sys/arch/zaurus/stand/zboot/devopen.c

   1 /*      $NetBSD$        */
   2
   3 /*-
   4  *  Copyright (c) 1993 John Brezak
   5  *  All rights reserved.
   6  *
   7  *  Redistribution and use in source and binary forms, with or without
   8  *  modification, are permitted provided that the following conditions
   9  *  are met:
  10  *  1. Redistributions of source code must retain the above copyright
  11  *     notice, this list of conditions and the following disclaimer.
  12  *  2. Redistributions in binary form must reproduce the above copyright
  13  *     notice, this list of conditions and the following disclaimer in the
  14  *     documentation and/or other materials provided with the distribution.
  15  *  3. The name of the author may not be used to endorse or promote products
  16  *     derived from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR
  19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  20  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  21  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
  22  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  23  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  24  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  26  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  27  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #include <sys/param.h>
  32 #include <sys/disklabel.h>
  33
  34 #include "boot.h"
  35 #include "bootinfo.h"
  36 #include "disk.h"
  37 #include "unixdev.h"
  38
  39 static int dev2bios(char *devname, unsigned int unit, int *biosdev);
  40 static int devlookup(char *d);
  41
  42 static int
  43 dev2bios(char *devname, unsigned int unit, int *biosdev)
  44 {
  45
  46         if (strcmp(devname, devname_hd) == 0) {
  47                 *biosdev = 0x80 + unit;
  48                 return 0;
  49         } else if (strcmp(devname, devname_mmcd) == 0) {
  50                 *biosdev = 0x00 + unit;
  51                 return 0;
  52         }
  53         return ENXIO;
  54 }
  55
  56 static int
  57 devlookup(char *d)
  58 {
  59         struct devsw *dp = devsw;
  60         int i;
  61
  62         for (i = 0; i < ndevs; i++, dp++) {
  63                 if ((dp->dv_name != NULL) && (strcmp(dp->dv_name, d) == 0)) {
  64                         return i;
  65                 }
  66         }
  67
  68         printf("No such device - Configured devices are:\n");
  69         for (dp = devsw, i = 0; i < ndevs; i++, dp++) {
  70                 if (dp->dv_name != NULL) {
  71                         printf(" %s", dp->dv_name);
  72                 }
  73         }
  74         printf("\n");
  75         return -1;
  76 }
  77
  78 int
  79 devopen(struct open_file *f, const char *fname, char **file)
  80 {
  81         struct devsw *dp;
  82         char *fsname, *devname;
  83         unsigned int dev, ctlr, unit, partition;
  84         int biosdev;
  85         int error;
  86
  87 #if defined(UNIX_DEBUG)
  88         printf("devopen: fname = %s\n", fname ? fname : "(null)");
  89 #endif
  90
  91         ctlr = 0;
  92         if ((error = parsebootfile(fname, &fsname, &devname, &unit, &partition,
  93             (const char **)file)) != 0) {
  94                 return error;
  95         }
  96
  97 #if defined(UNIX_DEBUG)
  98         printf("devopen: devname = %s\n", devname);
  99 #endif
 100         dev = devlookup(devname);
 101         if (dev == -1) {
 102 #if defined(UNIX_DEBUG)
 103                 printf("devopen: devlookup failed\n");
 104 #endif
 105                 return ENXIO;
 106         }
 107
 108         dp = &devsw[dev];
 109         if (dp->dv_open == NULL) {
 110 #if defined(UNIX_DEBUG)
 111                 printf("devopen: dev->dv_open() == NULL\n");
 112 #endif
 113                 return ENODEV;
 114         }
 115         f->f_dev = dp;
 116
 117         if (dev2bios(devname, unit, &biosdev) == 0) {
 118 #if defined(UNIX_DEBUG)
 119                 printf("devopen: bios disk\n");
 120 #endif
 121                 return (unixopen(f, biosdev, devname, unit, partition, *file));
 122         }
 123
 124 #if defined(UNIX_DEBUG)
 125         printf("devopen: dev->dv_open()\n");
 126 #endif
 127         if ((error = (*dp->dv_open)(f, ctlr, unit, partition)) == 0) {
 128 #if defined(UNIX_DEBUG)
 129                 printf("devopen: dev->dv_open() opened\n");
 130 #endif
 131                 return 0;
 132         }
 133
 134         printf("%s%d%c:%s : %s\n", dp->dv_name, unit, partition + 'a', *file,
 135             strerror(error));
 136         return error;
 137 }