1 | /* |
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2 | * hal_remote.c - implementation of Generic Remote Access API for TSAR-MIPS32 |
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3 | * |
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4 | * Authors : Mohammed Karaoui (2015) |
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5 | * Alain Greiner (2016) |
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6 | * |
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7 | * Copyright (c) UPMC Sorbonne Universites |
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8 | * |
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9 | * This file is part of ALMOS-MKH.. |
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10 | * |
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11 | * ALMOS-MKH. is free software; you can redistribute it and/or modify it |
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12 | * under the terms of the GNU General Public License as published by |
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13 | * the Free Software Foundation; version 2.0 of the License. |
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14 | * |
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15 | * ALMOS-MKH. is distributed in the hope that it will be useful, but |
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16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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18 | * General Public License for more details. |
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19 | * |
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20 | * You should have received a copy of the GNU General Public License |
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21 | * along with ALMOS-MKH.; if not, write to the Free Software Foundation, |
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22 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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23 | */ |
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24 | |
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25 | #include <hal_types.h> |
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26 | |
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27 | //////////////////////////////// |
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28 | void hal_remote_sb( xptr_t xp, |
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29 | char data ) |
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30 | { |
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31 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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32 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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33 | |
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34 | asm volatile( |
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35 | ".set noreorder \n" |
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36 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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37 | "mtc2 %2, $24 \n" /* PADDR_EXT <= cxy */ |
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38 | "sb %0, 0(%1) \n" /* *paddr <= value */ |
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39 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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40 | "sync \n" |
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41 | ".set reorder \n" |
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42 | : : "r" (data), "r" (ptr), "r" (cxy) : "$15" ); |
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43 | } |
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44 | |
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45 | ///////////////////////////////// |
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46 | void hal_remote_sw( xptr_t xp, |
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47 | uint32_t data ) |
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48 | { |
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49 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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50 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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51 | |
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52 | asm volatile( "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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53 | ".set noreorder \n" |
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54 | "mtc2 %2, $24 \n" /* PADDR_EXT <= cxy */ |
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55 | "sw %0, 0(%1) \n" /* *paddr <= value */ |
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56 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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57 | "sync \n" |
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58 | ".set reorder \n" |
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59 | : : "r" (data), "r" (ptr), "r" (cxy) : "$15" ); |
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60 | } |
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61 | |
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62 | ////////////////////////////////// |
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63 | void hal_remote_swd( xptr_t xp, |
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64 | uint64_t data ) |
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65 | { |
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66 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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67 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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68 | |
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69 | uint32_t data_lsb = (uint32_t)data; |
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70 | uint32_t data_msb = (uint32_t)(data>>32); |
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71 | |
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72 | asm volatile( |
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73 | ".set noreorder \n" |
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74 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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75 | "mtc2 %3, $24 \n" /* PADDR_EXT <= cxy */ |
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76 | "sw %0, 0(%2) \n" /* *paddr <= lsb */ |
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77 | "sw %1, 4(%2) \n" /* *(paddr+4) <= msb */ |
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78 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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79 | "sync \n" |
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80 | ".set reorder \n" |
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81 | : : "r" (data_lsb), "r" (data_msb), "r" (ptr), "r" (cxy) : "$15" ); |
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82 | } |
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83 | |
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84 | //////////////////////////////////// |
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85 | void hal_remote_spt( xptr_t xp, |
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86 | void * pt ) |
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87 | { |
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88 | hal_remote_sw ( xp , (uint32_t)pt ); |
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89 | } |
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90 | |
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91 | //////////////////////////////// |
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92 | char hal_remote_lb( xptr_t xp ) |
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93 | { |
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94 | char data; |
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95 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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96 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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97 | |
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98 | asm volatile( |
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99 | ".set noreorder \n" |
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100 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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101 | "mtc2 %2, $24 \n" /* PADDR_EXT <= cxy */ |
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102 | "lb %0, 0(%1) \n" /* data <= *paddr */ |
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103 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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104 | ".set reorder \n" |
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105 | : "=r" (data) : "r" (ptr), "r" (cxy) : "$15" ); |
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106 | |
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107 | return ( data ); |
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108 | } |
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109 | |
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110 | //////////////////////////////////// |
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111 | uint32_t hal_remote_lw( xptr_t xp ) |
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112 | { |
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113 | uint32_t 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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117 | asm volatile( |
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118 | ".set noreorder \n" |
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119 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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120 | "mtc2 %2, $24 \n" /* PADDR_EXT <= cxy */ |
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121 | "lw %0, 0(%1) \n" /* data <= *paddr */ |
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122 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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123 | ".set reorder \n" |
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124 | : "=r" (data) : "r" (ptr), "r" (cxy) : "$15" ); |
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125 | |
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126 | return ( data ); |
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127 | } |
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128 | |
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129 | ///////////////////////////////////// |
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130 | uint64_t hal_remote_lwd( xptr_t xp ) |
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131 | { |
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132 | uint32_t data_lsb; |
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133 | uint32_t data_msb; |
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134 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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135 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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136 | |
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137 | asm volatile( |
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138 | ".set noreorder \n" |
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139 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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140 | "mtc2 %3, $24 \n" /* PADDR_EXT <= cxy */ |
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141 | "lw %0, 0(%2) \n" /* data_lsb <= *paddr */ |
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142 | "lw %1, 4(%2) \n" /* data_msb <= *paddr+4 */ |
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143 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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144 | ".set reorder \n" |
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145 | : "=r" (data_lsb), "=r"(data_msb) : "r" (ptr), "r" (cxy) : "$15" ); |
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146 | |
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147 | return ( (((uint64_t)data_msb)<<32) + (((uint64_t)data_lsb)) ); |
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148 | } |
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149 | |
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150 | //////////////////////////////////// |
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151 | void * hal_remote_lpt( xptr_t xp, |
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152 | void * pt ) |
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153 | { |
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154 | return (void *)hal_remote_lw ( xp ); |
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155 | } |
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156 | |
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157 | //////////////////////////////////////// |
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158 | uint32_t hal_remote_lw_unc( xptr_t xp ) |
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159 | { |
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160 | uint32_t data; |
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161 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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162 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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163 | |
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164 | asm volatile( |
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165 | ".set noreorder \n" |
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166 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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167 | "mtc2 %2, $24 \n" /* PADDR_EXT <= cxy */ |
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168 | "ll %0, 0(%1) \n" /* data <= *paddr */ |
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169 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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170 | ".set reorder \n" |
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171 | : "=r" (data) : "r" (ptr), "r" (cxy) : "$15" ); |
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172 | |
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173 | return ( data ); |
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174 | } |
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175 | |
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176 | /////////////////////////////////////////// |
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177 | bool_t hal_remote_atomic_cas( xptr_t xp, |
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178 | uint32_t old, |
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179 | uint32_t new ) |
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180 | { |
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181 | bool_t isAtomic; |
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182 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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183 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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184 | |
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185 | asm volatile( |
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186 | ".set noreorder \n" |
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187 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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188 | "mtc2 %4, $24 \n" /* PADDR_EXT <= cxy */ |
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189 | "or $8, $0, %3 \n" /* $8 <= new */ |
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190 | "ll $3, 0(%1) \n" /* $3 <= *paddr */ |
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191 | "bne $3, %2, 1f \n" /* if ($3 != old) */ |
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192 | "li $7, 0 \n" /* $7 <= 0 */ |
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193 | "sc $8, (%1) \n" /* *paddr <= new */ |
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194 | "or $7, $8, $0 \n" /* $7 <= atomic */ |
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195 | "sync \n" |
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196 | "1: \n" |
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197 | "or %0, $7, $0 \n" /* isAtomic <= $7 */ |
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198 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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199 | ".set reorder \n" |
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200 | : "=&r" (isAtomic) : "r" (ptr), "r" (old) , "r" (new), "r" (cxy) |
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201 | : "$3", "$7", "$8", "$15" ); |
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202 | |
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203 | return isAtomic; |
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204 | } |
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205 | |
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206 | //////////////////////////////////////////// |
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207 | uint32_t hal_remote_atomic_add( xptr_t xp, |
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208 | uint32_t incr ) |
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209 | { |
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210 | uint32_t current; |
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211 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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212 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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213 | |
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214 | asm volatile( |
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215 | ".set noreorder \n" |
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216 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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217 | "mtc2 %3, $24 \n" /* PADDR_EXT <= cxy */ |
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218 | "1: \n" |
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219 | "ll %0, (%1) \n" /* current <= *paddr */ |
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220 | "addu $3, %0, %2 \n" /* $3 <= current + incr */ |
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221 | "sc $3, (%1) \n" /* *paddr <= $3 */ |
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222 | "beq $3, $0, 1b \n" /* retry if failure */ |
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223 | "nop \n" |
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224 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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225 | ".set reorder \n" |
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226 | : "=&r" (current) : "r" (ptr), "r" (incr), "r" (cxy) : "$3", "$15" ); |
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227 | |
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228 | return current; |
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229 | } |
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230 | |
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231 | //////////////////////////////////////////// |
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232 | uint32_t hal_remote_atomic_and( xptr_t xp, |
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233 | uint32_t mask ) |
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234 | { |
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235 | uint32_t current; |
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236 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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237 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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238 | |
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239 | asm volatile( |
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240 | ".set noreorder \n" |
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241 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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242 | "mtc2 %3, $24 \n" /* PADDR_EXT <= cxy */ |
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243 | "1: \n" |
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244 | "ll %0, (%1) \n" /* current <= *paddr */ |
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245 | "and $3, %0, %2 \n" /* $3 <= current & mask */ |
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246 | "sc $3, (%1) \n" /* *paddr <= $3 */ |
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247 | "beq $3, $0, 1b \n" /* retry if failure */ |
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248 | "nop \n" |
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249 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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250 | ".set reorder \n" |
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251 | : "=&r" (current) : "r" (ptr), "r" (mask), "r" (cxy) : "$3", "$15" ); |
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252 | |
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253 | return current; |
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254 | } |
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255 | |
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256 | //////////////////////////////////////////// |
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257 | uint32_t hal_remote_atomic_or( xptr_t xp, |
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258 | uint32_t mask ) |
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259 | { |
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260 | uint32_t current; |
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261 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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262 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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263 | |
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264 | asm volatile( |
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265 | ".set noreorder \n" |
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266 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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267 | "mtc2 %3, $24 \n" /* PADDR_EXT <= cxy */ |
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268 | "1: \n" |
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269 | "ll %0, (%1) \n" /* current <= *paddr */ |
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270 | "or $3, %0, %2 \n" /* $3 <= current | mask */ |
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271 | "sc $3, (%1) \n" /* *paddr <= $3 */ |
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272 | "beq $3, $0, 1b \n" /* retry if failure */ |
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273 | "nop \n" |
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274 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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275 | ".set reorder \n" |
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276 | : "=&r" (current) : "r" (ptr), "r" (mask), "r" (cxy) : "$3", "$15" ); |
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277 | |
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278 | return current; |
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279 | } |
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280 | |
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281 | ///////////////////////////////////////////////// |
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282 | error_t hal_remote_atomic_try_add( xptr_t xp, |
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283 | uint32_t incr, |
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284 | uint32_t * old ) |
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285 | { |
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286 | uint32_t current; |
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287 | error_t error; |
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288 | uint32_t ptr = (uint32_t)GET_PTR( xp ); |
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289 | uint32_t cxy = (uint32_t)GET_CXY( xp ); |
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290 | |
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291 | asm volatile( |
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292 | ".set noreorder \n" |
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293 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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294 | "mtc2 %4, $24 \n" /* PADDR_EXT <= cxy */ |
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295 | "ll %0, (%2) \n" /* current <= *paddr */ |
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296 | "addu $3, %0, %3 \n" /* $3 <= current + incr */ |
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297 | "sc $3, (%2) \n" /* *paddr <= $3 */ |
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298 | "beq $3, $0, 1f \n" /* exit if failure */ |
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299 | "ori %1, $0, 1 \n" /* fail: ret <= 1 */ |
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300 | "and %1, $0, $0 \n" /* success: ret <= 0 */ |
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301 | "1: \n" |
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302 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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303 | ".set reorder \n" |
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304 | : "=&r" (current), "=&r" (error) : "r" (ptr), "r" (incr), "r" (cxy) : "$3", "$15" ); |
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305 | |
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306 | *old = current; |
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307 | |
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308 | return error; |
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309 | } |
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310 | |
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311 | ///////////////////////////////////// |
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312 | void hal_remote_memcpy( xptr_t dst, |
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313 | xptr_t src, |
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314 | uint32_t size ) |
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315 | { |
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316 | uint32_t i; |
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317 | uint32_t wsize; |
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318 | uint32_t dptr = (uint32_t)GET_PTR( dst ); |
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319 | uint32_t dcxy = (uint32_t)GET_CXY( dst ); |
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320 | uint32_t sptr = (uint32_t)GET_PTR( src ); |
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321 | uint32_t scxy = (uint32_t)GET_CXY( src ); |
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322 | |
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323 | if( (dptr & 0x3) || (sptr & 0x3) ) wsize = 0; // do it all in bytes |
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324 | else wsize = size >> 2; |
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325 | |
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326 | for( i = 0 ; i < wsize ; i++ ) // transfer one word per iteration |
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327 | { |
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328 | asm volatile( |
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329 | ".set noreorder \n" |
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330 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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331 | "mtc2 %0, $24 \n" /* PADDR_EXT <= scxy */ |
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332 | "lw $3, 0(%1) \n" /* $3 <= *src */ |
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333 | "mtc2 %2, $24 \n" /* PADDR_EXT <= dcxy */ |
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334 | "sw $3, 0(%3) \n" /* *dst <= $3 */ |
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335 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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336 | ".set reorder \n" |
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337 | : : "r"(scxy), "r" (sptr+(i<<2)), "r"(dcxy), "r" (dptr+(i<<2)) : "$3", "$15" ); |
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338 | } |
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339 | |
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340 | for( i = wsize << 2 ; i < size ; i++ ) // transfer one byte per iteration |
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341 | { |
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342 | asm volatile( |
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343 | ".set noreorder \n" |
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344 | "mfc2 $15, $24 \n" /* $15 <= PADDR_EXT */ |
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345 | "mtc2 %0, $24 \n" /* PADDR_EXT <= scxy */ |
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346 | "lb $3, 0(%1) \n" /* $3 <= *src */ |
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347 | "mtc2 %2, $24 \n" /* PADDR_EXT <= dcxy */ |
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348 | "sb $3, 0(%3) \n" /* *dst <= $3 */ |
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349 | "mtc2 $15, $24 \n" /* PADDR_EXT <= $15 */ |
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350 | ".set reorder \n" |
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351 | : : "r"(scxy), "r" (sptr+i), "r"(dcxy), "r" (dptr+i) : "$3", "$15" ); |
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352 | } |
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353 | } |
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354 | |
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355 | |
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