1 #ifndef _ASM_X86_64_VSYSCALL_H_ 2 #define _ASM_X86_64_VSYSCALL_H_ 3 4 #include <linux/time.h> 5 6 enum 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_xtime __attribute__ ((unused, __section__ (".xtime"), aligned(16))) 23 #define __section_vxtime_sequence __attribute__ ((unused, __section__ (".vxtime_sequence"), aligned(16))) 24 25 struct vxtime_data { 26 long last_tsc; 27 long tsc_quot; 28 long quot; 29 int last; 30 int mode; 31 }; 32 33 #define VXTIME_STUPID 0 34 #define VXTIME_TSC 1 35 #define VXTIME_HPET 2 36 37 #define hpet_readl(a) readl(fix_to_virt(FIX_HPET_BASE) + a) 38 #define hpet_writel(d,a) writel(d, fix_to_virt(FIX_HPET_BASE) + a) 39 40 /* vsyscall space (readonly) */ 41 extern long __vxtime_sequence[2]; 42 extern struct vxtime_data __vxtime; 43 extern struct timeval __xtime; 44 extern volatile unsigned long __jiffies; 45 extern unsigned long __wall_jiffies; 46 extern struct timezone __sys_tz; 47 48 /* kernel space (writeable) */ 49 extern long vxtime_sequence[2]; 50 extern struct vxtime_data vxtime; 51 extern unsigned long wall_jiffies; 52 extern struct timezone sys_tz; 53 54 #define vxtime_lock() do { vxtime_sequence[0]++; wmb(); } while(0) 55 #define vxtime_unlock() do { wmb(); vxtime_sequence[1]++; } while (0) 56 57 #endif /* __KERNEL__ */ 58 59 #endif /* _ASM_X86_64_VSYSCALL_H_ */ 60