OvmfPkg: Change OPTIONAL keyword usage style

[mirror_edk2.git] / OvmfPkg / Library / AcpiTimerLib / AcpiTimerLib.c

diff --git a/OvmfPkg/Library/AcpiTimerLib/AcpiTimerLib.c b/OvmfPkg/Library/AcpiTimerLib/AcpiTimerLib.c
index 248eb9285a1764741e580c8c925c592f4527edd6..3d73111ced9a1e3b74138ce4fc1428356248746a 100644 (file)
--- a/OvmfPkg/Library/AcpiTimerLib/AcpiTimerLib.c
+++ b/OvmfPkg/Library/AcpiTimerLib/AcpiTimerLib.c
@@ -1,89 +1,23 @@
 /** @file\r
   ACPI Timer implements one instance of Timer Library.\r
 \r
-  Copyright (c) 2008 - 2011, Intel Corporation. All rights reserved.<BR>\r
+  Copyright (c) 2008 - 2012, Intel Corporation. All rights reserved.<BR>\r
   Copyright (c) 2011, Andrei Warkentin <andreiw@motorola.com>\r
 \r
-  This program and the accompanying materials are\r
-  licensed and made available under the terms and conditions of the BSD License\r
-  which accompanies this distribution.  The full text of the license may be found at\r
-  http://opensource.org/licenses/bsd-license.php\r
-  \r
-  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
-  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+  SPDX-License-Identifier: BSD-2-Clause-Patent\r
 \r
-**/ \r
+**/\r
 \r
-#include <Base.h>\r
-#include <Library/TimerLib.h>\r
-#include <Library/BaseLib.h>\r
-#include <Library/IoLib.h>\r
-#include <Library/PciLib.h>\r
 #include <Library/DebugLib.h>\r
+#include <Library/BaseLib.h>\r
+#include <IndustryStandard/Acpi.h>\r
+\r
+#include "AcpiTimerLib.h"\r
 \r
 //\r
-// PIIX4 Power Management Base Address\r
+// The ACPI Time is a 24-bit counter\r
 //\r
-UINT32 mPmba = 0xb000;\r
-\r
-#define PCI_BAR_IO             0x1\r
-#define ACPI_TIMER_FREQUENCY   3579545\r
-#define ACPI_TIMER_COUNT_SIZE  0x01000000\r
-#define ACPI_TIMER_OFFSET      0x8\r
-\r
-/**\r
-  The constructor function enables ACPI IO space.\r
-\r
-  If ACPI I/O space not enabled, this function will enable it.\r
-  It will always return RETURN_SUCCESS.\r
-\r
-  @retval EFI_SUCCESS   The constructor always returns RETURN_SUCCESS.\r
-\r
-**/\r
-RETURN_STATUS\r
-EFIAPI\r
-AcpiTimerLibConstructor (\r
-  VOID\r
-  )\r
-{\r
-  UINT8 Device;\r
-\r
-  Device = 1;\r
-  // Device = 7;\r
-\r
-  if (PciRead8 (PCI_LIB_ADDRESS (0,Device,3,0x80)) & 1) {\r
-    mPmba = PciRead32 (PCI_LIB_ADDRESS (0,Device,3,0x40));\r
-    ASSERT (mPmba & PCI_BAR_IO);\r
-    mPmba &= ~PCI_BAR_IO;\r
-  } else {\r
-    PciAndThenOr32 (PCI_LIB_ADDRESS (0,Device,3,0x40),\r
-                    (UINT32) ~0xfc0, mPmba);\r
-    PciOr8         (PCI_LIB_ADDRESS (0,Device,3,0x04), 0x01);\r
-  }\r
-\r
-  //\r
-  // ACPI Timer enable is in Bus 0, Device ?, Function 3\r
-  //\r
-  PciOr8         (PCI_LIB_ADDRESS (0,Device,3,0x80), 0x01);\r
-  return RETURN_SUCCESS;\r
-}\r
-\r
-/**\r
-  Internal function to read the current tick counter of ACPI.\r
-\r
-  Internal function to read the current tick counter of ACPI.\r
-\r
-  @return The tick counter read.\r
-\r
-**/\r
-STATIC\r
-UINT32\r
-InternalAcpiGetTimerTick (\r
-  VOID\r
-  )\r
-{\r
-  return IoRead32 (mPmba + ACPI_TIMER_OFFSET);\r
-}\r
+#define ACPI_TIMER_COUNT_SIZE  BIT24\r
 \r
 /**\r
   Stalls the CPU for at least the given number of ticks.\r
@@ -94,7 +28,6 @@ InternalAcpiGetTimerTick (
   @param  Delay     A period of time to delay in ticks.\r
 \r
 **/\r
-STATIC\r
 VOID\r
 InternalAcpiDelay (\r
   IN      UINT32                    Delay\r
@@ -225,7 +158,7 @@ GetPerformanceCounter (
 UINT64\r
 EFIAPI\r
 GetPerformanceCounterProperties (\r
-  OUT      UINT64                    *StartValue,  OPTIONAL\r
+  OUT      UINT64                    *StartValue   OPTIONAL,\r
   OUT      UINT64                    *EndValue     OPTIONAL\r
   )\r
 {\r