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/*
* By Yang Xi <hiyangxi@gmail.com>.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*/
#include <rtems.h>
#include <bsp.h>
#include <pxa255.h>
unsigned int xscale_read_pmc(int reg)
{
unsigned int val = 0;
switch(reg){
case PMC_PMNC:
__asm__ volatile("mrc p14,0,%0,c0,c1,0\n":"=r"(val):);
break;
case PMC_CCNT:
__asm__ volatile("mrc p14,0,%0,c1,c1,0\n":"=r"(val):);
break;
case PMC_INTEN:
__asm__ volatile("mrc p14,0,%0,c4,c1,0\n":"=r"(val):);
break;
case PMC_FLAG:
__asm__ volatile("mrc p14,0,%0,c5,c1,0\n":"=r"(val):);
break;
case PMC_EVTSEL:
__asm__ volatile("mrc p14,0,%0,c8,c1,0\n":"=r"(val):);
break;
case PMC_PMN0:
__asm__ volatile("mrc p14,0,%0,c0,c2,0\n":"=r"(val):);
break;
case PMC_PMN1:
__asm__ volatile("mrc p14,0,%0,c1,c2,0\n":"=r"(val):);
break;
case PMC_PMN2:
__asm__ volatile("mrc p14,0,%0,c2,c2,0\n":"=r"(val):);
break;
case PMC_PMN3:
__asm__ volatile("mrc p14,0,%0,c3,c2,0\n":"=r"(val):);
break;
default:
val = 0;
break;
}
return val;
}
void xscale_write_pmc(int reg, unsigned int val)
{
switch(reg){
case PMC_PMNC:
__asm__ volatile("mcr p14,0,%0,c0,c1,0\n"::"r"(val));
break;
case PMC_CCNT:
__asm__ volatile("mcr p14,0,%0,c1,c1,0\n"::"r"(val));
break;
case PMC_INTEN:
__asm__ volatile("mcr p14,0,%0,c4,c1,0\n"::"r"(val));
break;
case PMC_FLAG:
__asm__ volatile("mcr p14,0,%0,c5,c1,0\n"::"r"(val));
break;
case PMC_EVTSEL:
__asm__ volatile("mcr p14,0,%0,c8,c1,0\n"::"r"(val));
break;
case PMC_PMN0:
__asm__ volatile("mcr p14,0,%0,c0,c2,0\n"::"r"(val));
break;
case PMC_PMN1:
__asm__ volatile("mcr p14,0,%0,c1,c2,0\n"::"r"(val));
break;
case PMC_PMN2:
__asm__ volatile("mcr p14,0,%0,c2,c2,0\n"::"r"(val));
break;
case PMC_PMN3:
__asm__ volatile("mcr p14,0,%0,c3,c2,0\n"::"r"(val));
break;
default:
break;
}
}
void xscale_pmc_enable_pmc(void)
{
unsigned int val;
val = xscale_read_pmc(PMC_PMNC);
val = (val | PMC_PMNC_E)&(~PMC_PMNC_PCD);
xscale_write_pmc(PMC_PMNC,val);
}
void xscale_pmc_disable_pmc(void)
{
unsigned int val;
val = xscale_read_pmc(PMC_PMNC);
val = val & (~PMC_PMNC_E);
xscale_write_pmc(PMC_PMNC,val);
}
void xscale_pmc_reset_pmc(void)
{
unsigned int val;
val = xscale_read_pmc(PMC_PMNC);
val = val | PMC_PMNC_PCR;
xscale_write_pmc(PMC_PMNC,val);
}
void xscale_pmc_reset_ccnt(void)
{
unsigned int val;
val = xscale_read_pmc(PMC_PMNC);
val = val | PMC_PMNC_CCR;
xscale_write_pmc(PMC_PMNC,val);
}
void xscale_pmc_setevent(int reg, unsigned char evt)
{
unsigned int val;
val = xscale_read_pmc(PMC_EVTSEL);
if((reg >= PMC_PMN0) && (reg <= PMC_PMN3)){
val &= ~(0xff<<(reg-PMC_PMN0)*8);
val |= evt << (reg-PMC_PMN0)*8;
xscale_write_pmc(PMC_EVTSEL,val);
}
}
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