Purely cosmetic whitespace/indentation changes (mmm, indent(1))
This commit is contained in:
thorpej
parent
ddf4bc9113
commit
5e82fddd43
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@ -1,4 +1,4 @@
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/* $NetBSD: biosdisk.c,v 1.2 1997/03/22 01:33:10 thorpej Exp $ */
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/* $NetBSD: biosdisk.c,v 1.3 1997/03/22 01:41:34 thorpej Exp $ */
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/*
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* Copyright (c) 1996
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@ -32,11 +32,10 @@
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*
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*/
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/* raw BIOS disk device for libsa.
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needs lowlevel parts from bios_disk.S and biosdisk_ll.c
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partly from netbsd:sys/arch/i386/boot/disk.c
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no bad144 handling!
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/*
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* raw BIOS disk device for libsa. needs lowlevel parts from bios_disk.S and
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* biosdisk_ll.c partly from netbsd:sys/arch/i386/boot/disk.c no bad144
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* handling!
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*/
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/*
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@ -45,24 +44,24 @@
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* Mach Operating System
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* Copyright (c) 1992, 1991 Carnegie Mellon University
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* All Rights Reserved.
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*
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
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* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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*
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* Carnegie Mellon requests users of this software to return to
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*
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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*
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* any improvements or extensions that they make and grant Carnegie Mellon
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* the rights to redistribute these changes.
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*/
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@ -79,181 +78,184 @@
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#define BUFSIZE (1 * BIOSDISK_SECSIZE)
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struct biosdisk {
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struct biosdisk_ll ll;
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struct biosdisk {
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struct biosdisk_ll ll;
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#ifdef COMPAT_OLDBOOT
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int disktype;
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int disktype;
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#endif
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int boff;
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char buf[BUFSIZE];
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int boff;
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char buf[BUFSIZE];
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};
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int biosdiskstrategy(devdata, flag, dblk, size, buf, rsize)
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void *devdata;
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int flag;
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daddr_t dblk;
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size_t size;
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void *buf;
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size_t *rsize;
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int
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biosdiskstrategy(devdata, flag, dblk, size, buf, rsize)
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void *devdata;
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int flag;
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daddr_t dblk;
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size_t size;
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void *buf;
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size_t *rsize;
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{
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struct biosdisk *d;
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int blks, frag;
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struct biosdisk *d;
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int blks, frag;
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if(flag != F_READ) return(EROFS);
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if (flag != F_READ)
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return (EROFS);
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d = (struct biosdisk*)devdata;
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d = (struct biosdisk *) devdata;
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dblk += d->boff;
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dblk += d->boff;
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blks = size / BIOSDISK_SECSIZE;
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if(blks && readsects(&d->ll, dblk, blks, buf, 0)){
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if(rsize) *rsize = 0;
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return(EIO);
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}
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/* do we really need this? */
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frag = size % BIOSDISK_SECSIZE;
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if(frag) {
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if(readsects(&d->ll, dblk + blks, 1, d->buf, 0)){
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if(rsize) *rsize = blks * BIOSDISK_SECSIZE;
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return(EIO);
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}
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bcopy(d->buf, buf + blks * BIOSDISK_SECSIZE, frag);
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}
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if(rsize) *rsize = size;
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return(0);
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blks = size / BIOSDISK_SECSIZE;
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if (blks && readsects(&d->ll, dblk, blks, buf, 0)) {
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if (rsize)
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*rsize = 0;
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return (EIO);
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}
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/* do we really need this? */
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frag = size % BIOSDISK_SECSIZE;
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if (frag) {
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if (readsects(&d->ll, dblk + blks, 1, d->buf, 0)) {
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if (rsize)
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*rsize = blks * BIOSDISK_SECSIZE;
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return (EIO);
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}
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bcopy(d->buf, buf + blks * BIOSDISK_SECSIZE, frag);
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}
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if (rsize)
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*rsize = size;
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return (0);
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}
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#ifdef COMPAT_OLDBOOT
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int biosdisk_gettype(f)
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struct open_file *f;
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int
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biosdisk_gettype(f)
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struct open_file *f;
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{
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struct biosdisk *d = f->f_devdata;
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return(d->disktype);
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struct biosdisk *d = f->f_devdata;
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return (d->disktype);
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}
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#endif
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int biosdiskopen(f, biosdev, partition)
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struct open_file *f;
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int biosdev;
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unsigned int partition;
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int
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biosdiskopen(f, biosdev, partition)
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struct open_file *f;
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int biosdev;
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unsigned int partition;
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{
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struct biosdisk *d;
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struct dos_partition *dptr;
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int sector;
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int error = 0, i;
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struct biosdisk *d;
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struct dos_partition *dptr;
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int sector;
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int error = 0, i;
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#ifndef NO_DISKLABEL
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struct disklabel *lp;
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struct disklabel *lp;
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#endif
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d = (struct biosdisk*)alloc(sizeof(struct biosdisk));
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if(!d) {
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d = (struct biosdisk *) alloc(sizeof(struct biosdisk));
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if (!d) {
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#ifdef DEBUG
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printf("biosdiskopen: no memory\n");
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printf("biosdiskopen: no memory\n");
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#endif
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return(ENOMEM);
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}
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d->ll.dev = biosdev;
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if(set_geometry(&d->ll)) {
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return (ENOMEM);
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}
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d->ll.dev = biosdev;
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if (set_geometry(&d->ll)) {
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#ifdef DISK_DEBUG
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printf("no geometry information\n");
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printf("no geometry information\n");
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#endif
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error = ENXIO;
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goto out;
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}
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/* find NetBSD Partition in DOS partition table
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XXX check magic??? */
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if(readsects(&d->ll, 0, 1, d->buf, 0)){
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error = ENXIO;
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goto out;
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}
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/*
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* find NetBSD Partition in DOS partition table XXX check magic???
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*/
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if (readsects(&d->ll, 0, 1, d->buf, 0)) {
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#ifdef DISK_DEBUG
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printf("error reading mbr\n");
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printf("error reading mbr\n");
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#endif
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error = EIO;
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goto out;
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}
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dptr = (struct dos_partition *)&d->buf[DOSPARTOFF];
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sector = -1;
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for (i = 0; i < NDOSPART; i++, dptr++)
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if (dptr->dp_typ == DOSPTYP_NETBSD) {
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sector = dptr->dp_start;
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break;
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}
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if (sector == -1) {
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/*
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* One of two things:
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* 1. no MBR
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* 2. no NetBSD partition in MBR
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*
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* We simply default to "start of disk" in this case and press on.
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*/
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sector = 0;
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}
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error = EIO;
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goto out;
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}
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dptr = (struct dos_partition *) & d->buf[DOSPARTOFF];
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sector = -1;
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for (i = 0; i < NDOSPART; i++, dptr++)
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if (dptr->dp_typ == DOSPTYP_NETBSD) {
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sector = dptr->dp_start;
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break;
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}
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if (sector == -1) {
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/*
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* One of two things:
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* 1. no MBR
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* 2. no NetBSD partition in MBR
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*
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* We simply default to "start of disk" in this case and
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* press on.
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*/
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sector = 0;
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}
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#ifdef NO_DISKLABEL
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d->boff = sector;
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d->boff = sector;
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#else
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/* find partition in NetBSD disklabel */
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if(readsects(&d->ll, sector + LABELSECTOR, 1, d->buf, 0)){
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/* find partition in NetBSD disklabel */
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if (readsects(&d->ll, sector + LABELSECTOR, 1, d->buf, 0)) {
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#ifdef DISK_DEBUG
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printf("Error reading disklabel\n");
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printf("Error reading disklabel\n");
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#endif
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error = EIO;
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goto out;
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}
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lp = (struct disklabel *)(d->buf + LABELOFFSET);
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if(lp->d_magic != DISKMAGIC) {
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error = EIO;
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goto out;
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}
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lp = (struct disklabel *) (d->buf + LABELOFFSET);
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if (lp->d_magic != DISKMAGIC) {
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#ifdef DISK_DEBUG
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printf("warning: no disklabel\n");
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printf("warning: no disklabel\n");
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#endif
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d->boff = sector;
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} else if(partition >= lp->d_npartitions ||
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lp->d_partitions[partition].p_fstype == FS_UNUSED) {
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d->boff = sector;
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} else if (partition >= lp->d_npartitions ||
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lp->d_partitions[partition].p_fstype == FS_UNUSED) {
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#ifdef DISK_DEBUG
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printf("illegal partition\n");
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printf("illegal partition\n");
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#endif
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error = EPART;
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goto out;
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} else {
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d->boff = lp->d_partitions[partition].p_offset;
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error = EPART;
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goto out;
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} else {
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d->boff = lp->d_partitions[partition].p_offset;
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#ifdef COMPAT_OLDBOOT
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d->disktype = lp->d_type;
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d->disktype = lp->d_type;
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#endif
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}
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#endif /* NO_DISKLABEL */
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}
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#endif /* NO_DISKLABEL */
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#ifdef DISK_DEBUG
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printf("partition @%d\n", d->boff);
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printf("partition @%d\n", d->boff);
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#endif
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f->f_devdata = d;
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f->f_devdata = d;
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out:
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if(error)
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free(d, sizeof(struct biosdisk));
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return(error);
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if (error)
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free(d, sizeof(struct biosdisk));
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return (error);
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}
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int biosdiskclose(f)
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struct open_file *f;
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int
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biosdiskclose(f)
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struct open_file *f;
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{
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struct biosdisk *d = f->f_devdata;
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struct biosdisk *d = f->f_devdata;
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if(!(d->ll.dev & 0x80)) /* let the floppy drive go off */
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delay(3000000); /* 2s is enough on all PCs I found */
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if (!(d->ll.dev & 0x80))/* let the floppy drive go off */
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delay(3000000); /* 2s is enough on all PCs I found */
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free(d, sizeof(struct biosdisk));
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f->f_devdata = NULL;
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return(0);
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free(d, sizeof(struct biosdisk));
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f->f_devdata = NULL;
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return (0);
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}
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int biosdiskioctl(f, cmd, arg)
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struct open_file *f;
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u_long cmd;
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void *arg;
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int
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biosdiskioctl(f, cmd, arg)
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struct open_file *f;
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u_long cmd;
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void *arg;
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{
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return EIO;
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return EIO;
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}
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@ -1,4 +1,4 @@
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/* $NetBSD: biosdisk.h,v 1.1.1.1 1997/03/14 02:40:32 perry Exp $ */
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/* $NetBSD: biosdisk.h,v 1.2 1997/03/22 01:41:35 thorpej Exp $ */
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/*
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* Copyright (c) 1996
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@ -29,10 +29,8 @@
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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int biosdiskstrategy __P((void*, int, daddr_t, size_t, void*, size_t*));
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int biosdiskopen __P((struct open_file*, ...));
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int biosdiskclose __P((struct open_file*));
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@ -1,4 +1,4 @@
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/* $NetBSD: biosdisk_ll.c,v 1.1.1.1 1997/03/14 02:40:32 perry Exp $ */
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/* $NetBSD: biosdisk_ll.c,v 1.2 1997/03/22 01:41:36 thorpej Exp $ */
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/*
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* Copyright (c) 1996
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@ -33,13 +33,12 @@
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/* shared by bootsector startup (bootsectmain)
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and biosdisk.c
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needs lowlevel parts from bios_disk.S
|
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*/
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/*
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* shared by bootsector startup (bootsectmain) and biosdisk.c needs lowlevel
|
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* parts from bios_disk.S
|
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*/
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#include <lib/libsa/stand.h>
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|
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@ -47,92 +46,100 @@
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#include "diskbuf.h"
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extern int get_diskinfo __P((int));
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extern int biosread __P((int, int, int, int, int, char*));
|
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extern int biosread __P((int, int, int, int, int, char *));
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|
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#define SPT(di) ((di)&0xff)
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#define HEADS(di) ((((di)>>8)&0xff)+1)
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int set_geometry(d)
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struct biosdisk_ll *d;
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int
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set_geometry(d)
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struct biosdisk_ll *d;
|
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{
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int diskinfo;
|
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int diskinfo;
|
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diskinfo = get_diskinfo(d->dev);
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diskinfo = get_diskinfo(d->dev);
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d->spc = (d->spt = SPT(diskinfo)) * HEADS(diskinfo);
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d->spc = (d->spt = SPT(diskinfo)) * HEADS(diskinfo);
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/* get_diskinfo assumes floppy if BIOS call
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fails. Check at least "valid" geometry. */
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return(!d->spc || !d->spt);
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/*
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* get_diskinfo assumes floppy if BIOS call fails. Check at least
|
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* "valid" geometry.
|
||||
*/
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return (!d->spc || !d->spt);
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}
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|
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/* Global shared "diskbuf" is used as read ahead buffer. For
|
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* reading from floppies, the bootstrap has to be loaded on a 64K boundary
|
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* to ensure that this buffer doesn't cross a 64K DMA boundary.
|
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/*
|
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* Global shared "diskbuf" is used as read ahead buffer. For reading from
|
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* floppies, the bootstrap has to be loaded on a 64K boundary to ensure that
|
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* this buffer doesn't cross a 64K DMA boundary.
|
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*/
|
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#define RA_SECTORS (DISKBUFSIZE / BIOSDISK_SECSIZE)
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static int ra_dev;
|
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static int ra_end;
|
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static int ra_first;
|
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static int ra_dev;
|
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static int ra_end;
|
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static int ra_first;
|
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|
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int readsects(d, dblk, num, buf, cold) /* reads ahead if (!cold) */
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struct biosdisk_ll *d;
|
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int dblk, num;
|
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char *buf;
|
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int cold; /* don't use data segment or bss, don't call library functions */
|
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int
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readsects(d, dblk, num, buf, cold) /* reads ahead if (!cold) */
|
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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;
|
||||
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) {
|
||||
/* 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;
|
||||
/* 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;
|
||||
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 > RA_SECTORS)
|
||||
nsec = RA_SECTORS;
|
||||
if (cold) {
|
||||
/* transfer directly to buffer */
|
||||
trbuf = buf;
|
||||
if (nsec > num)
|
||||
nsec = num;
|
||||
} else {
|
||||
/* fill read-ahead buffer */
|
||||
trbuf = diskbuf;
|
||||
if (nsec > RA_SECTORS)
|
||||
nsec = RA_SECTORS;
|
||||
|
||||
ra_dev = d->dev;
|
||||
ra_first = dblk;
|
||||
ra_end = dblk + nsec;
|
||||
diskbuf_user = &ra_dev;
|
||||
}
|
||||
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) */
|
||||
}
|
||||
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;
|
||||
|
||||
} 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);
|
||||
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;
|
||||
}
|
||||
|
||||
buf += nsec * BIOSDISK_SECSIZE;
|
||||
num -= nsec;
|
||||
dblk += nsec;
|
||||
}
|
||||
|
||||
return(0);
|
||||
return (0);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,4 +1,4 @@
|
|||
/* $NetBSD: biosdisk_ll.h,v 1.1.1.1 1997/03/14 02:40:32 perry Exp $ */
|
||||
/* $NetBSD: biosdisk_ll.h,v 1.2 1997/03/22 01:41:36 thorpej Exp $ */
|
||||
|
||||
/*
|
||||
* Copyright (c) 1996
|
||||
|
|
@ -33,21 +33,19 @@
|
|||
* 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
|
||||
|
||||
/*
|
||||
* shared by bootsector startup (bootsectmain) and biosdisk.c needs lowlevel
|
||||
* parts from bios_disk.S
|
||||
*/
|
||||
|
||||
struct biosdisk_ll {
|
||||
int dev; /* BIOS device number */
|
||||
int spt, spc; /* geometry */
|
||||
int dev; /* BIOS device number */
|
||||
int spt, spc; /* geometry */
|
||||
};
|
||||
|
||||
#define BIOSDISK_SECSIZE 512
|
||||
|
||||
int set_geometry __P((struct biosdisk_ll*));
|
||||
int readsects __P((struct biosdisk_ll*, int, int, char*, int));
|
||||
int set_geometry __P((struct biosdisk_ll *));
|
||||
int readsects __P((struct biosdisk_ll *, int, int, char *, int));
|
||||
|
|
|
|||
Loading…
Reference in New Issue