/* $OpenBSD: ofdev.c,v 1.14 2007/06/14 03:27:16 drahn Exp $ */
/* $NetBSD: ofdev.c,v 1.1 1997/04/16 20:29:20 thorpej 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 <lib/libsa/stand.h>
#include <lib/libsa/ufs.h>
#include <lib/libsa/cd9660.h>
#include <lib/libsa/nfs.h>
#include <hfs.h>
#include <macppc/stand/ofdev.h>
extern char bootdev[];
/*
* this function is passed [device specifier]:[kernel]
* however a device specifier may contain a ':'
*/
char namebuf[256];
static char *
filename(char *str)
{
char *cp, *lp;
char savec;
int dhandle;
cp = strrchr(str, ':');
if (cp == NULL)
return NULL;
savec = *cp;
*cp = 0;
strlcpy(namebuf, cp+1, sizeof namebuf);
return namebuf;
}
static int
strategy(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(struct open_file *of)
{
struct of_dev *op = of->f_devdata;
if (op->type == OFDEV_NET)
net_close(op);
if (op->dmabuf)
OF_call_method("dma-free", op->handle, 2, 0,
op->dmabuf, MAXPHYS);
OF_close(op->handle);
op->handle = -1;
}
static struct devsw devsw[1] = {
"OpenFirmware",
strategy,
(int (*)(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_hfs = {
hfs_open, hfs_close, hfs_read, hfs_write, hfs_seek, hfs_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[3];
int nfsys;
static struct of_dev ofdev = {
-1,
};
char opened_name[256];
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);
}
int
read_mac_label(struct of_dev *devp, char *buf, struct disklabel *lp)
{
struct part_map_entry *part;
struct buf *bp;
int err;
size_t read;
int part_cnt;
int i;
char *s;
if ((strategy(devp, F_READ, 1, DEV_BSIZE, buf, &read) != 0) ||
(read != DEV_BSIZE))
return ERDLAB;
part = (struct part_map_entry *)buf;
/* if first partition is not valid, assume not HFS/DPME partitioned */
if (part->pmSig != PART_ENTRY_MAGIC)
return ERDLAB;
part_cnt = part->pmMapBlkCnt;
/* first search for "OpenBSD" partition type
* standard bsd disklabel lives inside at offset 0
* otherwise, we should fake a bsd partition
* with first HFS partition starting at 'i'
* ? will this cause problems with booting bsd.rd from hfs
*/
for (i = 0; i < part_cnt; i++) {
/* read the appropriate block */
if ((strategy(devp, F_READ, 1+i, DEV_BSIZE, buf, &read) != 0)
|| (read != DEV_BSIZE))
return ERDLAB;
part = (struct part_map_entry *)buf;
/* toupper the string, in case caps are different... */
for (s = part->pmPartType; *s; s++)
if ((*s >= 'a') && (*s <= 'z'))
*s = (*s - 'a' + 'A');
if (0 == strcmp(part->pmPartType, PART_TYPE_OPENBSD)) {
/* FOUND OUR PARTITION!!! */
if(strategy(devp, F_READ, part->pmPyPartStart,
DEV_BSIZE, buf, &read) == 0
&& read == DEV_BSIZE)
{
if (!getdisklabel(buf, lp))
return 0;
/* If we have an OpenBSD region
* but no valid parition table,
* we cannot load a kernel from
* it, punt.
* should not have more than one
* OpenBSD of DPME type.
*/
return ERDLAB;
}
}
}
return ERDLAB;
}
/*
* 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 dos_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 dos_partition *)(buf + DOSPARTOFF), i = 4;
--i >= 0; p++) {
if (p->dp_typ == DOSPTYP_OPENBSD) {
poff = get_long(&p->dp_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->dp_typ == DOSPTYP_EXTEND) {
poff = get_long(&p->dp_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(struct open_file *of, const char *name, char **file)
{
char *cp;
char fname[256];
char devname[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;
strlcpy(fname, name, sizeof fname);
cp = filename(fname);
if (cp == NULL)
return ENOENT;
strlcpy(buf, cp, sizeof buf);
strlcpy(opened_name, fname, sizeof opened_name);
strlcat(opened_name, ":", sizeof opened_name);
if (*buf != '/')
strlcat(opened_name, "/", sizeof opened_name);
strlcat(opened_name, buf, sizeof opened_name);
*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;
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)
*/
strlcat(fname, ":0", sizeof fname);
if ((handle = OF_open(fname)) == -1)
return ENXIO;
bzero(&ofdev, sizeof ofdev);
ofdev.handle = handle;
ofdev.dmabuf = NULL;
OF_call_method("dma-alloc", handle, 1, 1, MAXPHYS, &ofdev.dmabuf);
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 = read_mac_label(&ofdev, buf, &label);
if (error == ERDLAB)
error = search_label(&ofdev, 0, buf, &label, 0);
if (error && error != ERDLAB)
goto bad;
}
if (error == ERDLAB) {
/* No label, just use complete disk */
ofdev.partoff = 0;
} else {
part = 0; /* how to pass this parameter */
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]);
bcopy(&file_system_hfs, file_system + 2,
sizeof file_system[0]);
nfsys = 3;
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;
}