171 lines
4.6 KiB
C
171 lines
4.6 KiB
C
/* $NetBSD: idprom.c,v 1.2 1998/02/05 04:57:11 gwr Exp $ */
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/*-
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Adam Glass and Gordon W. Ross.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Machine ID PROM - system type and serial number
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*/
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#include <sys/types.h>
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#include <machine/control.h>
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#include <machine/idprom.h>
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#include <machine/mon.h>
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#include "libsa.h"
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/*
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* This driver provides a soft copy of the IDPROM.
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* It is copied from the device early in startup.
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* Allow these to be patched (helps with poor old
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* Sun3/80 boxes with dead NVRAM).
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*/
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u_char cpu_machine_id = 0;
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struct idprom identity_prom = { 0 };
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int idprom_cksum __P((u_char *));
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void idprom_init3 __P((void));
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void idprom_init3x __P((void));
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int
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idprom_cksum(p)
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u_char *p;
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{
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int len, x;
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len = sizeof(struct idprom);
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x = 0; /* xor of data */
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do x ^= *p++;
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while (--len > 0);
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return (x);
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}
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/* Copy the ethernet address into the passed space. */
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void
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idprom_etheraddr(eaddrp)
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u_char *eaddrp;
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{
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idprom_init();
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bcopy(identity_prom.idp_etheraddr, eaddrp, 6);
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}
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/* Fetch a copy of the idprom. */
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void
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idprom_init()
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{
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if (identity_prom.idp_format == 1)
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return;
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/* Copy the IDPROM contents and do the checksum. */
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if (_is3x)
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idprom_init3x();
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else
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idprom_init3();
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if (identity_prom.idp_format != 1)
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panic("idprom: bad version\n");
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cpu_machine_id = identity_prom.idp_machtype;
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}
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/*
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* Sun3 version:
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* Just copy it from control space.
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*/
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void
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idprom_init3()
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{
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u_char *dst;
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vm_offset_t src; /* control space address */
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int len, x, xorsum;
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/* Copy the IDPROM contents and do the checksum. */
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dst = (u_char *) &identity_prom;
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src = 0; /* XXX */
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len = sizeof(struct idprom);
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do {
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x = get_control_byte(src++);
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*dst++ = x;
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} while (--len > 0);
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x = idprom_cksum((char *) &identity_prom);
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if (x != 0)
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mon_printf("idprom: bad checksum\n");
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}
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/*
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* Sun3X version:
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* Rather than do all the map-in/probe work to find the idprom,
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* we can cheat! We _know_ the monitor already made of copy of
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* the IDPROM in its data page. All we have to do is find it.
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*
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* Yeah, this is sorta gross... This is not needed any longer
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* because netif_sun.c now can use the "advertised" function
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* in 3.x PROMs to get the ethernet address. Let's keep this
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* bit of trickery around for a while anyway, just in case...
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*/
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void
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idprom_init3x()
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{
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u_short *p;
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int x;
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/* Search for it. Range determined empirically. */
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for (p = (u_short *)(SUN3X_MONDATA + 0x0400);
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p < (u_short *)(SUN3X_MONDATA + 0x1c00); p++)
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{
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/* first some quick checks */
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if ((p[0] & 0xfffc) != 0x140)
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continue;
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if (p[1] != 0x0800)
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continue;
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/* Looks plausible. Try the checksum. */
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x = idprom_cksum((u_char *) p);
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if (x == 0)
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goto found;
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}
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panic("idprom: not found in monitor data\n");
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found:
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#ifdef DEBUG
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printf("idprom: copy found at 0x%x\n", (int)p);
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#endif
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bcopy(p, &identity_prom, sizeof(struct idprom));
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}
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