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H. Peter Anvin1965aae2008-10-22 22:26:29 -07001#ifndef _ASM_X86_VSYSCALL_H
2#define _ASM_X86_VSYSCALL_H
Linus Torvalds1da177e2005-04-16 15:20:36 -07003
Linus Torvalds1da177e2005-04-16 15:20:36 -07004enum vsyscall_num {
5 __NR_vgettimeofday,
6 __NR_vtime,
Vojtech Pavlikc08c8202006-09-26 10:52:28 +02007 __NR_vgetcpu,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008};
9
10#define VSYSCALL_START (-10UL << 20)
11#define VSYSCALL_SIZE 1024
12#define VSYSCALL_END (-2UL << 20)
Ernie Petrides103efcd2006-12-07 02:14:09 +010013#define VSYSCALL_MAPPED_PAGES 1
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#define VSYSCALL_ADDR(vsyscall_nr) (VSYSCALL_START+VSYSCALL_SIZE*(vsyscall_nr))
15
16#ifdef __KERNEL__
David Woodhouse75da7362006-09-16 12:15:48 -070017#include <linux/seqlock.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018
Vojtech Pavlikc08c8202006-09-26 10:52:28 +020019#define __section_vgetcpu_mode __attribute__ ((unused, __section__ (".vgetcpu_mode"), aligned(16)))
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#define __section_jiffies __attribute__ ((unused, __section__ (".jiffies"), aligned(16)))
Linus Torvalds1da177e2005-04-16 15:20:36 -070021
john stultz7460ed22007-02-16 01:28:21 -080022/* Definitions for CONFIG_GENERIC_TIME definitions */
23#define __section_vsyscall_gtod_data __attribute__ \
24 ((unused, __section__ (".vsyscall_gtod_data"),aligned(16)))
Andi Kleen2aae9502007-07-21 17:10:01 +020025#define __section_vsyscall_clock __attribute__ \
26 ((unused, __section__ (".vsyscall_clock"),aligned(16)))
Steven Rostedt23adec52008-05-12 21:20:41 +020027#define __vsyscall_fn \
28 __attribute__ ((unused, __section__(".vsyscall_fn"))) notrace
Linus Torvalds1da177e2005-04-16 15:20:36 -070029
Vojtech Pavlikc08c8202006-09-26 10:52:28 +020030#define VGETCPU_RDTSCP 1
31#define VGETCPU_LSL 2
32
Vojtech Pavlikc08c8202006-09-26 10:52:28 +020033extern int __vgetcpu_mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -070034extern volatile unsigned long __jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -070035
36/* kernel space (writeable) */
Vojtech Pavlikc08c8202006-09-26 10:52:28 +020037extern int vgetcpu_mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -070038extern struct timezone sys_tz;
Linus Torvalds1da177e2005-04-16 15:20:36 -070039
Ingo Molnare4026442008-01-30 13:32:39 +010040extern void map_vsyscall(void);
41
Linus Torvalds1da177e2005-04-16 15:20:36 -070042#endif /* __KERNEL__ */
43
H. Peter Anvin1965aae2008-10-22 22:26:29 -070044#endif /* _ASM_X86_VSYSCALL_H */