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/* $Id: idprom.c,v 1.1.1.1 2004-04-15 01:34:32 phoenix Exp $

 * idprom.c: Routines to load the idprom into kernel addresses and

 *           interpret the data contained within.

 *

 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)

 */

#include <linux/kernel.h>

#include <linux/types.h>

#include <linux/init.h>

#include <asm/oplib.h>

#include <asm/idprom.h>

struct idprom *idprom;

static struct idprom idprom_buffer;

/* Calculate the IDPROM checksum (xor of the data bytes). */

static unsigned char __init calc_idprom_cksum(struct idprom *idprom)

{

        unsigned char cksum, i, *ptr = (unsigned char *)idprom;

        for (i = cksum = 0; i <= 0x0E; i++)

                cksum ^= *ptr++;

        return cksum;

}

/* Create a local IDPROM copy and verify integrity. */

void __init idprom_init(void)

{

        prom_get_idprom((char *) &idprom_buffer, sizeof(idprom_buffer));

        idprom = &idprom_buffer;

        if (idprom->id_format != 0x01)  {

                prom_printf("IDPROM: Warning, unknown format type!\n");

        }

        if (idprom->id_cksum != calc_idprom_cksum(idprom)) {

                prom_printf("IDPROM: Warning, checksum failure (nvram=%x, calc=%x)!\n",

                            idprom->id_cksum, calc_idprom_cksum(idprom));

        }

        printk("Ethernet address: %02x:%02x:%02x:%02x:%02x:%02x\n",

               idprom->id_ethaddr[0], idprom->id_ethaddr[1],

               idprom->id_ethaddr[2], idprom->id_ethaddr[3],

               idprom->id_ethaddr[4], idprom->id_ethaddr[5]);

}