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NetBSD/sys/arch/powerpc/stand/ofdev.c
ws 5804d3f648 PowerPC port
1996-09-30 16:34:14 +00:00

338 lines
8.1 KiB
C
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/* $NetBSD: ofdev.c,v 1.1 1996/09/30 16:35:03 ws Exp $ */
/*
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
* Copyright (C) 1995, 1996 TooLs GmbH.
* 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 TooLs GmbH.
* 4. The name of TooLs GmbH may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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.
*/
/*
* Device I/O routines using Open Firmware
*/
#include <sys/param.h>
#include <sys/disklabel.h>
#include <netinet/in.h>
#include <stand.h>
#include <ufs.h>
#include <cd9660.h>
#include <nfs.h>
#include "ofdev.h"
extern char bootdev[];
static char *
filename(str, ppart)
char *str;
char *ppart;
{
char *cp, *lp;
char savec;
int dhandle;
char devtype[16];
lp = str;
devtype[0] = 0;
*ppart = 0;
for (cp = str; *cp; lp = cp) {
/* For each component of the path name... */
while (*++cp && *cp != '/');
savec = *cp;
*cp = 0;
/* ...look whether there is a device with this name */
dhandle = OF_finddevice(str);
*cp = savec;
if (dhandle == -1) {
/* if not, lp is the delimiter between device and path */
/* if the last component was a block device... */
if (!strcmp(devtype, "block")) {
/* search for arguments */
for (cp = lp;
--cp >= str && *cp != '/' && *cp != ':';);
if (cp >= str && *cp == ':') {
/* found arguments, make firmware ignore them */
*cp = 0;
for (cp = lp; *--cp && *cp != ',';);
if (*++cp >= 'a' && *cp <= 'a' + MAXPARTITIONS)
*ppart = *cp;
}
}
return lp;
} else if (OF_getprop(dhandle, "device_type", devtype, sizeof devtype) < 0)
devtype[0] = 0;
}
return 0;
}
static int
strategy(devdata, rw, blk, size, buf, rsize)
void *devdata;
int rw;
daddr_t blk;
size_t size;
void *buf;
size_t *rsize;
{
struct of_dev *dev = devdata;
u_quad_t pos;
int n;
if (rw != F_READ)
return EPERM;
if (dev->type != OFDEV_DISK)
panic("strategy");
pos = (u_quad_t)(blk + dev->partoff) * dev->bsize;
for (;;) {
if (OF_seek(dev->handle, pos) < 0)
break;
n = OF_read(dev->handle, buf, size);
if (n == -2)
continue;
if (n < 0)
break;
*rsize = n;
return 0;
}
return EIO;
}
static int
devclose(of)
struct open_file *of;
{
struct of_dev *op = of->f_devdata;
if (op->type == OFDEV_NET)
net_close(op);
OF_close(op->handle);
op->handle = -1;
}
static struct devsw devsw[1] = {
"OpenFirmware",
strategy,
(int (*)__P((struct open_file *, ...)))nodev,
devclose,
noioctl
};
int ndevs = sizeof devsw / sizeof devsw[0];
static struct fs_ops file_system_ufs = {
ufs_open, ufs_close, ufs_read, ufs_write, ufs_seek, ufs_stat
};
static struct fs_ops file_system_cd9660 = {
cd9660_open, cd9660_close, cd9660_read, cd9660_write, cd9660_seek, cd9660_stat
};
static struct fs_ops file_system_nfs = {
nfs_open, nfs_close, nfs_read, nfs_write, nfs_seek, nfs_stat
};
struct fs_ops file_system[2];
int nfsys;
static struct of_dev ofdev = {
-1,
};
char opened_name[256];
int floppyboot;
static u_long
get_long(p)
const void *p;
{
const unsigned char *cp = p;
return cp[0] | (cp[1] << 8) | (cp[2] << 16) | (cp[3] << 24);
}
/*
* Find a valid disklabel.
*/
static int
search_label(devp, off, buf, lp, off0)
struct of_dev *devp;
u_long off;
char *buf;
struct disklabel *lp;
u_long off0;
{
size_t read;
struct mbr_partition *p;
int i;
u_long poff;
static int recursion;
if (strategy(devp, F_READ, off, DEV_BSIZE, buf, &read)
|| read != DEV_BSIZE)
return ERDLAB;
if (buf[510] != 0x55 || buf[511] != 0xaa)
return ERDLAB;
if (recursion++ <= 1)
off0 += off;
for (p = (struct mbr_partition *)(buf + MBRPARTOFF), i = 4;
--i >= 0; p++) {
if (p->mbr_type == MBR_NETBSD) {
poff = get_long(&p->mbr_start) + off0;
if (strategy(devp, F_READ, poff + LABELSECTOR,
DEV_BSIZE, buf, &read) == 0
&& read == DEV_BSIZE) {
if (!getdisklabel(buf, lp)) {
recursion--;
return 0;
}
}
if (strategy(devp, F_READ, off, DEV_BSIZE, buf, &read)
|| read != DEV_BSIZE) {
recursion--;
return ERDLAB;
}
} else if (p->mbr_type == MBR_EXTENDED) {
poff = get_long(&p->mbr_start);
if (!search_label(devp, poff, buf, lp, off0)) {
recursion--;
return 0;
}
if (strategy(devp, F_READ, off, DEV_BSIZE, buf, &read)
|| read != DEV_BSIZE) {
recursion--;
return ERDLAB;
}
}
}
recursion--;
return ERDLAB;
}
int
devopen(of, name, file)
struct open_file *of;
const char *name;
char **file;
{
char *cp;
char partition;
char fname[256];
char buf[DEV_BSIZE];
struct disklabel label;
int handle, part;
size_t read;
int error = 0;
if (ofdev.handle != -1)
panic("devopen");
if (of->f_flags != F_READ)
return EPERM;
strcpy(fname, name);
cp = filename(fname, &partition);
if (cp) {
strcpy(buf, cp);
*cp = 0;
}
if (!cp || !*buf)
strcpy(buf, DEFAULT_KERNEL);
if (!*fname)
strcpy(fname, bootdev);
strcpy(opened_name, fname);
if (partition) {
cp = opened_name + strlen(opened_name);
*cp++ = ':';
*cp++ = partition;
*cp = 0;
}
if (*buf != '/')
strcat(opened_name, "/");
strcat(opened_name, buf);
*file = opened_name + strlen(fname) + 1;
if ((handle = OF_finddevice(fname)) == -1)
return ENOENT;
if (OF_getprop(handle, "name", buf, sizeof buf) < 0)
return ENXIO;
floppyboot = !strcmp(buf, "floppy");
if (OF_getprop(handle, "device_type", buf, sizeof buf) < 0)
return ENXIO;
if (!strcmp(buf, "block"))
/* For block devices, indicate raw partition (:0 in OpenFirmware) */
strcat(fname, ":0");
if ((handle = OF_open(fname)) == -1)
return ENXIO;
bzero(&ofdev, sizeof ofdev);
ofdev.handle = handle;
if (!strcmp(buf, "block")) {
ofdev.type = OFDEV_DISK;
ofdev.bsize = DEV_BSIZE;
/* First try to find a disklabel without MBR partitions */
if (strategy(&ofdev, F_READ,
LABELSECTOR, DEV_BSIZE, buf, &read) != 0
|| read != DEV_BSIZE
|| getdisklabel(buf, &label)) {
/* Else try MBR partitions */
error = search_label(&ofdev, 0, buf, &label, 0);
if (error && error != ERDLAB)
goto bad;
}
if (error == ERDLAB) {
if (partition)
/* User specified a parititon, but there is none */
goto bad;
/* No, label, just use complete disk */
ofdev.partoff = 0;
} else {
part = partition ? partition - 'a' : 0;
ofdev.partoff = label.d_partitions[part].p_offset;
}
of->f_dev = devsw;
of->f_devdata = &ofdev;
bcopy(&file_system_ufs, file_system, sizeof file_system[0]);
bcopy(&file_system_cd9660, file_system + 1, sizeof file_system[0]);
nfsys = 2;
return 0;
}
if (!strcmp(buf, "network")) {
ofdev.type = OFDEV_NET;
of->f_dev = devsw;
of->f_devdata = &ofdev;
bcopy(&file_system_nfs, file_system, sizeof file_system[0]);
nfsys = 1;
if (error = net_open(&ofdev))
goto bad;
return 0;
}
error = EFTYPE;
bad:
OF_close(handle);
ofdev.handle = -1;
return error;
}
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