diff options
Diffstat (limited to 'arch/x86/secondary.S')
| -rw-r--r-- | arch/x86/secondary.S | 42 |
1 files changed, 38 insertions, 4 deletions
diff --git a/arch/x86/secondary.S b/arch/x86/secondary.S index 14ec3cc654ec..899f90a50d97 100644 --- a/arch/x86/secondary.S +++ b/arch/x86/secondary.S @@ -26,6 +26,7 @@ .balign 4096 _secondary_start: .code16 + .long 0 cli xorl %eax, %eax movl %eax, %cr3 /* Invalidate TLB*/ @@ -58,18 +59,51 @@ _secondary_start: /* Load the Interrupt descriptor table */ lidt idtarg - /* Set the stack pointer, and flag that we are done */ - xorl %eax, %eax - movl secondary_stack, %esp - movl %eax, secondary_stack + /* Set the stack pointer */ + movl _secondary_start, %esp call secondary_cpu_init 1: hlt jmp 1b + .align 4 + +gdt_limit = gdt_end - gdt - 1 /* Compute the table limit. */ + +gdt: +gdtptr: + .word gdt_end - gdt -1 /* Compute the table limit. */ + .long gdt /* We know the offset. */ + .word 0 + + /* selgdt 0x08, flat code segment */ + .word 0xffff, 0x0000 + .byte 0x00, 0x9b, 0xcf, 0x00 + + /* selgdt 0x10, flat data segment */ + .word 0xffff, 0x0000 + .byte 0x00, 0x93, 0xcf, 0x00 + + /* selgdt 0x18, flat code segment for CAR */ + .word 0xffff, 0x0000 + .byte 0x00, 0x9b, 0xcf, 0x00 + + /* selgdt 0x20, flat data segment for CAR */ + .word 0xffff, 0x0000 + .byte 0x00, 0x93, 0xcf, 0x00 +gdt_end: + gdtaddr: .word gdt_limit /* the table limit */ .long gdt /* we know the offset */ +idtarg: + .word _idt_end - _idt - 1 /* limit */ + .long _idt + .word 0 +_idt: + .fill 20, 8, 0 # idt is unitiailzed +_idt_end: + _secondary_start_end: .code32 |