1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
#ifndef _ASM_X86_64_VSYSCALL_H_
#define _ASM_X86_64_VSYSCALL_H_
#include <linux/time.h>
enum vsyscall_num {
__NR_vgettimeofday,
__NR_vtime,
};
#define VSYSCALL_START (-10UL << 20)
#define VSYSCALL_SIZE 1024
#define VSYSCALL_END (-2UL << 20)
#define VSYSCALL_ADDR(vsyscall_nr) (VSYSCALL_START+VSYSCALL_SIZE*(vsyscall_nr))
#ifdef __KERNEL__
#define __section_vxtime __attribute__ ((unused, __section__ (".vxtime"), aligned(16)))
#define __section_wall_jiffies __attribute__ ((unused, __section__ (".wall_jiffies"), aligned(16)))
#define __section_jiffies __attribute__ ((unused, __section__ (".jiffies"), aligned(16)))
#define __section_sys_tz __attribute__ ((unused, __section__ (".sys_tz"), aligned(16)))
#define __section_xtime __attribute__ ((unused, __section__ (".xtime"), aligned(16)))
#define __section_vxtime_sequence __attribute__ ((unused, __section__ (".vxtime_sequence"), aligned(16)))
struct vxtime_data {
long last_tsc;
long tsc_quot;
long quot;
int last;
int mode;
};
#define VXTIME_STUPID 0
#define VXTIME_TSC 1
#define VXTIME_HPET 2
#define hpet_readl(a) readl(fix_to_virt(FIX_HPET_BASE) + a)
#define hpet_writel(d,a) writel(d, fix_to_virt(FIX_HPET_BASE) + a)
/* vsyscall space (readonly) */
extern long __vxtime_sequence[2];
extern struct vxtime_data __vxtime;
extern struct timeval __xtime;
extern volatile unsigned long __jiffies;
extern unsigned long __wall_jiffies;
extern struct timezone __sys_tz;
/* kernel space (writeable) */
extern long vxtime_sequence[2];
extern struct vxtime_data vxtime;
extern unsigned long wall_jiffies;
extern struct timezone sys_tz;
#define vxtime_lock() do { vxtime_sequence[0]++; wmb(); } while(0)
#define vxtime_unlock() do { wmb(); vxtime_sequence[1]++; } while (0)
#endif /* __KERNEL__ */
#endif /* _ASM_X86_64_VSYSCALL_H_ */
|
