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x86-64: add symbolic constants for the boot segment selectors

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Add symbolic constants for the segment selectors/GDT slots used by
the setup code, for consistency with i386.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
H. Peter Anvin 2007-07-11 12:18:37 -07:00 committed by Linus Torvalds
parent 77e1dd654b
commit 8afd2af889
1 changed files with 8 additions and 0 deletions
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8
include/asm-x86_64/segment.h
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@ -3,6 +3,14 @@
#include <asm/cache.h> #include <asm/cache.h>
/* Simple and small GDT entries for booting only */
#define GDT_ENTRY_BOOT_CS 2
#define __BOOT_CS (GDT_ENTRY_BOOT_CS * 8)
#define GDT_ENTRY_BOOT_DS (GDT_ENTRY_BOOT_CS + 1)
#define __BOOT_DS (GDT_ENTRY_BOOT_DS * 8)
#define __KERNEL_CS 0x10 #define __KERNEL_CS 0x10
#define __KERNEL_DS 0x18 #define __KERNEL_DS 0x18