(This is migrated from edk2-platforms)
Cc: Daniel Schaefer <daniel.schaefer>
Cc: Abner Chang <abner.ch...@hpe.com>
Cc: Sunil V L <suni...@ventanamicro.com>
Reviewed-by: Abner Chang <abner.ch...@hpe.com>
Signed-off-by: Daniel Schaefer <daniel.schae...@hpe.com>
---
.../PlatformPkg/Universal/FdtPeim/FdtPeim.inf | 49 +++++++++++++
.../PlatformPkg/Universal/FdtPeim/FdtPeim.c | 70 +++++++++++++++++++
2 files changed, 119 insertions(+)
create mode 100644 Platform/RISC-V/PlatformPkg/Universal/FdtPeim/FdtPeim.inf
create mode 100644 Platform/RISC-V/PlatformPkg/Universal/FdtPeim/FdtPeim.c
diff --git a/Platform/RISC-V/PlatformPkg/Universal/FdtPeim/FdtPeim.inf
b/Platform/RISC-V/PlatformPkg/Universal/FdtPeim/FdtPeim.inf
new file mode 100644
index 0000000000..8dc58f0a8b
--- /dev/null
+++ b/Platform/RISC-V/PlatformPkg/Universal/FdtPeim/FdtPeim.inf
@@ -0,0 +1,49 @@
+## @file
+# The FDT Peim driver is used to pass the device tree to DXE phase.
+#
+# Copyright (c) 2021, Hewlett Packard Enterprise Developmente LP. All rights
reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = FdtPei
+ MODULE_UNI_FILE = FdtPei.uni
+ FILE_GUID = 724FD5E9-F35E-4386-B1E1-2ADA6103C4F9
+ MODULE_TYPE = PEIM
+ VERSION_STRING = 1.0
+
+ ENTRY_POINT = PeimPassFdt
+
+#
+# The following information is for reference only and not required by the
build tools.
+#
+# VALID_ARCHITECTURES = RISCV64
+#
+
+[Sources]
+ FdtPeim.c
+
+[Packages]
+ EmbeddedPkg/EmbeddedPkg.dec
+ MdePkg/MdePkg.dec
+ MdeModulePkg/MdeModulePkg.dec
+ Silicon/RISC-V/ProcessorPkg/RiscVProcessorPkg.dec
+
+[LibraryClasses]
+ DebugLib
+ DebugLib
+ HobLib
+ FdtLib
+ PcdLib
+ PeiServicesLib
+ PeimEntryPoint
+ RiscVFirmwareContextLib
+
+[Guids]
+ gFdtHobGuid ## PRODUCES
+
+[Depex]
+ TRUE
diff --git a/Platform/RISC-V/PlatformPkg/Universal/FdtPeim/FdtPeim.c
b/Platform/RISC-V/PlatformPkg/Universal/FdtPeim/FdtPeim.c
new file mode 100644
index 0000000000..2cd94f291c
--- /dev/null
+++ b/Platform/RISC-V/PlatformPkg/Universal/FdtPeim/FdtPeim.c
@@ -0,0 +1,70 @@
+/** @file
+The module to pass the device tree to DXE via HOB.
+
+Copyright (c) 2021, Hewlett Packard Enterprise Development LP. All rights
reserved.<BR>
+
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Library/DebugLib.h>
+#include <Library/HobLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/RiscVFirmwareContextLib.h>
+
+#include <libfdt.h>
+
+#include <Guid/FdtHob.h>
+
+/**
+ The entrypoint of the module, it will pass the FDT via a HOB.
+
+ @param FileHandle Handle of the file being invoked.
+ @param PeiServices Describes the list of possible PEI Services.
+
+ @retval TODO
+**/
+EFI_STATUS
+EFIAPI
+PeimPassFdt (
+ IN EFI_PEI_FILE_HANDLE FileHandle,
+ IN CONST EFI_PEI_SERVICES **PeiServices
+ )
+{
+ VOID *FdtPointer;
+ VOID *Base;
+ VOID *NewBase;
+ UINTN FdtSize;
+ UINTN FdtPages;
+ UINT64 *FdtHobData;
+ EFI_RISCV_OPENSBI_FIRMWARE_CONTEXT *FirmwareContext;
+
+ FirmwareContext = NULL;
+ GetFirmwareContextPointer (&FirmwareContext);
+
+ if (FirmwareContext == NULL) {
+ DEBUG((DEBUG_ERROR, "%a: OpenSBI Firmware Context is NULL\n",
__FUNCTION__));
+ return EFI_UNSUPPORTED;
+ }
+ FdtPointer = (VOID *)FirmwareContext->FlattenedDeviceTree;
+ if (FdtPointer == NULL) {
+ DEBUG((DEBUG_ERROR, "%a: Invalid FDT pointer\n", __FUNCTION__));
+ return EFI_UNSUPPORTED;
+ }
+ DEBUG((DEBUG_ERROR, "%a: Build FDT HOB - FDT at address: 0x%x \n",
__FUNCTION__, FdtPointer));
+ Base = FdtPointer;
+ ASSERT (Base != NULL);
+ ASSERT (fdt_check_header (Base) == 0);
+
+ FdtSize = fdt_totalsize (Base);
+ FdtPages = EFI_SIZE_TO_PAGES (FdtSize);
+ NewBase = AllocatePages (FdtPages);
+ ASSERT (NewBase != NULL);
+ fdt_open_into (Base, NewBase, EFI_PAGES_TO_SIZE (FdtPages));
+
+ FdtHobData = BuildGuidHob (&gFdtHobGuid, sizeof *FdtHobData);
+ ASSERT (FdtHobData != NULL);
+ *FdtHobData = (UINTN)NewBase;
+
+ return EFI_SUCCESS;
+}
--
2.31.1
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