mirror of https://github.com/acidanthera/audk.git
150 lines
2.9 KiB
C
150 lines
2.9 KiB
C
/** @file
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Copyright (c) 2011 - 2014, ARM Ltd. All rights reserved.<BR>
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Copyright (c) 2014, Linaro Ltd. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <Library/ArmGenericTimerCounterLib.h>
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#include <Library/ArmArchTimer.h>
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VOID
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EFIAPI
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ArmGenericTimerEnableTimer (
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VOID
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)
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{
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UINTN TimerCtrlReg;
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ArmArchTimerReadReg (CntvCtl, (VOID *)&TimerCtrlReg);
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TimerCtrlReg |= ARM_ARCH_TIMER_ENABLE;
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//
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// When running under KVM, we need to unmask the interrupt on the timer side
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// as KVM will mask it when servicing the interrupt at the hypervisor level
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// and delivering the virtual timer interrupt to the guest. Otherwise, the
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// interrupt will fire again, trapping into the hypervisor again, etc. etc.
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// This is scheduled to be fixed on the KVM side, but there is no harm in
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// leaving this in once KVM gets fixed.
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//
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TimerCtrlReg &= ~ARM_ARCH_TIMER_IMASK;
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ArmArchTimerWriteReg (CntvCtl, (VOID *)&TimerCtrlReg);
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}
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VOID
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EFIAPI
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ArmGenericTimerDisableTimer (
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VOID
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)
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{
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UINTN TimerCtrlReg;
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ArmArchTimerReadReg (CntvCtl, (VOID *)&TimerCtrlReg);
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TimerCtrlReg &= ~ARM_ARCH_TIMER_ENABLE;
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ArmArchTimerWriteReg (CntvCtl, (VOID *)&TimerCtrlReg);
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}
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VOID
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EFIAPI
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ArmGenericTimerSetTimerFreq (
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IN UINTN FreqInHz
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)
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{
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ArmArchTimerWriteReg (CntFrq, (VOID *)&FreqInHz);
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}
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UINTN
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EFIAPI
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ArmGenericTimerGetTimerFreq (
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VOID
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)
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{
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UINTN ArchTimerFreq = 0;
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ArmArchTimerReadReg (CntFrq, (VOID *)&ArchTimerFreq);
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return ArchTimerFreq;
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}
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UINTN
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EFIAPI
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ArmGenericTimerGetTimerVal (
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VOID
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)
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{
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UINTN ArchTimerValue;
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ArmArchTimerReadReg (CntvTval, (VOID *)&ArchTimerValue);
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return ArchTimerValue;
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}
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VOID
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EFIAPI
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ArmGenericTimerSetTimerVal (
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IN UINTN Value
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)
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{
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ArmArchTimerWriteReg (CntvTval, (VOID *)&Value);
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}
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UINT64
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EFIAPI
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ArmGenericTimerGetSystemCount (
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VOID
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)
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{
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UINT64 SystemCount;
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ArmArchTimerReadReg (CntvCt, (VOID *)&SystemCount);
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return SystemCount;
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}
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UINTN
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EFIAPI
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ArmGenericTimerGetTimerCtrlReg (
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VOID
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)
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{
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UINTN Value;
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ArmArchTimerReadReg (CntvCtl, (VOID *)&Value);
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return Value;
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}
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VOID
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EFIAPI
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ArmGenericTimerSetTimerCtrlReg (
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UINTN Value
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)
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{
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ArmArchTimerWriteReg (CntvCtl, (VOID *)&Value);
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}
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UINT64
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EFIAPI
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ArmGenericTimerGetCompareVal (
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VOID
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)
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{
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UINT64 Value;
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ArmArchTimerReadReg (CntvCval, (VOID *)&Value);
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return Value;
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}
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VOID
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EFIAPI
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ArmGenericTimerSetCompareVal (
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IN UINT64 Value
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)
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{
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ArmArchTimerWriteReg (CntvCval, (VOID *)&Value);
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}
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