xenia-canary/src/alloy/memory.h

/**
 ******************************************************************************
 * Xenia : Xbox 360 Emulator Research Project                                 *
 ******************************************************************************
 * Copyright 2013 Ben Vanik. All rights reserved.                             *
 * Released under the BSD license - see LICENSE in the root for more details. *
 ******************************************************************************
 */

#ifndef ALLOY_MEMORY_H_
#define ALLOY_MEMORY_H_

#include <alloy/core.h>


namespace alloy {


enum {
  MEMORY_FLAG_64KB_PAGES  = (1 << 1),
  MEMORY_FLAG_ZERO        = (1 << 2),
  MEMORY_FLAG_PHYSICAL    = (1 << 3),
};


class Memory {
public:
  Memory();
  virtual ~Memory();

  inline uint8_t* membase() const { return membase_; }
  inline uint8_t* Translate(uint64_t guest_address) const {
    return membase_ + guest_address;
  };
  inline uint32_t* reserve_address() { return &reserve_address_; }

  virtual int Initialize();

  void Zero(uint64_t address, size_t size);
  void Fill(uint64_t address, size_t size, uint8_t value);
  void Copy(uint64_t dest, uint64_t src, size_t size);

  uint64_t SearchAligned(uint64_t start, uint64_t end,
                         const uint32_t* values, size_t value_count);

  virtual uint64_t HeapAlloc(
      uint64_t base_address, size_t size, uint32_t flags,
      uint32_t alignment = 0x20) = 0;
  virtual int HeapFree(uint64_t address, size_t size) = 0;

  virtual size_t QuerySize(uint64_t base_address) = 0;

  virtual int Protect(uint64_t address, size_t size, uint32_t access) = 0;
  virtual uint32_t QueryProtect(uint64_t address) = 0;

protected:
  size_t    system_page_size_;
  uint8_t*  membase_;
  uint32_t  reserve_address_;
};


}  // namespace alloy


#endif  // ALLOY_MEMORY_H_