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/********************************************************************************
Copyright (C) 2016 Marvell International Ltd.
Marvell BSD License Option
If you received this File from Marvell, you may opt to use, redistribute and/or
modify this File under the following licensing terms.
Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of Marvell nor the names of its contributors may be
used to endorse or promote products derived from this software without
specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*******************************************************************************/
#include <PiDxe.h>
#include <Uefi.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/DxeServicesTableLib.h>
#include <Library/IoLib.h>
#include <Library/UefiLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiRuntimeLib.h>
#include <Library/UefiRuntimeServicesTableLib.h>
#include <Guid/EventGroup.h>
STATIC EFI_EVENT mResetSystemVirtualAddrChangeEvent;
STATIC UINT64 mAddress;
STATIC
VOID
EFIAPI
LibResetSystemVirtualNotifyEvent (
IN EFI_EVENT Event,
IN VOID *Context
)
{
//
// Convert physical address to virtual address.
//
EfiConvertPointer (0x0, (VOID**)&mAddress);
return;
}
/**
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 VOID *ResetData OPTIONAL
)
{
UINT32 Data;
switch (ResetType) {
case EfiResetCold:
case EfiResetWarm:
Data = MmioRead32 (mAddress);
Data &= ~PcdGet32 (PcdResetRegMask);
MmioWrite32 (mAddress, Data);
break;
case EfiResetShutdown:
//
// Currently there is no support for power-off platform
//
break;
default:
break;
}
return EFI_DEVICE_ERROR;
}
EFI_STATUS
EFIAPI
LibInitializeResetSystem (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
UINT64 Alignment;
EFI_STATUS Status;
mAddress = PcdGet64 (PcdResetRegAddress);
Alignment = ~(SIZE_64KB - 1);
//
// Add 64KB aligned and 64KB long memory space
//
Status = gDS->AddMemorySpace (
EfiGcdMemoryTypeMemoryMappedIo,
mAddress & Alignment, SIZE_64KB,
EFI_MEMORY_UC | EFI_MEMORY_RUNTIME
);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
return Status;
}
//
// Mark 64KB aligned and 64KB long memory space as runtime
//
Status = gDS->SetMemorySpaceAttributes (mAddress & Alignment, SIZE_64KB,
EFI_MEMORY_UC | EFI_MEMORY_RUNTIME);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
return Status;
}
//
// Register for the virtual address change event
//
Status = gBS->CreateEventEx (
EVT_NOTIFY_SIGNAL,
TPL_NOTIFY,
LibResetSystemVirtualNotifyEvent,
NULL,
&gEfiEventVirtualAddressChangeGuid,
&mResetSystemVirtualAddrChangeEvent
);
ASSERT_EFI_ERROR (Status);
return Status;
}
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