4c725c8959
Introduce an implementation of the new DtPlatformDtbLoaderLib library class that simply retrieves the first raw section of an FV file named 'gDtPlatformDefaultDtbFileGuid'. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Laszlo Ersek <lersek@redhat.com>
61 lines
1.7 KiB
C
61 lines
1.7 KiB
C
/** @file
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*
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* Copyright (c) 2017, Linaro, Ltd. All rights reserved.
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*
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* This program and the accompanying materials
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* are licensed and made available under the terms and conditions of the BSD License
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* which accompanies this distribution. The full text of the license may be found at
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* http://opensource.org/licenses/bsd-license.php
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*
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* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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*
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**/
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#include <PiDxe.h>
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#include <Library/BaseLib.h>
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#include <Library/DxeServicesLib.h>
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#include <Library/MemoryAllocationLib.h>
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/**
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Return a pool allocated copy of the DTB image that is appropriate for
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booting the current platform via DT.
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@param[out] Dtb Pointer to the DTB copy
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@param[out] DtbSize Size of the DTB copy
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@retval EFI_SUCCESS Operation completed successfully
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@retval EFI_NOT_FOUND No suitable DTB image could be located
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@retval EFI_OUT_OF_RESOURCES No pool memory available
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**/
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EFI_STATUS
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EFIAPI
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DtPlatformLoadDtb (
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OUT VOID **Dtb,
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OUT UINTN *DtbSize
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)
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{
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EFI_STATUS Status;
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VOID *OrigDtb;
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VOID *CopyDtb;
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UINTN OrigDtbSize;
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Status = GetSectionFromAnyFv (&gDtPlatformDefaultDtbFileGuid,
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EFI_SECTION_RAW, 0, &OrigDtb, &OrigDtbSize);
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if (EFI_ERROR (Status)) {
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return EFI_NOT_FOUND;
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}
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CopyDtb = AllocateCopyPool (OrigDtbSize, OrigDtb);
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if (CopyDtb == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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*Dtb = CopyDtb;
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*DtbSize = OrigDtbSize;
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return EFI_SUCCESS;
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}
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