new file mode 100644
@@ -0,0 +1,71 @@
+/** @file
+*
+* Copyright (c) 2017, Linaro, Ltd. All rights reserved.
+*
+* This program and the accompanying materials
+* are licensed and made available under the terms and conditions of the BSD License
+* which accompanies this distribution. The full text of the license may be found at
+* http://opensource.org/licenses/bsd-license.php
+*
+* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+*
+**/
+
+#include <PiDxe.h>
+
+#include <Library/BaseLib.h>
+#include <Library/DebugLib.h>
+#include <Library/DxeServicesLib.h>
+#include <Library/IoLib.h>
+#include <Library/MemoryAllocationLib.h>
+
+#include "ArmPlatform.h"
+
+/**
+ Return a pool allocated copy of the DTB image that is appropriate for
+ booting the current platform via DT.
+
+ @param[out] Dtb Pointer to the DTB copy
+ @param[out] DtbSize Size of the DTB copy
+
+ @retval EFI_SUCCESS Operation completed successfully
+ @retval EFI_NOT_FOUND No suitable DTB image could be located
+ @retval EFI_OUT_OF_RESOURCES No pool memory available
+
+**/
+EFI_STATUS
+EFIAPI
+DtPlatformLoadDtb (
+ OUT VOID **Dtb,
+ OUT UINTN *DtbSize
+ )
+{
+ EFI_STATUS Status;
+ VOID *OrigDtb;
+ VOID *CopyDtb;
+ UINTN OrigDtbSize;
+ UINT32 JunoRevision;
+
+ GetJunoRevision(JunoRevision);
+ ASSERT (JunoRevision >= JUNO_REVISION_R0 && JunoRevision <= JUNO_REVISION_R2);
+ if (JunoRevision < JUNO_REVISION_R0 || JunoRevision > JUNO_REVISION_R2) {
+ return EFI_NOT_FOUND;
+ }
+
+ Status = GetSectionFromAnyFv (&gDtPlatformDefaultDtbFileGuid,
+ EFI_SECTION_RAW, (UINTN)JunoRevision - 1, &OrigDtb, &OrigDtbSize);
+ if (EFI_ERROR (Status)) {
+ return EFI_NOT_FOUND;
+ }
+
+ CopyDtb = AllocateCopyPool (OrigDtbSize, OrigDtb);
+ if (CopyDtb == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ *Dtb = CopyDtb;
+ *DtbSize = OrigDtbSize;
+
+ return EFI_SUCCESS;
+}
new file mode 100644
@@ -0,0 +1,38 @@
+/** @file
+*
+* Copyright (c) 2017, Linaro, Ltd. All rights reserved.
+*
+* This program and the accompanying materials
+* are licensed and made available under the terms and conditions of the BSD License
+* which accompanies this distribution. The full text of the license may be found at
+* http://opensource.org/licenses/bsd-license.php
+*
+* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+*
+**/
+
+[Defines]
+ INF_VERSION = 0x00010019
+ BASE_NAME = JunoDtPlatformDtbLoaderLib
+ FILE_GUID = 050d6041-1508-4ae7-a69f-250155ccb567
+ MODULE_TYPE = DXE_DRIVER
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = DtPlatformDtbLoaderLib|DXE_DRIVER
+
+[Sources]
+ JunoDtPlatformDtbLoaderLib.c
+
+[Packages]
+ ArmPkg/ArmPkg.dec
+ MdePkg/MdePkg.dec
+ EmbeddedPkg/EmbeddedPkg.dec
+
+[LibraryClasses]
+ BaseLib
+ DxeServicesLib
+ IoLib
+ MemoryAllocationLib
+
+[Guids]
+ gDtPlatformDefaultDtbFileGuid
In preparation of switching to DtPlatformDxe to supply the device tree image to the OS, add an implementation of DtPlatformDtbLoaderLib that loads the correct version from an FV. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> --- Platforms/ARM/Juno/Library/JunoDtPlatformDtbLoaderLib/JunoDtPlatformDtbLoaderLib.c | 71 ++++++++++++++++++++ Platforms/ARM/Juno/Library/JunoDtPlatformDtbLoaderLib/JunoDtPlatformDtbLoaderLib.inf | 38 +++++++++++ 2 files changed, 109 insertions(+) -- 2.9.3 _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel