diff options
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 |