EmbeddedPkg: add base DtPlatformDtbLoaderLib implementation
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>
diff --git a/EmbeddedPkg/EmbeddedPkg.dsc b/EmbeddedPkg/EmbeddedPkg.dsc
index 1453cbf..16b368e 100644
--- a/EmbeddedPkg/EmbeddedPkg.dsc
+++ b/EmbeddedPkg/EmbeddedPkg.dsc
@@ -109,6 +109,9 @@
HiiLib|MdeModulePkg/Library/UefiHiiLib/UefiHiiLib.inf
UefiHiiServicesLib|MdeModulePkg/Library/UefiHiiServicesLib/UefiHiiServicesLib.inf
+ DxeServicesLib|MdePkg/Library/DxeServicesLib/DxeServicesLib.inf
+ DtPlatformDtbLoaderLib|EmbeddedPkg/Library/DxeDtPlatformDtbLoaderLibDefault/DxeDtPlatformDtbLoaderLibDefault.inf
+
[LibraryClasses.common.DXE_DRIVER]
PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
ReportStatusCodeLib|IntelFrameworkModulePkg/Library/DxeReportStatusCodeLibFramework/DxeReportStatusCodeLib.inf
@@ -247,6 +250,7 @@
EmbeddedPkg/Library/TemplateRealTimeClockLib/TemplateRealTimeClockLib.inf
EmbeddedPkg/Library/LzmaHobCustomDecompressLib/LzmaHobCustomDecompressLib.inf
EmbeddedPkg/Library/NullDmaLib/NullDmaLib.inf
+ EmbeddedPkg/Library/DxeDtPlatformDtbLoaderLibDefault/DxeDtPlatformDtbLoaderLibDefault.inf
EmbeddedPkg/Ebl/Ebl.inf
#### EmbeddedPkg/EblExternCmd/EblExternCmd.inf
diff --git a/EmbeddedPkg/Library/DxeDtPlatformDtbLoaderLibDefault/DxeDtPlatformDtbLoaderLibDefault.c b/EmbeddedPkg/Library/DxeDtPlatformDtbLoaderLibDefault/DxeDtPlatformDtbLoaderLibDefault.c
new file mode 100644
index 0000000..313d0b1
--- /dev/null
+++ b/EmbeddedPkg/Library/DxeDtPlatformDtbLoaderLibDefault/DxeDtPlatformDtbLoaderLibDefault.c
@@ -0,0 +1,60 @@
+/** @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/DxeServicesLib.h>
+#include <Library/MemoryAllocationLib.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;
+
+ Status = GetSectionFromAnyFv (&gDtPlatformDefaultDtbFileGuid,
+ EFI_SECTION_RAW, 0, &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;
+}
diff --git a/EmbeddedPkg/Library/DxeDtPlatformDtbLoaderLibDefault/DxeDtPlatformDtbLoaderLibDefault.inf b/EmbeddedPkg/Library/DxeDtPlatformDtbLoaderLibDefault/DxeDtPlatformDtbLoaderLibDefault.inf
new file mode 100644
index 0000000..9d49fc5
--- /dev/null
+++ b/EmbeddedPkg/Library/DxeDtPlatformDtbLoaderLibDefault/DxeDtPlatformDtbLoaderLibDefault.inf
@@ -0,0 +1,36 @@
+/** @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 = DxeDtPlatformDtbLoaderLibDefault
+ FILE_GUID = 419a1910-70da-4c99-8696-ba81a57be508
+ MODULE_TYPE = DXE_DRIVER
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = DtPlatformDtbLoaderLib|DXE_DRIVER
+
+[Sources]
+ DxeDtPlatformDtbLoaderLibDefault.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+ EmbeddedPkg/EmbeddedPkg.dec
+
+[LibraryClasses]
+ BaseLib
+ DxeServicesLib
+ MemoryAllocationLib
+
+[Guids]
+ gDtPlatformDefaultDtbFileGuid
