- Fill dummy functions with code to read from disk using Open

   Firmware.
 - Add a temporary disklabel header to boot off a NetBSD/sparc64
   partition.  This file can be deleted when we have got a FCode
   bootblock.

The disklabel header was obtained from NetBSD.

2 files changed, 597 insertions, 6 deletions

diff --git a/sys/boot/ofw/libofw/disklabel.h b/sys/boot/ofw/libofw/disklabel.h
new file mode 100644
index 0000000..b095c6f
--- /dev/null
+++ b/sys/boot/ofw/libofw/disklabel.h
@@ -0,0 +1,492 @@
+/*	$NetBSD: disklabel.h,v 1.69 2001/04/03 20:25:22 ragge Exp $	*/
+
+/*
+ * Copyright (c) 1987, 1988, 1993
+ *	The Regents of the University of California.  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 the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 THE REGENTS OR CONTRIBUTORS 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.
+ *
+ *	@(#)disklabel.h	8.2 (Berkeley) 7/10/94
+ *	$FreeBSD$
+ */
+
+#ifndef _SYS_DISKLABEL_H_
+#define _SYS_DISKLABEL_H_
+
+/*
+ * We need <machine/types.h> for __HAVE_OLD_DISKLABEL
+ */
+#ifndef _LOCORE
+#include <sys/types.h>
+#endif
+
+/*
+ * Each disk has a label which includes information about the hardware
+ * disk geometry, filesystem partitions, and drive specific information.
+ * The location of the label, as well as the number of partitions the
+ * label can describe and the number of the "whole disk" (raw)
+ * paritition are machine dependent.
+ */
+#include <machine/disklabel.h>
+
+/*
+ * The absolute maximum number of disk partitions allowed.
+ * This is the maximum value of MAXPARTITIONS for which 'struct disklabel'
+ * is <= DEV_BSIZE bytes long.  If MAXPARTITIONS is greater than this, beware.
+ */
+#define	MAXMAXPARTITIONS	22
+#if MAXPARTITIONS > MAXMAXPARTITIONS
+#warning beware: MAXPARTITIONS bigger than MAXMAXPARTITIONS
+#endif
+
+/*
+ * Ports can switch their MAXPARTITIONS once, as follows:
+ *
+ * - define OLDMAXPARTITIONS in <machine/disklabel.h> as the old number
+ * - define MAXPARTITIONS as the new number
+ * - define DISKUNIT, DISKPART and DISKMINOR macros in <machine/disklabel.h>
+ *   as appropriate for the port (see the i386 one for an example).
+ * - define __HAVE_OLD_DISKLABEL in <machine/types.h>
+ */
+
+#if defined(_KERNEL) && defined(__HAVE_OLD_DISKLABEL) && \
+	   (MAXPARTITIONS < OLDMAXPARTITIONS)
+#error "can only grow disklabel size"
+#endif
+
+
+/*
+ * Translate between device numbers and major/disk unit/disk partition.
+ */
+#ifndef __HAVE_OLD_DISKLABEL
+#define	DISKUNIT(dev)	(minor(dev) / MAXPARTITIONS)
+#define	DISKPART(dev)	(minor(dev) % MAXPARTITIONS)
+#define	DISKMINOR(unit, part) \
+    (((unit) * MAXPARTITIONS) + (part))
+#endif
+#define	MAKEDISKDEV(maj, unit, part) \
+    (makedev((maj), DISKMINOR((unit), (part))))
+
+#define DISKMAGIC	((u_int32_t)0x82564557)	/* The disk magic number */
+
+#ifndef _LOCORE
+struct disklabel {
+	u_int32_t d_magic;		/* the magic number */
+	u_int16_t d_type;		/* drive type */
+	u_int16_t d_subtype;		/* controller/d_type specific */
+	char	  d_typename[16];	/* type name, e.g. "eagle" */
+
+	/*
+	 * d_packname contains the pack identifier and is returned when
+	 * the disklabel is read off the disk or in-core copy.
+	 * d_boot0 and d_boot1 are the (optional) names of the
+	 * primary (block 0) and secondary (block 1-15) bootstraps
+	 * as found in /usr/mdec.  These are returned when using
+	 * getdiskbyname(3) to retrieve the values from /etc/disktab.
+	 */
+	union {
+		char	un_d_packname[16];	/* pack identifier */
+		struct {
+			char *un_d_boot0;	/* primary bootstrap name */
+			char *un_d_boot1;	/* secondary bootstrap name */
+		} un_b;
+	} d_un;
+#define d_packname	d_un.un_d_packname
+#define d_boot0		d_un.un_b.un_d_boot0
+#define d_boot1		d_un.un_b.un_d_boot1
+
+			/* disk geometry: */
+	u_int32_t d_secsize;		/* # of bytes per sector */
+	u_int32_t d_nsectors;		/* # of data sectors per track */
+	u_int32_t d_ntracks;		/* # of tracks per cylinder */
+	u_int32_t d_ncylinders;		/* # of data cylinders per unit */
+	u_int32_t d_secpercyl;		/* # of data sectors per cylinder */
+	u_int32_t d_secperunit;		/* # of data sectors per unit */
+
+	/*
+	 * Spares (bad sector replacements) below are not counted in
+	 * d_nsectors or d_secpercyl.  Spare sectors are assumed to
+	 * be physical sectors which occupy space at the end of each
+	 * track and/or cylinder.
+	 */
+	u_int16_t d_sparespertrack;	/* # of spare sectors per track */
+	u_int16_t d_sparespercyl;	/* # of spare sectors per cylinder */
+	/*
+	 * Alternative cylinders include maintenance, replacement,
+	 * configuration description areas, etc.
+	 */
+	u_int32_t d_acylinders;		/* # of alt. cylinders per unit */
+
+			/* hardware characteristics: */
+	/*
+	 * d_interleave, d_trackskew and d_cylskew describe perturbations
+	 * in the media format used to compensate for a slow controller.
+	 * Interleave is physical sector interleave, set up by the
+	 * formatter or controller when formatting.  When interleaving is
+	 * in use, logically adjacent sectors are not physically
+	 * contiguous, but instead are separated by some number of
+	 * sectors.  It is specified as the ratio of physical sectors
+	 * traversed per logical sector.  Thus an interleave of 1:1
+	 * implies contiguous layout, while 2:1 implies that logical
+	 * sector 0 is separated by one sector from logical sector 1.
+	 * d_trackskew is the offset of sector 0 on track N relative to
+	 * sector 0 on track N-1 on the same cylinder.  Finally, d_cylskew
+	 * is the offset of sector 0 on cylinder N relative to sector 0
+	 * on cylinder N-1.
+	 */
+	u_int16_t d_rpm;		/* rotational speed */
+	u_int16_t d_interleave;		/* hardware sector interleave */
+	u_int16_t d_trackskew;		/* sector 0 skew, per track */
+	u_int16_t d_cylskew;		/* sector 0 skew, per cylinder */
+	u_int32_t d_headswitch;		/* head switch time, usec */
+	u_int32_t d_trkseek;		/* track-to-track seek, usec */
+	u_int32_t d_flags;		/* generic flags */
+#define NDDATA 5
+	u_int32_t d_drivedata[NDDATA];	/* drive-type specific information */
+#define NSPARE 5
+	u_int32_t d_spare[NSPARE];	/* reserved for future use */
+	u_int32_t d_magic2;		/* the magic number (again) */
+	u_int16_t d_checksum;		/* xor of data incl. partitions */
+
+			/* filesystem and partition information: */
+	u_int16_t d_npartitions;	/* number of partitions in following */
+	u_int32_t d_bbsize;		/* size of boot area at sn0, bytes */
+	u_int32_t d_sbsize;		/* max size of fs superblock, bytes */
+	struct	partition {		/* the partition table */
+		u_int32_t p_size;	/* number of sectors in partition */
+		u_int32_t p_offset;	/* starting sector */
+		u_int32_t p_fsize;	/* filesystem basic fragment size */
+		u_int8_t p_fstype;	/* filesystem type, see below */
+		u_int8_t p_frag;	/* filesystem fragments per block */
+		union {
+			u_int16_t cpg;	/* UFS: FS cylinders per group */
+			u_int16_t sgs;	/* LFS: FS segment shift */
+		} __partition_u1;
+#define	p_cpg	__partition_u1.cpg
+#define	p_sgs	__partition_u1.sgs
+	} d_partitions[MAXPARTITIONS];	/* actually may be more */
+};
+
+#ifdef __HAVE_OLD_DISKLABEL
+/*
+ * Same as above, but with OLDMAXPARTITIONS partitions. For use in
+ * the old DIOC* ioctl calls.
+ */
+struct olddisklabel {
+	u_int32_t d_magic;
+	u_int16_t d_type;
+	u_int16_t d_subtype;
+	char	  d_typename[16];
+	union {
+		char	un_d_packname[16];
+		struct {
+			char *un_d_boot0;
+			char *un_d_boot1;
+		} un_b;
+	} d_un;
+	u_int32_t d_secsize;
+	u_int32_t d_nsectors;
+	u_int32_t d_ntracks;
+	u_int32_t d_ncylinders;
+	u_int32_t d_secpercyl;
+	u_int32_t d_secperunit;
+	u_int16_t d_sparespertrack;
+	u_int16_t d_sparespercyl;
+	u_int32_t d_acylinders;
+	u_int16_t d_rpm;
+	u_int16_t d_interleave;
+	u_int16_t d_trackskew;
+	u_int16_t d_cylskew;
+	u_int32_t d_headswitch;
+	u_int32_t d_trkseek;
+	u_int32_t d_flags;
+	u_int32_t d_drivedata[NDDATA];
+	u_int32_t d_spare[NSPARE];
+	u_int32_t d_magic2;
+	u_int16_t d_checksum;
+	u_int16_t d_npartitions;
+	u_int32_t d_bbsize;
+	u_int32_t d_sbsize;
+	struct	opartition {
+		u_int32_t p_size;
+		u_int32_t p_offset;
+		u_int32_t p_fsize;
+		u_int8_t p_fstype;
+		u_int8_t p_frag;
+		union {
+			u_int16_t cpg;
+			u_int16_t sgs;
+		} __partition_u1;
+	} d_partitions[OLDMAXPARTITIONS];
+};
+#endif /* __HAVE_OLD_DISKLABEL */
+#else /* _LOCORE */
+	/*
+	 * offsets for asm boot files.
+	 */
+	.set	d_secsize,40
+	.set	d_nsectors,44
+	.set	d_ntracks,48
+	.set	d_ncylinders,52
+	.set	d_secpercyl,56
+	.set	d_secperunit,60
+	.set	d_end_,276		/* size of disk label */
+#endif /* _LOCORE */
+
+/* d_type values: */
+#define	DTYPE_SMD		1		/* SMD, XSMD; VAX hp/up */
+#define	DTYPE_MSCP		2		/* MSCP */
+#define	DTYPE_DEC		3		/* other DEC (rk, rl) */
+#define	DTYPE_SCSI		4		/* SCSI */
+#define	DTYPE_ESDI		5		/* ESDI interface */
+#define	DTYPE_ST506		6		/* ST506 etc. */
+#define	DTYPE_HPIB		7		/* CS/80 on HP-IB */
+#define	DTYPE_HPFL		8		/* HP Fiber-link */
+#define	DTYPE_FLOPPY		10		/* floppy */
+#define	DTYPE_CCD		11		/* concatenated disk device */
+#define	DTYPE_VND		12		/* vnode pseudo-disk */
+#define DTYPE_ATAPI		13		/* ATAPI */
+#define	DTYPE_RAID		14		/* RAIDframe */
+#define	DTYPE_LD		15		/* logical disk */
+
+#ifdef DKTYPENAMES
+static const char *const dktypenames[] = {
+	"unknown",
+	"SMD",
+	"MSCP",
+	"old DEC",
+	"SCSI",
+	"ESDI",
+	"ST506",
+	"HP-IB",
+	"HP-FL",
+	"type 9",
+	"floppy",
+	"ccd",
+	"vnd",
+	"ATAPI",
+	"RAID",
+	"ld",
+	NULL
+};
+#define DKMAXTYPES	(sizeof(dktypenames) / sizeof(dktypenames[0]) - 1)
+#endif
+
+/*
+ * Filesystem type and version.
+ * Used to interpret other filesystem-specific
+ * per-partition information.
+ */
+#define	FS_UNUSED	0		/* unused */
+#define	FS_SWAP		1		/* swap */
+#define	FS_V6		2		/* Sixth Edition */
+#define	FS_V7		3		/* Seventh Edition */
+#define	FS_SYSV		4		/* System V */
+#define	FS_V71K		5		/* V7 with 1K blocks (4.1, 2.9) */
+#define	FS_V8		6		/* Eighth Edition, 4K blocks */
+#define	FS_BSDFFS	7		/* 4.2BSD fast file system */
+#define	FS_MSDOS	8		/* MSDOS file system */
+#define	FS_BSDLFS	9		/* 4.4BSD log-structured file system */
+#define	FS_OTHER	10		/* in use, but unknown/unsupported */
+#define	FS_HPFS		11		/* OS/2 high-performance file system */
+#define	FS_ISO9660	12		/* ISO 9660, normally CD-ROM */
+#define	FS_BOOT		13		/* partition contains bootstrap */
+#define	FS_ADOS		14		/* AmigaDOS fast file system */
+#define	FS_HFS		15		/* Macintosh HFS */
+#define	FS_FILECORE	16		/* Acorn Filecore Filing System */
+#define	FS_EX2FS	17		/* Linux Extended 2 file system */
+#define	FS_NTFS		18		/* Windows/NT file system */
+#define	FS_RAID		19		/* RAIDframe component */
+#define	FS_CCD		20		/* concatenated disk component */
+
+#ifdef	FSTYPENAMES
+static const char *const fstypenames[] = {
+	"unused",
+	"swap",
+	"Version 6",
+	"Version 7",
+	"System V",
+	"4.1BSD",
+	"Eighth Edition",
+	"4.2BSD",
+	"MSDOS",
+	"4.4LFS",
+	"unknown",
+	"HPFS",
+	"ISO9660",
+	"boot",
+	"ADOS",
+	"HFS",
+	"FILECORE",
+	"Linux Ext2",
+	"NTFS",
+	"RAID",
+	"ccd",
+	NULL
+};
+#define FSMAXTYPES	(sizeof(fstypenames) / sizeof(fstypenames[0]) - 1)
+#endif
+
+#ifdef FSCKNAMES
+/* These are the names MOUNT_XXX from <sys/mount.h> */
+static const char *const fscknames[] = {
+	NULL,		/* unused */
+	NULL,		/* swap */
+	NULL,		/* Version 6 */
+	NULL,		/* Version 7 */
+	NULL,		/* System V */
+	NULL,		/* 4.1BSD */
+	NULL,		/* Eighth edition */
+	"ffs",		/* 4.2BSD */
+	"msdos",	/* MSDOS */
+	"lfs",		/* 4.4LFS */
+	NULL,		/* unknown */
+	NULL,		/* HPFS */
+	NULL,		/* ISO9660 */
+	NULL,		/* boot */
+	NULL,		/* ADOS */
+	NULL,		/* HFS */
+	NULL,		/* FILECORE */
+	"ext2fs",	/* Linux Ext2 */
+	NULL,		/* Windows/NT */
+	NULL,		/* RAID Component */
+	NULL,		/* concatenated disk component */
+	NULL		/* NULL */
+};
+#define FSMAXNAMES	(sizeof(fscknames) / sizeof(fscknames[0]) - 1)
+
+#endif
+
+#ifdef MOUNTNAMES
+/* These are the names MOUNT_XXX from <sys/mount.h> */
+static const char *const mountnames[] = {
+	NULL,		/* unused */
+	NULL,		/* swap */
+	NULL,		/* Version 6 */
+	NULL,		/* Version 7 */
+	NULL,		/* System V */
+	NULL,		/* 4.1BSD */
+	NULL,		/* Eighth edition */
+	"ffs",		/* 4.2BSD */
+	"msdos",	/* MSDOS */
+	"lfs",		/* 4.4LFS */
+	NULL,		/* unknown */
+	NULL,		/* HPFS */
+	"cd9660",	/* ISO9660 */
+	NULL,		/* boot */
+	"ados",		/* ADOS */
+	NULL,		/* HFS */
+	"filecore",	/* FILECORE */
+	"ext2fs",	/* Linux Ext2 */
+	"ntfs",		/* Windows/NT */
+	NULL,		/* RAID Component */
+	NULL,		/* concatenated disk component */
+	NULL		/* NULL */
+};
+#define FSMAXMOUNTNAMES	(sizeof(mountnames) / sizeof(mountnames[0]) - 1)
+
+#endif
+
+/*
+ * flags shared by various drives:
+ */
+#define		D_REMOVABLE	0x01		/* removable media */
+#define		D_ECC		0x02		/* supports ECC */
+#define		D_BADSECT	0x04		/* supports bad sector forw. */
+#define		D_RAMDISK	0x08		/* disk emulator */
+#define		D_CHAIN		0x10		/* can do back-back transfers */
+
+/*
+ * Drive data for SMD.
+ */
+#define	d_smdflags	d_drivedata[0]
+#define		D_SSE		0x1		/* supports skip sectoring */
+#define	d_mindist	d_drivedata[1]
+#define	d_maxdist	d_drivedata[2]
+#define	d_sdist		d_drivedata[3]
+
+/*
+ * Drive data for ST506.
+ */
+#define d_precompcyl	d_drivedata[0]
+#define d_gap3		d_drivedata[1]		/* used only when formatting */
+
+/*
+ * Drive data for SCSI.
+ */
+#define	d_blind		d_drivedata[0]
+
+#ifndef _LOCORE
+/*
+ * Structure used to perform a format or other raw operation,
+ * returning data and/or register values.  Register identification
+ * and format are device- and driver-dependent.
+ */
+struct format_op {
+	char	*df_buf;
+	int	 df_count;		/* value-result */
+	daddr_t	 df_startblk;
+	int	 df_reg[8];		/* result */
+};
+
+/*
+ * Structure used internally to retrieve information about a partition
+ * on a disk.
+ */
+struct partinfo {
+	struct disklabel *disklab;
+	struct partition *part;
+};
+
+#ifdef _KERNEL
+struct buf_queue;
+
+void	 diskerr
+	    __P((struct buf *, char *, char *, int, int, struct disklabel *));
+void	 disksort_cylinder __P((struct buf_queue *, struct buf *));
+void	 disksort_blkno __P((struct buf_queue *, struct buf *));
+void	 disksort_tail __P((struct buf_queue *, struct buf *));
+u_int	 dkcksum __P((struct disklabel *));
+int	 setdisklabel __P((struct disklabel *, struct disklabel *, u_long,
+	    struct cpu_disklabel *));
+char	*readdisklabel __P((dev_t, void (*)(struct buf *), struct disklabel *,
+	    struct cpu_disklabel *));
+int	 writedisklabel __P((dev_t, void (*)(struct buf *), struct disklabel *,
+	    struct cpu_disklabel *));
+int	 bounds_check_with_label __P((struct buf *, struct disklabel *, int));
+#endif
+#endif /* _LOCORE */
+
+#if !defined(_KERNEL) && !defined(_LOCORE)
+
+#include <sys/cdefs.h>
+
+#endif
+
+#endif /* !_SYS_DISKLABEL_H_ */
diff --git a/sys/boot/ofw/libofw/ofw_disk.c b/sys/boot/ofw/libofw/ofw_disk.c
index 81a3456..f8b9159 100644
--- a/sys/boot/ofw/libofw/ofw_disk.c
+++ b/sys/boot/ofw/libofw/ofw_disk.c
@@ -34,11 +34,16 @@
 
 #include <netinet/in.h>
 
+#include <machine/stdarg.h>
+
 #include <stand.h>
 
 #include "bootstrap.h"
 #include "libofw.h"
-#include "openfirm.h"
+
+#define	DISKSECSZ	512
+#define	DISKLABELSEC	0
+#define	DISKLABELOFF	128
 
 static int	ofwd_init(void);
 static int	ofwd_strategy(void *devdata, int flag, daddr_t dblk, 
@@ -46,6 +51,8 @@ static int	ofwd_strategy(void *devdata, int flag, daddr_t dblk,
 static int	ofwd_open(struct open_file *f, ...);
 static int	ofwd_close(struct open_file *f);
 static void	ofwd_print(int verbose);
+static char *	ofwd_getdevpath(int unit);
+int readdisklabel(struct ofw_devdesc *);
 
 struct devsw ofwdisk = {
 	"disk",
@@ -71,10 +78,21 @@ ofwd_init(void)
 	char devpath[255];
 	ihandle_t instance;
 
+	printf("ofwd_init: searching for block devices\n");
 	ofw_devsearch_init();
-	while((ret = ofw_devsearch("block", devpath)) != 0) {
-		if (ret == -1)
+	while ((ret = ofw_devsearch("block", devpath)) != 0) {
+		devpath[sizeof devpath - 1] = 0;
+		printf("ofwd_init: devpath=%s\n", devpath);
+		if (ret == -1) {
+			printf("ofwd_init: ret=%d\n", ret);
 			return (1);
+		}
+#ifdef DEBUG
+		printf("devpath=\"%s\" ret=%d\n", devpath, ret);
+#endif
+
+		if (strcmp(devpath, "/pci@1f,0/pci@1,1/ide@3/cdrom") == 0)
+			continue;
 
 		instance = OF_open(devpath);
 		if (instance != -1) {
@@ -91,6 +109,7 @@ ofwd_init(void)
 		}
 	}
 
+	printf("ofwd_init: return (0)\n");
 	return (0);
 }
 
@@ -98,19 +117,87 @@ static int
 ofwd_strategy(void *devdata, int flag, daddr_t dblk, size_t size, char *buf,
     size_t *rsize)
 {
-	return (0);
+	struct ofw_devdesc *dp = (struct ofw_devdesc *)devdata;
+	unsigned long pos;
+	int n;
+	int i, j;
+
+	pos = (dp->d_kind.ofwdisk.partoff + dblk) * dp->d_kind.ofwdisk.bsize;
+
+	do {
+		if (OF_seek(dp->d_kind.ofwdisk.handle, pos) < 0) {
+			return EIO;
+		}
+		n = OF_read(dp->d_kind.ofwdisk.handle, buf, size);
+		if (n < 0 && n != -2) {
+			return EIO;
+		}
+	} while (n == -2);
+
+	*rsize = size;
+	return 0;
 }
 
 static int
 ofwd_open(struct open_file *f, ...)
 {
-	return (0);
+	va_list vl;
+	struct ofw_devdesc *dp;
+	char *devpath;
+	phandle_t diskh;
+	char buf[8192];
+	int i, j;
+
+	va_start(vl, f);
+	dp = va_arg(vl, struct ofw_devdesc *);
+	va_end(vl);
+
+	devpath = ofwd_getdevpath(dp->d_kind.ofwdisk.unit);
+	if ((diskh = OF_open(devpath)) == -1) {
+		printf("ofwd_open: Could not open %s\n", devpath);
+		return 1;
+	}
+	dp->d_kind.ofwdisk.bsize = DISKSECSZ;
+	dp->d_kind.ofwdisk.handle = diskh;
+	readdisklabel(dp);
+	
+	return 0;
+}
+
+/* XXX This is a NetBSD header! */
+#include "disklabel.h"
+int
+readdisklabel(struct ofw_devdesc *dp)
+{
+	char buf[DISKSECSZ];
+	struct partition *p;
+	struct disklabel *lp;
+	size_t size;
+	int i;
+
+	dp->d_kind.ofwdisk.partoff = 0;
+
+	dp->d_dev->dv_strategy(dp, 0, DISKLABELSEC, sizeof(buf), buf, &size);
+
+	lp = (struct disklabel *)(buf + DISKLABELOFF);
+	p = lp->d_partitions;
+	for (i = 0; i < MAXPARTITIONS; i++) {
+		if (i == dp->d_kind.ofwdisk.partition) {
+			dp->d_kind.ofwdisk.partoff = p->p_offset;
+			return 0;
+		}
+		p++;
+	}
+	return 1;
 }
 
 static int
 ofwd_close(struct open_file *f)
 {
-	return (0);
+	struct ofw_devdesc *dev = f->f_devdata;
+	OF_close(dev->d_kind.ofwdisk.handle);
+
+	return 0;
 }
 
 static void
@@ -139,3 +226,15 @@ ofwd_getunit(const char *path)
 
 	return -1;
 }
+
+static char *
+ofwd_getdevpath(int unit)
+{
+	int i;
+
+	for (i = 0; i < nofwdinfo; i++) {
+		if (ofwdinfo[i].ofwd_unit == unit)
+			return ofwdinfo[i].ofwd_path;
+	}
+	return 0;
+}