File: [local] / sys / arch / sgi / sgi / disksubr.c (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:07:50 2008 UTC (16 years, 6 months ago) by nbrk
Branch: OPENBSD_4_2_BASE, MAIN
CVS Tags: jornada-partial-support-wip, HEAD Changes since 1.1: +0 -0 lines
Import of OpenBSD 4.2 release kernel tree with initial code to support
Jornada 720/728, StrongARM 1110-based handheld PC.
At this point kernel roots on NFS and boots into vfs_mountroot() and traps.
What is supported:
- glass console, Jornada framebuffer (jfb) works in 16bpp direct color mode
(needs some palette tweaks for non black/white/blue colors, i think)
- saic, SA11x0 interrupt controller (needs cleanup)
- sacom, SA11x0 UART (supported only as boot console for now)
- SA11x0 GPIO controller fully supported (but can't handle multiple interrupt
handlers on one gpio pin)
- sassp, SSP port on SA11x0 that attaches spibus
- Jornada microcontroller (jmcu) to control kbd, battery, etc throught
the SPI bus (wskbd attaches on jmcu, but not tested)
- tod functions seem work
- initial code for SA-1111 (chip companion) : this is TODO
Next important steps, i think:
- gpio and intc on sa1111
- pcmcia support for sa11x0 (and sa1111 help logic)
- REAL root on nfs when we have PCMCIA support (we may use any of supported pccard NICs)
- root on wd0! (using already supported PCMCIA-ATA)
|
/* $OpenBSD: disksubr.c,v 1.3 2007/07/10 15:44:23 miod Exp $ */
/*
* Copyright (c) 1999 Michael Shalayeff
* Copyright (c) 1997 Niklas Hallqvist
* Copyright (c) 1996 Theo de Raadt
* Copyright (c) 1982, 1986, 1988 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. 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.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/device.h>
#include <sys/disklabel.h>
#include <sys/syslog.h>
#include <sys/disk.h>
char *readbsdlabel(struct buf *, void (*)(struct buf *), int, int,
int, struct disklabel *, int);
char *readsgilabel(struct buf *, void (*)(struct buf *),
struct disklabel *, int *, int);
/*
* Try to read a standard BSD disklabel at a certain sector.
*/
char *
readbsdlabel(struct buf *bp, void (*strat)(struct buf *),
int cyl, int sec, int off, struct disklabel *lp,
int spoofonly)
{
/* don't read the on-disk label if we are in spoofed-only mode */
if (spoofonly)
return (NULL);
bp->b_blkno = sec;
bp->b_bcount = lp->d_secsize;
bp->b_flags = B_BUSY | B_READ;
(*strat)(bp);
/* if successful, locate disk label within block and validate */
if (biowait(bp))
return ("disk label I/O error");
return checkdisklabel(bp->b_data + LABELOFFSET, lp);
}
/*
* Attempt to read a disk label from a device
* using the indicated strategy routine.
* The label must be partly set up before this:
* secpercyl, secsize and anything required for a block i/o read
* operation in the driver's strategy/start routines
* must be filled in before calling us.
*
* Returns null on success and an error string on failure.
*/
char *
readdisklabel(dev_t dev, void (*strat)(struct buf *),
struct disklabel *lp, int spoofonly)
{
struct buf *bp = NULL;
char *msg;
if ((msg = initdisklabel(lp)))
goto done;
/* get a buffer and initialize it */
bp = geteblk((int)lp->d_secsize);
bp->b_dev = dev;
msg = readsgilabel(bp, strat, lp, 0, spoofonly);
if (msg == NULL)
goto done;
msg = readdoslabel(bp, strat, lp, 0, spoofonly);
if (msg == NULL)
goto done;
#if defined(CD9660)
if (iso_disklabelspoof(dev, strat, lp) == 0) {
msg = NULL;
goto done;
}
#endif
#if defined(UDF)
if (udf_disklabelspoof(dev, strat, lp) == 0) {
msg = NULL;
goto done;
}
#endif
done:
if (bp) {
bp->b_flags |= B_INVAL;
brelse(bp);
}
return (msg);
}
static struct {
int m;
int b;
} maptab[] = {
{ 0, FS_BSDFFS}, { 1, FS_SWAP}, { 10, FS_BSDFFS},
{ 3, FS_BSDFFS}, { 4, FS_BSDFFS}, { 5, FS_BSDFFS},
{ 6, FS_BSDFFS}, { 7, FS_BSDFFS}, { 15, FS_OTHER},
{ 9, FS_BSDFFS}, { 2, FS_UNUSED}, { 11, FS_BSDFFS},
{ 12, FS_BSDFFS}, { 13, FS_BSDFFS}, { 14, FS_BSDFFS},
{ 8, FS_BSDFFS}
};
char *
readsgilabel(struct buf *bp, void (*strat)(struct buf *),
struct disklabel *lp, int *partoffp, int spoofonly)
{
struct sgilabel *dlp;
char *msg = NULL;
int i, *p, cs = 0;
int fsoffs = 0;
bp->b_blkno = 0;
bp->b_bcount = lp->d_secsize;
bp->b_flags = B_BUSY | B_READ;
(*strat)(bp);
/* if successful, locate disk label within block and validate */
if (biowait(bp)) {
msg = "disk label I/O error";
goto done;
}
dlp = (struct sgilabel *)(bp->b_data + LABELOFFSET);
if (dlp->magic != htobe32(SGILABEL_MAGIC)) {
fsoffs = 0;
goto finished;
}
if (dlp->partitions[0].blocks == 0) {
msg = "no BSD partition";
goto done;
}
fsoffs = dlp->partitions[0].first;
if (spoofonly)
goto finished;
p = (int *)dlp;
i = sizeof(struct sgilabel) / sizeof(int);
while (i--)
cs += *p++;
if (cs != 0) {
msg = "sgilabel checksum error";
goto done;
}
/* Set up partitions i-l if there is no BSD label. */
lp->d_secsize = dlp->dp.dp_secbytes;
lp->d_nsectors = dlp->dp.dp_secs;
lp->d_ntracks = dlp->dp.dp_trks0;
lp->d_ncylinders = dlp->dp.dp_cyls;
lp->d_interleave = dlp->dp.dp_interleave;
lp->d_npartitions = MAXPARTITIONS;
for (i = 0; i < 16; i++) {
int bsd = maptab[i].m;
DL_SETPOFFSET(&lp->d_partitions[bsd],
dlp->partitions[i].first);
DL_SETPSIZE(&lp->d_partitions[bsd],
dlp->partitions[i].blocks);
lp->d_partitions[bsd].p_fstype = maptab[i].b;
if (lp->d_partitions[bsd].p_fstype == FS_BSDFFS) {
lp->d_partitions[bsd].p_fragblock =
DISKLABELV1_FFS_FRAGBLOCK(1024, 8);
lp->d_partitions[bsd].p_cpg = 16;
}
}
lp->d_version = 1;
lp->d_flags = D_VENDOR;
lp->d_checksum = 0;
lp->d_checksum = dkcksum(lp);
finished:
if (partoffp)
*partoffp = fsoffs;
if (spoofonly)
goto done;
bp->b_blkno = fsoffs + LABELSECTOR;
bp->b_bcount = lp->d_secsize;
bp->b_flags = B_BUSY | B_READ;
(*strat)(bp);
if (biowait(bp)) {
msg = "disk label I/O error";
goto done;
}
return checkdisklabel(bp->b_data + LABELOFFSET, lp);
done:
return (msg);
}
/*
* Write disk label back to device after modification.
*/
int
writedisklabel(dev_t dev, void (*strat)(struct buf *), struct disklabel *lp)
{
int error = EIO, partoff = -1;
struct buf *bp = NULL;
struct disklabel *dlp;
/* get a buffer and initialize it */
bp = geteblk((int)lp->d_secsize);
bp->b_dev = dev;
if (readsgilabel(bp, strat, lp, &partoff, 1) != NULL &&
readdoslabel(bp, strat, lp, &partoff, 1) != NULL)
goto done;
/* Read it in, slap the new label in, and write it back out */
bp->b_blkno = partoff + LABELSECTOR;
bp->b_bcount = lp->d_secsize;
bp->b_flags = B_BUSY | B_READ;
(*strat)(bp);
if ((error = biowait(bp)) != 0)
goto done;
dlp = (struct disklabel *)(bp->b_data + LABELOFFSET);
*dlp = *lp;
bp->b_flags = B_BUSY | B_WRITE;
(*strat)(bp);
error = biowait(bp);
done:
if (bp) {
bp->b_flags |= B_INVAL;
brelse(bp);
}
return (error);
}