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 000000000000..b0c8d4339906
--- /dev/null
+++ b/include/asm-x86_64/vsyscall.h
@@ -0,0 +1,61 @@
+#ifndef _ASM_X86_64_VSYSCALL_H_
+#define _ASM_X86_64_VSYSCALL_H_
+
+#include <linux/seqlock.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_sysctl_vsyscall __attribute__ ((unused, __section__ (".sysctl_vsyscall"), aligned(16)))
+#define __section_xtime __attribute__ ((unused, __section__ (".xtime"), aligned(16)))
+#define __section_xtime_lock __attribute__ ((unused, __section__ (".xtime_lock"), aligned(16)))
+
+#define VXTIME_TSC      1
+#define VXTIME_HPET     2
+
+struct vxtime_data {
+        long hpet_address;      /* HPET base address */
+        unsigned long hz;       /* HPET clocks / sec */
+        int last;
+        unsigned long last_tsc;
+        long quot;
+        long tsc_quot;
+        int mode;
+};
+
+#define hpet_readl(a)           readl((void *)fix_to_virt(FIX_HPET_BASE) + a)
+#define hpet_writel(d,a)        writel(d, (void *)fix_to_virt(FIX_HPET_BASE) + a)
+
+/* vsyscall space (readonly) */
+extern struct vxtime_data __vxtime;
+extern struct timespec __xtime;
+extern volatile unsigned long __jiffies;
+extern unsigned long __wall_jiffies;
+extern struct timezone __sys_tz;
+extern seqlock_t __xtime_lock;
+
+/* kernel space (writeable) */
+extern struct vxtime_data vxtime;
+extern unsigned long wall_jiffies;
+extern struct timezone sys_tz;
+extern int sysctl_vsyscall;
+extern seqlock_t xtime_lock;
+
+#define ARCH_HAVE_XTIME_LOCK 1
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_X86_64_VSYSCALL_H_ */