1/*
2 * Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24#include "precompiled.hpp"
25#include "gc/z/zAddress.hpp"
26#include "gc/z/zGlobals.hpp"
27
28void ZAddress::set_good_mask(uintptr_t mask) {
29 ZAddressGoodMask = mask;
30 ZAddressBadMask = ZAddressGoodMask ^ ZAddressMetadataMask;
31 ZAddressWeakBadMask = (ZAddressGoodMask | ZAddressMetadataRemapped | ZAddressMetadataFinalizable) ^ ZAddressMetadataMask;
32}
33
34void ZAddress::initialize() {
35 ZAddressSpaceStart = ZPlatformAddressSpaceStart();
36 ZAddressSpaceEnd = ZPlatformAddressSpaceEnd();
37 ZAddressSpaceSize = ZAddressSpaceEnd - ZAddressSpaceStart;
38
39 ZAddressReservedStart = ZPlatformAddressReservedStart();
40 ZAddressReservedEnd = ZPlatformAddressReservedEnd();
41 ZAddressReservedSize = ZAddressReservedEnd - ZAddressReservedStart;
42
43 ZAddressBase = ZPlatformAddressBase();
44
45 ZAddressOffsetBits = ZPlatformAddressOffsetBits();
46 ZAddressOffsetMask = (((uintptr_t)1 << ZAddressOffsetBits) - 1) << ZAddressOffsetShift;
47 ZAddressOffsetMax = (uintptr_t)1 << ZAddressOffsetBits;
48
49 ZAddressMetadataShift = ZPlatformAddressMetadataShift();
50 ZAddressMetadataMask = (((uintptr_t)1 << ZAddressMetadataBits) - 1) << ZAddressMetadataShift;
51
52 ZAddressMetadataMarked0 = (uintptr_t)1 << (ZAddressMetadataShift + 0);
53 ZAddressMetadataMarked1 = (uintptr_t)1 << (ZAddressMetadataShift + 1);
54 ZAddressMetadataRemapped = (uintptr_t)1 << (ZAddressMetadataShift + 2);
55 ZAddressMetadataFinalizable = (uintptr_t)1 << (ZAddressMetadataShift + 3);
56
57 ZAddressMetadataMarked = ZAddressMetadataMarked0;
58 set_good_mask(ZAddressMetadataRemapped);
59}
60
61void ZAddress::flip_to_marked() {
62 ZAddressMetadataMarked ^= (ZAddressMetadataMarked0 | ZAddressMetadataMarked1);
63 set_good_mask(ZAddressMetadataMarked);
64}
65
66void ZAddress::flip_to_remapped() {
67 set_good_mask(ZAddressMetadataRemapped);
68}
69