eeprom_nm24c09_layout.h

MIPS下的boottloader yamon 的源代码

#ifndef EEPROM_NM24C09_LAYOUT_H
#define EEPROM_NM24C09_LAYOUT_H

/************************************************************************
 *
 *      EEPROM_NM24C09_LAYOUT.h
 *
 *      The 'EEPROM_NM24C09_LAYOUT' module defines the variable layout
 *      of the NM24C09 eeprom.
 *
 *
 *
 * ######################################################################
 *
 * Copyright (c) 1999-2000 MIPS Technologies, Inc. All rights reserved. 
 * 
 * Unpublished rights reserved under the Copyright Laws of the United States of 
 * America. 
 * 
 * This document contains information that is proprietary to MIPS Technologies, 
 * Inc. ("MIPS Technologies"). Any copying, modifying or use of this information 
 * (in whole or in part) which is not expressly permitted in writing by MIPS 
 * Technologies or a contractually-authorized third party is strictly 
 * prohibited. At a minimum, this information is protected under unfair 
 * competition laws and the expression of the information contained herein is 
 * protected under federal copyright laws. Violations thereof may result in 
 * criminal penalties and fines. 
 * MIPS Technologies or any contractually-authorized third party reserves the 
 * right to change the information contained in this document to improve 
 * function, design or otherwise. MIPS Technologies does not assume any 
 * liability arising out of the application or use of this information. Any 
 * license under patent rights or any other intellectual property rights owned 
 * by MIPS Technologies or third parties shall be conveyed by MIPS Technologies 
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 * between the parties. 
 * The information contained in this document constitutes one or more of the 
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 * Acquisition Regulation Supplement 227.7202 for military agencies. The use of 
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 * contractually-authorized third party. 
 *
 ************************************************************************/




/************************************************************************
 *    Include files
 ************************************************************************/

#include "sysdefs.h"

/************************************************************************
 *   Variable layout of the 1024 bytes NM24C09 EEPROM device
*************************************************************************/


/* The upper 512 bytes EEPROM memory is write protected */
#define EEPROM_COM_EN0_BASE	      512


/* Layout of EEPROM */
typedef struct
{
    /* Layout of eeprom depends on version field */
    UINT8 version;
#define EEPROM_VERSION_1	1

    /* Number of fields */
    UINT8 count;

    /*  Fields may be placed in any order.
     *  Each field consists of the following :
     * 
     *  1) A byte containing a unique ID.
     *  2) A byte containing the number of bytes of data to follow.
     *  3) An array of bytes (length given above) containing the actual
     *     data (MSB first).
     */

    /*  Mac address (Mandatory on platforms with Ethernet support) 
     *  Format : Binary (6 bytes) 
     */
    UINT8 id_mac;
#define EEPROM_ID_MAC		1
    UINT8 len_mac;
#define EEPROM_LEN_MAC		6
    UINT8 mac_field[EEPROM_LEN_MAC];

    /*  Serial number (Mandatory on all platforms) 
     *  Format : BCD (10 digits -> 5 bytes).
     */
    UINT8 id_sn;
#define EEPROM_ID_SN		2
    UINT8 len_sn;
#define EEPROM_LEN_SN		5
    UINT8 sn_field[EEPROM_LEN_SN];

    /* Checksum consists of a byte calculated as the modulo 256 sum of
     * all used bytes of the eeprom from the version field up to, but
     * not including, the csum field.
     */

    UINT8 csum;
}
t_eeprom_layout;

#endif /* #ifndef EEPROM_NM24C09_LAYOUT_H */