Checkstop detection during IPL SBE steps

Check for system checkstop on failure of IPL SBE steps

Change-Id: I8b10e2d21a2cf3ea0c53974cd4cc98fa88bb4912
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/51708
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: RAJA DAS <rajadas2@in.ibm.com>
Reviewed-by: Sachin Gupta <sgupta2m@in.ibm.com>

3 files changed, 36 insertions, 5 deletions

diff --git a/src/sbefw/core/ipl.C b/src/sbefw/core/ipl.C
index 02e2b2f3..d817be60 100644
--- a/src/sbefw/core/ipl.C
+++ b/src/sbefw/core/ipl.C
@@ -28,6 +28,9 @@
 #include "sbeFFDC.H"
 
 #include "ipl.H"
+#include "sbeglobals.H"
+
+#include "p9n2_perv_scom_addresses.H"
 
 using namespace fapi2;
 
@@ -40,12 +43,26 @@ uint64_t G_ring_save[8] = {0, 0, 0, 0, 0, 0, 0, 0};
 // SBE FFDC.
 fapi2::ReturnCode g_iplFailRc = FAPI2_RC_SUCCESS;
 
+bool isSystemCheckstop()
+{
+    bool checkstop = false;
+    fapi2::buffer<uint64_t> attnReg = 0;
+    ReturnCode fapiRc = FAPI2_RC_SUCCESS;
+    plat_target_handle_t hndl;
+    fapiRc = getscom_abs_wrap(&hndl,
+                              P9N2_PERV_ATTN_INTERRUPT_REG,
+                              attnReg.pointer());
+    if( fapiRc == FAPI2_RC_SUCCESS )
+    {
+        checkstop = attnReg.getBit<2>();
+    }
+    return checkstop;
+}
+
 //----------------------------------------------------------------------------
 // @note This is the responsibilty of caller to verify major/minor
 //       number before calling this function
 
-// @TODO via RTC 129077.
-// This function should check for system checkstop as well.
 ReturnCode sbeExecuteIstep (const uint8_t i_major, const uint8_t i_minor)
 {
     #define SBE_FUNC "sbeExecuteIstep "
@@ -78,7 +95,7 @@ ReturnCode sbeExecuteIstep (const uint8_t i_major, const uint8_t i_minor)
     else
     {
         (void)SbeRegAccess::theSbeRegAccess().updateSbeStep(i_major, i_minor);
-    } 
+    }
 
     return rc;
     #undef SBE_FUNC
@@ -106,14 +123,18 @@ void sbeDoContinuousIpl()
                 {
                     rc = istepMap->istepWrapper(istepMap->istepHwp);
                 }
-                if(rc != FAPI2_RC_SUCCESS)
+                bool checkstop = isSystemCheckstop();
+                if((rc != FAPI2_RC_SUCCESS) || checkstop )
                 {
                     SBE_ERROR(SBE_FUNC"Failed istep execution in plck mode: "
                             "Major: %d, Minor: %d",
                             istepTableEntry->istepMajorNum, step);
 
+                    uint32_t secRc = checkstop ? SBE_SEC_SYSTEM_CHECKSTOP:
+                                        SBE_SEC_GENERIC_FAILURE_IN_EXECUTION;
+
                     captureAsyncFFDC(SBE_PRI_GENERIC_EXECUTION_FAILURE,
-                                     SBE_SEC_GENERIC_FAILURE_IN_EXECUTION);
+                                     secRc);
                     // exit outer loop as well
                     entry = istepTable.len;
                     break;
diff --git a/src/sbefw/core/ipl.H b/src/sbefw/core/ipl.H
index 3a2b1395..f56c3dc9 100644
--- a/src/sbefw/core/ipl.H
+++ b/src/sbefw/core/ipl.H
@@ -6,6 +6,7 @@
 /* OpenPOWER sbe Project                                                  */
 /*                                                                        */
 /* Contributors Listed Below - COPYRIGHT 2017,2018                        */
+/* [+] International Business Machines Corp.                              */
 /*                                                                        */
 /*                                                                        */
 /* Licensed under the Apache License, Version 2.0 (the "License");        */
@@ -48,6 +49,14 @@ fapi2::ReturnCode sbeExecuteIstep (uint8_t i_major, uint8_t i_minor);
  */
 void sbeDoContinuousIpl();
 
+/*
+ * @brief Check for the system checkstop based on
+ *        P9N2_PERV_ATTN_INTERRUPT_REG bit 3
+ *
+ * @return if the system is checkstop or not
+ */
+bool isSystemCheckstop();
+
 using voidfuncptr_t = void (*)(void);
 using iStep_t = fapi2::ReturnCode (*)( voidfuncptr_t );
 
diff --git a/src/sbefw/core/sbe_sp_intf.H b/src/sbefw/core/sbe_sp_intf.H
index 45c293d7..4b6c7704 100644
--- a/src/sbefw/core/sbe_sp_intf.H
+++ b/src/sbefw/core/sbe_sp_intf.H
@@ -220,6 +220,7 @@ enum sbeSecondaryResponse
     SBE_SEC_INVALID_PARAMS                    = 0x19,
     SBE_SEC_BLACKLISTED_CHIPOP_ACCESS         = 0x20,
     SBE_SEC_DMT_TIMEOUT                       = 0x21,
+    SBE_SEC_SYSTEM_CHECKSTOP                  = 0x22,
 };
 
 /**