6182fdbda8
i386 platform boots, it is no longer ISA-centric, and is fully dynamic. Most old drivers compile and run without modification via 'compatability shims' to enable a smoother transition. eisa, isapnp and pccard* are not yet using the new resource manager. Once fully converted, all drivers will be loadable, including PCI and ISA. (Some other changes appear to have snuck in, including a port of Soren's ATA driver to the Alpha. Soren, back this out if you need to.) This is a checkpoint of work-in-progress, but is quite functional. The bulk of the work was done over the last few years by Doug Rabson and Garrett Wollman. Approved by: core
306 lines
11 KiB
C
306 lines
11 KiB
C
/*-
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* Copyright (c) 1997,1998 Doug Rabson
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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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* $Id: bus.h,v 1.10 1999/03/29 08:54:19 dfr Exp $
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*/
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#ifndef _SYS_BUS_H_
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#define _SYS_BUS_H_
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#ifdef KERNEL
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#include <sys/queue.h>
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/*
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* Forward declarations
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*/
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typedef struct device *device_t;
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typedef struct driver driver_t;
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typedef struct device_method device_method_t;
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typedef struct devclass *devclass_t;
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typedef struct device_ops *device_ops_t;
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typedef struct device_op_desc *device_op_desc_t;
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typedef void driver_intr_t(void*);
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/*
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* We define this in terms of bits because some devices may belong
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* to multiple classes (and therefore need to be included in
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* multiple interrupt masks, which is what this really serves to
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* indicate. Buses which do interrupt remapping will want to
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* change their type to reflect what sort of devices are underneath.
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*/
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typedef enum driver_type {
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DRIVER_TYPE_TTY = 1,
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DRIVER_TYPE_BIO = 2,
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DRIVER_TYPE_NET = 4,
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DRIVER_TYPE_CAM = 8,
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DRIVER_TYPE_MISC = 16,
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DRIVER_TYPE_FAST = 128
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} driver_type_t;
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typedef int (*devop_t)(void);
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struct device_method {
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device_op_desc_t desc;
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devop_t func;
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};
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struct driver {
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const char *name; /* driver name */
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device_method_t *methods; /* method table */
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driver_type_t type;
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size_t softc; /* size of device softc struct */
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void *priv; /* driver private data */
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device_ops_t ops; /* compiled method table */
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int refs; /* # devclasses containing driver */
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};
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typedef enum device_state {
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DS_NOTPRESENT, /* not probed or probe failed */
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DS_ALIVE, /* probe succeeded */
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DS_ATTACHED, /* attach method called */
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DS_BUSY /* device is open */
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} device_state_t;
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/*
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* The root bus, to which all top-level busses are attached.
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*/
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extern device_t root_bus;
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extern devclass_t root_devclass;
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void root_bus_configure(void);
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/*
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* Useful functions for implementing busses.
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*/
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struct resource;
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int bus_generic_activate_resource(device_t dev, device_t child, int type,
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int rid, struct resource *r);
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struct resource *bus_generic_alloc_resource(device_t bus, device_t child,
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int type, int *rid,
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u_long start, u_long end,
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u_long count, u_int flags);
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int bus_generic_attach(device_t dev);
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int bus_generic_deactivate_resource(device_t dev, device_t child, int type,
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int rid, struct resource *r);
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int bus_generic_detach(device_t dev);
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void bus_generic_driver_added(device_t dev, driver_t *driver);
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void bus_generic_print_child(device_t dev, device_t child);
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int bus_generic_read_ivar(device_t dev, device_t child, int which,
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uintptr_t *result);
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int bus_generic_release_resource(device_t bus, device_t child,
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int type, int rid, struct resource *r);
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int bus_generic_resume(device_t dev);
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int bus_generic_setup_intr(device_t dev, device_t child,
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struct resource *irq,
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driver_intr_t *intr, void *arg, void **cookiep);
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int bus_generic_shutdown(device_t dev);
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int bus_generic_suspend(device_t dev);
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int bus_generic_teardown_intr(device_t dev, device_t child,
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struct resource *irq, void *cookie);
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int bus_generic_write_ivar(device_t dev, device_t child, int which,
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uintptr_t value);
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/*
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* Wrapper functions for the BUS_*_RESOURCE methods to make client code
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* a little simpler.
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*/
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struct resource *bus_alloc_resource(device_t dev, int type, int *rid,
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u_long start, u_long end, u_long count,
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u_int flags);
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int bus_activate_resource(device_t dev, int type, int rid,
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struct resource *r);
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int bus_deactivate_resource(device_t dev, int type, int rid,
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struct resource *r);
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int bus_release_resource(device_t dev, int type, int rid,
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struct resource *r);
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int bus_setup_intr(device_t dev, struct resource *r,
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driver_intr_t handler, void *arg, void **cookiep);
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int bus_teardown_intr(device_t dev, struct resource *r, void *cookie);
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/*
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* Access functions for device.
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*/
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device_t device_add_child(device_t dev, const char *name, int unit,
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void *ivp);
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device_t device_add_child_after(device_t dev, device_t place,
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const char *name, int unit, void *ivp);
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void device_busy(device_t dev);
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int device_delete_child(device_t dev, device_t child);
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int device_detach(device_t dev);
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void device_disable(device_t dev);
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void device_enable(device_t dev);
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device_t device_find_child(device_t dev, const char *classname,
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int unit);
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const char *device_get_desc(device_t dev);
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devclass_t device_get_devclass(device_t dev);
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driver_t *device_get_driver(device_t dev);
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device_t device_get_parent(device_t dev);
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int device_get_children(device_t dev, device_t **listp, int *countp);
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void *device_get_ivars(device_t dev);
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const char *device_get_name(device_t dev);
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const char *device_get_nameunit(device_t dev);
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void *device_get_softc(device_t dev);
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device_state_t device_get_state(device_t dev);
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int device_get_unit(device_t dev);
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int device_is_alive(device_t dev); /* did probe succeed? */
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int device_is_enabled(device_t dev);
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int device_is_quiet(device_t dev);
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void device_print_prettyname(device_t dev);
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void device_printf(device_t dev, const char *, ...) __printflike(2, 3);
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int device_probe_and_attach(device_t dev);
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void device_quiet(device_t dev);
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void device_set_desc(device_t dev, const char* desc);
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void device_set_desc_copy(device_t dev, const char* desc);
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int device_set_devclass(device_t dev, const char *classname);
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int device_set_driver(device_t dev, driver_t *driver);
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int device_shutdown(device_t dev);
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void device_unbusy(device_t dev);
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void device_verbose(device_t dev);
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/*
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* Access functions for devclass.
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*/
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int devclass_add_driver(devclass_t dc, driver_t *driver);
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int devclass_delete_driver(devclass_t dc, driver_t *driver);
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devclass_t devclass_find(const char *classname);
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driver_t *devclass_find_driver(devclass_t dc, const char *classname);
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const char *devclass_get_name(devclass_t dc);
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device_t devclass_get_device(devclass_t dc, int unit);
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void *devclass_get_softc(devclass_t dc, int unit);
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int devclass_get_devices(devclass_t dc, device_t **listp, int *countp);
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int devclass_get_maxunit(devclass_t dc);
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/*
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* Access functions for device resources.
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*/
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int resource_int_value(const char *name, int unit, char *resname,
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int *result);
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int resource_long_value(const char *name, int unit, char *resname,
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long *result);
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int resource_string_value(const char *name, int unit, char *resname,
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char **result);
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int resource_query_string(int i, char *resname, char *value);
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char *resource_query_name(int i);
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int resource_query_unit(int i);
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int resource_locate(int i, char *resname);
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int resource_set_int(int i, char *resname, int value);
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int resource_set_long(int i, char *resname, long value);
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int resource_set_string(int i, char *resname, char *value);
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int resource_count(void);
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/*
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* Shorthand for constructing method tables.
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*/
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#define DEVMETHOD(NAME, FUNC) { &NAME##_desc, (devop_t) FUNC }
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/*
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* Some common device interfaces.
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*/
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#include "device_if.h"
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#include "bus_if.h"
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struct module;
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int driver_module_handler(struct module *, int, void *);
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/*
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* Module support for automatically adding drivers to busses.
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*/
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struct driver_module_data {
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int (*dmd_chainevh)(struct module *, int, void *);
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void *dmd_chainarg;
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const char *dmd_busname;
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driver_t **dmd_drivers;
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int dmd_ndrivers;
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devclass_t *dmd_devclass;
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};
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#define DRIVER_MODULE(name, busname, driver, devclass, evh, arg) \
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\
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static driver_t *name##_##busname##_driver_list[] = { &driver }; \
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static struct driver_module_data name##_##busname##_driver_mod = { \
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evh, arg, \
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#busname, \
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name##_##busname##_driver_list, \
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(sizeof name##_##busname##_driver_list) / \
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(sizeof name##_##busname##_driver_list[0]), \
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&devclass \
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}; \
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\
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static moduledata_t name##_##busname##_mod = { \
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#busname "/" #name, \
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driver_module_handler, \
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&name##_##busname##_driver_mod \
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}; \
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DECLARE_MODULE(name##_##busname, name##_##busname##_mod, \
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SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
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#define MULTI_DRIVER_MODULE(name, busname, drivers, devclass, evh, arg) \
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\
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static driver_t name##_##busname##_driver_list[] = drivers; \
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static struct driver_module_data name##_##busname##_driver_mod = { \
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evh, arg, \
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#busname, \
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name##_##busname##_driver_list, \
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(sizeof name##_##busname##_driver_list) / \
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(sizeof name##_##busname##_driver_list[0]), \
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&devclass \
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}; \
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\
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static moduledata_t name##_##busname##_mod = { \
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#busname "/" #name, \
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driver_module_handler, \
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&name##_##busname##_driver_mod \
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}; \
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DECLARE_MODULE(name##_##busname, name##_##busname##_mod, \
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SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
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#define CDEV_DRIVER_MODULE(name, busname, driver, devclass, \
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major, devsw, evh, arg) \
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\
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static struct cdevsw_module_data name##_##busname##_cdevsw_mod = { \
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evh, arg, makedev(major, 0), &devsw \
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}; \
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\
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DRIVER_MODULE(name, busname, driver, devclass, \
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cdevsw_module_handler, &name##_##busname##_cdevsw_mod)
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#define BDEV_DRIVER_MODULE(name, busname, driver, devclass, \
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bmajor, cmajor, devsw, evh, arg) \
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\
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static struct bdevsw_module_data name##_##busname##_bdevsw_mod = { \
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evh, arg, makedev(bmajor, 0), makedev(cmajor, 0), &devsw \
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}; \
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\
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DRIVER_MODULE(name, busname, driver, devclass, \
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bdevsw_module_handler, &name##_##busname##_bdevsw_mod)
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#endif /* KERNEL */
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#endif /* !_SYS_BUS_H_ */
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