| 47,27 → 47,33 |
|---|
| ap_boot: |
| .code16 |
| cli |
| xorw %ax,%ax |
| movw %ax,%ds |
| 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 |
| 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 |
| movw %ax,%ds |
| movw %ax,%es |
| movw %ax,%ss |
| movl $(ctx-0x80000000),%eax # KA2PA((__address) &ctx) |
| movl (%eax),%esp |
| subl $0x80000000,%esp # KA2PA(ctx.sp) |
| movw $KDATA, %ax |
| movw %ax, %ds |
| movw %ax, %es |
| movw %ax, %ss |
| movl $(ctx-0x80000000), %eax # KA2PA((__address) &ctx) |
| movl (%eax), %esp |
| subl $0x80000000, %esp # KA2PA(ctx.sp) |
| |
| call map_kernel # map kernel and turn paging on |
| 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 |
| jmpl $KTEXT, $main_ap |
| |
| #endif /* __SMP__ */ |