//------------------------------------------------------------------------------
//
// Function: OALTimerUpdateRescheduleTime
//
// This function is called by kernel to set next reschedule time.
//
VOID
OALTimerUpdateRescheduleTime(
DWORD timeMSec
)
{
UINT32 baseMSec, periodMSec;
INT32 delta;
// Get current system timer counter
baseMSec = CurMSec;
// How far we are from next tick
delta = (INT32)(g_oalTimerContext.match - OALTimerGetCount());
if( delta < 0 )
{
UpdatePeriod(0);
goto cleanUp;
}
// If timer interrupts occurs, or we are within 1 ms of the scheduled
// interrupt, just return - timer ISR will take care of it.
if ((baseMSec != CurMSec) || (delta < MSEC_TO_TICK(1))) goto cleanUp;
// Calculate the distance between the new time and the last timer interrupt
periodMSec = timeMSec - OEMGetTickCount();
// Trying to set reschedule time prior or equal to CurMSec - this could
// happen if a thread is on its way to sleep while preempted before
// getting into the Sleep Queue
if ((INT32)periodMSec < 0)
{
periodMSec = 0;
}
else if (periodMSec > g_oalTimerContext.maxPeriodMSec)
{
periodMSec = g_oalTimerContext.maxPeriodMSec;
}
// Now we find new period, so update timer
UpdatePeriod(periodMSec);
cleanUp:
return;
}
//------------------------------------------------------------------------------
//
// Function: OALTimerSetCompare
//
__inline VOID OALTimerSetCompare(UINT32 compare)
{
OALTimerSetReg(&g_pTimerRegs->TMAR, compare);
// We commented out the following line because it causes issues to the overall performance
// of the system. As the tick timer is clocked at 32 kHz, the TMAR register takes some
// time to update and we loose this time waiting for it. The consequence is that we spend
// more than 5% of the time in this loop where the CPU should actually be idle. Not waiting
// should not have any consequence as we never actually read its value.
//
//while ((INREG32(&g_pTimerRegs->TWPS) & GPTIMER_TWPS_TMAR) != 0);
// make sure we don't set next timer interrupt to the past
//
if (compare < OALTimerGetReg(&g_pTimerRegs->TCRR)) UpdatePeriod(1);
}
//------------------------------------------------------------------------------
//
// Function: OALTimerIntrHandler
//
// This function implement timer interrupt handler. It is called from common
// ARM interrupt handler.
//
UINT32 OALTimerIntrHandler()
{
UINT32 count;
INT32 period, delta;
UINT32 sysIntr = SYSINTR_NOP;
// allow bsp to process timer interrupt first
sysIntr = OALTickTimerIntr();
if (sysIntr != SYSINTR_NOP) return sysIntr;
// Clear interrupt
OALTimerSetReg(&g_pTimerRegs->TISR, GPTIMER_TIER_MATCH);
// How far from interrupt we are?
count = OALTimerGetCount();
delta = count - g_oalTimerContext.match;
// If delta is negative, timer fired for some reason
// To be safe, reprogram the timer for minimum delta
if (delta < 0)
{
delta = 0;
goto cleanUp;
}
#ifdef OAL_ILTIMING
if (g_oalILT.active)
{
g_oalILT.isrTime1 = delta;
}
#endif
// Find how long period was
period = count - g_oalTimerContext.base;
g_oalTimerContext.curCounts += period;
g_oalTimerContext.base += period;
// Calculate actual CurMSec
CurMSec = (UINT32) TICK_TO_MSEC(g_oalTimerContext.curCounts);
OALLED(LED_IDX_TIMER, CurMSec >> 10);
// Reschedule?
delta = dwReschedTime - CurMSec;
if (delta <= 0)
{
sysIntr = SYSINTR_RESCHED;
delta = g_oalTimerContext.maxPeriodMSec;
}
cleanUp:
// Set new period
UpdatePeriod(delta);
#ifdef OAL_ILTIMING
if (g_oalILT.active) {
if (--g_oalILT.counter == 0) {
sysIntr = SYSINTR_TIMING;
g_oalILT.counter = g_oalILT.counterSet;
g_oalILT.isrTime2 = 0;
}
}
#endif
return sysIntr;
}
//------------------------------------------------------------------------------
//
// Function: OALTimerInit
//
// General purpose timer 1 is used for system tick. It supports
// count/compare mode on 32kHz clock
//
BOOL
OALTimerInit(
UINT32 sysTickMSec,
UINT32 countsPerMSec,
UINT32 countsMargin
)
{
BOOL rc = FALSE;
UINT srcClock;
UINT32 sysIntr;
UNREFERENCED_PARAMETER(sysTickMSec);
UNREFERENCED_PARAMETER(countsPerMSec);
UNREFERENCED_PARAMETER(countsMargin);
OALMSG(1&&OAL_FUNC, (L"+OALTimerInit(%d, %d, %d)\r\n", sysTickMSec, countsPerMSec, countsMargin ));
// Initialize timer state information
g_oalTimerContext.maxPeriodMSec = dwOEMMaxIdlePeriod; // Maximum period the timer will interrupt on, in mSec
g_oalTimerContext.margin = DELTA_TIME; // Time needed to reprogram the timer interrupt
g_oalTimerContext.curCounts = 0;
g_oalTimerContext.base = 0;
g_oalTimerContext.match = 0xFFFFFFFF;
g_oalTimerContext.Posted = 0;
// Set idle conversion constant and counters
idleconv = MSEC_TO_TICK(1);
curridlehigh = 0;
curridlelow = 0;
// Use variable system tick
pOEMUpdateRescheduleTime = OALTimerUpdateRescheduleTime;
// Get virtual addresses for hardware
g_TimerDevice = BSPGetSysTimerDevice(); // OMAP_DEVICE_GPTIMER1
g_pTimerRegs = OALPAtoUA(GetAddressByDevice(g_TimerDevice));
OALMSG(1 && OAL_FUNC, (L" TimerPA: 0x%x\r\n", GetAddressByDevice(g_TimerDevice)));
OALMSG(1 && OAL_FUNC, (L" TimerUA: 0x%x\r\n", g_pTimerRegs));
// Select 32K frequency source clock
srcClock = BSPGetSysTimer32KClock(); // k32K_FCLK
//PrcmDeviceSetSourceClocks(g_TimerDevice,1,&srcClock);
// enable gptimer
EnableDeviceClocks(g_TimerDevice, TRUE);
// stop timer
OALTimerSetReg(&g_pTimerRegs->TCLR, 0);
// Soft reset GPTIMER
OALTimerSetReg(&g_pTimerRegs->TIOCP, SYSCONFIG_SOFTRESET);
// While until done
while ((OALTimerGetReg(&g_pTimerRegs->TISTAT) & GPTIMER_TISTAT_RESETDONE) == 0);
// Set smart idle
OALTimerSetReg(
&g_pTimerRegs->TIOCP,
SYSCONFIG_SMARTIDLE|SYSCONFIG_ENAWAKEUP|
SYSCONFIG_AUTOIDLE
);
// Enable posted mode
OALTimerSetReg(&g_pTimerRegs->TSICR, GPTIMER_TSICR_POSTED);
g_oalTimerContext.Posted = 1;
// Set match register to avoid unwanted interrupt
OALTimerSetReg(&g_pTimerRegs->TMAR, 0xFFFFFFFF);
// Enable match interrupt
OALTimerSetReg(&g_pTimerRegs->TIER, GPTIMER_TIER_MATCH);
// Enable match wakeup
OALTimerSetReg(&g_pTimerRegs->TWER, GPTIMER_TWER_MATCH);
// Enable timer in auto-reload and compare mode
OALTimerSetReg(&g_pTimerRegs->TCLR, GPTIMER_TCLR_CE|GPTIMER_TCLR_AR|GPTIMER_TCLR_ST);
// Wait until write is done
//while ((INREG32(&g_pTimerRegs->TWPS) & GPTIMER_TWPS_TCLR) != 0);
// Set global variable to tell interrupt module about timer used
g_oalTimerIrq = GetIrqByDevice(g_TimerDevice,NULL); // 37
// Request SYSINTR for timer IRQ, it is done to reserve it...
sysIntr = OALIntrRequestSysIntr(1, &g_oalTimerIrq, OAL_INTR_FORCE_STATIC); // 17
// Enable System Tick interrupt
if (!OEMInterruptEnable(sysIntr, NULL, 0))
{
OALMSG(OAL_ERROR, (
L"ERROR: OALTimerInit: Interrupt enable for system timer failed"
));
goto cleanUp;
}
// Initialize timer to maximum period
UpdatePeriod(g_oalTimerContext.maxPeriodMSec);
// Done
rc = TRUE;
cleanUp:
OALMSG(1 && OAL_FUNC, (L"-OALTimerInit(rc = %d)\r\n", rc));
return rc;
}
void
wxGamePanel::ResetPeriod()
{
m_period = 0;
UpdatePeriod();
}
void
wxGamePanel::DecPeriod()
{
m_period = (--m_period < 0) ? 0 : m_period;
UpdatePeriod();
}
void
wxGamePanel::IncPeriod()
{
m_period = (++m_period > 9) ? 9 : m_period;
UpdatePeriod();
}