vsyscall.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:2k
- #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_hpet __attribute__ ((unused, __section__ (".hpet"), 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 hpet_data {
- long address; /* base address */
- unsigned long hz; /* HPET clocks / sec */
- int trigger; /* value at last interrupt */
- int last;
- int offset;
- unsigned long last_tsc;
- long ticks;
- };
- #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 hpet_data __hpet;
- 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 hpet_data hpet;
- 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_ */