[deliverable/linux.git] / arch / x86 / include / asm / vsyscall.h

#ifndef _ASM_X86_VSYSCALL_H
#define _ASM_X86_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 VGETCPU_RDTSCP	1
#define VGETCPU_LSL	2

/* kernel space (writeable) */
extern int vgetcpu_mode;
extern struct timezone sys_tz;

#include <asm/vvar.h>

extern void map_vsyscall(void);

/*
 * Called on instruction fetch fault in vsyscall page.
 * Returns true if handled.
 */
extern bool emulate_vsyscall(struct pt_regs *regs, unsigned long address);

#endif /* __KERNEL__ */

#endif /* _ASM_X86_VSYSCALL_H */
Commit	Line	Data
1965aae3 PA	1	#ifndef _ASM_X86_VSYSCALL_H
1965aae3 PA	2	#define _ASM_X86_VSYSCALL_H
1da177e4	3
1da177e4 LT	4	enum vsyscall_num {
	5	__NR_vgettimeofday,
	6	__NR_vtime,
c08c8205	7	__NR_vgetcpu,
1da177e4 LT	8	};
	9
	10	#define VSYSCALL_START (-10UL << 20)
	11	#define VSYSCALL_SIZE 1024
	12	#define VSYSCALL_END (-2UL << 20)
103efcd9	13	#define VSYSCALL_MAPPED_PAGES 1
1da177e4 LT	14	#define VSYSCALL_ADDR(vsyscall_nr) (VSYSCALL_START+VSYSCALL_SIZE*(vsyscall_nr))
	15
	16	#ifdef __KERNEL__
75da736f	17	#include <linux/seqlock.h>
1da177e4	18
c08c8205 VP	19	#define VGETCPU_RDTSCP 1
	20	#define VGETCPU_LSL 2
	21
1da177e4	22	/* kernel space (writeable) */
c08c8205	23	extern int vgetcpu_mode;
1da177e4	24	extern struct timezone sys_tz;
1da177e4	25
8c49d9a7 AL	26	#include <asm/vvar.h>
8c49d9a7 AL	27
e4026440 IM	28	extern void map_vsyscall(void);
e4026440 IM	29
3ae36655 AL	30	/*
	31	* Called on instruction fetch fault in vsyscall page.
	32	* Returns true if handled.
	33	*/
	34	extern bool emulate_vsyscall(struct pt_regs *regs, unsigned long address);
	35
1da177e4 LT	36	#endif /* __KERNEL__ */
1da177e4 LT	37
1965aae3	38	#endif /* _ASM_X86_VSYSCALL_H */