Add an initial platform DXE driver and support for ramdisk devices.
Signed-off-by: Deepak Pandey <deepak.pan...@arm.com>
Signed-off-by: Khasim Syed Mohammed <khasim.moham...@arm.com>
---
Platform/ARM/N1Sdp/Drivers/PlatformDxe/PlatformDxe.inf | 44 +++++++++++++++++
Platform/ARM/N1Sdp/Drivers/PlatformDxe/PlatformDxe.c | 51
++++++++++++++++++++
2 files changed, 95 insertions(+)
diff --git a/Platform/ARM/N1Sdp/Drivers/PlatformDxe/PlatformDxe.inf
b/Platform/ARM/N1Sdp/Drivers/PlatformDxe/PlatformDxe.inf
new file mode 100644
index 000000000000..925bde4063cc
--- /dev/null
+++ b/Platform/ARM/N1Sdp/Drivers/PlatformDxe/PlatformDxe.inf
@@ -0,0 +1,44 @@
+## @file
+# Platform DXE driver for N1Sdp
+#
+# Copyright (c) 2021, ARM Limited. All rights reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+ INF_VERSION = 0x0001001B
+ BASE_NAME = PlatformDxe
+ FILE_GUID = 11fc8b5a-377d-47a8-aee9-0093d3d3407f
+ MODULE_TYPE = DXE_DRIVER
+ VERSION_STRING = 1.0
+ ENTRY_POINT = ArmN1SdpEntryPoint
+
+[Sources.common]
+ PlatformDxe.c
+
+[Packages]
+ ArmPkg/ArmPkg.dec
+ ArmPlatformPkg/ArmPlatformPkg.dec
+ EmbeddedPkg/EmbeddedPkg.dec
+ MdeModulePkg/MdeModulePkg.dec
+ MdePkg/MdePkg.dec
+ Platform/ARM/N1Sdp/N1SdpPlatform.dec
+
+[LibraryClasses]
+ HobLib
+ UefiDriverEntryPoint
+
+[Protocols]
+ gEfiRamDiskProtocolGuid
+
+[FeaturePcd]
+ gArmN1SdpTokenSpaceGuid.PcdRamDiskSupported
+
+[FixedPcd]
+ gArmN1SdpTokenSpaceGuid.PcdRamDiskBase
+ gArmN1SdpTokenSpaceGuid.PcdRamDiskSize
+
+[Depex]
+ gEfiRamDiskProtocolGuid
diff --git a/Platform/ARM/N1Sdp/Drivers/PlatformDxe/PlatformDxe.c
b/Platform/ARM/N1Sdp/Drivers/PlatformDxe/PlatformDxe.c
new file mode 100644
index 000000000000..e0b89556d40d
--- /dev/null
+++ b/Platform/ARM/N1Sdp/Drivers/PlatformDxe/PlatformDxe.c
@@ -0,0 +1,51 @@
+/** @file
+
+ Copyright (c) 2021, ARM Limited. All rights reserved.<BR>
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Library/DebugLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Protocol/RamDisk.h>
+
+/**
+ Entrypoint of Platform Dxe Driver
+
+ @param ImageHandle[in] The firmware allocated handle for the EFI
image.
+ @param SystemTable[in] A pointer to the EFI System Table.
+
+ @retval EFI_SUCCESS The entry point is executed successfully.
+**/
+EFI_STATUS
+EFIAPI
+ArmN1SdpEntryPoint (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+ EFI_RAM_DISK_PROTOCOL *RamDisk;
+ EFI_DEVICE_PATH_PROTOCOL *DevicePath;
+
+ Status = EFI_UNSUPPORTED;
+ if (FeaturePcdGet (PcdRamDiskSupported)) {
+ Status = gBS->LocateProtocol (&gEfiRamDiskProtocolGuid, NULL, (VOID**)
&RamDisk);
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR, "%a: Couldn't find the RAM Disk protocol - %r\n",
__FUNCTION__, Status));
+ return Status;
+ }
+
+ Status = RamDisk->Register (
+ (UINTN)PcdGet32(PcdRamDiskBase),
+ (UINTN)PcdGet32(PcdRamDiskSize),
+ &gEfiVirtualCdGuid,
+ NULL,
+ &DevicePath);
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR, "%a: Failed to register RAM Disk - %r\n",
__FUNCTION__, Status));
+ }
+ }
+ return Status;
+}
--
2.17.1
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