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/*

* Copyright (C) 2012 ARM Ltd.

*

* This program is free software; you can redistribute it and/or modify

* it under the terms of the GNU General Public License version 2 as

* published by the Free Software Foundation.

*

* 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. See the

* GNU General Public License for more details.

*

* You should have received a copy of the GNU General Public License

* along with this program. If not, see <http://www.gnu.org/licenses/>.

*/

#ifndef __CLKSOURCE_ARM_ARCH_TIMER_H

#define __CLKSOURCE_ARM_ARCH_TIMER_H

#include <linux/timecounter.h>

#include <linux/types.h>

#define ARCH_TIMER_CTRL_ENABLE (1 << 0)

#define ARCH_TIMER_CTRL_IT_MASK (1 << 1)

#define ARCH_TIMER_CTRL_IT_STAT (1 << 2)

enum arch_timer_reg {

ARCH_TIMER_REG_CTRL,

ARCH_TIMER_REG_TVAL,

};

#define ARCH_TIMER_PHYS_ACCESS 0

#define ARCH_TIMER_VIRT_ACCESS 1

#define ARCH_TIMER_MEM_PHYS_ACCESS 2

#define ARCH_TIMER_MEM_VIRT_ACCESS 3

#define ARCH_TIMER_USR_PCT_ACCESS_EN (1 << 0) /* physical counter */

#define ARCH_TIMER_USR_VCT_ACCESS_EN (1 << 1) /* virtual counter */

#define ARCH_TIMER_VIRT_EVT_EN (1 << 2)

#define ARCH_TIMER_EVT_TRIGGER_SHIFT (4)

#define ARCH_TIMER_EVT_TRIGGER_MASK (0xF << ARCH_TIMER_EVT_TRIGGER_SHIFT)

#define ARCH_TIMER_USR_VT_ACCESS_EN (1 << 8) /* virtual timer registers */

#define ARCH_TIMER_USR_PT_ACCESS_EN (1 << 9) /* physical timer registers */

#define ARCH_TIMER_EVT_STREAM_FREQ 10000 /* 100us */

#ifdef CONFIG_ARM_ARCH_TIMER

extern u32 arch_timer_get_rate(void);

extern u64 (*arch_timer_read_counter)(void);

extern struct timecounter *arch_timer_get_timecounter(void);

#else

static inline u32 arch_timer_get_rate(void)

{

return 0;

}

static inline u64 arch_timer_read_counter(void)

{

return 0;

}

static inline struct timecounter *arch_timer_get_timecounter(void)

{

return NULL;

}

#endif

#endif