x86: compressed/head_64.S cleanup - use predefined flags from processor-flags.h
We should better use already defined flags from processor-flags.h instead
of defining own ones
[>>> object code check >>>]
original
md5sum: 129f24be6df396fb7d8bf998c01fc716 arch/x86/boot/compressed/head_64.o
text data bss dec hex filename
705 48 45056 45809 b2f1 arch/x86/boot/compressed/head_64.o
patched
md5sum: 129f24be6df396fb7d8bf998c01fc716 arch/x86/boot/compressed/head_64-new.o
text data bss dec hex filename
705 48 45056 45809 b2f1 arch/x86/boot/compressed/head_64-new.o
[<<< object code check <<<]
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/boot/compressed/head_64.S b/arch/x86/boot/compressed/head_64.S
index d8819ef..1d5dff4 100644
--- a/arch/x86/boot/compressed/head_64.S
+++ b/arch/x86/boot/compressed/head_64.S
@@ -30,6 +30,7 @@
#include <asm/page.h>
#include <asm/boot.h>
#include <asm/msr.h>
+#include <asm/processor-flags.h>
#include <asm/asm-offsets.h>
.section ".text.head"
@@ -109,7 +110,7 @@
/* Enable PAE mode */
xorl %eax, %eax
- orl $(1 << 5), %eax
+ orl $(X86_CR4_PAE), %eax
movl %eax, %cr4
/*
@@ -170,7 +171,7 @@
pushl %eax
/* Enter paged protected Mode, activating Long Mode */
- movl $0x80000001, %eax /* Enable Paging and Protected mode */
+ movl $(X86_CR0_PG | X86_CR0_PE), %eax /* Enable Paging and Protected mode */
movl %eax, %cr0
/* Jump from 32bit compatibility mode into 64bit mode. */