/*
* Stop hardware timer and read time elapsed since last start.
*
* returns
* The elapsed time since last start in units of 16us.
*
*/
SK_U32 SkHwtRead(
SK_AC *pAC, /* Adapters context */
SK_IOC Ioc) /* IoContext */
{
SK_U32 TRead;
SK_U32 IStatus;
if (pAC->Hwt.TActive) {
SkHwtStop(pAC, Ioc);
SK_IN32(Ioc, B2_TI_VAL, &TRead);
TRead /= SK_HWT_FAC;
SK_IN32(Ioc, B0_ISRC, &IStatus);
/* Check if timer expired (or wraped around) */
if ((TRead > pAC->Hwt.TStart) || (IStatus & IS_TIMINT)) {
SkHwtStop(pAC, Ioc);
pAC->Hwt.TStop = pAC->Hwt.TStart;
}
else {
pAC->Hwt.TStop = pAC->Hwt.TStart - TRead;
}
}
return(pAC->Hwt.TStop);
}
/*
* Stop hardware timer and read time elapsed since last start.
*
* returns
* The elapsed time since last start in units of 1 us.
*
*/
SK_U32 SkHwtRead(
SK_AC *pAC, /* Adapter Context */
SK_IOC IoC) /* I/O Context */
{
SK_U32 TRead;
SK_U32 IStatus;
SK_U32 TimerInt;
TimerInt = CHIP_ID_YUKON_2(pAC) ? Y2_IS_TIMINT : IS_TIMINT;
if (pAC->Hwt.TActive) {
SkHwtStop(pAC, IoC);
SK_IN32(IoC, B2_TI_VAL, &TRead);
TRead /= SK_HWT_FAC;
SK_IN32(IoC, B0_ISRC, &IStatus);
/* Check if timer expired (or wrapped around) */
if ((TRead > pAC->Hwt.TStart) || ((IStatus & TimerInt) != 0)) {
SkHwtStop(pAC, IoC);
pAC->Hwt.TStop = pAC->Hwt.TStart;
}
else {
pAC->Hwt.TStop = pAC->Hwt.TStart - TRead;
}
}
return(pAC->Hwt.TStop);
}
/*
* Stops a high level timer
* - If a timer is not in the queue the function returns normally, too.
*/
void SkTimerStop(
SK_AC *pAC, /* Adapters context */
SK_IOC Ioc, /* IoContext */
SK_TIMER *pTimer) /* Timer Pointer to be started */
{
SK_TIMER **ppTimPrev ;
SK_TIMER *pTm ;
/*
* remove timer from queue
*/
pTimer->TmActive = SK_FALSE ;
if (pAC->Tim.StQueue == pTimer && !pTimer->TmNext) {
SkHwtStop(pAC,Ioc) ;
}
for (ppTimPrev = &pAC->Tim.StQueue ; (pTm = *ppTimPrev) ;
ppTimPrev = &pTm->TmNext ) {
if (pTm == pTimer) {
/*
* Timer found in queue
* - dequeue it and
* - correct delta of the next timer
*/
*ppTimPrev = pTm->TmNext ;
if (pTm->TmNext) {
/* correct delta of next timer in queue */
pTm->TmNext->TmDelta += pTm->TmDelta ;
}
return ;
}
}
}
/*
* interrupt source= timer
*/
void SkHwtIsr(
SK_AC *pAC, /* Adapters context */
SK_IOC Ioc) /* IoContext */
{
SkHwtStop(pAC,Ioc);
pAC->Hwt.TStop = pAC->Hwt.TStart;
SkTimerDone(pAC,Ioc) ;
}
/*
* Initialize hardware timer.
*
* Must be called during init level 1.
*/
void SkHwtInit(
SK_AC *pAC, /* Adapters context */
SK_IOC Ioc) /* IoContext */
{
pAC->Hwt.TStart = 0 ;
pAC->Hwt.TStop = 0 ;
pAC->Hwt.TActive = SK_FALSE;
SkHwtStop(pAC, Ioc);
}
