Secureboot memory layout support.

    * Start kernel in 1/4 cache mode per Secureboot.
    * Copy Secureboot header for base image for later use.
    * Blind-purge bottom half of cache.
    * Add bottom of cache into memory maps for 1/2 cache mode.

RTC: 64762
Change-Id: I1b45f30a2d45c9709d4fd486cfe0ca2ce86b051c
Reviewed-on: http://gfw160.austin.ibm.com:8080/gerrit/3773
Reviewed-by: Michael Baiocchi <baiocchi@us.ibm.com>
Tested-by: Jenkins Server
Reviewed-by: ADAM R. MUHLE <armuhle@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>
Reviewed-by: A. Patrick Williams III <iawillia@us.ibm.com>

1 files changed, 68 insertions, 0 deletions

diff --git a/src/usr/secureboot/base/service.C b/src/usr/secureboot/base/service.C
new file mode 100644
index 000000000..bb18bef9f
--- /dev/null
+++ b/src/usr/secureboot/base/service.C
@@ -0,0 +1,68 @@
+/* IBM_PROLOG_BEGIN_TAG                                                   */
+/* This is an automatically generated prolog.                             */
+/*                                                                        */
+/* $Source: src/usr/secureboot/base/service.C $                           */
+/*                                                                        */
+/* IBM CONFIDENTIAL                                                       */
+/*                                                                        */
+/* COPYRIGHT International Business Machines Corp. 2013                   */
+/*                                                                        */
+/* p1                                                                     */
+/*                                                                        */
+/* Object Code Only (OCO) source materials                                */
+/* Licensed Internal Code Source Materials                                */
+/* IBM HostBoot Licensed Internal Code                                    */
+/*                                                                        */
+/* The source code for this program is not published or otherwise         */
+/* divested of its trade secrets, irrespective of what has been           */
+/* deposited with the U.S. Copyright Office.                              */
+/*                                                                        */
+/* Origin: 30                                                             */
+/*                                                                        */
+/* IBM_PROLOG_END_TAG                                                     */
+#include <secureboot/service.H>
+#include <stdint.h>
+#include <sys/mm.h>
+#include <util/singleton.H>
+#include <secureboot/secure_reasoncodes.H>
+
+#include "settings.H"
+#include "header.H"
+#include "purge.H"
+
+namespace SECUREBOOT
+{
+    void* initializeBase(void* unused)
+    {
+        errlHndl_t l_errl = NULL;
+
+        do
+        {
+            // Load original secureboot header.
+            if (enabled())
+            {
+                Singleton<Header>::instance().loadBaseHeader();
+            }
+
+            // Blind-purge lower portion of cache.
+            l_errl = issueBlindPurge();
+            if (l_errl)
+            {
+                break;
+            }
+
+            // Extend memory footprint into lower portion of cache.
+            //   This can only fail is someone has already called to extend
+            //   to post-secureboot state.  Major coding bug, so just assert.
+            assert(0 == mm_extend(MM_EXTEND_POST_SECUREBOOT));
+
+        } while(0);
+
+        return l_errl;
+    }
+
+    bool enabled()
+    {
+        return Singleton<Settings>::instance().getEnabled();
+    }
+}