sys/arch/arc/stand/boot/devopen.c

   1 /*      $NetBSD: devopen.c,v 1.2.10.1 2005/11/10 13:55:09 skrll Exp $   */
   2
   3 /*-
   4  * Copyright (c) 1992, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Ralph Campbell.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  *      @(#)devopen.c   8.1 (Berkeley) 6/10/93
  35  */
  36
  37 #include <lib/libsa/stand.h>
  38 #include <lib/libkern/libkern.h>
  39
  40 /*
  41  * Decode the string 'fname', open the device and return the remaining
  42  * file name if any.
  43  */
  44 int
  45 devopen(struct open_file *f, const char *fname, char **file)
  46 {
  47         int error;
  48         char namebuf[128];
  49         char devtype[16];
  50         const char *cp;
  51         char *ncp;
  52 #if !defined(LIBSA_SINGLE_DEVICE)
  53         int i;
  54         struct devsw *dp;
  55 #endif
  56
  57         cp = fname;
  58         ncp = (char *)fname;
  59
  60 #ifdef arc
  61         /*
  62          * Look for "fdisk" (floppy disk?) or "rdisk" (rigid disk?) strings
  63          * in OSLOADPARTITION like the following:
  64          *  'scsi(0)disk(0)rdisk()partition(2)netbsd'   (jazzio scsi disk)
  65          *  'scsi(1)cdrom(1)fdisk()netbsd.arc'          (jazzio scsi cdrom)
  66          *  'multi(0)disk(0)fdisk()netbsd'              (floppy disk)
  67          *  'eisa(0)scsi(0)disk(0)rdisk()partition(2)netbsd' (eisa raid)
  68          * etc. (the file can either be a relative path or an abosolute path).
  69          */
  70         for (;;) {
  71                 if (strncmp(cp, "rdisk", 5) == 0 ||
  72                     strncmp(cp, "fdisk", 5) == 0) {
  73                         strcpy(devtype, "disk");
  74                         break;
  75                 }
  76                 while (*ncp && *ncp++ != ')')
  77                         ;
  78                 if (*ncp)
  79                         cp = ncp;
  80                 else
  81                         return ENXIO;
  82         }
  83 #endif
  84 #ifdef sgimips
  85         /*
  86          * If device starts with a PCI bus specifier, skip past it so the
  87          * device-matching code below gets the actual device type. Leave
  88          * fname as is, since it'll be passed back to ARCS to open the
  89          * device.  This is necessary for the IP32.
  90          */
  91         if (strncmp(cp, "pci", 3) == 0) {
  92                 while (*ncp && *ncp++ != ')')
  93                         ;
  94                 if (*ncp)
  95                         cp = ncp;
  96         }
  97
  98         /*
  99          * Look for a string like 'scsi(0)disk(0)rdisk(0)partition(0)netbsd'
 100          * or 'dksc(0,0,0)/netbsd' (the file can either be a relative path
 101          * or an abosolute path).
 102          */
 103         if (strncmp(cp, "scsi", 4) == 0) {
 104                 strcpy(devtype, "disk");
 105         } else if (strncmp(cp, "dksc", 4) == 0) {
 106                 strcpy(devtype, "disk");
 107         } else
 108                 return ENXIO;
 109 #endif
 110
 111         while (ncp != NULL && *ncp != 0) {
 112                 while (*ncp && *ncp++ != ')')
 113                         ;
 114                 if (*ncp)
 115                         cp = ncp;
 116         }
 117
 118         strncpy(namebuf, fname, sizeof(namebuf));
 119         namebuf[cp - fname] = 0;
 120
 121         printf("devopen: %s type %s file %s\n", namebuf, devtype, cp);
 122 #ifdef LIBSA_SINGLE_DEVICE
 123         error = DEV_OPEN(dp)(f, fname);
 124 #else /* !LIBSA_SINGLE_DEVICE */
 125         for (dp = devsw, i = 0; i < ndevs; dp++, i++)
 126                 if (dp->dv_name && strcmp(devtype, dp->dv_name) == 0)
 127                         goto found;
 128         printf("Unknown device '%s'\nKnown devices are:", devtype);
 129         for (dp = devsw, i = 0; i < ndevs; dp++, i++)
 130                 if (dp->dv_name)
 131                         printf(" %s", dp->dv_name);
 132         printf("\n");
 133         return ENXIO;
 134
 135  found:
 136         error = (dp->dv_open)(f, namebuf);
 137 #endif /* !LIBSA_SINGLE_DEVICE */
 138         if (error)
 139                 return error;
 140
 141 #ifndef LIBSA_SINGLE_DEVICE
 142         f->f_dev = dp;
 143 #endif
 144         if (file && *cp != '\0')
 145                 *file = (char *)cp;     /* XXX */
 146         return 0;
 147 }