Move HOMER BAR to Secure Memory in SMF Mode

This commits enables HOMER BAR to point to the top
of the secure memory on SMF-enabled systems. Consequently,
the HOMER image and hostboot reserved memory will
be moved to the secure memory if SMF is enabled.

Change-Id: I37c7527b06688a41e57f14b4107ff53a507ffae8
RTC: 198825
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/66702
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com>
Reviewed-by: Nicholas E. Bofferding <bofferdn@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>

2 files changed, 104 insertions, 0 deletions

diff --git a/src/include/usr/isteps/istep15list.H b/src/include/usr/isteps/istep15list.H
index f7bc1470c..d32145d0c 100644
--- a/src/include/usr/isteps/istep15list.H
+++ b/src/include/usr/isteps/istep15list.H
@@ -141,6 +141,7 @@ const DepModInfo g_istep15Dependancies = {
         DEP_LIB(libpm.so),
         DEP_LIB(libimageprocs.so),
         DEP_LIB(libisteps_mss.so),
+        DEP_LIB(libsmf.so),
         NULL
     }
 };
diff --git a/src/include/usr/isteps/mem_utils.H b/src/include/usr/isteps/mem_utils.H
new file mode 100644
index 000000000..2ab47d052
--- /dev/null
+++ b/src/include/usr/isteps/mem_utils.H
@@ -0,0 +1,103 @@
+/* IBM_PROLOG_BEGIN_TAG                                                   */
+/* This is an automatically generated prolog.                             */
+/*                                                                        */
+/* $Source: src/include/usr/isteps/mem_utils.H $                          */
+/*                                                                        */
+/* OpenPOWER HostBoot Project                                             */
+/*                                                                        */
+/* Contributors Listed Below - COPYRIGHT 2018                             */
+/* [+] 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 __MEM_UTILS_H
+#define __MEM_UTILS_H
+
+#include <errl/errlentry.H>
+
+namespace ISTEP
+{
+
+/**
+ * @brief Utility function to obtain the highest known address in the system
+ *
+ * @return The highest address in the system in bytes
+ */
+uint64_t get_top_mem_addr();
+
+/**
+ * @brief Utility function to obtain the highest known address in a given proc
+ *
+ * @param[in] i_proc: Proc that we want to calculate the top address for;
+ *                    must not be nullptr or the func will assert
+ *                    must be of TYPE_PROC or the func will assert
+ *
+ * @return The highest address in the given proc (in bytes)
+ */
+uint64_t get_top_mem_addr(const TARGETING::Target* i_proc);
+
+/**
+ * @brief Utility function to obtain the lowest known address in the system
+ *
+ * @return the lowest know address in the system
+ */
+uint64_t get_bottom_mem_addr();
+
+/**
+ * @brief Utility function to obtain the lowest known address in a given proc
+ *
+ * @param[in] i_proc: Proc that we want to calculate the bottom address for;
+ *                    must not be nullptr or the func will assert
+ *                    must be of TYPE_PROC or the func will assert
+ *
+ * @return the lowest know address on the specified proc
+ */
+uint64_t get_bottom_mem_addr(const TARGETING::Target* i_proc);
+
+/**
+ * @brief Utility function to obtain the highest known SMF base address on
+ *        the system.
+ *
+ * @return: the address (in bytes) of the top SMF memory
+ *
+ */
+uint64_t get_top_smf_mem_addr();
+
+/**
+ * @brief Utility function to obtain the SMF base address on the given proc
+ *
+ * @param[in] i_proc: Proc to fetch the SMF BAR from;
+ *                    must not be nullptr or the func will assert
+ *                    must be of TYPE_PROC or the func will assert
+ *
+ *
+ * @return The SMF BAR of the given proc (in bytes)
+ */
+uint64_t get_top_smf_mem_addr(const TARGETING::Target* i_proc);
+
+/**
+ * @brief Utility function to fetch the top of the HOMER memory
+ *
+ * @return the address of the HOMER mem
+ *
+ * @note When SMF is enabled, the highest available SMF BAR will be returned;
+ *       when SMF is disabled, the function behaves exactly like
+ *       get_top_mem_addr
+ */
+uint64_t get_top_homer_mem_addr();
+
+} //namespace ISTEP
+
+#endif