94 lines
2.8 KiB
Objective-C
94 lines
2.8 KiB
Objective-C
#
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# Copyright (c) 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_if.m,v 1.2 1998/07/12 16:20:51 dfr Exp $
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#
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INTERFACE bus
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#
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# This is called from system code which prints out a description of a
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# device. It should describe the attachment that the child has with
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# the parent. For instance the TurboLaser bus prints which node the
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# device is attached to.
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#
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METHOD void print_child {
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device_t dev;
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device_t child;
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};
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#
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# These two methods manage a bus specific set of instance variables of
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# a child device. The intention is that each different type of bus
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# defines a set of appropriate instance variables (such as ports and
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# irqs for ISA bus etc.)
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#
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# This information could be given to the child device as a struct but
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# that makes it hard for a bus to add or remove variables without
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# forcing an edit and recompile for all drivers which may not be
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# possible for vendor supplied binary drivers.
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#
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# Read an instance variable. Return 0 on success.
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#
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METHOD int read_ivar {
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device_t dev;
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device_t child;
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int index;
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u_long *result;
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};
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#
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# Write an instance variable. Return 0 on success.
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#
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METHOD int write_ivar {
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device_t dev;
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device_t child;
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int index;
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u_long value;
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};
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#
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# Create an interrupt handler for the child device. The handler will
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# be called with the value 'arg' as its only argument. This method
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# does not activate the handler.
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#
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METHOD void* create_intr {
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device_t dev;
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device_t child;
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int irq;
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driver_intr_t *intr;
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void *arg;
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};
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#
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# Activate an interrupt handler previously created with
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# BUS_CREATE_INTR.
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#
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METHOD int connect_intr {
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device_t dev;
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void *ih;
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};
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