diff options
Diffstat (limited to 'UefiCpuPkg/CpuTimerDxeRiscV64/Timer.c')
| -rw-r--r-- | UefiCpuPkg/CpuTimerDxeRiscV64/Timer.c | 26 |
1 files changed, 22 insertions, 4 deletions
diff --git a/UefiCpuPkg/CpuTimerDxeRiscV64/Timer.c b/UefiCpuPkg/CpuTimerDxeRiscV64/Timer.c index fa957ba5e3..358057e7c6 100644 --- a/UefiCpuPkg/CpuTimerDxeRiscV64/Timer.c +++ b/UefiCpuPkg/CpuTimerDxeRiscV64/Timer.c @@ -80,8 +80,15 @@ TimerInterruptHandler ( return;
}
- mLastPeriodStart = PeriodStart;
- SbiSetTimer (PeriodStart += mTimerPeriod);
+ mLastPeriodStart = PeriodStart;
+ PeriodStart += DivU64x32 (
+ MultU64x32 (
+ mTimerPeriod,
+ PcdGet64 (PcdCpuCoreCrystalClockFrequency)
+ ),
+ 1000000u
+ ); // convert to tick
+ SbiSetTimer (PeriodStart);
RiscVEnableTimerInterrupt (); // enable SMode timer int
gBS->RestoreTPL (OriginalTPL);
}
@@ -163,6 +170,8 @@ TimerDriverSetTimerPeriod ( IN UINT64 TimerPeriod
)
{
+ UINT64 PeriodStart;
+
DEBUG ((DEBUG_INFO, "TimerDriverSetTimerPeriod(0x%lx)\n", TimerPeriod));
if (TimerPeriod == 0) {
@@ -171,9 +180,18 @@ TimerDriverSetTimerPeriod ( return EFI_SUCCESS;
}
- mTimerPeriod = TimerPeriod / 10; // convert unit from 100ns to 1us
+ mTimerPeriod = TimerPeriod / 10; // convert unit from 100ns to 1us
+
mLastPeriodStart = RiscVReadTimer ();
- SbiSetTimer (mLastPeriodStart + mTimerPeriod);
+ PeriodStart = mLastPeriodStart;
+ PeriodStart += DivU64x32 (
+ MultU64x32 (
+ mTimerPeriod,
+ PcdGet64 (PcdCpuCoreCrystalClockFrequency)
+ ),
+ 1000000u
+ ); // convert to tick
+ SbiSetTimer (PeriodStart);
mCpu->EnableInterrupt (mCpu);
RiscVEnableTimerInterrupt (); // enable SMode timer int
|