git://bbs.cooldavid.org / net-next-2.6.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | #ifndef _ASM_SEGMENT_H |
| 2 | #define _ASM_SEGMENT_H | |
| 3 | ||
| 4 | #include <asm/cache.h> | |
| 5 | ||
| 8afd2af8 PA |
6 | /* Simple and small GDT entries for booting only */ |
| 7 | ||
| 8 | #define GDT_ENTRY_BOOT_CS 2 | |
| 9 | #define __BOOT_CS (GDT_ENTRY_BOOT_CS * 8) | |
| 10 | ||
| 11 | #define GDT_ENTRY_BOOT_DS (GDT_ENTRY_BOOT_CS + 1) | |
| 12 | #define __BOOT_DS (GDT_ENTRY_BOOT_DS * 8) | |
| 13 | ||
| 1da177e4 LT |
14 | #define __KERNEL_CS 0x10 |
| 15 | #define __KERNEL_DS 0x18 | |
| 16 | ||
| 30f47289 | 17 | #define __KERNEL32_CS 0x08 |
| 1da177e4 LT |
18 | |
| 19 | /* | |
| 20 | * we cannot use the same code segment descriptor for user and kernel | |
| 21 | * -- not even in the long flat mode, because of different DPL /kkeil | |
| 22 | * The segment offset needs to contain a RPL. Grr. -AK | |
| 23 | * GDT layout to get 64bit syscall right (sysret hardcodes gdt offsets) | |
| 24 | */ | |
| 25 | ||
| 26 | #define __USER32_CS 0x23 /* 4*8+3 */ | |
| 27 | #define __USER_DS 0x2b /* 5*8+3 */ | |
| 28 | #define __USER_CS 0x33 /* 6*8+3 */ | |
| 29 | #define __USER32_DS __USER_DS | |
| 1da177e4 | 30 | |
| 1da177e4 LT |
31 | #define GDT_ENTRY_TSS 8 /* needs two entries */ |
| 32 | #define GDT_ENTRY_LDT 10 /* needs two entries */ | |
| 33 | #define GDT_ENTRY_TLS_MIN 12 | |
| 34 | #define GDT_ENTRY_TLS_MAX 14 | |
| 1da177e4 LT |
35 | |
| 36 | #define GDT_ENTRY_TLS_ENTRIES 3 | |
| 37 | ||
| c08c8205 VP |
38 | #define GDT_ENTRY_PER_CPU 15 /* Abused to load per CPU data from limit */ |
| 39 | #define __PER_CPU_SEG (GDT_ENTRY_PER_CPU * 8 + 3) | |
| 40 | ||
| 1da177e4 LT |
41 | /* TLS indexes for 64bit - hardcoded in arch_prctl */ |
| 42 | #define FS_TLS 0 | |
| 43 | #define GS_TLS 1 | |
| 44 | ||
| 45 | #define GS_TLS_SEL ((GDT_ENTRY_TLS_MIN+GS_TLS)*8 + 3) | |
| 46 | #define FS_TLS_SEL ((GDT_ENTRY_TLS_MIN+FS_TLS)*8 + 3) | |
| 47 | ||
| 48 | #define IDT_ENTRIES 256 | |
| 49 | #define GDT_ENTRIES 16 | |
| 50 | #define GDT_SIZE (GDT_ENTRIES * 8) | |
| 51 | #define TLS_SIZE (GDT_ENTRY_TLS_ENTRIES * 8) | |
| 52 | ||
| 53 | #endif |