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/** @file
Template library implementation to support ResetSystem Runtime call.
Fill in the templates with what ever makes you system reset.
Copyright (c) 2011, Samsung Electronics Co. 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 <PiDxe.h>
#include <Library/ArmLib.h>
#include <Library/BaseLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/PcdLib.h>
#include <Library/IoLib.h>
#include <Library/DebugLib.h>
#include <Library/EfiResetSystemLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/CacheMaintenanceLib.h>
#include <Platform/ArmPlatform.h>
VOID DestroyExynosMemMap(VOID);
typedef VOID (EFIAPI *CALL_STUB)(VOID);
VOID
DestroyExynosMemMap (
VOID
)
{
EFI_STATUS Status;
UINTN MemoryMapSize;
EFI_MEMORY_DESCRIPTOR *MemoryMap;
UINTN MapKey;
UINTN DescriptorSize;
UINTN DescriptorVersion;
UINTN Pages;
MemoryMap = NULL;
MemoryMapSize = 0;
do {
Status = gBS->GetMemoryMap (
&MemoryMapSize,
MemoryMap,
&MapKey,
&DescriptorSize,
&DescriptorVersion
);
if (Status == EFI_BUFFER_TOO_SMALL) {
Pages = EFI_SIZE_TO_PAGES (MemoryMapSize) + 1;
MemoryMap = AllocatePages (Pages);
//
// Get System MemoryMap
//
Status = gBS->GetMemoryMap (
&MemoryMapSize,
MemoryMap,
&MapKey,
&DescriptorSize,
&DescriptorVersion
);
// Don't do anything between the GetMemoryMap() and ExitBootServices()
if (!EFI_ERROR (Status)) {
Status = gBS->ExitBootServices (gImageHandle, MapKey);
if (EFI_ERROR (Status)) {
FreePages (MemoryMap, Pages);
MemoryMap = NULL;
MemoryMapSize = 0;
}
}
}
} while (EFI_ERROR (Status));
//Clean and invalidate caches.
WriteBackInvalidateDataCache();
InvalidateInstructionCache();
//Turning off Caches and MMU
ArmDisableDataCache ();
ArmDisableInstructionCache ();
ArmDisableMmu ();
}
/**
Resets the entire platform.
@param ResetType The type of reset to perform.
@param ResetStatus The status code for the reset.
@param DataSize The size, in bytes, of WatchdogData.
@param ResetData For a ResetType of EfiResetCold, EfiResetWarm, or
EfiResetShutdown the data buffer starts with a Null-terminated
Unicode string, optionally followed by additional binary data.
**/
EFI_STATUS
EFIAPI
LibResetSystem (
IN EFI_RESET_TYPE ResetType,
IN EFI_STATUS ResetStatus,
IN UINTN DataSize,
IN CHAR16 *ResetData OPTIONAL
)
{
CALL_STUB StartOfFv;
UINTN PmuBase;
if (ResetData != NULL) {
DEBUG ((EFI_D_ERROR, "%s", ResetData));
}
DestroyExynosMemMap();
switch (ResetType) {
case EfiResetWarm:
//Perform warm reset of the system by jumping to the begining of the FV
// ((ptrImageStart)PcdGet32(PcdFvBaseAddress))();
StartOfFv = (CALL_STUB)(UINTN)PcdGet32(PcdFvBaseAddress);
StartOfFv ();
break;
case EfiResetCold:
case EfiResetShutdown:
default:
//Perform cold reset of the system.
PmuBase = (UINTN)PcdGet32(PcdPmuBase);
MmioWrite32 ((PmuBase + SWRESET_OFFSET), 0x01);
while ((MmioRead32(PmuBase + SWRESET_OFFSET)) != 0x1);
break;
}
// If the reset didn't work, return an error.
ASSERT (FALSE);
return EFI_DEVICE_ERROR;
}
/**
Initialize any infrastructure required for LibResetSystem () to function.
@param ImageHandle The firmware allocated handle for the EFI image.
@param SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
**/
EFI_STATUS
EFIAPI
LibInitializeResetSystem (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
return EFI_SUCCESS;
}
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