mirror of
https://github.com/reactos/reactos.git
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149 lines
3.3 KiB
C
149 lines
3.3 KiB
C
/*
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* PROJECT: ReactOS HAL
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* LICENSE: BSD - See COPYING.ARM in the top level directory
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* FILE: hal/halarm/generic/timer.c
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* PURPOSE: Timer Routines
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* PROGRAMMERS: ReactOS Portable Systems Group
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*/
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/* INCLUDES *******************************************************************/
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#include <hal.h>
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#define NDEBUG
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#include <debug.h>
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VOID
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FASTCALL
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KeUpdateSystemTime(
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IN PKTRAP_FRAME TrapFrame,
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IN ULONG Increment,
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IN KIRQL OldIrql
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);
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/* GLOBALS ********************************************************************/
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ULONG HalpCurrentTimeIncrement, HalpNextTimeIncrement, HalpNextIntervalCount;
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/* PRIVATE FUNCTIONS **********************************************************/
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VOID
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HalpClockInterrupt(VOID)
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{
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/* Clear the interrupt */
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ASSERT(KeGetCurrentIrql() == CLOCK2_LEVEL);
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WRITE_REGISTER_ULONG(TIMER0_INT_CLEAR, 1);
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/* FIXME: Update HAL Perf counters */
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/* FIXME: Check if someone changed the clockrate */
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/* Call the kernel */
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KeUpdateSystemTime(KeGetCurrentThread()->TrapFrame,
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HalpCurrentTimeIncrement,
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CLOCK2_LEVEL);
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}
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VOID
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HalpStallInterrupt(VOID)
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{
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/* Clear the interrupt */
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WRITE_REGISTER_ULONG(TIMER0_INT_CLEAR, 1);
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}
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VOID
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HalpInitializeClock(VOID)
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{
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PKIPCR Pcr = (PKIPCR)KeGetPcr();
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ULONG ClockInterval;
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SP804_CONTROL_REGISTER ControlRegister;
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/* Setup the clock and profile interrupt */
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Pcr->InterruptRoutine[CLOCK2_LEVEL] = HalpStallInterrupt;
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/*
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* Configure the interval to 10ms
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* (INTERVAL (10ms) * TIMCLKfreq (1MHz))
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* --------------------------------------- == 10^4
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* (TIMCLKENXdiv (1) * PRESCALEdiv (1))
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*/
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ClockInterval = 0x2710;
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/* Configure the timer */
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ControlRegister.AsUlong = 0;
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ControlRegister.Wide = TRUE;
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ControlRegister.Periodic = TRUE;
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ControlRegister.Interrupt = TRUE;
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ControlRegister.Enabled = TRUE;
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/* Enable the timer */
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WRITE_REGISTER_ULONG(TIMER0_LOAD, ClockInterval);
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WRITE_REGISTER_ULONG(TIMER0_CONTROL, ControlRegister.AsUlong);
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}
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/* PUBLIC FUNCTIONS ***********************************************************/
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/*
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* @implemented
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*/
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VOID
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NTAPI
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HalCalibratePerformanceCounter(IN volatile PLONG Count,
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IN ULONGLONG NewCount)
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{
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UNIMPLEMENTED;
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while (TRUE);
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}
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/*
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* @implemented
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*/
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ULONG
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NTAPI
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HalSetTimeIncrement(IN ULONG Increment)
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{
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UNIMPLEMENTED;
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while (TRUE);
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return Increment;
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}
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/*
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* @implemented
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*/
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VOID
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NTAPI
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KeStallExecutionProcessor(IN ULONG Microseconds)
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{
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SP804_CONTROL_REGISTER ControlRegister;
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/* Enable the timer */
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WRITE_REGISTER_ULONG(TIMER1_LOAD, Microseconds);
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/* Configure the timer */
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ControlRegister.AsUlong = 0;
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ControlRegister.OneShot = TRUE;
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ControlRegister.Wide = TRUE;
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ControlRegister.Periodic = TRUE;
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ControlRegister.Enabled = TRUE;
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WRITE_REGISTER_ULONG(TIMER1_CONTROL, ControlRegister.AsUlong);
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/* Now we will loop until the timer reached 0 */
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while (READ_REGISTER_ULONG(TIMER1_VALUE));
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}
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/*
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* @implemented
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*/
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LARGE_INTEGER
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NTAPI
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KeQueryPerformanceCounter(IN PLARGE_INTEGER PerformanceFreq)
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{
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LARGE_INTEGER Value;
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UNIMPLEMENTED;
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while (TRUE);
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Value.QuadPart = 0;
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return Value;
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}
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/* EOF */
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