diff options
Diffstat (limited to 'arch/x86/realmode')
| -rw-r--r-- | arch/x86/realmode/rm/trampoline_32.S | 8 | ||||
| -rw-r--r-- | arch/x86/realmode/rm/trampoline_64.S | 25 | ||||
| -rw-r--r-- | arch/x86/realmode/rm/trampoline_common.S | 35 |
3 files changed, 33 insertions, 35 deletions
diff --git a/arch/x86/realmode/rm/trampoline_32.S b/arch/x86/realmode/rm/trampoline_32.S index 6fc064b4d2b9..c1b2791183e7 100644 --- a/arch/x86/realmode/rm/trampoline_32.S +++ b/arch/x86/realmode/rm/trampoline_32.S @@ -63,4 +63,12 @@ ENTRY(trampoline_start) ENTRY(startup_32) # note: also used from wakeup_asm.S jmp *%eax + .bss + .balign 8 +GLOBAL(trampoline_header) + tr_start: .space 4 + tr_gdt_pad: .space 2 + tr_gdt: .space 6 +END(trampoline_header) + #include "trampoline_common.S" diff --git a/arch/x86/realmode/rm/trampoline_64.S b/arch/x86/realmode/rm/trampoline_64.S index 66e26f088288..1b9e1bc1ac5e 100644 --- a/arch/x86/realmode/rm/trampoline_64.S +++ b/arch/x86/realmode/rm/trampoline_64.S @@ -125,4 +125,29 @@ ENTRY(startup_64) # Now jump into the kernel using virtual addresses jmpq *tr_start(%rip) + .section ".rodata","a" + # Duplicate the global descriptor table + # so the kernel can live anywhere + .balign 16 + .globl tr_gdt +tr_gdt: + .short tr_gdt_end - tr_gdt - 1 # gdt limit + .long pa_tr_gdt + .short 0 + .quad 0x00cf9b000000ffff # __KERNEL32_CS + .quad 0x00af9b000000ffff # __KERNEL_CS + .quad 0x00cf93000000ffff # __KERNEL_DS +tr_gdt_end: + + .bss + .balign PAGE_SIZE +GLOBAL(trampoline_pgd) .space PAGE_SIZE + + .balign 8 +GLOBAL(trampoline_header) + tr_start: .space 8 + GLOBAL(tr_cr4) .space 4 + GLOBAL(tr_efer) .space 8 +END(trampoline_header) + #include "trampoline_common.S" diff --git a/arch/x86/realmode/rm/trampoline_common.S b/arch/x86/realmode/rm/trampoline_common.S index cac444b942f8..b1ecdb9692ad 100644 --- a/arch/x86/realmode/rm/trampoline_common.S +++ b/arch/x86/realmode/rm/trampoline_common.S @@ -1,42 +1,7 @@ .section ".rodata","a" - -#ifdef CONFIG_X86_64 - # Duplicate the global descriptor table - # so the kernel can live anywhere .balign 16 - .globl tr_gdt -tr_gdt: - .short tr_gdt_end - tr_gdt - 1 # gdt limit - .long pa_tr_gdt - .short 0 - .quad 0x00cf9b000000ffff # __KERNEL32_CS - .quad 0x00af9b000000ffff # __KERNEL_CS - .quad 0x00cf93000000ffff # __KERNEL_DS -tr_gdt_end: -#endif - - .balign 4 tr_idt: .fill 1, 6, 0 .bss - .balign 4 GLOBAL(trampoline_status) .space 4 - - .balign 8 -GLOBAL(trampoline_header) -#ifdef CONFIG_X86_32 - tr_start: .space 4 - tr_gdt_pad: .space 2 - tr_gdt: .space 6 -#else - tr_start: .space 8 - GLOBAL(tr_cr4) .space 4 - GLOBAL(tr_efer) .space 8 -#endif -END(trampoline_header) - -#ifdef CONFIG_X86_64 - .balign PAGE_SIZE -GLOBAL(trampoline_pgd) .space PAGE_SIZE -#endif |