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/*
* This routine does the bulk of the system initialisation.
*/
/*
* Author:
* David Fiddes, D.J@fiddes.surfaid.org
* http://www.calm.hw.ac.uk/davidf/coldfire/
*
* COPYRIGHT (c) 1989-1998.
* On-Line Applications Research Corporation (OAR).
*
* 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 <bsp.h>
#include <bsp/bootcard.h>
void __attribute__((weak)) bsp_start(void)
{
}
uint32_t __attribute__((weak)) bsp_get_CPU_clock_speed(void)
{
#define DEF_CLOCK_SPEED 8000000.0F //8.0 MHz
#define MCF_MFD0_2_MASK 0x7000U
#define MCF_RFD0_2_MASK 0x0700U
#define MCF_MFD0_2_OFFSET 4U
#define SPEED_BIAS ((((MCF_CLOCK_SYNCR & MCF_MFD0_2_MASK) >> 11) + MCF_MFD0_2_OFFSET) / (float)(((MCF_CLOCK_SYNCR & MCF_RFD0_2_MASK)>>7) ? : 1.0F))
return MCF_CLOCK_SYNCR & MCF_CLOCK_SYNCR_PLLEN ? SPEED_BIAS * DEF_CLOCK_SPEED : DEF_CLOCK_SPEED;
}
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