[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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[72] | 29 | uint8_t data ) |
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[1] | 30 | { |
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[121] | 31 | uint32_t save_sr; |
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[1] | 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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[121] | 35 | hal_disable_irq( &save_sr ); |
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| 36 | |
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[8] | 37 | asm volatile( |
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| 38 | ".set noreorder \n" |
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| 39 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 40 | "mtc2 %2, $24 \n" /* PADDR_EXT <= cxy */ |
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| 41 | "sb %0, 0(%1) \n" /* *paddr <= value */ |
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| 42 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 43 | "sync \n" |
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| 44 | ".set reorder \n" |
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| 45 | : : "r" (data), "r" (ptr), "r" (cxy) : "$15" ); |
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[121] | 46 | |
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| 47 | hal_restore_irq( save_sr ); |
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| 48 | |
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[1] | 49 | } |
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| 50 | |
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| 51 | ///////////////////////////////// |
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| 52 | void hal_remote_sw( xptr_t xp, |
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| 53 | uint32_t data ) |
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| 54 | { |
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[121] | 55 | uint32_t save_sr; |
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[1] | 56 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 57 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 58 | |
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[121] | 59 | hal_disable_irq( &save_sr ); |
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| 60 | |
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[1] | 61 | asm volatile( "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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[8] | 62 | ".set noreorder \n" |
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| 63 | "mtc2 %2, $24 \n" /* PADDR_EXT <= cxy */ |
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| 64 | "sw %0, 0(%1) \n" /* *paddr <= value */ |
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| 65 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 66 | "sync \n" |
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| 67 | ".set reorder \n" |
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| 68 | : : "r" (data), "r" (ptr), "r" (cxy) : "$15" ); |
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[121] | 69 | |
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| 70 | hal_restore_irq( save_sr ); |
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| 71 | |
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[1] | 72 | } |
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| 73 | |
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| 74 | ////////////////////////////////// |
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| 75 | void hal_remote_swd( xptr_t xp, |
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| 76 | uint64_t data ) |
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| 77 | { |
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[121] | 78 | uint32_t save_sr; |
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[1] | 79 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 80 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 81 | |
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| 82 | uint32_t data_lsb = (uint32_t)data; |
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| 83 | uint32_t data_msb = (uint32_t)(data>>32); |
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| 84 | |
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[121] | 85 | hal_disable_irq( &save_sr ); |
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| 86 | |
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[8] | 87 | asm volatile( |
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| 88 | ".set noreorder \n" |
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| 89 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 90 | "mtc2 %3, $24 \n" /* PADDR_EXT <= cxy */ |
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| 91 | "sw %0, 0(%2) \n" /* *paddr <= lsb */ |
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| 92 | "sw %1, 4(%2) \n" /* *(paddr+4) <= msb */ |
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| 93 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 94 | "sync \n" |
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| 95 | ".set reorder \n" |
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| 96 | : : "r" (data_lsb), "r" (data_msb), "r" (ptr), "r" (cxy) : "$15" ); |
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[121] | 97 | |
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| 98 | hal_restore_irq( save_sr ); |
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| 99 | |
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[1] | 100 | } |
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| 101 | |
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| 102 | //////////////////////////////////// |
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| 103 | void hal_remote_spt( xptr_t xp, |
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| 104 | void * pt ) |
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| 105 | { |
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| 106 | hal_remote_sw ( xp , (uint32_t)pt ); |
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| 107 | } |
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| 108 | |
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| 109 | //////////////////////////////// |
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[72] | 110 | uint8_t hal_remote_lb( xptr_t xp ) |
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[1] | 111 | { |
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[121] | 112 | uint32_t save_sr; |
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[1] | 113 | char data; |
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| 114 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 115 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 116 | |
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[121] | 117 | hal_disable_irq( &save_sr ); |
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| 118 | |
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[8] | 119 | asm volatile( |
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| 120 | ".set noreorder \n" |
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| 121 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 122 | "mtc2 %2, $24 \n" /* PADDR_EXT <= cxy */ |
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| 123 | "lb %0, 0(%1) \n" /* data <= *paddr */ |
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| 124 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 125 | ".set reorder \n" |
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| 126 | : "=r" (data) : "r" (ptr), "r" (cxy) : "$15" ); |
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[1] | 127 | |
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[121] | 128 | hal_restore_irq( save_sr ); |
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| 129 | |
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[1] | 130 | return ( data ); |
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| 131 | } |
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| 132 | |
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| 133 | //////////////////////////////////// |
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| 134 | uint32_t hal_remote_lw( xptr_t xp ) |
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| 135 | { |
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[121] | 136 | uint32_t save_sr; |
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[1] | 137 | uint32_t data; |
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| 138 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 139 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 140 | |
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[121] | 141 | hal_disable_irq( &save_sr ); |
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| 142 | |
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[8] | 143 | asm volatile( |
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| 144 | ".set noreorder \n" |
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| 145 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 146 | "mtc2 %2, $24 \n" /* PADDR_EXT <= cxy */ |
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| 147 | "lw %0, 0(%1) \n" /* data <= *paddr */ |
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| 148 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 149 | ".set reorder \n" |
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| 150 | : "=r" (data) : "r" (ptr), "r" (cxy) : "$15" ); |
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[1] | 151 | |
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[121] | 152 | hal_restore_irq( save_sr ); |
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| 153 | |
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[1] | 154 | return ( data ); |
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| 155 | } |
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| 156 | |
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| 157 | ///////////////////////////////////// |
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| 158 | uint64_t hal_remote_lwd( xptr_t xp ) |
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| 159 | { |
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[121] | 160 | uint32_t save_sr; |
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[1] | 161 | uint32_t data_lsb; |
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| 162 | uint32_t data_msb; |
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| 163 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 164 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 165 | |
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[121] | 166 | hal_disable_irq( &save_sr ); |
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| 167 | |
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[8] | 168 | asm volatile( |
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| 169 | ".set noreorder \n" |
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| 170 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 171 | "mtc2 %3, $24 \n" /* PADDR_EXT <= cxy */ |
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| 172 | "lw %0, 0(%2) \n" /* data_lsb <= *paddr */ |
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| 173 | "lw %1, 4(%2) \n" /* data_msb <= *paddr+4 */ |
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| 174 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 175 | ".set reorder \n" |
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| 176 | : "=r" (data_lsb), "=r"(data_msb) : "r" (ptr), "r" (cxy) : "$15" ); |
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[1] | 177 | |
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[121] | 178 | hal_restore_irq( save_sr ); |
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| 179 | |
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[1] | 180 | return ( (((uint64_t)data_msb)<<32) + (((uint64_t)data_lsb)) ); |
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[121] | 181 | |
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[1] | 182 | } |
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| 183 | |
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| 184 | //////////////////////////////////// |
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[92] | 185 | void * hal_remote_lpt( xptr_t xp ) |
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[1] | 186 | { |
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| 187 | return (void *)hal_remote_lw ( xp ); |
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| 188 | } |
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| 189 | |
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| 190 | /////////////////////////////////////////// |
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| 191 | bool_t hal_remote_atomic_cas( xptr_t xp, |
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| 192 | uint32_t old, |
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| 193 | uint32_t new ) |
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| 194 | { |
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[121] | 195 | uint32_t save_sr; |
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[1] | 196 | bool_t isAtomic; |
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| 197 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 198 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 199 | |
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[121] | 200 | hal_disable_irq( &save_sr ); |
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| 201 | |
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[8] | 202 | asm volatile( |
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| 203 | ".set noreorder \n" |
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| 204 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 205 | "mtc2 %4, $24 \n" /* PADDR_EXT <= cxy */ |
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| 206 | "or $8, $0, %3 \n" /* $8 <= new */ |
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| 207 | "ll $3, 0(%1) \n" /* $3 <= *paddr */ |
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| 208 | "bne $3, %2, 1f \n" /* if ($3 != old) */ |
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| 209 | "li $7, 0 \n" /* $7 <= 0 */ |
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| 210 | "sc $8, (%1) \n" /* *paddr <= new */ |
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| 211 | "or $7, $8, $0 \n" /* $7 <= atomic */ |
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| 212 | "sync \n" |
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| 213 | "1: \n" |
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| 214 | "or %0, $7, $0 \n" /* isAtomic <= $7 */ |
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| 215 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 216 | ".set reorder \n" |
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| 217 | : "=&r" (isAtomic) : "r" (ptr), "r" (old) , "r" (new), "r" (cxy) |
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| 218 | : "$3", "$7", "$8", "$15" ); |
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[1] | 219 | |
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[121] | 220 | hal_restore_irq( save_sr ); |
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| 221 | |
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[1] | 222 | return isAtomic; |
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| 223 | |
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[121] | 224 | } // end hal_remote_atomic_cas() |
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| 225 | |
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[1] | 226 | //////////////////////////////////////////// |
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| 227 | uint32_t hal_remote_atomic_add( xptr_t xp, |
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| 228 | uint32_t incr ) |
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| 229 | { |
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[121] | 230 | uint32_t save_sr; |
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[1] | 231 | uint32_t current; |
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| 232 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 233 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 234 | |
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[121] | 235 | hal_disable_irq( &save_sr ); |
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| 236 | |
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[8] | 237 | asm volatile( |
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| 238 | ".set noreorder \n" |
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| 239 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 240 | "mtc2 %3, $24 \n" /* PADDR_EXT <= cxy */ |
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| 241 | "1: \n" |
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| 242 | "ll %0, (%1) \n" /* current <= *paddr */ |
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| 243 | "addu $3, %0, %2 \n" /* $3 <= current + incr */ |
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| 244 | "sc $3, (%1) \n" /* *paddr <= $3 */ |
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| 245 | "beq $3, $0, 1b \n" /* retry if failure */ |
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| 246 | "nop \n" |
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| 247 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 248 | ".set reorder \n" |
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| 249 | : "=&r" (current) : "r" (ptr), "r" (incr), "r" (cxy) : "$3", "$15" ); |
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[1] | 250 | |
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[121] | 251 | hal_restore_irq( save_sr ); |
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| 252 | |
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[1] | 253 | return current; |
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| 254 | |
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[121] | 255 | } // end hal_remote_atomic_add() |
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| 256 | |
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[1] | 257 | //////////////////////////////////////////// |
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| 258 | uint32_t hal_remote_atomic_and( xptr_t xp, |
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| 259 | uint32_t mask ) |
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| 260 | { |
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[121] | 261 | uint32_t save_sr; |
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[1] | 262 | uint32_t current; |
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| 263 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 264 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 265 | |
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[121] | 266 | hal_disable_irq( &save_sr ); |
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| 267 | |
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[8] | 268 | asm volatile( |
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| 269 | ".set noreorder \n" |
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| 270 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 271 | "mtc2 %3, $24 \n" /* PADDR_EXT <= cxy */ |
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| 272 | "1: \n" |
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| 273 | "ll %0, (%1) \n" /* current <= *paddr */ |
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| 274 | "and $3, %0, %2 \n" /* $3 <= current & mask */ |
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| 275 | "sc $3, (%1) \n" /* *paddr <= $3 */ |
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| 276 | "beq $3, $0, 1b \n" /* retry if failure */ |
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| 277 | "nop \n" |
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| 278 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 279 | ".set reorder \n" |
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| 280 | : "=&r" (current) : "r" (ptr), "r" (mask), "r" (cxy) : "$3", "$15" ); |
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[1] | 281 | |
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[121] | 282 | hal_restore_irq( save_sr ); |
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| 283 | |
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[1] | 284 | return current; |
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| 285 | |
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[121] | 286 | } // end hal_remote_atomic_and() |
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| 287 | |
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[1] | 288 | //////////////////////////////////////////// |
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| 289 | uint32_t hal_remote_atomic_or( xptr_t xp, |
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| 290 | uint32_t mask ) |
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| 291 | { |
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[121] | 292 | uint32_t save_sr; |
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[1] | 293 | uint32_t current; |
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| 294 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 295 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 296 | |
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[121] | 297 | hal_disable_irq( &save_sr ); |
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| 298 | |
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[8] | 299 | asm volatile( |
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| 300 | ".set noreorder \n" |
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| 301 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 302 | "mtc2 %3, $24 \n" /* PADDR_EXT <= cxy */ |
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| 303 | "1: \n" |
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| 304 | "ll %0, (%1) \n" /* current <= *paddr */ |
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| 305 | "or $3, %0, %2 \n" /* $3 <= current | mask */ |
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| 306 | "sc $3, (%1) \n" /* *paddr <= $3 */ |
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| 307 | "beq $3, $0, 1b \n" /* retry if failure */ |
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| 308 | "nop \n" |
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| 309 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 310 | ".set reorder \n" |
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| 311 | : "=&r" (current) : "r" (ptr), "r" (mask), "r" (cxy) : "$3", "$15" ); |
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[1] | 312 | |
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[121] | 313 | hal_restore_irq( save_sr ); |
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| 314 | |
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[1] | 315 | return current; |
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| 316 | |
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[121] | 317 | } // end hal_remote_atomic_or() |
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| 318 | |
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[1] | 319 | ///////////////////////////////////////////////// |
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| 320 | error_t hal_remote_atomic_try_add( xptr_t xp, |
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| 321 | uint32_t incr, |
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| 322 | uint32_t * old ) |
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| 323 | { |
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[121] | 324 | uint32_t save_sr; |
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[1] | 325 | uint32_t current; |
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| 326 | error_t error; |
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| 327 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 328 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 329 | |
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[121] | 330 | hal_disable_irq( &save_sr ); |
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| 331 | |
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[8] | 332 | asm volatile( |
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| 333 | ".set noreorder \n" |
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| 334 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 335 | "mtc2 %4, $24 \n" /* PADDR_EXT <= cxy */ |
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| 336 | "ll %0, (%2) \n" /* current <= *paddr */ |
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| 337 | "addu $3, %0, %3 \n" /* $3 <= current + incr */ |
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| 338 | "sc $3, (%2) \n" /* *paddr <= $3 */ |
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| 339 | "beq $3, $0, 1f \n" /* exit if failure */ |
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[121] | 340 | "ori %1, $0, 1 \n" /* fail: ret <= 1 */ |
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| 341 | "and %1, $0, $0 \n" /* success: ret <= 0 */ |
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[8] | 342 | "1: \n" |
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| 343 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 344 | ".set reorder \n" |
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| 345 | : "=&r" (current), "=&r" (error) : "r" (ptr), "r" (incr), "r" (cxy) : "$3", "$15" ); |
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[1] | 346 | |
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[121] | 347 | hal_restore_irq( save_sr ); |
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| 348 | |
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[1] | 349 | *old = current; |
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| 350 | |
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| 351 | return error; |
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| 352 | |
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[121] | 353 | } // end hal_remote_atomic_try_add() |
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| 354 | |
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[1] | 355 | ///////////////////////////////////// |
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| 356 | void hal_remote_memcpy( xptr_t dst, |
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| 357 | xptr_t src, |
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| 358 | uint32_t size ) |
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| 359 | { |
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[121] | 360 | uint32_t save_sr; |
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[1] | 361 | uint32_t i; |
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| 362 | uint32_t wsize; |
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| 363 | uint32_t dptr = (uint32_t)GET_PTR( dst ); |
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| 364 | uint32_t dcxy = (uint32_t)GET_CXY( dst ); |
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| 365 | uint32_t sptr = (uint32_t)GET_PTR( src ); |
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| 366 | uint32_t scxy = (uint32_t)GET_CXY( src ); |
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| 367 | |
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[121] | 368 | hal_disable_irq( &save_sr ); |
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| 369 | |
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[1] | 370 | if( (dptr & 0x3) || (sptr & 0x3) ) wsize = 0; // do it all in bytes |
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| 371 | else wsize = size >> 2; |
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| 372 | |
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| 373 | for( i = 0 ; i < wsize ; i++ ) // transfer one word per iteration |
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| 374 | { |
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[8] | 375 | asm volatile( |
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| 376 | ".set noreorder \n" |
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| 377 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 378 | "mtc2 %0, $24 \n" /* PADDR_EXT <= scxy */ |
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| 379 | "lw $3, 0(%1) \n" /* $3 <= *src */ |
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| 380 | "mtc2 %2, $24 \n" /* PADDR_EXT <= dcxy */ |
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| 381 | "sw $3, 0(%3) \n" /* *dst <= $3 */ |
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| 382 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 383 | ".set reorder \n" |
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| 384 | : : "r"(scxy), "r" (sptr+(i<<2)), "r"(dcxy), "r" (dptr+(i<<2)) : "$3", "$15" ); |
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[1] | 385 | } |
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| 386 | |
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| 387 | for( i = wsize << 2 ; i < size ; i++ ) // transfer one byte 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 | "lb $3, 0(%1) \n" /* $3 <= *src */ |
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| 394 | "mtc2 %2, $24 \n" /* PADDR_EXT <= dcxy */ |
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| 395 | "sb $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), "r"(dcxy), "r" (dptr+i) : "$3", "$15" ); |
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[1] | 399 | } |
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| 400 | |
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[121] | 401 | hal_restore_irq( save_sr ); |
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[1] | 402 | |
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[121] | 403 | } // end hal_remote_memcpy() |
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| 404 | |
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| 405 | /////////////////////////////////// |
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| 406 | void hal_remote_strcpy( xptr_t dst, |
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| 407 | xptr_t src ) |
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| 408 | { |
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| 409 | uint32_t save_sr; |
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| 410 | uint32_t dptr = (uint32_t)GET_PTR( dst ); |
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| 411 | uint32_t dcxy = (uint32_t)GET_CXY( dst ); |
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| 412 | uint32_t sptr = (uint32_t)GET_PTR( src ); |
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| 413 | uint32_t scxy = (uint32_t)GET_CXY( src ); |
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| 414 | |
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| 415 | hal_disable_irq( &save_sr ); |
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| 416 | |
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| 417 | // loop on characters while non NUL |
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| 418 | asm volatile( |
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| 419 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 420 | "1: \n" /* loop entry */ |
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| 421 | "mtc2 %0, $24 \n" /* PADDR_EXT <= scxy */ |
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| 422 | "lb $13, 0(%1) \n" /* read char from src string */ |
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| 423 | "mtc2 %2, $24 \n" /* PADDR_EXT <= dcxy */ |
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| 424 | "sb $13, 0(%3) \n" /* store char to dst string */ |
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| 425 | "addi %1, %1, 1 \n" /* increment sptr pointer */ |
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| 426 | "addi %3, %3, 1 \n" /* increment dptr pointer */ |
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| 427 | "bne $13, $0, 1b \n" /* test NUL */ |
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| 428 | "nop \n" |
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| 429 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 430 | : : "r"(scxy), "r"(sptr), "r"(dcxy), "r"(dptr) : "$13","$15", "memory" ); |
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| 431 | |
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| 432 | hal_restore_irq( save_sr ); |
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| 433 | |
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| 434 | } // end hal_remote_strcpy() |
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