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-rw-r--r--arch/x86/kernel/head_32.S9
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)
300 leal -__PAGE_OFFSET(%ecx),%esp 300 leal -__PAGE_OFFSET(%ecx),%esp
301 301
302default_entry: 302default_entry:
303#define CR0_STATE (X86_CR0_PE | X86_CR0_MP | X86_CR0_ET | \
304 X86_CR0_NE | X86_CR0_WP | X86_CR0_AM | \
305 X86_CR0_PG)
306 movl $(CR0_STATE & ~X86_CR0_PG),%eax
307 movl %eax,%cr0
308
303/* 309/*
304 * New page tables may be in 4Mbyte page mode and may 310 * New page tables may be in 4Mbyte page mode and may
305 * be using the global pages. 311 * be using the global pages.
@@ -364,8 +370,7 @@ default_entry:
364 */ 370 */
365 movl $pa(initial_page_table), %eax 371 movl $pa(initial_page_table), %eax
366 movl %eax,%cr3 /* set the page table pointer.. */ 372 movl %eax,%cr3 /* set the page table pointer.. */
367 movl %cr0,%eax 373 movl $CR0_STATE,%eax
368 orl $X86_CR0_PG,%eax
369 movl %eax,%cr0 /* ..and set paging (PG) bit */ 374 movl %eax,%cr0 /* ..and set paging (PG) bit */
370 ljmp $__BOOT_CS,$1f /* Clear prefetch and normalize %eip */ 375 ljmp $__BOOT_CS,$1f /* Clear prefetch and normalize %eip */
3711: 3761: