FSPless continous tracing support

  - Updated trace daemon to output trace buf addr, size to
    mbox scratch 1, 2
  - Moved enable disable of continous trace to "istep" control
  - Updated istep tool to dump traces to file and commandline

Change-Id: I2d9f48f5ed9878591ff9ab45fa18a98fc286ac1f
RTC:127346
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/24565
Tested-by: Jenkins Server
Reviewed-by: Christian R. Geddes <crgeddes@us.ibm.com>
Tested-by: FSP CI Jenkins
Reviewed-by: Prachi Gupta <pragupta@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>

2 files changed, 113 insertions, 0 deletions

diff --git a/src/include/usr/isteps/spless_255list.H b/src/include/usr/isteps/spless_255list.H
new file mode 100644
index 000000000..5bfca668a
--- /dev/null
+++ b/src/include/usr/isteps/spless_255list.H
@@ -0,0 +1,100 @@
+/* IBM_PROLOG_BEGIN_TAG                                                   */
+/* This is an automatically generated prolog.                             */
+/*                                                                        */
+/* $Source: src/include/usr/isteps/spless_255list.H $                     */
+/*                                                                        */
+/* OpenPOWER HostBoot Project                                             */
+/*                                                                        */
+/* Contributors Listed Below - COPYRIGHT 2012,2016                        */
+/* [+] International Business Machines Corp.                              */
+/*                                                                        */
+/*                                                                        */
+/* Licensed under the Apache License, Version 2.0 (the "License");        */
+/* you may not use this file except in compliance with the License.       */
+/* You may obtain a copy of the License at                                */
+/*                                                                        */
+/*     http://www.apache.org/licenses/LICENSE-2.0                         */
+/*                                                                        */
+/* Unless required by applicable law or agreed to in writing, software    */
+/* distributed under the License is distributed on an "AS IS" BASIS,      */
+/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or        */
+/* implied. See the License for the specific language governing           */
+/* permissions and limitations under the License.                         */
+/*                                                                        */
+/* IBM_PROLOG_END_TAG                                                     */
+#ifndef __ISTEPS_SPLESS_255LIST_H
+#define __ISTEPS_SPLESS_255LIST_H
+
+/**
+ * @file    spless_255list.H
+ *
+ *  This file DOES NOT contain real isteps.  It contains control "isteps"
+ *  for the SP Less communication/control path
+ *
+ *  Please see the note in initsvcstructs.H for description of
+ *      the ISTEPNAME macro.
+ *
+ */
+
+#include    <initservice/initsvcstructs.H>
+#include    <initservice/initsvcreasoncodes.H>
+#include <config.h>
+
+
+/**
+ * The following isteps are not used as normal isteps, but instead
+ * are for SPless communication/control of Hostboot.  This is "weird"
+ * as it is not the normal use of isteps, but it takes advantage of
+ * an existing communication path, without adding a lot of extra
+ * code into hostboot.
+ *
+ * NOTE: These isteps are NEVER used for mainline boot and are only
+ * used for FSP Less communication
+ */
+
+namespace   INITSERVICE
+{
+
+    // These constants are used by HB to handle the out of band
+    // "isteps".  Note that the actual numbers must be in the
+    // Task info list so they get properly parsed into the
+    // isteplist.csv file
+    const   uint8_t     CONTROL_ISTEP          =   0xFF;
+    const   uint8_t     CTL_CONT_TRACE_DISABLE =   0x00;
+    const   uint8_t     CTL_CONT_TRACE_ENABLE  =   0x01;
+    const   uint8_t     FLUSH_TRACE_BUFS       =   0x02;
+
+
+    const   TaskInfo    g_istep255[]  =   {
+        {
+                ISTEPNAME(255,0, "cont_trace_disable"),
+                NULL,
+                { NONE, EXT_IMAGE, IPL_NOOP, false }
+        },
+        {
+                ISTEPNAME(255,1, "cont_trace_enable"),
+                NULL,
+                { NONE, EXT_IMAGE, IPL_NOOP, false }
+        },
+        {
+                ISTEPNAME(255,2, "flush_trace_bufs"),
+                NULL,
+                { NONE, EXT_IMAGE, IPL_NOOP, false }
+        },
+};
+
+const DepModInfo g_istep255Dependancies = {
+    {
+        NULL
+    }
+};
+
+const ExtTaskInfo g_istep255TaskList = {
+    &(g_istep255[0]),
+    ( sizeof(g_istep255)/sizeof(TaskInfo) ),
+    &g_istep255Dependancies
+};
+
+};  // end namespace
+
+#endif
diff --git a/src/include/usr/trace/trace.H b/src/include/usr/trace/trace.H
index d01003650..c934d18e7 100644
--- a/src/include/usr/trace/trace.H
+++ b/src/include/usr/trace/trace.H
@@ -181,6 +181,19 @@ namespace TRACE
      */
     void flushBuffers();
 
+#ifndef __HOSTBOOT_RUNTIME
+    /**
+     *  @brief  Enable Continuous trace mode
+     *          no-op for runtime
+     */
+    void enableContinousTrace();
+
+    /**
+     *  @brief  Disable Continuous trace mode
+     *          no-op for runtime
+     */
+    void disableContinousTrace();
+#endif
     /**
      *  @brief Return if debug trace is enabled for input trace descriptor
      *