ia64/xen-unstable

view linux-2.6-xen-sparse/include/asm-xen/asm-x86_64/segment.h @ 8534:da7873110bbb

Tiny bootstrap cleanup.

Signed-off-by: Keir Fraser <keir@xensource.com>
author kaf24@firebug.cl.cam.ac.uk
date Mon Jan 09 19:46:46 2006 +0100 (2006-01-09)
parents 06d84bf87159
children
line source
1 #ifndef _ASM_SEGMENT_H
2 #define _ASM_SEGMENT_H
4 #include <asm/cache.h>
6 #define __KERNEL_CS 0x10
7 #define __KERNEL_DS 0x1b
9 #define __KERNEL32_CS 0x3b
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 */
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
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
32 #define GDT_ENTRY_TLS_ENTRIES 3
34 /* TLS indexes for 64bit - hardcoded in arch_prctl */
35 #define FS_TLS 0
36 #define GS_TLS 1
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)
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)
46 #endif