include/asm-x86_64/vsyscall.h

   1 #ifndef _ASM_X86_64_VSYSCALL_H_
   2 #define _ASM_X86_64_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_ADDR(vsyscall_nr) (VSYSCALL_START+VSYSCALL_SIZE*(vsyscall_nr))
  14
  15 #ifdef __KERNEL__
  16 #include <linux/seqlock.h>
  17
  18 #define __section_vxtime __attribute__ ((unused, __section__ (".vxtime"), aligned(16)))
  19 #define __section_vgetcpu_mode __attribute__ ((unused, __section__ (".vgetcpu_mode"), 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 #define VXTIME_PMTMR    3
  29
  30 #define VGETCPU_RDTSCP  1
  31 #define VGETCPU_LSL     2
  32
  33 struct vxtime_data {
  34         long hpet_address;      /* HPET base address */
  35         int last;
  36         unsigned long last_tsc;
  37         long quot;
  38         long tsc_quot;
  39         int mode;
  40 };
  41
  42 #define hpet_readl(a)           readl((const void __iomem *)fix_to_virt(FIX_HPET_BASE) + a)
  43 #define hpet_writel(d,a)        writel(d, (void __iomem *)fix_to_virt(FIX_HPET_BASE) + a)
  44
  45 /* vsyscall space (readonly) */
  46 extern struct vxtime_data __vxtime;
  47 extern int __vgetcpu_mode;
  48 extern struct timespec __xtime;
  49 extern volatile unsigned long __jiffies;
  50 extern struct timezone __sys_tz;
  51 extern seqlock_t __xtime_lock;
  52
  53 /* kernel space (writeable) */
  54 extern struct vxtime_data vxtime;
  55 extern int vgetcpu_mode;
  56 extern struct timezone sys_tz;
  57 extern int sysctl_vsyscall;
  58 extern seqlock_t xtime_lock;
  59
  60 extern int sysctl_vsyscall;
  61
  62 extern void vsyscall_set_cpu(int cpu);
  63
  64 #define ARCH_HAVE_XTIME_LOCK 1
  65
  66 #endif /* __KERNEL__ */
  67
  68 #endif /* _ASM_X86_64_VSYSCALL_H_ */