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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) 2012, 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/UefiRuntimeLib.h>
#include <Library/DxeServicesTableLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiRuntimeServicesTableLib.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>
#include <Guid/EventGroup.h>
/* Round off to 4KB pages */
#define ROUND_TO_PAGE(x) (x & 0xfffff000)
UINT32 gPmuBaseAddress = 0;
EFI_EVENT VirtualAddressChangeEvent = NULL;
VOID DestroyExynosMemMap(VOID);
typedef VOID (EFIAPI *ptrImageStart)(VOID);
/**
Virtual address change notification call back. It converts global pointer
to virtual address.
@param Event Event whose notification function is being invoked.
@param Context Pointer to the notification function's context, which is
always zero in current implementation.
**/
VOID
EFIAPI
VirtualAddressChangeCallBack (
IN EFI_EVENT Event,
IN VOID *Context
)
{
gRT->ConvertPointer(0, (VOID**)&gPmuBaseAddress);
gRT->ConvertPointer(0, (VOID**)&gRT);
}
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
)
{
volatile UINT32 count = 0;
if (EfiAtRuntime())
{
while (count < 0x1000000)
{
count++;
}
}
switch (ResetType) {
case EfiResetShutdown:
case EfiResetCold:
case EfiResetWarm:
//Perform warm reset of the system by jumping to the begining of the FV
//((ptrImageStart)PcdGet32(PcdFvBaseAddress))();
//break;
default:
if(EfiAtRuntime () == 0)
{
DestroyExynosMemMap();
}
/* Perform cold reset of the system - should not return */
MmioWrite32 ((gPmuBaseAddress + SWRESET_OFFSET), 0x01);
while ((MmioRead32(gPmuBaseAddress + SWRESET_OFFSET)) != 0x1);
break;
}
// If the reset didn't work, return an error.
ASSERT (FALSE);
return EFI_SUCCESS;
}
/**
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
)
{
EFI_STATUS Status;
EFI_GCD_MEMORY_SPACE_DESCRIPTOR PmuMemoryDescriptor;
gPmuBaseAddress = PcdGet32(PcdPmuBase);
/*
* Get the GCD Memory Descriptor specified by WdtBaseAddress page boundary
*/
Status = gDS->GetMemorySpaceDescriptor (ROUND_TO_PAGE(gPmuBaseAddress),
&PmuMemoryDescriptor);
ASSERT_EFI_ERROR (Status);
/*
* Mark the 4KB region as EFI_RUNTIME_MEMORY so the OS
* will allocate a virtual address range.
*/
Status = gDS->SetMemorySpaceAttributes (
ROUND_TO_PAGE(gPmuBaseAddress),
EFI_PAGE_SIZE,
PmuMemoryDescriptor.Attributes | EFI_MEMORY_RUNTIME);
ASSERT_EFI_ERROR (Status);
Status = gBS->CreateEventEx (
EVT_NOTIFY_SIGNAL,
TPL_NOTIFY,
VirtualAddressChangeCallBack,
NULL,
&gEfiEventVirtualAddressChangeGuid,
&VirtualAddressChangeEvent
);
ASSERT_EFI_ERROR (Status);
return EFI_SUCCESS;
}
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