NetBSD/sys/arch/sparc/stand/bootxx/bootxx.c

164 lines
4.7 KiB
C

/* $NetBSD: bootxx.c,v 1.8 2000/03/13 23:52:33 soren Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Paul Kranenburg.
*
* 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 NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 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.
*/
#include <sys/param.h>
#include <sys/time.h>
#include <sys/exec.h>
#include <lib/libsa/stand.h>
#include <machine/promlib.h>
#include <sparc/stand/common/promdev.h>
int debug;
int netif_debug;
/*
* Boot device is derived from ROM provided information.
*/
const char progname[] = "bootxx";
struct open_file io;
/*
* The contents of the block_* variables below is set by installboot(8)
* to hold the filesystem data of the second-stage boot program
* (typically `/boot'): filesystem block size, # of filesystem
* blocks and the block numbers themselves.
*/
#define MAXBLOCKNUM 256 /* enough for a 2MB boot program (bs 8K) */
int32_t block_size = 0;
int32_t block_count = MAXBLOCKNUM;
daddr_t block_table[MAXBLOCKNUM] = { 0 };
int main __P((void));
void loadboot __P((struct open_file *, caddr_t));
int
main()
{
char *dummy;
void (*entry)__P((void *)) = (void (*)__P((void *)))PROM_LOADADDR;
void *arg;
#ifdef HEAP_VARIABLE
{
extern char end[];
setheap((void *)ALIGN(end), (void *)0xffffffff);
}
#endif
prom_init();
prom_bootdevice = prom_getbootpath();
io.f_flags = F_RAW;
if (devopen(&io, 0, &dummy)) {
panic("%s: can't open device `%s'", progname,
prom_bootdevice != NULL ? prom_bootdevice : "unknown");
}
(void)loadboot(&io, (caddr_t)PROM_LOADADDR);
(io.f_dev->dv_close)(&io);
arg = (prom_version() == PROM_OLDMON) ? (caddr_t)PROM_LOADADDR : romp;
(*entry)(arg);
_rtt();
}
void
loadboot(f, addr)
struct open_file *f;
char *addr;
{
int i;
char *buf;
size_t n;
daddr_t blk;
/*
* Allocate a buffer that we can map into DVMA space; only
* needed for sun4 architecture, but use it for all machines
* to keep code size down as much as possible.
*/
buf = alloc(block_size);
if (buf == NULL)
panic("%s: alloc failed", progname);
for (i = 0; i < block_count; i++) {
if ((blk = block_table[i]) == 0)
panic("%s: block table corrupt", progname);
#ifdef DEBUG
printf("%s: block # %d = %d\n", progname, i, blk);
#endif
if ((f->f_dev->dv_strategy)(f->f_devdata, F_READ,
blk, block_size, buf, &n)) {
printf("%s: read failure", progname);
_rtt();
}
bcopy(buf, addr, block_size);
if (n != block_size)
panic("%s: short read", progname);
if (i == 0) {
int m = N_GETMAGIC(*(struct exec *)addr);
if (m == ZMAGIC || m == NMAGIC || m == OMAGIC) {
/* Move exec header out of the way */
bcopy(addr, addr - sizeof(struct exec), n);
addr -= sizeof(struct exec);
}
}
addr += n;
}
}
/*
* We don't need the overlap handling feature that the libkern version
* of bcopy() provides. We DO need code compactness..
*/
void
bcopy(src, dst, n)
const void *src;
void *dst;
size_t n;
{
const char *p = src;
char *q = dst;
while (n-- > 0)
*q++ = *p++;
}