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/**
* @file
*
* @ingroup tms570_clocks
*
* @brief System clocks.
*/
/*
* Copyright (c) 2014 Pavel Pisa <pisa@cmp.felk.cvut.cz>
*
* Czech Technical University in Prague
* Zikova 1903/4
* 166 36 Praha 6
* Czech Republic
*
* Based on LPC24xx and LPC1768 BSP
* by embedded brains GmbH and others
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#include <stdlib.h>
#include <rtems.h>
#include <bsp.h>
/**
* @brief returns the actual value of Cortex-R cycle counter register
*
* The register is incremented at each core clock period
*
* @retval x actual core clock counter value
*
*/
CPU_Counter_ticks _CPU_Counter_read(void)
{
uint32_t ticks;
asm volatile ("mrc p15, 0, %0, c9, c13, 0\n": "=r" (ticks));
return ticks;
}
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