317 lines
8.3 KiB
C
317 lines
8.3 KiB
C
/* $NetBSD: boot.c,v 1.7 1999/08/03 07:08:36 tsubai Exp $ */
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/*-
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* Copyright (c) 1997 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 Jason R. Thorpe.
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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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* Copyright (C) 1995, 1996 Wolfgang Solfrank.
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* Copyright (C) 1995, 1996 TooLs GmbH.
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* All rights reserved.
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*
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* ELF support derived from NetBSD/alpha's boot loader, written
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* by Christopher G. Demetriou.
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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 TooLs GmbH.
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* 4. The name of TooLs GmbH may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* First try for the boot code
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*
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* Input syntax is:
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* [promdev[{:|,}partition]]/[filename] [flags]
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*/
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#define ELFSIZE 32 /* We use 32-bit ELF. */
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#include <sys/param.h>
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#include <sys/exec.h>
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#include <sys/exec_elf.h>
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#include <sys/reboot.h>
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#include <sys/disklabel.h>
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#include <lib/libsa/stand.h>
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#include <lib/libsa/loadfile.h>
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#include <lib/libkern/libkern.h>
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#include <machine/cpu.h>
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#include <machine/machine_type.h>
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#include "ofdev.h"
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#include "openfirm.h"
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char bootdev[128];
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char bootfile[128];
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int boothowto;
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int debug;
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static ofw_version = 0;
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static void
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prom2boot(dev)
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char *dev;
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{
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char *cp;
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cp = dev + strlen(dev) - 1;
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for (; *cp; cp--) {
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if (*cp == ':') {
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if (ofw_version < 3) {
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/* sd@0:0 -> sd@0 */
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*cp = 0;
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break;
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} else {
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/* disk@0:5,boot -> disk@0:0 */
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strcpy(cp, ":0");
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break;
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}
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}
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}
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}
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static void
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parseargs(str, howtop)
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char *str;
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int *howtop;
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{
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char *cp;
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/* Allow user to drop back to the PROM. */
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if (strcmp(str, "exit") == 0)
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OF_exit();
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*howtop = 0;
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cp = str;
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if (*cp == '-')
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goto found;
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for (cp = str; *cp; cp++)
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if (*cp == ' ')
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goto found;
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return;
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found:
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*cp++ = 0;
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while (*cp) {
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switch (*cp++) {
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case 'a':
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*howtop |= RB_ASKNAME;
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break;
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case 's':
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*howtop |= RB_SINGLE;
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break;
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case 'd':
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*howtop |= RB_KDB;
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debug = 1;
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break;
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}
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}
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}
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static void
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chain(entry, args, ssym, esym)
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void (*entry)();
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char *args;
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void *ssym, *esym;
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{
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extern char end[];
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int l, machine_tag;
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freeall();
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/*
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* Stash pointer to end of symbol table after the argument
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* strings.
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*/
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l = strlen(args) + 1;
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bcopy(&ssym, args + l, sizeof(ssym));
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l += sizeof(ssym);
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bcopy(&esym, args + l, sizeof(esym));
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l += sizeof(esym);
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/*
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* Tell the kernel we're an OpenFirmware system.
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*/
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machine_tag = POWERPC_MACHINE_OPENFIRMWARE;
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bcopy(&machine_tag, args + l, sizeof(machine_tag));
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l += sizeof(machine_tag);
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OF_chain((void *)RELOC, end - (char *)RELOC, entry, args, l);
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panic("chain");
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}
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__dead void
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_rtt()
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{
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OF_exit();
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}
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void
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main()
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{
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extern char bootprog_name[], bootprog_rev[],
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bootprog_maker[], bootprog_date[];
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int chosen, options, openprom;
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char bootline[512]; /* Should check size? */
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char *cp;
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u_long marks[MARK_MAX];
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u_int32_t entry;
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void *ssym, *esym;
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printf("\n");
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printf(">> %s, Revision %s\n", bootprog_name, bootprog_rev);
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printf(">> (%s, %s)\n", bootprog_maker, bootprog_date);
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/*
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* Figure out what version of Open Firmware...
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*/
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if ((openprom = OF_finddevice("/openprom")) != -1) {
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char model[32];
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bzero(model, sizeof model);
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OF_getprop(openprom, "model", model, sizeof model);
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for (cp = model; *cp; cp++)
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if (*cp >= '0' && *cp <= '9') {
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ofw_version = *cp - '0';
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break;
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}
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#if 0
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printf(">> Open Firmware version %d.x\n", ofw_version);
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#endif
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}
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/*
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* Get the boot arguments from Openfirmware
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*/
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if ((chosen = OF_finddevice("/chosen")) == -1 ||
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OF_getprop(chosen, "bootpath", bootdev, sizeof bootdev) < 0 ||
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OF_getprop(chosen, "bootargs", bootline, sizeof bootline) < 0) {
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printf("Invalid Openfirmware environment\n");
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OF_exit();
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}
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/*
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* Some versions of Openfirmware sets bootpath to "".
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* We use boot-device instead if it occurs.
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*/
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if (bootdev[0] == 0) {
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printf("Cannot use bootpath\n");
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if ((options = OF_finddevice("/options")) == -1 ||
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OF_getprop(options, "boot-device", bootdev,
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sizeof bootdev) < 0) {
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printf("Invalid Openfirmware environment\n");
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OF_exit();
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}
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printf("Using boot-device instead\n");
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}
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prom2boot(bootdev);
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parseargs(bootline, &boothowto);
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for (;;) {
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if (boothowto & RB_ASKNAME) {
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printf("Boot: ");
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gets(bootline);
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parseargs(bootline, &boothowto);
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}
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marks[MARK_START] = 0;
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if (loadfile(bootline, marks, LOAD_ALL) >= 0)
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break;
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if (errno)
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printf("open %s: %s\n", opened_name, strerror(errno));
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boothowto |= RB_ASKNAME;
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}
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#ifdef __notyet__
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OF_setprop(chosen, "bootpath", opened_name, strlen(opened_name) + 1);
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cp = bootline;
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#else
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strcpy(bootline, opened_name);
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cp = bootline + strlen(bootline);
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*cp++ = ' ';
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#endif
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*cp = '-';
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if (boothowto & RB_ASKNAME)
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*++cp = 'a';
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if (boothowto & RB_SINGLE)
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*++cp = 's';
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if (boothowto & RB_KDB)
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*++cp = 'd';
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if (*cp == '-')
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#ifdef __notyet__
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*cp = 0;
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#else
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*--cp = 0;
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#endif
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else
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*++cp = 0;
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#ifdef __notyet__
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OF_setprop(chosen, "bootargs", bootline, strlen(bootline) + 1);
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#endif
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entry = marks[MARK_ENTRY];
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ssym = (void *)marks[MARK_SYM];
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esym = (void *)marks[MARK_END];
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printf(" start=0x%x\n", entry);
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__syncicache((void *)entry, (u_int)ssym - (u_int)entry);
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chain((void *)entry, bootline, ssym, esym);
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OF_exit();
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}
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