1 /** @file 2 * 3 * Copyright (c) 2017, Linaro, Ltd. All rights reserved. 4 * 5 * This program and the accompanying materials 6 * are licensed and made available under the terms and conditions of the BSD License 7 * which accompanies this distribution. The full text of the license may be found at 8 * http://opensource.org/licenses/bsd-license.php 9 * 10 * THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 12 * 13 **/ 14 15 #include <PiDxe.h> 16 17 #include <Library/BaseLib.h> 18 #include <Library/DxeServicesLib.h> 19 #include <Library/MemoryAllocationLib.h> 20 21 /** 22 Return a pool allocated copy of the DTB image that is appropriate for 23 booting the current platform via DT. 24 25 @param[out] Dtb Pointer to the DTB copy 26 @param[out] DtbSize Size of the DTB copy 27 28 @retval EFI_SUCCESS Operation completed successfully 29 @retval EFI_NOT_FOUND No suitable DTB image could be located 30 @retval EFI_OUT_OF_RESOURCES No pool memory available 31 32 **/ 33 EFI_STATUS 34 EFIAPI 35 DtPlatformLoadDtb ( 36 OUT VOID **Dtb, 37 OUT UINTN *DtbSize 38 ) 39 { 40 EFI_STATUS Status; 41 VOID *OrigDtb; 42 VOID *CopyDtb; 43 UINTN OrigDtbSize; 44 45 Status = GetSectionFromAnyFv (&gDtPlatformDefaultDtbFileGuid, 46 EFI_SECTION_RAW, 0, &OrigDtb, &OrigDtbSize); 47 if (EFI_ERROR (Status)) { 48 return EFI_NOT_FOUND; 49 } 50 51 CopyDtb = AllocateCopyPool (OrigDtbSize, OrigDtb); 52 if (CopyDtb == NULL) { 53 return EFI_OUT_OF_RESOURCES; 54 } 55 56 *Dtb = CopyDtb; 57 *DtbSize = OrigDtbSize; 58 59 return EFI_SUCCESS; 60 } 61
