kernel-ark/include/asm-x86_64/vsyscall.h
john stultz 7460ed2844 [PATCH] time: x86_64: re-enable vsyscall support for x86_64
Cleanup and re-enable vsyscall gettimeofday using the generic clocksource
infrastructure.

[akpm@osdl.org: cleanup]
Signed-off-by: John Stultz <johnstul@us.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Andi Kleen <ak@muc.de>
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-16 08:14:00 -08:00

44 lines
1.3 KiB
C

#ifndef _ASM_X86_64_VSYSCALL_H_
#define _ASM_X86_64_VSYSCALL_H_
enum vsyscall_num {
__NR_vgettimeofday,
__NR_vtime,
__NR_vgetcpu,
};
#define VSYSCALL_START (-10UL << 20)
#define VSYSCALL_SIZE 1024
#define VSYSCALL_END (-2UL << 20)
#define VSYSCALL_MAPPED_PAGES 1
#define VSYSCALL_ADDR(vsyscall_nr) (VSYSCALL_START+VSYSCALL_SIZE*(vsyscall_nr))
#ifdef __KERNEL__
#include <linux/seqlock.h>
#define __section_vgetcpu_mode __attribute__ ((unused, __section__ (".vgetcpu_mode"), aligned(16)))
#define __section_jiffies __attribute__ ((unused, __section__ (".jiffies"), aligned(16)))
/* Definitions for CONFIG_GENERIC_TIME definitions */
#define __section_vsyscall_gtod_data __attribute__ \
((unused, __section__ (".vsyscall_gtod_data"),aligned(16)))
#define __vsyscall_fn __attribute__ ((unused,__section__(".vsyscall_fn")))
#define VGETCPU_RDTSCP 1
#define VGETCPU_LSL 2
#define hpet_readl(a) readl((const void __iomem *)fix_to_virt(FIX_HPET_BASE) + a)
#define hpet_writel(d,a) writel(d, (void __iomem *)fix_to_virt(FIX_HPET_BASE) + a)
extern int __vgetcpu_mode;
extern volatile unsigned long __jiffies;
/* kernel space (writeable) */
extern int vgetcpu_mode;
extern struct timezone sys_tz;
extern struct vsyscall_gtod_data_t vsyscall_gtod_data;
#endif /* __KERNEL__ */
#endif /* _ASM_X86_64_VSYSCALL_H_ */