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 |