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authorH. Peter Anvin <hpa@zytor.com>2007-07-11 12:18:37 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-12 10:55:54 -0700
commit8afd2af88921c2cb1c9540cecd0714da7ae4fcd0 (patch)
tree162a4de59d8dab371f5568bf37ea7de7af59115f
parent77e1dd654bc24182a7ad34f415abd488ae7af6eb (diff)
x86-64: add symbolic constants for the boot segment selectors
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>
-rw-r--r--include/asm-x86_64/segment.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/asm-x86_64/segment.h b/include/asm-x86_64/segment.h
index adf2bf1e187..04b8ab21328 100644
--- a/include/asm-x86_64/segment.h
+++ b/include/asm-x86_64/segment.h
@@ -3,6 +3,14 @@
#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_DS 0x18