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300 lines
7.9 KiB
C
300 lines
7.9 KiB
C
/* $NetBSD: boot.c,v 1.23 2011/01/22 19:19:21 joerg 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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*
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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 <sys/boot_flag.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 "boot.h"
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#include "ofdev.h"
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#include "openfirm.h"
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#ifdef DEBUG
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# define DPRINTF printf
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#else
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# define DPRINTF while (/*CONSTCOND*/0) printf
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#endif
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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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#ifdef OFWDUMP
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void dump_ofwtree(int);
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#endif
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static char *kernels[] = { "/netbsd.ofppc", "/netbsd",
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"/netbsd.gz", "onetbsd", NULL };
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static char *kernels64[] = { "/netbsd.ofppc64", "/netbsd64", "/netbsd64.gz",
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"onetbsd64", "/netbsd.ofppc", "/netbsd",
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"/netbsd.gz", "onetbsd", NULL };
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static void
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prom2boot(char *dev)
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{
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char *cp, *ocp;
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ocp = dev;
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cp = dev + strlen(dev) - 1;
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for (; cp >= ocp; cp--) {
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if (*cp == ':') {
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*cp = '\0';
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return;
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}
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}
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}
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static void
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parseargs(char *str, 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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if (strcmp(str, "halt") == 0)
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OF_exit();
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if (strcmp(str, "reboot") == 0)
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OF_boot("");
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*howtop = 0;
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for (cp = str; *cp; cp++)
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if (*cp == ' ' || *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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BOOT_FLAG(*cp++, *howtop);
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}
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static void
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chain(boot_entry_t entry, char *args, void *ssym, void *esym)
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{
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extern char end[];
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u_int l, magic = 0x19730224;
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/*
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* Stash pointer to start and 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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DPRINTF("ssym @ %p\n", args + l);
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memcpy(args + l, &ssym, sizeof(ssym));
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l += sizeof(ssym);
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DPRINTF("esym @ %p\n", args + l);
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memcpy(args + l, &esym, sizeof(esym));
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l += sizeof(esym);
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DPRINTF("magic @ %p\n", args + l);
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memcpy(args + l, &magic, sizeof(magic));
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l += sizeof(magic);
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DPRINTF("args + l -> %p\n", args + l);
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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(void)
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{
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OF_exit();
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}
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void
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main(void)
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{
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extern char bootprog_name[], bootprog_rev[];
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int chosen, cpu, cpunode, j, is64=0;
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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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#ifdef OFWDUMP
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chosen = OF_finddevice("/");
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dump_ofwtree(chosen);
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#endif
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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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/* lets see if we can guess the 64bittedness */
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if (OF_getprop(chosen, "cpu", &cpu, sizeof cpu) == sizeof(cpu)) {
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cpunode = OF_instance_to_package(cpu);
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if (OF_getprop(cpunode, "64-bit", &j, sizeof j) >= 0) {
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is64 = 1;
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}
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}
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prom2boot(bootdev);
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parseargs(bootline, &boothowto);
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DPRINTF("bootline=%s\n", bootline);
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for (;;) {
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int i;
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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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if (bootline[0]) {
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kernels[0] = bootline;
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kernels[1] = NULL;
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}
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if (!bootline[0] && is64) {
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for (i = 0; kernels64[i]; i++) {
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DPRINTF("Trying %s\n", kernels64[i]);
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marks[MARK_START] = 0;
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if (loadfile(kernels64[i], marks, LOAD_KERNEL) >= 0)
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goto loaded;
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}
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} else {
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for (i = 0; kernels[i]; i++) {
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DPRINTF("Trying %s\n", kernels[i]);
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marks[MARK_START] = 0;
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if (loadfile(kernels[i], marks, LOAD_KERNEL) >= 0)
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goto loaded;
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}
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}
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boothowto |= RB_ASKNAME;
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}
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loaded:
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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((boot_entry_t) entry, bootline, ssym, esym);
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OF_exit();
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}
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