1 | ////////////////////////////////////////////////////////////////////////////////// |
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2 | // File : boot_handler.c |
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3 | // Date : 01/04/2012 |
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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 boot_handler.h and boot_handler.c files are part of the GIET nano-kernel. |
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8 | // This code can be used in the boot phase to launch one or several multi-tasks |
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9 | // applications on a many_cores hardware architecture. |
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10 | // It uses the SoCLib generic MMU (paged virtual memory) to provide two services: |
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11 | // |
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12 | // 1) classical memory protection, when several independant applications compiled |
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13 | // in different virtual spaces are executing on the same hardware platform. |
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14 | // 2) data placement in NUMA architectures, when we want to control the placement |
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15 | // of the software objects (virtual segments) on the physical memory banks. |
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16 | // |
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17 | // It uses the MAPPING_INFO binary data structures, that must be pre-loaded in the |
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18 | // boot ROM in the seg_boot_mapping segment (at address seg_boot_mapping_base). |
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19 | // This MAPPING_INFO data structure defines both the hardware architecture, |
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20 | // and the mapping: |
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21 | // - number of clusters, |
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22 | // - number of processors in each cluster, |
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23 | // - physical segmentation of the physical address space, |
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24 | // - number of virtual spaces (one multi-task application per vspace), |
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25 | // - number of tasks per vspace, |
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26 | // - number of mwmr channels per vspace, |
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27 | // - number of virtual segments per vspace, |
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28 | // - static placement of tasks on the processors, |
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29 | // - static placement of virtual segments (vseg) in the physical segments (pseg). |
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30 | // |
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31 | // The page table are statically constructed in the boot phase, and they do not |
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32 | // change during execution. The GIET uses only 4 Kbytes pages. |
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33 | // As most applications use only a limited number of segments, the number of PT2s |
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34 | // actually used by a given virtual space is generally smaller than 2048, and is |
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35 | // defined at compile time (GIET_NB_PT2_MAX configuration parameter). |
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36 | // For alignment constraints, GIET_NB_PT2_MAX must be an even number. |
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37 | // The max number of virtual spaces (GIET_NB_VSPACE_MAX) is a configuration parameter. |
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38 | // |
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39 | // Each page table (one page table per virtual space) is monolithic: |
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40 | // - a first 8K aligned PT1[2148] array, indexed by the (ix1) field of VPN. |
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41 | // The PT1 contains 2048 PTD of 4 bytes => 8K bytes. |
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42 | // - an aray of array PT2[1024][GIET_NB_PT2_MAX], indexed by |
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43 | // the (ix2) field of the VPN, and by the PT2 index (pt2_id). |
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44 | // Each PT2 contains 512 PTE2 of 8bytes => 4Kbytes * GIET_NB_PT2_MAX |
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45 | // The size of each page table is 8K + (GIET_NB_PT2_MAX)*4K bytes. |
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46 | // All page tables must be stored in the seg_kernel_pt segment (at address |
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47 | // seg_kernel_pt_base) |
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48 | //////////////////////////////////////////////////////////////////////////////////// |
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49 | |
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50 | #include <mips32_registers.h> |
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51 | #include <boot_handler.h> |
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52 | #include <mapping_info.h> |
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53 | #include <giet_config.h> |
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54 | #include <common.h> |
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55 | #include <ctx_handler.h> |
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56 | #include <irq_handler.h> |
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57 | #include <hwr_mapping.h> |
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58 | #include <mwmr.h> |
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59 | |
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60 | #define in_ptab __attribute__((section (".ptab"))) |
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61 | #define in_boot __attribute__((section (".boot"))) |
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62 | |
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63 | #if !defined(GIET_NB_VSPACE_MAX) |
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64 | # error The GIET_NB_VSPACE_MAX value must be defined in the 'giet_config.h' file ! |
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65 | #endif |
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66 | |
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67 | #if !defined(GIET_NB_PT2_MAX) |
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68 | # error The GIET_NB_PT2_MAX value must be defined in the 'giet_config.h' file ! |
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69 | #endif |
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70 | |
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71 | //////////////////////////////////////////////////////////////////////////// |
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72 | // Global variables |
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73 | //////////////////////////////////////////////////////////////////////////// |
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74 | |
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75 | // Page Tables (each one takes PT1_SIZE + (GIET_NB_PT2_MAX)*PT2_SIZE bytes |
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76 | // It will be stored in seg_kernel_pt segment |
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77 | in_ptab page_table_t _ptab_array[GIET_NB_VSPACE_MAX]; |
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78 | |
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79 | // PT2 allocator : next free PT2 index |
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80 | // will be stored in seg_kernel_data segment |
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81 | unsigned int _next_free_pt2[GIET_NB_VSPACE_MAX] = |
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82 | { [0 ... GIET_NB_VSPACE_MAX-1] = 0 }; |
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83 | |
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84 | |
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85 | ////////////////////////////////////////////////////////////////////////////// |
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86 | // boot_procid() |
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87 | ////////////////////////////////////////////////////////////////////////////// |
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88 | in_boot unsigned int boot_procid() |
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89 | { |
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90 | unsigned int ret; |
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91 | asm volatile("mfc0 %0, $15, 1" : "=r"(ret)); |
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92 | return (ret & 0x3FF); |
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93 | } |
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94 | |
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95 | ////////////////////////////////////////////////////////////////////////////// |
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96 | // boot_time() |
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97 | ////////////////////////////////////////////////////////////////////////////// |
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98 | in_boot unsigned int boot_time() |
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99 | { |
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100 | unsigned int ret; |
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101 | asm volatile("mfc0 %0, $9" : "=r"(ret)); |
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102 | return ret; |
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103 | } |
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104 | |
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105 | ////////////////////////////////////////////////////////////////////////////// |
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106 | // boot_exit() |
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107 | ////////////////////////////////////////////////////////////////////////////// |
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108 | in_boot void boot_exit() |
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109 | { |
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110 | while(1) asm volatile("nop"); |
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111 | } |
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112 | |
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113 | //////////////////////////////////////////////////////////////////////////// |
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114 | // boot_eret() |
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115 | //////////////////////////////////////////////////////////////////////////// |
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116 | in_boot void boot_eret() |
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117 | { |
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118 | asm volatile("eret"); |
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119 | } |
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120 | |
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121 | //////////////////////////////////////////////////////////////////////////// |
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122 | // boot_strncmp() |
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123 | //////////////////////////////////////////////////////////////////////////// |
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124 | in_boot int boot_strncmp( const char* s1, |
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125 | const char* s2, |
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126 | unsigned int n ) |
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127 | { |
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128 | unsigned int i; |
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129 | for ( i=0 ; i<n ; i++) |
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130 | { |
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131 | if ( s1[i] != s2[i] ) return 1; |
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132 | if ( s1[i] == 0 ) break; |
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133 | } |
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134 | return 0; |
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135 | } |
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136 | |
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137 | //////////////////////////////////////////////////////////////////////////// |
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138 | // boot_tty_puts() |
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139 | // (it uses TTY0) |
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140 | //////////////////////////////////////////////////////////////////////////// |
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141 | in_boot void boot_tty_puts(const char *buffer) |
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142 | { |
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143 | unsigned int* tty_address = (unsigned int*)&seg_tty_base; |
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144 | unsigned int n; |
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145 | |
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146 | for ( n=0; n<100; n++) |
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147 | { |
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148 | if (buffer[n] == 0) break; |
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149 | tty_address[0] = (unsigned int)buffer[n]; |
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150 | } |
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151 | } |
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152 | |
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153 | //////////////////////////////////////////////////////////////////////////// |
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154 | // boot_tty_putw() |
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155 | // (it uses TTY0) |
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156 | //////////////////////////////////////////////////////////////////////////// |
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157 | in_boot void boot_tty_putw(unsigned int val) |
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158 | { |
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159 | static const char HexaTab[] = "0123456789ABCDEF"; |
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160 | char buf[11]; |
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161 | unsigned int c; |
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162 | |
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163 | buf[0] = '0'; |
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164 | buf[1] = 'x'; |
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165 | buf[10] = 0; |
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166 | |
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167 | for ( c = 0 ; c < 8 ; c++ ) |
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168 | { |
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169 | buf[9-c] = HexaTab[val&0xF]; |
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170 | val = val >> 4; |
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171 | } |
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172 | boot_tty_puts(buf); |
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173 | } |
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174 | |
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175 | ///////////////////////////////////////////////////////////////////////////// |
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176 | // various mapping_info data structure access functions |
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177 | ///////////////////////////////////////////////////////////////////////////// |
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178 | in_boot mapping_cluster_t* boot_get_cluster_base( mapping_header_t* header ) |
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179 | { |
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180 | return (mapping_cluster_t*) ((char*)header + |
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181 | MAPPING_HEADER_SIZE); |
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182 | } |
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183 | ///////////////////////////////////////////////////////////////////////////// |
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184 | in_boot mapping_pseg_t* boot_get_pseg_base( mapping_header_t* header ) |
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185 | { |
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186 | return (mapping_pseg_t*) ((char*)header + |
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187 | MAPPING_HEADER_SIZE + |
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188 | MAPPING_CLUSTER_SIZE*header->clusters); |
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189 | } |
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190 | ///////////////////////////////////////////////////////////////////////////// |
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191 | in_boot mapping_vspace_t* boot_get_vspace_base( mapping_header_t* header ) |
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192 | { |
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193 | return (mapping_vspace_t*) ((char*)header + |
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194 | MAPPING_HEADER_SIZE + |
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195 | MAPPING_CLUSTER_SIZE*header->clusters + |
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196 | MAPPING_PSEG_SIZE*header->psegs); |
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197 | } |
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198 | ///////////////////////////////////////////////////////////////////////////// |
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199 | in_boot mapping_vseg_t* boot_get_vseg_base( mapping_header_t* header ) |
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200 | { |
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201 | return (mapping_vseg_t*) ((char*)header + |
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202 | MAPPING_HEADER_SIZE + |
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203 | MAPPING_CLUSTER_SIZE*header->clusters + |
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204 | MAPPING_PSEG_SIZE*header->psegs + |
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205 | MAPPING_VSPACE_SIZE*header->vspaces); |
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206 | } |
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207 | ///////////////////////////////////////////////////////////////////////////// |
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208 | in_boot mapping_task_t* boot_get_task_base( mapping_header_t* header ) |
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209 | { |
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210 | return (mapping_task_t*) ((char*)header + |
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211 | MAPPING_HEADER_SIZE + |
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212 | MAPPING_CLUSTER_SIZE*header->clusters + |
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213 | MAPPING_PSEG_SIZE*header->psegs + |
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214 | MAPPING_VSPACE_SIZE*header->vspaces + |
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215 | MAPPING_VSEG_SIZE*header->vsegs); |
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216 | } |
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217 | |
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218 | ///////////////////////////////////////////////////////////////////////////// |
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219 | // print the content of the mapping_info data structure |
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220 | //////////////////////////////////////////////////////////////////////// |
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221 | in_boot void boot_print_mapping_info() |
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222 | { |
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223 | mapping_header_t* header = (mapping_header_t*)&seg_boot_mapping_base; |
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224 | |
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225 | unsigned int vspace_id; |
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226 | unsigned int cluster_id; |
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227 | unsigned int pseg_id; |
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228 | unsigned int vseg_id; |
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229 | unsigned int task_id; |
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230 | |
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231 | mapping_cluster_t* cluster = boot_get_cluster_base( header ); |
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232 | mapping_pseg_t* pseg = boot_get_pseg_base( header );; |
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233 | mapping_vspace_t* vspace = boot_get_vspace_base ( header );; |
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234 | mapping_vseg_t* vseg = boot_get_vseg_base ( header ); |
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235 | mapping_task_t* task = boot_get_task_base ( header );; |
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236 | |
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237 | // header |
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238 | boot_tty_puts("mapping_info"); |
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239 | |
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240 | boot_tty_puts("\n - signature = "); |
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241 | boot_tty_putw(header->signature); |
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242 | boot_tty_puts("\n - name = "); |
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243 | boot_tty_puts(header->name); |
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244 | boot_tty_puts("\n - clusters = "); |
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245 | boot_tty_putw(header->clusters); |
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246 | boot_tty_puts("\n - psegs = "); |
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247 | boot_tty_putw(header->psegs); |
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248 | boot_tty_puts("\n - ttys = "); |
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249 | boot_tty_putw(header->ttys); |
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250 | boot_tty_puts("\n - vspaces = "); |
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251 | boot_tty_putw(header->vspaces); |
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252 | boot_tty_puts("\n - globals = "); |
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253 | boot_tty_putw(header->globals); |
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254 | boot_tty_puts("\n - vsegs = "); |
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255 | boot_tty_putw(header->vsegs); |
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256 | boot_tty_puts("\n - tasks = "); |
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257 | boot_tty_putw(header->tasks); |
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258 | boot_tty_puts("\n - syspath = "); |
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259 | boot_tty_puts(header->syspath); |
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260 | boot_tty_puts("\n\n"); |
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261 | |
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262 | // clusters |
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263 | for ( cluster_id = 0 ; cluster_id < header->clusters ; cluster_id++ ) |
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264 | { |
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265 | boot_tty_puts("cluster "); |
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266 | boot_tty_putw(cluster_id); |
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267 | |
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268 | boot_tty_puts("\n - procs = "); |
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269 | boot_tty_putw(cluster[cluster_id].procs); |
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270 | boot_tty_puts("\n - timers = "); |
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271 | boot_tty_putw(cluster[cluster_id].timers); |
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272 | boot_tty_puts("\n - dmas = "); |
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273 | boot_tty_putw(cluster[cluster_id].dmas); |
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274 | boot_tty_puts("\n\n"); |
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275 | } |
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276 | |
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277 | // psegs |
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278 | for ( pseg_id = 0 ; pseg_id < header->psegs ; pseg_id++ ) |
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279 | { |
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280 | boot_tty_puts("pseg "); |
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281 | boot_tty_putw(pseg_id); |
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282 | |
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283 | boot_tty_puts("\n - name = "); |
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284 | boot_tty_puts( pseg[pseg_id].name ); |
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285 | boot_tty_puts("\n - base = "); |
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286 | boot_tty_putw( pseg[pseg_id].base ); |
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287 | boot_tty_puts("\n - length = "); |
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288 | boot_tty_putw( pseg[pseg_id].length ); |
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289 | boot_tty_puts("\n\n"); |
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290 | } |
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291 | |
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292 | // globals |
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293 | for ( vseg_id = 0 ; vseg_id < header->globals ; vseg_id++ ) |
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294 | { |
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295 | boot_tty_puts("global vseg "); |
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296 | boot_tty_putw(vseg_id); |
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297 | |
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298 | boot_tty_puts("\n - name = "); |
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299 | boot_tty_puts( vseg[vseg_id].name ); |
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300 | boot_tty_puts("\n - vbase = "); |
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301 | boot_tty_putw( vseg[vseg_id].vbase ); |
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302 | boot_tty_puts("\n - length = "); |
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303 | boot_tty_putw( vseg[vseg_id].length ); |
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304 | boot_tty_puts("\n - mode = "); |
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305 | boot_tty_putw( vseg[vseg_id].mode ); |
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306 | boot_tty_puts("\n - ident = "); |
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307 | boot_tty_putw( vseg[vseg_id].ident ); |
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308 | boot_tty_puts("\n - psegname = "); |
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309 | boot_tty_puts( pseg[vseg[vseg_id].psegid].name ); |
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310 | boot_tty_puts("\n\n"); |
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311 | } |
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312 | |
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313 | // vspaces |
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314 | for ( vspace_id = 0 ; vspace_id < header->vspaces ; vspace_id++ ) |
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315 | { |
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316 | boot_tty_puts("vspace "); |
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317 | boot_tty_putw(vspace_id); |
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318 | |
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319 | boot_tty_puts("\n - name = "); |
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320 | boot_tty_puts( vspace[vspace_id].name ); |
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321 | boot_tty_puts("\n - binpath = "); |
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322 | boot_tty_puts( vspace[vspace_id].binpath ); |
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323 | boot_tty_puts("\n - vsegs = "); |
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324 | boot_tty_putw( vspace[vspace_id].vsegs ); |
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325 | boot_tty_puts("\n - tasks = "); |
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326 | boot_tty_putw( vspace[vspace_id].tasks ); |
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327 | boot_tty_puts("\n - mwmrs = "); |
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328 | boot_tty_putw( vspace[vspace_id].mwmrs ); |
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329 | boot_tty_puts("\n - ttys = "); |
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330 | boot_tty_putw( vspace[vspace_id].ttys ); |
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331 | boot_tty_puts("\n\n"); |
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332 | |
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333 | for ( vseg_id = vspace[vspace_id].vseg_offset ; |
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334 | vseg_id < (vspace[vspace_id].vseg_offset + vspace[vspace_id].vsegs) ; |
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335 | vseg_id++ ) |
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336 | { |
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337 | boot_tty_puts(" private vseg "); |
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338 | boot_tty_putw( vseg_id ); |
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339 | |
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340 | boot_tty_puts("\n - name = "); |
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341 | boot_tty_puts( vseg[vseg_id].name ); |
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342 | boot_tty_puts("\n - vbase = "); |
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343 | boot_tty_putw( vseg[vseg_id].vbase ); |
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344 | boot_tty_puts("\n - length = "); |
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345 | boot_tty_putw( vseg[vseg_id].length ); |
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346 | boot_tty_puts("\n - mode = "); |
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347 | boot_tty_putw( vseg[vseg_id].mode ); |
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348 | boot_tty_puts("\n - ident = "); |
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349 | boot_tty_putw( vseg[vseg_id].ident ); |
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350 | boot_tty_puts("\n - psegname = "); |
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351 | boot_tty_puts( pseg[vseg[vseg_id].psegid].name ); |
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352 | boot_tty_puts("\n\n"); |
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353 | } |
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354 | |
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355 | for ( task_id = vspace[vspace_id].vseg_offset ; |
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356 | task_id < (vspace[vspace_id].task_offset + vspace[vspace_id].tasks) ; |
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357 | task_id++ ) |
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358 | { |
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359 | boot_tty_puts(" task"); |
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360 | boot_tty_putw( task_id ); |
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361 | |
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362 | boot_tty_puts("\n - name = "); |
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363 | boot_tty_puts( task[task_id].name ); |
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364 | boot_tty_puts("\n - clusterid = "); |
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365 | boot_tty_putw( task[task_id].clusterid ); |
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366 | boot_tty_puts("\n - proclocid = "); |
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367 | boot_tty_putw( task[task_id].proclocid ); |
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368 | boot_tty_puts("\n - vseglocid = "); |
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369 | boot_tty_putw( task[task_id].vseglocid ); |
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370 | boot_tty_puts("\n - startid = "); |
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371 | boot_tty_putw( task[task_id].startid ); |
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372 | boot_tty_puts("\n - ttylocid = "); |
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373 | boot_tty_putw( task[task_id].ttylocid ); |
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374 | boot_tty_puts("\n\n"); |
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375 | } |
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376 | } |
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377 | } // end boot_print_mapping_info() |
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378 | |
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379 | ////////////////////////////////////////////////////////////////////////////// |
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380 | // boot_pseg_get() |
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381 | // This function returns the pointer on a physical segment |
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382 | // identified by the segment index. |
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383 | ////////////////////////////////////////////////////////////////////////////// |
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384 | in_boot mapping_pseg_t* boot_pseg_get( unsigned int seg_id) |
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385 | { |
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386 | mapping_header_t* header = (mapping_header_t*)&seg_boot_mapping_base; |
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387 | mapping_pseg_t* pseg = boot_get_pseg_base( header ); |
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388 | |
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389 | // checking argument |
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390 | if ( seg_id >= header->psegs ) |
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391 | { |
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392 | boot_tty_puts("\n[BOOT ERROR] : seg_id argument too large\n"); |
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393 | boot_tty_puts(" in function boot_pseg_get()\n"); |
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394 | boot_exit(); |
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395 | } |
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396 | |
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397 | return &pseg[seg_id]; |
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398 | } // end boot_pseg_get() |
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399 | |
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400 | ////////////////////////////////////////////////////////////////////////////// |
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401 | // boot_add_pte() |
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402 | // This function registers a new PTE in the page table pointed |
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403 | // by the vspace_id argument, and updates both PT1 and PT2. |
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404 | // A new PT2 is used when required. |
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405 | // As the set of PT2s is implemented as a fixed size array (no dynamic |
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406 | // allocation), this function checks a possible overflow of the PT2 array. |
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407 | ////////////////////////////////////////////////////////////////////////////// |
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408 | in_boot void boot_add_pte( unsigned int vspace_id, |
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409 | unsigned int vpn, |
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410 | unsigned int flags, |
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411 | unsigned int ppn ) |
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412 | { |
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413 | unsigned int ix1; |
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414 | unsigned int ix2; |
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415 | unsigned int ptba; // PT2 base address |
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416 | unsigned int pt2_id; // PT2 index |
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417 | unsigned int* pt_flags; // pointer on the pte_flags = &PT2[2*ix2] |
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418 | unsigned int* pt_ppn; // pointer on the pte_ppn = &PT2[2*ix2+1] |
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419 | |
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420 | ix1 = vpn >> 9; // 11 bits |
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421 | ix2 = vpn & 0x1FF; // 9 bits |
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422 | |
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423 | // get the page table base address |
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424 | page_table_t* pt = (page_table_t *)(&_ptab_array[vspace_id]); |
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425 | |
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426 | if ( (pt->pt1[ix1] & PTE_V) == 0 ) // set a new PTD in PT1 |
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427 | { |
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428 | pt2_id = _next_free_pt2[vspace_id]; |
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429 | if ( pt2_id == GIET_NB_PT2_MAX ) |
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430 | { |
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431 | boot_tty_puts("\n[BOOT ERROR] in boot_add_pte() function\n"); |
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432 | boot_tty_puts("the GIET_NB_PT2_MAX parameter is too small\n"); |
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433 | boot_exit(); |
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434 | } |
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435 | else |
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436 | { |
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437 | ptba = (unsigned int)pt + PT1_SIZE + PT2_SIZE*pt2_id; |
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438 | pt->pt1[ix1] = PTE_V | PTE_T | (ptba >> 12); |
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439 | _next_free_pt2[vspace_id] = pt2_id + 1; |
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440 | } |
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441 | } |
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442 | else |
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443 | { |
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444 | ptba = pt->pt1[ix1] << 12; |
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445 | } |
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446 | |
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447 | // set PTE2 after checking double mapping error |
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448 | pt_flags = (unsigned int*)(ptba + 8*ix2); |
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449 | pt_ppn = (unsigned int*)(ptba + 8*ix2 + 4); |
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450 | |
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451 | if ( ( *pt_flags & PTE_V) != 0 ) // page already mapped |
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452 | { |
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453 | boot_tty_puts("\n[BOOT ERROR] in boot_add_pte() function\n"); |
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454 | boot_tty_puts("page already mapped\n"); |
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455 | boot_exit(); |
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456 | } |
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457 | else // set PTE2 |
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458 | { |
---|
459 | *pt_flags = flags; |
---|
460 | *pt_ppn = ppn; |
---|
461 | } |
---|
462 | } // end boot_add_pte() |
---|
463 | |
---|
464 | ///////////////////////////////////////////////////////////////////// |
---|
465 | // This function build the page table for a given vspace. |
---|
466 | // The physical base addresses for all vsegs (global and private) |
---|
467 | // must have been previously computed. |
---|
468 | // It initializes the MWMR channels. |
---|
469 | ///////////////////////////////////////////////////////////////////// |
---|
470 | in_boot void boot_vspace_pt_build( unsigned int vspace_id ) |
---|
471 | { |
---|
472 | unsigned int vseg_id; |
---|
473 | unsigned int npages; |
---|
474 | unsigned int ppn; |
---|
475 | unsigned int vpn; |
---|
476 | unsigned int flags; |
---|
477 | unsigned int page_id; |
---|
478 | |
---|
479 | mapping_header_t* header = (mapping_header_t*)&seg_boot_mapping_base; |
---|
480 | mapping_vspace_t* vspace = boot_get_vspace_base( header ); |
---|
481 | mapping_vseg_t* vseg = boot_get_vseg_base( header ); |
---|
482 | |
---|
483 | // global segments |
---|
484 | for ( vseg_id = 0 ; vseg_id < header->globals ; vseg_id++ ) |
---|
485 | { |
---|
486 | vpn = vseg[vseg_id].vbase >> 12; |
---|
487 | ppn = vseg[vseg_id].pbase >> 12; |
---|
488 | npages = vseg[vseg_id].length >> 12; |
---|
489 | if ( (vseg[vseg_id].length & 0xFFF) != 0 ) npages++; |
---|
490 | |
---|
491 | flags = PTE_V; |
---|
492 | if ( vseg[vseg_id].mode & C_MODE_MASK ) flags = flags | PTE_C; |
---|
493 | if ( vseg[vseg_id].mode & X_MODE_MASK ) flags = flags | PTE_X; |
---|
494 | if ( vseg[vseg_id].mode & W_MODE_MASK ) flags = flags | PTE_W; |
---|
495 | if ( vseg[vseg_id].mode & U_MODE_MASK ) flags = flags | PTE_U; |
---|
496 | |
---|
497 | #if BOOT_DEBUG_PT |
---|
498 | boot_tty_puts("- vseg "); |
---|
499 | boot_tty_puts( vseg[vseg_id].name ); |
---|
500 | boot_tty_puts(" / flags = "); |
---|
501 | boot_tty_putw( flags ); |
---|
502 | boot_tty_puts(" / npages = "); |
---|
503 | boot_tty_putw( npages ); |
---|
504 | boot_tty_puts("\n"); |
---|
505 | #endif |
---|
506 | // loop on 4K pages |
---|
507 | for ( page_id = 0 ; page_id < npages ; page_id++ ) |
---|
508 | { |
---|
509 | boot_add_pte( vspace_id, |
---|
510 | vpn, |
---|
511 | flags, |
---|
512 | ppn ); |
---|
513 | vpn++; |
---|
514 | ppn++; |
---|
515 | } |
---|
516 | } |
---|
517 | |
---|
518 | // private segments |
---|
519 | for ( vseg_id = vspace[vspace_id].vseg_offset ; |
---|
520 | vseg_id < (vspace[vspace_id].vseg_offset + vspace[vspace_id].vsegs) ; |
---|
521 | vseg_id++ ) |
---|
522 | { |
---|
523 | vpn = vseg[vseg_id].vbase >> 12; |
---|
524 | ppn = vseg[vseg_id].pbase >> 12; |
---|
525 | npages = vseg[vseg_id].length >> 12; |
---|
526 | if ( (vseg[vseg_id].length & 0xFFF) != 0 ) npages++; |
---|
527 | |
---|
528 | flags = PTE_V; |
---|
529 | if ( vseg[vseg_id].mode & C_MODE_MASK ) flags = flags | PTE_C; |
---|
530 | if ( vseg[vseg_id].mode & X_MODE_MASK ) flags = flags | PTE_X; |
---|
531 | if ( vseg[vseg_id].mode & W_MODE_MASK ) flags = flags | PTE_W; |
---|
532 | if ( vseg[vseg_id].mode & U_MODE_MASK ) flags = flags | PTE_U; |
---|
533 | |
---|
534 | #if BOOT_DEBUG_PT |
---|
535 | boot_tty_puts("- vseg "); |
---|
536 | boot_tty_puts( vseg[vseg_id].name ); |
---|
537 | boot_tty_puts(" / flags = "); |
---|
538 | boot_tty_putw( flags ); |
---|
539 | boot_tty_puts("\n"); |
---|
540 | #endif |
---|
541 | // loop on 4K pages |
---|
542 | for ( page_id = 0 ; page_id < npages ; page_id++ ) |
---|
543 | { |
---|
544 | boot_add_pte( vspace_id, |
---|
545 | vpn, |
---|
546 | flags, |
---|
547 | ppn ); |
---|
548 | vpn++; |
---|
549 | ppn++; |
---|
550 | } |
---|
551 | |
---|
552 | // initializes MWMR channel if vseg is a MWMR |
---|
553 | // the channel storage capacity is (vseg.legth/4 - 5) words |
---|
554 | if ( vseg[vseg_id].mwmr ) |
---|
555 | { |
---|
556 | mwmr_channel_t* mwmr = (mwmr_channel_t*)(vseg[vseg_id].pbase); |
---|
557 | mwmr->ptw = 0; |
---|
558 | mwmr->ptr = 0; |
---|
559 | mwmr->sts = 0; |
---|
560 | mwmr->depth = (vseg[vseg_id].length>>2) - 5; |
---|
561 | mwmr->lock = 0; |
---|
562 | |
---|
563 | #if BOOT_DEBUG_PT |
---|
564 | boot_tty_puts(" MWMR channel depth = "); |
---|
565 | boot_tty_putw( mwmr->depth ); |
---|
566 | boot_tty_puts("\n"); |
---|
567 | #endif |
---|
568 | |
---|
569 | } |
---|
570 | } |
---|
571 | } // end boot_vspace_pt_build() |
---|
572 | |
---|
573 | ////////////////////////////////////////////////////////////////////// |
---|
574 | // This function uses the page tables to translate a virtual address |
---|
575 | // to a physical address, depending on the vspace index. |
---|
576 | ////////////////////////////////////////////////////////////////////// |
---|
577 | in_boot unsigned int boot_translate( unsigned int vaddr, |
---|
578 | unsigned int vspace_id ) |
---|
579 | { |
---|
580 | page_table_t* ptp; |
---|
581 | unsigned int* ptba; |
---|
582 | unsigned int paddr; |
---|
583 | |
---|
584 | // compute indexes |
---|
585 | unsigned int ix1 = (vaddr >> 21) & 0x7FF; |
---|
586 | unsigned int ix2 = (vaddr >> 12) & 0x1FF; |
---|
587 | unsigned int offset = vaddr & 0xFFF; |
---|
588 | |
---|
589 | // get the page table base address |
---|
590 | ptp = (page_table_t*)((char*)&seg_kernel_pt_base + vspace_id*sizeof(page_table_t)); |
---|
591 | |
---|
592 | // compute PTBA |
---|
593 | ptba = (unsigned int*)(ptp->pt1[ix1] << 12); |
---|
594 | |
---|
595 | // compute paddr |
---|
596 | paddr = (ptba[2*ix2 + 1] << 12) + offset; |
---|
597 | |
---|
598 | #if BOOT_DEBUG_TRANSLATE |
---|
599 | boot_tty_puts("\nAddress Translation\n"); |
---|
600 | boot_tty_puts("- vaddr = "); |
---|
601 | boot_tty_putw( vaddr ); |
---|
602 | boot_tty_puts("\n"); |
---|
603 | boot_tty_puts("- ix1 = "); |
---|
604 | boot_tty_putw( ix1 ); |
---|
605 | boot_tty_puts("\n"); |
---|
606 | boot_tty_puts("- ix2 = "); |
---|
607 | boot_tty_putw( ix2 ); |
---|
608 | boot_tty_puts("\n"); |
---|
609 | boot_tty_puts("- ptp = "); |
---|
610 | boot_tty_putw( (unsigned int)ptp ); |
---|
611 | boot_tty_puts("\n"); |
---|
612 | boot_tty_puts("- ptba = "); |
---|
613 | boot_tty_putw( (unsigned int)ptba ); |
---|
614 | boot_tty_puts("\n"); |
---|
615 | boot_tty_puts("- paddr = "); |
---|
616 | boot_tty_putw( paddr ); |
---|
617 | boot_tty_puts("\n"); |
---|
618 | #endif |
---|
619 | |
---|
620 | return paddr; |
---|
621 | } // end boot_translate() |
---|
622 | |
---|
623 | /////////////////////////////////////////////////////////////////////////////// |
---|
624 | // This function initialises the task context for a given vspace. |
---|
625 | // There is a private context array for each vspace, indexed by the |
---|
626 | // (task_id, proc_id) composite index. |
---|
627 | // The following values are written in the task context: |
---|
628 | // - SP stack pointer = stack_base + stack_length |
---|
629 | // - RA return address = &boot_eret |
---|
630 | // - EPC start address = start_vector[task->startid] |
---|
631 | // - SR status register = OxFF13 |
---|
632 | // - TTY TTY index = base_tty_id + tty_local_id |
---|
633 | // - PTPR page table base address / 8K |
---|
634 | // - MODE mmu_mode = 0xF (TLBs and caches activated) |
---|
635 | // It statically allocates the task to the proper scheduler |
---|
636 | // (one scheduler per processor). |
---|
637 | //////////////////////////////////////////////////////////////////////////////// |
---|
638 | in_boot void boot_task_map( unsigned int task_id, // global index |
---|
639 | unsigned int vspace_id, // global index |
---|
640 | unsigned int base_tty_id, |
---|
641 | unsigned int* start_vector ) |
---|
642 | { |
---|
643 | mapping_header_t* header = (mapping_header_t*)&seg_boot_mapping_base; |
---|
644 | |
---|
645 | mapping_vseg_t* vseg = boot_get_vseg_base(header); |
---|
646 | mapping_task_t* task = boot_get_task_base(header); |
---|
647 | mapping_vspace_t* vspace = boot_get_vspace_base(header); |
---|
648 | |
---|
649 | unsigned int vseg_id; |
---|
650 | unsigned int loc_id; |
---|
651 | unsigned int proc_id; |
---|
652 | |
---|
653 | unsigned int sp; |
---|
654 | unsigned int ra = (unsigned int)&boot_eret; |
---|
655 | unsigned int epc = start_vector[task[task_id].startid]; |
---|
656 | unsigned int tty = base_tty_id + task[task_id].ttylocid; |
---|
657 | unsigned int sr = 0x0000FF13; |
---|
658 | unsigned int ptpr = ((unsigned int)&_ptab_array[vspace_id]) >> 13; |
---|
659 | unsigned int mode = 0xF; |
---|
660 | |
---|
661 | // check values |
---|
662 | if ( task[task_id].proclocid >= NB_PROCS ) |
---|
663 | { |
---|
664 | boot_tty_puts("\n[BOOT ERROR] : processor index too large for task "); |
---|
665 | boot_tty_puts( task[task_id].name ); |
---|
666 | boot_tty_puts(" in vspace "); |
---|
667 | boot_tty_puts( vspace[vspace_id].name ); |
---|
668 | boot_tty_puts("\n"); |
---|
669 | boot_exit(); |
---|
670 | } |
---|
671 | if ( task[task_id].clusterid >= NB_CLUSTERS ) |
---|
672 | { |
---|
673 | boot_tty_puts("\n[BOOT ERROR] : cluster index too large for task "); |
---|
674 | boot_tty_puts( task[task_id].name ); |
---|
675 | boot_tty_puts(" in vspace "); |
---|
676 | boot_tty_puts( vspace[vspace_id].name ); |
---|
677 | boot_tty_puts("\n"); |
---|
678 | boot_exit(); |
---|
679 | } |
---|
680 | if ( task[task_id].vseglocid >= vspace->vsegs ) |
---|
681 | { |
---|
682 | boot_tty_puts("\n[BOOT ERROR] : vseg index too large for task "); |
---|
683 | boot_tty_puts( task[task_id].name ); |
---|
684 | boot_tty_puts(" in vspace "); |
---|
685 | boot_tty_puts( vspace[vspace_id].name ); |
---|
686 | boot_tty_puts("\n"); |
---|
687 | boot_exit(); |
---|
688 | } |
---|
689 | if ( task[task_id].startid >= vspace->tasks ) |
---|
690 | { |
---|
691 | boot_tty_puts("\n[BOOT ERROR] : start index too large for task "); |
---|
692 | boot_tty_puts( task[task_id].name ); |
---|
693 | boot_tty_puts(" in vspace "); |
---|
694 | boot_tty_puts( vspace[vspace_id].name ); |
---|
695 | boot_tty_puts("\n"); |
---|
696 | boot_exit(); |
---|
697 | } |
---|
698 | if ( tty >= NB_TTYS ) |
---|
699 | { |
---|
700 | boot_tty_puts("\n[BOOT ERROR] : TTY index too large for task "); |
---|
701 | boot_tty_puts( task[task_id].name ); |
---|
702 | boot_tty_puts(" in vspace "); |
---|
703 | boot_tty_puts( vspace[vspace_id].name ); |
---|
704 | boot_tty_puts("\n"); |
---|
705 | boot_exit(); |
---|
706 | } |
---|
707 | |
---|
708 | // get stack pointer value |
---|
709 | vseg_id = task[task_id].vseglocid + vspace[vspace_id].vseg_offset; |
---|
710 | sp = vseg[vseg_id].vbase + vseg[vseg_id].length; |
---|
711 | |
---|
712 | // compute global processor index |
---|
713 | proc_id = task[task_id].clusterid * NB_PROCS + task[task_id].proclocid; |
---|
714 | |
---|
715 | // check local task index |
---|
716 | loc_id = _scheduler[proc_id].tasks; |
---|
717 | if ( loc_id >= GIET_NB_TASKS_MAX ) |
---|
718 | { |
---|
719 | boot_tty_puts("\n[BOOT ERROR] : too much tasks allocated to processor "); |
---|
720 | boot_tty_putw( proc_id ); |
---|
721 | boot_tty_puts("\n"); |
---|
722 | boot_exit(); |
---|
723 | } |
---|
724 | |
---|
725 | // update number of tasks allocated to scheduler |
---|
726 | _scheduler[proc_id].tasks = loc_id + 1; |
---|
727 | |
---|
728 | // initializes the task context |
---|
729 | _scheduler[proc_id].context[loc_id][CTX_SR_ID] = sr; |
---|
730 | _scheduler[proc_id].context[loc_id][CTX_SP_ID] = sp; |
---|
731 | _scheduler[proc_id].context[loc_id][CTX_RA_ID] = ra; |
---|
732 | _scheduler[proc_id].context[loc_id][CTX_EPC_ID] = epc; |
---|
733 | _scheduler[proc_id].context[loc_id][CTX_TTY_ID] = tty; |
---|
734 | _scheduler[proc_id].context[loc_id][CTX_PTPR_ID] = ptpr; |
---|
735 | _scheduler[proc_id].context[loc_id][CTX_MODE_ID] = mode; |
---|
736 | |
---|
737 | #if BOOT_DEBUG_CTX |
---|
738 | boot_tty_puts("Task "); |
---|
739 | boot_tty_puts( task[task_id].name ); |
---|
740 | boot_tty_puts(" allocated to processor "); |
---|
741 | boot_tty_putw( proc_id ); |
---|
742 | boot_tty_puts(" / loc_id = "); |
---|
743 | boot_tty_putw( loc_id ); |
---|
744 | boot_tty_puts("\n"); |
---|
745 | |
---|
746 | boot_tty_puts(" - SR = "); |
---|
747 | boot_tty_putw( sr ); |
---|
748 | boot_tty_puts(" saved at "); |
---|
749 | boot_tty_putw( (unsigned int)&_scheduler[proc_id].context[loc_id][CTX_SR_ID] ); |
---|
750 | boot_tty_puts("\n"); |
---|
751 | |
---|
752 | boot_tty_puts(" - RA = "); |
---|
753 | boot_tty_putw( ra ); |
---|
754 | boot_tty_puts(" saved at "); |
---|
755 | boot_tty_putw( (unsigned int)&_scheduler[proc_id].context[loc_id][CTX_RA_ID] ); |
---|
756 | boot_tty_puts("\n"); |
---|
757 | |
---|
758 | boot_tty_puts(" - SP = "); |
---|
759 | boot_tty_putw( sp ); |
---|
760 | boot_tty_puts(" saved at "); |
---|
761 | boot_tty_putw( (unsigned int)&_scheduler[proc_id].context[loc_id][CTX_SP_ID] ); |
---|
762 | boot_tty_puts("\n"); |
---|
763 | |
---|
764 | boot_tty_puts(" - EPC = "); |
---|
765 | boot_tty_putw( epc ); |
---|
766 | boot_tty_puts(" saved at "); |
---|
767 | boot_tty_putw( (unsigned int)&_scheduler[proc_id].context[loc_id][CTX_EPC_ID] ); |
---|
768 | boot_tty_puts("\n"); |
---|
769 | |
---|
770 | boot_tty_puts(" - TTY = "); |
---|
771 | boot_tty_putw( tty ); |
---|
772 | boot_tty_puts(" saved at "); |
---|
773 | boot_tty_putw( (unsigned int)&_scheduler[proc_id].context[loc_id][CTX_TTY_ID] ); |
---|
774 | boot_tty_puts("\n"); |
---|
775 | |
---|
776 | boot_tty_puts(" - PTPR = "); |
---|
777 | boot_tty_putw( ptpr<<13 ); |
---|
778 | boot_tty_puts(" saved at "); |
---|
779 | boot_tty_putw( (unsigned int)&_scheduler[proc_id].context[loc_id][CTX_PTPR_ID] ); |
---|
780 | boot_tty_puts("\n"); |
---|
781 | |
---|
782 | boot_tty_puts(" - MODE = "); |
---|
783 | boot_tty_putw( mode ); |
---|
784 | boot_tty_puts(" saved at "); |
---|
785 | boot_tty_putw( (unsigned int)&_scheduler[proc_id].context[loc_id][CTX_MODE_ID] ); |
---|
786 | boot_tty_puts("\n"); |
---|
787 | #endif |
---|
788 | |
---|
789 | } // end boot_task_map() |
---|
790 | |
---|
791 | /////////////////////////////////////////////////////////////////////////// |
---|
792 | // This function compute the physical base address for a vseg |
---|
793 | // as specified in the mapping info data structure. |
---|
794 | // It updates the pbase field of the vseg. |
---|
795 | // It updates the page allocator (nextfreepage field of the pseg), |
---|
796 | // and checks a possible pseg overflow. |
---|
797 | /////////////////////////////////////////////////////////////////////////// |
---|
798 | in_boot void boot_vseg_map( mapping_vseg_t* vseg ) |
---|
799 | { |
---|
800 | unsigned int pages; |
---|
801 | |
---|
802 | // check vseg alignment on 4K pages |
---|
803 | if ( (vseg->vbase & 0xfff) != 0 ) |
---|
804 | { |
---|
805 | boot_tty_puts("\n[BOOT ERROR] in boot_vseg_map() function\n"); |
---|
806 | boot_tty_puts("virtual segment base address not aligned: "); |
---|
807 | boot_tty_puts( vseg->name ); |
---|
808 | boot_tty_puts("\n"); |
---|
809 | boot_exit(); |
---|
810 | } |
---|
811 | |
---|
812 | // computes number of pages |
---|
813 | pages = vseg->length >> 12; |
---|
814 | if ( (vseg->length & 0xFFF) != 0 ) pages++; |
---|
815 | |
---|
816 | // get physical segment pointer |
---|
817 | mapping_pseg_t* pseg = boot_pseg_get( vseg->psegid ); |
---|
818 | |
---|
819 | // compute physical base address |
---|
820 | if ( vseg->ident != 0 ) // identity mapping required |
---|
821 | { |
---|
822 | // check physical segment overflow |
---|
823 | if ( (vseg->vbase < pseg->base) || |
---|
824 | ((vseg->vbase + vseg->length) > (pseg->base + pseg->length)) ) |
---|
825 | { |
---|
826 | boot_tty_puts("\n[BOOT ERROR] in boot_vseg_map() function\n"); |
---|
827 | boot_tty_puts("impossible identity mapping for virtual segment: "); |
---|
828 | boot_tty_puts( vseg->name ); |
---|
829 | boot_tty_puts("\n"); |
---|
830 | boot_exit(); |
---|
831 | } |
---|
832 | vseg->pbase = vseg->vbase; |
---|
833 | } |
---|
834 | else // unconstrained mapping |
---|
835 | { |
---|
836 | // check physical segment overflow |
---|
837 | if ( (vseg->vbase + vseg->length) > (pseg->base + pseg->length) ) |
---|
838 | { |
---|
839 | boot_tty_puts("\n[BOOT ERROR] in boot_vseg_map() function\n"); |
---|
840 | boot_tty_puts("physical segment "); |
---|
841 | boot_tty_puts( pseg->name ); |
---|
842 | boot_tty_puts(" is too small to map virtual segment"); |
---|
843 | boot_tty_puts( vseg->name ); |
---|
844 | boot_tty_puts("\n"); |
---|
845 | boot_exit(); |
---|
846 | } |
---|
847 | vseg->pbase = pseg->base + (pseg->next_free_page<<12); |
---|
848 | pseg->next_free_page = pseg->next_free_page + pages; |
---|
849 | } |
---|
850 | |
---|
851 | #if BOOT_DEBUG_PT |
---|
852 | boot_tty_puts("- vseg "); |
---|
853 | boot_tty_puts( vseg->name ); |
---|
854 | boot_tty_puts(" : vbase = "); |
---|
855 | boot_tty_putw( vseg->vbase ); |
---|
856 | boot_tty_puts(" / pbase = "); |
---|
857 | boot_tty_putw( vseg->pbase ); |
---|
858 | boot_tty_puts("\n"); |
---|
859 | #endif |
---|
860 | |
---|
861 | } // end boot_vseg_map() |
---|
862 | |
---|
863 | ///////////////////////////////////////////////////////////////////// |
---|
864 | // This function cheks the mapping_info data structure |
---|
865 | ///////////////////////////////////////////////////////////////////// |
---|
866 | in_boot void boot_check_mapping() |
---|
867 | { |
---|
868 | mapping_header_t* header = (mapping_header_t*)&seg_boot_mapping_base; |
---|
869 | |
---|
870 | // checking mapping availability |
---|
871 | if ( header->signature != IN_MAPPING_SIGNATURE ) |
---|
872 | { |
---|
873 | boot_tty_puts("\n[BOOT ERROR] Illegal mapping signature: "); |
---|
874 | boot_tty_putw(header->signature); |
---|
875 | boot_tty_puts("\n"); |
---|
876 | boot_exit(); |
---|
877 | } |
---|
878 | |
---|
879 | #if BOOT_DEBUG_VIEW |
---|
880 | boot_print_mapping_info(); |
---|
881 | #endif |
---|
882 | |
---|
883 | // checking double definition of NB_CLUSTERS |
---|
884 | if ( header->clusters != NB_CLUSTERS ) |
---|
885 | { |
---|
886 | boot_tty_puts("\n[BOOT ERROR] Incoherent NB_CLUSTERS"); |
---|
887 | boot_tty_puts("\n - In giet_config, value = "); |
---|
888 | boot_tty_putw ( NB_CLUSTERS ); |
---|
889 | boot_tty_puts("\n - In mapping_info, value = "); |
---|
890 | boot_tty_putw ( header->clusters ); |
---|
891 | boot_tty_puts("\n"); |
---|
892 | boot_exit(); |
---|
893 | } |
---|
894 | |
---|
895 | // checking double definition of NB_TTYS |
---|
896 | if ( header->ttys != NB_TTYS ) |
---|
897 | { |
---|
898 | boot_tty_puts("\n[BOOT ERROR] Incoherent NB_TTYS"); |
---|
899 | boot_tty_puts("\n - In giet_config, value = "); |
---|
900 | boot_tty_putw ( NB_TTYS ); |
---|
901 | boot_tty_puts("\n - In mapping_info, value = "); |
---|
902 | boot_tty_putw ( header->ttys ); |
---|
903 | boot_tty_puts("\n"); |
---|
904 | boot_exit(); |
---|
905 | } |
---|
906 | |
---|
907 | // GIET_NB_PT2_MAX must be even |
---|
908 | if ( (GIET_NB_PT2_MAX & 0x1) != 0 ) |
---|
909 | { |
---|
910 | boot_tty_puts("\n[BOOT ERROR] : GIET_NB_PT2_MAX must be an even numver\n"); |
---|
911 | boot_tty_puts("\n"); |
---|
912 | boot_exit(); |
---|
913 | } |
---|
914 | |
---|
915 | // number of virtual spaces no larger than GIET_NB_VSPACE_MAX |
---|
916 | if ( header->vspaces > GIET_NB_VSPACE_MAX ) |
---|
917 | { |
---|
918 | boot_tty_puts("\n[BOOT ERROR] : number of vspaces > GIET_NB_VSPACE_MAX\n"); |
---|
919 | boot_tty_puts("\n"); |
---|
920 | boot_exit(); |
---|
921 | } |
---|
922 | } // end boot_check_mapping() |
---|
923 | |
---|
924 | ///////////////////////////////////////////////////////////////////// |
---|
925 | // This function builds the page tables for all virtual spaces |
---|
926 | // defined in the mapping_info data structure. |
---|
927 | // For each virtual space, it maps both the global virtual segments |
---|
928 | // (replicated in all vspaces), and the private virtuals segments. |
---|
929 | ///////////////////////////////////////////////////////////////////// |
---|
930 | in_boot void boot_pt_init() |
---|
931 | { |
---|
932 | mapping_header_t* header = (mapping_header_t*)&seg_boot_mapping_base; |
---|
933 | |
---|
934 | mapping_vspace_t* vspace = boot_get_vspace_base( header ); |
---|
935 | mapping_pseg_t* pseg = boot_get_pseg_base( header ); |
---|
936 | mapping_vseg_t* vseg = boot_get_vseg_base( header ); |
---|
937 | |
---|
938 | unsigned int vspace_id; |
---|
939 | unsigned int vseg_id; |
---|
940 | unsigned int pseg_id; |
---|
941 | |
---|
942 | // first loop on virtual spaces to map global vsegs |
---|
943 | for ( vspace_id = 0 ; vspace_id < header->vspaces ; vspace_id++ ) |
---|
944 | { |
---|
945 | |
---|
946 | #if BOOT_DEBUG_PT |
---|
947 | boot_tty_puts("\n******* mapping global vsegs in vspace "); |
---|
948 | boot_tty_puts(vspace[vspace_id].name); |
---|
949 | boot_tty_puts(" ********\n"); |
---|
950 | #endif |
---|
951 | |
---|
952 | // physical page allocators must be re-initialised for each vspace |
---|
953 | for ( pseg_id = 0 ; pseg_id < header->psegs ; pseg_id++ ) |
---|
954 | { |
---|
955 | pseg[pseg_id].next_free_page = 0; |
---|
956 | } |
---|
957 | |
---|
958 | for ( vseg_id = 0 ; vseg_id < header->globals ; vseg_id++ ) |
---|
959 | { |
---|
960 | boot_vseg_map( &vseg[vseg_id] ); |
---|
961 | } |
---|
962 | } |
---|
963 | |
---|
964 | // second loop on virtual spaces to map private vsegs |
---|
965 | for ( vspace_id = 0 ; vspace_id < header->vspaces ; vspace_id++ ) |
---|
966 | { |
---|
967 | |
---|
968 | #if BOOT_DEBUG_PT |
---|
969 | boot_tty_puts("\n******* mapping private vsegs in vspace "); |
---|
970 | boot_tty_puts(vspace[vspace_id].name); |
---|
971 | boot_tty_puts(" ********\n"); |
---|
972 | #endif |
---|
973 | |
---|
974 | for ( vseg_id = vspace[vspace_id].vseg_offset ; |
---|
975 | vseg_id < (vspace[vspace_id].vseg_offset + vspace[vspace_id].vsegs) ; |
---|
976 | vseg_id++ ) |
---|
977 | { |
---|
978 | boot_vseg_map( &vseg[vseg_id] ); |
---|
979 | } |
---|
980 | } |
---|
981 | |
---|
982 | // third loop on the vspaces to build the page tables |
---|
983 | for ( vspace_id = 0 ; vspace_id < header->vspaces ; vspace_id++ ) |
---|
984 | { |
---|
985 | |
---|
986 | #if BOOT_DEBUG_PT |
---|
987 | boot_tty_puts("\n******* building page table for vspace "); |
---|
988 | boot_tty_puts(vspace[vspace_id].name); |
---|
989 | boot_tty_puts(" ********\n"); |
---|
990 | #endif |
---|
991 | |
---|
992 | boot_vspace_pt_build( vspace_id ); |
---|
993 | } |
---|
994 | } // end boot_pt_init() |
---|
995 | |
---|
996 | /////////////////////////////////////////////////////////////////////////////// |
---|
997 | // This function sets the schedulers default values for all processors |
---|
998 | // (tasks <= 0, and current <= 0). |
---|
999 | // Then it scan all tasks (in all vspaces) to initialise the schedulers, |
---|
1000 | // the tasks contexts, as defined in the mapping_info data structure. |
---|
1001 | // A global TTY index is allocated to each task, as specified in the mapping. |
---|
1002 | // TTY0 is reserved for the kernel. |
---|
1003 | /////////////////////////////////////////////////////////////////////////////// |
---|
1004 | in_boot void boot_tcg_init() |
---|
1005 | { |
---|
1006 | mapping_header_t* header = (mapping_header_t*)&seg_boot_mapping_base; |
---|
1007 | |
---|
1008 | mapping_vspace_t* vspace = boot_get_vspace_base( header ); |
---|
1009 | mapping_vseg_t* vseg = boot_get_vseg_base( header ); |
---|
1010 | mapping_cluster_t* cluster = boot_get_cluster_base( header ); |
---|
1011 | |
---|
1012 | unsigned int* start_vector_base; |
---|
1013 | |
---|
1014 | unsigned int base_tty_id = 1; // TTY allocator |
---|
1015 | |
---|
1016 | unsigned int cluster_id; |
---|
1017 | unsigned int proc_id; |
---|
1018 | unsigned int vspace_id; |
---|
1019 | unsigned int task_id; |
---|
1020 | |
---|
1021 | // initialise the schedulers (not done by the compiler/loader) |
---|
1022 | for ( cluster_id = 0 ; cluster_id < header->clusters ; cluster_id++ ) |
---|
1023 | { |
---|
1024 | for ( proc_id = 0 ; proc_id < cluster[cluster_id].procs ; proc_id++ ) |
---|
1025 | { |
---|
1026 | if ( proc_id >= NB_PROCS ) |
---|
1027 | { |
---|
1028 | boot_tty_puts("\n[BOOT ERROR] The number of processors in cluster "); |
---|
1029 | boot_tty_putw( cluster_id ); |
---|
1030 | boot_tty_puts(" is larger than NB_PROCS \n"); |
---|
1031 | boot_exit(); |
---|
1032 | } |
---|
1033 | _scheduler[cluster_id*NB_PROCS+proc_id].tasks = 0; |
---|
1034 | _scheduler[cluster_id*NB_PROCS+proc_id].current = 0; |
---|
1035 | } |
---|
1036 | } |
---|
1037 | |
---|
1038 | // main loop on the virtual spaces |
---|
1039 | for ( vspace_id = 0 ; vspace_id < header->vspaces ; vspace_id++ ) |
---|
1040 | { |
---|
1041 | |
---|
1042 | #if BOOT_DEBUG_CTX |
---|
1043 | boot_tty_puts("\n******* mapping tasks and channels in vspace "); |
---|
1044 | boot_tty_puts(vspace[vspace_id].name); |
---|
1045 | boot_tty_puts(" ********\n"); |
---|
1046 | #endif |
---|
1047 | |
---|
1048 | // Get the physical address of the start_vector for the vspace. |
---|
1049 | // The start_vector is stored at the beginning of the seg_data segment, |
---|
1050 | // and contains the start addresses for all tasks defined in a vspace. |
---|
1051 | // The seg_data segment must be the first vseg defined in |
---|
1052 | // the mapping_info data structure. |
---|
1053 | mapping_vseg_t* vseg_data = &vseg[ vspace[vspace_id].vseg_offset]; |
---|
1054 | start_vector_base = (unsigned int*)boot_translate( vseg_data->vbase, |
---|
1055 | vspace_id ); |
---|
1056 | // map tasks |
---|
1057 | for ( task_id = vspace[vspace_id].task_offset ; |
---|
1058 | task_id < (vspace[vspace_id].task_offset + vspace[vspace_id].tasks) ; |
---|
1059 | task_id++ ) |
---|
1060 | { |
---|
1061 | boot_task_map( task_id, |
---|
1062 | vspace_id, |
---|
1063 | base_tty_id, |
---|
1064 | start_vector_base ); |
---|
1065 | } |
---|
1066 | |
---|
1067 | // increment TTY allocator |
---|
1068 | base_tty_id = base_tty_id + vspace[vspace_id].ttys; |
---|
1069 | } |
---|
1070 | } // end boot_tc_init() |
---|
1071 | |
---|
1072 | ///////////////////////////////////////////////////////////////////// |
---|
1073 | // This function signals the mapping completion by writing |
---|
1074 | // a new value in the mapping_info signature. |
---|
1075 | ///////////////////////////////////////////////////////////////////// |
---|
1076 | in_boot void boot_mapping_done() |
---|
1077 | { |
---|
1078 | mapping_header_t* header = (mapping_header_t*)&seg_boot_mapping_base; |
---|
1079 | header->signature = OUT_MAPPING_SIGNATURE; |
---|
1080 | } // end boot_mapping_done() |
---|
1081 | |
---|
1082 | //////////////////////////////////////////////////////////////////////////////// |
---|
1083 | // boot_peri_init() |
---|
1084 | // This generic function initializes the interrupt vector, the ICU masks, |
---|
1085 | // and the timers for the context switch. |
---|
1086 | // The hardware parameters are NB_CLUSTERS, NB_PROCS, NB_TIMERS, NB_DMAS |
---|
1087 | // CLUSTER_SPAN, seg_icu_base, seg_timer_base. |
---|
1088 | // The number of processor per cluster cannot be larger than 8. |
---|
1089 | // The total number of TTYs cannot be larger than 15. |
---|
1090 | // The NB_TIMERS, NB_DMAS & NB_PROCS parameters must be equal. |
---|
1091 | //////////////////////////////////////////////////////////////////////////////// |
---|
1092 | in_boot void boot_peri_init() |
---|
1093 | { |
---|
1094 | mapping_header_t* header = (mapping_header_t*)&seg_boot_mapping_base; |
---|
1095 | mapping_cluster_t* cluster = boot_get_cluster_base( header ); |
---|
1096 | |
---|
1097 | unsigned int cluster_id; |
---|
1098 | |
---|
1099 | if ( NB_TIMERS != NB_PROCS ) |
---|
1100 | { |
---|
1101 | boot_tty_puts("\n[BOOT ERROR] NB_TIMERS != NB_PROCS\n"); |
---|
1102 | boot_exit(); |
---|
1103 | } |
---|
1104 | if ( NB_DMAS != NB_PROCS ) |
---|
1105 | { |
---|
1106 | boot_tty_puts("\n[BOOT ERROR] NB_DMAS != NB_PROCS\n"); |
---|
1107 | boot_exit(); |
---|
1108 | } |
---|
1109 | |
---|
1110 | // interrupt vector initialisation |
---|
1111 | |
---|
1112 | _interrupt_vector[0] = &_isr_ioc; |
---|
1113 | |
---|
1114 | _interrupt_vector[1] = &_isr_tty_get_0; |
---|
1115 | _interrupt_vector[2] = &_isr_tty_get_1; |
---|
1116 | _interrupt_vector[3] = &_isr_tty_get_2; |
---|
1117 | _interrupt_vector[4] = &_isr_tty_get_3; |
---|
1118 | _interrupt_vector[5] = &_isr_tty_get_4; |
---|
1119 | _interrupt_vector[6] = &_isr_tty_get_5; |
---|
1120 | _interrupt_vector[7] = &_isr_tty_get_6; |
---|
1121 | _interrupt_vector[8] = &_isr_tty_get_7; |
---|
1122 | _interrupt_vector[9] = &_isr_tty_get_8; |
---|
1123 | _interrupt_vector[10] = &_isr_tty_get_9; |
---|
1124 | _interrupt_vector[11] = &_isr_tty_get_10; |
---|
1125 | _interrupt_vector[12] = &_isr_tty_get_11; |
---|
1126 | _interrupt_vector[13] = &_isr_tty_get_12; |
---|
1127 | _interrupt_vector[14] = &_isr_tty_get_13; |
---|
1128 | _interrupt_vector[14] = &_isr_tty_get_14; |
---|
1129 | |
---|
1130 | |
---|
1131 | _interrupt_vector[16] = &_isr_switch; |
---|
1132 | _interrupt_vector[17] = &_isr_dma; |
---|
1133 | _interrupt_vector[18] = &_isr_switch; |
---|
1134 | _interrupt_vector[19] = &_isr_dma; |
---|
1135 | _interrupt_vector[20] = &_isr_switch; |
---|
1136 | _interrupt_vector[21] = &_isr_dma; |
---|
1137 | _interrupt_vector[22] = &_isr_switch; |
---|
1138 | _interrupt_vector[23] = &_isr_dma; |
---|
1139 | _interrupt_vector[24] = &_isr_switch; |
---|
1140 | _interrupt_vector[25] = &_isr_dma; |
---|
1141 | _interrupt_vector[26] = &_isr_switch; |
---|
1142 | _interrupt_vector[27] = &_isr_dma; |
---|
1143 | _interrupt_vector[28] = &_isr_switch; |
---|
1144 | _interrupt_vector[29] = &_isr_dma; |
---|
1145 | _interrupt_vector[30] = &_isr_switch; |
---|
1146 | _interrupt_vector[31] = &_isr_dma; |
---|
1147 | |
---|
1148 | // ICU MASKs and TIMERS initialisation |
---|
1149 | |
---|
1150 | volatile unsigned int* icu = (unsigned int*)&seg_icu_base; |
---|
1151 | volatile unsigned int* timer = (unsigned int*)&seg_timer_base; |
---|
1152 | |
---|
1153 | for ( cluster_id = 0 ; cluster_id < header->clusters ; cluster_id++ ) |
---|
1154 | { |
---|
1155 | if ( cluster[cluster_id].procs == 0 ) break; |
---|
1156 | |
---|
1157 | icu[ICU_MASK_SET + 0*ICU_SPAN] = 0x000380FF; // ICU_MASK for proc 0 |
---|
1158 | if ( _scheduler[cluster_id*NB_PROCS + 0].tasks > 1 ) |
---|
1159 | { |
---|
1160 | timer[TIMER_PERIOD + 0*TIMER_SPAN] = GIET_TICK_VALUE; |
---|
1161 | timer[TIMER_MODE + 0*TIMER_SPAN] = 0x3; |
---|
1162 | } |
---|
1163 | |
---|
1164 | if ( cluster[cluster_id].procs == 1 ) break; |
---|
1165 | |
---|
1166 | icu[ICU_MASK_SET + 1*ICU_SPAN] = 0x000C0000; // ICU_MASK for proc 1 |
---|
1167 | if ( _scheduler[cluster_id*NB_PROCS + 1].tasks > 1 ) |
---|
1168 | { |
---|
1169 | timer[TIMER_PERIOD + 1*TIMER_SPAN] = GIET_TICK_VALUE; |
---|
1170 | timer[TIMER_MODE + 1*TIMER_SPAN] = 0x3; |
---|
1171 | } |
---|
1172 | |
---|
1173 | if ( cluster[cluster_id].procs == 2 ) break; |
---|
1174 | |
---|
1175 | icu[ICU_MASK_SET + 2*ICU_SPAN] = 0x00300000; // ICU_MASK for proc 2 |
---|
1176 | if ( _scheduler[cluster_id*NB_PROCS + 2].tasks > 1 ) |
---|
1177 | { |
---|
1178 | timer[TIMER_PERIOD + 2*TIMER_SPAN] = GIET_TICK_VALUE; |
---|
1179 | timer[TIMER_MODE + 2*TIMER_SPAN] = 0x3; |
---|
1180 | } |
---|
1181 | |
---|
1182 | if ( cluster[cluster_id].procs == 3 ) break; |
---|
1183 | |
---|
1184 | icu[ICU_MASK_SET + 3*ICU_SPAN] = 0x00C00000; // ICU_MASK for proc 3 |
---|
1185 | if ( _scheduler[cluster_id*NB_PROCS + 3].tasks > 1 ) |
---|
1186 | { |
---|
1187 | timer[TIMER_PERIOD + 3*TIMER_SPAN] = GIET_TICK_VALUE; |
---|
1188 | timer[TIMER_MODE + 3*TIMER_SPAN] = 0x3; |
---|
1189 | } |
---|
1190 | |
---|
1191 | if ( cluster[cluster_id].procs == 4 ) break; |
---|
1192 | icu[ICU_MASK_SET + 4*ICU_SPAN] = 0x03000000; // ICU_MASK for proc 4 |
---|
1193 | |
---|
1194 | if ( _scheduler[cluster_id*NB_PROCS + 4].tasks > 1 ) |
---|
1195 | { |
---|
1196 | timer[TIMER_PERIOD + 4*TIMER_SPAN] = GIET_TICK_VALUE; |
---|
1197 | timer[TIMER_MODE + 4*TIMER_SPAN] = 0x3; |
---|
1198 | } |
---|
1199 | |
---|
1200 | if ( cluster[cluster_id].procs == 5 ) break; |
---|
1201 | |
---|
1202 | icu[ICU_MASK_SET + 5*ICU_SPAN] = 0x0C000000; // ICU_MASK for proc 5 |
---|
1203 | if ( _scheduler[cluster_id*NB_PROCS + 5].tasks > 1 ) |
---|
1204 | { |
---|
1205 | timer[TIMER_PERIOD + 5*TIMER_SPAN] = GIET_TICK_VALUE; |
---|
1206 | timer[TIMER_MODE + 5*TIMER_SPAN] = 0x3; |
---|
1207 | } |
---|
1208 | |
---|
1209 | if ( cluster[cluster_id].procs == 6 ) break; |
---|
1210 | |
---|
1211 | icu[ICU_MASK_SET + 6*ICU_SPAN] = 0x30000000; // ICU_MASK for proc 6 |
---|
1212 | if ( _scheduler[cluster_id*NB_PROCS + 6].tasks > 1 ) |
---|
1213 | { |
---|
1214 | timer[TIMER_PERIOD + 6*TIMER_SPAN] = GIET_TICK_VALUE; |
---|
1215 | timer[TIMER_MODE + 6*TIMER_SPAN] = 0x3; |
---|
1216 | } |
---|
1217 | |
---|
1218 | if ( cluster[cluster_id].procs == 7 ) break; |
---|
1219 | |
---|
1220 | icu[ICU_MASK_SET + 7*ICU_SPAN] = 0xC0000000; // ICU_MASK for proc 7 |
---|
1221 | if ( _scheduler[cluster_id*NB_PROCS + 7].tasks > 1 ) |
---|
1222 | { |
---|
1223 | timer[TIMER_PERIOD + 7*TIMER_SPAN] = GIET_TICK_VALUE; |
---|
1224 | timer[TIMER_MODE + 7*TIMER_SPAN] = 0x3; |
---|
1225 | } |
---|
1226 | |
---|
1227 | if ( cluster[cluster_id].procs > 8 ) |
---|
1228 | { |
---|
1229 | boot_tty_puts("\n[BOOT ERROR] The number of processors per cluster\n"); |
---|
1230 | boot_tty_puts(" cannot be larger than 8\n"); |
---|
1231 | boot_exit(); |
---|
1232 | } |
---|
1233 | icu = icu + (CLUSTER_SPAN>>2); |
---|
1234 | timer = timer + (CLUSTER_SPAN>>2); |
---|
1235 | } |
---|
1236 | } // end boot_peri_init() |
---|
1237 | |
---|
1238 | //////////////////////////////////////////////////////////////////////////////////// |
---|
1239 | // boot_init() |
---|
1240 | // This function is executed by one single processor to initialize the page |
---|
1241 | // tables, the tasks contexts and the peripherals, for all applications. |
---|
1242 | //////////////////////////////////////////////////////////////////////////////////// |
---|
1243 | in_boot void boot_init() |
---|
1244 | { |
---|
1245 | // checking mapping_info |
---|
1246 | boot_check_mapping(); |
---|
1247 | |
---|
1248 | // building page tables |
---|
1249 | boot_pt_init(); |
---|
1250 | boot_tty_puts("\n[BOOT] Page Tables completed at cycle "); |
---|
1251 | boot_tty_putw( boot_time() ); |
---|
1252 | boot_tty_puts("\n"); |
---|
1253 | |
---|
1254 | // building tasks contexts |
---|
1255 | boot_tcg_init(); |
---|
1256 | boot_tty_puts("\n[BOOT] Task Contexts completed at cycle "); |
---|
1257 | boot_tty_putw( boot_time() ); |
---|
1258 | boot_tty_puts("\n"); |
---|
1259 | |
---|
1260 | // Initialize peripherals |
---|
1261 | boot_peri_init(); |
---|
1262 | boot_tty_puts("\n[BOOT] Peripherals completed at cycle "); |
---|
1263 | boot_tty_putw( boot_time() ); |
---|
1264 | boot_tty_puts("\n"); |
---|
1265 | |
---|
1266 | // signals completion to all processors |
---|
1267 | boot_mapping_done(); |
---|
1268 | |
---|
1269 | } // end boot_init() |
---|
1270 | |
---|
1271 | // Local Variables: |
---|
1272 | // tab-width: 4 |
---|
1273 | // c-basic-offset: 4 |
---|
1274 | // c-file-offsets:((innamespace . 0)(inline-open . 0)) |
---|
1275 | // indent-tabs-mode: nil |
---|
1276 | // End: |
---|
1277 | |
---|
1278 | // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=4:softtabstop=4 |
---|
1279 | |
---|