124 lines
4.3 KiB
C
124 lines
4.3 KiB
C
/* $NetBSD: isavar.h,v 1.17 1995/12/24 02:31:38 mycroft Exp $ */
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/*
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* Copyright (c) 1995 Chris G. Demetriou
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* Copyright (c) 1992 Berkeley Software Design, Inc.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Berkeley Software
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* Design, Inc.
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* 4. The name of Berkeley Software Design must not be used to endorse
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* or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN, INC. ``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 BERKELEY SOFTWARE DESIGN, INC. 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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* BSDI Id: isavar.h,v 1.5 1992/12/01 18:06:00 karels Exp
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*/
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/*
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* Definitions for ISA autoconfiguration.
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*/
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#include <sys/queue.h>
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/*
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* ISA driver attach arguments
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*/
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struct isa_attach_args {
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int ia_iobase; /* base i/o address */
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int ia_iosize; /* span of ports used */
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int ia_irq; /* interrupt request */
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int ia_drq; /* DMA request */
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int ia_maddr; /* physical i/o mem addr */
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u_int ia_msize; /* size of i/o memory */
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void *ia_aux; /* driver specific */
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};
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#define IOBASEUNK -1 /* i/o address is unknown */
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#define IRQUNK -1 /* interrupt request line is unknown */
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#define DRQUNK -1 /* DMA request line is unknown */
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#define MADDRUNK -1 /* shared memory address is unknown */
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/*
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* Per-device ISA variables
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*/
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struct isadev {
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struct device *id_dev; /* back pointer to generic */
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TAILQ_ENTRY(isadev)
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id_bchain; /* bus chain */
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};
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/*
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* ISA master bus
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*/
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struct isa_softc {
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struct device sc_dev; /* base device */
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TAILQ_HEAD(, isadev)
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sc_subdevs; /* list of all children */
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};
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#define cf_iobase cf_loc[0]
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#define cf_iosize cf_loc[1]
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#define cf_maddr cf_loc[2]
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#define cf_msize cf_loc[3]
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#define cf_irq cf_loc[4]
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#define cf_drq cf_loc[5]
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/*
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* ISA interrupt handler manipulation.
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*
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* To establish an ISA interrupt handler, a driver calls isa_intr_establish()
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* with the interrupt number, type, level, function, and function argument of
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* the interrupt it wants to handle. Isa_intr_establish() returns an opaque
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* handle to an event descriptor if it succeeds, and invokes panic() if it
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* fails. (XXX It should return NULL, then drivers should handle that, but
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* what should they do?) Interrupt handlers should return 0 for "interrupt
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* not for me", 1 for "I took care of it", or -1 for "I guess it was mine,
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* but I wasn't expecting it."
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*
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* To remove an interrupt handler, the driver calls isa_intr_disestablish()
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* with the handle returned by isa_intr_establish() for that handler.
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*/
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/* ISA interrupt sharing types */
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void isascan __P((struct device *parent, void *match));
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void *isa_intr_establish __P((int intr, int type, int level,
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int (*ih_fun)(void *), void *ih_arg));
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void isa_intr_disestablish __P((void *handler));
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char *isa_intr_typename __P((int type));
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#ifdef NEWCONFIG
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/*
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* Establish a device as being on the ISA bus (XXX NOT IMPLEMENTED).
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*/
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void isa_establish __P((struct isadev *, struct device *));
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#endif
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/*
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* software conventions
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*/
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typedef enum { BUS_ISA, BUS_EISA } isa_type;
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extern isa_type isa_bustype; /* type of bus; XXX should be in softc */
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