/** @file | |
Arm Ffa library code for PeilessSec | |
Copyright (c) 2025, Arm Limited. All rights reserved.<BR> | |
SPDX-License-Identifier: BSD-2-Clause-Patent | |
@par Glossary: | |
- FF-A - Firmware Framework for Arm A-profile | |
@par Reference(s): | |
- Arm Firmware Framework for Arm A-Profile [https://developer.arm.com/documentation/den0077/latest] | |
**/ | |
#include <Uefi.h> | |
#include <Pi/PiMultiPhase.h> | |
#include <Library/ArmLib.h> | |
#include <Library/ArmSmcLib.h> | |
#include <Library/ArmFfaLib.h> | |
#include <Library/BaseLib.h> | |
#include <Library/BaseMemoryLib.h> | |
#include <Library/DebugLib.h> | |
#include <Library/HobLib.h> | |
#include <Library/MemoryAllocationLib.h> | |
#include <Library/PcdLib.h> | |
#include <IndustryStandard/ArmFfaSvc.h> | |
#include <Guid/ArmFfaRxTxBufferInfo.h> | |
#include "ArmFfaCommon.h" | |
#include "ArmFfaRxTxMap.h" | |
/** | |
ArmFfaLib Constructor. | |
@param [in] FileHandle File Handle | |
@param [in] PeiServices Pei Service Table | |
@retval EFI_SUCCESS Success | |
@retval Others Error | |
**/ | |
EFI_STATUS | |
EFIAPI | |
ArmFfaSecLibConstructor ( | |
IN VOID | |
) | |
{ | |
EFI_STATUS Status; | |
ARM_FFA_RX_TX_BUFFER_INFO *BufferInfo; | |
EFI_HOB_MEMORY_ALLOCATION *RxTxBufferAllocationHob; | |
Status = ArmFfaLibCommonInit (); | |
if (EFI_ERROR (Status)) { | |
if (Status == EFI_UNSUPPORTED) { | |
/* | |
* EFI_UNSUPPORTED return from ArmFfaLibCommonInit() means | |
* FF-A interface doesn't support. | |
* However, It doesn't make failure of loading driver/library instance | |
* (i.e) ArmPkg's MmCommunication Dxe/PEI Driver uses as well as SpmMm. | |
* So If FF-A is not supported the the MmCommunication Dxe/PEI falls | |
* back to SpmMm. | |
* For this case, return EFI_SUCCESS. | |
*/ | |
return EFI_SUCCESS; | |
} | |
return Status; | |
} | |
Status = ArmFfaLibRxTxMap (); | |
if (EFI_ERROR (Status)) { | |
return Status; | |
} | |
BufferInfo = BuildGuidHob ( | |
&gArmFfaRxTxBufferInfoGuid, | |
sizeof (ARM_FFA_RX_TX_BUFFER_INFO) | |
); | |
if (BufferInfo == NULL) { | |
DEBUG ((DEBUG_ERROR, "%a: Failed to create Rx/Tx Buffer Info Hob\n", __func__)); | |
ArmFfaLibRxTxUnmap (); | |
return EFI_OUT_OF_RESOURCES; | |
} | |
RxTxBufferAllocationHob = FindRxTxBufferAllocationHob (FALSE); | |
ASSERT (RxTxBufferAllocationHob != NULL); | |
/* | |
* Set then Name with gArmFfaRxTxBufferInfoGuid, so that ArmFfaPeiLib or | |
* ArmFfaDxeLib can find the Rx/Tx buffer allocation area. | |
*/ | |
CopyGuid ( | |
&RxTxBufferAllocationHob->AllocDescriptor.Name, | |
&gArmFfaRxTxBufferInfoGuid | |
); | |
UpdateRxTxBufferInfo (BufferInfo); | |
BufferInfo->RemapOffset = | |
(UINTN)(BufferInfo->TxBufferAddr - | |
RxTxBufferAllocationHob->AllocDescriptor.MemoryBaseAddress); | |
BufferInfo->RemapRequired = TRUE; | |
return EFI_SUCCESS; | |
} |