[PATCH 02/12] MdePkg: Add Null BaseDebugBootlog

["Alexander Graf" <graf@amazon.com>]

In some situations, we may not want to actually emit any boot log. This
commit adds a null bootlog handler. We will use this in situations where
we can not maintain a boot log, such as during the SEC phase.

Signed-off-by: Alexander Graf <graf@amazon.com>
---
 .../BaseDebugBootlogNullLib.inf               | 26 +++++++++++++++
 .../BaseDebugBootlog/DebugBootlogNull.c       | 32 +++++++++++++++++++
 2 files changed, 58 insertions(+)
 create mode 100644 MdePkg/Library/BaseDebugBootlog/BaseDebugBootlogNullLib.inf
 create mode 100644 MdePkg/Library/BaseDebugBootlog/DebugBootlogNull.c

diff --git a/MdePkg/Library/BaseDebugBootlog/BaseDebugBootlogNullLib.inf b/MdePkg/Library/BaseDebugBootlog/BaseDebugBootlogNullLib.inf
new file mode 100644
index 0000000000..0f650f6260
--- /dev/null
+++ b/MdePkg/Library/BaseDebugBootlog/BaseDebugBootlogNullLib.inf
@@ -0,0 +1,26 @@
+## @file
+#  Null Debug library instance for a RAM based boot log.
+#  It provides function stubs for boot log that do nothing.
+#
+#  Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
+#  Copyright (c) 2012, Red Hat, Inc.<BR>
+#  Copyright (c) 2022, Amazon Development Center Germany GmbH. All rights reserved.<BR>
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = BaseDebugBootlogNull
+  FILE_GUID                      = DF934DA3-CD31-49FE-AF50-B3C87C79325F
+  MODULE_TYPE                    = BASE
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = DebugBootlogLib
+
+[Sources]
+  DebugBootlogNull.c
+
+[Packages]
+  MdePkg/MdePkg.dec
diff --git a/MdePkg/Library/BaseDebugBootlog/DebugBootlogNull.c b/MdePkg/Library/BaseDebugBootlog/DebugBootlogNull.c
new file mode 100644
index 0000000000..fbb304e6e2
--- /dev/null
+++ b/MdePkg/Library/BaseDebugBootlog/DebugBootlogNull.c
@@ -0,0 +1,32 @@
+/** @file
+  Null Debug library instance for a RAM based boot log.
+  It provides function stubs for boot log that do nothing.
+
+  Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2012, Red Hat, Inc.<BR>
+  Copyright (c) 2022, Amazon Development Center Germany GmbH.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Base.h>
+
+UINT32
+EFIAPI
+GetDebugBootlogErrorLevel (
+  VOID
+  )
+{
+  return 0;
+}
+
+RETURN_STATUS
+EFIAPI
+DebugBootlogAppend (
+  IN  CONST CHAR8  *String,
+  IN        UINTN  Length,
+  IN        UINTN  ErrorLevel
+  )
+{
+  return RETURN_SUCCESS;
+}
-- 
2.28.0.394.ge197136389




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