OvmfPkg: Add CSM16 and related drivers if CSM_ENABLE is set

Note: The CSM16 binary must be copied into the tree at
OvmfPkg/Csm/Csm16/Csm16.bin in order to use CSM_ENABLE.

If CSM_ENABLE is set during the build, then the CSM16 binary
and the CSM support (Legacy BIOS) drivers will be added to
the build.

Signed-off-by: jljusten
Reviewed-by: geekboy15a

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12682 6f19259b-4bc3-4df7-8a09-765794883524

OvmfPkg/Csm/Csm16/Csm16.inf

@@ -0,0 +1,23 @@
+## @file
+#  CSM Binary
+#
+#  Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
+#  This program and the accompanying materials
+#  are licensed and made available under the terms and conditions of the BSD License
+#  which accompanies this distribution.  The full text of the license may be found at
+#  http://opensource.org/licenses/bsd-license.php
+#
+#  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = Csm16
+  FILE_GUID                      = 1547B4F3-3E8A-4FEF-81C8-328ED647AB1A
+  MODULE_TYPE                    = USER_DEFINED
+  VERSION_STRING                 = 1.0
+
+[Binaries]
+  BIN|Csm16.bin|*

OvmfPkg/Csm/Csm16/ReadMe.txt

@@ -0,0 +1,12 @@
+This module allows a CSM16 binary to be easily included
+in the OVMF.fd output file.
+
+=== How to use Csm16.inf ===
+
+1. Copy the CSM16 binary to OvmfPkg/Csm/Csm16/Csm16.bin
+2. Build OVMF with CSM_ENABLE defined.
+
+   For example:
+   * build -D CSM_ENABLE, or
+   * OvmfPkg/build.sh -D CSM_ENABLE
+