1 /*
   2  * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * Copyright 2009 Red Hat, Inc.
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This code is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  25 
  26 #include "precompiled.hpp"
  27 #include "assembler_zero.inline.hpp"
  28 #include "memory/resourceArea.hpp"
  29 #include "runtime/java.hpp"
  30 #include "runtime/stubCodeGenerator.hpp"
  31 #include "vm_version_zero.hpp"
  32 
  33 
  34 void VM_Version::initialize() {
  35   // This machine does not allow unaligned memory accesses
  36   if (! FLAG_IS_DEFAULT(UseUnalignedAccesses)) {
  37     warning("Unaligned memory access is not available on this CPU");
  38     FLAG_SET_DEFAULT(UseUnalignedAccesses, false);
  39   }
  40   // Disable prefetching for Zero
  41   if (! FLAG_IS_DEFAULT(AllocatePrefetchDistance)) {
  42     warning("Prefetching is not available for a Zero VM");
  43   }
  44   FLAG_SET_DEFAULT(AllocatePrefetchDistance, 0);
  45 }