126 lines
3.5 KiB
C
126 lines
3.5 KiB
C
/* $NetBSD: dk.c,v 1.1 2014/02/24 07:23:43 skrll Exp $ */
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/* $OpenBSD: dk.c,v 1.5 1999/04/20 20:01:01 mickey Exp $ */
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/*
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* Copyright 1996 1995 by Open Software Foundation, Inc.
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* All Rights Reserved
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*
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* Permission to use, copy, modify, and distribute this software and
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* its documentation for any purpose and without fee is hereby granted,
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* provided that the above copyright notice appears in all copies and
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* that both the copyright notice and this permission notice appear in
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* supporting documentation.
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*
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* OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE.
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*
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* IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
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* NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
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* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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*/
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#include "libsa.h"
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#include <sys/param.h>
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#include <sys/disklabel.h>
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#include <sys/reboot.h>
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#include <machine/pdc.h>
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#include <machine/iomod.h>
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#include "dev_hppa.h"
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const char *dk_disklabel(struct hppa_dev *, struct disklabel *);
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iodcio_t dkiodc; /* boot IODC entry point */
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const char *
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dk_disklabel(struct hppa_dev *dp, struct disklabel *label)
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{
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char buf[DEV_BSIZE];
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size_t ret;
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if (iodcstrategy(dp, F_READ, LABELSECTOR, DEV_BSIZE, buf, &ret) ||
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ret != DEV_BSIZE)
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return "can't read disklabel";
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return (getdisklabel(buf, label));
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}
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int
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dkopen(struct open_file *f, ...)
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{
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struct disklabel dkl;
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struct hppa_dev *dp = f->f_devdata;
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const char *st;
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u_int i;
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#ifdef DEBUG
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if (debug)
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printf("dkopen(%p)\n", f);
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#endif
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if (!(dp->pz_dev = pdc_findev(-1, PCL_RANDOM)))
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return ENXIO;
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dp->part_off = 0;
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st = NULL;
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#ifdef DEBUG
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if (debug)
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printf ("disklabel\n");
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#endif
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if ((st = dk_disklabel(dp, &dkl)) != NULL) {
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#ifdef DEBUG
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if (debug)
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printf ("dkopen: %s\n", st);
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#endif
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/*
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* Ignore disklabel errors for this two reasons:
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* 1. It is possible to dd(1) a LIF image containing the bootloader
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* and a kernel with attached RAM disk to disk and boot it. That way
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* the netboot installation LIF image is also usable as disk boot
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* image.
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* 2. Some old 700 machines report a wrong device class in
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* PAGE0->mem_boot.pz_class when net booting. (PCL_RANDOM instead
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* PCL_NET_MASK|PCL_SEQU) So the bootloader thinks it is booting
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* from disk when it is actually net booting. The net boot LIF image
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* contains no disklabel so the test for the disklabel will fail.
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* If the device open fails if there is no disklabel we are not able
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* to netboot those machines.
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* Therefore the error is ignored. The bootloader will fall back to
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* LIF later when there is no disklabel / FFS partition.
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* At the moment it doesn't matter that the wrong device type ("dk"
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* instead "lf") is used, as all I/O is abstracted by the firmware.
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* To get the correct device type it would be necessary to add a
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* quirk table to the switch() in dev_hppa.c:devboot().
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*/
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} else {
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i = B_PARTITION(dp->bootdev);
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#ifdef DEBUG
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if (debug)
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printf("bootdev 0x%x, partition %u\n", dp->bootdev, i);
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#endif
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if (i >= dkl.d_npartitions || !dkl.d_partitions[i].p_size) {
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return (EPART);
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}
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dp->part_off = dkl.d_partitions[i].p_offset * dkl.d_secsize;
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}
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#ifdef DEBUGBUG
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if (debug)
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printf ("dkopen() ret\n");
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#endif
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return (0);
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}
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int
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dkclose(struct open_file *f)
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{
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dealloc(f->f_devdata, sizeof(struct hppa_dev));
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f->f_devdata = NULL;
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return 0;
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}
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