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1da177e4 LT |
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 | ||
30f47289 | 9 | #define __KERNEL32_CS 0x08 |
1da177e4 LT |
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 | |
1da177e4 | 22 | |
1da177e4 LT |
23 | #define GDT_ENTRY_TSS 8 /* needs two entries */ |
24 | #define GDT_ENTRY_LDT 10 /* needs two entries */ | |
25 | #define GDT_ENTRY_TLS_MIN 12 | |
26 | #define GDT_ENTRY_TLS_MAX 14 | |
1da177e4 LT |
27 | |
28 | #define GDT_ENTRY_TLS_ENTRIES 3 | |
29 | ||
c08c8205 VP |
30 | #define GDT_ENTRY_PER_CPU 15 /* Abused to load per CPU data from limit */ |
31 | #define __PER_CPU_SEG (GDT_ENTRY_PER_CPU * 8 + 3) | |
32 | ||
1da177e4 LT |
33 | /* TLS indexes for 64bit - hardcoded in arch_prctl */ |
34 | #define FS_TLS 0 | |
35 | #define GS_TLS 1 | |
36 | ||
37 | #define GS_TLS_SEL ((GDT_ENTRY_TLS_MIN+GS_TLS)*8 + 3) | |
38 | #define FS_TLS_SEL ((GDT_ENTRY_TLS_MIN+FS_TLS)*8 + 3) | |
39 | ||
40 | #define IDT_ENTRIES 256 | |
41 | #define GDT_ENTRIES 16 | |
42 | #define GDT_SIZE (GDT_ENTRIES * 8) | |
43 | #define TLS_SIZE (GDT_ENTRY_TLS_ENTRIES * 8) | |
44 | ||
45 | #endif |