90 lines
2.2 KiB
C
90 lines
2.2 KiB
C
/** @file
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Arm Ffa library code for StandaloneMmCore.
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Copyright (c) 2024, Arm Limited. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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@par Glossary:
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- FF-A - Firmware Framework for Arm A-profile
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@par Reference(s):
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- Arm Firmware Framework for Arm A-Profile [https://developer.arm.com/documentation/den0077/latest]
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**/
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#include <PiMm.h>
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#include <Library/ArmLib.h>
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#include <Library/ArmSmcLib.h>
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#include <Library/ArmFfaLib.h>
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#include <Library/BaseLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/DebugLib.h>
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#include "ArmFfaCommon.h"
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/**
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Get mapped Rx/Tx buffers.
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@param [out] TxBuffer Address of TxBuffer
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@param [out] TxBufferSize Size of TxBuffer
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@param [out] RxBuffer Address of RxBuffer
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@param [out] RxBufferSize Size of RxBuffer
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@retval EFI_SUCCESS
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@retval Others Error.
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**/
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EFI_STATUS
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EFIAPI
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ArmFfaLibGetRxTxBuffers (
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OUT VOID **TxBuffer,
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OUT UINT64 *TxBufferSize,
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OUT VOID **RxBuffer,
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OUT UINT64 *RxBufferSize
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)
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{
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/*
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* StandaloneMm doesn't use Rx/Tx buffer.
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* So, return EFI_UNSUPPORTED.
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*/
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return EFI_UNSUPPORTED;
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}
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/**
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ArmFfaLib Constructor.
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@param [in] ImageHandle The firmware allocated handle for the EFI image
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@param [in] MmSystemTable A pointer to the Management mode System Table
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@retval EFI_SUCCESS Success
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@retval Others Error
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**/
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EFI_STATUS
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EFIAPI
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ArmFfaStandaloneMmLibConstructor (
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IN EFI_HANDLE ImageHandle,
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IN EFI_MM_SYSTEM_TABLE *MmSystemTable
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)
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{
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EFI_STATUS Status;
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Status = ArmFfaLibCommonInit ();
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if (Status == EFI_UNSUPPORTED) {
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/*
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* EFI_UNSUPPORTED means FF-A interface isn't available.
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* However, for Standalone MM modules, FF-A availability is not required.
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* i.e. Standalone MM could use SpmMm as a legitimate protocol.
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* Thus, returning EFI_SUCCESS here to avoid the entrypoint to assert.
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*/
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return EFI_SUCCESS;
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}
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if (EFI_ERROR (Status)) {
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DEBUG ((DEBUG_ERROR, "%a failed. Status = %r\n", __func__, Status));
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}
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return Status;
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}
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