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| author | Gabriel Somlo <somlo@cmu.edu> | 2014-11-14 00:38:17 +0000 |
|---|---|---|
| committer | jljusten <jljusten@Edk2> | 2014-11-14 00:38:17 +0000 |
| commit | 170ef2d91612350fd1d1bac9d77b3ce0bffda714 (patch) | |
| tree | fa1e67115eefa994c76501526e67940dabc18f97 /OvmfPkg/Library/AcpiTimerLib/AcpiTimerLib.h | |
| parent | 72a1100171a627ce26789c193ca7036eb8a5364a (diff) | |
| download | edk2-platforms-170ef2d91612350fd1d1bac9d77b3ce0bffda714.tar.xz | |
OvmfPkg: AcpiTimerLib: Split into multiple phase-specific instances
Remove local power management register access macros in favor of
factored-out ones in OvmfPkg/Include/OvmfPlatforms.h
Next, AcpiTimerLib is split out into three instances, for use during
various stages:
- BaseRom: used during SEC, PEI_CORE, and PEIM;
- Dxe: used during DXE_DRIVER and DXE_RUNTIME_DRIVER;
- Base: used by default during all other stages.
Most of the code remains in AcpiTimerLib.c, to be shared by all
instances. The two platform-dependent methods (constructor and
InternalAcpiGetTimerTick) are provided separately by source files
specific to each instance, namely [BaseRom|Base|Dxe]AcpiTimerLib.c.
Since pre-DXE stages can't rely on storing data in global variables,
methods specific to the "BaseRom" instance will call platform
detection macros each time they're invoked.
The "Base" instance calls platform detection macros only from its
constructor, and caches the address required by InternalAcpiTimerTick
in a global variable.
The "Dxe" instance is very similar to "Base", except no platform
detection macros are called at all; instead, the platform type is
read via a dynamic PCD set from PlatformPei.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Gabriel Somlo <somlo@cmu.edu>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16376 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'OvmfPkg/Library/AcpiTimerLib/AcpiTimerLib.h')
| -rw-r--r-- | OvmfPkg/Library/AcpiTimerLib/AcpiTimerLib.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/OvmfPkg/Library/AcpiTimerLib/AcpiTimerLib.h b/OvmfPkg/Library/AcpiTimerLib/AcpiTimerLib.h new file mode 100644 index 0000000000..475da70ac8 --- /dev/null +++ b/OvmfPkg/Library/AcpiTimerLib/AcpiTimerLib.h @@ -0,0 +1,29 @@ +/** @file
+ Internal definitions for ACPI Timer Library
+
+ Copyright (C) 2014, Gabriel L. Somlo <somlo@cmu.edu>
+
+ 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.
+**/
+
+#ifndef _ACPI_TIMER_LIB_INTERNAL_H_
+#define _ACPI_TIMER_LIB_INTERNAL_H_
+
+/**
+ Internal function to read the current tick counter of ACPI.
+
+ @return The tick counter read.
+
+**/
+UINT32
+InternalAcpiGetTimerTick (
+ VOID
+ );
+
+#endif // _ACPI_TIMER_LIB_INTERNAL_H_
|