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>
28 __FBSDID("$FreeBSD$");
30 #include <sys/disklabel.h>
35 #include "bootstrap.h"
38 static int uboot_parsedev(struct uboot_devdesc **dev, const char *devspec,
42 * Point (dev) at an allocated device specifier for the device matching the
43 * path in (devspec). If it contains an explicit device specification,
44 * use that. If not, use the default device.
47 uboot_getdev(void **vdev, const char *devspec, const char **path)
49 struct uboot_devdesc **dev = (struct uboot_devdesc **)vdev;
53 * If it looks like this is just a path and no
54 * device, go with the current device.
56 if ((devspec == NULL) || (devspec[0] == '/') ||
57 (strchr(devspec, ':') == NULL)) {
59 if (((rv = uboot_parsedev(dev, getenv("currdev"), NULL)) == 0)
66 * Try to parse the device name off the beginning of the devspec.
68 return (uboot_parsedev(dev, devspec, path));
72 * Point (dev) at an allocated device specifier matching the string version
73 * at the beginning of (devspec). Return a pointer to the remaining
76 * In all cases, the beginning of (devspec) is compared to the names
77 * of known devices in the device switch, and then any following text
78 * is parsed according to the rules applied to the device type.
80 * For disk-type devices, the syntax is:
82 * disk<unit>[<partition>]:
86 uboot_parsedev(struct uboot_devdesc **dev, const char *devspec,
89 struct uboot_devdesc *idev;
93 int i, unit, pnum, ptype, err;
95 /* minimum length check */
96 if (strlen(devspec) < 2)
99 /* look for a device that matches */
100 for (i = 0, dv = NULL; devsw[i] != NULL; i++) {
101 if (!strncmp(devspec, devsw[i]->dv_name,
102 strlen(devsw[i]->dv_name))) {
109 idev = malloc(sizeof(struct uboot_devdesc));
111 np = (devspec + strlen(dv->dv_name));
113 switch(dv->dv_type) {
121 if (*np && (*np != ':')) {
122 /* next comes the unit number */
123 unit = strtol(np, &cp, 10);
128 if (*cp && (*cp != ':')) {
130 if (*cp == 'p' && *(cp + 1) &&
132 pnum = strtol(cp + 1, &cp, 10);
136 ptype = PTYPE_BSDLABEL;
138 (pnum >= MAXPARTITIONS)) {
146 if (*cp && (*cp != ':')) {
152 idev->d_disk.pnum = pnum;
153 idev->d_disk.ptype = ptype;
154 idev->d_disk.data = NULL;
156 *path = (*cp == 0) ? cp : cp + 1;
162 if (*np && (*np != ':')) {
163 /* get unit number if present */
164 unit = strtol(np, &cp, 0);
170 if (*cp && (*cp != ':')) {
177 *path = (*cp == 0) ? cp : cp + 1;
185 idev->d_type = dv->dv_type;
200 uboot_fmtdev(void *vdev)
202 struct uboot_devdesc *dev = (struct uboot_devdesc *)vdev;
204 static char buf[128];
206 switch(dev->d_type) {
208 strcpy(buf, "(no device)");
213 cp += sprintf(cp, "%s%d", dev->d_dev->dv_name, dev->d_unit);
214 if (dev->d_kind.disk.pnum >= 0) {
215 if (dev->d_kind.disk.ptype == PTYPE_BSDLABEL)
216 cp += sprintf(cp, "%c",
217 dev->d_kind.disk.pnum + 'a');
218 else if (dev->d_kind.disk.ptype == PTYPE_GPT)
219 cp += sprintf(cp, "p%i",
220 dev->d_kind.disk.pnum);
227 sprintf(buf, "%s%d:", dev->d_dev->dv_name, dev->d_unit);
234 * Set currdev to suit the value being supplied in (value).
237 uboot_setcurrdev(struct env_var *ev, int flags, const void *value)
239 struct uboot_devdesc *ncurr;
242 if ((rv = uboot_parsedev(&ncurr, value, NULL)) != 0)
245 env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL);