blob: 05cb8dd200de7742456de435aa31c586b5df2776 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _ASM_X86_64_VSYSCALL_H_
2#define _ASM_X86_64_VSYSCALL_H_
3
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
19#define __section_vxtime __attribute__ ((unused, __section__ (".vxtime"), aligned(16)))
Vojtech Pavlikc08c8202006-09-26 10:52:28 +020020#define __section_vgetcpu_mode __attribute__ ((unused, __section__ (".vgetcpu_mode"), aligned(16)))
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#define __section_jiffies __attribute__ ((unused, __section__ (".jiffies"), aligned(16)))
22#define __section_sys_tz __attribute__ ((unused, __section__ (".sys_tz"), aligned(16)))
23#define __section_sysctl_vsyscall __attribute__ ((unused, __section__ (".sysctl_vsyscall"), aligned(16)))
24#define __section_xtime __attribute__ ((unused, __section__ (".xtime"), aligned(16)))
25#define __section_xtime_lock __attribute__ ((unused, __section__ (".xtime_lock"), aligned(16)))
26
27#define VXTIME_TSC 1
28#define VXTIME_HPET 2
Andi Kleen312df5f2005-05-16 21:53:28 -070029#define VXTIME_PMTMR 3
Linus Torvalds1da177e2005-04-16 15:20:36 -070030
Vojtech Pavlikc08c8202006-09-26 10:52:28 +020031#define VGETCPU_RDTSCP 1
32#define VGETCPU_LSL 2
33
Linus Torvalds1da177e2005-04-16 15:20:36 -070034struct vxtime_data {
35 long hpet_address; /* HPET base address */
Linus Torvalds1da177e2005-04-16 15:20:36 -070036 int last;
37 unsigned long last_tsc;
38 long quot;
39 long tsc_quot;
40 int mode;
41};
42
Stephen Hemminger77a75332006-01-11 22:46:30 +010043#define hpet_readl(a) readl((const void __iomem *)fix_to_virt(FIX_HPET_BASE) + a)
44#define hpet_writel(d,a) writel(d, (void __iomem *)fix_to_virt(FIX_HPET_BASE) + a)
Linus Torvalds1da177e2005-04-16 15:20:36 -070045
46/* vsyscall space (readonly) */
47extern struct vxtime_data __vxtime;
Vojtech Pavlikc08c8202006-09-26 10:52:28 +020048extern int __vgetcpu_mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -070049extern struct timespec __xtime;
50extern volatile unsigned long __jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -070051extern struct timezone __sys_tz;
52extern seqlock_t __xtime_lock;
53
54/* kernel space (writeable) */
55extern struct vxtime_data vxtime;
Vojtech Pavlikc08c8202006-09-26 10:52:28 +020056extern int vgetcpu_mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -070057extern struct timezone sys_tz;
58extern int sysctl_vsyscall;
59extern seqlock_t xtime_lock;
60
Andi Kleen312df5f2005-05-16 21:53:28 -070061extern int sysctl_vsyscall;
62
Linus Torvalds1da177e2005-04-16 15:20:36 -070063#define ARCH_HAVE_XTIME_LOCK 1
64
65#endif /* __KERNEL__ */
66
67#endif /* _ASM_X86_64_VSYSCALL_H_ */