d38d8a4c4e
dev can't be NULL here. ofw_common_parsedev is always called via devparse (indirectly through dv_parsedev() calls there which call it with the args unchanged). In the past, ofw_getdev could call us with NULL pointer for the parse-only case, but that's now all handled inside of devparse for simplicity. Sponsored by: Netflix Reviewed by: kevans Differential Revision: https://reviews.freebsd.org/D38041
116 lines
3.4 KiB
C
116 lines
3.4 KiB
C
/*-
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* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <stand.h>
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#include "bootstrap.h"
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#include "libofw.h"
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/*
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* Point (dev) at an allocated device specifier for the device matching the
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* path in (devspec). If it contains an explicit device specification,
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* use that. If not, use the default device.
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*/
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int
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ofw_getdev(void **vdev, const char *devspec, const char **path)
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{
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struct devdesc **dev = (struct devdesc **)vdev;
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int rv;
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/*
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* If it looks like this is just a path and no device, go with the
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* current device.
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*/
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if (devspec == NULL || strpbrk(devspec, ":@") == NULL) {
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rv = devparse(dev, getenv("currdev"), NULL);
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if (rv == 0 && path != NULL)
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*path = devspec;
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return (rv);
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}
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/*
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* Try to parse the device name off the beginning of the devspec
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*/
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return (devparse(dev, devspec, path));
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}
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/*
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* Search the OFW (path) for a node that's of (want_type).
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*/
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phandle_t
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ofw_path_to_handle(const char *ofwpath, const char *want_type, const char **path)
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{
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const char *p, *s;
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char name[256];
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char type[64];
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phandle_t handle;
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int len;
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for (p = s = ofwpath; *s != '\0'; p = s) {
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if ((s = strchr(p + 1, '/')) == NULL)
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s = strchr(p, '\0');
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len = s - ofwpath;
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if (len >= sizeof(name))
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return ((phandle_t)-1);
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bcopy(ofwpath, name, len);
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name[len] = '\0';
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if ((handle = OF_finddevice(name)) == -1)
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continue;
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if (OF_getprop(handle, "device_type", type, sizeof(type)) == -1)
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continue;
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if (strcmp(want_type, type) == 0) {
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*path = s;
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return (handle);
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}
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}
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return ((phandle_t)-1);
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}
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int
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ofw_common_parsedev(struct devdesc **dev, const char *devspec, const char **path,
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const char *ofwtype)
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{
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const char *rem_path;
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struct ofw_devdesc *idev;
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if (ofw_path_to_handle(devspec, ofwtype, &rem_path) == -1)
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return (ENOENT);
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idev = malloc(sizeof(struct ofw_devdesc));
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if (idev == NULL) {
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printf("ofw_parsedev: malloc failed\n");
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return ENOMEM;
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};
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strlcpy(idev->d_path, devspec, min(rem_path - devspec + 1,
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sizeof(idev->d_path)));
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*dev = &idev->dd;
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if (path != NULL)
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*path = rem_path;
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return 0;
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}
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