diff options
| author | Glauber de Oliveira Costa <gcosta@redhat.com> | 2008-01-30 13:31:09 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:31:09 +0100 |
| commit | 15ee09b40831ae88eb8a804a647b6935eb8b7114 (patch) | |
| tree | bbb9e9e09b3f058a59052d4e682619221dbd25ca /include/asm-x86/segment.h | |
| parent | cef189508b2f043fdc2e354645803b6ce004aac3 (diff) | |
x86: unify common parts of segment.h
Although segment handling in i386 and x86_64 are very different,
there's a common part. Put them in segment.h instead of arch specific
headers
Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/asm-x86/segment.h')
| -rw-r--r-- | include/asm-x86/segment.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/asm-x86/segment.h b/include/asm-x86/segment.h index b3a7a3e9fb19..3c9b306bc4bf 100644 --- a/include/asm-x86/segment.h +++ b/include/asm-x86/segment.h @@ -11,4 +11,20 @@ #define get_kernel_rpl() 0 #endif +/* User mode is privilege level 3 */ +#define USER_RPL 0x3 +/* LDT segment has TI set, GDT has it cleared */ +#define SEGMENT_LDT 0x4 +#define SEGMENT_GDT 0x0 + +/* Bottom two bits of selector give the ring privilege level */ +#define SEGMENT_RPL_MASK 0x3 +/* Bit 2 is table indicator (LDT/GDT) */ +#define SEGMENT_TI_MASK 0x4 + +#define IDT_ENTRIES 256 +#define GDT_SIZE (GDT_ENTRIES * 8) +#define GDT_ENTRY_TLS_ENTRIES 3 +#define TLS_SIZE (GDT_ENTRY_TLS_ENTRIES * 8) + #endif |