Read MC Sync Mode from SBE

The SBE boots the system into a specific mode for MC/Nest running
synchronously.  Hostboot needs to detect the mode that we booted
in and set our live copy based on that since it may be out of
sync from what our attribute might say.

Change-Id: I4d7839eb4dd7e40fa045006abfdedc35b16f956c
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/30811
Reviewed-by: Martin Gloff <mgloff@us.ibm.com>
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: Dean Sanner <dsanner@us.ibm.com>
Reviewed-by: Andres A. Lugo-Reyes <aalugore@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>

1 files changed, 44 insertions, 0 deletions

diff --git a/src/usr/sbe/sbe_update.C b/src/usr/sbe/sbe_update.C
index ad1895d95..74f36f5a9 100644
--- a/src/usr/sbe/sbe_update.C
+++ b/src/usr/sbe/sbe_update.C
@@ -4871,5 +4871,49 @@ namespace SBE
         return l_status;
     }
 
+/////////////////////////////////////////////////////////////////////
+    errlHndl_t getBootMcSyncMode( uint8_t& o_mcSyncMode )
+    {
+        errlHndl_t l_err = nullptr;
+        uint64_t l_mboxScratchReg5 = 0;
+
+        INITSERVICE::SPLESS::MboxScratch5_t l_scratch5;
+        size_t l_indexSize = sizeof(l_mboxScratchReg5);
+
+        TARGETING::Target * l_masterProcTarget = NULL;
+        TARGETING::targetService()
+          .masterProcChipTargetHandle( l_masterProcTarget );
+
+        TRACFCOMP( g_trac_sbe, ENTER_MRK"Enter getBootMcSyncMode()");
+        do
+        {
+            l_err = deviceRead( l_masterProcTarget,
+                                &l_mboxScratchReg5,
+                                l_indexSize,
+                                DEVICE_SCOM_ADDRESS(
+                                   INITSERVICE::SPLESS::MBOX_SCRATCH_REG5) );
+
+            if( l_err )
+            {
+                TRACFCOMP(g_trac_sbe,
+                          "getBootMcSyncMode::"
+                          "Failed to get the bucket index from scom address");
+                errlCommit(l_err, SBE_COMP_ID);
+                break;
+            }
+
+            l_scratch5.data32 = static_cast<uint32_t>(l_mboxScratchReg5 >> 32);
 
+
+            TRACFCOMP(g_trac_sbe,
+                      "The MC Sync Bit is %d",
+                      l_scratch5.mcSyncMode );
+
+            o_mcSyncMode = l_scratch5.mcSyncMode;
+
+        } while( 0 );
+        TRACUCOMP(g_trac_sbe,EXIT_MRK "Exit getBootMcSyncMode()");
+
+        return l_err;
+    }
 } //end SBE Namespace