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/** @file
Copyright (c) 2011 - 2014, ARM Ltd. All rights reserved.<BR>
Copyright (c) 2014 - 2018, Linaro Ltd. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Library/ArmGenericTimerCounterLib.h>
#include <Library/ArmLib.h>
VOID
EFIAPI
ArmGenericTimerEnableTimer (
VOID
)
{
UINTN TimerCtrlReg;
TimerCtrlReg = ArmReadCntvCtl ();
TimerCtrlReg |= ARM_ARCH_TIMER_ENABLE;
ArmWriteCntvCtl (TimerCtrlReg);
}
VOID
EFIAPI
ArmGenericTimerReenableTimer (
VOID
)
{
UINTN TimerCtrlReg;
TimerCtrlReg = ArmReadCntvCtl ();
TimerCtrlReg |= ARM_ARCH_TIMER_ENABLE;
//
// When running under Xen, we need to unmask the interrupt on the timer side
// as Xen will mask it when servicing the interrupt at the hypervisor level
// and delivering the virtual timer interrupt to the guest. Otherwise, the
// interrupt will fire again, trapping into the hypervisor again, etc. etc.
//
TimerCtrlReg &= ~ARM_ARCH_TIMER_IMASK;
ArmWriteCntvCtl (TimerCtrlReg);
}
VOID
EFIAPI
ArmGenericTimerDisableTimer (
VOID
)
{
UINTN TimerCtrlReg;
TimerCtrlReg = ArmReadCntvCtl ();
TimerCtrlReg &= ~ARM_ARCH_TIMER_ENABLE;
ArmWriteCntvCtl (TimerCtrlReg);
}
VOID
EFIAPI
ArmGenericTimerSetTimerFreq (
IN UINTN FreqInHz
)
{
ArmWriteCntFrq (FreqInHz);
}
UINTN
EFIAPI
ArmGenericTimerGetTimerFreq (
VOID
)
{
return ArmReadCntFrq ();
}
UINTN
EFIAPI
ArmGenericTimerGetTimerVal (
VOID
)
{
return ArmReadCntvTval ();
}
VOID
EFIAPI
ArmGenericTimerSetTimerVal (
IN UINTN Value
)
{
ArmWriteCntvTval (Value);
}
UINT64
EFIAPI
ArmGenericTimerGetSystemCount (
VOID
)
{
return ArmReadCntvCt ();
}
UINTN
EFIAPI
ArmGenericTimerGetTimerCtrlReg (
VOID
)
{
return ArmReadCntvCtl ();
}
VOID
EFIAPI
ArmGenericTimerSetTimerCtrlReg (
UINTN Value
)
{
ArmWriteCntvCtl (Value);
}
UINT64
EFIAPI
ArmGenericTimerGetCompareVal (
VOID
)
{
return ArmReadCntvCval ();
}
VOID
EFIAPI
ArmGenericTimerSetCompareVal (
IN UINT64 Value
)
{
ArmWriteCntvCval (Value);
}
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