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1da177e4 LT |
1 | #ifndef _ASM_X86_64_VSYSCALL_H_ |
2 | #define _ASM_X86_64_VSYSCALL_H_ | |
3 | ||
1da177e4 LT |
4 | enum vsyscall_num { |
5 | __NR_vgettimeofday, | |
6 | __NR_vtime, | |
7 | }; | |
8 | ||
9 | #define VSYSCALL_START (-10UL << 20) | |
10 | #define VSYSCALL_SIZE 1024 | |
11 | #define VSYSCALL_END (-2UL << 20) | |
12 | #define VSYSCALL_ADDR(vsyscall_nr) (VSYSCALL_START+VSYSCALL_SIZE*(vsyscall_nr)) | |
13 | ||
14 | #ifdef __KERNEL__ | |
75da736f | 15 | #include <linux/seqlock.h> |
1da177e4 LT |
16 | |
17 | #define __section_vxtime __attribute__ ((unused, __section__ (".vxtime"), aligned(16))) | |
18 | #define __section_wall_jiffies __attribute__ ((unused, __section__ (".wall_jiffies"), aligned(16))) | |
19 | #define __section_jiffies __attribute__ ((unused, __section__ (".jiffies"), aligned(16))) | |
20 | #define __section_sys_tz __attribute__ ((unused, __section__ (".sys_tz"), aligned(16))) | |
21 | #define __section_sysctl_vsyscall __attribute__ ((unused, __section__ (".sysctl_vsyscall"), aligned(16))) | |
22 | #define __section_xtime __attribute__ ((unused, __section__ (".xtime"), aligned(16))) | |
23 | #define __section_xtime_lock __attribute__ ((unused, __section__ (".xtime_lock"), aligned(16))) | |
24 | ||
25 | #define VXTIME_TSC 1 | |
26 | #define VXTIME_HPET 2 | |
312df5f1 | 27 | #define VXTIME_PMTMR 3 |
1da177e4 LT |
28 | |
29 | struct vxtime_data { | |
30 | long hpet_address; /* HPET base address */ | |
1da177e4 LT |
31 | int last; |
32 | unsigned long last_tsc; | |
33 | long quot; | |
34 | long tsc_quot; | |
35 | int mode; | |
36 | }; | |
37 | ||
77a75333 SH |
38 | #define hpet_readl(a) readl((const void __iomem *)fix_to_virt(FIX_HPET_BASE) + a) |
39 | #define hpet_writel(d,a) writel(d, (void __iomem *)fix_to_virt(FIX_HPET_BASE) + a) | |
1da177e4 LT |
40 | |
41 | /* vsyscall space (readonly) */ | |
42 | extern struct vxtime_data __vxtime; | |
43 | extern struct timespec __xtime; | |
44 | extern volatile unsigned long __jiffies; | |
45 | extern unsigned long __wall_jiffies; | |
46 | extern struct timezone __sys_tz; | |
47 | extern seqlock_t __xtime_lock; | |
48 | ||
49 | /* kernel space (writeable) */ | |
50 | extern struct vxtime_data vxtime; | |
51 | extern unsigned long wall_jiffies; | |
52 | extern struct timezone sys_tz; | |
53 | extern int sysctl_vsyscall; | |
54 | extern seqlock_t xtime_lock; | |
55 | ||
312df5f1 AK |
56 | extern int sysctl_vsyscall; |
57 | ||
1da177e4 LT |
58 | #define ARCH_HAVE_XTIME_LOCK 1 |
59 | ||
60 | #endif /* __KERNEL__ */ | |
61 | ||
62 | #endif /* _ASM_X86_64_VSYSCALL_H_ */ |