[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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[121] | 32 | uint32_t save_sr; |
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[1] | 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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[121] | 36 | hal_disable_irq( &save_sr ); |
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| 37 | |
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[8] | 38 | asm volatile( |
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| 39 | ".set noreorder \n" |
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| 40 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 41 | "mtc2 %2, $24 \n" /* PADDR_EXT <= cxy */ |
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| 42 | "sb %0, 0(%1) \n" /* *paddr <= value */ |
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| 43 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 44 | "sync \n" |
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| 45 | ".set reorder \n" |
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| 46 | : : "r" (data), "r" (ptr), "r" (cxy) : "$15" ); |
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[121] | 47 | |
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| 48 | hal_restore_irq( save_sr ); |
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| 49 | |
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[1] | 50 | } |
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| 51 | |
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| 52 | ///////////////////////////////// |
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| 53 | void hal_remote_sw( xptr_t xp, |
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| 54 | uint32_t data ) |
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| 55 | { |
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[121] | 56 | uint32_t save_sr; |
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[1] | 57 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 58 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 59 | |
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[121] | 60 | hal_disable_irq( &save_sr ); |
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| 61 | |
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[1] | 62 | asm volatile( "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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[8] | 63 | ".set noreorder \n" |
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| 64 | "mtc2 %2, $24 \n" /* PADDR_EXT <= cxy */ |
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| 65 | "sw %0, 0(%1) \n" /* *paddr <= value */ |
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| 66 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 67 | "sync \n" |
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| 68 | ".set reorder \n" |
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| 69 | : : "r" (data), "r" (ptr), "r" (cxy) : "$15" ); |
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[121] | 70 | |
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| 71 | hal_restore_irq( save_sr ); |
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| 72 | |
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[1] | 73 | } |
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| 74 | |
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| 75 | ////////////////////////////////// |
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| 76 | void hal_remote_swd( xptr_t xp, |
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| 77 | uint64_t data ) |
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| 78 | { |
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[121] | 79 | uint32_t save_sr; |
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[1] | 80 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 81 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 82 | |
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| 83 | uint32_t data_lsb = (uint32_t)data; |
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| 84 | uint32_t data_msb = (uint32_t)(data>>32); |
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| 85 | |
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[121] | 86 | hal_disable_irq( &save_sr ); |
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| 87 | |
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[8] | 88 | asm volatile( |
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| 89 | ".set noreorder \n" |
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| 90 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 91 | "mtc2 %3, $24 \n" /* PADDR_EXT <= cxy */ |
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| 92 | "sw %0, 0(%2) \n" /* *paddr <= lsb */ |
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| 93 | "sw %1, 4(%2) \n" /* *(paddr+4) <= msb */ |
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| 94 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 95 | "sync \n" |
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| 96 | ".set reorder \n" |
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| 97 | : : "r" (data_lsb), "r" (data_msb), "r" (ptr), "r" (cxy) : "$15" ); |
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[121] | 98 | |
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| 99 | hal_restore_irq( save_sr ); |
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| 100 | |
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[1] | 101 | } |
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| 102 | |
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| 103 | //////////////////////////////////// |
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| 104 | void hal_remote_spt( xptr_t xp, |
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| 105 | void * pt ) |
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| 106 | { |
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| 107 | hal_remote_sw ( xp , (uint32_t)pt ); |
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| 108 | } |
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| 109 | |
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| 110 | //////////////////////////////// |
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[72] | 111 | uint8_t hal_remote_lb( xptr_t xp ) |
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[1] | 112 | { |
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[121] | 113 | uint32_t save_sr; |
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[1] | 114 | char data; |
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| 115 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 116 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 117 | |
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[121] | 118 | hal_disable_irq( &save_sr ); |
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| 119 | |
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[8] | 120 | asm volatile( |
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| 121 | ".set noreorder \n" |
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| 122 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 123 | "mtc2 %2, $24 \n" /* PADDR_EXT <= cxy */ |
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| 124 | "lb %0, 0(%1) \n" /* data <= *paddr */ |
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| 125 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 126 | ".set reorder \n" |
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| 127 | : "=r" (data) : "r" (ptr), "r" (cxy) : "$15" ); |
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[1] | 128 | |
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[121] | 129 | hal_restore_irq( save_sr ); |
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| 130 | |
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[1] | 131 | return ( data ); |
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| 132 | } |
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| 133 | |
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| 134 | //////////////////////////////////// |
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| 135 | uint32_t hal_remote_lw( xptr_t xp ) |
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| 136 | { |
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[121] | 137 | uint32_t save_sr; |
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[1] | 138 | uint32_t data; |
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| 139 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 140 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 141 | |
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[121] | 142 | hal_disable_irq( &save_sr ); |
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| 143 | |
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[8] | 144 | asm volatile( |
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| 145 | ".set noreorder \n" |
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| 146 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 147 | "mtc2 %2, $24 \n" /* PADDR_EXT <= cxy */ |
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| 148 | "lw %0, 0(%1) \n" /* data <= *paddr */ |
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| 149 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 150 | ".set reorder \n" |
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| 151 | : "=r" (data) : "r" (ptr), "r" (cxy) : "$15" ); |
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[1] | 152 | |
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[121] | 153 | hal_restore_irq( save_sr ); |
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| 154 | |
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[1] | 155 | return ( data ); |
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| 156 | } |
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| 157 | |
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| 158 | ///////////////////////////////////// |
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| 159 | uint64_t hal_remote_lwd( xptr_t xp ) |
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| 160 | { |
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[121] | 161 | uint32_t save_sr; |
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[1] | 162 | uint32_t data_lsb; |
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| 163 | uint32_t data_msb; |
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| 164 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 165 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 166 | |
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[121] | 167 | hal_disable_irq( &save_sr ); |
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| 168 | |
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[8] | 169 | asm volatile( |
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| 170 | ".set noreorder \n" |
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| 171 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 172 | "mtc2 %3, $24 \n" /* PADDR_EXT <= cxy */ |
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| 173 | "lw %0, 0(%2) \n" /* data_lsb <= *paddr */ |
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| 174 | "lw %1, 4(%2) \n" /* data_msb <= *paddr+4 */ |
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| 175 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 176 | ".set reorder \n" |
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| 177 | : "=r" (data_lsb), "=r"(data_msb) : "r" (ptr), "r" (cxy) : "$15" ); |
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[1] | 178 | |
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[121] | 179 | hal_restore_irq( save_sr ); |
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| 180 | |
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[1] | 181 | return ( (((uint64_t)data_msb)<<32) + (((uint64_t)data_lsb)) ); |
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[121] | 182 | |
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[1] | 183 | } |
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| 184 | |
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| 185 | //////////////////////////////////// |
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[92] | 186 | void * hal_remote_lpt( xptr_t xp ) |
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[1] | 187 | { |
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| 188 | return (void *)hal_remote_lw ( xp ); |
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| 189 | } |
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| 190 | |
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| 191 | /////////////////////////////////////////// |
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| 192 | bool_t hal_remote_atomic_cas( xptr_t xp, |
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| 193 | uint32_t old, |
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| 194 | uint32_t new ) |
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| 195 | { |
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[121] | 196 | uint32_t save_sr; |
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[1] | 197 | bool_t isAtomic; |
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| 198 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 199 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 200 | |
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[121] | 201 | hal_disable_irq( &save_sr ); |
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| 202 | |
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[8] | 203 | asm volatile( |
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| 204 | ".set noreorder \n" |
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| 205 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 206 | "mtc2 %4, $24 \n" /* PADDR_EXT <= cxy */ |
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| 207 | "or $8, $0, %3 \n" /* $8 <= new */ |
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| 208 | "ll $3, 0(%1) \n" /* $3 <= *paddr */ |
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| 209 | "bne $3, %2, 1f \n" /* if ($3 != old) */ |
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| 210 | "li $7, 0 \n" /* $7 <= 0 */ |
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| 211 | "sc $8, (%1) \n" /* *paddr <= new */ |
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| 212 | "or $7, $8, $0 \n" /* $7 <= atomic */ |
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| 213 | "sync \n" |
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| 214 | "1: \n" |
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| 215 | "or %0, $7, $0 \n" /* isAtomic <= $7 */ |
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| 216 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 217 | ".set reorder \n" |
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| 218 | : "=&r" (isAtomic) : "r" (ptr), "r" (old) , "r" (new), "r" (cxy) |
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| 219 | : "$3", "$7", "$8", "$15" ); |
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[1] | 220 | |
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[121] | 221 | hal_restore_irq( save_sr ); |
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| 222 | |
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[1] | 223 | return isAtomic; |
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| 224 | |
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[121] | 225 | } // end hal_remote_atomic_cas() |
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| 226 | |
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[1] | 227 | //////////////////////////////////////////// |
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| 228 | uint32_t hal_remote_atomic_add( xptr_t xp, |
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| 229 | uint32_t incr ) |
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| 230 | { |
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[121] | 231 | uint32_t save_sr; |
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[1] | 232 | uint32_t current; |
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| 233 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 234 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 235 | |
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[121] | 236 | hal_disable_irq( &save_sr ); |
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| 237 | |
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[8] | 238 | asm volatile( |
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| 239 | ".set noreorder \n" |
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| 240 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 241 | "mtc2 %3, $24 \n" /* PADDR_EXT <= cxy */ |
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| 242 | "1: \n" |
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| 243 | "ll %0, (%1) \n" /* current <= *paddr */ |
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| 244 | "addu $3, %0, %2 \n" /* $3 <= current + incr */ |
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| 245 | "sc $3, (%1) \n" /* *paddr <= $3 */ |
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| 246 | "beq $3, $0, 1b \n" /* retry if failure */ |
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| 247 | "nop \n" |
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| 248 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 249 | ".set reorder \n" |
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| 250 | : "=&r" (current) : "r" (ptr), "r" (incr), "r" (cxy) : "$3", "$15" ); |
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[1] | 251 | |
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[121] | 252 | hal_restore_irq( save_sr ); |
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| 253 | |
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[1] | 254 | return current; |
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| 255 | |
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[121] | 256 | } // end hal_remote_atomic_add() |
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| 257 | |
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[1] | 258 | //////////////////////////////////////////// |
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| 259 | uint32_t hal_remote_atomic_and( xptr_t xp, |
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| 260 | uint32_t mask ) |
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| 261 | { |
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[121] | 262 | uint32_t save_sr; |
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[1] | 263 | uint32_t current; |
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| 264 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 265 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 266 | |
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[121] | 267 | hal_disable_irq( &save_sr ); |
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| 268 | |
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[8] | 269 | asm volatile( |
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| 270 | ".set noreorder \n" |
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| 271 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 272 | "mtc2 %3, $24 \n" /* PADDR_EXT <= cxy */ |
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| 273 | "1: \n" |
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| 274 | "ll %0, (%1) \n" /* current <= *paddr */ |
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| 275 | "and $3, %0, %2 \n" /* $3 <= current & mask */ |
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| 276 | "sc $3, (%1) \n" /* *paddr <= $3 */ |
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| 277 | "beq $3, $0, 1b \n" /* retry if failure */ |
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| 278 | "nop \n" |
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| 279 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 280 | ".set reorder \n" |
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| 281 | : "=&r" (current) : "r" (ptr), "r" (mask), "r" (cxy) : "$3", "$15" ); |
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[1] | 282 | |
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[121] | 283 | hal_restore_irq( save_sr ); |
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| 284 | |
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[1] | 285 | return current; |
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| 286 | |
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[121] | 287 | } // end hal_remote_atomic_and() |
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| 288 | |
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[1] | 289 | //////////////////////////////////////////// |
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| 290 | uint32_t hal_remote_atomic_or( xptr_t xp, |
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| 291 | uint32_t mask ) |
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| 292 | { |
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[121] | 293 | uint32_t save_sr; |
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[1] | 294 | uint32_t current; |
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| 295 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 296 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 297 | |
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[121] | 298 | hal_disable_irq( &save_sr ); |
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| 299 | |
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[8] | 300 | asm volatile( |
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| 301 | ".set noreorder \n" |
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| 302 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 303 | "mtc2 %3, $24 \n" /* PADDR_EXT <= cxy */ |
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| 304 | "1: \n" |
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| 305 | "ll %0, (%1) \n" /* current <= *paddr */ |
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| 306 | "or $3, %0, %2 \n" /* $3 <= current | mask */ |
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| 307 | "sc $3, (%1) \n" /* *paddr <= $3 */ |
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| 308 | "beq $3, $0, 1b \n" /* retry if failure */ |
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| 309 | "nop \n" |
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| 310 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 311 | ".set reorder \n" |
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| 312 | : "=&r" (current) : "r" (ptr), "r" (mask), "r" (cxy) : "$3", "$15" ); |
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[1] | 313 | |
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[121] | 314 | hal_restore_irq( save_sr ); |
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| 315 | |
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[1] | 316 | return current; |
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| 317 | |
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[121] | 318 | } // end hal_remote_atomic_or() |
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| 319 | |
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[1] | 320 | ///////////////////////////////////////////////// |
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| 321 | error_t hal_remote_atomic_try_add( xptr_t xp, |
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| 322 | uint32_t incr, |
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| 323 | uint32_t * old ) |
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| 324 | { |
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[121] | 325 | uint32_t save_sr; |
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[1] | 326 | uint32_t current; |
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| 327 | error_t error; |
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| 328 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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| 329 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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| 330 | |
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[121] | 331 | hal_disable_irq( &save_sr ); |
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| 332 | |
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[8] | 333 | asm volatile( |
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| 334 | ".set noreorder \n" |
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| 335 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 336 | "mtc2 %4, $24 \n" /* PADDR_EXT <= cxy */ |
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| 337 | "ll %0, (%2) \n" /* current <= *paddr */ |
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| 338 | "addu $3, %0, %3 \n" /* $3 <= current + incr */ |
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| 339 | "sc $3, (%2) \n" /* *paddr <= $3 */ |
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| 340 | "beq $3, $0, 1f \n" /* exit if failure */ |
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[121] | 341 | "ori %1, $0, 1 \n" /* fail: ret <= 1 */ |
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| 342 | "and %1, $0, $0 \n" /* success: ret <= 0 */ |
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[8] | 343 | "1: \n" |
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| 344 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 345 | ".set reorder \n" |
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| 346 | : "=&r" (current), "=&r" (error) : "r" (ptr), "r" (incr), "r" (cxy) : "$3", "$15" ); |
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[1] | 347 | |
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[121] | 348 | hal_restore_irq( save_sr ); |
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| 349 | |
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[1] | 350 | *old = current; |
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| 351 | |
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| 352 | return error; |
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| 353 | |
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[121] | 354 | } // end hal_remote_atomic_try_add() |
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| 355 | |
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[1] | 356 | ///////////////////////////////////// |
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| 357 | void hal_remote_memcpy( xptr_t dst, |
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| 358 | xptr_t src, |
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| 359 | uint32_t size ) |
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| 360 | { |
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[121] | 361 | uint32_t save_sr; |
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[1] | 362 | uint32_t i; |
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| 363 | uint32_t wsize; |
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| 364 | uint32_t dptr = (uint32_t)GET_PTR( dst ); |
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| 365 | uint32_t dcxy = (uint32_t)GET_CXY( dst ); |
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| 366 | uint32_t sptr = (uint32_t)GET_PTR( src ); |
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| 367 | uint32_t scxy = (uint32_t)GET_CXY( src ); |
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| 368 | |
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[121] | 369 | hal_disable_irq( &save_sr ); |
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| 370 | |
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[1] | 371 | if( (dptr & 0x3) || (sptr & 0x3) ) wsize = 0; // do it all in bytes |
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| 372 | else wsize = size >> 2; |
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| 373 | |
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| 374 | for( i = 0 ; i < wsize ; i++ ) // transfer one word per iteration |
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| 375 | { |
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[8] | 376 | asm volatile( |
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| 377 | ".set noreorder \n" |
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| 378 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 379 | "mtc2 %0, $24 \n" /* PADDR_EXT <= scxy */ |
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| 380 | "lw $3, 0(%1) \n" /* $3 <= *src */ |
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| 381 | "mtc2 %2, $24 \n" /* PADDR_EXT <= dcxy */ |
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| 382 | "sw $3, 0(%3) \n" /* *dst <= $3 */ |
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| 383 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 384 | ".set reorder \n" |
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| 385 | : : "r"(scxy), "r" (sptr+(i<<2)), "r"(dcxy), "r" (dptr+(i<<2)) : "$3", "$15" ); |
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[1] | 386 | } |
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| 387 | |
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| 388 | for( i = wsize << 2 ; i < size ; i++ ) // transfer one byte 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 | "lb $3, 0(%1) \n" /* $3 <= *src */ |
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| 395 | "mtc2 %2, $24 \n" /* PADDR_EXT <= dcxy */ |
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| 396 | "sb $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), "r"(dcxy), "r" (dptr+i) : "$3", "$15" ); |
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[1] | 400 | } |
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| 401 | |
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[121] | 402 | hal_restore_irq( save_sr ); |
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[1] | 403 | |
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[121] | 404 | } // end hal_remote_memcpy() |
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| 405 | |
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| 406 | /////////////////////////////////// |
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| 407 | void hal_remote_strcpy( xptr_t dst, |
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| 408 | xptr_t src ) |
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| 409 | { |
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| 410 | uint32_t save_sr; |
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| 411 | uint32_t dptr = (uint32_t)GET_PTR( dst ); |
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| 412 | uint32_t dcxy = (uint32_t)GET_CXY( dst ); |
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| 413 | uint32_t sptr = (uint32_t)GET_PTR( src ); |
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| 414 | uint32_t scxy = (uint32_t)GET_CXY( src ); |
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| 415 | |
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| 416 | hal_disable_irq( &save_sr ); |
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| 417 | |
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| 418 | // loop on characters while non NUL |
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| 419 | asm volatile( |
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| 420 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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| 421 | "1: \n" /* loop entry */ |
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| 422 | "mtc2 %0, $24 \n" /* PADDR_EXT <= scxy */ |
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| 423 | "lb $13, 0(%1) \n" /* read char from src string */ |
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| 424 | "mtc2 %2, $24 \n" /* PADDR_EXT <= dcxy */ |
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| 425 | "sb $13, 0(%3) \n" /* store char to dst string */ |
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| 426 | "addi %1, %1, 1 \n" /* increment sptr pointer */ |
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| 427 | "addi %3, %3, 1 \n" /* increment dptr pointer */ |
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| 428 | "bne $13, $0, 1b \n" /* test NUL */ |
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| 429 | "nop \n" |
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| 430 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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| 431 | : : "r"(scxy), "r"(sptr), "r"(dcxy), "r"(dptr) : "$13","$15", "memory" ); |
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| 432 | |
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| 433 | hal_restore_irq( save_sr ); |
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| 434 | |
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| 435 | } // end hal_remote_strcpy() |
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