2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
31 #include "bootstrap.h"
35 static int uboot_parsedev(struct uboot_devdesc **dev, const char *devspec,
39 * Point (dev) at an allocated device specifier for the device matching the
40 * path in (devspec). If it contains an explicit device specification,
41 * use that. If not, use the default device.
44 uboot_getdev(void **vdev, const char *devspec, const char **path)
46 struct uboot_devdesc **dev = (struct uboot_devdesc **)vdev;
50 * If it looks like this is just a path and no
51 * device, go with the current device.
53 if ((devspec == NULL) || (devspec[0] == '/') ||
54 (strchr(devspec, ':') == NULL)) {
56 if (((rv = uboot_parsedev(dev, getenv("currdev"), NULL)) == 0)
63 * Try to parse the device name off the beginning of the devspec.
65 return (uboot_parsedev(dev, devspec, path));
69 * Point (dev) at an allocated device specifier matching the string version
70 * at the beginning of (devspec). Return a pointer to the remaining
73 * In all cases, the beginning of (devspec) is compared to the names
74 * of known devices in the device switch, and then any following text
75 * is parsed according to the rules applied to the device type.
77 * For disk-type devices, the syntax is:
79 * disk<unit>[<partition>]:
83 uboot_parsedev(struct uboot_devdesc **dev, const char *devspec,
86 struct uboot_devdesc *idev;
92 /* minimum length check */
93 if (strlen(devspec) < 2)
96 /* look for a device that matches */
97 for (i = 0, dv = NULL; devsw[i] != NULL; i++) {
98 if (!strncmp(devspec, devsw[i]->dv_name,
99 strlen(devsw[i]->dv_name))) {
106 idev = malloc(sizeof(struct uboot_devdesc));
108 np = (devspec + strlen(dv->dv_name));
110 switch(dv->dv_type) {
114 #ifdef LOADER_DISK_SUPPORT
117 err = disk_parsedev((struct devdesc **)&idev, devspec, path);
126 if (*np && (*np != ':')) {
127 /* get unit number if present */
128 unit = strtol(np, &cp, 0);
134 if (*cp && (*cp != ':')) {
138 idev->dd.d_unit = unit;
141 *path = (*cp == 0) ? cp : cp + 1;
150 * dev can be NULL, since uboot_getdev calls us directly, rather than via
151 * dv_parsedev in devparse() which otherwise ensures that it can't be NULL.
167 * Set currdev to suit the value being supplied in (value).
170 uboot_setcurrdev(struct env_var *ev, int flags, const void *value)
172 struct uboot_devdesc *ncurr;
175 if ((rv = uboot_parsedev(&ncurr, value, NULL)) != 0)
179 return (mount_currdev(ev, flags, value));