diff options
Diffstat (limited to 'sys/boot/i386/libi386/crt/biosdisk_ll.c')
| -rw-r--r-- | sys/boot/i386/libi386/crt/biosdisk_ll.c | 148 |
1 files changed, 0 insertions, 148 deletions
diff --git a/sys/boot/i386/libi386/crt/biosdisk_ll.c b/sys/boot/i386/libi386/crt/biosdisk_ll.c deleted file mode 100644 index b7c77de..0000000 --- a/sys/boot/i386/libi386/crt/biosdisk_ll.c +++ /dev/null @@ -1,148 +0,0 @@ -/* - * $Id$ - * From: $NetBSD: biosdisk_ll.c,v 1.3 1997/06/13 13:36:06 drochner Exp $ - */ - -/* - * Copyright (c) 1996 - * Matthias Drochner. All rights reserved. - * Copyright (c) 1996 - * Perry E. Metzger. 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 acknowledgements: - * This product includes software developed for the NetBSD Project - * by Matthias Drochner. - * This product includes software developed for the NetBSD Project - * by Perry E. Metzger. - * 4. The names of the authors 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. - */ - -/* - * shared by bootsector startup (bootsectmain) and biosdisk.c - * needs lowlevel parts from bios_disk.S - */ - -#include <stand.h> - -#include "biosdisk_ll.h" -#include "diskbuf.h" - -/* XXX prototypes from export header? */ -extern int get_diskinfo(int); -extern int biosread(int, int, int, int, int, char *); - -#define SPT(di) ((di)&0xff) -#define HEADS(di) ((((di)>>8)&0xff)+1) - -int -set_geometry(d) - struct biosdisk_ll *d; -{ - int diskinfo; - - diskinfo = get_diskinfo(d->dev); - - d->spc = (d->spt = SPT(diskinfo)) * HEADS(diskinfo); - - /* - * get_diskinfo assumes floppy if BIOS call fails. Check at least - * "valid" geometry. - */ - return (!d->spc || !d->spt); -} - -/* - * Global shared "diskbuf" is used as read ahead buffer. For reading from - * floppies, the bootstrap has to be loaded on a 64K boundary to ensure that - * this buffer doesn't cross a 64K DMA boundary. - */ -static int ra_dev; -static int ra_end; -static int ra_first; - -int -readsects(d, dblk, num, buf, cold) /* reads ahead if (!cold) */ - struct biosdisk_ll *d; - int dblk, num; - char *buf; - int cold; /* don't use data segment or bss, don't call - * library functions */ -{ - while (num) { - int nsec; - - /* check for usable data in read-ahead buffer */ - if (cold || diskbuf_user != &ra_dev || d->dev != ra_dev - || dblk < ra_first || dblk >= ra_end) { - - /* no, read from disk */ - int cyl, head, sec; - char *trbuf; - - cyl = dblk / d->spc; - head = (dblk % d->spc) / d->spt; - sec = dblk % d->spt; - nsec = d->spt - sec; - - if (cold) { - /* transfer directly to buffer */ - trbuf = buf; - if (nsec > num) - nsec = num; - } else { - /* fill read-ahead buffer */ - trbuf = diskbuf; - if (nsec > diskbuf_size) - nsec = diskbuf_size; - - ra_dev = d->dev; - ra_first = dblk; - ra_end = dblk + nsec; - diskbuf_user = &ra_dev; - } - - if (biosread(d->dev, cyl, head, sec, nsec, trbuf)) { - if (!cold) - diskbuf_user = 0; /* mark invalid */ - return (-1); /* XXX cannot output here if - * (cold) */ - } - } else /* can take blocks from end of read-ahead - * buffer */ - nsec = ra_end - dblk; - - if (!cold) { - /* copy data from read-ahead to user buffer */ - if (nsec > num) - nsec = num; - bcopy(diskbuf + (dblk - ra_first) * BIOSDISK_SECSIZE, - buf, nsec * BIOSDISK_SECSIZE); - } - buf += nsec * BIOSDISK_SECSIZE; - num -= nsec; - dblk += nsec; - } - - return (0); -} |
