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isavar.h revision 1.17 
      1 /*	$NetBSD: isavar.h,v 1.17 1995/12/24 02:31:38 mycroft Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1995 Chris G. Demetriou
      5  * Copyright (c) 1992 Berkeley Software Design, Inc.
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by Berkeley Software
     19  *	Design, Inc.
     20  * 4. The name of Berkeley Software Design must not be used to endorse
     21  *    or promote products derived from this software without specific
     22  *    prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN, INC. ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL BERKELEY SOFTWARE DESIGN, INC. BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  *
     36  *	BSDI Id: isavar.h,v 1.5 1992/12/01 18:06:00 karels Exp
     37  */
     38 
     39 /*
     40  * Definitions for ISA autoconfiguration.
     41  */
     42 
     43 #include <sys/queue.h>
     44 
     45 /*
     46  * ISA driver attach arguments
     47  */
     48 struct isa_attach_args {
     49 	int	ia_iobase;		/* base i/o address */
     50 	int	ia_iosize;		/* span of ports used */
     51 	int	ia_irq;			/* interrupt request */
     52 	int	ia_drq;			/* DMA request */
     53 	int	ia_maddr;		/* physical i/o mem addr */
     54 	u_int	ia_msize;		/* size of i/o memory */
     55 	void	*ia_aux;		/* driver specific */
     56 };
     57 
     58 #define	IOBASEUNK	-1		/* i/o address is unknown */
     59 #define	IRQUNK		-1		/* interrupt request line is unknown */
     60 #define	DRQUNK		-1		/* DMA request line is unknown */
     61 #define	MADDRUNK	-1		/* shared memory address is unknown */
     62 
     63 /*
     64  * Per-device ISA variables
     65  */
     66 struct isadev {
     67 	struct  device *id_dev;		/* back pointer to generic */
     68 	TAILQ_ENTRY(isadev)
     69 		id_bchain;		/* bus chain */
     70 };
     71 
     72 /*
     73  * ISA master bus
     74  */
     75 struct isa_softc {
     76 	struct	device sc_dev;		/* base device */
     77 	TAILQ_HEAD(, isadev)
     78 		sc_subdevs;		/* list of all children */
     79 };
     80 
     81 #define		cf_iobase		cf_loc[0]
     82 #define		cf_iosize		cf_loc[1]
     83 #define		cf_maddr		cf_loc[2]
     84 #define		cf_msize		cf_loc[3]
     85 #define		cf_irq			cf_loc[4]
     86 #define		cf_drq			cf_loc[5]
     87 
     88 /*
     89  * ISA interrupt handler manipulation.
     90  *
     91  * To establish an ISA interrupt handler, a driver calls isa_intr_establish()
     92  * with the interrupt number, type, level, function, and function argument of
     93  * the interrupt it wants to handle.  Isa_intr_establish() returns an opaque
     94  * handle to an event descriptor if it succeeds, and invokes panic() if it
     95  * fails.  (XXX It should return NULL, then drivers should handle that, but
     96  * what should they do?)  Interrupt handlers should return 0 for "interrupt
     97  * not for me", 1  for "I took care of it", or -1 for "I guess it was mine,
     98  * but I wasn't expecting it."
     99  *
    100  * To remove an interrupt handler, the driver calls isa_intr_disestablish()
    101  * with the handle returned by isa_intr_establish() for that handler.
    102  */
    103 
    104 /* ISA interrupt sharing types */
    105 void	isascan __P((struct device *parent, void *match));
    106 void	*isa_intr_establish __P((int intr, int type, int level,
    107 	    int (*ih_fun)(void *), void *ih_arg));
    108 void	isa_intr_disestablish __P((void *handler));
    109 char	*isa_intr_typename __P((int type));
    110 
    111 #ifdef NEWCONFIG
    112 /*
    113  * Establish a device as being on the ISA bus (XXX NOT IMPLEMENTED).
    114  */
    115 void isa_establish __P((struct isadev *, struct device *));
    116 #endif
    117 
    118 /*
    119  * software conventions
    120  */
    121 typedef enum { BUS_ISA, BUS_EISA } isa_type;
    122 
    123 extern isa_type isa_bustype;	/* type of bus; XXX should be in softc */
    124