1 | /* |
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2 | * hal_init.c - C initialization procedure for x86. |
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3 | * |
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4 | * Copyright (c) 2017 Maxime Villard |
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5 | * |
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6 | * This file is part of ALMOS-MKH. |
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7 | * |
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8 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
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9 | * under the terms of the GNU General Public License as published by |
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10 | * the Free Software Foundation; version 2.0 of the License. |
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11 | * |
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12 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
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13 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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15 | * General Public License for more details. |
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16 | * |
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17 | * You should have received a copy of the GNU General Public License |
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18 | * along with ALMOS-MKH.; if not, write to the Free Software Foundation, |
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19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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20 | */ |
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21 | |
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22 | #include <hal_types.h> |
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23 | #include <hal_boot.h> |
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24 | #include <hal_multiboot.h> |
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25 | #include <hal_segmentation.h> |
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26 | #include <hal_acpi.h> |
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27 | #include <hal_apic.h> |
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28 | #include <hal_internal.h> |
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29 | #include <hal_remote.h> |
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30 | |
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31 | #include <memcpy.h> |
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32 | #include <thread.h> |
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33 | #include <string.h> |
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34 | #include <process.h> |
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35 | #include <printk.h> |
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36 | #include <vmm.h> |
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37 | #include <core.h> |
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38 | #include <cluster.h> |
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39 | #include <chdev.h> |
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40 | |
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41 | #include <boot_info.h> |
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42 | |
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43 | void kernel_init(boot_info_t *info); |
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44 | |
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45 | static void gdt_create(); |
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46 | static void idt_create(); |
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47 | void cpu_attach(); |
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48 | |
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49 | size_t mytest __in_kdata = 0; |
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50 | |
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51 | struct multiboot_info mb_info __in_kdata; |
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52 | char mb_loader_name[PAGE_SIZE] __in_kdata; |
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53 | uint8_t mb_mmap[PAGE_SIZE] __in_kdata; |
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54 | |
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55 | /* -------------------------------------------------------------------------- */ |
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56 | |
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57 | static void |
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58 | dump_memmap() |
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59 | { |
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60 | size_t mmap_length = mb_info.mi_mmap_length; |
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61 | uint8_t *mmap_addr = (uint8_t *)&mb_mmap; |
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62 | size_t i; |
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63 | |
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64 | if (!(mb_info.mi_flags & MULTIBOOT_INFO_HAS_MMAP)) |
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65 | x86_panic("No mmap"); |
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66 | |
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67 | i = 0; |
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68 | while (i < mmap_length) { |
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69 | struct multiboot_mmap *mm; |
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70 | |
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71 | mm = (struct multiboot_mmap *)(mmap_addr + i); |
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72 | |
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73 | x86_printf("-> [%Z, %Z] %s\n", mm->mm_base_addr, |
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74 | mm->mm_base_addr + mm->mm_length, |
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75 | (mm->mm_type == 1) ? "ram" : "rsv" ); |
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76 | |
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77 | i += mm->mm_size + 4; |
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78 | } |
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79 | } |
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80 | |
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81 | static void init_bootinfo_core(boot_core_t *core) |
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82 | { |
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83 | memset(core, 0, sizeof(boot_core_t)); |
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84 | |
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85 | core->gid = hal_lapic_gid(); |
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86 | core->lid = 0; |
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87 | core->cxy = 0; |
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88 | } |
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89 | |
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90 | static void init_bootinfo_txt(boot_device_t *dev) |
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91 | { |
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92 | memset(dev, 0, sizeof(boot_device_t)); |
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93 | |
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94 | dev->base = 0xB8000; |
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95 | dev->type = (DEV_FUNC_TXT << 16) | IMPL_TXT_X86; |
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96 | dev->channels = 1; |
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97 | dev->param0 = 0; |
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98 | dev->param1 = 0; |
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99 | dev->param2 = 0; |
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100 | dev->param3 = 0; |
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101 | |
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102 | #ifdef NOTYET |
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103 | uint32_t irqs; /*! number of input IRQs */ |
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104 | boot_irq_t irq[32]; /*! array of input IRQS (PIC and ICU only) */ |
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105 | #endif |
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106 | } |
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107 | |
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108 | static void init_bootinfo(boot_info_t *info) |
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109 | { |
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110 | extern uint64_t __kernel_data_start; |
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111 | extern uint64_t __kernel_end; |
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112 | |
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113 | memset(info, 0, sizeof(boot_info_t)); |
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114 | |
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115 | info->signature = 0; |
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116 | |
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117 | info->paddr_width = 0; |
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118 | info->x_width = 1; |
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119 | info->y_width = 1; |
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120 | info->x_size = 1; |
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121 | info->y_size = 1; |
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122 | info->io_cxy = 0; |
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123 | |
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124 | info->ext_dev_nr = 1; |
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125 | init_bootinfo_txt(&info->ext_dev[0]); |
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126 | |
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127 | info->cxy = 0; |
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128 | info->cores_nr = 1; |
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129 | init_bootinfo_core(&info->core[0]); |
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130 | |
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131 | info->rsvd_nr = 0; |
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132 | /* rsvd XXX */ |
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133 | |
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134 | /* dev_ XXX */ |
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135 | |
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136 | info->pages_offset = 0; |
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137 | info->pages_nr = 0; |
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138 | |
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139 | info->kernel_code_start = (intptr_t)(KERNTEXTOFF - KERNBASE); |
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140 | info->kernel_code_end = (intptr_t)(&__kernel_data_start - KERNBASE) - 1; |
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141 | info->kernel_data_start = (intptr_t)(&__kernel_data_start - KERNBASE); |
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142 | info->kernel_code_end = (intptr_t)(&__kernel_end - KERNBASE) - 1; |
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143 | } |
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144 | |
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145 | void init_x86_64(paddr_t firstpa) |
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146 | { |
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147 | boot_info_t btinfo; |
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148 | |
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149 | x86_printf("[+] init_x86_64 called\n"); |
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150 | |
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151 | /* Create the global structures */ |
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152 | gdt_create(); |
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153 | idt_create(); |
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154 | |
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155 | /* Attach cpu0 */ |
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156 | cpu_attach(); |
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157 | x86_printf("[+] cpu_attach called\n"); |
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158 | |
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159 | x86_printf("[+] bootloader: '%s'\n", mb_loader_name); |
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160 | |
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161 | dump_memmap(); |
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162 | x86_printf("[+] dump finished\n"); |
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163 | |
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164 | hal_gpt_init(firstpa); |
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165 | x86_printf("[+] hal_gpt_init called\n"); |
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166 | |
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167 | hal_acpi_init(); |
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168 | x86_printf("[+] hal_acpi_init called\n"); |
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169 | |
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170 | hal_gpt_bootstrap_reset(); |
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171 | x86_printf("[+] hal_gpt_bootstrap_reset called\n"); |
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172 | |
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173 | hal_apic_init(); |
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174 | x86_printf("[+] hal_apic_init called\n"); |
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175 | |
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176 | hal_tls_init_cpu0(); |
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177 | x86_printf("[+] hal_tls_init_cpu0 called\n"); |
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178 | |
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179 | x86_printf("-> mytest = %z\n", mytest); |
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180 | |
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181 | xptr_t myptr = XPTR(0, &mytest); |
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182 | hal_remote_sb(myptr, 1); |
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183 | x86_printf("-> mytest = %z\n", hal_remote_lb(myptr)); |
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184 | |
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185 | init_bootinfo(&btinfo); |
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186 | kernel_init(&btinfo); |
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187 | x86_printf("[+] kernel_init called\n"); |
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188 | |
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189 | // void x86_stop(); |
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190 | // x86_stop(); |
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191 | |
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192 | sti(); |
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193 | |
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194 | int m = 0; |
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195 | int v = 1 / m; |
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196 | |
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197 | char *buf = NULL; |
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198 | *buf = (char)0x01; |
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199 | |
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200 | x86_printf("ALIVE!\n"); |
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201 | |
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202 | while (1); |
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203 | } |
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204 | |
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205 | /* -------------------------------------------------------------------------- */ |
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206 | |
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207 | uint8_t gdtstore[PAGE_SIZE] __in_kdata; |
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208 | uint8_t idtstore[PAGE_SIZE] __in_kdata; |
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209 | struct tss cpu0_tss __in_kdata; |
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210 | uint8_t cpu0_intr_stack[STKSIZE] __in_kdata; |
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211 | uint8_t cpu0_dbfl_stack[STKSIZE] __in_kdata; |
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212 | uint8_t cpu0_nmfl_stack[STKSIZE] __in_kdata; |
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213 | |
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214 | static void |
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215 | setregion(struct region_descriptor *rd, void *base, uint16_t limit) |
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216 | { |
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217 | rd->rd_limit = limit; |
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218 | rd->rd_base = (uint64_t)base; |
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219 | } |
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220 | |
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221 | /* -------------------------------------------------------------------------- */ |
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222 | |
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223 | static void |
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224 | gdt_set_memseg(struct gdt_memseg *sd, void *base, size_t limit, |
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225 | int type, int dpl, int gran, int is64) |
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226 | { |
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227 | sd->sd_lolimit = (unsigned)limit; |
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228 | sd->sd_lobase = (unsigned long)base; |
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229 | sd->sd_type = type; |
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230 | sd->sd_dpl = dpl; |
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231 | sd->sd_p = 1; |
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232 | sd->sd_hilimit = (unsigned)limit >> 16; |
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233 | sd->sd_avl = 0; |
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234 | sd->sd_long = is64; |
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235 | sd->sd_def32 = 0; |
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236 | sd->sd_gran = gran; |
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237 | sd->sd_hibase = (unsigned long)base >> 24; |
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238 | } |
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239 | |
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240 | static void |
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241 | gdt_set_sysseg(struct gdt_sysseg *sd, void *base, size_t limit, |
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242 | int type, int dpl, int gran) |
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243 | { |
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244 | memset(sd, 0, sizeof *sd); |
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245 | sd->sd_lolimit = (unsigned)limit; |
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246 | sd->sd_lobase = (uint64_t)base; |
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247 | sd->sd_type = type; |
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248 | sd->sd_dpl = dpl; |
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249 | sd->sd_p = 1; |
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250 | sd->sd_hilimit = (unsigned)limit >> 16; |
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251 | sd->sd_gran = gran; |
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252 | sd->sd_hibase = (uint64_t)base >> 24; |
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253 | } |
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254 | |
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255 | static void gdt_create() |
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256 | { |
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257 | memset(&gdtstore, 0, PAGE_SIZE); |
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258 | |
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259 | /* Flat segments */ |
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260 | gdt_set_memseg(GDT_ADDR_MEM(gdtstore, GDT_KCODE_SEL), 0, |
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261 | 0xfffff, SDT_MEMERA, SEL_KPL, 1, 1); |
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262 | gdt_set_memseg(GDT_ADDR_MEM(gdtstore, GDT_KDATA_SEL), 0, |
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263 | 0xfffff, SDT_MEMRWA, SEL_KPL, 1, 1); |
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264 | gdt_set_memseg(GDT_ADDR_MEM(gdtstore, GDT_UCODE_SEL), 0, |
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265 | 0xfffff, SDT_MEMERA, SEL_UPL, 1, 1); |
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266 | gdt_set_memseg(GDT_ADDR_MEM(gdtstore, GDT_UDATA_SEL), 0, |
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267 | 0xfffff, SDT_MEMRWA, SEL_UPL, 1, 1); |
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268 | } |
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269 | |
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270 | void cpu_load_gdt() |
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271 | { |
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272 | struct region_descriptor region; |
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273 | setregion(®ion, &gdtstore, PAGE_SIZE - 1); |
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274 | lgdt(®ion); |
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275 | } |
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276 | |
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277 | /* -------------------------------------------------------------------------- */ |
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278 | |
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279 | static void |
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280 | idt_set_seg(struct idt_seg *seg, void *func, int ist, int type, int dpl, int sel) |
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281 | { |
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282 | seg->gd_looffset = (uint64_t)func & 0xffff; |
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283 | seg->gd_selector = sel; |
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284 | seg->gd_ist = ist; |
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285 | seg->gd_type = type; |
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286 | seg->gd_dpl = dpl; |
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287 | seg->gd_p = 1; |
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288 | seg->gd_hioffset = (uint64_t)func >> 16; |
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289 | seg->gd_zero = 0; |
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290 | seg->gd_xx1 = 0; |
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291 | seg->gd_xx2 = 0; |
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292 | seg->gd_xx3 = 0; |
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293 | } |
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294 | |
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295 | static void idt_create() |
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296 | { |
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297 | extern uint64_t x86_traps[], x86_intrs[], x86_rsvd; |
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298 | struct idt_seg *idt; |
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299 | size_t i; |
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300 | |
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301 | idt = (struct idt_seg *)&idtstore; |
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302 | |
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303 | /* First, put a dead entry */ |
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304 | for (i = 0; i < NIDT; i++) { |
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305 | idt_set_seg(&idt[i], (void *)&x86_rsvd, 0, |
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306 | SDT_SYS386IGT, SEL_KPL, GDT_FIXED_SEL(GDT_KCODE_SEL, SEL_KPL)); |
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307 | } |
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308 | |
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309 | /* General exceptions */ |
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310 | for (i = CPUVEC_MIN; i < CPUVEC_MAX; i++) { |
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311 | idt_set_seg(&idt[i], (void *)x86_traps[i - CPUVEC_MIN], 0, |
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312 | SDT_SYS386IGT, SEL_KPL, GDT_FIXED_SEL(GDT_KCODE_SEL, SEL_KPL)); |
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313 | } |
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314 | |
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315 | /* LAPIC interrupts */ |
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316 | for (i = LAPICVEC_MIN; i < LAPICVEC_MAX; i++) { |
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317 | idt_set_seg(&idt[i], (void *)x86_intrs[i - LAPICVEC_MIN], 0, |
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318 | SDT_SYS386IGT, SEL_KPL, GDT_FIXED_SEL(GDT_KCODE_SEL, SEL_KPL)); |
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319 | } |
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320 | } |
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321 | |
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322 | void cpu_load_idt() |
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323 | { |
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324 | struct region_descriptor region; |
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325 | setregion(®ion, &idtstore, PAGE_SIZE - 1); |
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326 | lidt(®ion); |
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327 | } |
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328 | |
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329 | /* -------------------------------------------------------------------------- */ |
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330 | |
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331 | /* |
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332 | * The gdt bitmap must be per-cluster. |
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333 | */ |
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334 | int tss_alloc(struct tss *tss) |
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335 | { |
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336 | int slot; |
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337 | |
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338 | /* Once we have proper SMP support, we will change that */ |
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339 | slot = GDT_CPU0TSS_SEL; |
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340 | |
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341 | gdt_set_sysseg(GDT_ADDR_SYS(gdtstore, slot), tss, |
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342 | sizeof(*tss) - 1, SDT_SYS386TSS, SEL_KPL, 0); |
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343 | |
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344 | return GDT_DYNAM_SEL(slot, SEL_KPL); |
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345 | } |
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346 | |
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347 | void cpu_create_tss() |
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348 | { |
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349 | struct tss *tss = &cpu0_tss; |
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350 | int sel; |
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351 | |
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352 | /* Create the tss */ |
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353 | memset(tss, 0, sizeof(*tss)); |
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354 | tss->tss_iobase = IOMAP_INVALOFF << 16; |
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355 | tss->tss_ist[0] = (uint64_t)cpu0_intr_stack + STKSIZE; |
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356 | tss->tss_ist[1] = (uint64_t)cpu0_dbfl_stack + STKSIZE; |
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357 | tss->tss_ist[2] = (uint64_t)cpu0_nmfl_stack + STKSIZE; |
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358 | sel = tss_alloc(tss); |
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359 | |
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360 | /* Load it */ |
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361 | ltr(sel); |
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362 | } |
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363 | |
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364 | /* -------------------------------------------------------------------------- */ |
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365 | |
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366 | void cpu_attach() |
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367 | { |
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368 | cpu_load_gdt(); |
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369 | cpu_load_idt(); |
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370 | cpu_create_tss(); |
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371 | } |
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372 | |
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