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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-x86_64/vsyscall.h
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'include/asm-x86_64/vsyscall.h')
-rw-r--r--include/asm-x86_64/vsyscall.h61
1 files changed, 61 insertions, 0 deletions
diff --git a/include/asm-x86_64/vsyscall.h b/include/asm-x86_64/vsyscall.h
new file mode 100644
index 00000000000..b0c8d433990
--- /dev/null
+++ b/include/asm-x86_64/vsyscall.h
@@ -0,0 +1,61 @@
1#ifndef _ASM_X86_64_VSYSCALL_H_
2#define _ASM_X86_64_VSYSCALL_H_
3
4#include <linux/seqlock.h>
5
6enum vsyscall_num {
7 __NR_vgettimeofday,
8 __NR_vtime,
9};
10
11#define VSYSCALL_START (-10UL << 20)
12#define VSYSCALL_SIZE 1024
13#define VSYSCALL_END (-2UL << 20)
14#define VSYSCALL_ADDR(vsyscall_nr) (VSYSCALL_START+VSYSCALL_SIZE*(vsyscall_nr))
15
16#ifdef __KERNEL__
17
18#define __section_vxtime __attribute__ ((unused, __section__ (".vxtime"), aligned(16)))
19#define __section_wall_jiffies __attribute__ ((unused, __section__ (".wall_jiffies"), aligned(16)))
20#define __section_jiffies __attribute__ ((unused, __section__ (".jiffies"), aligned(16)))
21#define __section_sys_tz __attribute__ ((unused, __section__ (".sys_tz"), aligned(16)))
22#define __section_sysctl_vsyscall __attribute__ ((unused, __section__ (".sysctl_vsyscall"), aligned(16)))
23#define __section_xtime __attribute__ ((unused, __section__ (".xtime"), aligned(16)))
24#define __section_xtime_lock __attribute__ ((unused, __section__ (".xtime_lock"), aligned(16)))
25
26#define VXTIME_TSC 1
27#define VXTIME_HPET 2
28
29struct vxtime_data {
30 long hpet_address; /* HPET base address */
31 unsigned long hz; /* HPET clocks / sec */
32 int last;
33 unsigned long last_tsc;
34 long quot;
35 long tsc_quot;
36 int mode;
37};
38
39#define hpet_readl(a) readl((void *)fix_to_virt(FIX_HPET_BASE) + a)
40#define hpet_writel(d,a) writel(d, (void *)fix_to_virt(FIX_HPET_BASE) + a)
41
42/* vsyscall space (readonly) */
43extern struct vxtime_data __vxtime;
44extern struct timespec __xtime;
45extern volatile unsigned long __jiffies;
46extern unsigned long __wall_jiffies;
47extern struct timezone __sys_tz;
48extern seqlock_t __xtime_lock;
49
50/* kernel space (writeable) */
51extern struct vxtime_data vxtime;
52extern unsigned long wall_jiffies;
53extern struct timezone sys_tz;
54extern int sysctl_vsyscall;
55extern seqlock_t xtime_lock;
56
57#define ARCH_HAVE_XTIME_LOCK 1
58
59#endif /* __KERNEL__ */
60
61#endif /* _ASM_X86_64_VSYSCALL_H_ */