1 /* 2 * Copyright (c) 2019, 2020, 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_BSD_GC_Z_ZPHYSICALMEMORYBACKING_BSD_HPP 25 #define OS_BSD_GC_Z_ZPHYSICALMEMORYBACKING_BSD_HPP 26 27 class ZPhysicalMemoryBacking { 28 private: 29 uintptr_t _base; 30 bool _initialized; 31 32 bool commit_inner(size_t offset, size_t length) const; 33 34 public: 35 ZPhysicalMemoryBacking(size_t max_capacity); 36 37 bool is_initialized() const; 38 39 void warn_commit_limits(size_t max_capacity) const; 40 41 size_t commit(size_t offset, size_t length) const; 42 size_t uncommit(size_t offset, size_t length) const; 43 44 bool map(uintptr_t addr, size_t size, uintptr_t offset) const; 45 void unmap(uintptr_t addr, size_t size) const; 46 }; 47 48 #endif // OS_BSD_GC_Z_ZPHYSICALMEMORYBACKING_BSD_HPP