1 #ifndef _ASM_X86_VSYSCALL_H
2 #define _ASM_X86_VSYSCALL_H
3
4 enum vsyscall_num {
5 __NR_vgettimeofday,
6 __NR_vtime,
7 __NR_vgetcpu,
8 };
9
10 #define VSYSCALL_START (-10UL << 20)
11 #define VSYSCALL_SIZE 1024
12 #define VSYSCALL_END (-2UL << 20)
13 #define VSYSCALL_MAPPED_PAGES 1
14 #define VSYSCALL_ADDR(vsyscall_nr) (VSYSCALL_START+VSYSCALL_SIZE*(vsyscall_nr))
15
16 #ifdef __KERNEL__
17 #include <linux/seqlock.h>
18
19 #define __section_vgetcpu_mode __attribute__ ((unused, __section__ (".vgetcpu_mode"), aligned(16)))
20 #define __section_jiffies __attribute__ ((unused, __section__ (".jiffies"), aligned(16)))
21
22 /* Definitions for CONFIG_GENERIC_TIME definitions */
23 #define __section_vsyscall_gtod_data __attribute__ \
24 ((unused, __section__ (".vsyscall_gtod_data"),aligned(16)))
25 #define __section_vsyscall_clock __attribute__ \
26 ((unused, __section__ (".vsyscall_clock"),aligned(16)))
27 #define __vsyscall_fn \
28 __attribute__ ((unused, __section__(".vsyscall_fn"))) notrace
29
30 #define VGETCPU_RDTSCP 1
31 #define VGETCPU_LSL 2
32
33 extern int __vgetcpu_mode;
34 extern volatile unsigned long __jiffies;
35
36 /* kernel space (writeable) */
37 extern int vgetcpu_mode;
38 extern struct timezone sys_tz;
39
40 extern void map_vsyscall(void);
41
42 #endif /* __KERNEL__ */
43
44 #endif /* _ASM_X86_VSYSCALL_H */
45
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