p9c_mss_draminit

 -patch set 1 is fapi1

Change-Id: I6ecb800b62e93fd0ee6f0f863f5a71e57ed9b1bb
Original-Change-Id: I0c382341d415593bffd941372b89e9dfb29eaad4
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/32788
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Reviewed-by: ANDRE A. MARIN <aamarin@us.ibm.com>
Reviewed-by: Thi N. Tran <thi@us.ibm.com>
Reviewed-by: Brent Wieman <bwieman@us.ibm.com>
Reviewed-by: Jennifer A. Stofer <stofer@us.ibm.com>
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/45943
Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: Christian R. Geddes <crgeddes@us.ibm.com>

1 files changed, 89 insertions, 0 deletions

diff --git a/src/import/generic/memory/lib/utils/bit_count.H b/src/import/generic/memory/lib/utils/bit_count.H
new file mode 100644
index 000000000..a489f6ea5
--- /dev/null
+++ b/src/import/generic/memory/lib/utils/bit_count.H
@@ -0,0 +1,89 @@
+/* IBM_PROLOG_BEGIN_TAG                                                   */
+/* This is an automatically generated prolog.                             */
+/*                                                                        */
+/* $Source: src/import/generic/memory/lib/utils/bit_count.H $             */
+/*                                                                        */
+/* OpenPOWER HostBoot Project                                             */
+/*                                                                        */
+/* Contributors Listed Below - COPYRIGHT 2015,2017                        */
+/* [+] 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                                                     */
+
+///
+/// @file bit_count.H
+/// @brief count bits
+///
+// *HWP HWP Owner: Brian Silver <bsilver@us.ibm.com>
+// *HWP HWP Backup: Andre Marin <aamarin@us.ibm.com>
+// *HWP Team: Memory
+// *HWP Level: 2
+// *HWP Consumed by: HB:FSP
+
+#ifndef _MSS_BIT_COUNT_H_
+#define _MSS_BIT_COUNT_H_
+
+#include <fapi2.H>
+
+namespace mss
+{
+
+///
+/// @brief Count the bits in a T which are set (1)
+/// @tparam T an integral type. e.g., uint64_t, uint8_t
+/// @param[in] i_value the value to check, count
+/// @return uint64_t the number of bits set in the input
+///
+template< typename T, typename std::enable_if<std::is_integral<T>::value, int>::type = 0>
+inline uint64_t bit_count(const T& i_value)
+{
+    if (i_value == 0)
+    {
+        return 0;
+    }
+    else
+    {
+        return bit_count(i_value >> 1) + (i_value & 0x01);
+    }
+}
+
+///
+/// @brief Return the bit position of the first bit set, from the left
+/// @tparam T, an integral type. e.g., uint64_t, uint8_t
+/// @param[in] i_value the value to check
+/// @return uint64_t the bit position of the first set bit
+/// @bote assumes you checked to make sure there were bits set because it will return 0
+///
+template< typename T, typename std::enable_if<std::is_integral<T>::value, int>::type = 0>
+inline uint64_t first_bit_set(const T& i_value, const uint64_t i_pos = 0)
+{
+    if (i_value == 0)
+    {
+        return 0;
+    }
+
+    if (fapi2::buffer<T>(i_value).template getBit<0>())
+    {
+        return i_pos;
+    }
+    else
+    {
+        return first_bit_set(i_value << 1, i_pos + 1);
+    }
+}
+
+}
+#endif