1 /* 2 * Copyright (c) 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_BSD_GC_Z_ZPHYSICALMEMORYBACKING_BSD_HPP 25 #define OS_BSD_GC_Z_ZPHYSICALMEMORYBACKING_BSD_HPP 26 27 #include "gc/z/zBackingFile_bsd.hpp" 28 #include "gc/z/zMemory.hpp" 29 30 class ZPhysicalMemory; 31 32 class ZPhysicalMemoryBacking { 33 private: 34 ZBackingFile _file; 35 ZMemoryManager _committed; 36 ZMemoryManager _uncommitted; 37 38 void pretouch_view(uintptr_t addr, size_t size) const; 39 void map_view(const ZPhysicalMemory& pmem, uintptr_t addr) const; 40 void unmap_view(const ZPhysicalMemory& pmem, uintptr_t addr) const; 41 42 public: 43 bool is_initialized() const; 44 45 void warn_commit_limits(size_t max) const; 46 bool supports_uncommit(); 47 48 size_t commit(size_t size); 49 size_t uncommit(size_t size); 50 51 ZPhysicalMemory alloc(size_t size); 52 void free(const ZPhysicalMemory& pmem); 53 54 uintptr_t nmt_address(uintptr_t offset) const; 55 56 void pretouch(uintptr_t offset, size_t size) const; 57 58 void map(const ZPhysicalMemory& pmem, uintptr_t offset) const; 59 void unmap(const ZPhysicalMemory& pmem, uintptr_t offset) const; 60 61 void debug_map(const ZPhysicalMemory& pmem, uintptr_t offset) const; 62 void debug_unmap(const ZPhysicalMemory& pmem, uintptr_t offset) const; 63 }; 64 65 #endif // OS_BSD_GC_Z_ZPHYSICALMEMORYBACKING_BSD_HPP