NetBSD/sys/arch/sun3x/dev/idprom.c

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/* $NetBSD: idprom.c,v 1.4 1997/04/28 23:43:56 gwr Exp $ */
/*-
* Copyright (c) 1996 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Adam Glass and Gordon W. Ross.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Machine ID PROM - system type and serial number
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <machine/autoconf.h>
#include <machine/idprom.h>
#include <machine/obio.h>
#include <machine/machdep.h>
#include <machine/mon.h>
/*
* This structure is what this driver is all about.
* It is copied from the device early in startup.
*/
struct idprom identity_prom;
static u_long idprom_pa;
static int idprom_match __P((struct device *, struct cfdata *, void *));
static void idprom_attach __P((struct device *, struct device *, void *));
struct cfattach idprom_ca = {
sizeof(struct device), idprom_match, idprom_attach
};
struct cfdriver idprom_cd = {
NULL, "idprom", DV_DULL
};
/*
* Find the IDPROM and copy it to memory.
* This is called early during startup,
* but late enough so peek_byte() works.
* Called by machdep.c:identifycpu()
*/
void
idprom_init()
{
struct idprom *idp;
u_char *src, *dst;
caddr_t va;
u_long pa;
int len, x, xorsum;
union {
long l;
char c[4];
} hid;
/* First, probe for a separate IDPROM (3/470). */
pa = OBIO_IDPROM1;
va = obio_find_mapping(pa, IDPROM_SIZE);
if (peek_byte(va) == -1) {
/* IDPROM is in the EEPROM */
pa = OBIO_IDPROM2;
va = obio_find_mapping(pa, IDPROM_SIZE);
}
/* Save the phys. address for idprom_match. */
idprom_pa = pa;
/* Copy the IDPROM contents and do the checksum. */
idp = &identity_prom;
dst = (u_char *) idp;
src = (u_char *) va;
len = IDPROM_SIZE;
xorsum = 0; /* calculated as xor of data */
do {
x = *src++;
*dst++ = x;
xorsum ^= x;
} while (--len > 0);
if (xorsum != 0)
printf("idprom: bad checksum=%d\n", xorsum);
if (idp->idp_format < 1)
printf("idprom: bad version=%d\n", idp->idp_format);
/*
* Construct the hostid from the idprom contents.
* This appears to be the way SunOS does it.
*/
hid.c[0] = idp->idp_machtype;
hid.c[1] = idp->idp_serialnum[0];
hid.c[2] = idp->idp_serialnum[1];
hid.c[3] = idp->idp_serialnum[2];
hostid = hid.l;
}
static int
idprom_match(parent, cf, args)
struct device *parent;
struct cfdata *cf;
void *args;
{
struct confargs *ca = args;
/* This driver only supports one unit. */
if (cf->cf_unit != 0)
return (0);
/* Match the address we determined earlier. */
if (ca->ca_paddr != idprom_pa)
return (0);
return (1);
}
static void
idprom_attach(parent, self, args)
struct device *parent;
struct device *self;
void *args;
{
printf("\n");
}
void
idprom_etheraddr(eaddrp)
u_char *eaddrp;
{
u_char *src, *dst;
int len = 6;
src = identity_prom.idp_etheraddr;
dst = eaddrp;
do *dst++ = *src++;
while (--len > 0);
}