mem: Add support for a security bit in the memory system

This patch adds the basic building blocks required to support e.g. ARM
TrustZone by discerning secure and non-secure memory accesses.

1 files changed, 15 insertions, 2 deletions

diff --git a/src/mem/cache/blk.cc b/src/mem/cache/blk.cc
index 4952ed758..210304dbf 100644
--- a/src/mem/cache/blk.cc
+++ b/src/mem/cache/blk.cc
@@ -1,4 +1,16 @@
 /*
+ * Copyright (c) 2012-2013 ARM Limited
+ * All rights reserved
+ *
+ * The license below extends only to copyright in the software and shall
+ * not be construed as granting a license to any other intellectual
+ * property including but not limited to intellectual property relating
+ * to a hardware implementation of the functionality of the software
+ * licensed hereunder.  You may use the software subject to the license
+ * terms below provided that you ensure that this notice is replicated
+ * unmodified and in its entirety in all distributions of the software,
+ * modified or unmodified, in source code or in binary form.
+ *
  * Copyright (c) 2007 The Regents of The University of Michigan
  * All rights reserved.
  *
@@ -33,9 +45,10 @@ void
 CacheBlkPrintWrapper::print(std::ostream &os, int verbosity,
                             const std::string &prefix) const
 {
-    ccprintf(os, "%sblk %c%c%c\n", prefix,
+    ccprintf(os, "%sblk %c%c%c%c\n", prefix,
              blk->isValid()    ? 'V' : '-',
              blk->isWritable() ? 'E' : '-',
-             blk->isDirty()    ? 'M' : '-');
+             blk->isDirty()    ? 'M' : '-',
+             blk->isSecure()   ? 'S' : '-');
 }