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/* $NetBSD: idprom.c,v 1.10 1995/02/11 20:57:11 gwr Exp $ */
/*
* Copyright (c) 1993 Adam Glass
* All rights reserved.
*
* 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 Adam Glass.
* 4. The name of the authors may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``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 AUTHORS 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 <machine/autoconf.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;
static int idprom_match __P((struct device *, void *vcf, void *args));
static void idprom_attach __P((struct device *, struct device *, void *));
struct cfdriver idpromcd = {
NULL, "idprom", idprom_match, idprom_attach,
DV_DULL, sizeof(struct device), 0 };
int idprom_match(parent, vcf, args)
struct device *parent;
void *vcf, *args;
{
struct cfdata *cf = vcf;
/* This driver only supports one unit. */
if (cf->cf_unit != 0)
return (0);
return (1);
}
void idprom_attach(parent, self, args)
struct device *parent;
struct device *self;
void *args;
{
struct idprom *idp;
union {
long l;
char c[4];
} id;
/*
* Construct the hostid from the idprom contents.
* This appears to be the way SunOS does it.
*/
idp = &identity_prom;
id.c[0] = idp->idp_machtype;
id.c[1] = idp->idp_serialnum[0];
id.c[2] = idp->idp_serialnum[1];
id.c[3] = idp->idp_serialnum[2];
hostid = id.l;
printf(" hostid 0x%x\n", id.l);
}
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;
}
idpromread(dev, uio, ioflag)
dev_t dev;
struct uio *uio;
int ioflag;
{
int error, unit, 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;
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;
}
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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