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.inline.hpp"
26#include "gc/z/zGranuleMap.inline.hpp"
27#include "gc/z/zPage.inline.hpp"
28#include "gc/z/zPageTable.inline.hpp"
29#include "runtime/orderAccess.hpp"
30#include "utilities/debug.hpp"
31
32ZPageTable::ZPageTable() :
33 _map() {}
34
35void ZPageTable::insert(ZPage* page) {
36 const uintptr_t addr = ZAddress::good(page->start());
37 const size_t size = page->size();
38
39 // Make sure a newly created page is
40 // visible before updating the page table.
41 OrderAccess::storestore();
42
43 assert(get(addr) == NULL, "Invalid entry");
44 _map.put(addr, size, page);
45}
46
47void ZPageTable::remove(ZPage* page) {
48 const uintptr_t addr = ZAddress::good(page->start());
49 const size_t size = page->size();
50
51 assert(get(addr) == page, "Invalid entry");
52 _map.put(addr, size, NULL);
53}
54