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, 28 insertions, 0 deletions

diff --git a/src/include/usr/fapi2/target.H b/src/include/usr/fapi2/target.H
index 615677c90..c11454f2f 100644
--- a/src/include/usr/fapi2/target.H
+++ b/src/include/usr/fapi2/target.H
@@ -49,9 +49,37 @@
 #include <targeting/common/commontargeting.H>
 #include <targeting/common/utilFilter.H>
 
+namespace PLAT_TARGET
+{
+///
+/// @brief         Helper function for specialized system target allows
+///                for the constructor to call targetservice::getTopLevel
+/// @param[in/out] io_handle Reference to TARGETING::Target to assign
+///                iv_handle to.
+/// @return void
+///
+void systemTargCtorHelperFunc(fapi2::plat_target_handle_t& io_handle);
+}
+
 namespace fapi2
 {
 
+
+///
+/// @brief         Specialization for TARGET_TYPE_SYSTEM targets
+///                for the constructor to call targetservice::getTopLevel
+/// @param[in/out] io_handle Reference to TARGETING::Target to assign
+///                iv_handle to.
+/// @return void
+///
+/// @note          the default templated constructor is delagated to constructors
+///                take take in a plat_target_handle_t
+///
+template<> inline fapi2::Target<TARGET_TYPE_SYSTEM,  plat_target_handle_t>::Target(plat_target_handle_t v)
+{
+    PLAT_TARGET::systemTargCtorHelperFunc(iv_handle);
+}
+
 ///
 /// @brief Assignment Operator.
 /// @tparam K The type of target of which this is called