Implements SpcrDeviceLib library for AMD common boards.
Cc: Abner Chang <[email protected]>
Signed-off-by: Abdul Lateef Attar <[email protected]>
---
.../AMD/AmdMinBoardPkg/AmdMinBoardPkg.dsc | 6 ++
.../Library/SpcrDeviceLib/SpcrDeviceLib.inf | 23 +++++
.../Library/SpcrDeviceLib/SpcrDeviceLib.c | 84 +++++++++++++++++++
3 files changed, 113 insertions(+)
create mode 100755
Platform/AMD/AmdMinBoardPkg/Library/SpcrDeviceLib/SpcrDeviceLib.inf
create mode 100755
Platform/AMD/AmdMinBoardPkg/Library/SpcrDeviceLib/SpcrDeviceLib.c
diff --git a/Platform/AMD/AmdMinBoardPkg/AmdMinBoardPkg.dsc
b/Platform/AMD/AmdMinBoardPkg/AmdMinBoardPkg.dsc
index 2f17db5df5fb..273cd74f7842 100644
--- a/Platform/AMD/AmdMinBoardPkg/AmdMinBoardPkg.dsc
+++ b/Platform/AMD/AmdMinBoardPkg/AmdMinBoardPkg.dsc
@@ -22,9 +22,15 @@ [Packages]
MinPlatformPkg/MinPlatformPkg.dec
UefiCpuPkg/UefiCpuPkg.dec
+[LibraryClasses]
+ SpcrDeviceLib|AmdMinBoardPkg/Library/SpcrDeviceLib/SpcrDeviceLib.inf
+
[LibraryClasses.common.PEIM]
SetCacheMtrrLib|AmdMinBoardPkg/Library/SetCacheMtrrLib/SetCacheMtrrLib.inf
+[Components]
+ AmdMinBoardPkg/Library/SpcrDeviceLib/SpcrDeviceLib.inf
+
[Components.IA32]
AmdMinBoardPkg/Library/SetCacheMtrrLib/SetCacheMtrrLib.inf
diff --git
a/Platform/AMD/AmdMinBoardPkg/Library/SpcrDeviceLib/SpcrDeviceLib.inf
b/Platform/AMD/AmdMinBoardPkg/Library/SpcrDeviceLib/SpcrDeviceLib.inf
new file mode 100755
index 000000000000..d9b77e586aa8
--- /dev/null
+++ b/Platform/AMD/AmdMinBoardPkg/Library/SpcrDeviceLib/SpcrDeviceLib.inf
@@ -0,0 +1,23 @@
+## @file
+# Implementation for SpcrDeviceLib Library.
+# SpcrDeviceLib is usd for Serial Port Console Redirection Table (SPCR) device.
+#
+# Copyright (C) 2023 Advanced Micro Devices, Inc. All rights reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+ INF_VERSION = 1.29
+ BASE_NAME = SpcrDeviceLib
+ FILE_GUID = 9232A55A-45E3-424A-94C6-615AF63C9A6B
+ VERSION_STRING = 1.0
+ MODULE_TYPE = BASE
+ LIBRARY_CLASS = SpcrDeviceLib
+
+[Packages]
+ MdePkg/MdePkg.dec
+
+[Sources]
+ SpcrDeviceLib.c
diff --git a/Platform/AMD/AmdMinBoardPkg/Library/SpcrDeviceLib/SpcrDeviceLib.c
b/Platform/AMD/AmdMinBoardPkg/Library/SpcrDeviceLib/SpcrDeviceLib.c
new file mode 100755
index 000000000000..0762f16fb360
--- /dev/null
+++ b/Platform/AMD/AmdMinBoardPkg/Library/SpcrDeviceLib/SpcrDeviceLib.c
@@ -0,0 +1,84 @@
+/** @file
+
+Implements SpcrDeviceLib library functions.
+This library implementation is for AMD processor based platforms.
+
+Copyright (C) 2023 Advanced Micro Devices, Inc. All rights reserved.<BR>
+
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Include/Uefi.h>
+#include <Protocol/DevicePath.h>
+#include <Library/UefiLib.h>
+#include <Library/DevicePathLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/MemoryAllocationLib.h>
+
+STATIC EFI_GUID TerminalTypeGuid[] = {
+ DEVICE_PATH_MESSAGING_PC_ANSI,
+ DEVICE_PATH_MESSAGING_VT_100,
+ DEVICE_PATH_MESSAGING_VT_100_PLUS,
+ DEVICE_PATH_MESSAGING_VT_UTF8
+};
+
+/**
+ Get a Serial Port device for SPCR.
+
+ @retval NULL Fails to get the DevicePath
+ DevicePath If success
+
+**/
+EFI_DEVICE_PATH_PROTOCOL *
+EFIAPI
+GetSpcrDevice (
+ VOID
+ )
+{
+ EFI_DEVICE_PATH_PROTOCOL *VarConsole;
+ EFI_DEVICE_PATH_PROTOCOL *DevicePath;
+ EFI_DEVICE_PATH_PROTOCOL *TmpDevicePath;
+ VENDOR_DEVICE_PATH *Vendor;
+ UINTN Size;
+ BOOLEAN Found;
+ UINTN Index;
+
+ // look for supported terminal type GUID in the device path
+ if (GetEfiGlobalVariable2 (L"ConOut", (VOID **)&VarConsole, NULL) ==
EFI_SUCCESS) {
+ do {
+ // Get the Single Device Path
+ DevicePath = GetNextDevicePathInstance (&VarConsole, &Size);
+ if (DevicePath == NULL) {
+ return NULL;
+ }
+
+ TmpDevicePath = DevicePath;
+ Found = FALSE;
+ while (!IsDevicePathEnd (TmpDevicePath)) {
+ // search for terminal type
+ Vendor = (VENDOR_DEVICE_PATH *)TmpDevicePath;
+ for (Index = 0; Index < (sizeof (TerminalTypeGuid) / sizeof
(TerminalTypeGuid[0])); Index++) {
+ if (CompareGuid (&Vendor->Guid, &TerminalTypeGuid[Index])) {
+ Found = TRUE;
+ break;
+ }
+ }
+
+ if (Found) {
+ break;
+ }
+
+ TmpDevicePath = NextDevicePathNode (TmpDevicePath);
+ }
+
+ if (Found) {
+ return (DevicePath);
+ }
+
+ FreePool (DevicePath);
+ } while (VarConsole != NULL);
+ }
+
+ return NULL;
+}
--
2.25.1
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