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#ifndef OS_CPU_LINUX_X86_GC_Z_ZPHYSICALMEMORYBACKING_LINUX_X86_HPP
25#define OS_CPU_LINUX_X86_GC_Z_ZPHYSICALMEMORYBACKING_LINUX_X86_HPP
26
27#include "gc/z/zBackingFile_linux_x86.hpp"
28#include "gc/z/zMemory.hpp"
29
30class ZErrno;
31class ZPhysicalMemory;
32
33class ZPhysicalMemoryBacking {
34private:
35 ZBackingFile _file;
36 ZMemoryManager _committed;
37 ZMemoryManager _uncommitted;
38
39 void warn_available_space(size_t max) const;
40 void warn_max_map_count(size_t max) const;
41
42 void map_failed(ZErrno err) const;
43
44 void advise_view(uintptr_t addr, size_t size, int advice) const;
45 void pretouch_view(uintptr_t addr, size_t size) const;
46 void map_view(const ZPhysicalMemory& pmem, uintptr_t addr, bool pretouch) const;
47 void unmap_view(const ZPhysicalMemory& pmem, uintptr_t addr) const;
48
49public:
50 bool is_initialized() const;
51
52 void warn_commit_limits(size_t max) const;
53 bool supports_uncommit();
54
55 size_t commit(size_t size);
56 size_t uncommit(size_t size);
57
58 ZPhysicalMemory alloc(size_t size);
59 void free(const ZPhysicalMemory& pmem);
60
61 uintptr_t nmt_address(uintptr_t offset) const;
62
63 void map(const ZPhysicalMemory& pmem, uintptr_t offset) const;
64 void unmap(const ZPhysicalMemory& pmem, uintptr_t offset) const;
65
66 void debug_map(const ZPhysicalMemory& pmem, uintptr_t offset) const;
67 void debug_unmap(const ZPhysicalMemory& pmem, uintptr_t offset) const;
68};
69
70#endif // OS_CPU_LINUX_X86_GC_Z_ZPHYSICALMEMORYBACKING_LINUX_X86_HPP
71