| 50,12 → 50,13 |
|---|
| xorw %ax,%ax |
| movw %ax,%ds |
| |
| lgdt gdtr # initialize Global Descriptor Table register |
| lgdt ap_bootstrap_gdtr # initialize Global Descriptor Table register |
| |
| movl %cr0,%eax |
| orl $1,%eax |
| movl %eax,%cr0 # switch to protected mode |
| jmpl $KTEXT,$jump_to_kernel |
| |
| jump_to_kernel: |
| .code32 |
| movw $KDATA,%ax |
| 68,6 → 69,11 |
|---|
| |
| call map_kernel # map kernel and turn paging on |
| |
| movb $0xd1, %al # enable A20 using the keyboard controller |
| outb %al, $0x64 |
| movb $0xdf, %al |
| outb %al, $0x60 |
| |
| jmpl $KTEXT,$main_ap |
| |
| #endif /* __SMP__ */ |