MemoryRegion.h

/*
 * Copyright (c) 2008-2014, Pedigree Developers
 *
 * Please see the CONTRIB file in the root of the source tree for a full
 * list of contributors.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
#ifndef KERNEL_PROCESSOR_MEMORYREGION_H
#define KERNEL_PROCESSOR_MEMORYREGION_H
 
#include "pedigree/kernel/compiler.h"
#include "pedigree/kernel/processor/types.h"
 
class EXPORTED_PUBLIC MemoryRegion {
  friend class X86CommonPhysicalMemoryManager;
  friend class HostedPhysicalMemoryManager;
  friend class Arm64PhysicalMemoryManager;
  friend class Armv7PhysicalMemoryManager;
 
 public:
  MemoryRegion(const char* pName);
  virtual ~MemoryRegion();
 
  void free();
 
  void* virtualAddress() const;
  physical_uintptr_t physicalAddress() const;
  size_t size() const;
  const char* name() const;
 
  operator bool() const;
 
  bool physicalBoundsCheck(physical_uintptr_t address);
  template <typename T>
  T* convertPhysicalPointer(physical_uintptr_t address);
 
  void setNonRamMemory(bool b);
  bool getNonRamMemory();
  void setForced(bool b);
  bool getForced();
  void setAnonymous(bool b);
  bool getAnonymous() const;
 
 private:
  MemoryRegion(const MemoryRegion&);
  MemoryRegion& operator=(const MemoryRegion&);
 
  void* m_VirtualAddress;
  physical_uintptr_t m_PhysicalAddress;
  size_t m_Size;
  const char* m_pName;
 
  bool m_bNonRamMemory, m_bForced, m_bPageBacked, m_bAnonymous;
};
 
template <typename T>
T* MemoryRegion::convertPhysicalPointer(physical_uintptr_t address) {
  return reinterpret_cast<T*>(reinterpret_cast<uintptr_t>(m_VirtualAddress) +
                              (address - m_PhysicalAddress));
}
 
#endif