Annotation of sys/arch/hp300/stand/cdboot/devopen.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: devopen.c,v 1.3 2006/08/17 06:31:10 miod Exp $ */
! 2: /* $NetBSD: devopen.c,v 1.7 1996/10/14 07:31:47 thorpej Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 1996 Jason R. Thorpe. All rights reserved.
! 6: * Copyright (c) 1993 John Brezak
! 7: * All rights reserved.
! 8: *
! 9: * Redistribution and use in source and binary forms, with or without
! 10: * modification, are permitted provided that the following conditions
! 11: * are met:
! 12: * 1. Redistributions of source code must retain the above copyright
! 13: * notice, this list of conditions and the following disclaimer.
! 14: * 2. Redistributions in binary form must reproduce the above copyright
! 15: * notice, this list of conditions and the following disclaimer in the
! 16: * documentation and/or other materials provided with the distribution.
! 17: * 3. The name of the author may not be used to endorse or promote products
! 18: * derived from this software without specific prior written permission.
! 19: *
! 20: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR
! 21: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
! 22: * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
! 23: * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
! 24: * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
! 25: * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
! 26: * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
! 28: * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
! 29: * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 30: * POSSIBILITY OF SUCH DAMAGE.
! 31: */
! 32:
! 33: #include <sys/param.h>
! 34: #include <sys/reboot.h>
! 35:
! 36: #include <lib/libsa/stand.h>
! 37:
! 38: #include "samachdep.h"
! 39:
! 40: int atoi(char *);
! 41: int devlookup(const char*, int);
! 42: int devparse(const char *, int *, int *, int *, int *, int *, char **);
! 43: void usage(void);
! 44:
! 45: u_int opendev;
! 46:
! 47: #define ispart(c) ((c) >= 'a' && (c) <= 'h')
! 48:
! 49: int
! 50: atoi(char *cp)
! 51: {
! 52: int val = 0;
! 53: while(isdigit(*cp))
! 54: val = val * 10 + (*cp++ - '0');
! 55: return(val);
! 56: }
! 57:
! 58: void
! 59: usage()
! 60: {
! 61: printf("Usage: device(adaptor, controller, drive, partition)file\n"
! 62: " <device><unit><partitionletter>:file\n");
! 63: }
! 64:
! 65: int
! 66: devlookup(const char *d, int len)
! 67: {
! 68: struct devsw *dp = devsw;
! 69: int i;
! 70:
! 71: for (i = 0; i < ndevs; i++, dp++) {
! 72: if (dp->dv_name && strncmp(dp->dv_name, d, len) == 0) {
! 73: /*
! 74: * Set the filesystem and startup up according to
! 75: * the device being opened.
! 76: */
! 77: switch (i) {
! 78: case 4: /* sd - only supports cd9660 */
! 79: bcopy(file_system_cd9660, file_system,
! 80: sizeof(struct fs_ops));
! 81: break;
! 82:
! 83: case 0: /* ct - not supported */
! 84: case 2: /* hd - not supported */
! 85: case 6: /* le - not supported */
! 86: default:
! 87: /* Agh! What happened?! */
! 88: goto bad;
! 89: }
! 90: return(i);
! 91: }
! 92: }
! 93:
! 94: bad:
! 95: printf("No such device - Configured devices are:\n");
! 96: for (dp = devsw, i = 0; i < ndevs; i++, dp++)
! 97: if (dp->dv_name)
! 98: printf(" %s", dp->dv_name);
! 99: printf("\n");
! 100: errno = ENODEV;
! 101: return(-1);
! 102: }
! 103:
! 104: /*
! 105: * Parse a device spec in one of two forms.
! 106: *
! 107: * dev(adapt, ctlr, unit, part)file
! 108: * [A-Za-z]*[0-9]*[A-Za-z]:file
! 109: * dev unit part
! 110: */
! 111: int
! 112: devparse(const char *fname, int *dev, int *adapt, int *ctlr, int *unit,
! 113: int *part, char **file)
! 114: {
! 115: int i;
! 116: char *s, *args[4];
! 117:
! 118: /* get device name and make lower case */
! 119: for (s = (char *)fname; *s && *s != '/' && *s != ':' && *s != '('; s++)
! 120: if (isupper(*s)) *s = tolower(*s);
! 121:
! 122: /* first form */
! 123: if (*s == '(') {
! 124: /* lookup device and get index */
! 125: if ((*dev = devlookup(fname, s - fname)) < 0)
! 126: goto baddev;
! 127:
! 128: /* tokenize device ident */
! 129: args[0] = ++s;
! 130: for (args[0] = s, i = 1; *s && *s != ')'; s++) {
! 131: if (*s == ',')
! 132: args[i++] = ++s;
! 133: }
! 134: switch(i) {
! 135: case 4:
! 136: *adapt = atoi(args[0]);
! 137: *ctlr = atoi(args[1]);
! 138: *unit = atoi(args[2]);
! 139: *part = atoi(args[3]);
! 140: break;
! 141: case 3:
! 142: *ctlr = atoi(args[0]);
! 143: *unit = atoi(args[1]);
! 144: *part = atoi(args[2]);
! 145: break;
! 146: case 2:
! 147: *unit = atoi(args[0]);
! 148: *part = atoi(args[1]);
! 149: break;
! 150: case 1:
! 151: *part = atoi(args[0]);
! 152: break;
! 153: case 0:
! 154: break;
! 155: }
! 156: *file = ++s;
! 157: }
! 158:
! 159: /* second form */
! 160: else if (*s == ':') {
! 161: int temp;
! 162:
! 163: /* isolate device */
! 164: for (s = (char *)fname; *s != ':' && !isdigit(*s); s++);
! 165:
! 166: /* lookup device and get index */
! 167: if ((*dev = devlookup(fname, s - fname)) < 0)
! 168: goto baddev;
! 169:
! 170: /* isolate unit */
! 171: if ((temp = atoi(s)) > 255)
! 172: goto bad;
! 173: *adapt = temp / 8;
! 174: *ctlr = temp % 8;
! 175: for (; isdigit(*s); s++);
! 176:
! 177: /* translate partition */
! 178: if (!ispart(*s))
! 179: goto bad;
! 180:
! 181: *part = *s++ - 'a';
! 182: if (*s != ':')
! 183: goto bad;
! 184: *file = ++s;
! 185: }
! 186:
! 187: /* no device present */
! 188: else
! 189: *file = (char *)fname;
! 190:
! 191: /* return the remaining unparsed part as the file to boot */
! 192: return(0);
! 193:
! 194: bad:
! 195: usage();
! 196:
! 197: baddev:
! 198: return(-1);
! 199: }
! 200:
! 201:
! 202: int
! 203: devopen(struct open_file *f, const char *fname, char **file)
! 204: {
! 205: int error;
! 206: int dev, adapt, ctlr, unit, part;
! 207: struct devsw *dp = &devsw[0];
! 208:
! 209: dev = B_TYPE(bootdev);
! 210: adapt = B_ADAPTOR(bootdev);
! 211: ctlr = B_CONTROLLER(bootdev);
! 212: unit = B_UNIT(bootdev);
! 213: part = B_PARTITION(bootdev);
! 214:
! 215: if ((error = devparse(fname, &dev, &adapt, &ctlr, &unit, &part, file)))
! 216: return(error);
! 217:
! 218: /*
! 219: * Set up filesystem type based on what device we're opening.
! 220: */
! 221: switch (dev) {
! 222: case 4: /* sd - only supports cd9660 */
! 223: bcopy(file_system_cd9660, file_system, sizeof(struct fs_ops));
! 224: break;
! 225:
! 226: case 0: /* ct - not supported */
! 227: case 2: /* hd - not supported */
! 228: case 6: /* le - not supported */
! 229: default:
! 230: /* XXX what else should we do here? */
! 231: printf("WARNING: BOGUS BOOT DEV TYPE 0x%x!\n", dev);
! 232: return (EIO);
! 233: }
! 234:
! 235: dp = &devsw[dev];
! 236:
! 237: if (!dp->dv_open)
! 238: return(ENODEV);
! 239:
! 240: f->f_dev = dp;
! 241:
! 242: if ((error = (*dp->dv_open)(f, adapt, ctlr, part)) == 0) {
! 243: if ((error =
! 244: (*punitsw[dev].p_punit)(adapt, ctlr, &unit)) != 0) {
! 245: goto bad;
! 246: }
! 247: opendev = MAKEBOOTDEV(dev, adapt, ctlr, unit, part);
! 248: return(0);
! 249: }
! 250:
! 251: bad:
! 252: printf("%s(%d,%d,%d,%d): %s\n", devsw[dev].dv_name,
! 253: adapt, ctlr, unit, part, strerror(error));
! 254:
! 255: return(error);
! 256: }
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