1 /*
   2  * Copyright (c) 2015, 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 OS_CPU_SOLARIS_SPARC_ZPHYSICALMEMORYBACKING_SOLARIS_SPARC_HPP
  25 #define OS_CPU_SOLARIS_SPARC_ZPHYSICALMEMORYBACKING_SOLARIS_SPARC_HPP
  26 
  27 #include "gc/z/zMemory.hpp"
  28 #include "memory/allocation.hpp"
  29 
  30 class ZErrno;
  31 class ZPhysicalMemory;
  32 
  33 class ZPhysicalMemoryBacking VALUE_OBJ_CLASS_SPEC {
  34 private:
  35   const size_t _granule_size;
  36   bool         _initialized;
  37 
  38   bool initialize_vamask() const;
  39   bool initialize_osm() const;
  40   bool initialize_anonymous() const;
  41 
  42   void map_osm(ZPhysicalMemory pmem, uintptr_t offset) const;
  43   void unmap_osm(ZPhysicalMemory pmem, uintptr_t offset) const;
  44 
  45   void advise_anonymous(uintptr_t addr, size_t size) const;
  46   void map_anonymous(ZPhysicalMemory pmem, uintptr_t offset) const;
  47   void unmap_anonymous(ZPhysicalMemory pmem, uintptr_t offset) const;
  48 
  49 public:
  50   ZPhysicalMemoryBacking(size_t max_capacity, size_t granule_size);
  51 
  52   bool is_initialized() const;
  53 
  54   bool expand(size_t from, size_t to);
  55   ZPhysicalMemory alloc(size_t size);
  56   void free(ZPhysicalMemory pmem);
  57 
  58   uintptr_t nmt_address(uintptr_t offset) const;
  59 
  60   void map(ZPhysicalMemory pmem, uintptr_t offset) const;
  61   void unmap(ZPhysicalMemory pmem, uintptr_t offset) const;
  62   void flip(ZPhysicalMemory pmem, uintptr_t offset) const;
  63 };
  64 
  65 #endif // OS_CPU_SOLARIS_SPARC_ZPHYSICALMEMORYBACKING_SOLARIS_SPARC_HPP