diff options
| author | gorcunov@gmail.com <gorcunov@gmail.com> | 2008-03-23 00:00:08 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-04-17 17:41:29 +0200 |
| commit | fd3af53122e616c0ddba44a3da6d1c1877f72d29 (patch) | |
| tree | 34f1d9d653087ae76e528186c288dd5507f5afe0 /arch/x86/kernel/relocate_kernel_64.S | |
| parent | a7bba17bf09e1c5bdbdd6c0ab0c7833baedf4653 (diff) | |
x86: relocate_kernel - use predefined macroses for processor state
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/relocate_kernel_64.S')
| -rw-r--r-- | arch/x86/kernel/relocate_kernel_64.S | 32 |
1 files changed, 11 insertions, 21 deletions
diff --git a/arch/x86/kernel/relocate_kernel_64.S b/arch/x86/kernel/relocate_kernel_64.S index c2c8b9d6e241..0c93a945b32e 100644 --- a/arch/x86/kernel/relocate_kernel_64.S +++ b/arch/x86/kernel/relocate_kernel_64.S @@ -9,6 +9,7 @@ #include <linux/linkage.h> #include <asm/page.h> #include <asm/kexec.h> +#include <asm/processor-flags.h> /* * Must be relocatable PIC code callable as a C function @@ -171,33 +172,22 @@ identity_mapped: pushq %rdx /* Set cr0 to a known state: - * 31 1 == Paging enabled - * 18 0 == Alignment check disabled - * 16 0 == Write protect disabled - * 3 0 == No task switch - * 2 0 == Don't do FP software emulation. - * 0 1 == Proctected mode enabled + * - Paging enabled + * - Alignment check disabled + * - Write protect disabled + * - No task switch + * - Don't do FP software emulation. + * - Proctected mode enabled */ movq %cr0, %rax - andq $~((1<<18)|(1<<16)|(1<<3)|(1<<2)), %rax - orl $((1<<31)|(1<<0)), %eax + andq $~(X86_CR0_AM | X86_CR0_WP | X86_CR0_TS | X86_CR0_EM), %rax + orl $(X86_CR0_PG | X86_CR0_PE), %eax movq %rax, %cr0 /* Set cr4 to a known state: - * 10 0 == xmm exceptions disabled - * 9 0 == xmm registers instructions disabled - * 8 0 == performance monitoring counter disabled - * 7 0 == page global disabled - * 6 0 == machine check exceptions disabled - * 5 1 == physical address extension enabled - * 4 0 == page size extensions disabled - * 3 0 == Debug extensions disabled - * 2 0 == Time stamp disable (disabled) - * 1 0 == Protected mode virtual interrupts disabled - * 0 0 == VME disabled + * - physical address extension enabled */ - - movq $((1<<5)), %rax + movq $X86_CR4_PAE, %rax movq %rax, %cr4 jmp 1f |