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device.h
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device.h
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/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Lawrence Berkeley Laboratory.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)device.h 8.2 (Berkeley) 2/17/94
* $Id: device.h,v 1.8 1998/07/04 19:00:47 steve Exp $
*/
#ifndef _SYS_DEVICE_H_
#define _SYS_DEVICE_H_
#include <sys/queue.h>
/*
* Minimal device structures.
* Note that all ``system'' device types are listed here.
*/
enum devclass {
DV_DULL, /* generic, no special info */
DV_CPU, /* CPU (carries resource utilization) */
DV_DISK, /* disk drive (label, etc) */
DV_IFNET, /* network interface */
DV_TAPE, /* tape device */
DV_TTY /* serial line interface (?) */
};
struct device {
enum devclass dv_class; /* this device's classification */
struct device *dv_next; /* next in list of all */
struct cfdata *dv_cfdata; /* config data that found us */
int dv_unit; /* device unit number */
char dv_xname[16]; /* external name (name + unit) */
struct device *dv_parent; /* pointer to parent device */
};
/* `event' counters (use zero or more per device instance, as needed) */
struct evcnt {
struct evcnt *ev_next; /* linked list */
struct device *ev_dev; /* associated device */
int ev_count; /* how many have occurred */
char ev_name[8]; /* what to call them (systat display) */
};
/*
* Configuration data (i.e., data placed in ioconf.c).
*/
struct cfdata {
struct cfdriver *cf_driver; /* config driver */
short cf_unit; /* unit number */
short cf_fstate; /* finding state (below) */
int *cf_loc; /* locators (machine dependent) */
int cf_flags; /* flags from config */
short *cf_parents; /* potential parents */
void (**cf_ivstubs) __P((void));
/* config-generated vectors, if any */
};
#define FSTATE_NOTFOUND 0 /* has not been found */
#define FSTATE_FOUND 1 /* has been found */
#define FSTATE_STAR 2 /* duplicable */
typedef int (*cfmatch_t) __P((struct device *, struct cfdata *, void *));
/*
* `configuration' driver (what the machine-independent autoconf uses).
* As devices are found, they are applied against all the potential matches.
* The one with the best match is taken, and a device structure (plus any
* other data desired) is allocated. Pointers to these are placed into
* an array of pointers. The array itself must be dynamic since devices
* can be found long after the machine is up and running.
*/
struct cfdriver {
void **cd_devs; /* devices found */
char *cd_name; /* device name */
cfmatch_t cd_match; /* returns a match level */
void (*cd_attach) __P((struct device *, struct device *, void *));
enum devclass cd_class; /* device classification */
size_t cd_devsize; /* size of dev data (for malloc) */
void *cd_aux; /* additional driver, if any */
int cd_ndevs; /* size of cd_devs array */
};
struct intr_config_hook {
TAILQ_ENTRY(intr_config_hook) ich_links;
void (*ich_func) __P((void *arg));
void *ich_arg;
};
/*
* Configuration printing functions, and their return codes. The second
* argument is NULL if the device was configured; otherwise it is the name
* of the parent device. The return value is ignored if the device was
* configured, so most functions can return UNCONF unconditionally.
*/
typedef int (*cfprint_t) __P((void *, char *));
#define QUIET 0 /* print nothing */
#define UNCONF 1 /* print " not configured\n" */
#define UNSUPP 2 /* print " not supported\n" */
/*
* Pseudo-device attach information (function + number of pseudo-devs).
*/
struct pdevinit {
void (*pdev_attach) __P((int));
int pdev_count;
};
extern struct device *alldevs; /* head of list of all devices */
extern struct evcnt *allevents; /* head of list of all events */
struct cfdata *config_search __P((cfmatch_t, struct device *, void *));
struct cfdata *config_rootsearch __P((cfmatch_t, char *, void *));
int config_found __P((struct device *, void *, cfprint_t));
int config_rootfound __P((char *, void *));
void config_attach __P((struct device *, struct cfdata *, void *, cfprint_t));
void evcnt_attach __P((struct device *, const char *, struct evcnt *));
int config_intrhook_establish __P((struct intr_config_hook *hook));
void config_intrhook_disestablish __P((struct intr_config_hook *hook));
#endif /* !_SYS_DEVICE_H_ */