Check for pending OCC messages on HBRT start in OpenPOWER

The OCC will set an interrupt for the Host to look for a pending
message/action.  If opal-prd is not running at the time that this
interrupt happens, HTMGT will never see the message.  Therefore
we need to have HTMGT explicitly check for anything pending any
time HBRT starts up.

Change-Id: Iaae075ae6828a9de5a7bd5afe55c541b0076f2d2
RTC: 187912
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/57356
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP HW <op-hw-jenkins+hostboot@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>

src/include/runtime/interface.h

@@ -983,6 +983,12 @@ struct postInitCalls_t
      */
     void (*callClearPendingSbeMsgs)();
 
+    /**
+     * @brief Clear pending OCC messages
+     *
+     */
+    void (*callClearPendingOccMsgs)();
+
 };
 
 extern hostInterfaces_t* g_hostInterfaces;

src/runtime/rt_main.C

@@ -142,6 +142,17 @@ runtimeInterfaces_t* rt_start(hostInterfaces_t* intf)
     // check for possible missed in-flight messages/interrupts
     rtPost->callClearPendingSbeMsgs();
 
+    // check for possible missed in-flight messages/interrupts
+    if (rtPost->callClearPendingOccMsgs != nullptr )
+    {
+        // vector ptr has been initted, use it
+        rtPost->callClearPendingOccMsgs();
+    }
+    else
+    {
+        // (HTMGT not compiled in by default)
+    }
+
     // do any version mismatch fixups
     rt_version_fixup();
 

src/usr/htmgt/runtime/rt_occ.C

@@ -5,7 +5,7 @@
 /*                                                                        */
 /* OpenPOWER HostBoot Project                                             */
 /*                                                                        */
-/* Contributors Listed Below - COPYRIGHT 2014,2017                        */
+/* Contributors Listed Below - COPYRIGHT 2014,2018                        */
 /* [+] International Business Machines Corp.                              */
 /*                                                                        */
 /*                                                                        */
@@ -158,5 +158,37 @@ namespace HTMGT
     };
 
     registerOcc g_registerOcc;
-}
 
+
+//------------------------------------------------------------------------
+
+    void process_occ_clr_msgs( void )
+    {
+#ifdef CONFIG_HTMGT
+        // a NULL parameter will cause processOccError() to poll
+        //   all of the OCCs (since the parm was invalid)
+        TARGETING::Target * l_DummyOccTarget = nullptr;
+        HTMGT::processOccError(l_DummyOccTarget);
+#else
+        TMGT_ERR("Unexpected call to process_occ_clr_msgs"
+                " when HTMGT is not enabled");
+#endif
+    }
+
+
+    //------------------------------------------------------------------------
+
+    struct registerOccStartup
+    {
+        registerOccStartup()
+        {
+            // Register interface for Host to call
+            postInitCalls_t * rt_post = getPostInitCalls();
+            rt_post->callClearPendingOccMsgs = &process_occ_clr_msgs;
+        }
+
+    };
+
+    registerOccStartup g_registerOccStartup;
+
+} // end namespace HTMGT