Fixed a bug in the HardwareInterrupt handler that would blow the stack if you reenabl...

[mirror_edk2.git] / ArmPkg / Drivers / CpuDxe / CpuDxe.c

/** @file\r
\r
  Copyright (c) 2008-2009, Apple Inc. All rights reserved.\r
  \r
  All rights reserved. This program and the accompanying materials\r
  are 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
\r
**/\r
\r
#include "CpuDxe.h"\r
\r
BOOLEAN mInterruptState   = FALSE;\r
\r
EFI_STATUS\r
EFIAPI\r
CpuFlushCpuDataCache (\r
  IN EFI_CPU_ARCH_PROTOCOL           *This,\r
  IN EFI_PHYSICAL_ADDRESS            Start,\r
  IN UINT64                          Length,\r
  IN EFI_CPU_FLUSH_TYPE              FlushType\r
  )\r
{\r
  switch (FlushType) {\r
    case EfiCpuFlushTypeWriteBack:\r
      WriteBackDataCacheRange ((VOID *)(UINTN)Start, (UINTN)Length);\r
      break;\r
    case EfiCpuFlushTypeInvalidate:\r
      InvalidateDataCacheRange ((VOID *)(UINTN)Start, (UINTN)Length);\r
      break;\r
    case EfiCpuFlushTypeWriteBackInvalidate:\r
      WriteBackInvalidateDataCacheRange ((VOID *)(UINTN)Start, (UINTN)Length);\r
      break;\r
    default:\r
      return EFI_INVALID_PARAMETER;\r
  }\r
  \r
  return EFI_SUCCESS;\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
CpuEnableInterrupt (\r
  IN EFI_CPU_ARCH_PROTOCOL          *This\r
  )\r
{\r
  ArmEnableInterrupts ();\r
\r
  mInterruptState  = TRUE;\r
  return EFI_SUCCESS;\r
}\r
\r
\r
EFI_STATUS\r
EFIAPI\r
CpuDisableInterrupt (\r
  IN EFI_CPU_ARCH_PROTOCOL          *This\r
  )\r
{\r
  ArmDisableInterrupts ();\r
\r
  mInterruptState = FALSE;\r
  return EFI_SUCCESS;\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
CpuGetInterruptState (\r
  IN  EFI_CPU_ARCH_PROTOCOL         *This,\r
  OUT BOOLEAN                       *State\r
  )\r
{\r
  if (State == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  *State = mInterruptState;\r
  return EFI_SUCCESS;\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
CpuInit (\r
  IN EFI_CPU_ARCH_PROTOCOL           *This,\r
  IN EFI_CPU_INIT_TYPE               InitType\r
  )\r
{\r
  return EFI_UNSUPPORTED;\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
CpuRegisterInterruptHandler (\r
  IN EFI_CPU_ARCH_PROTOCOL          *This,\r
  IN EFI_EXCEPTION_TYPE             InterruptType,\r
  IN EFI_CPU_INTERRUPT_HANDLER      InterruptHandler\r
  )\r
{\r
  return RegisterInterruptHandler (InterruptType, InterruptHandler);\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
CpuGetTimerValue (\r
  IN  EFI_CPU_ARCH_PROTOCOL          *This,\r
  IN  UINT32                         TimerIndex,\r
  OUT UINT64                         *TimerValue,\r
  OUT UINT64                         *TimerPeriod   OPTIONAL\r
  )\r
{\r
  return EFI_UNSUPPORTED;\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
CpuSetMemoryAttributes (\r
  IN EFI_CPU_ARCH_PROTOCOL     *This,\r
  IN EFI_PHYSICAL_ADDRESS      BaseAddress,\r
  IN UINT64                    Length,\r
  IN UINT64                    Attributes\r
  )\r
{\r
  return EFI_UNSUPPORTED;\r
}\r
\r
//\r
// Globals used to initialize the protocol\r
//\r
EFI_HANDLE            mCpuHandle = NULL;\r
EFI_CPU_ARCH_PROTOCOL mCpu = {\r
  CpuFlushCpuDataCache,\r
  CpuEnableInterrupt,\r
  CpuDisableInterrupt,\r
  CpuGetInterruptState,\r
  CpuInit,\r
  CpuRegisterInterruptHandler,\r
  CpuGetTimerValue,\r
  CpuSetMemoryAttributes,\r
  0,          // NumberOfTimers\r
  4,          // DmaBufferAlignment\r
};\r
\r
EFI_STATUS\r
CpuDxeInitialize (\r
  IN EFI_HANDLE         ImageHandle,\r
  IN EFI_SYSTEM_TABLE   *SystemTable\r
  )\r
{ \r
  InitializeExceptions (&mCpu);  \r
  return gBS->InstallMultipleProtocolInterfaces (&mCpuHandle, &gEfiCpuArchProtocolGuid, &mCpu, NULL);\r
}\r
\r