From: H. Peter Anvin <hpa@zytor.com>
Date: Wed, 11 Jul 2007 19:18:37 +0000 (-0700)
Subject: x86-64: add symbolic constants for the boot segment selectors
X-Git-Tag: v2.6.23-rc1~1134
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8afd2af88921c2cb1c9540cecd0714da7ae4fcd0;p=linux-2.6

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>
---

diff --git a/include/asm-x86_64/segment.h b/include/asm-x86_64/segment.h
index adf2bf1e18..04b8ab2132 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