521 lines
12 KiB
C
521 lines
12 KiB
C
/* $NetBSD: ofdev.c,v 1.1.1.1 1998/06/20 04:58:53 eeh Exp $ */
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/*
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* Copyright (C) 1995, 1996 Wolfgang Solfrank.
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* Copyright (C) 1995, 1996 TooLs GmbH.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by TooLs GmbH.
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* 4. The name of TooLs GmbH may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Device I/O routines using Open Firmware
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*/
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#include <sys/param.h>
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#include <sys/disklabel.h>
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#ifdef NETBOOT
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#include <netinet/in.h>
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#endif
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#include <lib/libsa/stand.h>
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#include <lib/libsa/ufs.h>
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#include <lib/libsa/cd9660.h>
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#ifdef NETBOOT
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#include <lib/libsa/nfs.h>
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#endif
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#include <machine/sun_disklabel.h>
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#include <sparc64/stand/ofwboot/ofdev.h>
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extern char bootdev[];
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/*
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* This is ugly. A path on a sparc machine is something like this:
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*
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* [device] [-<options] [path] [-options] [otherstuff] [-<more options]
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*
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*/
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static char *
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filename(str, ppart)
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char *str;
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char *ppart;
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{
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char *cp, *lp;
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char savec;
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int dhandle;
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char devtype[16];
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lp = str;
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devtype[0] = 0;
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*ppart = 0;
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for (cp = str; *cp; lp = cp) {
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/* For each component of the path name... */
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while (*++cp && *cp != '/');
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savec = *cp;
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*cp = 0;
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/* ...look whether there is a device with this name */
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dhandle = OF_finddevice(str);
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#ifdef NOTDEF_DEBUG
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printf("filename: OF_finddevice(%s) sez %x\n",
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str, dhandle);
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#endif
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*cp = savec;
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if (dhandle == -1) {
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/* if not, lp is the delimiter between device and path */
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/* if the last component was a block device... */
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if (!strcmp(devtype, "block")) {
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/* search for arguments */
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#ifdef NOTDEF_DEBUG
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printf("filename: hunting for arguments in %s\n", str);
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#endif
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for (cp = lp;
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--cp >= str && *cp != '/' && *cp != '-';);
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if (cp >= str && *cp == '-') {
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/* found arguments, make firmware ignore them */
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*cp = 0;
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for (cp = lp; *--cp && *cp != ',';);
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if (*++cp >= 'a' && *cp <= 'a' + MAXPARTITIONS)
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*ppart = *cp;
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}
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}
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#ifdef NOTDEF_DEBUG
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printf("filename: found %s\n",lp);
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#endif
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return lp;
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} else if (OF_getprop(dhandle, "device_type", devtype, sizeof devtype) < 0)
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devtype[0] = 0;
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}
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#ifdef NOTDEF_DEBUG
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printf("filename: not found\n",lp);
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#endif
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return 0;
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}
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static int
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strategy(devdata, rw, blk, size, buf, rsize)
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void *devdata;
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int rw;
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daddr_t blk;
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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 of_dev *dev = devdata;
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u_quad_t pos;
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int n;
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if (rw != F_READ)
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return EPERM;
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if (dev->type != OFDEV_DISK)
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panic("strategy");
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pos = (u_quad_t)(blk + dev->partoff) * dev->bsize;
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for (;;) {
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#ifdef NON_DEBUG
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printf("strategy: seeking to %x\n", pos);
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#endif
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if (OF_seek(dev->handle, pos) < 0)
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break;
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#ifdef NON_DEBUG
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printf("strategy: reading %x at %x\n", size, buf);
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#endif
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n = OF_read(dev->handle, buf, size);
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if (n == -2)
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continue;
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if (n < 0)
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break;
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*rsize = n;
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return 0;
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}
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return EIO;
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}
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static int
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devclose(of)
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struct open_file *of;
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{
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struct of_dev *op = of->f_devdata;
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#ifdef NETBOOT
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if (op->type == OFDEV_NET)
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net_close(op);
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#endif
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OF_close(op->handle);
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op->handle = -1;
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}
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static struct devsw devsw[1] = {
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"OpenFirmware",
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strategy,
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(int (*)__P((struct open_file *, ...)))nodev,
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devclose,
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noioctl
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};
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int ndevs = sizeof devsw / sizeof devsw[0];
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#ifdef SPARC_BOOT_UFS
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static struct fs_ops file_system_ufs = {
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ufs_open, ufs_close, ufs_read, ufs_write, ufs_seek, ufs_stat
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};
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#endif
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#ifdef SPARC_BOOT_HSFS
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static struct fs_ops file_system_cd9660 = {
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cd9660_open, cd9660_close, cd9660_read, cd9660_write, cd9660_seek,
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cd9660_stat
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};
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#endif
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#ifdef NETBOOT
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static struct fs_ops file_system_nfs = {
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nfs_open, nfs_close, nfs_read, nfs_write, nfs_seek, nfs_stat
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};
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#endif
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struct fs_ops file_system[3];
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int nfsys;
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static struct of_dev ofdev = {
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-1,
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};
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char opened_name[256];
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int floppyboot;
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static u_long
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get_long(p)
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const void *p;
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{
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const unsigned char *cp = p;
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return cp[0] | (cp[1] << 8) | (cp[2] << 16) | (cp[3] << 24);
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}
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/************************************************************************
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*
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* The rest of this was taken from arch/sparc64/scsi/sun_disklabel.c
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* and then substantially rewritten by Gordon W. Ross
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*
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************************************************************************/
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/* What partition types to assume for Sun disklabels: */
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static u_char
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sun_fstypes[8] = {
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FS_BSDFFS, /* a */
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FS_SWAP, /* b */
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FS_OTHER, /* c - whole disk */
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FS_BSDFFS, /* d */
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FS_BSDFFS, /* e */
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FS_BSDFFS, /* f */
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FS_BSDFFS, /* g */
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FS_BSDFFS, /* h */
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};
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/*
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* Given a SunOS disk label, set lp to a BSD disk label.
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* Returns NULL on success, else an error string.
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*
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* The BSD label is cleared out before this is called.
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*/
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static char *
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disklabel_sun_to_bsd(cp, lp)
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char *cp;
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struct disklabel *lp;
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{
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struct sun_disklabel *sl;
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struct partition *npp;
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struct sun_dkpart *spp;
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int i, secpercyl;
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u_short cksum, *sp1, *sp2;
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sl = (struct sun_disklabel *)cp;
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/* Verify the XOR check. */
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sp1 = (u_short *)sl;
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sp2 = (u_short *)(sl + 1);
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cksum = 0;
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while (sp1 < sp2)
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cksum ^= *sp1++;
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if (cksum != 0)
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return("SunOS disk label, bad checksum");
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/* Format conversion. */
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lp->d_magic = DISKMAGIC;
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lp->d_magic2 = DISKMAGIC;
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memcpy(lp->d_packname, sl->sl_text, sizeof(lp->d_packname));
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lp->d_secsize = 512;
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lp->d_nsectors = sl->sl_nsectors;
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lp->d_ntracks = sl->sl_ntracks;
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lp->d_ncylinders = sl->sl_ncylinders;
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secpercyl = sl->sl_nsectors * sl->sl_ntracks;
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lp->d_secpercyl = secpercyl;
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lp->d_secperunit = secpercyl * sl->sl_ncylinders;
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lp->d_sparespercyl = sl->sl_sparespercyl;
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lp->d_acylinders = sl->sl_acylinders;
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lp->d_rpm = sl->sl_rpm;
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lp->d_interleave = sl->sl_interleave;
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lp->d_npartitions = 8;
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/* These are as defined in <ufs/ffs/fs.h> */
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lp->d_bbsize = 8192; /* XXX */
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lp->d_sbsize = 8192; /* XXX */
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for (i = 0; i < 8; i++) {
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spp = &sl->sl_part[i];
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npp = &lp->d_partitions[i];
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npp->p_offset = spp->sdkp_cyloffset * secpercyl;
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npp->p_size = spp->sdkp_nsectors;
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if (npp->p_size == 0) {
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npp->p_fstype = FS_UNUSED;
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} else {
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npp->p_fstype = sun_fstypes[i];
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if (npp->p_fstype == FS_BSDFFS) {
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/*
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* The sun label does not store the FFS fields,
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* so just set them with default values here.
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*/
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npp->p_fsize = 1024;
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npp->p_frag = 8;
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npp->p_cpg = 16;
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}
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}
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}
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lp->d_checksum = 0;
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lp->d_checksum = dkcksum(lp);
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#ifdef NOTDEF_DEBUG
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printf("disklabel_sun_to_bsd: success!\n");
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#endif
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return (NULL);
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}
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/*
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* Find a valid disklabel.
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*/
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static char *
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search_label(devp, off, buf, lp, off0)
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struct of_dev *devp;
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u_long off;
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char *buf;
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struct disklabel *lp;
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u_long off0;
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{
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size_t read;
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struct mbr_partition *p;
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int i;
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u_long poff;
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static int recursion;
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struct disklabel *dlp;
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struct sun_disklabel *slp;
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int error;
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/* minimal requirements for archtypal disk label */
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if (lp->d_secperunit == 0)
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lp->d_secperunit = 0x1fffffff;
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lp->d_npartitions = 1;
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if (lp->d_partitions[0].p_size == 0)
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lp->d_partitions[0].p_size = 0x1fffffff;
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lp->d_partitions[0].p_offset = 0;
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if (strategy(devp, F_READ, LABELSECTOR, DEV_BSIZE, buf, &read)
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|| read != DEV_BSIZE)
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return ("Cannot read label");
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/* Check for a NetBSD disk label. */
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dlp = (struct disklabel *) (buf + LABELOFFSET);
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if (dlp->d_magic == DISKMAGIC) {
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if (dkcksum(dlp))
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return ("NetBSD disk label corrupted");
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*lp = *dlp;
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#ifdef NOTDEF_DEBUG
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printf("search_label: found NetBSD label\n");
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#endif
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return (NULL);
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}
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/* Check for a Sun disk label (for PROM compatibility). */
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slp = (struct sun_disklabel *) buf;
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if (slp->sl_magic == SUN_DKMAGIC)
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return (disklabel_sun_to_bsd(buf, lp));
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bzero(buf, sizeof(buf));
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return ("no disk label");
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}
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int
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devopen(of, name, file)
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struct open_file *of;
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const char *name;
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char **file;
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{
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char *cp;
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char partition;
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char fname[256];
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char buf[DEV_BSIZE];
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struct disklabel label;
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int handle, part;
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size_t read;
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char *errmsg = NULL;
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int error = 0;
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if (ofdev.handle != -1)
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panic("devopen");
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if (of->f_flags != F_READ)
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return EPERM;
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strcpy(fname, name);
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cp = filename(fname, &partition);
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if (cp) {
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strcpy(buf, cp);
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*cp = 0;
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}
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if (!cp || !*buf)
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strcpy(buf, DEFAULT_KERNEL);
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if (!*fname)
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strcpy(fname, bootdev);
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strcpy(opened_name, fname);
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if (partition) {
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cp = opened_name + strlen(opened_name);
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*cp++ = ':';
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*cp++ = partition;
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*cp = 0;
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}
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if (*buf != '/')
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strcat(opened_name, "/");
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strcat(opened_name, buf);
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*file = opened_name + strlen(fname) + 1;
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#ifdef NOTDEF_DEBUG
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printf("devopen: trying %s\n", fname);
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#endif
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if ((handle = OF_finddevice(fname)) == -1)
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return ENOENT;
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#ifdef NOTDEF_DEBUG
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printf("devopen: found %s\n", fname);
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#endif
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if (OF_getprop(handle, "name", buf, sizeof buf) < 0)
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return ENXIO;
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#ifdef NOTDEF_DEBUG
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printf("devopen: %s is called %s\n", fname, buf);
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#endif
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floppyboot = !strcmp(buf, "floppy");
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if (OF_getprop(handle, "device_type", buf, sizeof buf) < 0)
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return ENXIO;
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#ifdef NOTDEF_DEBUG
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printf("devopen: %s is a %s device\n", fname, buf);
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#endif
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#if 1
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if (!strcmp(buf, "block"))
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/* For block devices, indicate 1st partition (:a in OpenFirmware) */
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/* For block devices, indicate whole disk (:c in OpenFirmware) */
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/* For block devices, indicate raw partition (:0 in OpenFirmware) */
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strcat(fname, ":0");
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#endif
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#ifdef NOTDEF_DEBUG
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printf("devopen: opening %s\n", fname);
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#endif
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if ((handle = OF_open(fname)) == -1) {
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#ifdef NOTDEF_DEBUG
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printf("devopen: open of %s failed\n", fname);
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#endif
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return ENXIO;
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}
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#ifdef NOTDEF_DEBUG
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printf("devopen: %s is now open\n", fname);
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#endif
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bzero(&ofdev, sizeof ofdev);
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ofdev.handle = handle;
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if (!strcmp(buf, "block")) {
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ofdev.type = OFDEV_DISK;
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ofdev.bsize = DEV_BSIZE;
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/* First try to find a disklabel without MBR partitions */
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#ifdef NOTDEF_DEBUG
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printf("devopen: trying to read disklabel\n");
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#endif
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if (strategy(&ofdev, F_READ,
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LABELSECTOR, DEV_BSIZE, buf, &read) != 0
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|| read != DEV_BSIZE
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|| (errmsg = getdisklabel(buf, &label))) {
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if (errmsg) printf("devopen: getdisklabel sez %s\n", errmsg);
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/* Else try MBR partitions */
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errmsg = search_label(&ofdev, 0, buf, &label, 0);
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if (errmsg) {
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printf("devopen: search_label sez %s\n", errmsg);
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error = ERDLAB;
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}
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if (error && error != ERDLAB)
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goto bad;
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}
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if (error == ERDLAB) {
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if (partition)
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/* User specified a parititon, but there is none */
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goto bad;
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/* No, label, just use complete disk */
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ofdev.partoff = 0;
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} else {
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part = partition ? partition - 'a' : 0;
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ofdev.partoff = label.d_partitions[part].p_offset;
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}
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of->f_dev = devsw;
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of->f_devdata = &ofdev;
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#ifdef SPARC_BOOT_UFS
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bcopy(&file_system_ufs, &file_system[nfsys++], sizeof file_system[0]);
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#endif
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#ifdef SPARC_BOOT_HSFS
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bcopy(&file_system_cd9660, &file_system[nfsys++],
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sizeof file_system[0]);
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#endif
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#ifdef NOTDEF_DEBUG
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printf("devopen: return 0\n");
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#endif
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return 0;
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}
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#ifdef NETBOOT
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if (!strcmp(buf, "network")) {
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ofdev.type = OFDEV_NET;
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of->f_dev = devsw;
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of->f_devdata = &ofdev;
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bcopy(&file_system_nfs, file_system, sizeof file_system[0]);
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nfsys = 1;
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if (error = net_open(&ofdev))
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goto bad;
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return 0;
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}
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#endif
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error = EFTYPE;
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bad:
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#ifdef DEBUG
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printf("devopen: error %d, cannot open device\n", error);
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#endif
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OF_close(handle);
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ofdev.handle = -1;
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return error;
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}
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