| 52,7 → 52,7 |
|---|
| |
| call memmap_arch_init |
| |
| lgdt bsp_bootstrap_gdtr # initialize Global Descriptor Table register |
| lgdt real_bootstrap_gdtr # initialize Global Descriptor Table register |
| |
| movl %cr0, %eax |
| orl $0x1, %eax |
| 93,27 → 93,29 |
|---|
| cld |
| rep movsb |
| |
| jmp protected |
| call main_bsp # never returns |
| |
| cli |
| hlt |
| |
| multiboot_image_start: |
| movl BOOTSTRAP_OFFSET - 0x400, %esp # initialize stack pointer |
| movl $BOOTSTRAP_OFFSET - 0x400, %esp # initialize stack pointer |
| |
| lgdt gdtr # initialize Global Descriptor Table register |
| lgdt protected_bootstrap_gdtr - 0x80000000 # initialize Global Descriptor Table register |
| |
| movw $KDATA, %ax |
| movw %ax, %es |
| movw %ax, %gs |
| movw %ax, %fs |
| movw %ax, %ds # kernel data + stack |
| movw %ax, %ds # kernel data + stack |
| movw %ax, %ss |
| |
| jmpl $KTEXT, $multiboot_meeting_point |
| jmpl $KTEXT, $multiboot_meeting_point + BOOT_OFFSET |
| multiboot_meeting_point: |
| |
| call map_kernel # map kernel and turn paging on |
| call map_kernel # map kernel and turn paging on |
| |
| protected: |
| call main_bsp # never returns |
| call main_bsp - BOOT_OFFSET # never returns |
| |
| cli |
| hlt |