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      1 /*++ @file
      2   Reset Architectural Protocol as defined in UEFI/PI under Emulation
      3 
      4 Copyright (c) 2004 - 2009, Intel Corporation. All rights reserved.<BR>
      5 Portions copyright (c) 2010 - 2011, Apple Inc. All rights reserved.
      6 This program and the accompanying materials
      7 are licensed and made available under the terms and conditions of the BSD License
      8 which accompanies this distribution.  The full text of the license may be found at
      9 http://opensource.org/licenses/bsd-license.php
     10 
     11 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
     12 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
     13 
     14 **/
     15 
     16 #include <PiDxe.h>
     17 
     18 #include <Library/BaseLib.h>
     19 #include <Library/DebugLib.h>
     20 #include <Library/UefiLib.h>
     21 #include <Library/UefiDriverEntryPoint.h>
     22 #include <Library/MemoryAllocationLib.h>
     23 #include <Library/UefiBootServicesTableLib.h>
     24 #include <Library/EmuThunkLib.h>
     25 
     26 #include <Protocol/Reset.h>
     27 
     28 
     29 VOID
     30 EFIAPI
     31 EmuResetSystem (
     32   IN EFI_RESET_TYPE   ResetType,
     33   IN EFI_STATUS       ResetStatus,
     34   IN UINTN            DataSize,
     35   IN VOID             *ResetData OPTIONAL
     36   )
     37 {
     38   EFI_STATUS  Status;
     39   UINTN       HandleCount;
     40   EFI_HANDLE  *HandleBuffer;
     41   UINTN       Index;
     42 
     43   //
     44   // Disconnect all
     45   //
     46   Status = gBS->LocateHandleBuffer (
     47                   AllHandles,
     48                   NULL,
     49                   NULL,
     50                   &HandleCount,
     51                   &HandleBuffer
     52                   );
     53   if (!EFI_ERROR (Status)) {
     54     for (Index = 0; Index < HandleCount; Index++) {
     55       Status = gBS->DisconnectController (HandleBuffer[Index], NULL, NULL);
     56     }
     57 
     58     gBS->FreePool (HandleBuffer);
     59   }
     60 
     61 
     62   //
     63   // Discard ResetType, always return 0 as exit code
     64   //
     65   gEmuThunk->Exit (0);
     66 
     67   //
     68   // Should never go here
     69   //
     70   ASSERT (FALSE);
     71 
     72   return;
     73 }
     74 
     75 
     76 
     77 EFI_STATUS
     78 EFIAPI
     79 InitializeEmuReset (
     80   IN EFI_HANDLE        ImageHandle,
     81   IN EFI_SYSTEM_TABLE  *SystemTable
     82   )
     83 /*++
     84 
     85 Routine Description:
     86 
     87 
     88 Arguments:
     89 
     90   ImageHandle of the loaded driver
     91   Pointer to the System Table
     92 
     93 Returns:
     94 
     95   Status
     96 **/
     97 {
     98   EFI_STATUS  Status;
     99   EFI_HANDLE  Handle;
    100 
    101   SystemTable->RuntimeServices->ResetSystem = EmuResetSystem;
    102 
    103   Handle = NULL;
    104   Status = gBS->InstallMultipleProtocolInterfaces (
    105                   &Handle,
    106                   &gEfiResetArchProtocolGuid,
    107                   NULL,
    108                   NULL
    109                   );
    110   ASSERT_EFI_ERROR (Status);
    111 
    112   return Status;
    113 }
    114 
    115