NetBSD-5.0.2/sys/arch/sparc/stand/ofwboot/ofdev.c
/* $NetBSD: ofdev.c,v 1.20 2008/05/18 13:18:19 mlelstv 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>
#ifdef NETBOOT
#include <netinet/in.h>
#endif
#include <lib/libsa/stand.h>
#include <lib/libsa/ufs.h>
#include <lib/libsa/cd9660.h>
#ifdef NETBOOT
#include <lib/libsa/nfs.h>
#include <lib/libsa/tftp.h>
#endif
#include <lib/libkern/libkern.h>
#include <dev/sun/disklabel.h>
#include <dev/raidframe/raidframevar.h>
#include <machine/promlib.h>
#include "ofdev.h"
#include "boot.h"
extern char bootdev[];
/*
* This is ugly. A path on a sparc machine is something like this:
*
* [device] [-<options] [path] [-options] [otherstuff] [-<more options]
*
*/
char *
filename(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 = prom_finddevice(str);
DPRINTF(("filename: prom_finddevice(%s) returned %x\n",
str, dhandle));
*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 */
DPRINTF(("filename: hunting for arguments "
"in %s\n", lp));
for (cp = lp; ; ) {
cp--;
if (cp < str ||
cp[0] == '/' ||
(cp[0] == ' ' && (cp+1) != lp &&
cp[1] == '-'))
break;
}
if (cp >= str && *cp == '-')
/* found arguments, make firmware
ignore them */
*cp = 0;
for (cp = lp; *--cp && *cp != ','
&& *cp != ':';)
;
if (cp[0] == ':' && cp[1] >= 'a' &&
cp[1] <= 'a' + MAXPARTITIONS) {
*ppart = cp[1];
cp[0] = '\0';
}
}
DPRINTF(("filename: found %s\n",lp));
return lp;
} else if (_prom_getprop(dhandle, "device_type", devtype,
sizeof devtype) < 0)
devtype[0] = 0;
}
DPRINTF(("filename: not found\n",lp));
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");
#ifdef NON_DEBUG
printf("strategy: block %lx, partition offset %lx, blksz %lx\n",
(long)blk, (long)dev->partoff, (long)dev->bsize);
printf("strategy: seek position should be: %lx\n",
(long)((blk + dev->partoff) * dev->bsize));
#endif
pos = (u_quad_t)(blk + dev->partoff) * dev->bsize;
for (;;) {
#ifdef NON_DEBUG
printf("strategy: seeking to %lx\n", (long)pos);
#endif
if (prom_seek(dev->handle, pos) < 0)
break;
#ifdef NON_DEBUG
printf("strategy: reading %lx at %p\n", (long)size, buf);
#endif
n = prom_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;
#ifdef NETBOOT
if (op->type == OFDEV_NET)
net_close(op);
#endif
prom_close(op->handle);
op->handle = -1;
}
static struct devsw ofdevsw[1] = {
"OpenFirmware",
strategy,
(int (*)(struct open_file *, ...))nodev,
devclose,
noioctl
};
int ndevs = sizeof ofdevsw / sizeof ofdevsw[0];
#ifdef SPARC_BOOT_UFS
static struct fs_ops file_system_ufs = FS_OPS(ufs);
#endif
#ifdef SPARC_BOOT_CD9660
static struct fs_ops file_system_cd9660 = FS_OPS(cd9660);
#endif
#ifdef NETBOOT
static struct fs_ops file_system_nfs = FS_OPS(nfs);
static struct fs_ops file_system_tftp = FS_OPS(tftp);
#endif
struct fs_ops file_system[3];
int nfsys;
static struct of_dev ofdev = {
-1,
};
char opened_name[256];
int floppyboot;
static u_long
get_long(const void *p)
{
const unsigned char *cp = p;
return cp[0] | (cp[1] << 8) | (cp[2] << 16) | (cp[3] << 24);
}
/************************************************************************
*
* The rest of this was taken from arch/sparc64/scsi/sun_disklabel.c
* and then substantially rewritten by Gordon W. Ross
*
************************************************************************/
/* What partition types to assume for Sun disklabels: */
static u_char
sun_fstypes[8] = {
FS_BSDFFS, /* a */
FS_SWAP, /* b */
FS_OTHER, /* c - whole disk */
FS_BSDFFS, /* d */
FS_BSDFFS, /* e */
FS_BSDFFS, /* f */
FS_BSDFFS, /* g */
FS_BSDFFS, /* h */
};
/*
* Given a SunOS disk label, set lp to a BSD disk label.
* Returns NULL on success, else an error string.
*
* The BSD label is cleared out before this is called.
*/
static char *
disklabel_sun_to_bsd(char *cp, struct disklabel *lp)
{
struct sun_disklabel *sl;
struct partition *npp;
struct sun_dkpart *spp;
int i, secpercyl;
u_short cksum, *sp1, *sp2;
sl = (struct sun_disklabel *)cp;
/* Verify the XOR check. */
sp1 = (u_short *)sl;
sp2 = (u_short *)(sl + 1);
cksum = 0;
while (sp1 < sp2)
cksum ^= *sp1++;
if (cksum != 0)
return("SunOS disk label, bad checksum");
/* Format conversion. */
lp->d_magic = DISKMAGIC;
lp->d_magic2 = DISKMAGIC;
memcpy(lp->d_packname, sl->sl_text, sizeof(lp->d_packname));
lp->d_secsize = 512;
lp->d_nsectors = sl->sl_nsectors;
lp->d_ntracks = sl->sl_ntracks;
lp->d_ncylinders = sl->sl_ncylinders;
secpercyl = sl->sl_nsectors * sl->sl_ntracks;
lp->d_secpercyl = secpercyl;
lp->d_secperunit = secpercyl * sl->sl_ncylinders;
lp->d_sparespercyl = sl->sl_sparespercyl;
lp->d_acylinders = sl->sl_acylinders;
lp->d_rpm = sl->sl_rpm;
lp->d_interleave = sl->sl_interleave;
lp->d_npartitions = 8;
/* These are as defined in <ufs/ffs/fs.h> */
lp->d_bbsize = 8192; /* XXX */
lp->d_sbsize = 8192; /* XXX */
for (i = 0; i < 8; i++) {
spp = &sl->sl_part[i];
npp = &lp->d_partitions[i];
npp->p_offset = spp->sdkp_cyloffset * secpercyl;
npp->p_size = spp->sdkp_nsectors;
DPRINTF(("partition %d start %x size %x\n", i, (int)npp->p_offset, (int)npp->p_size));
if (npp->p_size == 0) {
npp->p_fstype = FS_UNUSED;
} else {
npp->p_fstype = sun_fstypes[i];
if (npp->p_fstype == FS_BSDFFS) {
/*
* The sun label does not store the FFS fields,
* so just set them with default values here.
*/
npp->p_fsize = 1024;
npp->p_frag = 8;
npp->p_cpg = 16;
}
}
}
lp->d_checksum = 0;
lp->d_checksum = dkcksum(lp);
DPRINTF(("disklabel_sun_to_bsd: success!\n"));
return (NULL);
}
/*
* Find a valid disklabel.
*/
static char *
search_label(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;
struct disklabel *dlp;
struct sun_disklabel *slp;
int error;
/* minimal requirements for archtypal disk label */
if (lp->d_secperunit == 0)
lp->d_secperunit = 0x1fffffff;
lp->d_npartitions = 1;
if (lp->d_partitions[0].p_size == 0)
lp->d_partitions[0].p_size = 0x1fffffff;
lp->d_partitions[0].p_offset = 0;
if (strategy(devp, F_READ, LABELSECTOR, DEV_BSIZE, buf, &read)
|| read != DEV_BSIZE)
return ("Cannot read label");
/* Check for a NetBSD disk label. */
dlp = (struct disklabel *) (buf + LABELOFFSET);
if (dlp->d_magic == DISKMAGIC) {
if (dkcksum(dlp))
return ("NetBSD disk label corrupted");
*lp = *dlp;
DPRINTF(("search_label: found NetBSD label\n"));
return (NULL);
}
/* Check for a Sun disk label (for PROM compatibility). */
slp = (struct sun_disklabel *) buf;
if (slp->sl_magic == SUN_DKMAGIC)
return (disklabel_sun_to_bsd(buf, lp));
bzero(buf, sizeof(buf));
return ("no disk label");
}
int
devopen(struct open_file *of, const char *name, char **file)
{
char *cp;
char partition;
char fname[256], devname[256];
union {
char buf[DEV_BSIZE];
struct disklabel label;
} b;
struct disklabel label;
int handle, part, try = 0;
size_t read;
char *errmsg = NULL, *pp, savedpart = 0;
int error = 0;
if (ofdev.handle != -1)
panic("devopen");
if (of->f_flags != F_READ)
return EPERM;
DPRINTF(("devopen: you want %s\n", name));
strcpy(fname, name);
cp = filename(fname, &partition);
if (cp) {
strcpy(b.buf, cp);
*cp = 0;
}
if (!cp || !b.buf[0])
strcpy(b.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;
}
*file = opened_name + strlen(opened_name);
if (b.buf[0] != '/')
strcat(opened_name, "/");
strcat(opened_name, b.buf);
DPRINTF(("devopen: trying %s\n", fname));
if ((handle = prom_finddevice(fname)) == -1)
return ENOENT;
DPRINTF(("devopen: found %s\n", fname));
if (_prom_getprop(handle, "name", b.buf, sizeof b.buf) < 0)
return ENXIO;
DPRINTF(("devopen: %s is called %s\n", fname, b.buf));
floppyboot = !strcmp(b.buf, "floppy");
if (_prom_getprop(handle, "device_type", b.buf, sizeof b.buf) < 0)
return ENXIO;
DPRINTF(("devopen: %s is a %s device\n", fname, b.buf));
if (!strcmp(b.buf, "block")) {
pp = strrchr(fname, ':');
if (pp && pp[1] >= 'a' && pp[1] <= 'f' && pp[2] == 0) {
savedpart = pp[1];
} else {
savedpart = 'a';
handle = prom_open(fname);
if (handle != -1) {
OF_instance_to_path(handle, devname,
sizeof(devname));
DPRINTF(("real path: %s\n", devname));
prom_close(handle);
pp = devname + strlen(devname);
if (pp > devname + 3) pp -= 2;
if (pp[0] == ':')
savedpart = pp[1];
}
pp = fname + strlen(fname);
pp[0] = ':';
pp[2] = '\0';
}
pp[1] = 'c';
DPRINTF(("devopen: replacing by whole disk device %s\n",
fname));
if (savedpart)
partition = savedpart;
}
open_again:
DPRINTF(("devopen: opening %s\n", fname));
if ((handle = prom_open(fname)) == -1) {
DPRINTF(("devopen: open of %s failed\n", fname));
if (pp && savedpart) {
if (try == 0) {
pp[0] = '\0';
try = 1;
} else {
pp[0] = ':';
pp[1] = savedpart;
pp = NULL;
savedpart = '\0';
}
goto open_again;
}
return ENXIO;
}
DPRINTF(("devopen: %s is now open\n", fname));
bzero(&ofdev, sizeof ofdev);
ofdev.handle = handle;
if (!strcmp(b.buf, "block")) {
ofdev.type = OFDEV_DISK;
ofdev.bsize = DEV_BSIZE;
/* First try to find a disklabel without MBR partitions */
DPRINTF(("devopen: trying to read disklabel\n"));
if (strategy(&ofdev, F_READ,
LABELSECTOR, DEV_BSIZE, b.buf, &read) != 0
|| read != DEV_BSIZE
|| (errmsg = getdisklabel(b.buf, &label))) {
if (errmsg) printf("devopen: getdisklabel returned %s\n", errmsg);
/* Else try MBR partitions */
errmsg = search_label(&ofdev, 0, b.buf, &label, 0);
if (errmsg) {
printf("devopen: search_label returned %s\n", errmsg);
error = ERDLAB;
}
if (error && error != ERDLAB)
goto bad;
}
if (error == ERDLAB) {
/* No, label, just use complete disk */
ofdev.partoff = 0;
if (pp && savedpart) {
pp[1] = savedpart;
prom_close(handle);
if ((handle = prom_open(fname)) == -1) {
DPRINTF(("devopen: open of %s failed\n",
fname));
return ENXIO;
}
ofdev.handle = handle;
DPRINTF(("devopen: back to original device %s\n",
fname));
}
} else {
part = partition ? partition - 'a' : 0;
ofdev.partoff = label.d_partitions[part].p_offset;
DPRINTF(("devopen: setting partition %d offset %x\n",
part, ofdev.partoff));
if (label.d_partitions[part].p_fstype == FS_RAID) {
ofdev.partoff += RF_PROTECTED_SECTORS;
DPRINTF(("devopen: found RAID partition, "
"adjusting offset to %x\n", ofdev.partoff));
}
}
nfsys = 0;
of->f_dev = ofdevsw;
of->f_devdata = &ofdev;
#ifdef SPARC_BOOT_UFS
bcopy(&file_system_ufs, &file_system[nfsys++], sizeof file_system[0]);
#endif
#ifdef SPARC_BOOT_CD9660
bcopy(&file_system_cd9660, &file_system[nfsys++],
sizeof file_system[0]);
#endif
DPRINTF(("devopen: return 0\n"));
return 0;
}
#ifdef NETBOOT
if (!strcmp(b.buf, "network")) {
if (error = net_open(&ofdev))
goto bad;
ofdev.type = OFDEV_NET;
of->f_dev = ofdevsw;
of->f_devdata = NULL;
if (!strncmp(*file,"/tftp:",6)) {
*file += 6;
bcopy(&file_system_tftp, &file_system[0], sizeof file_system[0]);
if (net_tftp_bootp(&of->f_devdata)) {
net_close(&ofdev);
goto bad;
}
} else {
bcopy(&file_system_nfs, &file_system[0], sizeof file_system[0]);
if (error = net_mountroot()) {
net_close(&ofdev);
goto bad;
}
}
nfsys = 1;
return 0;
}
#endif
error = EFTYPE;
bad:
DPRINTF(("devopen: error %d, cannot open device\n", error));
prom_close(handle);
ofdev.handle = -1;
return error;
}