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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>
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#include <asm/cache.h>
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/* Simple and small GDT entries for booting only */
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#define GDT_ENTRY_BOOT_CS 2
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#define __BOOT_CS (GDT_ENTRY_BOOT_CS * 8)
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#define GDT_ENTRY_BOOT_DS (GDT_ENTRY_BOOT_CS + 1)
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#define __BOOT_DS (GDT_ENTRY_BOOT_DS * 8)
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#define __KERNEL_CS 0x10
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#define __KERNEL_DS 0x18
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