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pxa255_TIMR.c
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pxa255_TIMR.c
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#include "pxa255_TIMR.h"
#include "mem.h"
static void pxa255timrPrvRaiseLowerInts(Pxa255timr* timr){
pxa255icInt(timr->ic, PXA255_I_TIMR0, (timr->OSSR & 1) != 0);
pxa255icInt(timr->ic, PXA255_I_TIMR1, (timr->OSSR & 2) != 0);
pxa255icInt(timr->ic, PXA255_I_TIMR2, (timr->OSSR & 4) != 0);
pxa255icInt(timr->ic, PXA255_I_TIMR3, (timr->OSSR & 8) != 0);
}
static void pxa255timrPrvCheckMatch(Pxa255timr* timr, UInt8 idx){
UInt8 v = 1UL << idx;
if((timr->OSCR == timr->OSMR[idx]) && (timr->OIER & v)){
timr->OSSR |= v;
}
}
static void pxa255timrPrvUpdate(Pxa255timr* timr){
pxa255timrPrvCheckMatch(timr, 0);
pxa255timrPrvCheckMatch(timr, 1);
pxa255timrPrvCheckMatch(timr, 2);
pxa255timrPrvCheckMatch(timr, 3);
}
static Boolean pxa255timrPrvMemAccessF(void* userData, UInt32 pa, UInt8 size, Boolean write, void* buf){
Pxa255timr* timr = userData;
UInt32 val = 0;
if(size != 4) {
err_str(__FILE__ ": Unexpected ");
// err_str(write ? "write" : "read");
// err_str(" of ");
// err_dec(size);
// err_str(" bytes to 0x");
// err_hex(pa);
// err_str("\r\n");
return true; //we do not support non-word accesses
}
pa = (pa - PXA255_TIMR_BASE) >> 2;
if(write){
val = *(UInt32*)buf;
switch(pa){
case 0:
case 1:
case 2:
case 3:
timr->OSMR[pa] = val;
break;
case 4:
timr->OSCR = val;
break;
case 5:
timr->OSSR = timr->OSSR &~ val;
pxa255timrPrvRaiseLowerInts(timr);
break;
case 6:
timr->OWER = val;
break;
case 7:
timr->OIER = val;
pxa255timrPrvUpdate(timr);
pxa255timrPrvRaiseLowerInts(timr);
break;
}
}
else{
switch(pa){
case 0:
case 1:
case 2:
case 3:
val = timr->OSMR[pa];
break;
case 4:
val = timr->OSCR;
break;
case 5:
val = timr->OSSR;
break;
case 6:
val = timr->OWER;
break;
case 7:
val = timr->OIER;
break;
}
*(UInt32*)buf = val;
}
return true;
}
Boolean pxa255timrInit(Pxa255timr* timr, ArmMem* physMem, Pxa255ic* ic){
__mem_zero(timr, sizeof(Pxa255timr));
timr->ic = ic;
return memRegionAdd(physMem, PXA255_TIMR_BASE, PXA255_TIMR_SIZE, pxa255timrPrvMemAccessF, timr);
}
void pxa255timrTick(Pxa255timr* timr){
timr->OSCR++;
pxa255timrPrvUpdate(timr);
pxa255timrPrvRaiseLowerInts(timr);
}