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| author | H. Peter Anvin <hpa@linux.intel.com> | 2013-02-12 15:47:45 -0800 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2013-02-12 15:47:45 -0800 |
| commit | 8ecba5af948cb58bf6d5eb1537c0df53cbc319c4 (patch) | |
| tree | 83775a334c9e4be97b5dbf3f0a1d86854b10c4c1 /arch/x86/kernel/head_32.S | |
| parent | 2b9b6d8c715b23fa119261c32ad360681f4464a9 (diff) | |
| parent | 836dc9e3fbbab0c30aa6e664417225f5c1fb1c39 (diff) | |
| download | lwn-8ecba5af948cb58bf6d5eb1537c0df53cbc319c4.tar.gz lwn-8ecba5af948cb58bf6d5eb1537c0df53cbc319c4.zip | |
Merge tag 'v3.8-rc7' into x86/asm
Merge in the updates to head_32.S from the previous urgent branch, as
upcoming patches will make further changes.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/kernel/head_32.S')
| -rw-r--r-- | arch/x86/kernel/head_32.S | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S index 8e7f6556028f..c8932c79e78b 100644 --- a/arch/x86/kernel/head_32.S +++ b/arch/x86/kernel/head_32.S @@ -300,6 +300,12 @@ ENTRY(startup_32_smp) leal -__PAGE_OFFSET(%ecx),%esp default_entry: +#define CR0_STATE (X86_CR0_PE | X86_CR0_MP | X86_CR0_ET | \ + X86_CR0_NE | X86_CR0_WP | X86_CR0_AM | \ + X86_CR0_PG) + movl $(CR0_STATE & ~X86_CR0_PG),%eax + movl %eax,%cr0 + /* * New page tables may be in 4Mbyte page mode and may * be using the global pages. @@ -364,8 +370,7 @@ default_entry: */ movl $pa(initial_page_table), %eax movl %eax,%cr3 /* set the page table pointer.. */ - movl %cr0,%eax - orl $X86_CR0_PG,%eax + movl $CR0_STATE,%eax movl %eax,%cr0 /* ..and set paging (PG) bit */ ljmp $__BOOT_CS,$1f /* Clear prefetch and normalize %eip */ 1: |