Add Specialized Constructor for SYSTEM fapi2::Targets

HWP writers are defining SYSTEM fapi2::Targets like this:
   const fapi2::Target<fapi2::TARGET_TYPE_SYSTEM> FAPI_SYSTEM;
Which requires us to implement a specialized constructor to handle
getting the top level system target when this type of constructor is used
To do this we had to delagate the default constructor in fapi2_target.H
to point at the constructor that takes in the plat_target_hndl, also a
specialized template was added to target.H. In the future this specialized
template might move to plat_target.H but this is not yet ready.

Change-Id: I10ea0c4fe05487311c29d5996f1f8baa775fa858
Depends-on: Ia7743dc8d3a83b4be361626b1dea57f39e4dd483
Depends-on: Ib0db5ac2b9b5d5f5c2967ff97794493d867fb04b
Depends-on: I863eb985f74f347a4e46a9c19449c57c70d6adce
RTC:133832
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/22062
Tested-by: Jenkins Server
Reviewed-by: Andrew J. Geissler <andrewg@us.ibm.com>
Tested-by: FSP CI Jenkins
Reviewed-by: William G. Hoffa <wghoffa@us.ibm.com>

1 files changed, 43 insertions, 0 deletions

diff --git a/src/usr/fapi2/target.C b/src/usr/fapi2/target.C
new file mode 100644
index 000000000..ddb1da0a3
--- /dev/null
+++ b/src/usr/fapi2/target.C
@@ -0,0 +1,43 @@
+/* IBM_PROLOG_BEGIN_TAG                                                   */
+/* This is an automatically generated prolog.                             */
+/*                                                                        */
+/* $Source: src/usr/fapi2/target.C $                                      */
+/*                                                                        */
+/* OpenPOWER HostBoot Project                                             */
+/*                                                                        */
+/* Contributors Listed Below - COPYRIGHT 2015,2016                        */
+/* [+] International Business Machines Corp.                              */
+/*                                                                        */
+/*                                                                        */
+/* Licensed under the Apache License, Version 2.0 (the "License");        */
+/* you may not use this file except in compliance with the License.       */
+/* You may obtain a copy of the License at                                */
+/*                                                                        */
+/*     http://www.apache.org/licenses/LICENSE-2.0                         */
+/*                                                                        */
+/* Unless required by applicable law or agreed to in writing, software    */
+/* distributed under the License is distributed on an "AS IS" BASIS,      */
+/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or        */
+/* implied. See the License for the specific language governing           */
+/* permissions and limitations under the License.                         */
+/*                                                                        */
+/* IBM_PROLOG_END_TAG                                                     */
+///
+/// @file target.C
+///
+/// @brief Currently just used to create helper functions for target.H
+///
+///
+
+#include <target.H>
+
+namespace PLAT_TARGET
+{
+
+    void systemTargCtorHelperFunc(fapi2::plat_target_handle_t& io_handle)
+    {
+      TARGETING::targetService().getTopLevelTarget(io_handle);
+    }
+
+
+} //end fapi2 namespace
\ No newline at end of file