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UefiCpuPkg/CpuTimerDxeRiscV64: Use DT based timer frequency in Timer driver

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There is GetPerformanceCounterProperties() that relies
on Device Tree to fetch timer frequency and removes the
dependency from the PCDs, use that instead.

Signed-off-by: Akshay Behl <cap2k4@rivosinc.com>

Co-authored-by: Dhaval Sharma <dhaval@rivosinc.com>
This commit is contained in:
Akshay Behl
2025-06-08 23:09:04 +05:30
committed by mergify[bot]
parent 484930e0c6
commit 34d609402b
2 changed files with 5 additions and 4 deletions
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2
UefiCpuPkg/CpuTimerDxeRiscV64/CpuTimerDxeRiscV64.inf
View File

@ -32,6 +32,7 @@
CpuLib
UefiBootServicesTableLib
UefiDriverEntryPoint
TimerLib
[LibraryClasses.RISCV64]
RiscVSbiLib
@ -42,7 +43,6 @@
[Pcd]
gEfiMdePkgTokenSpaceGuid.PcdRiscVFeatureOverride ## CONSUMES
gUefiCpuPkgTokenSpaceGuid.PcdCpuCoreCrystalClockFrequency ## CONSUMES
[Protocols]
gEfiCpuArchProtocolGuid ## CONSUMES

7
UefiCpuPkg/CpuTimerDxeRiscV64/Timer.c
View File

@ -10,6 +10,7 @@
#include <Library/BaseLib.h>
#include <Library/BaseRiscVSbiLib.h>
#include <Library/UefiLib.h>
#include <Library/TimerLib.h>
#include "Timer.h"
//
@ -114,7 +115,7 @@ TimerInterruptHandler (
mTimerNotifyFunction (
DivU64x32 (
EFI_TIMER_PERIOD_SECONDS (PeriodStart - mLastPeriodStart),
PcdGet64 (PcdCpuCoreCrystalClockFrequency)
GetPerformanceCounterProperties (NULL, NULL)
)
);
}
@ -129,7 +130,7 @@ TimerInterruptHandler (
PeriodStart += DivU64x32 (
MultU64x32 (
mTimerPeriod,
PcdGet64 (PcdCpuCoreCrystalClockFrequency)
GetPerformanceCounterProperties (NULL, NULL)
),
1000000u
); // convert to tick
@ -232,7 +233,7 @@ TimerDriverSetTimerPeriod (
PeriodStart += DivU64x32 (
MultU64x32 (
mTimerPeriod,
PcdGet64 (PcdCpuCoreCrystalClockFrequency)
GetPerformanceCounterProperties (NULL, NULL)
),
1000000u
); // convert to tick