[mirror_ubuntu-artful-kernel.git] / arch / s390 / include / asm / vdso.h

#ifndef __S390_VDSO_H__
#define __S390_VDSO_H__

/* Default link addresses for the vDSOs */
#define VDSO32_LBASE	0
#define VDSO64_LBASE	0

#define VDSO_VERSION_STRING	LINUX_2.6.29

#ifndef __ASSEMBLY__

/*
 * Note about the vdso_data and vdso_per_cpu_data structures:
 *
 * NEVER USE THEM IN USERSPACE CODE DIRECTLY. The layout of the
 * structure is supposed to be known only to the function in the vdso
 * itself and may change without notice.
 */

struct vdso_data {
	__u64 tb_update_count;		/* Timebase atomicity ctr	0x00 */
	__u64 xtime_tod_stamp;		/* TOD clock for xtime		0x08 */
	__u64 xtime_clock_sec;		/* Kernel time			0x10 */
	__u64 xtime_clock_nsec;		/*				0x18 */
	__u64 xtime_coarse_sec;		/* Coarse kernel time		0x20 */
	__u64 xtime_coarse_nsec;	/*				0x28 */
	__u64 wtom_clock_sec;		/* Wall to monotonic clock	0x30 */
	__u64 wtom_clock_nsec;		/*				0x38 */
	__u64 wtom_coarse_sec;		/* Coarse wall to monotonic	0x40 */
	__u64 wtom_coarse_nsec;		/*				0x48 */
	__u32 tz_minuteswest;		/* Minutes west of Greenwich	0x50 */
	__u32 tz_dsttime;		/* Type of dst correction	0x54 */
	__u32 ectg_available;		/* ECTG instruction present	0x58 */
	__u32 tk_mult;			/* Mult. used for xtime_nsec	0x5c */
	__u32 tk_shift;			/* Shift used for xtime_nsec	0x60 */
	__u32 ts_dir;			/* TOD steering direction	0x64 */
	__u64 ts_end;			/* TOD steering end		0x68 */
};

struct vdso_per_cpu_data {
	__u64 ectg_timer_base;
	__u64 ectg_user_time;
	__u32 cpu_nr;
	__u32 node_id;
};

extern struct vdso_data *vdso_data;

int vdso_alloc_per_cpu(struct lowcore *lowcore);
void vdso_free_per_cpu(struct lowcore *lowcore);

#endif /* __ASSEMBLY__ */
#endif /* __S390_VDSO_H__ */
Commit	Line	Data
b020632e MS	1	#ifndef __S390_VDSO_H__
	2	#define __S390_VDSO_H__
	3
b020632e MS	4	/* Default link addresses for the vDSOs */
	5	#define VDSO32_LBASE 0
	6	#define VDSO64_LBASE 0
	7
13c6680a	8	#define VDSO_VERSION_STRING LINUX_2.6.29
b020632e MS	9
	10	#ifndef __ASSEMBLY__
	11
	12	/*
c742b31c	13	* Note about the vdso_data and vdso_per_cpu_data structures:
b020632e	14	*
c742b31c	15	* NEVER USE THEM IN USERSPACE CODE DIRECTLY. The layout of the
b020632e MS	16	* structure is supposed to be known only to the function in the vdso
	17	* itself and may change without notice.
	18	*/
	19
	20	struct vdso_data {
	21	__u64 tb_update_count; /* Timebase atomicity ctr 0x00 */
	22	__u64 xtime_tod_stamp; /* TOD clock for xtime 0x08 */
	23	__u64 xtime_clock_sec; /* Kernel time 0x10 */
	24	__u64 xtime_clock_nsec; /* 0x18 */
b7eacb59 MS	25	__u64 xtime_coarse_sec; /* Coarse kernel time 0x20 */
	26	__u64 xtime_coarse_nsec; /* 0x28 */
	27	__u64 wtom_clock_sec; /* Wall to monotonic clock 0x30 */
	28	__u64 wtom_clock_nsec; /* 0x38 */
	29	__u64 wtom_coarse_sec; /* Coarse wall to monotonic 0x40 */
	30	__u64 wtom_coarse_nsec; /* 0x48 */
	31	__u32 tz_minuteswest; /* Minutes west of Greenwich 0x50 */
	32	__u32 tz_dsttime; /* Type of dst correction 0x54 */
	33	__u32 ectg_available; /* ECTG instruction present 0x58 */
	34	__u32 tk_mult; /* Mult. used for xtime_nsec 0x5c */
	35	__u32 tk_shift; /* Shift used for xtime_nsec 0x60 */
75c7b6f3 MS	36	__u32 ts_dir; /* TOD steering direction 0x64 */
75c7b6f3 MS	37	__u64 ts_end; /* TOD steering end 0x68 */
c742b31c MS	38	};
	39
	40	struct vdso_per_cpu_data {
	41	__u64 ectg_timer_base;
	42	__u64 ectg_user_time;
249c543b MS	43	__u32 cpu_nr;
249c543b MS	44	__u32 node_id;
b020632e MS	45	};
	46
	47	extern struct vdso_data *vdso_data;
	48
c667aeac HC	49	int vdso_alloc_per_cpu(struct lowcore *lowcore);
c667aeac HC	50	void vdso_free_per_cpu(struct lowcore *lowcore);
c742b31c	51
b020632e	52	#endif /* __ASSEMBLY__ */
b020632e	53	#endif /* __S390_VDSO_H__ */