fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / include / asm-x86 / segment_64.h
blob04b8ab21328faed255f2cfca4d02f267c9fd5fb3
1 #ifndef _ASM_SEGMENT_H
2 #define _ASM_SEGMENT_H
4 #include <asm/cache.h>
6 /* Simple and small GDT entries for booting only */
8 #define GDT_ENTRY_BOOT_CS 2
9 #define __BOOT_CS (GDT_ENTRY_BOOT_CS * 8)
11 #define GDT_ENTRY_BOOT_DS (GDT_ENTRY_BOOT_CS + 1)
12 #define __BOOT_DS (GDT_ENTRY_BOOT_DS * 8)
14 #define __KERNEL_CS 0x10
15 #define __KERNEL_DS 0x18
17 #define __KERNEL32_CS 0x08
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)
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
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
36 #define GDT_ENTRY_TLS_ENTRIES 3
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)
41 /* TLS indexes for 64bit - hardcoded in arch_prctl */
42 #define FS_TLS 0
43 #define GS_TLS 1
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)
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)
53 #endif