1/* $NetBSD: dk.c,v 1.10 2009/05/08 09:33:59 skrll Exp $ */ 2 3/* $OpenBSD: dk.c,v 1.5 1999/04/20 20:01:01 mickey Exp $ */ 4 5/* 6 * Copyright 1996 1995 by Open Software Foundation, Inc. 7 * All Rights Reserved 8 * 9 * Permission to use, copy, modify, and distribute this software and 10 * its documentation for any purpose and without fee is hereby granted, 11 * provided that the above copyright notice appears in all copies and 12 * that both the copyright notice and this permission notice appear in 13 * supporting documentation. 14 * 15 * OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE 16 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 17 * FOR A PARTICULAR PURPOSE. 18 * 19 * IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR 20 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 21 * LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT, 22 * NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION 23 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 24 * 25 */ 26 27#include "libsa.h" 28 29#include <sys/param.h> 30#include <sys/disklabel.h> 31#include <sys/reboot.h> 32#include <machine/pdc.h> 33#include <machine/iomod.h> 34 35#include "dev_hppa.h" 36 37const char *dk_disklabel(struct hppa_dev *, struct disklabel *); 38 39iodcio_t dkiodc; /* boot IODC entry point */ 40 41const char * 42dk_disklabel(struct hppa_dev *dp, struct disklabel *label) 43{ 44 char buf[DEV_BSIZE]; 45 size_t ret; 46 47 if (iodcstrategy(dp, F_READ, LABELSECTOR, DEV_BSIZE, buf, &ret) || 48 ret != DEV_BSIZE) 49 return "can't read disklabel"; 50 51 return (getdisklabel(buf, label)); 52} 53 54int 55dkopen(struct open_file *f, ...) 56{ 57 struct disklabel dkl; 58 struct hppa_dev *dp = f->f_devdata; 59 const char *st; 60 u_int i; 61 62#ifdef DEBUG 63 if (debug) 64 printf("dkopen(%p)\n", f); 65#endif 66 67 if (!(dp->pz_dev = pdc_findev(-1, PCL_RANDOM))) 68 return ENXIO; 69 70 dp->part_off = 0; 71 st = NULL; 72#ifdef DEBUG 73 if (debug) 74 printf ("disklabel\n"); 75#endif 76 if ((st = dk_disklabel(dp, &dkl)) != NULL) { 77#ifdef DEBUG 78 if (debug) 79 printf ("dkopen: %s\n", st); 80#endif 81 /* 82 * Ignore disklabel errors for this two reasons: 83 * 1. It is possible to dd(1) a LIF image containing the bootloader 84 * and a kernel with attached RAM disk to disk and boot it. That way 85 * the netboot installation LIF image is also usable as disk boot 86 * image. 87 * 2. Some old 700 machines report a wrong device class in 88 * PAGE0->mem_boot.pz_class when net booting. (PCL_RANDOM instead 89 * PCL_NET_MASK|PCL_SEQU) So the bootloader thinks it is booting 90 * from disk when it is actually net booting. The net boot LIF image 91 * contains no disklabel so the test for the disklabel will fail. 92 * If the device open fails if there is no disklabel we are not able 93 * to netboot those machines. 94 * Therefore the error is ignored. The bootloader will fall back to 95 * LIF later when there is no disklabel / FFS partition. 96 * At the moment it doesn't matter that the wrong device type ("dk" 97 * instead "lf") is used, as all I/O is abstracted by the firmware. 98 * To get the correct device type it would be necessary to add a 99 * quirk table to the switch() in dev_hppa.c:devboot(). 100 */ 101 } else { 102 i = B_PARTITION(dp->bootdev); 103#ifdef DEBUG 104 if (debug) 105 printf("bootdev 0x%x, partition %u\n", dp->bootdev, i); 106#endif 107 if (i >= dkl.d_npartitions || !dkl.d_partitions[i].p_size) { 108 return (EPART); 109 } 110 dp->part_off = dkl.d_partitions[i].p_offset * dkl.d_secsize; 111 } 112#ifdef DEBUGBUG 113 if (debug) 114 printf ("dkopen() ret\n"); 115#endif 116 return (0); 117} 118 119int 120dkclose(struct open_file *f) 121{ 122 dealloc(f->f_devdata, sizeof(struct hppa_dev)); 123 f->f_devdata = NULL; 124 return 0; 125} 126