diff options
Diffstat (limited to 'sys/arch/sun3/stand/tapeboot/boot.c')
| -rw-r--r-- | sys/arch/sun3/stand/tapeboot/boot.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/sys/arch/sun3/stand/tapeboot/boot.c b/sys/arch/sun3/stand/tapeboot/boot.c new file mode 100644 index 00000000000..c6a24287299 --- /dev/null +++ b/sys/arch/sun3/stand/tapeboot/boot.c @@ -0,0 +1,166 @@ +/* $NetBSD: boot.c,v 1.1.1.1 1995/10/13 21:27:30 gwr Exp $ */ + +/* + * Copyright (c) 1994 Paul Kranenburg + * 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 Paul Kranenburg. + * 4. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. + */ + +/* + * This is a generic "first-stage" boot program. + * + * Note that this program has absolutely no filesystem knowledge! + * + * Instead, this uses a table of disk block numbers that are + * filled in by the installboot program such that this program + * can load the "second-stage" boot program. + */ + +#include <sys/param.h> +#include <sys/reboot.h> +#include <sys/exec.h> + +#include <machine/mon.h> + +#include "stand.h" +#include "promboot.h" + +/* + * Boot device is derived from ROM provided information. + */ +#define LOADADDR 0x4000 + +extern int debug; +extern char *version; + +char line[80]; + +int block_size = 512; + + +main() +{ + struct open_file f; + struct bootparam *bp; + void (*entry)(); + char *addr; + int n, error; + + printf(">> NetBSD tapeboot [%s]\n", version); + prom_get_boot_info(); + + /* + * Set the tape file number to the next one, because + * the boot program is first, then the kernel. + */ + bp = *romp->bootParam; + bp->partNum += 1; + + for (;;) { + if (prom_boothow & RB_ASKNAME) { + printf("tapeboot: segment? [%d] ", bp->partNum); + gets(line); + if (('0' <= line[0]) && (line[0] <= '9')) { + bp->partNum = line[0] - '0'; + } + } + + printf("tapeboot: opening segment %d\n", bp->partNum); + f.f_flags = F_RAW; + if ((error = devopen(&f, 0, &addr)) != 0) { + printf("tapeboot: open failed, error=%d\n", error); + goto ask; + } + + addr = (char*)LOADADDR; + error = loadfile(&f, addr); + + printf("tapeboot: close (rewind)...\n"); + f.f_dev->dv_close(&f); + if (error == 0) + break; + + printf("tapeboot: load failed, error=%d\n", error); + ask: + prom_boothow |= RB_ASKNAME; + } + + if (debug) { + printf("Debug mode - enter c to continue..."); + /* This will print "\nAbort at ...\n" */ + asm(" trap #0"); + } + + printf("Starting program at 0x%x\n", (long)addr); + entry = (void (*)())addr; + (*entry)(); +} + +int +loadfile(fp, addr) + struct open_file *fp; + char *addr; +{ + char *buf; + int n, blknum; + int error = 0; + /* + * Loading a kernel. It WILL have an a.out header. + * XXX - This assumes OMAGIC format! + */ + addr -= sizeof(struct exec); /* XXX */ + + /* Need to use a buffer that can be mapped into DVMA space. */ + buf = alloc(block_size); + if (!buf) + panic("tapeboot: alloc failed"); + + printf("tapeboot: loading ... "); + /* limit program size to < 2MB */ + for (blknum = 0; blknum < 4096; blknum++) { + + error = (fp->f_dev->dv_strategy)(fp->f_devdata, F_READ, + blknum, block_size, buf, &n); + if (error) { + printf("(error=%d)\n", error); + return EIO; + } + if (n == 0) + break; /* end of tape */ + if (n != block_size) { + printf(" (short read)\n"); + return EIO; + } + + bcopy(buf, addr, block_size); + addr += block_size; + } + + printf("(%d blocks)\n", blknum); + return 0; +} + |