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/** @file
Arm Ffa library code for PEI Driver
Copyright (c) 2024, 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 <PiPei.h>
#include <Pi/PiPeiCis.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 "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
ArmFfaPeiLibConstructor (
IN EFI_PEI_FILE_HANDLE FileHandle,
IN CONST EFI_PEI_SERVICES **PeiServices
)
{
EFI_STATUS Status;
EFI_HOB_GUID_TYPE *RxTxBufferHob;
ARM_FFA_RX_TX_BUFFER_INFO *BufferInfo;
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;
}
RxTxBufferHob = GetFirstGuidHob (&gArmFfaRxTxBufferInfoGuid);
if (RxTxBufferHob == NULL) {
Status = ArmFfaLibRxTxMap ();
if (EFI_ERROR (Status)) {
return Status;
}
BufferInfo = BuildGuidHob (
&gArmFfaRxTxBufferInfoGuid,
sizeof (ARM_FFA_RX_TX_BUFFER_INFO)
);
if (BufferInfo == NULL) {
ArmFfaLibRxTxUnmap ();
return EFI_OUT_OF_RESOURCES;
}
BufferInfo->TxBufferAddr = (VOID *)(UINTN)PcdGet64 (PcdFfaTxBuffer);
BufferInfo->TxBufferSize = PcdGet64 (PcdFfaTxRxPageCount) * EFI_PAGE_SIZE;
BufferInfo->RxBufferAddr = (VOID *)(UINTN)PcdGet64 (PcdFfaRxBuffer);
BufferInfo->RxBufferSize = PcdGet64 (PcdFfaTxRxPageCount) * EFI_PAGE_SIZE;
}
return EFI_SUCCESS;
}
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