/*
* Copyright 2012 Tilera Corporation. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, version 2.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
* NON INFRINGEMENT. See the GNU General Public License for
* more details.
*/

#ifndef __TILE_VDSO_H__
#define __TILE_VDSO_H__

#include <linux/types.h>

/*
* Note about the vdso_data structure:
*
* 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 tz_update_count; /* Timezone atomicity ctr */
__u64 tb_update_count; /* Timebase atomicity ctr */
__u64 xtime_tod_stamp; /* TOD clock for xtime */
__u64 xtime_clock_sec; /* Kernel time second */
__u64 xtime_clock_nsec; /* Kernel time nanosecond */
__u64 wtom_clock_sec; /* Wall to monotonic clock second */
__u64 wtom_clock_nsec; /* Wall to monotonic clock nanosecond */
__u32 mult; /* Cycle to nanosecond multiplier */
__u32 shift; /* Cycle to nanosecond divisor (power of two) */
__u32 tz_minuteswest; /* Minutes west of Greenwich */
__u32 tz_dsttime; /* Type of dst correction */
};

extern struct vdso_data *vdso_data;

/* __vdso_rt_sigreturn is defined with the addresses in the vdso page. */
extern void __vdso_rt_sigreturn(void);

extern int setup_vdso_pages(void);

#endif /* __TILE_VDSO_H__ */