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/** @file
SMM Firmware Volume Block Driver for the Tunnel Creek Platform.
Copyright (c) 2015, 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 <PiSmm.h>
#include <Protocol/SmmSpiDevice.h>
#include <Library/SmmServicesTableLib.h>
#include "FvbSmmCommon.h"
#include "FvbService.h"
/**
Communication service SMI Handler entry.
This SMI handler provides communication services with the SMM FVB runtime driver.
@param[in] DispatchHandle The unique handle assigned to this handler by SmiHandlerRegister().
@param[in] RegisterContext Points to an optional handler context which was specified when the
handler was registered.
@param[in, out] CommBuffer A pointer to a collection of data in memory that will
be conveyed from a non-SMM environment into an SMM environment.
@param[in, out] CommBufferSize The size of the CommBuffer.
@retval EFI_SUCCESS The interrupt was handled successfully.
@retval EFI_UNSUPPORTED The request was not supported by the handler.
**/
EFI_STATUS
EFIAPI
FvbSmmHandler (
IN EFI_HANDLE DispatchHandle,
IN CONST VOID *RegisterContext,
IN OUT VOID *CommBuffer,
IN OUT UINTN *CommBufferSize
)
{
EFI_STATUS Status;
SMM_FVB_COMMUNICATE_FUNCTION_HEADER *SmmFvbFunctionHeader;
SMM_FVB_ATTRIBUTES_HEADER *SmmFvbAttributesHeader;
SMM_FVB_PHYSICAL_ADDRESS_HEADER *SmmFvbPhysicalAddressHeader;
SMM_FVB_BLOCK_SIZE_HEADER *SmmFvbBlockSizeHeader;
SMM_FVB_READ_WRITE_HEADER *SmmFvbReadWriteHeader;
SMM_FVB_BLOCKS_HEADER *SmmFvbBlocksHeader;
ASSERT (CommBuffer != NULL);
//
// Determine the function that is being requested and execute it.
//
SmmFvbFunctionHeader = (SMM_FVB_COMMUNICATE_FUNCTION_HEADER *) CommBuffer;
switch (SmmFvbFunctionHeader->Function) {
case EFI_FUNCTION_GET_ATTRIBUTES:
SmmFvbAttributesHeader = (SMM_FVB_ATTRIBUTES_HEADER *) SmmFvbFunctionHeader->Data;
Status = FvbProtocolGetAttributes (
SmmFvbAttributesHeader->SmmFvb,
&SmmFvbAttributesHeader->Attributes
);
break;
case EFI_FUNCTION_SET_ATTRIBUTES:
SmmFvbAttributesHeader = (SMM_FVB_ATTRIBUTES_HEADER *) SmmFvbFunctionHeader->Data;
Status = FvbProtocolSetAttributes (
SmmFvbAttributesHeader->SmmFvb,
&SmmFvbAttributesHeader->Attributes
);
break;
case EFI_FUNCTION_GET_PHYSICAL_ADDRESS:
SmmFvbPhysicalAddressHeader = (SMM_FVB_PHYSICAL_ADDRESS_HEADER *) SmmFvbFunctionHeader->Data;
Status = FvbProtocolGetPhysicalAddress (
SmmFvbPhysicalAddressHeader->SmmFvb,
&SmmFvbPhysicalAddressHeader->Address
);
break;
case EFI_FUNCTION_GET_BLOCK_SIZE:
SmmFvbBlockSizeHeader = (SMM_FVB_BLOCK_SIZE_HEADER *) SmmFvbFunctionHeader->Data;
Status = FvbProtocolGetBlockSize (
SmmFvbBlockSizeHeader->SmmFvb,
SmmFvbBlockSizeHeader->Lba,
&SmmFvbBlockSizeHeader->BlockSize,
&SmmFvbBlockSizeHeader->NumOfBlocks
);
break;
case EFI_FUNCTION_READ:
SmmFvbReadWriteHeader = (SMM_FVB_READ_WRITE_HEADER *) SmmFvbFunctionHeader->Data;
Status = FvbProtocolRead (
SmmFvbReadWriteHeader->SmmFvb,
SmmFvbReadWriteHeader->Lba,
SmmFvbReadWriteHeader->Offset,
&SmmFvbReadWriteHeader->NumBytes,
(UINT8 *) (SmmFvbReadWriteHeader + 1)
);
break;
case EFI_FUNCTION_WRITE:
SmmFvbReadWriteHeader = (SMM_FVB_READ_WRITE_HEADER *) SmmFvbFunctionHeader->Data;
Status = FvbProtocolWrite (
SmmFvbReadWriteHeader->SmmFvb,
SmmFvbReadWriteHeader->Lba,
SmmFvbReadWriteHeader->Offset,
&SmmFvbReadWriteHeader->NumBytes,
(UINT8 *) (SmmFvbReadWriteHeader + 1)
);
break;
case EFI_FUNCTION_ERASE_BLOCKS:
SmmFvbBlocksHeader = (SMM_FVB_BLOCKS_HEADER *) SmmFvbFunctionHeader->Data;
Status = FvbProtocolEraseBlocks (
SmmFvbBlocksHeader->SmmFvb,
SmmFvbBlocksHeader->StartLba,
SmmFvbBlocksHeader->NumOfLba,
EFI_LBA_LIST_TERMINATOR,
0
);
break;
default:
ASSERT (FALSE);
Status = EFI_UNSUPPORTED;
}
//
// Set the return value.
//
SmmFvbFunctionHeader->ReturnStatus = Status;
return EFI_SUCCESS;
}
/**
The function installs EFI_SMM_FIRMWARE_VOLUME_BLOCK protocol
for each FV in the system.
@param[in] FwhInstance The pointer to a FW volume instance structure,
which contains the information about one FV.
@param[in] InstanceNum The instance number which can be used as a ID
to locate this FwhInstance in other functions.
@retval VOID
**/
VOID
InstallFvbProtocol (
IN EFI_FW_VOL_INSTANCE *FwhInstance,
IN UINTN InstanceNum
)
{
EFI_FW_VOL_BLOCK_DEVICE *FvbDevice;
EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader;
EFI_STATUS Status;
EFI_HANDLE FvbHandle;
FvbDevice = (EFI_FW_VOL_BLOCK_DEVICE *) AllocateRuntimeCopyPool (
sizeof (EFI_FW_VOL_BLOCK_DEVICE),
&mFvbDeviceTemplate
);
ASSERT (FvbDevice != NULL);
FvbDevice->Instance = InstanceNum;
FwVolHeader = &FwhInstance->VolumeHeader;
//
// Set up the devicepath
//
if (FwVolHeader->ExtHeaderOffset == 0) {
//
// FV does not contains extension header, then produce MEMMAP_DEVICE_PATH
//
FvbDevice->DevicePath = (EFI_DEVICE_PATH_PROTOCOL *) AllocateRuntimeCopyPool (sizeof (FV_MEMMAP_DEVICE_PATH), &mFvMemmapDevicePathTemplate);
((FV_MEMMAP_DEVICE_PATH *) FvbDevice->DevicePath)->MemMapDevPath.StartingAddress = FwhInstance->FvBase;
((FV_MEMMAP_DEVICE_PATH *) FvbDevice->DevicePath)->MemMapDevPath.EndingAddress = FwhInstance->FvBase + FwVolHeader->FvLength - 1;
} else {
FvbDevice->DevicePath = (EFI_DEVICE_PATH_PROTOCOL *) AllocateRuntimeCopyPool (sizeof (FV_PIWG_DEVICE_PATH), &mFvPIWGDevicePathTemplate);
CopyGuid (
&((FV_PIWG_DEVICE_PATH *)FvbDevice->DevicePath)->FvDevPath.FvName,
(GUID *)(UINTN)(FwhInstance->FvBase + FwVolHeader->ExtHeaderOffset)
);
}
//
// Install the SMM Firmware Volume Block Protocol and Device Path Protocol
//
FvbHandle = NULL;
Status = gSmst->SmmInstallProtocolInterface (
&FvbHandle,
&gEfiSmmFirmwareVolumeBlockProtocolGuid,
EFI_NATIVE_INTERFACE,
&FvbDevice->FwVolBlockInstance
);
ASSERT_EFI_ERROR (Status);
Status = gSmst->SmmInstallProtocolInterface (
&FvbHandle,
&gEfiDevicePathProtocolGuid,
EFI_NATIVE_INTERFACE,
FvbDevice->DevicePath
);
ASSERT_EFI_ERROR (Status);
//
// Notify the Fvb wrapper driver SMM fvb is ready
//
FvbHandle = NULL;
Status = gBS->InstallProtocolInterface (
&FvbHandle,
&gEfiSmmFirmwareVolumeBlockProtocolGuid,
EFI_NATIVE_INTERFACE,
&FvbDevice->FwVolBlockInstance
);
}
/**
The driver entry point for SMM Firmware Volume Block Driver.
The function does the necessary initialization work
Firmware Volume Block Driver.
@param[in] ImageHandle The firmware allocated handle for the UEFI image.
@param[in] SystemTable A pointer to the EFI system table.
@retval EFI_SUCCESS This funtion always return EFI_SUCCESS.
It will ASSERT on errors.
**/
EFI_STATUS
EFIAPI
FvbSmmInitialize (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
EFI_HANDLE FvbHandle;
//
// Locate required protocol for access to flash.
//
Status = gSmst->SmmLocateProtocol (
&gSmmSpiDeviceProtocolGuid,
NULL,
(VOID **) &mSpiDeviceProtocol
);
ASSERT_EFI_ERROR(Status);
//
// Initialize the rest of the module.
//
FvbInitialize ();
//
// Register SMM variable SMI handler
//
Status = gSmst->SmiHandlerRegister (FvbSmmHandler, &gEfiSmmFirmwareVolumeBlockProtocolGuid, &FvbHandle);
ASSERT_EFI_ERROR (Status);
return EFI_SUCCESS;
}
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