Enable ATTN prior to OPAL handoff

Change-Id: Iadfded90c09b149948348ee462ab34f9c2431982
RTC: 182134
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/49865
Reviewed-by: Matt Derksen <mderkse1@us.ibm.com>
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Reviewed-by: Christian R. Geddes <crgeddes@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: Daniel M. Crowell <dcrowell@us.ibm.com>

8 files changed, 100 insertions, 1 deletions

diff --git a/src/include/arch/ppc.H b/src/include/arch/ppc.H
index a4c3afbed..36b514f04 100644
--- a/src/include/arch/ppc.H
+++ b/src/include/arch/ppc.H
@@ -364,6 +364,13 @@ inline uint64_t getHID()
 }
 
 ALWAYS_INLINE
+inline void setHID(uint64_t _hid)
+{
+    register uint64_t hid = _hid;
+    asm volatile("mtspr 1008, %0; isync" :: "r" (hid));
+}
+
+ALWAYS_INLINE
 inline size_t getCacheLineBytes()
 {
     return 128;
diff --git a/src/include/kernel/syscalls.H b/src/include/kernel/syscalls.H
index 951f55fac..35c6a5fe8 100644
--- a/src/include/kernel/syscalls.H
+++ b/src/include/kernel/syscalls.H
@@ -5,7 +5,7 @@
 /*                                                                        */
 /* OpenPOWER HostBoot Project                                             */
 /*                                                                        */
-/* Contributors Listed Below - COPYRIGHT 2010,2014                        */
+/* Contributors Listed Below - COPYRIGHT 2010,2017                        */
 /* [+] International Business Machines Corp.                              */
 /*                                                                        */
 /*                                                                        */
@@ -93,6 +93,8 @@ namespace Systemcalls
         MISC_CPUSTARTCORE,
             /** cpu_spr_value() */
         MISC_CPUSPRVALUE,
+            /** cpu_spr_set() */
+        MISC_CPUSPRSET,
             /** cpu_nap() - Hidden syscall */
         MISC_CPUNAP,
             /** cpu_master_winkle() */
diff --git a/src/include/sys/misc.h b/src/include/sys/misc.h
index 8255aa3b5..6b57e7e4e 100644
--- a/src/include/sys/misc.h
+++ b/src/include/sys/misc.h
@@ -202,6 +202,13 @@ enum CpuSprNames
  */
 uint64_t cpu_spr_value(CpuSprNames spr);
 
+/** @fn cpu_spr_set
+ *  @brief Writes an SPR.
+ *
+ *  @return rc: true = success,  false = unsupported SPR.
+ */
+uint64_t cpu_spr_set(CpuSprNames spr, uint64_t newValue );
+
 /** @fn cpu_master_winkle
  *  @brief Winkle the master core so runtime SLW image can be applied.
  *
diff --git a/src/include/usr/isteps/istep_reasoncodes.H b/src/include/usr/isteps/istep_reasoncodes.H
index 5895c11ee..1b661f17c 100644
--- a/src/include/usr/isteps/istep_reasoncodes.H
+++ b/src/include/usr/isteps/istep_reasoncodes.H
@@ -125,6 +125,7 @@ namespace ISTEP
         RC_RETURNED_FFDC                         = ISTEP_COMP_ID | 0x34,
         RC_P9N_DD1_NOT_SUPPORTED                 = ISTEP_COMP_ID | 0x35,
         RC_PREVENT_REBOOT_IN_MFG_TERM_MODE       = ISTEP_COMP_ID | 0x36,
+        RC_FAILED_WRITE_SPR                      = ISTEP_COMP_ID | 0x37,
     };
 
 };
diff --git a/src/kernel/syscall.C b/src/kernel/syscall.C
index 5245705d4..c50bae001 100644
--- a/src/kernel/syscall.C
+++ b/src/kernel/syscall.C
@@ -119,6 +119,7 @@ namespace Systemcalls
     void CpuDDLevel(task_t *t);
     void CpuStartCore(task_t *t);
     void CpuSprValue(task_t *t);
+    void CpuSprSet(task_t *t);
     void CpuNap(task_t *t);
     void CpuWinkle(task_t *t);
     void MmAllocBlock(task_t *t);
@@ -160,6 +161,7 @@ namespace Systemcalls
         &CpuDDLevel,  // MISC_CPUDDLEVEL
         &CpuStartCore, // MISC_CPUSTARTCORE
         &CpuSprValue, // MISC_CPUSPRVALUE
+        &CpuSprSet,   // MISC_CPUSPRSET
         &CpuNap, // MISC_CPUNAP
         &CpuWinkle,   // MISC_CPUWINKLE
 
@@ -745,6 +747,26 @@ namespace Systemcalls
         }
     };
 
+    /** Set SPR values. */
+    void CpuSprSet(task_t *t)
+    {
+        uint64_t spr = TASK_GETARG0(t);
+        uint64_t newValue = TASK_GETARG1(t);
+
+        switch (spr)
+        {
+            case CPU_SPR_HID:
+                setHID( newValue );
+                TASK_SETRTN(t, true);
+                break;
+
+            default:
+                // unsupported SPR for write
+                TASK_SETRTN(t, false);
+                break;
+        }
+    };
+
     /**
      *  Allow a task to request privilege escalation to execute the 'nap'
      *  instruction.
diff --git a/src/lib/syscall_misc.C b/src/lib/syscall_misc.C
index fd8d76b62..dff702ddd 100644
--- a/src/lib/syscall_misc.C
+++ b/src/lib/syscall_misc.C
@@ -93,6 +93,14 @@ uint64_t cpu_spr_value(CpuSprNames spr)
         _syscall1(MISC_CPUSPRVALUE, reinterpret_cast<void*>(spr)));
 }
 
+uint64_t cpu_spr_set(CpuSprNames spr, uint64_t newValue)
+{
+    return reinterpret_cast<uint64_t>(
+        _syscall2( MISC_CPUSPRSET,
+                   reinterpret_cast<void*>(spr),
+                   reinterpret_cast<void*>(newValue) ));
+}
+
 int cpu_master_winkle(bool  i_fusedCores)
 {
     task_affinity_pin();
diff --git a/src/usr/isteps/istep21/call_host_start_payload.C b/src/usr/isteps/istep21/call_host_start_payload.C
index 251983324..772011864 100644
--- a/src/usr/isteps/istep21/call_host_start_payload.C
+++ b/src/usr/isteps/istep21/call_host_start_payload.C
@@ -50,6 +50,7 @@
 #include <fapi2/target.H>
 #include <fapi2/plat_hwp_invoker.H>
 #include <p9_cpu_special_wakeup.H>
+#include <p9n2_quad_scom_addresses_fld.H>
 #include <ipmi/ipmiwatchdog.H>
 #include <config.h>
 #include <errno.h>
@@ -466,6 +467,56 @@ errlHndl_t callShutdown ( uint64_t i_masterInstance,
             }
         }
 
+        if ( is_sapphire_load() )
+        {
+            // opal load, Set the ATTN enable bit in the HID register
+            uint64_t  l_enblAttnMask =
+                    0x8000000000000000ull >> P9N2_C_HID_EN_ATTN;
+
+            uint64_t l_curHidVal =  cpu_spr_value( CPU_SPR_HID );
+            uint64_t l_newHidVal = l_curHidVal | l_enblAttnMask;
+
+            uint64_t rc = cpu_spr_set( CPU_SPR_HID, l_newHidVal);
+
+            if ( rc == false )
+            {
+                // Error writing the SPR or
+                // SPR is unsupported/restricted from being written
+                // We will create an error to be passed back.
+                // This will cause the istep to fail.
+                TRACFCOMP( ISTEPS_TRACE::g_trac_isteps_trace,
+                           ERR_MRK"call_host_start_payload()::"
+                                  "callShutdown() -"
+                                  " Write of HID SPR failed" );
+
+                /*@
+                 * @errortype
+                 * @reasoncode       RC_FAILED_WRITE_SPR
+                 * @severity         ERRORLOG::ERRL_SEV_CRITICAL_SYS_TERM
+                 * @moduleid         MOD_START_PAYLOAD_CALL_SHUTDOWN
+                 * @userdata1        current value of HID
+                 * @userdata2        write value attempted to HID
+                 * @devdesc          Write of HID SPR failed
+                 * @custdesc         A problem occurred during the IPL
+                 *                   of the system.
+                 */
+                err =
+                  new ERRORLOG::ErrlEntry( ERRORLOG::ERRL_SEV_CRITICAL_SYS_TERM,
+                                           MOD_START_PAYLOAD_CALL_SHUTDOWN,
+                                           RC_FAILED_WRITE_SPR,
+                                           l_curHidVal,
+                                           l_newHidVal );
+
+                err->collectTrace(ISTEP_COMP_NAME);
+
+                break;
+            }
+        } // end opal load
+        else
+        {
+            // PHYP load, do not enable ATTN
+        }
+
         // do the shutdown.
         TRACFCOMP( ISTEPS_TRACE::g_trac_isteps_trace,
                    "callShutdown finished, shutdown = 0x%x.",
diff --git a/src/usr/isteps/istep21/makefile b/src/usr/isteps/istep21/makefile
index 25ff7be19..c905b60ae 100644
--- a/src/usr/isteps/istep21/makefile
+++ b/src/usr/isteps/istep21/makefile
@@ -25,6 +25,7 @@
 ROOTPATH = ../../../..
 MODULE = istep21
 
+EXTRAINCDIR += ${ROOTPATH}/src/import/chips/p9/common/include/
 EXTRAINCDIR += ${ROOTPATH}/src/import/chips/p9/procedures/hwp/pm/
 EXTRAINCDIR += ${ROOTPATH}/src/import/chips/p9/procedures/hwp/initfiles/
 EXTRAINCDIR += ${ROOTPATH}/src/import/chips/p9/procedures/hwp/ffdc/