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Rev | Author | Line No. | Line |
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1 | jermar | 1 | # |
2 | # Copyright (C) 2001-2004 Jakub Jermar |
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693 | decky | 3 | # Copyright (C) 2005-2006 Martin Decky |
1 | jermar | 4 | # All rights reserved. |
5 | # |
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6 | # Redistribution and use in source and binary forms, with or without |
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7 | # modification, are permitted provided that the following conditions |
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8 | # are met: |
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9 | # |
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10 | # - Redistributions of source code must retain the above copyright |
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11 | # notice, this list of conditions and the following disclaimer. |
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12 | # - Redistributions in binary form must reproduce the above copyright |
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13 | # notice, this list of conditions and the following disclaimer in the |
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14 | # documentation and/or other materials provided with the distribution. |
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15 | # - The name of the author may not be used to endorse or promote products |
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16 | # derived from this software without specific prior written permission. |
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17 | # |
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18 | # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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19 | # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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20 | # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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21 | # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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22 | # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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23 | # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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24 | # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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25 | # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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26 | # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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27 | # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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28 | # |
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29 | |||
222 | decky | 30 | #include <arch/boot/boot.h> |
506 | decky | 31 | #include <arch/boot/memmap.h> |
300 | palkovsky | 32 | #include <arch/mm/page.h> |
33 | #include <arch/pm.h> |
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222 | decky | 34 | |
693 | decky | 35 | #define START_STACK (BOOT_OFFSET - BOOT_STACK_SIZE) |
36 | |||
406 | jermar | 37 | .section K_TEXT_START, "ax" |
1 | jermar | 38 | |
267 | decky | 39 | KTEXT=8 |
40 | KDATA=16 |
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41 | |||
112 | jermar | 42 | .code32 |
222 | decky | 43 | .align 4 |
693 | decky | 44 | .global multiboot_image_start |
222 | decky | 45 | multiboot_header: |
46 | .long MULTIBOOT_HEADER_MAGIC |
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47 | .long MULTIBOOT_HEADER_FLAGS |
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48 | .long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS) # checksum |
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693 | decky | 49 | .long multiboot_header |
50 | .long unmapped_ktext_start |
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222 | decky | 51 | .long 0 |
52 | .long 0 |
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693 | decky | 53 | .long multiboot_image_start |
222 | decky | 54 | |
55 | multiboot_image_start: |
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693 | decky | 56 | movl $START_STACK, %esp # initialize stack pointer |
57 | lgdt KA2PA(bootstrap_gdtr) # initialize Global Descriptor Table register |
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112 | jermar | 58 | |
280 | decky | 59 | movw $KDATA, %cx |
60 | movw %cx, %es |
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61 | movw %cx, %gs |
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62 | movw %cx, %fs |
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693 | decky | 63 | movw %cx, %ds # kernel data + stack |
280 | decky | 64 | movw %cx, %ss |
235 | decky | 65 | |
693 | decky | 66 | jmpl $KTEXT, $multiboot_meeting_point |
271 | decky | 67 | multiboot_meeting_point: |
68 | |||
323 | jermar | 69 | pushl %ebx # save parameters from GRUB |
280 | decky | 70 | pushl %eax |
1287 | vana | 71 | |
72 | #ifdef CONFIG_FB |
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73 | mov $vesa_init,%esi; |
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74 | mov $VESA_INIT_SEGMENT<<4,%edi; |
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75 | mov $e_vesa_init-vesa_init,%ecx; |
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76 | cld; |
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77 | rep movsb; |
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78 | |||
79 | mov $VESA_INIT_SEGMENT<<4,%edi; |
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80 | call *%edi; |
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81 | mov %esi,KA2PA(vesa_ph_addr); |
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82 | mov %di,KA2PA(vesa_height); |
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83 | shr $16,%edi; |
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84 | mov %di,KA2PA(vesa_width); |
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85 | mov %bx,KA2PA(vesa_scanline); |
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86 | shr $16,%ebx; |
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87 | mov %bx,KA2PA(vesa_bpp); |
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88 | #endif |
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280 | decky | 89 | |
323 | jermar | 90 | call map_kernel # map kernel and turn paging on |
235 | decky | 91 | |
280 | decky | 92 | popl %eax |
93 | popl %ebx |
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323 | jermar | 94 | cmpl $MULTIBOOT_LOADER_MAGIC, %eax # compare GRUB signature |
280 | decky | 95 | je valid_boot |
96 | |||
285 | decky | 97 | xorl %ecx, %ecx # no memory size or map available |
98 | movl %ecx, e801memorysize |
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99 | movl %ecx, e820counter |
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100 | |||
280 | decky | 101 | jmp invalid_boot |
285 | decky | 102 | |
280 | decky | 103 | valid_boot: |
104 | |||
285 | decky | 105 | movl (%ebx), %eax # ebx = physical address of struct multiboot_info |
280 | decky | 106 | |
285 | decky | 107 | bt $0, %eax # mbi->flags[0] (mem_lower, mem_upper valid) |
108 | jc mem_valid |
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109 | |||
110 | xorl %ecx, %ecx |
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111 | jmp mem_invalid |
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112 | |||
113 | mem_valid: |
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114 | movl 4(%ebx), %ecx # mbi->mem_lower |
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115 | addl 8(%ebx), %ecx # mbi->mem_upper |
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280 | decky | 116 | |
285 | decky | 117 | mem_invalid: |
280 | decky | 118 | movl %ecx, e801memorysize |
119 | |||
1037 | decky | 120 | bt $3, %eax # mbi->flags[3] (mods_count, mods_addr valid) |
506 | decky | 121 | jc mods_valid |
122 | |||
123 | xorl %ecx, %ecx |
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1037 | decky | 124 | movl %ecx, init |
125 | jmp mods_end |
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506 | decky | 126 | |
127 | mods_valid: |
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1037 | decky | 128 | |
628 | decky | 129 | movl 20(%ebx), %ecx # mbi->mods_count |
1037 | decky | 130 | movl %ecx, init |
131 | |||
628 | decky | 132 | cmpl $0, %ecx |
1037 | decky | 133 | je mods_end |
506 | decky | 134 | |
628 | decky | 135 | movl 24(%ebx), %esi # mbi->mods_addr |
1037 | decky | 136 | movl $init, %edi |
628 | decky | 137 | |
1037 | decky | 138 | mods_loop: |
506 | decky | 139 | |
1037 | decky | 140 | movl 0(%esi), %edx # mods->mod_start |
141 | addl $0x80000000, %edx |
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142 | movl %edx, 4(%edi) |
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143 | |||
144 | movl 4(%esi), %edx |
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145 | subl 0(%esi), %edx # mods->mod_end - mods->mod_start |
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146 | movl %edx, 8(%edi) |
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147 | |||
148 | addl $16, %esi |
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149 | addl $8 , %edi |
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150 | |||
151 | loop mods_loop |
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152 | |||
153 | mods_end: |
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154 | |||
285 | decky | 155 | bt $6, %eax # mbi->flags[6] (mmap_length, mmap_addr valid) |
156 | jc mmap_valid |
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157 | |||
158 | xorl %edx, %edx |
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159 | jmp mmap_invalid |
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160 | |||
161 | mmap_valid: |
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162 | movl 44(%ebx), %ecx # mbi->mmap_length |
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163 | movl 48(%ebx), %esi # mbi->mmap_addr |
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164 | movl $e820table, %edi |
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165 | xorl %edx, %edx |
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280 | decky | 166 | |
285 | decky | 167 | mmap_loop: |
168 | cmpl $0, %ecx |
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169 | jle mmap_end |
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170 | |||
171 | movl 4(%esi), %eax # mmap->base_addr_low |
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172 | movl %eax, (%edi) |
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173 | |||
174 | movl 8(%esi), %eax # mmap->base_addr_high |
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175 | movl %eax, 4(%edi) |
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176 | |||
177 | movl 12(%esi), %eax # mmap->length_low |
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178 | movl %eax, 8(%edi) |
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179 | |||
180 | movl 16(%esi), %eax # mmap->length_high |
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181 | movl %eax, 12(%edi) |
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182 | |||
183 | movl 20(%esi), %eax # mmap->type |
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184 | movl %eax, 16(%edi) |
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185 | |||
186 | movl (%esi), %eax # mmap->size |
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187 | addl $0x4, %eax |
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188 | addl %eax, %esi |
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189 | subl %eax, %ecx |
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190 | addl $MEMMAP_E820_RECORD_SIZE, %edi |
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191 | incl %edx |
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192 | jmp mmap_loop |
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193 | |||
194 | mmap_end: |
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195 | |||
196 | mmap_invalid: |
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197 | movl %edx, e820counter |
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198 | |||
280 | decky | 199 | invalid_boot: |
200 | |||
693 | decky | 201 | #ifdef CONFIG_SMP |
202 | |||
203 | # copy AP bootstrap routines below 1 MB |
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204 | |||
205 | movl $BOOT_OFFSET, %esi |
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206 | movl $AP_BOOT_OFFSET, %edi |
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207 | movl $_hardcoded_unmapped_size, %ecx |
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208 | cld |
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209 | rep movsb |
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210 | |||
211 | #endif |
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212 | |||
213 | call main_bsp # never returns |
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110 | jermar | 214 | |
215 | cli |
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216 | hlt |
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217 | |||
218 | .global map_kernel |
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219 | map_kernel: |
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105 | jermar | 220 | # |
221 | # Here we setup mapping for both the unmapped and mapped sections of the kernel. |
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371 | jermar | 222 | # For simplicity, we map the entire 4G space. |
105 | jermar | 223 | # |
224 | movl %cr4, %ecx |
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225 | orl $(1<<4), %ecx |
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323 | jermar | 226 | movl %ecx, %cr4 # turn PSE on |
1 | jermar | 227 | |
371 | jermar | 228 | movl $(page_directory+0), %esi |
229 | movl $(page_directory+2048), %edi |
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230 | xorl %ecx, %ecx |
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231 | xorl %ebx, %ebx |
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232 | 0: |
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105 | jermar | 233 | movl $((1<<7)|(1<<0)), %eax |
371 | jermar | 234 | orl %ebx, %eax |
235 | movl %eax, (%esi,%ecx,4) # mapping 0x00000000+%ecx*4M => 0x00000000+%ecx*4M |
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236 | movl %eax, (%edi,%ecx,4) # mapping 0x80000000+%ecx*4M => 0x00000000+%ecx*4M |
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237 | addl $(4*1024*1024), %ebx |
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1 | jermar | 238 | |
371 | jermar | 239 | incl %ecx |
240 | cmpl $512, %ecx |
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241 | jl 0b |
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105 | jermar | 242 | |
371 | jermar | 243 | movl %esi, %cr3 |
105 | jermar | 244 | |
177 | jermar | 245 | # turn paging on |
105 | jermar | 246 | movl %cr0, %ebx |
247 | orl $(1<<31), %ebx |
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248 | movl %ebx, %cr0 |
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110 | jermar | 249 | ret |
105 | jermar | 250 | |
1287 | vana | 251 | #ifdef CONFIG_FB |
252 | vesa_init: |
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253 | jmp $selector(VESA_INIT_DES),$vesa_init_real-vesa_init; |
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254 | .code16 |
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255 | vesa_init_real: |
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105 | jermar | 256 | |
1287 | vana | 257 | mov %cr0,%eax; |
258 | and $~1,%eax; |
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259 | mov %eax,%cr0; |
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260 | |||
261 | |||
262 | jmp $VESA_INIT_SEGMENT,$vesa_init_real2-vesa_init; |
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263 | |||
264 | vesa_init_real2: |
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265 | |||
266 | |||
267 | mov %esp,%ebp; |
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268 | mov %ss,%cx; |
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269 | mov $VESA_INIT_SEGMENT,%bx; |
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270 | mov %bx,%ss; |
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271 | mov $0x0000fffc,%esp; |
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272 | push %ds; |
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273 | push %es; |
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274 | push %fs; |
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275 | push %gs; |
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276 | push %ebp; |
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277 | push %cx; |
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278 | |||
279 | mov %bx,%ds; |
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280 | mov %bx,%es; |
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281 | mov %bx,%fs; |
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282 | mov %bx,%gs; |
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283 | |||
284 | |||
285 | mov $vesa_idt-vesa_init,%ebx; |
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286 | lidtl (%ebx); |
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287 | |||
288 | #define VESA_INFO_SIZE 1024 |
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289 | |||
290 | #define VESA_MODE_LIST_PTR_OFFSET 14 |
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291 | #define VESA_MODE_WIDTH_OFFSET 18 |
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292 | #define VESA_MODE_HEIGHT_OFFSET 20 |
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293 | #define VESA_MODE_BPP_OFFSET 25 |
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294 | #define VESA_MODE_SCANLINE_OFFSET 16 |
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295 | #define VESA_MODE_PHADDR_OFFSET 40 |
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296 | |||
297 | #define VESA_END_OF_MODES 0xffff |
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298 | |||
299 | #define VESA_OK 0x4f |
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300 | |||
301 | #define VESA_GET_INFO 0x4f00 |
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302 | #define VESA_GET_MODE_INFO 0x4f01 |
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303 | #define VESA_SET_MODE 0x4f02 |
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304 | |||
305 | #define CONFIG_VESA_BPP_a 255 |
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306 | |||
307 | #if CONFIG_VESA_BPP==24 |
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308 | #undef CONFIG_VESA_BPP_a |
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309 | #define CONFIG_VESA_BPP_a 32 |
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310 | #endif |
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311 | |||
312 | |||
313 | mov $VESA_GET_INFO,%ax; |
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314 | mov $e_vesa_init-vesa_init,%di |
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315 | push %di; |
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316 | int $0x10; |
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317 | pop %di; |
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318 | cmp $VESA_OK,%al; |
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319 | jnz 0f; |
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320 | mov 2+VESA_MODE_LIST_PTR_OFFSET(%di),%si; |
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321 | mov %si,%gs; |
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322 | mov VESA_MODE_LIST_PTR_OFFSET(%di),%si; |
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323 | |||
324 | add $VESA_INFO_SIZE,%di; |
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325 | |||
326 | 1:# Try next mode |
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327 | mov %gs:(%si),%cx; |
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328 | cmp $VESA_END_OF_MODES,%cx; |
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329 | jz 0f; |
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330 | inc %si; |
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331 | inc %si; |
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332 | push %cx; |
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333 | push %di; |
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334 | push %si; |
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335 | mov $VESA_GET_MODE_INFO,%ax; |
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336 | int $0x10; |
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337 | pop %si; |
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338 | pop %di; |
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339 | pop %cx; |
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340 | cmp $VESA_OK,%al; |
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341 | jnz 0f; |
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342 | |||
343 | |||
344 | mov $CONFIG_VESA_WIDTH,%ax; |
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345 | cmp VESA_MODE_WIDTH_OFFSET(%di),%ax; |
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346 | jnz 1b; |
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347 | mov $CONFIG_VESA_HEIGHT,%ax; |
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348 | cmp VESA_MODE_HEIGHT_OFFSET(%di),%ax; |
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349 | jnz 1b; |
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350 | mov $CONFIG_VESA_BPP,%al; |
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351 | cmp VESA_MODE_BPP_OFFSET(%di),%al; |
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352 | jz 2f; |
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353 | mov $CONFIG_VESA_BPP_a,%al; |
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354 | cmp VESA_MODE_BPP_OFFSET(%di),%al; |
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355 | jnz 1b; |
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356 | |||
357 | 2: |
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358 | |||
359 | mov %cx,%bx; |
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360 | or $0xC000,%bx; |
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361 | push %di; |
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362 | mov $VESA_SET_MODE,%ax; |
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363 | int $0x10; |
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364 | pop %di; |
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365 | cmp $VESA_OK,%al; |
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366 | jnz 0f; |
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367 | |||
368 | mov VESA_MODE_PHADDR_OFFSET(%di),%esi; |
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369 | mov VESA_MODE_WIDTH_OFFSET(%di),%ax; |
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370 | shl $16,%eax; |
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371 | mov VESA_MODE_HEIGHT_OFFSET(%di),%ax; |
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372 | mov VESA_MODE_BPP_OFFSET(%di),%bl; |
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373 | xor %bh,%bh; |
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374 | shl $16,%ebx; |
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375 | mov VESA_MODE_SCANLINE_OFFSET(%di),%bx; |
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376 | mov %eax,%edi; |
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377 | |||
378 | |||
379 | |||
380 | 8: |
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381 | |||
382 | mov %cr0,%eax; |
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383 | or $1,%eax; |
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384 | mov %eax,%cr0; |
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385 | |||
386 | jmp 9f; |
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387 | 9: |
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388 | |||
389 | pop %cx; |
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390 | pop %ebp; |
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391 | pop %gs; |
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392 | pop %fs; |
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393 | pop %es; |
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394 | pop %ds; |
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395 | mov %cx,%ss; |
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396 | mov %ebp,%esp; |
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397 | |||
398 | ljmpl $KTEXT,$(vesa_init_protect-vesa_init+VESA_INIT_SEGMENT<<4); |
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399 | |||
400 | |||
401 | 0: #Error no Prefered mode found |
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402 | mov $0x111,%cx; |
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403 | push %di; |
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404 | push %cx; |
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405 | mov $VESA_GET_MODE_INFO,%ax; |
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406 | int $0x10; |
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407 | pop %cx; |
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408 | pop %di; |
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409 | cmp $VESA_OK,%al; |
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410 | jnz 1f; |
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1290 | vana | 411 | jz 2b; /* Force relative jump */ |
1287 | vana | 412 | |
413 | 1:mov $0x0003,%ax; |
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414 | int $0x10; |
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415 | mov $0xffffffff,%edi; /* EGA text mode used, because of problems with VESA */ |
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1290 | vana | 416 | xor %ax,%ax |
417 | jz 8b; /* Force relative jump */ |
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1287 | vana | 418 | |
1290 | vana | 419 | vesa_init_protect: |
420 | .code32 |
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421 | ret; |
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1287 | vana | 422 | |
423 | vesa_idt: |
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424 | .word 0x03ff |
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425 | .long 0 |
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426 | .align 4 |
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427 | e_vesa_init: |
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428 | #endif |
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429 | |||
406 | jermar | 430 | .section K_DATA_START, "aw", @progbits |
105 | jermar | 431 | |
432 | .align 4096 |
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433 | page_directory: |
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434 | .space 4096, 0 |