X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=arch%2Fx86%2Fkernel%2Frelocate_kernel_64.S;h=f5afe665a82b27f4aed8503b2ae4478b834a805a;hb=d3ee1b405872214609868f3cde631ac157026dd0;hp=14e95872c6a3aef01c32889d5a78586c2c0780f4;hpb=2843483d2eb02ad104edbe8b2429fb6a39d25063;p=linux-2.6

diff --git a/arch/x86/kernel/relocate_kernel_64.S b/arch/x86/kernel/relocate_kernel_64.S
index 14e95872c6..f5afe665a8 100644
--- a/arch/x86/kernel/relocate_kernel_64.S
+++ b/arch/x86/kernel/relocate_kernel_64.S
@@ -9,17 +9,18 @@
 #include <linux/linkage.h>
 #include <asm/page.h>
 #include <asm/kexec.h>
+#include <asm/processor-flags.h>
+#include <asm/pgtable.h>
 
 /*
  * Must be relocatable PIC code callable as a C function
  */
 
 #define PTR(x) (x << 3)
-#define PAGE_ALIGNED (1 << PAGE_SHIFT)
-#define PAGE_ATTR 0x63 /* _PAGE_PRESENT|_PAGE_RW|_PAGE_ACCESSED|_PAGE_DIRTY */
+#define PAGE_ATTR (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY)
 
 	.text
-	.align PAGE_ALIGNED
+	.align PAGE_SIZE
 	.code64
 	.globl relocate_kernel
 relocate_kernel:
@@ -160,7 +161,7 @@ relocate_new_kernel:
 	movq	%r9, %cr3
 
 	/* setup a new stack at the end of the physical control page */
-	lea	4096(%r8), %rsp
+	lea	PAGE_SIZE(%r8), %rsp
 
 	/* jump to identity mapped page */
 	addq	$(identity_mapped - relocate_kernel), %r8
@@ -172,33 +173,22 @@ 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