Function to set Nest Frequency based off DIMM memory capability

-Needed for 32x32GB DIMM support
-Finds max capable frequency of system and all present DIMMs
 and deconfigures any DIMM that cannot run at desired frequency
-If necessary, Sets Nest Freq and triggers SBE update

Change-Id: I9bba92f55f1b67ff4a15d79113f19d39272ec72d
RTC:122884
Depends-on:I1dca7196cd02a2704a238665b73b522c9e103936
Reviewed-on: http://gfw160.aus.stglabs.ibm.com:8080/gerrit/17829
Tested-by: Jenkins Server
Tested-by: Jenkins OP Build CI
Tested-by: FSP CI Jenkins
Tested-by: Jenkins OP HW
Reviewed-by: A. Patrick Williams III <iawillia@us.ibm.com>

1 files changed, 17 insertions, 1 deletions

diff --git a/src/include/util/algorithm.H b/src/include/util/algorithm.H
index 54baa029d..dac0f47c9 100644
--- a/src/include/util/algorithm.H
+++ b/src/include/util/algorithm.H
@@ -5,7 +5,9 @@
 /*                                                                        */
 /* OpenPOWER HostBoot Project                                             */
 /*                                                                        */
-/* COPYRIGHT International Business Machines Corp. 2012,2014              */
+/* Contributors Listed Below - COPYRIGHT 2012,2015                        */
+/* [+] 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.       */
@@ -52,6 +54,20 @@ namespace Util
             static const T value = (a > b) ? a : b;
         };
 
+        /**
+         * @brief - utility function that determines if a given number is
+         *          power of 2.
+         *
+         * @param[in] i_num - given number.
+         *
+         * @return bool - True if the number is a power of 2, False otherwise.
+         */
+        template <typename T>
+        bool isPow2(T i_num)
+        {
+            return (!(i_num & (i_num-1)));
+        }
+
     };
 };
 #endif