Allow stopIPL to be called before istepdispatcher is loaded

Hostboot was crashing because a graceful shutdown was requested
before libistepdisp.so loaded.

Change-Id: Id9206961bcbb72094ff359f26db720b92480f5fb
CQ: SW445973
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/68110
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>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: Christian R. Geddes <crgeddes@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>

2 files changed, 43 insertions, 0 deletions

diff --git a/src/usr/initservice/baseinitsvc/initservice.C b/src/usr/initservice/baseinitsvc/initservice.C
index 8b718716e..33cc46419 100644
--- a/src/usr/initservice/baseinitsvc/initservice.C
+++ b/src/usr/initservice/baseinitsvc/initservice.C
@@ -626,6 +626,7 @@ InitService& InitService::getTheInstance( )
 
 InitService::InitService( ) :
     iv_shutdownInProgress(false),
+    iv_stopIPL(false),
     iv_worst_status(false),
     iv_iStep( 0 ),
     iv_iSubStep( 0 )
@@ -718,6 +719,29 @@ bool InitService::_setShutdownStatus(
     return first;
 }
 
+// External call to stop the IPL
+void stopIpl()
+{
+    // Set the flag to disable istep dispatcher
+    Singleton<InitService>::instance().stopIpl();
+}
+
+void InitService::stopIpl()
+{
+    iv_stopIPL = true;
+}
+
+// External call to grab the stopIpl status
+bool isIplStopped()
+{
+    return Singleton<InitService>::instance().isIplStopped();
+}
+
+bool InitService::isIplStopped()
+{
+    return iv_stopIPL;
+}
+
 void doShutdown(uint64_t i_status,
                 bool i_inBackground,
                 uint64_t i_payload_base,
diff --git a/src/usr/initservice/baseinitsvc/initservice.H b/src/usr/initservice/baseinitsvc/initservice.H
index 356b4b8f8..43f5d9b2e 100644
--- a/src/usr/initservice/baseinitsvc/initservice.H
+++ b/src/usr/initservice/baseinitsvc/initservice.H
@@ -252,6 +252,23 @@ public:
                      uint64_t i_masterHBInstance = THIS_NODE_NO_PAYLOAD,
                      uint32_t i_error_info = 0);
 
+    /**
+     *  @brief Set flag to stop the execution of IPL isteps
+     *
+     *  @note: See the API documentation @
+     *      src/include/usr/initservice/initserviceif.H
+     */
+    void stopIpl();
+
+    /**
+     *  @brief Check if the execution of isteps should stop
+     *  @return true = IPL's istep execution is stopped
+     *
+     *  @note: See the API documentation @
+     *      src/include/usr/initservice/initserviceif.H
+     */
+    bool isIplStopped();
+
 protected:
 
     /**
@@ -323,6 +340,7 @@ private:
                       uint64_t i_masterHBInstance = 0xffffffffffffffffull,
                       uint32_t i_error_info = 0);
 
+
     /**
      * Check and load module associated with this task or function
      *  if necessary.
@@ -367,6 +385,7 @@ private:
 
     mutex_t iv_registryMutex;
     bool iv_shutdownInProgress;
+    bool iv_stopIPL; // flag states if istep execution is stopped
 
     // Worst shutdown status accumulated during shutdown processing
     uint64_t iv_worst_status;