NetBSD-5.0.2/sys/arch/ofppc/stand/ofwboot/boot.c
/* $NetBSD: boot.c,v 1.21 2008/04/28 20:23:31 martin Exp $ */
/*-
* Copyright (c) 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* 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.
*
* 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 FOUNDATION 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.
*/
/*
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
* Copyright (C) 1995, 1996 TooLs GmbH.
* All rights reserved.
*
* ELF support derived from NetBSD/alpha's boot loader, written
* by Christopher G. Demetriou.
*
* 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 TooLs GmbH.
* 4. The name of TooLs GmbH may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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.
*/
/*
* First try for the boot code
*
* Input syntax is:
* [promdev[{:|,}partition]]/[filename] [flags]
*/
#define ELFSIZE 32 /* We use 32-bit ELF. */
#include <sys/param.h>
#include <sys/exec.h>
#include <sys/exec_elf.h>
#include <sys/reboot.h>
#include <sys/disklabel.h>
#include <sys/boot_flag.h>
#include <lib/libsa/stand.h>
#include <lib/libsa/loadfile.h>
#include <lib/libkern/libkern.h>
#include <machine/cpu.h>
#include "boot.h"
#include "ofdev.h"
#include "openfirm.h"
#ifdef DEBUG
# define DPRINTF printf
#else
# define DPRINTF while (/*CONSTCOND*/0) printf
#endif
char bootdev[128];
char bootfile[128];
int boothowto;
int debug;
#ifdef OFWDUMP
void dump_ofwtree(int);
#endif
static char *kernels[] = { "/netbsd.ofppc", "/netbsd",
"/netbsd.gz", "onetbsd", NULL };
static char *kernels64[] = { "/netbsd.ofppc64", "/netbsd64", "/netbsd64.gz",
"onetbsd64", "/netbsd.ofppc", "/netbsd",
"/netbsd.gz", "onetbsd", NULL };
static void
prom2boot(char *dev)
{
char *cp, *ocp;
ocp = dev;
cp = dev + strlen(dev) - 1;
for (; cp >= ocp; cp--) {
if (*cp == ':') {
*cp = '\0';
return;
}
}
}
static void
parseargs(char *str, int *howtop)
{
char *cp;
/* Allow user to drop back to the PROM. */
if (strcmp(str, "exit") == 0)
OF_exit();
if (strcmp(str, "halt") == 0)
OF_exit();
if (strcmp(str, "reboot") == 0)
OF_boot("");
*howtop = 0;
for (cp = str; *cp; cp++)
if (*cp == ' ' || *cp == '-')
goto found;
return;
found:
*cp++ = '\0';
while (*cp)
BOOT_FLAG(*cp++, *howtop);
}
static void
chain(boot_entry_t entry, char *args, void *ssym, void *esym)
{
extern char end[], *cp;
u_int l, magic = 0x19730224;
/*
* Stash pointer to start and end of symbol table after the argument
* strings.
*/
l = strlen(args) + 1;
DPRINTF("ssym @ %p\n", args + l);
memcpy(args + l, &ssym, sizeof(ssym));
l += sizeof(ssym);
DPRINTF("esym @ %p\n", args + l);
memcpy(args + l, &esym, sizeof(esym));
l += sizeof(esym);
DPRINTF("magic @ %p\n", args + l);
memcpy(args + l, &magic, sizeof(magic));
l += sizeof(magic);
DPRINTF("args + l -> %p\n", args + l);
OF_chain((void *) RELOC, end - (char *)RELOC, entry, args, l);
panic("chain");
}
__dead void
_rtt(void)
{
OF_exit();
}
void
main(void)
{
extern char bootprog_name[], bootprog_rev[],
bootprog_maker[], bootprog_date[];
int chosen, options, cpu, cpunode, j, is64=0;
char bootline[512]; /* Should check size? */
char *cp;
u_long marks[MARK_MAX];
u_int32_t entry;
void *ssym, *esym;
printf("\n");
printf(">> %s, Revision %s\n", bootprog_name, bootprog_rev);
printf(">> (%s, %s)\n", bootprog_maker, bootprog_date);
#ifdef OFWDUMP
chosen = OF_finddevice("/");
dump_ofwtree(chosen);
#endif
/*
* Get the boot arguments from Openfirmware
*/
if ((chosen = OF_finddevice("/chosen")) == -1 ||
OF_getprop(chosen, "bootpath", bootdev, sizeof bootdev) < 0 ||
OF_getprop(chosen, "bootargs", bootline, sizeof bootline) < 0) {
printf("Invalid Openfirmware environment\n");
OF_exit();
}
/* lets see if we can guess the 64bittedness */
if (OF_getprop(chosen, "cpu", &cpu, sizeof cpu) == sizeof(cpu)) {
cpunode = OF_instance_to_package(cpu);
if (OF_getprop(cpunode, "64-bit", &j, sizeof j) >= 0) {
is64 = 1;
}
}
prom2boot(bootdev);
parseargs(bootline, &boothowto);
DPRINTF("bootline=%s\n", bootline);
for (;;) {
int i;
if (boothowto & RB_ASKNAME) {
printf("Boot: ");
gets(bootline);
parseargs(bootline, &boothowto);
}
if (bootline[0]) {
kernels[0] = bootline;
kernels[1] = NULL;
}
if (!bootline[0] && is64) {
for (i = 0; kernels64[i]; i++) {
DPRINTF("Trying %s\n", kernels64[i]);
marks[MARK_START] = 0;
if (loadfile(kernels64[i], marks, LOAD_KERNEL) >= 0)
goto loaded;
}
} else {
for (i = 0; kernels[i]; i++) {
DPRINTF("Trying %s\n", kernels[i]);
marks[MARK_START] = 0;
if (loadfile(kernels[i], marks, LOAD_KERNEL) >= 0)
goto loaded;
}
}
boothowto |= RB_ASKNAME;
}
loaded:
#ifdef __notyet__
OF_setprop(chosen, "bootpath", opened_name, strlen(opened_name) + 1);
cp = bootline;
#else
strcpy(bootline, opened_name);
cp = bootline + strlen(bootline);
*cp++ = ' ';
#endif
*cp = '-';
if (boothowto & RB_ASKNAME)
*++cp = 'a';
if (boothowto & RB_SINGLE)
*++cp = 's';
if (boothowto & RB_KDB)
*++cp = 'd';
if (*cp == '-')
#ifdef __notyet__
*cp = 0;
#else
*--cp = 0;
#endif
else
*++cp = 0;
#ifdef __notyet__
OF_setprop(chosen, "bootargs", bootline, strlen(bootline) + 1);
#endif
entry = marks[MARK_ENTRY];
ssym = (void *)marks[MARK_SYM];
esym = (void *)marks[MARK_END];
printf(" start=0x%x\n", entry);
__syncicache((void *) entry, (u_int) ssym - (u_int) entry);
chain((boot_entry_t) entry, bootline, ssym, esym);
OF_exit();
}