| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _ASM_SEGMENT_H |
| 2 | #define _ASM_SEGMENT_H |
| 3 | |
| 4 | #include <asm/cache.h> |
| 5 | |
| 6 | #define __KERNEL_CS 0x10 |
| 7 | #define __KERNEL_DS 0x18 |
| 8 | |
| 9 | #define __KERNEL32_CS 0x38 |
| 10 | |
| 11 | /* |
| 12 | * we cannot use the same code segment descriptor for user and kernel |
| 13 | * -- not even in the long flat mode, because of different DPL /kkeil |
| 14 | * The segment offset needs to contain a RPL. Grr. -AK |
| 15 | * GDT layout to get 64bit syscall right (sysret hardcodes gdt offsets) |
| 16 | */ |
| 17 | |
| 18 | #define __USER32_CS 0x23 /* 4*8+3 */ |
| 19 | #define __USER_DS 0x2b /* 5*8+3 */ |
| 20 | #define __USER_CS 0x33 /* 6*8+3 */ |
| 21 | #define __USER32_DS __USER_DS |
| 22 | #define __KERNEL16_CS (GDT_ENTRY_KERNELCS16 * 8) |
| 23 | #define __KERNEL_COMPAT32_CS 0x8 |
| 24 | |
| 25 | #define GDT_ENTRY_TLS 1 |
| 26 | #define GDT_ENTRY_TSS 8 /* needs two entries */ |
| 27 | #define GDT_ENTRY_LDT 10 /* needs two entries */ |
| 28 | #define GDT_ENTRY_TLS_MIN 12 |
| 29 | #define GDT_ENTRY_TLS_MAX 14 |
| 30 | #define GDT_ENTRY_KERNELCS16 15 |
| 31 | |
| 32 | #define GDT_ENTRY_TLS_ENTRIES 3 |
| 33 | |
| 34 | /* TLS indexes for 64bit - hardcoded in arch_prctl */ |
| 35 | #define FS_TLS 0 |
| 36 | #define GS_TLS 1 |
| 37 | |
| 38 | #define GS_TLS_SEL ((GDT_ENTRY_TLS_MIN+GS_TLS)*8 + 3) |
| 39 | #define FS_TLS_SEL ((GDT_ENTRY_TLS_MIN+FS_TLS)*8 + 3) |
| 40 | |
| 41 | #define IDT_ENTRIES 256 |
| 42 | #define GDT_ENTRIES 16 |
| 43 | #define GDT_SIZE (GDT_ENTRIES * 8) |
| 44 | #define TLS_SIZE (GDT_ENTRY_TLS_ENTRIES * 8) |
| 45 | |
| 46 | #endif |