1 /*
   2  * Copyright (c) 2016, 2017, 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 SHARE_GC_Z_ZPREMAPPEDMEMORY_HPP
  25 #define SHARE_GC_Z_ZPREMAPPEDMEMORY_HPP
  26 
  27 #include "gc/z/zPhysicalMemory.hpp"
  28 #include "gc/z/zVirtualMemory.hpp"
  29 #include "memory/allocation.hpp"
  30 
  31 class ZPage;
  32 
  33 class ZPreMappedMemory {
  34 private:
  35   ZVirtualMemory  _vmem;
  36   ZPhysicalMemory _pmem;
  37   bool            _initialized;
  38 
  39 public:
  40   ZPreMappedMemory(ZVirtualMemoryManager &vmm, ZPhysicalMemoryManager &pmm, size_t size);
  41 
  42   bool is_initialized() const;
  43 
  44   ZPhysicalMemory& physical_memory();
  45   const ZVirtualMemory& virtual_memory() const;
  46 
  47   size_t available() const;
  48 
  49   ZPage* alloc_page(uint8_t type, size_t size);
  50 
  51   void clear();
  52 };
  53 
  54 #endif // SHARE_GC_Z_ZPREMAPPEDMEMORY_HPP