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| author | Rebecca Cran <rebecca@bsdio.com> | 2020-04-29 19:12:12 -0600 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2020-04-30 13:46:11 +0000 |
| commit | 91dee771fc0da5b5a619c464c8d1fe2ee16f1fe0 (patch) | |
| tree | de6eeb018f77b35d4e0227cb57569b2c6a02fce9 /OvmfPkg/Library/AcpiTimerLib | |
| parent | 70d5086c3274b1a5b099d642d546581070374e6e (diff) | |
| download | edk2-91dee771fc0da5b5a619c464c8d1fe2ee16f1fe0.tar.gz edk2-91dee771fc0da5b5a619c464c8d1fe2ee16f1fe0.tar.bz2 edk2-91dee771fc0da5b5a619c464c8d1fe2ee16f1fe0.zip | |
OvmfPkg: Add bhyve support into AcpiTimerLib
On bhyve, the ACPI timer is located at a fixed IO address; it need
not be programmed into, nor fetched from, the PMBA -- power
management base address -- register of the PCI host bridge.
Signed-off-by: Rebecca Cran <rebecca@bsdio.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Ard Biesheuvel <ard.biesheuvel@arm.com>
Message-Id: <20200430011212.612386-1-rebecca@bsdio.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Diffstat (limited to 'OvmfPkg/Library/AcpiTimerLib')
| -rw-r--r-- | OvmfPkg/Library/AcpiTimerLib/BaseAcpiTimerLibBhyve.c | 32 | ||||
| -rw-r--r-- | OvmfPkg/Library/AcpiTimerLib/BaseAcpiTimerLibBhyve.inf | 30 |
2 files changed, 62 insertions, 0 deletions
diff --git a/OvmfPkg/Library/AcpiTimerLib/BaseAcpiTimerLibBhyve.c b/OvmfPkg/Library/AcpiTimerLib/BaseAcpiTimerLibBhyve.c new file mode 100644 index 0000000000..f927e27188 --- /dev/null +++ b/OvmfPkg/Library/AcpiTimerLib/BaseAcpiTimerLibBhyve.c @@ -0,0 +1,32 @@ +/** @file
+ Provide InternalAcpiGetTimerTick for the bhyve instance of the
+ Base ACPI Timer Library
+
+ Copyright (C) 2020, Rebecca Cran <rebecca@bsdio.com>
+ Copyright (C) 2014, Gabriel L. Somlo <somlo@cmu.edu>
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include <Library/IoLib.h>
+#include <OvmfPlatforms.h>
+
+/**
+ Internal function to read the current tick counter of ACPI.
+
+ Read the current ACPI tick counter using the counter address cached
+ by this instance's constructor.
+
+ @return The tick counter read.
+
+**/
+UINT32
+InternalAcpiGetTimerTick (
+ VOID
+ )
+{
+ //
+ // Return the current ACPI timer value.
+ //
+ return IoRead32 (BHYVE_ACPI_TIMER_IO_ADDR);
+}
diff --git a/OvmfPkg/Library/AcpiTimerLib/BaseAcpiTimerLibBhyve.inf b/OvmfPkg/Library/AcpiTimerLib/BaseAcpiTimerLibBhyve.inf new file mode 100644 index 0000000000..14b7479e67 --- /dev/null +++ b/OvmfPkg/Library/AcpiTimerLib/BaseAcpiTimerLibBhyve.inf @@ -0,0 +1,30 @@ +## @file
+# Base ACPI Timer Library Instance for Bhyve.
+#
+# Copyright (C) 2020, Rebecca Cran <rebecca@bsdio.com>
+# Copyright (C) 2014, Gabriel L. Somlo <somlo@cmu.edu>
+# Copyright (c) 2008 - 2010, Intel Corporation. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = BaseAcpiTimerLibBhyve
+ FILE_GUID = A5E3B247-7302-11EA-9C04-3CECEF0C1C08
+ MODULE_TYPE = BASE
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = TimerLib
+
+[Sources]
+ AcpiTimerLib.c
+ AcpiTimerLib.h
+ BaseAcpiTimerLibBhyve.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+ OvmfPkg/OvmfPkg.dec
+
+[LibraryClasses]
+ IoLib
|