#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 wtom_clock_sec; /* Wall to monotonic clock 0x20 */
__u64 wtom_clock_nsec; /* 0x28 */
__u32 tz_minuteswest; /* Minutes west of Greenwich 0x30 */
__u32 tz_dsttime; /* Type of dst correction 0x34 */
__u32 ectg_available; /* ECTG instruction present 0x38 */
__u32 tk_mult; /* Mult. used for xtime_nsec 0x3c */
__u32 tk_shift; /* Shift used for xtime_nsec 0x40 */
};

struct vdso_per_cpu_data {
__u64 ectg_timer_base;
__u64 ectg_user_time;
};

extern struct vdso_data *vdso_data;

#ifdef CONFIG_64BIT
int vdso_alloc_per_cpu(struct _lowcore *lowcore);
void vdso_free_per_cpu(struct _lowcore *lowcore);
#endif

#endif /* __ASSEMBLY__ */
#endif /* __S390_VDSO_H__ */