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/** @file
Reset Architectural Protocol implementation
Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "ResetSystem.h"
//
// The handle onto which the Reset Architectural Protocol is installed
//
EFI_HANDLE mResetHandle = NULL;
/**
The driver's entry point.
It initializes the Reset Architectural Protocol.
@param[in] ImageHandle The firmware allocated handle for the EFI image.
@param[in] SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS The entry point is executed successfully.
@retval other Cannot install ResetArch protocol.
**/
EFI_STATUS
EFIAPI
InitializeResetSystem (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
//
// Make sure the Reset Architectural Protocol is not already installed in the system
//
ASSERT_PROTOCOL_ALREADY_INSTALLED (NULL, &gEfiResetArchProtocolGuid);
//
// Hook the runtime service table
//
gRT->ResetSystem = ResetSystem;
//
// Now install the Reset RT AP on a new handle
//
Status = gBS->InstallMultipleProtocolInterfaces (
&mResetHandle,
&gEfiResetArchProtocolGuid,
NULL,
NULL
);
ASSERT_EFI_ERROR (Status);
return Status;
}
/**
Put the system into S3 power state.
**/
VOID
DoS3 (
VOID
)
{
EnterS3WithImmediateWake ();
//
// Should not return
//
CpuDeadLoop ();
}
/**
Resets the entire platform.
@param[in] ResetType The type of reset to perform.
@param[in] ResetStatus The status code for the reset.
@param[in] DataSize The size, in bytes, of WatchdogData.
@param[in] ResetData For a ResetType of EfiResetCold, EfiResetWarm, or
EfiResetShutdown the data buffer starts with a Null-terminated
string, optionally followed by additional binary data.
**/
VOID
EFIAPI
ResetSystem (
IN EFI_RESET_TYPE ResetType,
IN EFI_STATUS ResetStatus,
IN UINTN DataSize,
IN VOID *ResetData OPTIONAL
)
{
EFI_STATUS Status;
UINTN Size;
UINTN CapsuleDataPtr;
//
// Indicate reset system runtime service is called.
//
REPORT_STATUS_CODE (EFI_PROGRESS_CODE, (EFI_SOFTWARE_EFI_RUNTIME_SERVICE | EFI_SW_RS_PC_RESET_SYSTEM));
switch (ResetType) {
case EfiResetWarm:
//
//Check if there are pending capsules to process
//
Size = sizeof (CapsuleDataPtr);
Status = EfiGetVariable (
EFI_CAPSULE_VARIABLE_NAME,
&gEfiCapsuleVendorGuid,
NULL,
&Size,
(VOID *) &CapsuleDataPtr
);
if (Status == EFI_SUCCESS) {
//
//Process capsules across a system reset.
//
DoS3();
}
ResetWarm ();
break;
case EfiResetCold:
ResetCold ();
break;
case EfiResetShutdown:
ResetShutdown ();
return ;
default:
return ;
}
//
// Given we should have reset getting here would be bad
//
ASSERT (FALSE);
}
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