utgard/r8p0/timestamp-arm11-cc/mali_timestamp.h

/*
 * Copyright (C) 2010-2011, 2013-2014, 2016 ARM Limited. All rights reserved.
 * 
 * This program is free software and is provided to you under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence.
 * 
 * A copy of the licence is included with the program, and can also be obtained from Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

#ifndef __MALI_TIMESTAMP_H__
#define __MALI_TIMESTAMP_H__

#include "mali_osk.h"

MALI_STATIC_INLINE _mali_osk_errcode_t _mali_timestamp_reset(void)
{
	/*
	 * reset counters and overflow flags
	 */

	u32 mask = (1 << 0) | /* enable all three counters */
		   (0 << 1) | /* reset both Count Registers to 0x0 */
		   (1 << 2) | /* reset the Cycle Counter Register to 0x0 */
		   (0 << 3) | /* 1 = Cycle Counter Register counts every 64th processor clock cycle */
		   (0 << 4) | /* Count Register 0 interrupt enable */
		   (0 << 5) | /* Count Register 1 interrupt enable */
		   (0 << 6) | /* Cycle Counter interrupt enable */
		   (0 << 8) | /* Count Register 0 overflow flag (clear or write, flag on read) */
		   (0 << 9) | /* Count Register 1 overflow flag (clear or write, flag on read) */
		   (1 << 10); /* Cycle Counter Register overflow flag (clear or write, flag on read) */

	__asm__ __volatile__("MCR    p15, 0, %0, c15, c12, 0" : : "r"(mask));

	return _MALI_OSK_ERR_OK;
}

MALI_STATIC_INLINE u64 _mali_timestamp_get(void)
{
	u32 result;

	/* this is for the clock cycles */
	__asm__ __volatile__("MRC    p15, 0, %0, c15, c12, 1" : "=r"(result));

	return (u64)result;
}

#endif /* __MALI_TIMESTAMP_H__ */