/**
* 32-bit write to a HPET timer register.
*
* @returns Strict VBox status code.
*
* @param pThis The HPET state.
* @param idxReg The register being written to.
* @param u32NewValue The value being written.
*
* @remarks The caller should not hold the device lock, unless it also holds
* the TM lock.
*/
static int hpetTimerRegWrite32(HpetState *pThis, uint32_t iTimerNo, uint32_t iTimerReg, uint32_t u32NewValue)
{
Assert(!PDMCritSectIsOwner(&pThis->csLock) || TMTimerIsLockOwner(pThis->aTimers[0].CTX_SUFF(pTimer)));
if ( iTimerNo >= RT_ELEMENTS(pThis->aTimers) /* parfait */
|| iTimerNo >= HPET_CAP_GET_TIMERS(pThis->u32Capabilities))
{
static unsigned s_cOccurences = 0;
if (s_cOccurences++ < 10)
LogRel(("HPET: using timer above configured range: %d\n", iTimerNo));
return VINF_SUCCESS;
}
HpetTimer *pHpetTimer = &pThis->aTimers[iTimerNo];
switch (iTimerReg)
{
case HPET_TN_CFG:
{
DEVHPET_LOCK_RETURN(pThis, VINF_IOM_R3_MMIO_WRITE);
Log(("write HPET_TN_CFG: %d: %x\n", iTimerNo, u32NewValue));
uint64_t const iOldValue = (uint32_t)pHpetTimer->u64Config;
uint64_t u64Mask = HPET_TN_CFG_WRITE_MASK;
if (pHpetTimer->u64Config & HPET_TN_PERIODIC_CAP)
u64Mask |= HPET_TN_PERIODIC;
if (pHpetTimer->u64Config & HPET_TN_SIZE_CAP)
u64Mask |= HPET_TN_32BIT;
else
u32NewValue &= ~HPET_TN_32BIT;
if (u32NewValue & HPET_TN_32BIT)
{
Log(("setting timer %d to 32-bit mode\n", iTimerNo));
pHpetTimer->u64Cmp = (uint32_t)pHpetTimer->u64Cmp;
pHpetTimer->u64Period = (uint32_t)pHpetTimer->u64Period;
}
if ((u32NewValue & HPET_TN_INT_TYPE) == HPET_TIMER_TYPE_LEVEL)
{
static unsigned s_cOccurences = 0;
if (s_cOccurences++ < 10)
LogRel(("level-triggered config not yet supported\n"));
AssertFailed();
}
/* We only care about lower 32-bits so far */
pHpetTimer->u64Config = hpetUpdateMasked(u32NewValue, iOldValue, u64Mask);
DEVHPET_UNLOCK(pThis);
break;
}
case HPET_TN_CFG + 4: /* Interrupt capabilities */
{
Log(("write HPET_TN_CFG + 4, useless\n"));
break;
}
case HPET_TN_CMP: /* lower bits of comparator register */
{
DEVHPET_LOCK_BOTH_RETURN(pThis, VINF_IOM_R3_MMIO_WRITE);
Log(("write HPET_TN_CMP on %d: %#x\n", iTimerNo, u32NewValue));
if (pHpetTimer->u64Config & HPET_TN_PERIODIC)
{
u32NewValue &= hpetInvalidValue(pHpetTimer) >> 1; /** @todo check this in the docs and add a not why? */
pHpetTimer->u64Period = RT_MAKE_U64(u32NewValue, pHpetTimer->u64Period);
}
pHpetTimer->u64Cmp = RT_MAKE_U64(u32NewValue, pHpetTimer->u64Cmp);
pHpetTimer->u64Config &= ~HPET_TN_SETVAL;
Log2(("after HPET_TN_CMP cmp=%#llx per=%#llx\n", pHpetTimer->u64Cmp, pHpetTimer->u64Period));
if (pThis->u64HpetConfig & HPET_CFG_ENABLE)
hpetProgramTimer(pHpetTimer);
DEVHPET_UNLOCK_BOTH(pThis);
break;
}
case HPET_TN_CMP + 4: /* upper bits of comparator register */
{
DEVHPET_LOCK_BOTH_RETURN(pThis, VINF_IOM_R3_MMIO_WRITE);
Log(("write HPET_TN_CMP + 4 on %d: %#x\n", iTimerNo, u32NewValue));
if (!hpet32bitTimer(pHpetTimer))
{
if (pHpetTimer->u64Config & HPET_TN_PERIODIC)
pHpetTimer->u64Period = RT_MAKE_U64(pHpetTimer->u64Period, u32NewValue);
pHpetTimer->u64Cmp = RT_MAKE_U64(pHpetTimer->u64Cmp, u32NewValue);
Log2(("after HPET_TN_CMP+4 cmp=%llx per=%llx tmr=%d\n", pHpetTimer->u64Cmp, pHpetTimer->u64Period, iTimerNo));
pHpetTimer->u64Config &= ~HPET_TN_SETVAL;
if (pThis->u64HpetConfig & HPET_CFG_ENABLE)
hpetProgramTimer(pHpetTimer);
}
DEVHPET_UNLOCK_BOTH(pThis);
break;
}
case HPET_TN_ROUTE:
{
Log(("write HPET_TN_ROUTE\n"));
break;
}
case HPET_TN_ROUTE + 4:
{
Log(("write HPET_TN_ROUTE + 4\n"));
break;
}
default:
{
static unsigned s_cOccurences = 0;
if (s_cOccurences++ < 10)
LogRel(("invalid timer register write: %d\n", iTimerReg));
break;
}
}
/**
* 32-bit write to a config register.
*
* @returns Strict VBox status code.
*
* @param pThis The HPET state.
* @param idxReg The register being written to.
* @param u32NewValue The value being written.
*
* @remarks The caller should not hold the device lock, unless it also holds
* the TM lock.
*/
static int hpetConfigRegWrite32(HPET *pThis, uint32_t idxReg, uint32_t u32NewValue)
{
Assert(!PDMCritSectIsOwner(&pThis->CritSect) || TMTimerIsLockOwner(pThis->aTimers[0].CTX_SUFF(pTimer)));
int rc = VINF_SUCCESS;
switch (idxReg)
{
case HPET_ID:
case HPET_ID + 4:
{
Log(("write HPET_ID, useless\n"));
break;
}
case HPET_CFG:
{
DEVHPET_LOCK_BOTH_RETURN(pThis, VINF_IOM_R3_MMIO_WRITE);
uint32_t const iOldValue = (uint32_t)(pThis->u64HpetConfig);
Log(("write HPET_CFG: %x (old %x)\n", u32NewValue, iOldValue));
/*
* This check must be here, before actual update, as hpetLegacyMode
* may request retry in R3 - so we must keep state intact.
*/
if ( ((iOldValue ^ u32NewValue) & HPET_CFG_LEGACY)
&& pThis->pHpetHlpR3 != NIL_RTR3PTR)
{
#ifdef IN_RING3
rc = pThis->pHpetHlpR3->pfnSetLegacyMode(pThis->pDevInsR3, RT_BOOL(u32NewValue & HPET_CFG_LEGACY));
if (rc != VINF_SUCCESS)
#else
rc = VINF_IOM_R3_MMIO_WRITE;
#endif
{
DEVHPET_UNLOCK_BOTH(pThis);
break;
}
}
pThis->u64HpetConfig = hpetUpdateMasked(u32NewValue, iOldValue, HPET_CFG_WRITE_MASK);
uint32_t const cTimers = HPET_CAP_GET_TIMERS(pThis->u32Capabilities);
if (hpetBitJustSet(iOldValue, u32NewValue, HPET_CFG_ENABLE))
{
/** @todo Only get the time stamp once when reprogramming? */
/* Enable main counter and interrupt generation. */
pThis->u64HpetOffset = hpetTicksToNs(pThis, pThis->u64HpetCounter)
- TMTimerGet(pThis->aTimers[0].CTX_SUFF(pTimer));
for (uint32_t i = 0; i < cTimers; i++)
if (pThis->aTimers[i].u64Cmp != hpetInvalidValue(&pThis->aTimers[i]))
hpetProgramTimer(&pThis->aTimers[i]);
}
else if (hpetBitJustCleared(iOldValue, u32NewValue, HPET_CFG_ENABLE))
{
/* Halt main counter and disable interrupt generation. */
pThis->u64HpetCounter = hpetGetTicks(pThis);
for (uint32_t i = 0; i < cTimers; i++)
TMTimerStop(pThis->aTimers[i].CTX_SUFF(pTimer));
}
DEVHPET_UNLOCK_BOTH(pThis);
break;
}
case HPET_CFG + 4:
{
DEVHPET_LOCK_RETURN(pThis, VINF_IOM_R3_MMIO_WRITE);
pThis->u64HpetConfig = hpetUpdateMasked((uint64_t)u32NewValue << 32,
pThis->u64HpetConfig,
UINT64_C(0xffffffff00000000));
Log(("write HPET_CFG + 4: %x -> %#llx\n", u32NewValue, pThis->u64HpetConfig));
DEVHPET_UNLOCK(pThis);
break;
}
case HPET_STATUS:
{
DEVHPET_LOCK_RETURN(pThis, VINF_IOM_R3_MMIO_WRITE);
/* Clear ISR for all set bits in u32NewValue, see p. 14 of the HPET spec. */
pThis->u64Isr &= ~((uint64_t)u32NewValue);
Log(("write HPET_STATUS: %x -> ISR=%#llx\n", u32NewValue, pThis->u64Isr));
DEVHPET_UNLOCK(pThis);
break;
}
case HPET_STATUS + 4:
{
Log(("write HPET_STATUS + 4: %x\n", u32NewValue));
if (u32NewValue != 0)
{
static unsigned s_cOccurrences = 0;
if (s_cOccurrences++ < 10)
LogRel(("Writing HPET_STATUS + 4 with non-zero, ignored\n"));
}
break;
}
case HPET_COUNTER:
{
DEVHPET_LOCK_RETURN(pThis, VINF_IOM_R3_MMIO_WRITE);
pThis->u64HpetCounter = RT_MAKE_U64(u32NewValue, RT_HI_U32(pThis->u64HpetCounter));
Log(("write HPET_COUNTER: %#x -> %llx\n", u32NewValue, pThis->u64HpetCounter));
DEVHPET_UNLOCK(pThis);
break;
}
case HPET_COUNTER + 4:
{
DEVHPET_LOCK_RETURN(pThis, VINF_IOM_R3_MMIO_WRITE);
pThis->u64HpetCounter = RT_MAKE_U64(RT_LO_U32(pThis->u64HpetCounter), u32NewValue);
Log(("write HPET_COUNTER + 4: %#x -> %llx\n", u32NewValue, pThis->u64HpetCounter));
DEVHPET_UNLOCK(pThis);
break;
}
default:
{
static unsigned s_cOccurences = 0;
if (s_cOccurences++ < 10)
LogRel(("invalid HPET config write: %x\n", idxReg));
break;
}
}
return rc;
}
