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, 57 insertions, 0 deletions

diff --git a/src/usr/secureboot/base/header.C b/src/usr/secureboot/base/header.C
new file mode 100644
index 000000000..00f808e1b
--- /dev/null
+++ b/src/usr/secureboot/base/header.C
@@ -0,0 +1,57 @@
+/* IBM_PROLOG_BEGIN_TAG                                                   */
+/* This is an automatically generated prolog.                             */
+/*                                                                        */
+/* $Source: src/usr/secureboot/base/header.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 "header.H"
+#include <sys/mm.h>
+#include <sys/mmio.h>
+#include <kernel/console.H>
+
+namespace SECUREBOOT
+{
+    void Header::loadBaseHeader()
+    {
+        // Calculate original address of the secureboot header.
+        //      Zero is purposefully not mapped into the VMM tables, so we
+        //      can't use that for the virtual-to-real translation.  Since
+        //      this object is in the base image, EA = HRMOR | PA, so we can
+        //      use PA - EA to find the HRMOR.
+        uint64_t addr = mm_virt_to_phys(this) -
+                            reinterpret_cast<uint64_t>(this);
+        addr -= PAGESIZE;
+
+        // Map in the header.
+        void* origHeader = mm_block_map(reinterpret_cast<void*>(addr),
+                                        PAGESIZE);
+
+        // Copy header to a save area.
+        //     In the future we might want to just extract pieces of the
+        //     header.  The header is important when we start updating
+        //     the TPM PCRs.
+        iv_data = malloc(PAGESIZE);
+        memcpy(iv_data, origHeader, PAGESIZE);
+
+        // Unmap the header.
+        mm_block_unmap(origHeader);
+
+        return;
+    }
+}