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| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2014-09-09 16:07:43 +0000 |
|---|---|---|
| committer | oliviermartin <oliviermartin@6f19259b-4bc3-4df7-8a09-765794883524> | 2014-09-09 16:07:43 +0000 |
| commit | bcf37cf6002ba538b63172a496b142ab322eff95 (patch) | |
| tree | 4800d3cea9ae7f587e27994e924863c19bbf8e8f /ArmPkg/Library/ArmGenericTimerVirtCounterLib | |
| parent | cece12d3f60fbf6e389e28e32f04c0990676c7ac (diff) | |
| download | edk2-bcf37cf6002ba538b63172a496b142ab322eff95.tar.gz edk2-bcf37cf6002ba538b63172a496b142ab322eff95.tar.bz2 edk2-bcf37cf6002ba538b63172a496b142ab322eff95.zip | |
ArmPkg: add ArmGenericTimerCounterLib implementation using virtual timer
This adds an implementation of ArmGenericTimerCounterLib using the virtual
architected generic timer.
Contributed-under: TianoCore Contribution Agreement 1.0
Acked-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Olivier Martin <olivier.martin@arm.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16076 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'ArmPkg/Library/ArmGenericTimerVirtCounterLib')
| -rw-r--r-- | ArmPkg/Library/ArmGenericTimerVirtCounterLib/ArmGenericTimerVirtCounterLib.c | 149 | ||||
| -rw-r--r-- | ArmPkg/Library/ArmGenericTimerVirtCounterLib/ArmGenericTimerVirtCounterLib.inf | 33 |
2 files changed, 182 insertions, 0 deletions
diff --git a/ArmPkg/Library/ArmGenericTimerVirtCounterLib/ArmGenericTimerVirtCounterLib.c b/ArmPkg/Library/ArmGenericTimerVirtCounterLib/ArmGenericTimerVirtCounterLib.c new file mode 100644 index 0000000000..f99c8525b9 --- /dev/null +++ b/ArmPkg/Library/ArmGenericTimerVirtCounterLib/ArmGenericTimerVirtCounterLib.c @@ -0,0 +1,149 @@ +/** @file
+
+ Copyright (c) 2011 - 2014, ARM Ltd. All rights reserved.<BR>
+ Copyright (c) 2014, Linaro Ltd. All rights reserved.<BR>
+
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include <Library/ArmGenericTimerCounterLib.h>
+#include <Library/ArmArchTimer.h>
+
+VOID
+EFIAPI
+ArmGenericTimerEnableTimer (
+ VOID
+ )
+{
+ UINTN TimerCtrlReg;
+
+ ArmArchTimerReadReg (CntvCtl, (VOID *)&TimerCtrlReg);
+ TimerCtrlReg |= ARM_ARCH_TIMER_ENABLE;
+
+ //
+ // When running under KVM, we need to unmask the interrupt on the timer side
+ // as KVM 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.
+ // This is scheduled to be fixed on the KVM side, but there is no harm in
+ // leaving this in once KVM gets fixed.
+ //
+ TimerCtrlReg &= ~ARM_ARCH_TIMER_IMASK;
+ ArmArchTimerWriteReg (CntvCtl, (VOID *)&TimerCtrlReg);
+}
+
+VOID
+EFIAPI
+ArmGenericTimerDisableTimer (
+ VOID
+ )
+{
+ UINTN TimerCtrlReg;
+
+ ArmArchTimerReadReg (CntvCtl, (VOID *)&TimerCtrlReg);
+ TimerCtrlReg &= ~ARM_ARCH_TIMER_ENABLE;
+ ArmArchTimerWriteReg (CntvCtl, (VOID *)&TimerCtrlReg);
+}
+
+VOID
+EFIAPI
+ArmGenericTimerSetTimerFreq (
+ IN UINTN FreqInHz
+ )
+{
+ ArmArchTimerWriteReg (CntFrq, (VOID *)&FreqInHz);
+}
+
+UINTN
+EFIAPI
+ArmGenericTimerGetTimerFreq (
+ VOID
+ )
+{
+ UINTN ArchTimerFreq = 0;
+ ArmArchTimerReadReg (CntFrq, (VOID *)&ArchTimerFreq);
+ return ArchTimerFreq;
+}
+
+UINTN
+EFIAPI
+ArmGenericTimerGetTimerVal (
+ VOID
+ )
+{
+ UINTN ArchTimerValue;
+ ArmArchTimerReadReg (CntvTval, (VOID *)&ArchTimerValue);
+
+ return ArchTimerValue;
+}
+
+
+VOID
+EFIAPI
+ArmGenericTimerSetTimerVal (
+ IN UINTN Value
+ )
+{
+ ArmArchTimerWriteReg (CntvTval, (VOID *)&Value);
+}
+
+UINT64
+EFIAPI
+ArmGenericTimerGetSystemCount (
+ VOID
+ )
+{
+ UINT64 SystemCount;
+ ArmArchTimerReadReg (CntvCt, (VOID *)&SystemCount);
+
+ return SystemCount;
+}
+
+UINTN
+EFIAPI
+ArmGenericTimerGetTimerCtrlReg (
+ VOID
+ )
+{
+ UINTN Value;
+ ArmArchTimerReadReg (CntvCtl, (VOID *)&Value);
+
+ return Value;
+}
+
+VOID
+EFIAPI
+ArmGenericTimerSetTimerCtrlReg (
+ UINTN Value
+ )
+{
+ ArmArchTimerWriteReg (CntvCtl, (VOID *)&Value);
+}
+
+UINT64
+EFIAPI
+ArmGenericTimerGetCompareVal (
+ VOID
+ )
+{
+ UINT64 Value;
+ ArmArchTimerReadReg (CntvCval, (VOID *)&Value);
+
+ return Value;
+}
+
+VOID
+EFIAPI
+ArmGenericTimerSetCompareVal (
+ IN UINT64 Value
+ )
+{
+ ArmArchTimerWriteReg (CntvCval, (VOID *)&Value);
+}
diff --git a/ArmPkg/Library/ArmGenericTimerVirtCounterLib/ArmGenericTimerVirtCounterLib.inf b/ArmPkg/Library/ArmGenericTimerVirtCounterLib/ArmGenericTimerVirtCounterLib.inf new file mode 100644 index 0000000000..9267dc3434 --- /dev/null +++ b/ArmPkg/Library/ArmGenericTimerVirtCounterLib/ArmGenericTimerVirtCounterLib.inf @@ -0,0 +1,33 @@ +#/** @file
+# Implement ArmGenericTimerCounterLib using the virtual timer
+#
+# Copyright (c) 2014, Linaro Ltd. All rights reserved.<BR>
+#
+# This program and the accompanying materials
+# are licensed and made available under the terms and conditions of the BSD License
+# which accompanies this distribution. The full text of the license may be found at
+# http://opensource.org/licenses/bsd-license.php
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+#
+#**/
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = ArmGenericTimerVirtCounterLib
+ FILE_GUID = 3C0D77CC-4F27-49C8-B25C-2D01D81ED4D8
+ MODULE_TYPE = BASE
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = ArmGenericTimerCounterLib
+
+[Sources]
+ ArmGenericTimerVirtCounterLib.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+ ArmPkg/ArmPkg.dec
+
+[LibraryClasses]
+ ArmLib
+ BaseLib
|