| 1,5 → 1,6 |
|---|
| # |
| # Copyright (C) 2001-2004 Jakub Jermar |
| # Copyright (C) 2005-2006 Martin Decky |
| # All rights reserved. |
| # |
| # Redistribution and use in source and binary forms, with or without |
| 31,6 → 32,8 |
|---|
| #include <arch/mm/page.h> |
| #include <arch/pm.h> |
| |
| #define START_STACK (BOOT_OFFSET - BOOT_STACK_SIZE) |
| |
| .section K_TEXT_START, "ax" |
| |
| KTEXT=8 |
| 38,40 → 41,34 |
|---|
| |
| .code32 |
| .align 4 |
| .global multiboot_image_start |
| multiboot_header: |
| .long MULTIBOOT_HEADER_MAGIC |
| .long MULTIBOOT_HEADER_FLAGS |
| .long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS) # checksum |
| .long multiboot_header + BOOT_OFFSET |
| .long unmapped_ktext_start + BOOT_OFFSET |
| .long multiboot_header |
| .long unmapped_ktext_start |
| .long 0 |
| .long 0 |
| .long multiboot_image_start + BOOT_OFFSET |
| .long multiboot_image_start |
| |
| multiboot_image_start: |
| movl $BOOTSTRAP_OFFSET - 0x400, %esp # initialize stack pointer |
| |
| lgdt protected_bootstrap_gdtr - 0x80000000 # initialize Global Descriptor Table register |
| movl $START_STACK, %esp # initialize stack pointer |
| lgdt KA2PA(bootstrap_gdtr) # initialize Global Descriptor Table register |
| |
| movw $KDATA, %cx |
| movw %cx, %es |
| movw %cx, %gs |
| movw %cx, %fs |
| movw %cx, %ds # kernel data + stack |
| movw %cx, %ds # kernel data + stack |
| movw %cx, %ss |
| |
| jmpl $KTEXT, $multiboot_meeting_point + BOOT_OFFSET |
| jmpl $KTEXT, $multiboot_meeting_point |
| multiboot_meeting_point: |
| |
| pushl %ebx # save parameters from GRUB |
| pushl %eax |
| |
| movl $BOOTSTRAP_OFFSET + BOOT_OFFSET, %esi |
| movl $BOOTSTRAP_OFFSET, %edi |
| movl $_hardcoded_unmapped_size, %ecx |
| cld |
| rep movsb |
| |
| call map_kernel # map kernel and turn paging on |
| |
| popl %eax |
| 170,7 → 167,19 |
|---|
| |
| invalid_boot: |
| |
| call main_bsp - BOOT_OFFSET # never returns |
| #ifdef CONFIG_SMP |
| |
| # copy AP bootstrap routines below 1 MB |
| |
| movl $BOOT_OFFSET, %esi |
| movl $AP_BOOT_OFFSET, %edi |
| movl $_hardcoded_unmapped_size, %ecx |
| cld |
| rep movsb |
| |
| #endif |
| |
| call main_bsp # never returns |
| |
| cli |
| hlt |
| 214,9 → 223,3 |
|---|
| .align 4096 |
| page_directory: |
| .space 4096, 0 |
| |
| .global real_bootstrap_gdtr_boot |
| real_bootstrap_gdtr_boot: |
| .word selector(GDT_ITEMS) |
| .long KA2PA(gdt)-BOOT_OFFSET |
| |