$15" ); |
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[1] | 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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[570] | 171 | uint64_t hal_remote_l64( xptr_t xp ) |
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[1] | 172 | { |
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| 173 | uint32_t data_lsb; |
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| 174 | uint32_t data_msb; |
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| 175 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 176 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 177 | |
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[8] | 178 | asm volatile( |
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| 179 | ".set noreorder \n" |
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[296] | 180 | "mfc0 $14, $12 \n" /* $14 <= CP0_SR */ |
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| 181 | "srl $13, $14, 1 \n" |
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| 182 | "sll $13, $13, 1 \n" /* $13 <= SR masked */ |
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| 183 | "mtc0 $13, $12 \n" /* IRQ disabled */ |
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| 184 | |
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[8] | 185 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 186 | "mtc2 %3, $24 \n" /* PADDR_EXT <= cxy */ |
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| 187 | "lw %0, 0(%2) \n" /* data_lsb <= *paddr */ |
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| 188 | "lw %1, 4(%2) \n" /* data_msb <= *paddr+4 */ |
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| 189 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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[296] | 190 | |
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| 191 | "mtc0 $14, $12 \n" /* SR restored */ |
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[8] | 192 | ".set reorder \n" |
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[296] | 193 | : "=r" (data_lsb), "=r"(data_msb) : "r" (ptr), "r" (cxy) : "$13", "$14", "$15" ); |
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[1] | 194 | |
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| 195 | return ( (((uint64_t)data_msb)<<32) + (((uint64_t)data_lsb)) ); |
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[121] | 196 | |
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[1] | 197 | } |
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| 198 | |
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| 199 | //////////////////////////////////// |
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[92] | 200 | void * hal_remote_lpt( xptr_t xp ) |
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[1] | 201 | { |
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[570] | 202 | return (void *)hal_remote_l32 ( xp ); |
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[1] | 203 | } |
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| 204 | |
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| 205 | /////////////////////////////////////////// |
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| 206 | bool_t hal_remote_atomic_cas( xptr_t xp, |
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| 207 | uint32_t old, |
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| 208 | uint32_t new ) |
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| 209 | { |
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[121] | 210 | uint32_t save_sr; |
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[1] | 211 | bool_t isAtomic; |
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| 212 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 213 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 214 | |
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[121] | 215 | hal_disable_irq( &save_sr ); |
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| 216 | |
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[8] | 217 | asm volatile( |
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| 218 | ".set noreorder \n" |
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| 219 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 220 | "mtc2 %4, $24 \n" /* PADDR_EXT <= cxy */ |
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| 221 | "or $8, $0, %3 \n" /* $8 <= new */ |
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| 222 | "ll $3, 0(%1) \n" /* $3 <= *paddr */ |
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| 223 | "bne $3, %2, 1f \n" /* if ($3 != old) */ |
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| 224 | "li $7, 0 \n" /* $7 <= 0 */ |
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| 225 | "sc $8, (%1) \n" /* *paddr <= new */ |
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| 226 | "or $7, $8, $0 \n" /* $7 <= atomic */ |
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| 227 | "sync \n" |
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| 228 | "1: \n" |
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| 229 | "or %0, $7, $0 \n" /* isAtomic <= $7 */ |
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| 230 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 231 | ".set reorder \n" |
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| 232 | : "=&r" (isAtomic) : "r" (ptr), "r" (old) , "r" (new), "r" (cxy) |
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| 233 | : "$3", "$7", "$8", "$15" ); |
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[1] | 234 | |
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[121] | 235 | hal_restore_irq( save_sr ); |
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| 236 | |
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[1] | 237 | return isAtomic; |
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| 238 | |
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[121] | 239 | } // end hal_remote_atomic_cas() |
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| 240 | |
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[1] | 241 | //////////////////////////////////////////// |
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| 242 | uint32_t hal_remote_atomic_add( xptr_t xp, |
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| 243 | uint32_t incr ) |
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| 244 | { |
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[121] | 245 | uint32_t save_sr; |
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[1] | 246 | uint32_t current; |
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| 247 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 248 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 249 | |
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[121] | 250 | hal_disable_irq( &save_sr ); |
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| 251 | |
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[8] | 252 | asm volatile( |
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| 253 | ".set noreorder \n" |
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| 254 | "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 | "addu $3, %0, %2 \n" /* $3 <= current + incr */ |
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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 | ".set reorder \n" |
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| 264 | : "=&r" (current) : "r" (ptr), "r" (incr), "r" (cxy) : "$3", "$15" ); |
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[1] | 265 | |
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[121] | 266 | hal_restore_irq( save_sr ); |
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| 267 | |
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[1] | 268 | return current; |
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| 269 | |
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[121] | 270 | } // end hal_remote_atomic_add() |
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| 271 | |
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[1] | 272 | //////////////////////////////////////////// |
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| 273 | uint32_t hal_remote_atomic_and( xptr_t xp, |
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| 274 | uint32_t mask ) |
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| 275 | { |
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[121] | 276 | uint32_t save_sr; |
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[1] | 277 | uint32_t current; |
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| 278 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 279 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 280 | |
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[121] | 281 | hal_disable_irq( &save_sr ); |
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| 282 | |
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[8] | 283 | asm volatile( |
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| 284 | ".set noreorder \n" |
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| 285 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 286 | "mtc2 %3, $24 \n" /* PADDR_EXT <= cxy */ |
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| 287 | "1: \n" |
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| 288 | "ll %0, (%1) \n" /* current <= *paddr */ |
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| 289 | "and $3, %0, %2 \n" /* $3 <= current & mask */ |
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| 290 | "sc $3, (%1) \n" /* *paddr <= $3 */ |
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| 291 | "beq $3, $0, 1b \n" /* retry if failure */ |
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| 292 | "nop \n" |
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| 293 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 294 | ".set reorder \n" |
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| 295 | : "=&r" (current) : "r" (ptr), "r" (mask), "r" (cxy) : "$3", "$15" ); |
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[1] | 296 | |
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[121] | 297 | hal_restore_irq( save_sr ); |
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| 298 | |
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[1] | 299 | return current; |
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| 300 | |
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[121] | 301 | } // end hal_remote_atomic_and() |
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| 302 | |
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[1] | 303 | //////////////////////////////////////////// |
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| 304 | uint32_t hal_remote_atomic_or( xptr_t xp, |
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| 305 | uint32_t mask ) |
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| 306 | { |
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[121] | 307 | uint32_t save_sr; |
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[1] | 308 | uint32_t current; |
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| 309 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 310 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 311 | |
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[121] | 312 | hal_disable_irq( &save_sr ); |
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| 313 | |
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[8] | 314 | asm volatile( |
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| 315 | ".set noreorder \n" |
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| 316 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 317 | "mtc2 %3, $24 \n" /* PADDR_EXT <= cxy */ |
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| 318 | "1: \n" |
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| 319 | "ll %0, (%1) \n" /* current <= *paddr */ |
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| 320 | "or $3, %0, %2 \n" /* $3 <= current | mask */ |
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| 321 | "sc $3, (%1) \n" /* *paddr <= $3 */ |
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| 322 | "beq $3, $0, 1b \n" /* retry if failure */ |
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| 323 | "nop \n" |
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| 324 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 325 | ".set reorder \n" |
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| 326 | : "=&r" (current) : "r" (ptr), "r" (mask), "r" (cxy) : "$3", "$15" ); |
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[1] | 327 | |
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[121] | 328 | hal_restore_irq( save_sr ); |
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| 329 | |
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[1] | 330 | return current; |
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| 331 | |
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[121] | 332 | } // end hal_remote_atomic_or() |
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| 333 | |
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[1] | 334 | ///////////////////////////////////////////////// |
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| 335 | error_t hal_remote_atomic_try_add( xptr_t xp, |
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| 336 | uint32_t incr, |
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| 337 | uint32_t * old ) |
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| 338 | { |
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[121] | 339 | uint32_t save_sr; |
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[1] | 340 | uint32_t current; |
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| 341 | error_t error; |
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| 342 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 343 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 344 | |
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[121] | 345 | hal_disable_irq( &save_sr ); |
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| 346 | |
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[8] | 347 | asm volatile( |
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| 348 | ".set noreorder \n" |
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| 349 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 350 | "mtc2 %4, $24 \n" /* PADDR_EXT <= cxy */ |
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| 351 | "ll %0, (%2) \n" /* current <= *paddr */ |
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| 352 | "addu $3, %0, %3 \n" /* $3 <= current + incr */ |
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| 353 | "sc $3, (%2) \n" /* *paddr <= $3 */ |
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| 354 | "beq $3, $0, 1f \n" /* exit if failure */ |
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[121] | 355 | "ori %1, $0, 1 \n" /* fail: ret <= 1 */ |
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| 356 | "and %1, $0, $0 \n" /* success: ret <= 0 */ |
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[8] | 357 | "1: \n" |
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| 358 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 359 | ".set reorder \n" |
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| 360 | : "=&r" (current), "=&r" (error) : "r" (ptr), "r" (incr), "r" (cxy) : "$3", "$15" ); |
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[1] | 361 | |
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[121] | 362 | hal_restore_irq( save_sr ); |
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| 363 | |
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[1] | 364 | *old = current; |
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| 365 | |
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| 366 | return error; |
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| 367 | |
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[121] | 368 | } // end hal_remote_atomic_try_add() |
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| 369 | |
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[1] | 370 | ///////////////////////////////////// |
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| 371 | void hal_remote_memcpy( xptr_t dst, |
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| 372 | xptr_t src, |
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| 373 | uint32_t size ) |
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| 374 | { |
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[121] | 375 | uint32_t save_sr; |
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[1] | 376 | uint32_t i; |
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| 377 | uint32_t wsize; |
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| 378 | uint32_t dptr = (uint32_t)GET_PTR( dst ); |
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| 379 | uint32_t dcxy = (uint32_t)GET_CXY( dst ); |
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| 380 | uint32_t sptr = (uint32_t)GET_PTR( src ); |
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| 381 | uint32_t scxy = (uint32_t)GET_CXY( src ); |
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| 382 | |
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[121] | 383 | hal_disable_irq( &save_sr ); |
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| 384 | |
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[1] | 385 | if( (dptr & 0x3) || (sptr & 0x3) ) wsize = 0; // do it all in bytes |
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| 386 | else wsize = size >> 2; |
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| 387 | |
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| 388 | for( i = 0 ; i < wsize ; i++ ) // transfer one word per iteration |
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| 389 | { |
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[8] | 390 | asm volatile( |
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| 391 | ".set noreorder \n" |
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| 392 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 393 | "mtc2 %0, $24 \n" /* PADDR_EXT <= scxy */ |
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| 394 | "lw $3, 0(%1) \n" /* $3 <= *src */ |
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| 395 | "mtc2 %2, $24 \n" /* PADDR_EXT <= dcxy */ |
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| 396 | "sw $3, 0(%3) \n" /* *dst <= $3 */ |
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| 397 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 398 | ".set reorder \n" |
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| 399 | : : "r"(scxy), "r" (sptr+(i<<2)), "r"(dcxy), "r" (dptr+(i<<2)) : "$3", "$15" ); |
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[1] | 400 | } |
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| 401 | |
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| 402 | for( i = wsize << 2 ; i < size ; i++ ) // transfer one byte per iteration |
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| 403 | { |
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[8] | 404 | asm volatile( |
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| 405 | ".set noreorder \n" |
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| 406 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 407 | "mtc2 %0, $24 \n" /* PADDR_EXT <= scxy */ |
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| 408 | "lb $3, 0(%1) \n" /* $3 <= *src */ |
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| 409 | "mtc2 %2, $24 \n" /* PADDR_EXT <= dcxy */ |
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| 410 | "sb $3, 0(%3) \n" /* *dst <= $3 */ |
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| 411 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 412 | ".set reorder \n" |
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| 413 | : : "r"(scxy), "r" (sptr+i), "r"(dcxy), "r" (dptr+i) : "$3", "$15" ); |
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[1] | 414 | } |
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| 415 | |
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[121] | 416 | hal_restore_irq( save_sr ); |
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[1] | 417 | |
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[121] | 418 | } // end hal_remote_memcpy() |
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| 419 | |
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| 420 | /////////////////////////////////// |
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| 421 | void hal_remote_strcpy( xptr_t dst, |
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| 422 | xptr_t src ) |
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| 423 | { |
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| 424 | uint32_t save_sr; |
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| 425 | uint32_t dptr = (uint32_t)GET_PTR( dst ); |
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| 426 | uint32_t dcxy = (uint32_t)GET_CXY( dst ); |
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| 427 | uint32_t sptr = (uint32_t)GET_PTR( src ); |
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| 428 | uint32_t scxy = (uint32_t)GET_CXY( src ); |
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| 429 | |
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| 430 | hal_disable_irq( &save_sr ); |
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| 431 | |
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| 432 | // loop on characters while non NUL |
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| 433 | asm volatile( |
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| 434 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 435 | "1: \n" /* loop entry */ |
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| 436 | "mtc2 %0, $24 \n" /* PADDR_EXT <= scxy */ |
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| 437 | "lb $13, 0(%1) \n" /* read char from src string */ |
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| 438 | "mtc2 %2, $24 \n" /* PADDR_EXT <= dcxy */ |
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| 439 | "sb $13, 0(%3) \n" /* store char to dst string */ |
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| 440 | "addi %1, %1, 1 \n" /* increment sptr pointer */ |
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| 441 | "addi %3, %3, 1 \n" /* increment dptr pointer */ |
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| 442 | "bne $13, $0, 1b \n" /* test NUL */ |
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| 443 | "nop \n" |
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| 444 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 445 | : : "r"(scxy), "r"(sptr), "r"(dcxy), "r"(dptr) : "$13","$15", "memory" ); |
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| 446 | |
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| 447 | hal_restore_irq( save_sr ); |
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| 448 | |
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| 449 | } // end hal_remote_strcpy() |
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[313] | 450 | |
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| 451 | //////////////////////////////////////// |
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| 452 | void hal_remote_memset( xptr_t buf_xp, |
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| 453 | uint8_t byte, |
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| 454 | uint32_t size ) |
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| 455 | { |
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| 456 | uint32_t save_sr; |
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| 457 | uint32_t i; |
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| 458 | uint32_t wsize; |
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| 459 | uint32_t buf_ptr = (uint32_t)GET_PTR( buf_xp ); |
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| 460 | uint32_t buf_cxy = (uint32_t)GET_CXY( buf_xp ); |
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| 461 | uint32_t word = ((uint32_t)byte)<<24 | |
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| 462 | ((uint32_t)byte)<<16 | |
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| 463 | ((uint32_t)byte)<<8 | |
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| 464 | ((uint32_t)byte) ; |
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| 465 | |
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| 466 | hal_disable_irq( &save_sr ); |
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| 467 | |
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| 468 | if( (buf_ptr & 0x3) ) wsize = 0; // do it all in bytes |
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| 469 | else wsize = size >> 2; |
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| 470 | |
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| 471 | for( i = 0 ; i < wsize ; i++ ) // transfer one word per iteration |
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| 472 | { |
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| 473 | asm volatile( |
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| 474 | ".set noreorder \n" |
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| 475 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 476 | "mtc2 %0, $24 \n" /* PADDR_EXT <= buf_cxy */ |
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| 477 | "sw %2, 0(%1) \n" /* set one word */ |
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| 478 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 479 | ".set reorder \n" |
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| 480 | : : "r"(buf_cxy), "r" (buf_ptr+(i<<2)), "r"(byte) : "$15" ); |
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| 481 | } |
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| 482 | |
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| 483 | for( i = wsize << 2 ; i < size ; i++ ) // transfer one byte per iteration |
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| 484 | { |
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| 485 | asm volatile( |
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| 486 | ".set noreorder \n" |
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| 487 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 488 | "mtc2 %0, $24 \n" /* PADDR_EXT <= buf_cxy */ |
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| 489 | "sb %2, 0(%1) \n" /* set one byte */ |
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| 490 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 491 | ".set reorder \n" |
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| 492 | : : "r"(buf_cxy), "r"(buf_ptr+i), "r"(word) : "$15" ); |
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| 493 | } |
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| 494 | |
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| 495 | hal_restore_irq( save_sr ); |
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| 496 | |
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| 497 | } // end hal_remote_memset() |
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| 498 | |
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