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/* $OpenBSD: idprom.c,v 1.6 1997/01/16 04:03:46 kstailey Exp $ */
/* $NetBSD: idprom.c,v 1.13 1996/11/20 18:56:50 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 REGENTS 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/conf.h>
#include <sys/device.h>
#include <machine/autoconf.h>
#include <machine/conf.h>
#include <machine/control.h>
#include <machine/idprom.h>
#include <machine/mon.h>
extern long hostid; /* in kern_sysctl.c */
/*
* This structure is what this driver is all about.
* It is copied from control space early in startup.
*/
struct idprom identity_prom;
int
idpromopen(dev, oflags, devtype, p)
dev_t dev;
int oflags;
int devtype;
struct proc *p;
{
return 0;
}
int
idpromclose(dev, fflag, devtype, p)
dev_t dev;
int fflag;
int devtype;
struct proc *p;
{
return 0;
}
int
idpromread(dev, uio, ioflag)
dev_t dev;
struct uio *uio;
int ioflag;
{
int error, length;
error = 0;
while (uio->uio_resid > 0 && error == 0) {
if (uio->uio_offset >= IDPROM_SIZE)
break; /* past or at end */
length = min(uio->uio_resid,
(IDPROM_SIZE - (int)uio->uio_offset));
error = uiomove((caddr_t) &identity_prom, length, uio);
}
return error;
}
/*
* This is called very early during startup to
* get a copy of the idprom from control space.
*/
int
idprom_init()
{
struct idprom *idp;
char *src, *dst;
int len, x, xorsum;
union {
long l;
char c[4];
} hid;
idp = &identity_prom;
dst = (char*)idp;
src = (char*)IDPROM_BASE;
len = IDPROM_SIZE;
xorsum = 0; /* calculated as xor of data */
do {
x = get_control_byte(src++);
*dst++ = x;
xorsum ^= x;
} while (--len > 0);
if (xorsum != 0) {
mon_printf("idprom_fetch: bad checksum=%d\n", xorsum);
return xorsum;
}
if (idp->idp_format < 1) {
mon_printf("idprom_fetch: bad version=%d\n", idp->idp_format);
return -1;
}
/*
* 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;
return 0;
}
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);
}
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