NetBSD/sys/arch/pc532/stand/boot.c

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/* $NetBSD: boot.c,v 1.4 1995/08/29 21:55:41 phil Exp $ */
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/*-
* Copyright (c) 1982, 1986, 1990, 1993
* The Regents of the University of California. 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 the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
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* @(#)boot.c 8.1 (Berkeley) 6/10/93
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*/
#ifndef lint
static char rcsid[] = "$NetBSD: boot.c,v 1.4 1995/08/29 21:55:41 phil Exp $";
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#endif /* not lint */
#include <sys/param.h>
#include <sys/reboot.h>
#include <a.out.h>
#include "stand.h"
#include "samachdep.h"
/*
* Boot program... bits in `howto' determine whether boot stops to
* ask for system name. Boot device is derived from ROM provided
* information.
*/
extern unsigned opendev;
extern int noconsole;
extern int testing;
char *ssym, *esym;
char *name;
char *names[] = {
"/netbsd", "/onetbsd", "/netbsd.old",
};
#define NUMNAMES (sizeof(names)/sizeof(char *))
static int bdev, bctlr, bunit, bpart;
main()
{
int currname = 0;
int io;
cninit();
scsiinit();
printf("\n>> NetBSD BOOT pc532 [$Revision: 1.4 $]\n");
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bdev = B_TYPE(bootdev);
bctlr = B_CONTROLLER(bootdev);
bunit = B_UNIT(bootdev);
bpart = B_PARTITION(bootdev);
for (;;) {
name = names[currname++];
if (currname == NUMNAMES)
currname = 0;
if (!noconsole) {
howto = 0;
getbootdev(&howto);
}
else
printf(": %s\n", name);
io = open(name, 0);
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if (io >= 0) {
copyunix(howto, opendev, io);
close(io);
}
else
printf("boot: %s\n", strerror(errno));
}
}
/*ARGSUSED*/
copyunix(howto, devtype, io)
register int howto; /* boot flags */
register u_int devtype; /* boot device */
register int io;
{
struct exec x;
int i;
register char *load; /* load addr for unix */
register char *addr;
char *file;
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int dev, ctlr, unit, part;
/* XXX use devtype? */
dev = B_TYPE(opendev);
ctlr = B_CONTROLLER(opendev);
unit = B_UNIT(opendev);
part = B_PARTITION(opendev);
/* get the file name part of name */
devparse(name, &i, &i, &i, &i, &i, &file);
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i = read(io, (char *)&x, sizeof(x));
if (i != sizeof(x) || N_BADMAG(x)) {
printf("Bad format\n");
return;
}
load = addr = (char *)(x.a_entry & 0x00ffff00); /* XXX make less magical? */
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printf("Booting %s%d%c:%s @ 0x%x\n",
devsw[dev].dv_name, unit + (8*ctlr), 'a' + part, file, addr);
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if (testing) {
load = addr = alloc(2*1024*1024); /* XXX stat the file? */
if (!addr) {
printf("alloc failed\n");
exit(1);
}
}
/* Text */
printf("%d", x.a_text);
if (N_GETMAGIC(x) == ZMAGIC && lseek(io, 0, SEEK_SET) == -1)
goto shread;
if (read(io, (char *)addr, x.a_text) != x.a_text)
goto shread;
addr += x.a_text;
if (N_GETMAGIC(x) == NMAGIC)
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while ((int)addr & CLOFSET)
*addr++ = 0;
/* Data */
printf("+%d", x.a_data);
if (read(io, addr, x.a_data) != x.a_data)
goto shread;
addr += x.a_data;
/* Bss */
printf("+%d", x.a_bss);
bzero( addr, x.a_bss );
addr += x.a_bss;
/* Symbols */
ssym = addr;
bcopy(&x.a_syms, addr, sizeof(x.a_syms));
addr += sizeof(x.a_syms);
printf(" [%d+", x.a_syms);
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if (x.a_syms && read(io, addr, x.a_syms) != x.a_syms)
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goto shread;
addr += x.a_syms;
/* read size of string table */
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i = 0;
if (x.a_syms && read(io, &i, sizeof(int)) != sizeof(int))
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goto shread;
/* read strings */
printf("%d]", i);
bcopy(&i, addr, sizeof(int));
if (i) {
i -= sizeof(int);
addr += sizeof(int);
if (read(io, addr, i) != i)
goto shread;
addr += i;
}
#define round_to_size(x,t) \
(((int)(x) + sizeof(t) - 1) & ~(sizeof(t) - 1))
esym = (char *)round_to_size(addr - load,int);
#undef round_to_size
/* and note the end address of all this */
printf(" total=0x%x", addr);
x.a_entry &= 0xffffff;
printf(" start 0x%x\n", x.a_entry);
#ifdef DEBUG
printf("ssym=0x%x esym=0x%x\n", ssym, esym);
printf("\n\nReturn to boot...\n");
getchar();
#endif
if (!testing) {
#ifdef __GNUC__
/* do NOT change order!!
* the following are passed as args, and are in registers
* clobbered by the last two movd's!!!
*/
asm(" movd %0,r5" : : "g" (load));
asm(" movd %0,r6" : : "g" (devtype));
asm(" movd %0,r7" : : "g" (howto));
/* magic value for locore.s to look for (3253232532) */
asm(" movd %0,r3" : : "i" (0xc1e86394));
asm(" movd %0,r4" : : "g" (esym));
#endif /* __GNUC__ */
(*((int (*)()) x.a_entry))();
}
return;
shread:
printf("Short read\n");
return;
}
char line[100];
getbootdev(howto)
int *howto;
{
char c, *ptr = line;
printf("Boot: [[[%s%d%c:]%s][-abdrs]] :- ",
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devsw[bdev].dv_name, bunit + (8 * bctlr), 'a'+bpart, name);
if (tgets(line)) {
while (c = *ptr) {
while (c == ' ')
c = *++ptr;
if (!c)
return;
if (c == '-')
while ((c = *++ptr) && c != ' ')
switch (c) {
case 'a':
*howto |= RB_ASKNAME;
continue;
case 'b':
*howto |= RB_HALT;
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continue;
case 'd':
*howto |= RB_KDB;
continue;
case 'r':
*howto |= RB_DFLTROOT;
continue;
case 's':
*howto |= RB_SINGLE;
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continue;
}
else {
name = ptr;
while ((c = *++ptr) && c != ' ');
if (c)
*ptr++ = 0;
}
}
} else
printf("\n");
}