EmulatorPkg/ResetRuntimeDxe/Reset.c

/*++ @file
  Reset Architectural Protocol as defined in UEFI/PI under Emulation

Copyright (c) 2004 - 2009, Intel Corporation. All rights reserved.<BR>
Portions copyright (c) 2010 - 2011, Apple Inc. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#include <PiDxe.h>

#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/UefiLib.h>
#include <Library/UefiDriverEntryPoint.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/EmuThunkLib.h>

#include <Protocol/Reset.h>

VOID
EFIAPI
EmuResetSystem (
  IN EFI_RESET_TYPE  ResetType,
  IN EFI_STATUS      ResetStatus,
  IN UINTN           DataSize,
  IN VOID            *ResetData OPTIONAL
  )
{
  EFI_STATUS  Status;
  UINTN       HandleCount;
  EFI_HANDLE  *HandleBuffer;
  UINTN       Index;

  //
  // Disconnect all
  //
  Status = gBS->LocateHandleBuffer (
                  AllHandles,
                  NULL,
                  NULL,
                  &HandleCount,
                  &HandleBuffer
                  );
  if (!EFI_ERROR (Status)) {
    for (Index = 0; Index < HandleCount; Index++) {
      Status = gBS->DisconnectController (HandleBuffer[Index], NULL, NULL);
    }

    gBS->FreePool (HandleBuffer);
  }

  //
  // Discard ResetType, always return 0 as exit code
  //
  gEmuThunk->Exit (0);

  //
  // Should never go here
  //
  ASSERT (FALSE);

  return;
}

EFI_STATUS
EFIAPI
InitializeEmuReset (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )

/*++

Routine Description:


Arguments:

  ImageHandle of the loaded driver
  Pointer to the System Table

Returns:

  Status
**/
{
  EFI_STATUS  Status;
  EFI_HANDLE  Handle;

  SystemTable->RuntimeServices->ResetSystem = EmuResetSystem;

  Handle = NULL;
  Status = gBS->InstallMultipleProtocolInterfaces (
                  &Handle,
                  &gEfiResetArchProtocolGuid,
                  NULL,
                  NULL
                  );
  ASSERT_EFI_ERROR (Status);

  return Status;
}