1 | /////////////////////////////////////////////////////////////////////////////////// |
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2 | // File : utils.c |
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3 | // Date : 18/10/2013 |
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4 | // Author : alain greiner |
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5 | // Copyright (c) UPMC-LIP6 |
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6 | /////////////////////////////////////////////////////////////////////////////////// |
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7 | // The utils.c and utils.h files are part of the GIET-VM nano-kernel. |
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8 | // They define more or less the GIET-VM HAL (Hardware Abstraction Layer), |
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9 | // and contains various utility functions, that can be used by both the |
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10 | // boot code and the kernel code. |
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11 | /////////////////////////////////////////////////////////////////////////////////// |
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12 | |
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13 | #include <giet_config.h> |
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14 | #include <hard_config.h> |
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15 | #include <mapping_info.h> |
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16 | #include <utils.h> |
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17 | #include <ctx_handler.h> |
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18 | #include <tty_driver.h> |
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19 | #include <stdarg.h> |
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20 | |
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21 | // This global variable is allocated in the boot.c file or in kernel_init.c file |
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22 | extern static_scheduler_t* _schedulers[NB_PROCS_MAX<<(X_WIDTH+Y_WIDTH)]; |
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23 | |
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24 | /////////////////////////////////////////////////////////////////////////////////// |
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25 | // CP0 registers access functions |
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26 | /////////////////////////////////////////////////////////////////////////////////// |
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27 | |
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28 | ///////////////////////// |
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29 | unsigned int _get_sched() |
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30 | { |
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31 | unsigned int ret; |
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32 | asm volatile( "mfc0 %0, $4,2 \n" |
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33 | : "=r"(ret) ); |
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34 | return ret; |
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35 | } |
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36 | /////////////////////// |
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37 | unsigned int _get_epc() |
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38 | { |
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39 | unsigned int ret; |
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40 | asm volatile( "mfc0 %0, $14 \n" |
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41 | : "=r"(ret) ); |
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42 | return ret; |
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43 | } |
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44 | //////////////////////// |
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45 | unsigned int _get_bvar() |
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46 | { |
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47 | unsigned int ret; |
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48 | asm volatile( "mfc0 %0, $8 \n" |
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49 | : "=r"(ret)); |
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50 | return ret; |
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51 | } |
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52 | ////////////////////// |
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53 | unsigned int _get_cr() |
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54 | { |
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55 | unsigned int ret; |
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56 | asm volatile( "mfc0 %0, $13 \n" |
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57 | : "=r"(ret)); |
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58 | return ret; |
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59 | } |
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60 | ////////////////////// |
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61 | unsigned int _get_sr() |
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62 | { |
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63 | unsigned int ret; |
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64 | asm volatile( "mfc0 %0, $12 \n" |
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65 | : "=r"(ret)); |
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66 | return ret; |
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67 | } |
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68 | ////////////////////////// |
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69 | unsigned int _get_procid() |
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70 | { |
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71 | unsigned int ret; |
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72 | asm volatile ( "mfc0 %0, $15, 1 \n" |
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73 | :"=r" (ret) ); |
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74 | return (ret & 0x3FF); |
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75 | } |
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76 | //////////////////////////// |
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77 | unsigned int _get_proctime() |
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78 | { |
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79 | unsigned int ret; |
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80 | asm volatile ( "mfc0 %0, $9 \n" |
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81 | :"=r" (ret) ); |
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82 | return ret; |
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83 | } |
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84 | |
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85 | ///////////////////////////////////////////// |
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86 | void _it_disable( unsigned int * save_sr_ptr) |
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87 | { |
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88 | unsigned int sr = 0; |
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89 | asm volatile( "li $3, 0xFFFFFFFE \n" |
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90 | "mfc0 %0, $12 \n" |
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91 | "and $3, $3, %0 \n" |
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92 | "mtc0 $3, $12 \n" |
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93 | : "+r"(sr) |
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94 | : |
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95 | : "$3" ); |
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96 | *save_sr_ptr = sr; |
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97 | } |
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98 | ////////////////////////////////////////////// |
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99 | void _it_restore( unsigned int * save_sr_ptr ) |
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100 | { |
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101 | unsigned int sr = *save_sr_ptr; |
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102 | asm volatile( "mtc0 %0, $12 \n" |
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103 | : |
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104 | : "r"(sr) |
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105 | : "memory" ); |
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106 | } |
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107 | |
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108 | ///////////////////////////////// |
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109 | void _set_sched(unsigned int val) |
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110 | { |
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111 | asm volatile ( "mtc0 %0, $4, 2 \n" |
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112 | : |
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113 | :"r" (val) ); |
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114 | } |
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115 | ////////////////////////////// |
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116 | void _set_sr(unsigned int val) |
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117 | { |
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118 | asm volatile ( "mtc0 %0, $12 \n" |
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119 | : |
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120 | :"r" (val) ); |
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121 | } |
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122 | |
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123 | |
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124 | /////////////////////////////////////////////////////////////////////////////////// |
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125 | // CP2 registers access functions |
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126 | /////////////////////////////////////////////////////////////////////////////////// |
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127 | |
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128 | //////////////////////////// |
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129 | unsigned int _get_mmu_ptpr() |
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130 | { |
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131 | unsigned int ret; |
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132 | asm volatile( "mfc2 %0, $0 \n" |
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133 | : "=r"(ret) ); |
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134 | return ret; |
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135 | } |
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136 | //////////////////////////// |
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137 | unsigned int _get_mmu_mode() |
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138 | { |
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139 | unsigned int ret; |
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140 | asm volatile( "mfc2 %0, $1 \n" |
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141 | : "=r"(ret) ); |
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142 | return ret; |
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143 | } |
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144 | //////////////////////////////////// |
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145 | void _set_mmu_ptpr(unsigned int val) |
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146 | { |
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147 | asm volatile ( "mtc2 %0, $0 \n" |
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148 | : |
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149 | :"r" (val) |
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150 | :"memory" ); |
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151 | } |
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152 | //////////////////////////////////// |
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153 | void _set_mmu_mode(unsigned int val) |
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154 | { |
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155 | asm volatile ( "mtc2 %0, $1 \n" |
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156 | : |
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157 | :"r" (val) |
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158 | :"memory" ); |
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159 | } |
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160 | //////////////////////////////////////////// |
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161 | void _set_mmu_dcache_inval(unsigned int val) |
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162 | { |
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163 | asm volatile ( "mtc2 %0, $7 \n" |
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164 | : |
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165 | :"r" (val) |
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166 | :"memory" ); |
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167 | } |
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168 | |
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169 | |
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170 | //////////////////////////////////////////////////////////////////////////// |
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171 | // Physical addressing related functions |
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172 | //////////////////////////////////////////////////////////////////////////// |
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173 | |
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174 | //////////////////////////////////////////////////////////////////////////// |
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175 | // This function makes a physical read access to a 32 bits word in memory, |
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176 | // after a temporary DTLB de-activation and paddr extension. |
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177 | //////////////////////////////////////////////////////////////////////////// |
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178 | unsigned int _physical_read( unsigned long long paddr ) |
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179 | { |
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180 | unsigned int value; |
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181 | unsigned int lsb = (unsigned int) paddr; |
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182 | unsigned int msb = (unsigned int) (paddr >> 32); |
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183 | unsigned int sr; |
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184 | |
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185 | _it_disable(&sr); |
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186 | |
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187 | asm volatile( "mfc2 $2, $1 \n" /* $2 <= MMU_MODE */ |
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188 | "andi $3, $2, 0xb \n" |
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189 | "mtc2 $3, $1 \n" /* DTLB off */ |
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190 | |
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191 | "mtc2 %2, $24 \n" /* PADDR_EXT <= msb */ |
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192 | "lw %0, 0(%1) \n" /* value <= *paddr */ |
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193 | "mtc2 $0, $24 \n" /* PADDR_EXT <= 0 */ |
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194 | |
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195 | "mtc2 $2, $1 \n" /* restore MMU_MODE */ |
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196 | : "=r" (value) |
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197 | : "r" (lsb), "r" (msb) |
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198 | : "$2", "$3" ); |
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199 | |
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200 | _it_restore(&sr); |
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201 | return value; |
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202 | } |
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203 | //////////////////////////////////////////////////////////////////////////// |
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204 | // This function makes a physical write access to a 32 bits word in memory, |
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205 | // after a temporary DTLB de-activation and paddr extension. |
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206 | //////////////////////////////////////////////////////////////////////////// |
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207 | void _physical_write( unsigned long long paddr, |
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208 | unsigned int value ) |
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209 | { |
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210 | unsigned int lsb = (unsigned int)paddr; |
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211 | unsigned int msb = (unsigned int)(paddr >> 32); |
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212 | unsigned int sr; |
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213 | |
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214 | _it_disable(&sr); |
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215 | |
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216 | asm volatile( "mfc2 $2, $1 \n" /* $2 <= MMU_MODE */ |
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217 | "andi $3, $2, 0xb \n" |
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218 | "mtc2 $3, $1 \n" /* DTLB off */ |
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219 | |
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220 | "mtc2 %2, $24 \n" /* PADDR_EXT <= msb */ |
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221 | "sw %0, 0(%1) \n" /* *paddr <= value */ |
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222 | "mtc2 $0, $24 \n" /* PADDR_EXT <= 0 */ |
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223 | |
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224 | "mtc2 $2, $1 \n" /* restore MMU_MODE */ |
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225 | "sync \n" |
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226 | : |
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227 | : "r" (value), "r" (lsb), "r" (msb) |
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228 | : "$2", "$3" ); |
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229 | |
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230 | _it_restore(&sr); |
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231 | } |
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232 | |
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233 | //////////////////////////////////////////////////////////////////////////// |
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234 | // This function makes a physical read access to a 64 bits word in memory, |
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235 | // after a temporary DTLB de-activation and paddr extension. |
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236 | //////////////////////////////////////////////////////////////////////////// |
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237 | unsigned long long _physical_read_ull( unsigned long long paddr ) |
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238 | { |
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239 | unsigned int data_lsb; |
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240 | unsigned int data_msb; |
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241 | unsigned int addr_lsb = (unsigned int) paddr; |
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242 | unsigned int addr_msb = (unsigned int) (paddr >> 32); |
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243 | unsigned int sr; |
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244 | |
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245 | _it_disable(&sr); |
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246 | |
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247 | asm volatile( "mfc2 $2, $1 \n" /* $2 <= MMU_MODE */ |
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248 | "andi $3, $2, 0xb \n" |
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249 | "mtc2 $3, $1 \n" /* DTLB off */ |
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250 | |
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251 | "mtc2 %3, $24 \n" /* PADDR_EXT <= msb */ |
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252 | "lw %0, 0(%2) \n" /* data_lsb <= *paddr */ |
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253 | "lw %1, 4(%2) \n" /* data_msb <= *paddr+4 */ |
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254 | "mtc2 $0, $24 \n" /* PADDR_EXT <= 0 */ |
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255 | |
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256 | "mtc2 $2, $1 \n" /* restore MMU_MODE */ |
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257 | : "=r" (data_lsb), "=r"(data_msb) |
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258 | : "r" (addr_lsb), "r" (addr_msb) |
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259 | : "$2", "$3" ); |
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260 | |
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261 | _it_restore(&sr); |
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262 | |
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263 | return ( (((unsigned long long)data_msb)<<32) + |
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264 | (((unsigned long long)data_lsb)) ); |
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265 | } |
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266 | |
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267 | //////////////////////////////////////////////////////////////////////////// |
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268 | // This function makes a physical write access to a 64 bits word in memory, |
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269 | // after a temporary DTLB de-activation and paddr extension. |
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270 | //////////////////////////////////////////////////////////////////////////// |
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271 | void _physical_write_ull( unsigned long long paddr, |
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272 | unsigned long long value ) |
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273 | { |
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274 | unsigned int addr_lsb = (unsigned int)paddr; |
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275 | unsigned int addr_msb = (unsigned int)(paddr >> 32); |
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276 | unsigned int data_lsb = (unsigned int)value; |
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277 | unsigned int data_msb = (unsigned int)(value >> 32); |
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278 | unsigned int sr; |
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279 | |
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280 | _it_disable(&sr); |
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281 | |
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282 | asm volatile( "mfc2 $2, $1 \n" /* $2 <= MMU_MODE */ |
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283 | "andi $3, $2, 0xb \n" |
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284 | "mtc2 $3, $1 \n" /* DTLB off */ |
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285 | |
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286 | "mtc2 %3, $24 \n" /* PADDR_EXT <= msb */ |
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287 | "sw %0, 0(%2) \n" /* *paddr <= value */ |
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288 | "sw %1, 4(%2) \n" /* *paddr+4 <= value */ |
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289 | "mtc2 $0, $24 \n" /* PADDR_EXT <= 0 */ |
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290 | |
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291 | "mtc2 $2, $1 \n" /* restore MMU_MODE */ |
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292 | "sync \n" |
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293 | : |
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294 | : "r" (data_lsb), "r" (data_msb), "r" (addr_lsb), "r" (addr_msb) |
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295 | : "$2", "$3" ); |
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296 | |
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297 | _it_restore(&sr); |
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298 | } |
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299 | |
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300 | /////////////////////////////////////////////////////////////////////////////////// |
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301 | // This function makes a memcpy from a source buffer to a destination buffer |
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302 | // using physical addresses, after a temporary DTLB de-activation. |
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303 | // source and destination buffers must be word aligned, and size must be |
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304 | // multiple of 4 bytes. |
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305 | /////////////////////////////////////////////////////////////////////////////////// |
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306 | void _physical_memcpy( unsigned long long dst_paddr, // dest buffer paddr |
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307 | unsigned long long src_paddr, // source buffer paddr |
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308 | unsigned int size ) // bytes |
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309 | { |
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310 | // check alignment constraints |
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311 | if ( (dst_paddr & 3) || (src_paddr & 3) || (size & 3) ) |
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312 | { |
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313 | _printf("\n[GIET ERROR] in _physical_memcpy() : buffer unaligned\n"); |
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314 | _exit(); |
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315 | } |
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316 | |
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317 | unsigned int src_lsb = (unsigned int)src_paddr; |
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318 | unsigned int src_msb = (unsigned int)(src_paddr >> 32); |
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319 | unsigned int dst_lsb = (unsigned int)dst_paddr; |
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320 | unsigned int dst_msb = (unsigned int)(dst_paddr >> 32); |
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321 | unsigned int iter = size>>2; |
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322 | unsigned int data; |
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323 | unsigned int sr; |
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324 | |
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325 | _it_disable(&sr); |
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326 | |
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327 | asm volatile( "mfc2 $2, $1 \n" /* $2 <= current MMU_MODE */ |
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328 | "andi $3, $2, 0xb \n" /* $3 <= new MMU_MODE */ |
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329 | "mtc2 $3, $1 \n" /* DTLB off */ |
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330 | |
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331 | "move $4, %5 \n" /* $4 < iter */ |
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332 | "move $5, %1 \n" /* $5 < src_lsb */ |
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333 | "move $6, %3 \n" /* $6 < src_lsb */ |
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334 | |
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335 | "ph_memcpy_loop: \n" |
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336 | "mtc2 %2, $24 \n" /* PADDR_EXT <= src_msb */ |
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337 | "lw %0, 0($5) \n" /* data <= *src_paddr */ |
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338 | "mtc2 %4, $24 \n" /* PADDR_EXT <= dst_msb */ |
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339 | "sw %0, 0($6) \n" /* *dst_paddr <= data */ |
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340 | |
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341 | "addi $4, $4, -1 \n" /* iter = iter - 1 */ |
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342 | "addi $5, $5, 4 \n" /* src_lsb += 4 */ |
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343 | "addi $6, $6, 4 \n" /* dst_lsb += 4 */ |
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344 | "bne $4, $0, ph_memcpy_loop \n" |
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345 | "nop \n" |
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346 | |
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347 | "mtc2 $0, $24 \n" /* PADDR_EXT <= 0 */ |
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348 | "mtc2 $2, $1 \n" /* restore MMU_MODE */ |
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349 | : "=r" (data) |
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350 | : "r" (src_lsb), "r" (src_msb), "r" (dst_lsb), "r"(dst_msb), "r"(iter) |
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351 | : "$2", "$3", "$4", "$5", "$6" ); |
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352 | |
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353 | _it_restore(&sr); |
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354 | } |
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355 | |
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356 | /////////////////////////////////////////////////////////////////////////////////// |
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357 | // This function is used by several drivers (_xxx_set_register() function) |
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358 | // If the MMU is not activated, the virtual address is extended using |
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359 | // X_IO and Y_IO to reach the cluster_io. |
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360 | /////////////////////////////////////////////////////////////////////////////////// |
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361 | void _io_extended_write( unsigned int* vaddr, |
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362 | unsigned int value ) |
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363 | { |
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364 | unsigned long long paddr; |
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365 | |
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366 | if ( _get_mmu_mode() & 0x4 ) // MMU activated : use virtual address |
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367 | { |
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368 | *vaddr = value; |
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369 | } |
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370 | else // use paddr extension for IO |
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371 | { |
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372 | paddr = (unsigned long long)(unsigned int)vaddr + |
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373 | (((unsigned long long)((X_IO<<Y_WIDTH) + Y_IO))<<32); |
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374 | _physical_write( paddr, value ); |
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375 | } |
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376 | asm volatile("sync" ::: "memory"); |
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377 | } |
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378 | |
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379 | /////////////////////////////////////////////////////////////////////////////////// |
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380 | // This function is used by all drivers (_xxx_get_register() function) |
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381 | // If the MMU is not activated, the virtual address is extended using |
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382 | // X_IO and Y_IO to reach the cluster_io. |
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383 | /////////////////////////////////////////////////////////////////////////////////// |
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384 | unsigned int _io_extended_read( unsigned int* vaddr ) |
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385 | { |
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386 | unsigned long long paddr; |
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387 | |
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388 | if ( _get_mmu_mode() & 0x4 ) // MMU activated : use virtual address |
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389 | { |
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390 | return *(volatile unsigned int*)vaddr; |
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391 | } |
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392 | else // use paddr extension for IO |
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393 | { |
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394 | paddr = (unsigned long long)(unsigned int)vaddr + |
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395 | (((unsigned long long)((X_IO<<Y_WIDTH) + Y_IO))<<32); |
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396 | return _physical_read( paddr ); |
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397 | } |
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398 | } |
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399 | |
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400 | /////////////////////////////////////////////////////////////////////////////////// |
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401 | // Locks access functions |
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402 | /////////////////////////////////////////////////////////////////////////////////// |
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403 | |
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404 | /////////////////////////////////////////////////////////////////////////////////// |
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405 | // Takes a lock with a blocking ll/sc atomic access. |
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406 | // When the cache coherence is granted by the hardware, |
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407 | // the first read is a standard (cacheable) lw, as the local copy |
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408 | // can be polled when the lock is already taken by another task, reducing |
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409 | // trafic on the interconnect. When the lock is released by the owner task, |
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410 | // the local copy is updated or invalidated by the coherence protocol. |
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411 | // If there is no hardware cache coherence a random delay is introduced |
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412 | // betwween two successive retry. |
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413 | /////////////////////////////////////////////////////////////////////////////////// |
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414 | void _get_lock(giet_lock_t* lock) |
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415 | { |
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416 | register unsigned int* plock = &(lock->value); |
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417 | |
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418 | #if NO_HARD_CC |
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419 | |
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420 | register unsigned int delay = (_get_proctime() ^ _get_procid() << 4) & 0xFF; |
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421 | if (delay == 0) delay = 0x80; |
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422 | |
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423 | asm volatile ( |
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424 | "_lock_llsc: \n" |
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425 | " ll $2, 0(%0) \n" /* $2 <= lock current value */ |
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426 | " bnez $2, _lock_delay \n" /* delay if lock already taken */ |
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427 | " li $3, 1 \n" /* $3 <= argument for sc */ |
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428 | " sc $3, 0(%0) \n" /* try to set lock */ |
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429 | " bnez $3, _lock_ok \n" /* exit if atomic */ |
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430 | " _lock_delay: \n" |
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431 | " move $4, %1 \n" /* $4 <= delay */ |
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432 | " _lock_loop: \n" |
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433 | " addi $4, $4, -1 \n" /* $4 <= $4 - 1 */ |
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434 | " bnez $4, _lock_loop \n" /* test end delay */ |
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435 | " nop \n" |
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436 | " j _lock_llsc \n" /* retry */ |
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437 | " nop \n" |
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438 | " _lock_ok: \n" |
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439 | : |
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440 | :"r"(plock), "r"(delay) |
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441 | :"$2", "$3", "$4", "memory"); |
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442 | #else |
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443 | |
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444 | asm volatile ( |
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445 | "_lock_llsc: \n" |
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446 | " lw $2, 0(%0) \n" /* $2 <= lock current value */ |
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447 | " bnez $2, _lock_llsc \n" /* retry if lock already taken */ |
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448 | " nop \n" |
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449 | " ll $2, 0(%0) \n" /* ll_buffer <= lock current value */ |
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450 | " bnez $2, _lock_llsc \n" /* retry if lock already taken */ |
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451 | " li $3, 1 \n" /* $3 <= argument for sc */ |
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452 | " sc $3, 0(%0) \n" /* try to set lock */ |
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453 | " beqz $3, _lock_llsc \n" /* retry if sc failure */ |
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454 | " nop \n" |
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455 | : |
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456 | :"r"(plock) |
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457 | :"$2", "$3", "memory"); |
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458 | #endif |
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459 | |
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460 | } |
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461 | |
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462 | /////////////////////////////////////////////////////////////////////////////////// |
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463 | // Release a previouly taken lock. |
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464 | /////////////////////////////////////////////////////////////////////////////////// |
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465 | void _release_lock(giet_lock_t* lock) |
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466 | { |
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467 | asm volatile ( "sync\n" ::: "memory" ); |
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468 | // sync is necessary because of the TSAR consistency model |
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469 | lock->value = 0; |
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470 | } |
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471 | |
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472 | /////////////////////////////////////////////////////////////////////////////////// |
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473 | // Access functions to system terminal TTY0 |
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474 | /////////////////////////////////////////////////////////////////////////////////// |
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475 | |
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476 | /////////////////////////////////////////////////////////////////////////////////// |
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477 | // Display "string" argument on TTY0. |
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478 | // It uses the low level access functions from TTY driver, using a busy waiting |
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479 | // policy if TTY buffer is full. |
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480 | // The exclusive access lock should be taken by the caller. |
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481 | /////////////////////////////////////////////////////////////////////////////////// |
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482 | void _puts( char* string ) |
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483 | { |
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484 | unsigned int n = 0; |
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485 | |
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486 | while ( string[n] > 0 ) |
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487 | { |
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488 | // test status register |
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489 | while ( (_tty_get_register( 0, TTY_STATUS ) & 0x2) ); |
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490 | |
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491 | // write one byte |
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492 | if ( string[n] == '\n') { |
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493 | _tty_set_register( 0, TTY_WRITE, (unsigned int)'\r' ); |
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494 | } |
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495 | _tty_set_register( 0, TTY_WRITE, (unsigned int)string[n] ); |
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496 | n++; |
---|
497 | } |
---|
498 | } |
---|
499 | |
---|
500 | /////////////////////////////////////////////////////////////////////////////////// |
---|
501 | // Display a 32 bits unsigned int as an hexadecimal string on TTY0. |
---|
502 | /////////////////////////////////////////////////////////////////////////////////// |
---|
503 | void _putx( unsigned int val ) |
---|
504 | { |
---|
505 | static const char HexaTab[] = "0123456789ABCDEF"; |
---|
506 | char buf[11]; |
---|
507 | unsigned int c; |
---|
508 | |
---|
509 | buf[0] = '0'; |
---|
510 | buf[1] = 'x'; |
---|
511 | buf[10] = 0; |
---|
512 | |
---|
513 | for (c = 0; c < 8; c++) |
---|
514 | { |
---|
515 | buf[9 - c] = HexaTab[val & 0xF]; |
---|
516 | val = val >> 4; |
---|
517 | } |
---|
518 | _puts( buf ); |
---|
519 | } |
---|
520 | |
---|
521 | /////////////////////////////////////////////////////////////////////////////////// |
---|
522 | // Display a 64 bits unsigned long as an hexadecimal string on TTY0. |
---|
523 | /////////////////////////////////////////////////////////////////////////////////// |
---|
524 | void _putl( unsigned long long val ) |
---|
525 | { |
---|
526 | static const char HexaTab[] = "0123456789ABCDEF"; |
---|
527 | char buf[19]; |
---|
528 | unsigned int c; |
---|
529 | |
---|
530 | buf[0] = '0'; |
---|
531 | buf[1] = 'x'; |
---|
532 | buf[18] = 0; |
---|
533 | |
---|
534 | for (c = 0; c < 16; c++) |
---|
535 | { |
---|
536 | buf[17 - c] = HexaTab[(unsigned int)val & 0xF]; |
---|
537 | val = val >> 4; |
---|
538 | } |
---|
539 | _puts( buf ); |
---|
540 | } |
---|
541 | |
---|
542 | /////////////////////////////////////////////////////////////////////////////////// |
---|
543 | // Display a 32 bits unsigned int as a decimal string on TTY0. |
---|
544 | /////////////////////////////////////////////////////////////////////////////////// |
---|
545 | void _putd( unsigned int val ) |
---|
546 | { |
---|
547 | static const char DecTab[] = "0123456789"; |
---|
548 | char buf[11]; |
---|
549 | unsigned int i; |
---|
550 | unsigned int first = 0; |
---|
551 | |
---|
552 | buf[10] = 0; |
---|
553 | |
---|
554 | for (i = 0; i < 10; i++) |
---|
555 | { |
---|
556 | if ((val != 0) || (i == 0)) |
---|
557 | { |
---|
558 | buf[9 - i] = DecTab[val % 10]; |
---|
559 | first = 9 - i; |
---|
560 | } |
---|
561 | else |
---|
562 | { |
---|
563 | break; |
---|
564 | } |
---|
565 | val /= 10; |
---|
566 | } |
---|
567 | _puts( &buf[first] ); |
---|
568 | } |
---|
569 | |
---|
570 | /////////////////////////////////////////////////////////////////////////////////// |
---|
571 | // Display a format on TTY0. |
---|
572 | // To provide an atomic display, this function takes the lock protecting |
---|
573 | // exclusive access to TTY0, entering a critical section until the lock |
---|
574 | // is released. |
---|
575 | // Only a limited number of formats are supported: |
---|
576 | // - %d : 32 bits signed decimal |
---|
577 | // - %u : 32 bits unsigned decimal |
---|
578 | // - %x : 32 bits unsigned hexa |
---|
579 | // - %l : 64 bits unsigned hexa |
---|
580 | // - %c : char |
---|
581 | // - %s : string |
---|
582 | /////////////////////////////////////////////////////////////////////////////////// |
---|
583 | void _printf( char * format, ... ) |
---|
584 | { |
---|
585 | va_list ap; |
---|
586 | va_start(ap, format); |
---|
587 | unsigned int save_sr; // to save SR value in critical section |
---|
588 | |
---|
589 | // get TTY0 lock |
---|
590 | _tty_get_lock( 0, &save_sr ); |
---|
591 | |
---|
592 | printf_text: |
---|
593 | |
---|
594 | while (*format) |
---|
595 | { |
---|
596 | unsigned int i; |
---|
597 | for (i = 0 ; format[i] && (format[i] != '%') ; i++); |
---|
598 | if (i) |
---|
599 | { |
---|
600 | if ( _tty_write( format, i, 0 ) != i ) goto return_error; |
---|
601 | format += i; |
---|
602 | } |
---|
603 | if (*format == '%') |
---|
604 | { |
---|
605 | format++; |
---|
606 | goto printf_arguments; |
---|
607 | } |
---|
608 | } |
---|
609 | |
---|
610 | // release TTY0 lock |
---|
611 | _tty_release_lock( 0, &save_sr ); |
---|
612 | |
---|
613 | va_end(ap); |
---|
614 | return; |
---|
615 | |
---|
616 | printf_arguments: |
---|
617 | |
---|
618 | { |
---|
619 | char buf[20]; |
---|
620 | char * pbuf; |
---|
621 | unsigned int len = 0; |
---|
622 | static const char HexaTab[] = "0123456789ABCDEF"; |
---|
623 | unsigned int i; |
---|
624 | |
---|
625 | switch (*format++) |
---|
626 | { |
---|
627 | case ('c'): /* char conversion */ |
---|
628 | { |
---|
629 | int val = va_arg( ap, int ); |
---|
630 | len = 1; |
---|
631 | buf[0] = val; |
---|
632 | pbuf = &buf[0]; |
---|
633 | break; |
---|
634 | } |
---|
635 | case ('d'): /* 32 bits decimal signed */ |
---|
636 | { |
---|
637 | int val = va_arg( ap, int ); |
---|
638 | if (val < 0) |
---|
639 | { |
---|
640 | val = -val; |
---|
641 | if ( _tty_write( "-" , 1, 0 ) != 1 ) goto return_error; |
---|
642 | } |
---|
643 | for(i = 0; i < 10; i++) |
---|
644 | { |
---|
645 | buf[9 - i] = HexaTab[val % 10]; |
---|
646 | if (!(val /= 10)) break; |
---|
647 | } |
---|
648 | len = i + 1; |
---|
649 | pbuf = &buf[9 - i]; |
---|
650 | break; |
---|
651 | } |
---|
652 | case ('u'): /* 32 bits decimal unsigned */ |
---|
653 | { |
---|
654 | unsigned int val = va_arg( ap, unsigned int ); |
---|
655 | for(i = 0; i < 10; i++) |
---|
656 | { |
---|
657 | buf[9 - i] = HexaTab[val % 10]; |
---|
658 | if (!(val /= 10)) break; |
---|
659 | } |
---|
660 | len = i + 1; |
---|
661 | pbuf = &buf[9 - i]; |
---|
662 | break; |
---|
663 | } |
---|
664 | case ('x'): /* 32 bits hexadecimal unsigned */ |
---|
665 | { |
---|
666 | unsigned int val = va_arg( ap, unsigned int ); |
---|
667 | if ( _tty_write( "0x" , 2, 0 ) != 2 ) goto return_error; |
---|
668 | for(i = 0; i < 8; i++) |
---|
669 | { |
---|
670 | buf[7 - i] = HexaTab[val % 16]; |
---|
671 | if (!(val /= 16)) break; |
---|
672 | } |
---|
673 | len = i + 1; |
---|
674 | pbuf = &buf[7 - i]; |
---|
675 | break; |
---|
676 | } |
---|
677 | case ('l'): /* 64 bits hexadecimal unsigned */ |
---|
678 | { |
---|
679 | unsigned long long val = va_arg( ap, unsigned long long ); |
---|
680 | if ( _tty_write( "0x" , 2, 0 ) != 2 ) goto return_error; |
---|
681 | for(i = 0; i < 16; i++) |
---|
682 | { |
---|
683 | buf[15 - i] = HexaTab[val % 16]; |
---|
684 | if (!(val /= 16)) break; |
---|
685 | } |
---|
686 | len = i + 1; |
---|
687 | pbuf = &buf[15 - i]; |
---|
688 | break; |
---|
689 | } |
---|
690 | case ('s'): /* string */ |
---|
691 | { |
---|
692 | char* str = va_arg( ap, char* ); |
---|
693 | while (str[len]) |
---|
694 | { |
---|
695 | len++; |
---|
696 | } |
---|
697 | pbuf = str; |
---|
698 | break; |
---|
699 | } |
---|
700 | default: |
---|
701 | goto return_error; |
---|
702 | } |
---|
703 | |
---|
704 | if ( _tty_write( pbuf, len, 0 ) != len ) goto return_error; |
---|
705 | |
---|
706 | goto printf_text; |
---|
707 | } |
---|
708 | |
---|
709 | return_error: |
---|
710 | |
---|
711 | { |
---|
712 | unsigned int procid = _get_procid(); |
---|
713 | unsigned int lpid = procid % NB_PROCS_MAX; |
---|
714 | unsigned int cluster_xy = procid / NB_PROCS_MAX; |
---|
715 | unsigned int x = cluster_xy >> Y_WIDTH; |
---|
716 | unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1); |
---|
717 | |
---|
718 | _puts("\n\n[GIET ERROR] in _printf() for processor["); |
---|
719 | _putd( x ); |
---|
720 | _puts(","); |
---|
721 | _putd( y ); |
---|
722 | _puts(","); |
---|
723 | _putd( lpid ); |
---|
724 | _puts("]\n"); |
---|
725 | |
---|
726 | // release TTY0 lock |
---|
727 | _tty_release_lock( 0, &save_sr ); |
---|
728 | |
---|
729 | _exit(); |
---|
730 | } |
---|
731 | } |
---|
732 | |
---|
733 | /////////////////////////////////////////////////////////////////////////////////// |
---|
734 | // Get a character from TTY0. |
---|
735 | /////////////////////////////////////////////////////////////////////////////////// |
---|
736 | void _getc( char* byte ) |
---|
737 | { |
---|
738 | // test status register |
---|
739 | while ( _tty_get_register( 0, TTY_STATUS ) == 0 ); |
---|
740 | |
---|
741 | // read one byte |
---|
742 | *byte = (char)_tty_get_register( 0, TTY_READ ); |
---|
743 | } |
---|
744 | |
---|
745 | |
---|
746 | ////////////////////////////////////////////////////////////////////////////// |
---|
747 | // Scheduler and tasks context access functions |
---|
748 | ////////////////////////////////////////////////////////////////////////////// |
---|
749 | |
---|
750 | ////////////////////////////////////////////////////////////////////////////// |
---|
751 | // Returns index of the currently running task from the processor scheduler. |
---|
752 | ////////////////////////////////////////////////////////////////////////////// |
---|
753 | unsigned int _get_current_task_id() |
---|
754 | { |
---|
755 | static_scheduler_t * psched = (static_scheduler_t *) _get_sched(); |
---|
756 | return (unsigned int) (psched->current); |
---|
757 | } |
---|
758 | //////////////////////////////////////////////////////////////////////////////////// |
---|
759 | // This function returns the content of a context slot |
---|
760 | // for a task identified by the ltid argument (local task index), |
---|
761 | // and the gpid argument (global processor index) |
---|
762 | //////////////////////////////////////////////////////////////////////////////////// |
---|
763 | unsigned int _get_task_slot( unsigned int gpid, |
---|
764 | unsigned int ltid, |
---|
765 | unsigned int slot ) |
---|
766 | { |
---|
767 | static_scheduler_t* psched = (static_scheduler_t*)_schedulers[gpid]; |
---|
768 | return psched->context[ltid][slot]; |
---|
769 | } |
---|
770 | //////////////////////////////////////////////////////////////////////////////////// |
---|
771 | // This function updates the content of a context slot |
---|
772 | // for any task identified by the ltid argument (local task index), |
---|
773 | // and the gpid argument (global processor index) |
---|
774 | //////////////////////////////////////////////////////////////////////////////////// |
---|
775 | void _set_task_slot( unsigned int gpid, |
---|
776 | unsigned int ltid, |
---|
777 | unsigned int slot, |
---|
778 | unsigned int value ) |
---|
779 | { |
---|
780 | static_scheduler_t* psched = (static_scheduler_t*)_schedulers[gpid]; |
---|
781 | psched->context[ltid][slot] = value; |
---|
782 | } |
---|
783 | //////////////////////////////////////////////////////////////////////////////////// |
---|
784 | // This function returns the content of a context slot |
---|
785 | // for the running task (defined by the scheduler current field). |
---|
786 | //////////////////////////////////////////////////////////////////////////////////// |
---|
787 | unsigned int _get_context_slot( unsigned int slot ) |
---|
788 | { |
---|
789 | static_scheduler_t* psched = (static_scheduler_t*)_get_sched(); |
---|
790 | unsigned int task_id = psched->current; |
---|
791 | return psched->context[task_id][slot]; |
---|
792 | } |
---|
793 | //////////////////////////////////////////////////////////////////////////////////// |
---|
794 | // This function updates the content of a context slot for the running task. |
---|
795 | //////////////////////////////////////////////////////////////////////////////////// |
---|
796 | void _set_context_slot( unsigned int slot, |
---|
797 | unsigned int value ) |
---|
798 | { |
---|
799 | static_scheduler_t* psched = (static_scheduler_t*)_get_sched(); |
---|
800 | unsigned int task_id = psched->current; |
---|
801 | psched->context[task_id][slot] = value; |
---|
802 | } |
---|
803 | |
---|
804 | ///////////////////////////////////////////////////////////////////////////// |
---|
805 | // Access functions to mapping_info data structure |
---|
806 | ///////////////////////////////////////////////////////////////////////////// |
---|
807 | mapping_cluster_t * _get_cluster_base(mapping_header_t * header) |
---|
808 | { |
---|
809 | return (mapping_cluster_t *) ((char *) header + |
---|
810 | MAPPING_HEADER_SIZE); |
---|
811 | } |
---|
812 | ///////////////////////////////////////////////////////////////////////////// |
---|
813 | mapping_pseg_t * _get_pseg_base(mapping_header_t * header) |
---|
814 | { |
---|
815 | return (mapping_pseg_t *) ((char *) header + |
---|
816 | MAPPING_HEADER_SIZE + |
---|
817 | MAPPING_CLUSTER_SIZE * X_SIZE * Y_SIZE); |
---|
818 | } |
---|
819 | ///////////////////////////////////////////////////////////////////////////// |
---|
820 | mapping_vspace_t * _get_vspace_base(mapping_header_t * header) |
---|
821 | { |
---|
822 | return (mapping_vspace_t *) ((char *) header + |
---|
823 | MAPPING_HEADER_SIZE + |
---|
824 | MAPPING_CLUSTER_SIZE * X_SIZE * Y_SIZE + |
---|
825 | MAPPING_PSEG_SIZE * header->psegs); |
---|
826 | } |
---|
827 | ///////////////////////////////////////////////////////////////////////////// |
---|
828 | mapping_vseg_t * _get_vseg_base(mapping_header_t * header) |
---|
829 | { |
---|
830 | return (mapping_vseg_t *) ((char *) header + |
---|
831 | MAPPING_HEADER_SIZE + |
---|
832 | MAPPING_CLUSTER_SIZE * X_SIZE * Y_SIZE + |
---|
833 | MAPPING_PSEG_SIZE * header->psegs + |
---|
834 | MAPPING_VSPACE_SIZE * header->vspaces); |
---|
835 | } |
---|
836 | ///////////////////////////////////////////////////////////////////////////// |
---|
837 | mapping_vobj_t * _get_vobj_base(mapping_header_t * header) |
---|
838 | { |
---|
839 | return (mapping_vobj_t *) ((char *) header + |
---|
840 | MAPPING_HEADER_SIZE + |
---|
841 | MAPPING_CLUSTER_SIZE * X_SIZE * Y_SIZE + |
---|
842 | MAPPING_PSEG_SIZE * header->psegs + |
---|
843 | MAPPING_VSPACE_SIZE * header->vspaces + |
---|
844 | MAPPING_VSEG_SIZE * header->vsegs ); |
---|
845 | } |
---|
846 | ///////////////////////////////////////////////////////////////////////////// |
---|
847 | mapping_task_t * _get_task_base(mapping_header_t * header) |
---|
848 | { |
---|
849 | return (mapping_task_t *) ((char *) header + |
---|
850 | MAPPING_HEADER_SIZE + |
---|
851 | MAPPING_CLUSTER_SIZE * X_SIZE * Y_SIZE + |
---|
852 | MAPPING_PSEG_SIZE * header->psegs + |
---|
853 | MAPPING_VSPACE_SIZE * header->vspaces + |
---|
854 | MAPPING_VOBJ_SIZE * header->vobjs + |
---|
855 | MAPPING_VSEG_SIZE * header->vsegs); |
---|
856 | } |
---|
857 | ///////////////////////////////////////////////////////////////////////////// |
---|
858 | mapping_proc_t *_get_proc_base(mapping_header_t * header) |
---|
859 | { |
---|
860 | return (mapping_proc_t *) ((char *) header + |
---|
861 | MAPPING_HEADER_SIZE + |
---|
862 | MAPPING_CLUSTER_SIZE * X_SIZE * Y_SIZE + |
---|
863 | MAPPING_PSEG_SIZE * header->psegs + |
---|
864 | MAPPING_VSPACE_SIZE * header->vspaces + |
---|
865 | MAPPING_VSEG_SIZE * header->vsegs + |
---|
866 | MAPPING_VOBJ_SIZE * header->vobjs + |
---|
867 | MAPPING_TASK_SIZE * header->tasks); |
---|
868 | } |
---|
869 | ///////////////////////////////////////////////////////////////////////////// |
---|
870 | mapping_irq_t *_get_irq_base(mapping_header_t * header) |
---|
871 | { |
---|
872 | return (mapping_irq_t *) ((char *) header + |
---|
873 | MAPPING_HEADER_SIZE + |
---|
874 | MAPPING_CLUSTER_SIZE * X_SIZE * Y_SIZE + |
---|
875 | MAPPING_PSEG_SIZE * header->psegs + |
---|
876 | MAPPING_VSPACE_SIZE * header->vspaces + |
---|
877 | MAPPING_VSEG_SIZE * header->vsegs + |
---|
878 | MAPPING_VOBJ_SIZE * header->vobjs + |
---|
879 | MAPPING_TASK_SIZE * header->tasks + |
---|
880 | MAPPING_PROC_SIZE * header->procs); |
---|
881 | } |
---|
882 | ///////////////////////////////////////////////////////////////////////////// |
---|
883 | mapping_coproc_t *_get_coproc_base(mapping_header_t * header) |
---|
884 | { |
---|
885 | return (mapping_coproc_t *) ((char *) header + |
---|
886 | MAPPING_HEADER_SIZE + |
---|
887 | MAPPING_CLUSTER_SIZE * X_SIZE * Y_SIZE + |
---|
888 | MAPPING_PSEG_SIZE * header->psegs + |
---|
889 | MAPPING_VSPACE_SIZE * header->vspaces + |
---|
890 | MAPPING_VOBJ_SIZE * header->vobjs + |
---|
891 | MAPPING_VSEG_SIZE * header->vsegs + |
---|
892 | MAPPING_TASK_SIZE * header->tasks + |
---|
893 | MAPPING_PROC_SIZE * header->procs + |
---|
894 | MAPPING_IRQ_SIZE * header->irqs); |
---|
895 | } |
---|
896 | /////////////////////////////////////////////////////////////////////////////////// |
---|
897 | mapping_cp_port_t *_get_cp_port_base(mapping_header_t * header) |
---|
898 | { |
---|
899 | return (mapping_cp_port_t *) ((char *) header + |
---|
900 | MAPPING_HEADER_SIZE + |
---|
901 | MAPPING_CLUSTER_SIZE * X_SIZE * Y_SIZE + |
---|
902 | MAPPING_PSEG_SIZE * header->psegs + |
---|
903 | MAPPING_VSPACE_SIZE * header->vspaces + |
---|
904 | MAPPING_VOBJ_SIZE * header->vobjs + |
---|
905 | MAPPING_VSEG_SIZE * header->vsegs + |
---|
906 | MAPPING_TASK_SIZE * header->tasks + |
---|
907 | MAPPING_PROC_SIZE * header->procs + |
---|
908 | MAPPING_IRQ_SIZE * header->irqs + |
---|
909 | MAPPING_COPROC_SIZE * header->coprocs); |
---|
910 | } |
---|
911 | /////////////////////////////////////////////////////////////////////////////////// |
---|
912 | mapping_periph_t *_get_periph_base(mapping_header_t * header) |
---|
913 | { |
---|
914 | return (mapping_periph_t *) ((char *) header + |
---|
915 | MAPPING_HEADER_SIZE + |
---|
916 | MAPPING_CLUSTER_SIZE * X_SIZE * Y_SIZE + |
---|
917 | MAPPING_PSEG_SIZE * header->psegs + |
---|
918 | MAPPING_VSPACE_SIZE * header->vspaces + |
---|
919 | MAPPING_VOBJ_SIZE * header->vobjs + |
---|
920 | MAPPING_VSEG_SIZE * header->vsegs + |
---|
921 | MAPPING_TASK_SIZE * header->tasks + |
---|
922 | MAPPING_PROC_SIZE * header->procs + |
---|
923 | MAPPING_IRQ_SIZE * header->irqs + |
---|
924 | MAPPING_COPROC_SIZE * header->coprocs + |
---|
925 | MAPPING_CP_PORT_SIZE * header->cp_ports); |
---|
926 | } |
---|
927 | |
---|
928 | /////////////////////////////////////////////////////////////////////////////////// |
---|
929 | // Miscelaneous functions |
---|
930 | /////////////////////////////////////////////////////////////////////////////////// |
---|
931 | |
---|
932 | /////////////////////////////////////////////////////////////////////////////////// |
---|
933 | // This function implements a pseudo-random delay. |
---|
934 | // The val argument define approximately an exponentially increasing mean delay, |
---|
935 | // and should not be larger than 32. |
---|
936 | /////////////////////////////////////////////////////////////////////////////////// |
---|
937 | void _random_wait( unsigned int val ) |
---|
938 | { |
---|
939 | unsigned int mask = (1<<(val&0x1F))-1; |
---|
940 | unsigned int delay = (_get_proctime() ^ (_get_procid()<<4)) & mask; |
---|
941 | asm volatile( "move $3, %0 \n" |
---|
942 | "loop_nic_completed: \n" |
---|
943 | "addi $3, $3, -1 \n" |
---|
944 | "bnez $3, loop_nic_completed \n" |
---|
945 | "nop \n" |
---|
946 | : |
---|
947 | : "r" (delay) |
---|
948 | : "$3" ); |
---|
949 | } |
---|
950 | ////////////////////////////////////////////////////////////////////////////////// |
---|
951 | // This function implements an interactive break for debug. |
---|
952 | // Execution continue when typing any character on TTY0. |
---|
953 | // The "str" argument is supposed to indicate the break location. |
---|
954 | ////////////////////////////////////////////////////////////////////////////////// |
---|
955 | void _break( char* string ) |
---|
956 | { |
---|
957 | char byte; |
---|
958 | |
---|
959 | _printf("\n[GIET DEBUG] break from %s / continue ?\n", string ); |
---|
960 | _getc( &byte ); |
---|
961 | } |
---|
962 | |
---|
963 | ////////////////////////////////////////////////////////////////////////////////// |
---|
964 | // Processor suicide: infinite loop |
---|
965 | ////////////////////////////////////////////////////////////////////////////////// |
---|
966 | __attribute__((noreturn)) |
---|
967 | void _exit() |
---|
968 | { |
---|
969 | unsigned int procid = _get_procid(); |
---|
970 | unsigned int lpid = procid % NB_PROCS_MAX; |
---|
971 | unsigned int cluster_xy = procid / NB_PROCS_MAX; |
---|
972 | unsigned int x = cluster_xy >> Y_WIDTH; |
---|
973 | unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1); |
---|
974 | |
---|
975 | |
---|
976 | _printf("\n[GIET PANIC] processor[%d,%d,%d] suicide...\n", x, y, lpid ); |
---|
977 | |
---|
978 | while (1) { asm volatile ("nop"); } |
---|
979 | } |
---|
980 | /////////////////////////////////////////////////////////////////////////////////// |
---|
981 | // Compare two strings s1 & s2 (no more than n characters) |
---|
982 | /////////////////////////////////////////////////////////////////////////////////// |
---|
983 | unsigned int _strncmp( const char * s1, |
---|
984 | const char * s2, |
---|
985 | unsigned int n ) |
---|
986 | { |
---|
987 | unsigned int i; |
---|
988 | for (i = 0; i < n; i++) |
---|
989 | { |
---|
990 | if (s1[i] != s2[i]) return 1; |
---|
991 | if (s1[i] == 0) break; |
---|
992 | } |
---|
993 | return 0; |
---|
994 | } |
---|
995 | |
---|
996 | /////////////////////////////////////////////////////////////////////////////////// |
---|
997 | // Copy source string to dest string |
---|
998 | /////////////////////////////////////////////////////////////////////////////////// |
---|
999 | char* _strcpy( char* dest, char* source ) |
---|
1000 | { |
---|
1001 | if (!dest || !source) return dest; |
---|
1002 | |
---|
1003 | while (*source) |
---|
1004 | *(dest++) = *(source++); |
---|
1005 | |
---|
1006 | return dest; |
---|
1007 | } |
---|
1008 | |
---|
1009 | /////////////////////////////////////////////////////////////////////////////////// |
---|
1010 | // Invalidate all data cache lines corresponding to a memory |
---|
1011 | // buffer (identified by virtual base address and size). |
---|
1012 | /////////////////////////////////////////////////////////////////////////////////// |
---|
1013 | void _dcache_buf_invalidate( unsigned int buf_vbase, |
---|
1014 | unsigned int buf_size ) |
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1015 | { |
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1016 | unsigned int offset; |
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1017 | unsigned int tmp; |
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1018 | unsigned int line_size; // bytes |
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1019 | |
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1020 | // compute data cache line size based on config register (bits 12:10) |
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1021 | asm volatile( |
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1022 | "mfc0 %0, $16, 1" |
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1023 | : "=r" (tmp) ); |
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1024 | |
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1025 | tmp = ((tmp >> 10) & 0x7); |
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1026 | line_size = 2 << tmp; |
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1027 | |
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1028 | // iterate on cache lines |
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1029 | for ( offset = 0; offset < buf_size; offset += line_size) |
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1030 | { |
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1031 | _set_mmu_dcache_inval( buf_vbase + offset ); |
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1032 | } |
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1033 | } |
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1034 | /////////////////////////////////////////////////////////////////////////////////// |
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1035 | // This function returns the information associated to a heap : vaddr and length. |
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1036 | // - If (x < X_SIZE) and (y < Y_SIZE), it return the heap associated to any task |
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1037 | // running in cluster(x,y). |
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1038 | // - Else, it return the heap associated to the calling task. |
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1039 | // It uses the global task index (CTX_GTID_ID, unique for each giet task) and the |
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1040 | // vspace index (CTX_VSID_ID), that are defined in the calling task context |
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1041 | // to find the vobj_id containing the heap. |
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1042 | // Return 0 if success. Return non zero if not found. |
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1043 | /////////////////////////////////////////////////////////////////////////////////// |
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1044 | unsigned int _heap_info( unsigned int* vaddr, |
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1045 | unsigned int* length, |
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1046 | unsigned int x, |
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1047 | unsigned int y ) |
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1048 | { |
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1049 | mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE; |
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1050 | mapping_task_t * tasks = _get_task_base(header); |
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1051 | mapping_vobj_t * vobjs = _get_vobj_base(header); |
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1052 | mapping_vspace_t * vspaces = _get_vspace_base(header); |
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1053 | |
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1054 | unsigned int task_id; |
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1055 | unsigned int vspace_id; |
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1056 | unsigned int vobj_id = 0xFFFFFFFF; |
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1057 | |
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1058 | // searching the heap vobj_id |
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1059 | if ( (x < X_SIZE) && (y < Y_SIZE) ) // searching a task in cluster(x,y) |
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1060 | { |
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1061 | // get vspace global index |
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1062 | vspace_id = _get_context_slot(CTX_VSID_ID); |
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1063 | |
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1064 | // scan all tasks in vspace |
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1065 | unsigned int min = vspaces[vspace_id].task_offset ; |
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1066 | unsigned int max = min + vspaces[vspace_id].tasks ; |
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1067 | for ( task_id = min ; task_id < max ; task_id++ ) |
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1068 | { |
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1069 | if ( tasks[task_id].clusterid == (x * Y_SIZE + y) ) |
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1070 | { |
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1071 | vobj_id = tasks[task_id].heap_vobj_id; |
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1072 | if ( vobj_id != 0xFFFFFFFF ) break; |
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1073 | } |
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1074 | } |
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1075 | } |
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1076 | else // searching in the calling task |
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1077 | { |
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1078 | task_id = _get_context_slot(CTX_GTID_ID); |
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1079 | vobj_id = tasks[task_id].heap_vobj_id; |
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1080 | } |
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1081 | |
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1082 | // analysing the vobj_id |
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1083 | if ( vobj_id != 0xFFFFFFFF ) |
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1084 | { |
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1085 | *vaddr = vobjs[vobj_id].vbase; |
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1086 | *length = vobjs[vobj_id].length; |
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1087 | return 0; |
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1088 | } |
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1089 | else |
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1090 | { |
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1091 | *vaddr = 0; |
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1092 | *length = 0; |
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1093 | return 1; |
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1094 | } |
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1095 | } // end _heap_info() |
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1096 | |
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1097 | |
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1098 | /////////////////////////////////////////////////////////////////////////////////// |
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1099 | // Required by GCC |
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1100 | /////////////////////////////////////////////////////////////////////////////////// |
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1101 | |
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1102 | /////////////////////////////////////////////////////////////////////////////////// |
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1103 | // Copy a source memory buffer content to a dest memory buffer (size bytes) |
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1104 | // Code taken from MutekH. |
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1105 | /////////////////////////////////////////////////////////////////////////////////// |
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1106 | void* memcpy( void* dest, // dest buffer vbase |
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1107 | const void* source, // source buffer vbase |
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1108 | unsigned int size ) // bytes |
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1109 | { |
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1110 | unsigned int* idst = (unsigned int*)dest; |
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1111 | unsigned int* isrc = (unsigned int*)source; |
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1112 | |
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1113 | // word-by-word copy |
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1114 | if (!((unsigned int) idst & 3) && !((unsigned int) isrc & 3)) |
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1115 | { |
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1116 | while (size > 3) |
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1117 | { |
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1118 | *idst++ = *isrc++; |
---|
1119 | size -= 4; |
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1120 | } |
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1121 | } |
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1122 | |
---|
1123 | unsigned char* cdst = (unsigned char*)dest; |
---|
1124 | unsigned char* csrc = (unsigned char*)source; |
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1125 | |
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1126 | /* byte-by-byte copy */ |
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1127 | while (size--) |
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1128 | { |
---|
1129 | *cdst++ = *csrc++; |
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1130 | } |
---|
1131 | return dest; |
---|
1132 | } |
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1133 | ////////////////////////////////////////////////////////////////////////////////// |
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1134 | // Fill a byte string with a byte value. |
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1135 | ////////////////////////////////////////////////////////////////////////////////// |
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1136 | void * memset( void* dest, |
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1137 | int value, |
---|
1138 | unsigned int count ) |
---|
1139 | { |
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1140 | // word-by-word copy |
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1141 | unsigned int* idst = dest; |
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1142 | unsigned int data = (((unsigned char)value) ) | |
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1143 | (((unsigned char)value) << 8) | |
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1144 | (((unsigned char)value) << 16) | |
---|
1145 | (((unsigned char)value) << 24) ; |
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1146 | |
---|
1147 | if ( ! ((unsigned int)idst & 3) ) |
---|
1148 | { |
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1149 | while ( count > 3 ) |
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1150 | { |
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1151 | *idst++ = data; |
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1152 | count -= 4; |
---|
1153 | } |
---|
1154 | } |
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1155 | |
---|
1156 | // byte-by-byte copy |
---|
1157 | unsigned char* cdst = dest; |
---|
1158 | while (count--) |
---|
1159 | { |
---|
1160 | *cdst++ = (unsigned char)value; |
---|
1161 | } |
---|
1162 | return dest; |
---|
1163 | } |
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1164 | |
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1165 | |
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1166 | // Local Variables: |
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1167 | // tab-width: 4 |
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1168 | // c-basic-offset: 4 |
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1169 | // c-file-offsets:((innamespace . 0)(inline-open . 0)) |
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1170 | // indent-tabs-mode: nil |
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1171 | // End: |
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1172 | // vim: filetype=c:expandtab:shiftwidth=4:tabstop=4:softtabstop=4 |
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1173 | |
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