CpuDxe.c

Go to the documentation of this file.

 
#include "CpuDxe.h"
 
#include <Guid/IdleLoopEvent.h>
 
BOOLEAN  mIsFlushingGCD;
 
EFI_STATUS
EFIAPI
CpuFlushCpuDataCache (
  IN EFI_CPU_ARCH_PROTOCOL  *This,
  IN EFI_PHYSICAL_ADDRESS   Start,
  IN UINT64                 Length,
  IN EFI_CPU_FLUSH_TYPE     FlushType
  )
{
  switch (FlushType) {
    case EfiCpuFlushTypeWriteBack:
      WriteBackDataCacheRange ((VOID *)(UINTN)Start, (UINTN)Length);
      break;
    case EfiCpuFlushTypeInvalidate:
      InvalidateDataCacheRange ((VOID *)(UINTN)Start, (UINTN)Length);
      break;
    case EfiCpuFlushTypeWriteBackInvalidate:
      WriteBackInvalidateDataCacheRange ((VOID *)(UINTN)Start, (UINTN)Length);
      break;
    default:
      return EFI_INVALID_PARAMETER;
  }
 
  return EFI_SUCCESS;
}
 
EFI_STATUS
EFIAPI
CpuEnableInterrupt (
  IN EFI_CPU_ARCH_PROTOCOL  *This
  )
{
  ArmEnableInterrupts ();
 
  return EFI_SUCCESS;
}
 
EFI_STATUS
EFIAPI
CpuDisableInterrupt (
  IN EFI_CPU_ARCH_PROTOCOL  *This
  )
{
  ArmDisableInterrupts ();
 
  return EFI_SUCCESS;
}
 
EFI_STATUS
EFIAPI
CpuGetInterruptState (
  IN  EFI_CPU_ARCH_PROTOCOL  *This,
  OUT BOOLEAN                *State
  )
{
  if (State == NULL) {
    return EFI_INVALID_PARAMETER;
  }
 
  *State = ArmGetInterruptState ();
  return EFI_SUCCESS;
}
 
EFI_STATUS
EFIAPI
CpuInit (
  IN EFI_CPU_ARCH_PROTOCOL  *This,
  IN EFI_CPU_INIT_TYPE      InitType
  )
{
  return EFI_UNSUPPORTED;
}
 
EFI_STATUS
EFIAPI
CpuRegisterInterruptHandler (
  IN EFI_CPU_ARCH_PROTOCOL      *This,
  IN EFI_EXCEPTION_TYPE         InterruptType,
  IN EFI_CPU_INTERRUPT_HANDLER  InterruptHandler
  )
{
  return RegisterInterruptHandler (InterruptType, InterruptHandler);
}
 
EFI_STATUS
EFIAPI
CpuGetTimerValue (
  IN  EFI_CPU_ARCH_PROTOCOL  *This,
  IN  UINT32                 TimerIndex,
  OUT UINT64                 *TimerValue,
  OUT UINT64                 *TimerPeriod   OPTIONAL
  )
{
  return EFI_UNSUPPORTED;
}
 
VOID
EFIAPI
IdleLoopEventCallback (
  IN EFI_EVENT  Event,
  IN VOID       *Context
  )
{
  CpuSleep ();
}
 
//
// Globals used to initialize the protocol
//
EFI_HANDLE             mCpuHandle = NULL;
EFI_CPU_ARCH_PROTOCOL  mCpu       = {
  CpuFlushCpuDataCache,
  CpuEnableInterrupt,
  CpuDisableInterrupt,
  CpuGetInterruptState,
  CpuInit,
  CpuRegisterInterruptHandler,
  CpuGetTimerValue,
  CpuSetMemoryAttributes,
  0,          // NumberOfTimers
  2048,       // DmaBufferAlignment
};
 
STATIC
VOID
InitializeDma (
  IN OUT  EFI_CPU_ARCH_PROTOCOL  *CpuArchProtocol
  )
{
  CpuArchProtocol->DmaBufferAlignment = ArmCacheWritebackGranule ();
}
 
EFI_STATUS
CpuDxeInitialize (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
{
  EFI_STATUS  Status;
  EFI_EVENT   IdleLoopEvent;
 
  InitializeExceptions (&mCpu);
 
  InitializeDma (&mCpu);
 
  Status = gBS->InstallMultipleProtocolInterfaces (
                  &mCpuHandle,
                  &gEfiCpuArchProtocolGuid,
                  &mCpu,
                  NULL
                  );
 
  //
  // Make sure GCD and MMU settings match. This API calls gDS->SetMemorySpaceAttributes ()
  // and that calls EFI_CPU_ARCH_PROTOCOL.SetMemoryAttributes, so this code needs to go
  // after the protocol is installed
  //
  mIsFlushingGCD = TRUE;
  SyncCacheConfig (&mCpu);
  mIsFlushingGCD = FALSE;
 
  // If the platform is a MPCore system then install the Configuration Table describing the
  // secondary core states
  if (ArmIsMpCore ()) {
    PublishArmProcessorTable ();
  }
 
  //
  // Setup a callback for idle events
  //
  Status = gBS->CreateEventEx (
                  EVT_NOTIFY_SIGNAL,
                  TPL_NOTIFY,
                  IdleLoopEventCallback,
                  NULL,
                  &gIdleLoopEventGuid,
                  &IdleLoopEvent
                  );
  ASSERT_EFI_ERROR (Status);
 
  return Status;
}