Changes in kernel/arch/amd64/src/boot/boot.S [873c681:304342e] in mainline
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kernel/arch/amd64/src/boot/boot.S (modified) (18 diffs)
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kernel/arch/amd64/src/boot/boot.S
r873c681 r304342e 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 msg46 movl \msg, %esi47 jmp pm_error_halt48 .endm49 50 .macro pm_status msg51 #ifdef CONFIG_EGA52 pushl %esi53 movl \msg, %esi54 call pm_early_puts55 popl %esi56 #endif57 .endm58 59 .macro pm2_status msg60 #ifndef CONFIG_FB61 pm_status \msg62 #endif63 .endm64 65 44 .align 4 66 45 .global multiboot_image_start … … 68 47 .long MULTIBOOT_HEADER_MAGIC 69 48 .long MULTIBOOT_HEADER_FLAGS 70 .long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS) /* checksum */49 .long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS) # checksum 71 50 .long multiboot_header 72 51 .long unmapped_ktext_start … … 77 56 multiboot_image_start: 78 57 cld 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 */ 58 movl $START_STACK, %esp # initialize stack pointer 59 lgdtl bootstrap_gdtr # initialize Global Descriptor Table register 60 87 61 movw $gdtselector(KDATA_DES), %cx 88 62 movw %cx, %es 89 movw %cx, %ds 63 movw %cx, %ds # kernel data + stack 90 64 movw %cx, %ss 91 65 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 */ 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 96 71 movw $gdtselector(UDATA_DES), %cx 97 72 movw %cx, %fs … … 101 76 multiboot_meeting_point: 102 77 103 /* Save GRUB arguments */ 104 movl %eax, grub_eax 78 movl %eax, grub_eax # save parameters from GRUB 105 79 movl %ebx, grub_ebx 106 80 107 pm_status $status_prot 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 # 108 85 109 86 movl $(INTEL_CPUID_EXTENDED), %eax … … 112 89 ja extended_cpuid_supported 113 90 114 pm_error $err_extended_cpuid 91 movl $extended_cpuid_msg, %esi 92 jmp error_halt 115 93 116 94 extended_cpuid_supported: … … 121 99 jc long_mode_supported 122 100 123 pm_error $err_long_mode 101 movl $long_mode_msg, %esi 102 jmp error_halt 124 103 125 104 long_mode_supported: … … 128 107 jc noexecute_supported 129 108 130 pm_error $err_noexecute 109 movl $noexecute_msg, %esi 110 jmp error_halt 131 111 132 112 noexecute_supported: … … 137 117 jc fx_supported 138 118 139 pm_error $err_fx 119 movl $fx_msg, %esi 120 jmp error_halt 140 121 141 122 fx_supported: … … 144 125 jc sse2_supported 145 126 146 pm_error $err_sse2 127 movl $sse2_msg, %esi 128 jmp error_halt 147 129 148 130 sse2_supported: 149 131 150 132 #include "vesa_prot.inc" 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 */ 133 134 # 135 # Enable 64-bit page translation entries - CR4.PAE = 1. 136 # Paging is not enabled until after long mode is enabled. 137 # 163 138 164 139 movl %cr4, %eax … … 166 141 movl %eax, %cr4 167 142 168 /* Set up paging tables */ 143 # set up paging tables 144 169 145 leal ptl_0, %eax 170 146 movl %eax, %cr3 171 147 172 /* 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) */ 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) 156 179 157 movl %cr0, %eax 180 158 btsl $31, %eax 181 159 movl %eax, %cr0 182 160 183 /* At this point we are in compatibility mode */ 161 # at this point we are in compatibility mode 162 184 163 jmpl $gdtselector(KTEXT_DES), $start64 185 164 186 /** 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 */ 165 .code64 166 start64: 167 movq $(PA2KA(START_STACK)), %rsp 168 169 # call arch_pre_main(grub_eax, grub_ebx) 170 xorq %rdi, %rdi 171 movl grub_eax, %edi 172 xorq %rsi, %rsi 173 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 183 184 cli 185 hlt0: 186 hlt 187 jmp hlt0 188 189 # Print string from %esi to EGA display (in red) and halt 190 error_halt: 191 movl $0xb8000, %edi # base of EGA text mode memory 199 192 xorl %eax, %eax 200 193 201 /* Read bits 8 - 15 of the cursor address */ 202 movw $0x3d4, %dx 194 movw $0x3d4, %dx # read bits 8 - 15 of the cursor address 203 195 movb $0xe, %al 204 196 outb %al, %dx … … 208 200 shl $8, %ax 209 201 210 /* Read bits 0 - 7 of the cursor address */ 211 movw $0x3d4, %dx 202 movw $0x3d4, %dx # read bits 0 - 7 of the cursor address 212 203 movb $0xf, %al 213 204 outb %al, %dx … … 216 207 inb %dx, %al 217 208 218 /* 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: 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: 225 215 226 216 movw %ax, %bx … … 228 218 addl %eax, %edi 229 219 230 err_ploop: 220 movw $0x0c00, %ax # black background, light red foreground 221 222 ploop: 231 223 lodsb 232 233 224 cmp $0, %al 234 je err_ploop_end 235 236 movb $0x0c, %ah /* black background, light red foreground */ 225 je ploop_end 237 226 stosw 238 239 /* Sanity check for the cursor on the last line */240 227 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 228 jmp ploop 229 ploop_end: 230 231 movw $0x3d4, %dx # write bits 8 - 15 of the cursor address 266 232 movb $0xe, %al 267 233 outb %al, %dx … … 271 237 outb %al, %dx 272 238 273 /* Write bits 0 - 7 of the cursor address */ 274 movw $0x3d4, %dx 239 movw $0x3d4, %dx # write bits 0 - 7 of the cursor address 275 240 movb $0xf, %al 276 241 outb %al, %dx … … 285 250 jmp hlt1 286 251 287 /** 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 398 399 .code64 400 401 .macro long_status msg 402 pushq %rdi 403 movq \msg, %rdi 404 call early_puts 405 popq %rdi 252 #include "vesa_real.inc" 253 254 .section K_INI_PTLS, "aw", @progbits 255 256 # 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 406 273 .endm 407 274 408 start64: 409 410 /* 411 * Long mode. 412 */ 413 414 movq $(PA2KA(START_STACK)), %rsp 415 416 /* 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) */ 423 xorq %rdi, %rdi 424 movl grub_eax, %edi 425 xorq %rsi, %rsi 426 movl grub_ebx, %esi 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 */ 438 cli 439 hlt0: 440 hlt 441 jmp hlt0 442 443 /** 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 470 movb $0xe, %al 471 outb %al, %dx 472 473 movw $0x3d5, %dx 474 inb %dx, %al 475 shl $8, %ax 476 477 /* Read bits 0 - 7 of the cursor address */ 478 movw $0x3d4, %dx 479 movb $0xf, %al 480 outb %al, %dx 481 482 movw $0x3d5, %dx 483 inb %dx, %al 484 485 /* 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: 492 493 movw %ax, %bx 494 shl $1, %rax 495 addq %rax, %rdi 496 497 early_puts_ploop: 498 lodsb 499 500 cmp $0, %al 501 je early_puts_ploop_end 502 503 movb $0x0e, %ah /* black background, yellow foreground */ 504 stosw 505 506 /* Sanity check for the cursor on the last line */ 507 inc %bx 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 533 movb $0xe, %al 534 outb %al, %dx 535 536 movw $0x3d5, %dx 537 movb %bh, %al 538 outb %al, %dx 539 540 /* Write bits 0 - 7 of the cursor address */ 541 movw $0x3d4, %dx 542 movb $0xf, %al 543 outb %al, %dx 544 545 movw $0x3d5, %dx 546 movb %bl, %al 547 outb %al, %dx 548 549 /* Epilogue, restore preserved registers */ 550 popq %rbx 551 leave 552 553 #endif 554 555 ret 556 557 #include "vesa_real.inc" 558 559 .section K_INI_PTLS, "aw", @progbits 560 561 /** 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 579 .endm 580 581 /* Page table for pages in the 1st gigabyte. */ 582 .align 4096 583 ptl_2_0g: 275 # Page table for pages in the first gigabyte. 276 .align 4096 277 .global ptl_2_0g 278 ptl_2_0g: 584 279 ptl2gen 512 0 585 280 586 /* Page table for pages in the 2nd gigabyte. */ 587 .align 4096 281 # Page table for pages in the second gigabyte. 282 .align 4096 283 .global ptl_2_1g 588 284 ptl_2_1g: 589 285 ptl2gen 512 1 590 286 591 /* Page table for pages in the 3rd gigabyte. */ 592 .align 4096 287 # Page table for pages in the third gigabyte. 288 .align 4096 289 .global ptl_2_2g 593 290 ptl_2_2g: 594 291 ptl2gen 512 2 595 292 596 /* Page table for pages in the 4th gigabyte. */ 597 .align 4096 293 # Page table for pages in the fourth gigabyte. 294 .align 4096 295 .global ptl_2_3g 598 296 ptl_2_3g: 599 297 ptl2gen 512 3 600 298 601 /* 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 299 .align 4096 300 .global ptl_1 622 301 ptl_1: 623 /* Identity mapping for [0; 8G) */302 # Identity mapping for [0; 4G) 624 303 .quad ptl_2_0g + (PTL_WRITABLE | PTL_PRESENT) 625 .quad ptl_2_1g + (PTL_WRITABLE | PTL_PRESENT) 304 .quad ptl_2_1g + (PTL_WRITABLE | PTL_PRESENT) 626 305 .quad ptl_2_2g + (PTL_WRITABLE | PTL_PRESENT) 627 306 .quad ptl_2_3g + (PTL_WRITABLE | PTL_PRESENT) 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, 0 307 .fill 506, 8, 0 308 # Mapping of [0; 1G) at -2G 309 .quad ptl_2_0g + (PTL_WRITABLE | PTL_PRESENT) 310 .fill 1, 8, 0 633 311 634 312 .align 4096 … … 636 314 ptl_0: 637 315 .quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT) 638 .fill 255, 8,0316 .fill 255,8,0 639 317 .quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT) 640 .fill 255, 8, 0 318 .fill 254,8,0 319 .quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT) 641 320 642 321 .section K_DATA_START, "aw", @progbits … … 653 332 .long 0 654 333 655 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] " 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."
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