/*

 * Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

#include "precompiled.hpp"

#include "gc/z/zAddress.hpp"

#include "gc/z/zGlobals.hpp"

void ZAddress::set_good_mask(uintptr_t mask) {

  ZAddressGoodMask = mask;

  ZAddressBadMask = ZAddressGoodMask ^ ZAddressMetadataMask;

  ZAddressWeakBadMask = (ZAddressGoodMask | ZAddressMetadataRemapped | ZAddressMetadataFinalizable) ^ ZAddressMetadataMask;

}

void ZAddress::initialize() {

  ZAddressBase = ZPlatformAddressBase();

  ZAddressOffsetBits = ZPlatformAddressOffsetBits();

  ZAddressOffsetMask = (((uintptr_t)1 << ZAddressOffsetBits) - 1) << ZAddressOffsetShift;

  ZAddressOffsetMax = (uintptr_t)1 << ZAddressOffsetBits;

  ZAddressMetadataShift = ZPlatformAddressMetadataShift();

  ZAddressMetadataMask = (((uintptr_t)1 << ZAddressMetadataBits) - 1) << ZAddressMetadataShift;

  ZAddressMetadataMarked0 = (uintptr_t)1 << (ZAddressMetadataShift + 0);

  ZAddressMetadataMarked1 = (uintptr_t)1 << (ZAddressMetadataShift + 1);

  ZAddressMetadataRemapped = (uintptr_t)1 << (ZAddressMetadataShift + 2);

  ZAddressMetadataFinalizable = (uintptr_t)1 << (ZAddressMetadataShift + 3);

  ZAddressMetadataMarked = ZAddressMetadataMarked0;

  set_good_mask(ZAddressMetadataRemapped);

}

void ZAddress::flip_to_marked() {

  ZAddressMetadataMarked ^= (ZAddressMetadataMarked0 | ZAddressMetadataMarked1);

  set_good_mask(ZAddressMetadataMarked);

}

void ZAddress::flip_to_remapped() {

  set_good_mask(ZAddressMetadataRemapped);

}