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/* $NetBSD: bootxx.c,v 1.2 1996/04/12 06:09:36 cgd Exp $ */
/*
* Copyright (c) 1995 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#include <sys/param.h>
#include <machine/prom.h>
#include "bbinfo.h"
extern _end, start;
struct bbinfoloc desc = {
0xbabefacedeadbeef,
(u_int64_t)&start,
(u_int64_t)&_end,
0xdeadbeeffacebabe
};
int
open_dev(fd)
int *fd;
{
prom_return_t ret;
char devname[64];
int devlen;
/*
* XXX
* We don't know what device names look like yet,
* so we can't change them.
*/
ret.bits = prom_getenv(PROM_E_BOOTED_DEV, devname, sizeof(devname));
devlen = ret.u.retval;
ret.bits = prom_open(devname, devlen);
if (ret.u.status)
return 0;
*fd = ret.u.retval;
return 1;
}
int
load_file(bbinfop, loadaddr)
struct bbinfo *bbinfop;
char *loadaddr;
{
prom_return_t ret;
int32_t cksum, *int32p;
int i, n, fd, rv;
char *cp;
if (bbinfop->nblocks <= 0) {
puts("invalid number of blocks in boot program description\n");
return 0;
}
if (bbinfop->bsize < 4096 || bbinfop->bsize > MAXBSIZE) {
puts("invalid block size in boot program description\n");
return 0;
}
int32p = (int32_t *)&_end;
n = bbinfop->nblocks +
(sizeof(*bbinfop) / sizeof(bbinfop->blocks[0])) - 1;
if ((long)&_end - (long)&start + sizeof(bbinfop->blocks[0]) * n >
15 * 512) {
puts("way too many blocks\n");
return 0;
}
for (i = 0, cksum = 0; i < n; i++)
cksum += *int32p++;
if (cksum != 0) {
puts("invalid checksum in boot program description\n");
return 0;
}
if (!open_dev(&fd)) {
puts("couldn't open disk device\n");
return 0;
}
cp = loadaddr;
rv = 1;
for (i = 0; i < bbinfop->nblocks; i++) {
puts(".");
ret.bits = prom_read(fd, bbinfop->bsize, cp,
bbinfop->blocks[i]);
puts("\b");
if (ret.u.status) {
rv = 0;
puts("BLOCK READ ERROR!\n");
break;
}
cp += bbinfop->bsize;
}
prom_close(fd);
return (rv);
}
void
main()
{
struct bbinfo *bbinfop;
char *loadaddr;
void (*entry) __P((void));
/* Init prom callback vector. */
init_prom_calls();
puts("\nNetBSD/Alpha primary boot...\n");
bbinfop = (struct bbinfo *)&_end;
loadaddr = (char *)SECONDARY_LOAD_ADDRESS;
if (!load_file(bbinfop, loadaddr)) {
puts("\nLOAD FAILED!\n\n");
return;
}
puts("Jumping to entry point...\n");
entry = (void (*)())loadaddr;
(*entry)();
puts("SECONDARY BOOT BLOCK RETURNED!\n");
}
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