physmem.hh

来自「Source code for an Numeric Cmputer」· HH 代码 · 共 77 行

/********************************************************************
* Description: physmem.hh
*   Provides the member functions for the PHYSMEM_HANDLE class. This
*   is a C++ interface for portable access to physical memory.
*
*   Derived from a work by Fred Proctor & Will Shackleford
*
* Author:
* License: LGPL Version 2
* System: Linux
*    
* Copyright (c) 2004 All rights reserved.
*
* Last change: 
* $Revision: 1.6 $
* $Author: paul_c $
* $Date: 2005/05/23 16:34:10 $
********************************************************************/

#ifndef PHYSMEM_HH
#define PHYSMEM_HH


#ifdef  __cplusplus
extern "C" {
#endif
#include <stddef.h>		/* size_t */

#ifdef __cplusplus
}
#endif
typedef char *LOCAL_ADDRESS_TYPE;

class PHYSMEM_HANDLE {
  public:
    PHYSMEM_HANDLE();		/* Constructor for blank handle. */

    /* Constructor to access memory starting at _physical_address, for _size
       bytes. Some platform implementations distinguish between various types 
       of addresses using the address code. */
    PHYSMEM_HANDLE(unsigned long _physical_address,
	long _address_code, long _size);

      virtual ~ PHYSMEM_HANDLE();	/* Destructor */

    long offset;		/* Operations read and write work use offset */
    long size;
    int read(void *_to, long _read_size);	/* Read _read_size bytes and
						   store */
    /* at _to */
    int write(void *_from, long _write_size);	/* Write _write_size bytes */
    /* using data at _from */

    void set_to_ptr(void *_ptr, long size);	/* Use the physical memory at 
						   _ptr. */

    long address_code;		/* Platform specific address type code. */
    /* (See vme.h for VXWORKS) */

    void memsetf(long offset, char _byte, long _memset_size);
    int clear_memory();
    int valid();
    int isvalid;
    char *temp_buf;
    unsigned long physical_address;
    LOCAL_ADDRESS_TYPE local_address;
  protected:

  public:

    int using_bit3;
    double total_bytes_moved;
    int enable_byte_counting;
};

#endif