This patch adds a PEI to parse NT_FW_CONFIG and pass it to
other PEI modules(as PPI) and DXE modules(as HOB).
Signed-off-by: sahil <sa...@arm.com>
---
Platform/ARM/N1Sdp/Drivers/N1SdpNtFwConfigPei/NtFwConfigPei.inf | 41 ++++++
Platform/ARM/N1Sdp/Drivers/N1SdpNtFwConfigPei/NtFwConfigPei.c | 132
++++++++++++++++++++
2 files changed, 173 insertions(+)
diff --git a/Platform/ARM/N1Sdp/Drivers/N1SdpNtFwConfigPei/NtFwConfigPei.inf
b/Platform/ARM/N1Sdp/Drivers/N1SdpNtFwConfigPei/NtFwConfigPei.inf
new file mode 100644
index 000000000000..363351b5a1df
--- /dev/null
+++ b/Platform/ARM/N1Sdp/Drivers/N1SdpNtFwConfigPei/NtFwConfigPei.inf
@@ -0,0 +1,41 @@
+## @file
+# This PEI module parse the NtFwConfig for N1Sdp platform and produce
+# the PPI and HOB.
+#
+# Copyright (c) 2024, ARM Limited. All rights reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+ INF_VERSION = 0x0001001B
+ BASE_NAME = N1SdpNtFwConfigPei
+ FILE_GUID = CE76D56C-D3A5-4763-9138-DF09E1D1B614
+ MODULE_TYPE = PEIM
+ VERSION_STRING = 1.0
+ ENTRY_POINT = NtFwConfigPeEntryPoint
+
+[Sources]
+ NtFwConfigPei.c
+
+[Packages]
+ EmbeddedPkg/EmbeddedPkg.dec
+ MdePkg/MdePkg.dec
+ Silicon/ARM/NeoverseN1Soc/NeoverseN1Soc.dec
+
+[LibraryClasses]
+ DebugLib
+ FdtLib
+ HobLib
+ PeimEntryPoint
+
+[Ppis]
+ gArmNeoverseN1SocPlatformInfoDescriptorPpiGuid
+ gArmNeoverseN1SocParameterPpiGuid
+
+[Guids]
+ gArmNeoverseN1SocPlatformInfoDescriptorGuid
+
+[Depex]
+ gArmNeoverseN1SocParameterPpiGuid
diff --git a/Platform/ARM/N1Sdp/Drivers/N1SdpNtFwConfigPei/NtFwConfigPei.c
b/Platform/ARM/N1Sdp/Drivers/N1SdpNtFwConfigPei/NtFwConfigPei.c
new file mode 100644
index 000000000000..330377d21a79
--- /dev/null
+++ b/Platform/ARM/N1Sdp/Drivers/N1SdpNtFwConfigPei/NtFwConfigPei.c
@@ -0,0 +1,132 @@
+/** @file
+
+ Copyright (c) 2024, ARM Limited. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Library/DebugLib.h>
+#include <Library/HobLib.h>
+#include <Library/PeiServicesLib.h>
+
+#include <NeoverseN1Soc.h>
+#include <libfdt.h>
+
+STATIC EFI_PEI_PPI_DESCRIPTOR mPpi;
+
+/**
+ The entrypoint of the module, parse NtFwConfig and produce the PPI and HOB.
+
+ @param[in] FileHandle Handle of the file being invoked.
+ @param[in] PeiServices Describes the list of possible PEI Services.
+
+ @retval EFI_SUCCESS Either no NT_FW_CONFIG was given by EL3 firmware
+ OR the N1Sdp FDT HOB was successfully created.
+ @retval EFI_NOT_FOUND Error processing the DTB
+ @retval EFI_OUT_OF_RESOURCES Could not allocate memory for the HOB
+ @retval * Other errors are possible.
+**/
+EFI_STATUS
+EFIAPI
+NtFwConfigPeEntryPoint (
+ IN EFI_PEI_FILE_HANDLE FileHandle,
+ IN CONST EFI_PEI_SERVICES **PeiServices
+ )
+{
+ CONST NEOVERSEN1SOC_EL3_FW_HANDOFF_PARAM_PPI *ParamPpi;
+ CONST UINT32 *Property;
+ INT32 Offset;
+ NEOVERSEN1SOC_PLAT_INFO *PlatInfo;
+ INT32 Status;
+
+ PlatInfo = BuildGuidHob (
+ &gArmNeoverseN1SocPlatformInfoDescriptorGuid,
+ sizeof (*PlatInfo)
+ );
+
+ if (PlatInfo == NULL) {
+ DEBUG ((
+ DEBUG_ERROR,
+ "[%a]: failed to allocate platform info HOB\n",
+ gEfiCallerBaseName
+ ));
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ Status = PeiServicesLocatePpi (
+ &gArmNeoverseN1SocParameterPpiGuid,
+ 0,
+ NULL,
+ (VOID **)&ParamPpi
+ );
+
+ if (EFI_ERROR (Status)) {
+ DEBUG ((
+ DEBUG_ERROR,
+ "[%a]: failed to locate gArmNeoverseN1SocParameterPpiGuid - %r\n",
+ gEfiCallerBaseName,
+ Status
+ ));
+ return Status;
+ }
+
+ if (fdt_check_header (ParamPpi->NtFwConfig) != 0) {
+ DEBUG ((DEBUG_ERROR, "Invalid DTB file %p passed\n",
ParamPpi->NtFwConfig));
+ return EFI_NOT_FOUND;
+ }
+
+ Offset = fdt_subnode_offset (ParamPpi->NtFwConfig, 0, "platform-info");
+ if (Offset == -FDT_ERR_NOTFOUND) {
+ DEBUG ((DEBUG_ERROR, "Invalid DTB : platform-info node not found\n"));
+ return EFI_NOT_FOUND;
+ }
+
+ Property = fdt_getprop (ParamPpi->NtFwConfig, Offset, "local-ddr-size",
NULL);
+ if (Property == NULL) {
+ DEBUG ((DEBUG_ERROR, "local-ddr-size property not found\n"));
+ return EFI_NOT_FOUND;
+ }
+
+ PlatInfo->LocalDdrSize = fdt32_to_cpu (*Property);
+
+ Property = fdt_getprop (ParamPpi->NtFwConfig, Offset, "remote-ddr-size",
NULL);
+ if (Property == NULL) {
+ DEBUG ((DEBUG_ERROR, "remote-ddr-size property not found\n"));
+ return EFI_NOT_FOUND;
+ }
+
+ PlatInfo->RemoteDdrSize = fdt32_to_cpu (*Property);
+
+ Property = fdt_getprop (ParamPpi->NtFwConfig, Offset,
"secondary-chip-count", NULL);
+ if (Property == NULL) {
+ DEBUG ((DEBUG_ERROR, "secondary-chip-count property not found\n"));
+ return EFI_NOT_FOUND;
+ }
+
+ PlatInfo->SecondaryChipCount = fdt32_to_cpu (*Property);
+
+ Property = fdt_getprop (ParamPpi->NtFwConfig, Offset, "multichip-mode",
NULL);
+ if (Property == NULL) {
+ DEBUG ((DEBUG_ERROR, "multichip-mode property not found\n"));
+ return EFI_NOT_FOUND;
+ }
+
+ PlatInfo->MultichipMode = fdt32_to_cpu (*Property);
+
+ mPpi.Flags = EFI_PEI_PPI_DESCRIPTOR_PPI
+ | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST;
+ mPpi.Guid = &gArmNeoverseN1SocPlatformInfoDescriptorPpiGuid;
+ mPpi.Ppi = PlatInfo;
+
+ Status = PeiServicesInstallPpi (&mPpi);
+ if (EFI_ERROR (Status)) {
+ DEBUG ((
+ DEBUG_ERROR,
+ "[%a]: failed to install PEI service - %r\n",
+ gEfiCallerBaseName,
+ Status
+ ));
+ }
+
+ return Status;
+}
--
2.25.1
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