Changes in kernel/arch/amd64/src/boot/boot.S [304342e:873c681] in mainline
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kernel/arch/amd64/src/boot/boot.S (modified) (19 diffs)
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kernel/arch/amd64/src/boot/boot.S
r304342e r873c681 1 # 2 #Copyright (c) 2005 Ondrej Palkovsky3 #Copyright (c) 2006 Martin Decky4 #Copyright (c) 2008 Jakub Jermar5 #All rights reserved.6 # 7 #Redistribution and use in source and binary forms, with or without8 #modification, are permitted provided that the following conditions9 #are met:10 # 11 #- Redistributions of source code must retain the above copyright12 #notice, this list of conditions and the following disclaimer.13 #- Redistributions in binary form must reproduce the above copyright14 #notice, this list of conditions and the following disclaimer in the15 #documentation and/or other materials provided with the distribution.16 #- The name of the author may not be used to endorse or promote products17 #derived from this software without specific prior written permission.18 # 19 #THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR20 #IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES21 #OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.22 #IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,23 #INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT24 #NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,25 #DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY26 #THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT27 #(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF28 #THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.29 # 1 /* 2 * Copyright (c) 2005 Ondrej Palkovsky 3 * Copyright (c) 2006 Martin Decky 4 * Copyright (c) 2008 Jakub Jermar 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * - Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * - Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * - The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 30 31 31 #include <arch/boot/boot.h> 32 32 #include <arch/boot/memmap.h> 33 #include <arch/mm/page.h> 33 #include <arch/mm/page.h> 34 34 #include <arch/mm/ptl.h> 35 35 #include <arch/pm.h> … … 37 37 #include <arch/cpuid.h> 38 38 39 #define START_STACK 39 #define START_STACK (BOOT_OFFSET - BOOT_STACK_SIZE) 40 40 41 41 .section K_TEXT_START, "ax" 42 42 43 43 .code32 44 45 .macro pm_error msg 46 movl \msg, %esi 47 jmp pm_error_halt 48 .endm 49 50 .macro pm_status msg 51 #ifdef CONFIG_EGA 52 pushl %esi 53 movl \msg, %esi 54 call pm_early_puts 55 popl %esi 56 #endif 57 .endm 58 59 .macro pm2_status msg 60 #ifndef CONFIG_FB 61 pm_status \msg 62 #endif 63 .endm 64 44 65 .align 4 45 66 .global multiboot_image_start … … 47 68 .long MULTIBOOT_HEADER_MAGIC 48 69 .long MULTIBOOT_HEADER_FLAGS 49 .long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS) # checksum70 .long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS) /* checksum */ 50 71 .long multiboot_header 51 72 .long unmapped_ktext_start … … 56 77 multiboot_image_start: 57 78 cld 58 movl $START_STACK, %esp # initialize stack pointer 59 lgdtl bootstrap_gdtr # initialize Global Descriptor Table register 60 79 80 /* Initialize stack pointer */ 81 movl $START_STACK, %esp 82 83 /* Initialize Global Descriptor Table register */ 84 lgdtl bootstrap_gdtr 85 86 /* Kernel data + stack */ 61 87 movw $gdtselector(KDATA_DES), %cx 62 88 movw %cx, %es 63 movw %cx, %ds # kernel data + stack89 movw %cx, %ds 64 90 movw %cx, %ss 65 91 66 # 67 # Simics seems to remove hidden part of GS on entering user mode 68 # when _visible_ part of GS does not point to user-mode segment. 69 # 70 92 /* 93 * Simics seems to remove hidden part of GS on entering user mode 94 * when _visible_ part of GS does not point to user-mode segment. 95 */ 71 96 movw $gdtselector(UDATA_DES), %cx 72 97 movw %cx, %fs … … 76 101 multiboot_meeting_point: 77 102 78 movl %eax, grub_eax # save parameters from GRUB 103 /* Save GRUB arguments */ 104 movl %eax, grub_eax 79 105 movl %ebx, grub_ebx 80 106 81 # 82 # Protected 32-bit. We want to reuse the code-seg descriptor, 83 # the Default operand size must not be 1 when entering long mode. 84 # 107 pm_status $status_prot 85 108 86 109 movl $(INTEL_CPUID_EXTENDED), %eax … … 89 112 ja extended_cpuid_supported 90 113 91 movl $extended_cpuid_msg, %esi 92 jmp error_halt 114 pm_error $err_extended_cpuid 93 115 94 116 extended_cpuid_supported: … … 99 121 jc long_mode_supported 100 122 101 movl $long_mode_msg, %esi 102 jmp error_halt 123 pm_error $err_long_mode 103 124 104 125 long_mode_supported: … … 107 128 jc noexecute_supported 108 129 109 movl $noexecute_msg, %esi 110 jmp error_halt 130 pm_error $err_noexecute 111 131 112 132 noexecute_supported: … … 117 137 jc fx_supported 118 138 119 movl $fx_msg, %esi 120 jmp error_halt 139 pm_error $err_fx 121 140 122 141 fx_supported: … … 125 144 jc sse2_supported 126 145 127 movl $sse2_msg, %esi 128 jmp error_halt 146 pm_error $err_sse2 129 147 130 148 sse2_supported: 131 149 132 150 #include "vesa_prot.inc" 133 134 # 135 # Enable 64-bit page translation entries - CR4.PAE = 1. 136 # Paging is not enabled until after long mode is enabled. 137 # 151 152 /* 153 * Protected 32-bit. We want to reuse the code-seg descriptor, 154 * the Default operand size must not be 1 when entering long mode. 155 */ 156 157 pm2_status $status_prot2 158 159 /* 160 * Enable 64-bit page translation entries - CR4.PAE = 1. 161 * Paging is not enabled until after long mode is enabled. 162 */ 138 163 139 164 movl %cr4, %eax … … 141 166 movl %eax, %cr4 142 167 143 # set up paging tables 144 168 /* Set up paging tables */ 145 169 leal ptl_0, %eax 146 170 movl %eax, %cr3 147 171 148 # enable long mode 149 150 movl $EFER_MSR_NUM, %ecx # EFER MSR number 151 rdmsr # read EFER 152 btsl $AMD_LME_FLAG, %eax # set LME = 1 153 wrmsr # write EFER 154 155 # enable paging to activate long mode (set CR0.PG = 1) 156 172 /* Enable long mode */ 173 movl $EFER_MSR_NUM, %ecx 174 rdmsr /* read EFER */ 175 btsl $AMD_LME_FLAG, %eax /* set LME = 1 */ 176 wrmsr 177 178 /* Enable paging to activate long mode (set CR0.PG = 1) */ 157 179 movl %cr0, %eax 158 180 btsl $31, %eax 159 181 movl %eax, %cr0 160 182 161 # at this point we are in compatibility mode 162 183 /* At this point we are in compatibility mode */ 163 184 jmpl $gdtselector(KTEXT_DES), $start64 164 185 186 /** Print string to EGA display (in light red) and halt. 187 * 188 * Should be executed from 32 bit protected mode with paging 189 * turned off. Stack is not required. This routine is used even 190 * if CONFIG_EGA is not enabled. Since we are going to halt the 191 * CPU anyway, it is always better to at least try to print 192 * some hints. 193 * 194 * @param %esi NULL-terminated string to print. 195 * 196 */ 197 pm_error_halt: 198 movl $0xb8000, %edi /* base of EGA text mode memory */ 199 xorl %eax, %eax 200 201 /* Read bits 8 - 15 of the cursor address */ 202 movw $0x3d4, %dx 203 movb $0xe, %al 204 outb %al, %dx 205 206 movw $0x3d5, %dx 207 inb %dx, %al 208 shl $8, %ax 209 210 /* Read bits 0 - 7 of the cursor address */ 211 movw $0x3d4, %dx 212 movb $0xf, %al 213 outb %al, %dx 214 215 movw $0x3d5, %dx 216 inb %dx, %al 217 218 /* Sanity check for the cursor on screen */ 219 cmp $2000, %ax 220 jb err_cursor_ok 221 222 movw $1998, %ax 223 224 err_cursor_ok: 225 226 movw %ax, %bx 227 shl $1, %eax 228 addl %eax, %edi 229 230 err_ploop: 231 lodsb 232 233 cmp $0, %al 234 je err_ploop_end 235 236 movb $0x0c, %ah /* black background, light red foreground */ 237 stosw 238 239 /* Sanity check for the cursor on the last line */ 240 inc %bx 241 cmp $2000, %bx 242 jb err_ploop 243 244 /* Scroll the screen (24 rows) */ 245 movl %esi, %edx 246 movl $0xb80a0, %esi 247 movl $0xb8000, %edi 248 movl $1920, %ecx 249 rep movsw 250 251 /* Clear the 24th row */ 252 xorl %eax, %eax 253 movl $80, %ecx 254 rep stosw 255 256 /* Go to row 24 */ 257 movl %edx, %esi 258 movl $0xb8f00, %edi 259 movw $1920, %bx 260 261 jmp err_ploop 262 err_ploop_end: 263 264 /* Write bits 8 - 15 of the cursor address */ 265 movw $0x3d4, %dx 266 movb $0xe, %al 267 outb %al, %dx 268 269 movw $0x3d5, %dx 270 movb %bh, %al 271 outb %al, %dx 272 273 /* Write bits 0 - 7 of the cursor address */ 274 movw $0x3d4, %dx 275 movb $0xf, %al 276 outb %al, %dx 277 278 movw $0x3d5, %dx 279 movb %bl, %al 280 outb %al, %dx 281 282 cli 283 hlt1: 284 hlt 285 jmp hlt1 286 287 /** Print string to EGA display (in light green). 288 * 289 * Should be called from 32 bit protected mode with paging 290 * turned off. A stack space of at least 24 bytes is required, 291 * but the function does not establish a stack frame. 292 * 293 * Macros such as pm_status and pm2_status take care that 294 * this function is used only when CONFIG_EGA is enabled 295 * and CONFIG_FB is disabled. 296 * 297 * @param %esi NULL-terminated string to print. 298 * 299 */ 300 pm_early_puts: 301 pushl %eax 302 pushl %ebx 303 pushl %ecx 304 pushl %edx 305 pushl %edi 306 307 movl $0xb8000, %edi /* base of EGA text mode memory */ 308 xorl %eax, %eax 309 310 /* Read bits 8 - 15 of the cursor address */ 311 movw $0x3d4, %dx 312 movb $0xe, %al 313 outb %al, %dx 314 315 movw $0x3d5, %dx 316 inb %dx, %al 317 shl $8, %ax 318 319 /* Read bits 0 - 7 of the cursor address */ 320 movw $0x3d4, %dx 321 movb $0xf, %al 322 outb %al, %dx 323 324 movw $0x3d5, %dx 325 inb %dx, %al 326 327 /* Sanity check for the cursor on screen */ 328 cmp $2000, %ax 329 jb pm_puts_cursor_ok 330 331 movw $1998, %ax 332 333 pm_puts_cursor_ok: 334 335 movw %ax, %bx 336 shl $1, %eax 337 addl %eax, %edi 338 339 pm_puts_ploop: 340 lodsb 341 342 cmp $0, %al 343 je pm_puts_ploop_end 344 345 movb $0x0a, %ah /* black background, light green foreground */ 346 stosw 347 348 /* Sanity check for the cursor on the last line */ 349 inc %bx 350 cmp $2000, %bx 351 jb pm_puts_ploop 352 353 /* Scroll the screen (24 rows) */ 354 movl %esi, %edx 355 movl $0xb80a0, %esi 356 movl $0xb8000, %edi 357 movl $1920, %ecx 358 rep movsw 359 360 /* Clear the 24th row */ 361 xorl %eax, %eax 362 movl $80, %ecx 363 rep stosw 364 365 /* Go to row 24 */ 366 movl %edx, %esi 367 movl $0xb8f00, %edi 368 movw $1920, %bx 369 370 jmp pm_puts_ploop 371 pm_puts_ploop_end: 372 373 /* Write bits 8 - 15 of the cursor address */ 374 movw $0x3d4, %dx 375 movb $0xe, %al 376 outb %al, %dx 377 378 movw $0x3d5, %dx 379 movb %bh, %al 380 outb %al, %dx 381 382 /* Write bits 0 - 7 of the cursor address */ 383 movw $0x3d4, %dx 384 movb $0xf, %al 385 outb %al, %dx 386 387 movw $0x3d5, %dx 388 movb %bl, %al 389 outb %al, %dx 390 391 popl %edi 392 popl %edx 393 popl %ecx 394 popl %ebx 395 popl %eax 396 397 ret 398 165 399 .code64 400 401 .macro long_status msg 402 pushq %rdi 403 movq \msg, %rdi 404 call early_puts 405 popq %rdi 406 .endm 407 166 408 start64: 409 410 /* 411 * Long mode. 412 */ 413 167 414 movq $(PA2KA(START_STACK)), %rsp 168 415 169 # call arch_pre_main(grub_eax, grub_ebx) 416 /* Create the first stack frame */ 417 pushq $0 418 movq %rsp, %rbp 419 420 long_status $status_long 421 422 /* Call arch_pre_main(grub_eax, grub_ebx) */ 170 423 xorq %rdi, %rdi 171 424 movl grub_eax, %edi 172 425 xorq %rsi, %rsi 173 426 movl grub_ebx, %esi 174 call arch_pre_main 175 176 # create the first stack frame 177 pushq $0 178 movq %rsp, %rbp 179 180 call main_bsp 181 182 # not reached 183 427 428 movabsq $arch_pre_main, %rax 429 callq *%rax 430 431 long_status $status_main 432 433 /* Call main_bsp() */ 434 movabsq $main_bsp, %rax 435 call *%rax 436 437 /* Not reached */ 184 438 cli 185 439 hlt0: … … 187 441 jmp hlt0 188 442 189 # Print string from %esi to EGA display (in red) and halt 190 error_halt: 191 movl $0xb8000, %edi # base of EGA text mode memory 192 xorl %eax, %eax 193 194 movw $0x3d4, %dx # read bits 8 - 15 of the cursor address 443 /** Print string to EGA display. 444 * 445 * Should be called from long mode (with paging enabled 446 * and stack established). This function is ABI compliant 447 * (without red-zone). 448 * 449 * If CONFIG_EGA is undefined or CONFIG_FB is defined 450 * then this function does nothing. 451 * 452 * @param %rdi NULL-terminated string to print. 453 * 454 */ 455 early_puts: 456 457 #if ((defined(CONFIG_EGA)) && (!defined(CONFIG_FB))) 458 459 /* Prologue, save preserved registers */ 460 pushq %rbp 461 movq %rsp, %rbp 462 pushq %rbx 463 464 movq %rdi, %rsi 465 movq $(PA2KA(0xb8000)), %rdi /* base of EGA text mode memory */ 466 xorq %rax, %rax 467 468 /* Read bits 8 - 15 of the cursor address */ 469 movw $0x3d4, %dx 195 470 movb $0xe, %al 196 471 outb %al, %dx … … 200 475 shl $8, %ax 201 476 202 movw $0x3d4, %dx # read bits 0 - 7 of the cursor address 477 /* Read bits 0 - 7 of the cursor address */ 478 movw $0x3d4, %dx 203 479 movb $0xf, %al 204 480 outb %al, %dx … … 207 483 inb %dx, %al 208 484 209 cmp $1920, %ax 210 jbe cursor_ok 211 212 movw $1920, %ax # sanity check for the cursor on the last line 213 214 cursor_ok: 485 /* Sanity check for the cursor on screen */ 486 cmp $2000, %ax 487 jb early_puts_cursor_ok 488 489 movw $1998, %ax 490 491 early_puts_cursor_ok: 215 492 216 493 movw %ax, %bx 217 shl $1, %eax 218 addl %eax, %edi 219 220 movw $0x0c00, %ax # black background, light red foreground 221 222 ploop: 494 shl $1, %rax 495 addq %rax, %rdi 496 497 early_puts_ploop: 223 498 lodsb 499 224 500 cmp $0, %al 225 je ploop_end 501 je early_puts_ploop_end 502 503 movb $0x0e, %ah /* black background, yellow foreground */ 226 504 stosw 505 506 /* Sanity check for the cursor on the last line */ 227 507 inc %bx 228 jmp ploop 229 ploop_end: 230 231 movw $0x3d4, %dx # write bits 8 - 15 of the cursor address 508 cmp $2000, %bx 509 jb early_puts_ploop 510 511 /* Scroll the screen (24 rows) */ 512 movq %rsi, %rdx 513 movq $(PA2KA(0xb80a0)), %rsi 514 movq $(PA2KA(0xb8000)), %rdi 515 movq $1920, %rcx 516 rep movsw 517 518 /* Clear the 24th row */ 519 xorq %rax, %rax 520 movq $80, %rcx 521 rep stosw 522 523 /* Go to row 24 */ 524 movq %rdx, %rsi 525 movq $(PA2KA(0xb8f00)), %rdi 526 movw $1920, %bx 527 528 jmp early_puts_ploop 529 early_puts_ploop_end: 530 531 /* Write bits 8 - 15 of the cursor address */ 532 movw $0x3d4, %dx 232 533 movb $0xe, %al 233 534 outb %al, %dx … … 237 538 outb %al, %dx 238 539 239 movw $0x3d4, %dx # write bits 0 - 7 of the cursor address 540 /* Write bits 0 - 7 of the cursor address */ 541 movw $0x3d4, %dx 240 542 movb $0xf, %al 241 543 outb %al, %dx … … 245 547 outb %al, %dx 246 548 247 cli 248 hlt1: 249 hlt 250 jmp hlt1 549 /* Epilogue, restore preserved registers */ 550 popq %rbx 551 leave 552 553 #endif 554 555 ret 251 556 252 557 #include "vesa_real.inc" … … 254 559 .section K_INI_PTLS, "aw", @progbits 255 560 256 # 257 # Macro for generating initial page table contents. 258 # @param cnt Number of entries to generat. Must be multiple of 8. 259 # @param g Number of GB that will be added to the mapping. 260 # 261 .macro ptl2gen cnt g 262 .if \cnt 263 ptl2gen "\cnt - 8" \g 264 .quad ((\cnt - 8) * 0x200000) + (\g * 1024 * 1024 * 1024) | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) 265 .quad ((\cnt - 7) * 0x200000) + (\g * 1024 * 1024 * 1024) | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) 266 .quad ((\cnt - 6) * 0x200000) + (\g * 1024 * 1024 * 1024) | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) 267 .quad ((\cnt - 5) * 0x200000) + (\g * 1024 * 1024 * 1024) | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) 268 .quad ((\cnt - 4) * 0x200000) + (\g * 1024 * 1024 * 1024) | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) 269 .quad ((\cnt - 3) * 0x200000) + (\g * 1024 * 1024 * 1024) | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) 270 .quad ((\cnt - 2) * 0x200000) + (\g * 1024 * 1024 * 1024) | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) 271 .quad ((\cnt - 1) * 0x200000) + (\g * 1024 * 1024 * 1024) | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) 272 .endif 561 /** Generate initial page table contents. 562 * 563 * @param cnt Number of entries to generate. Must be multiple of 8. 564 * @param g Number of GB that will be added to the mapping. 565 * 566 */ 567 .macro ptl2gen cnt g 568 .if \cnt 569 ptl2gen "\cnt - 8" \g 570 .quad ((\cnt - 8) * 0x200000) + (\g * 1024 * 1024 * 1024) | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) 571 .quad ((\cnt - 7) * 0x200000) + (\g * 1024 * 1024 * 1024) | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) 572 .quad ((\cnt - 6) * 0x200000) + (\g * 1024 * 1024 * 1024) | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) 573 .quad ((\cnt - 5) * 0x200000) + (\g * 1024 * 1024 * 1024) | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) 574 .quad ((\cnt - 4) * 0x200000) + (\g * 1024 * 1024 * 1024) | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) 575 .quad ((\cnt - 3) * 0x200000) + (\g * 1024 * 1024 * 1024) | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) 576 .quad ((\cnt - 2) * 0x200000) + (\g * 1024 * 1024 * 1024) | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) 577 .quad ((\cnt - 1) * 0x200000) + (\g * 1024 * 1024 * 1024) | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE) 578 .endif 273 579 .endm 274 580 275 # Page table for pages in the first gigabyte. 276 .align 4096 277 .global ptl_2_0g 278 ptl_2_0g: 581 /* Page table for pages in the 1st gigabyte. */ 582 .align 4096 583 ptl_2_0g: 279 584 ptl2gen 512 0 280 585 281 # Page table for pages in the second gigabyte. 282 .align 4096 283 .global ptl_2_1g 586 /* Page table for pages in the 2nd gigabyte. */ 587 .align 4096 284 588 ptl_2_1g: 285 589 ptl2gen 512 1 286 590 287 # Page table for pages in the third gigabyte. 288 .align 4096 289 .global ptl_2_2g 591 /* Page table for pages in the 3rd gigabyte. */ 592 .align 4096 290 593 ptl_2_2g: 291 594 ptl2gen 512 2 292 595 293 # Page table for pages in the fourth gigabyte. 294 .align 4096 295 .global ptl_2_3g 596 /* Page table for pages in the 4th gigabyte. */ 597 .align 4096 296 598 ptl_2_3g: 297 599 ptl2gen 512 3 298 600 299 .align 4096 300 .global ptl_1 601 /* Page table for pages in the 5th gigabyte. */ 602 .align 4096 603 ptl_2_4g: 604 ptl2gen 512 3 605 606 /* Page table for pages in the 6th gigabyte. */ 607 .align 4096 608 ptl_2_5g: 609 ptl2gen 512 3 610 611 /* Page table for pages in the 7th gigabyte. */ 612 .align 4096 613 ptl_2_6g: 614 ptl2gen 512 3 615 616 /* Page table for pages in the 8th gigabyte. */ 617 .align 4096 618 ptl_2_7g: 619 ptl2gen 512 3 620 621 .align 4096 301 622 ptl_1: 302 # Identity mapping for [0; 4G)623 /* Identity mapping for [0; 8G) */ 303 624 .quad ptl_2_0g + (PTL_WRITABLE | PTL_PRESENT) 304 .quad ptl_2_1g + (PTL_WRITABLE | PTL_PRESENT) 625 .quad ptl_2_1g + (PTL_WRITABLE | PTL_PRESENT) 305 626 .quad ptl_2_2g + (PTL_WRITABLE | PTL_PRESENT) 306 627 .quad ptl_2_3g + (PTL_WRITABLE | PTL_PRESENT) 307 .fill 506, 8, 0 308 # Mapping of [0; 1G) at -2G 309 .quad ptl_2_0g + (PTL_WRITABLE | PTL_PRESENT) 310 .fill 1, 8, 0 628 .quad ptl_2_4g + (PTL_WRITABLE | PTL_PRESENT) 629 .quad ptl_2_5g + (PTL_WRITABLE | PTL_PRESENT) 630 .quad ptl_2_6g + (PTL_WRITABLE | PTL_PRESENT) 631 .quad ptl_2_7g + (PTL_WRITABLE | PTL_PRESENT) 632 .fill 504, 8, 0 311 633 312 634 .align 4096 … … 314 636 ptl_0: 315 637 .quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT) 316 .fill 255, 8,0638 .fill 255, 8, 0 317 639 .quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT) 318 .fill 254,8,0 319 .quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT) 640 .fill 255, 8, 0 320 641 321 642 .section K_DATA_START, "aw", @progbits … … 332 653 .long 0 333 654 334 extended_cpuid_msg: 335 .asciz "Extended CPUID not supported. System halted." 336 long_mode_msg: 337 .asciz "64 bit long mode not supported. System halted." 338 noexecute_msg: 339 .asciz "No-execute pages not supported. System halted." 340 fx_msg: 341 .asciz "FXSAVE/FXRESTORE instructions not supported. System halted." 342 sse2_msg: 343 .asciz "SSE2 instructions not supported. System halted." 655 err_extended_cpuid: 656 .asciz "Error: Extended CPUID not supported -- CPU is not 64-bit. System halted." 657 err_long_mode: 658 .asciz "Error: 64-bit long mode not supported. System halted." 659 err_noexecute: 660 .asciz "Error: No-execute pages not supported. System halted." 661 err_fx: 662 .asciz "Error: FXSAVE/FXRESTORE instructions not supported. System halted." 663 err_sse2: 664 .asciz "Error: SSE2 instructions not supported. System halted." 665 666 status_prot: 667 .asciz "[prot] " 668 status_vesa_copy: 669 .asciz "[vesa_copy] " 670 status_grub_cmdline: 671 .asciz "[grub_cmdline] " 672 status_vesa_real: 673 .asciz "[vesa_real] " 674 status_prot2: 675 .asciz "[prot2] " 676 status_long: 677 .asciz "[long] " 678 status_main: 679 .asciz "[main] "
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