NetBSD/sys/arch/i386/isa/isavar.h

113 lines
3.9 KiB
C

/*
* Copyright (c) 1992 Berkeley Software Design, Inc.
* All rights reserved.
*
* 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 Berkeley Software
* Design, Inc.
* 4. The name of Berkeley Software Design must not be used to endorse
* or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN, INC. ``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 BERKELEY SOFTWARE DESIGN, INC. 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.
*
* from: BSDI Id: isavar.h,v 1.5 1992/12/01 18:06:00 karels Exp
* $Id: isavar.h,v 1.9 1994/04/07 06:50:58 mycroft Exp $
*/
/*
* ISA driver attach arguments
*/
struct isa_attach_args {
u_short ia_iobase; /* base i/o address */
u_short ia_iosize; /* span of ports used */
u_short ia_irq; /* interrupt request */
u_short ia_drq; /* DMA request */
caddr_t ia_maddr; /* physical i/o mem addr */
u_int ia_msize; /* size of i/o memory */
void *ia_aux; /* driver specific */
};
#define IOBASEUNK 0xffff /* i/o address is unknown */
#define DRQUNK 0xffff /* DMA request line is unknown */
#define MADDRUNK (caddr_t)-1 /* shared memory address is unknown */
/*
* per-device ISA variables
*/
struct isadev {
struct device *id_dev; /* back pointer to generic */
struct isadev *id_bchain; /* forward link in bus chain */
};
/*
* ISA masterbus
*/
struct isa_softc {
struct device sc_dev; /* base device */
struct isadev *sc_isadev; /* list of all children */
};
#define cf_iobase cf_loc[0]
#define cf_iosize cf_loc[1]
#define cf_maddr cf_loc[2]
#define cf_msize cf_loc[3]
#define cf_irq cf_loc[4]
#define cf_drq cf_loc[5]
/*
* Interrupt handler chains. Interrupt handlers should return 0 for
* `not I', 1 (`I took care of it'), or -1 (`I guess it was mine, but
* I wasn't expecting it'). intr_establish() inserts a handler into
* the list. The handler is called with its (single) argument.
*/
struct intrhand {
int (*ih_fun)();
void *ih_arg;
u_long ih_count;
struct intrhand *ih_next;
int ih_level;
};
void intr_establish __P((int intr, struct intrhand *));
void intr_disestablish __P((int intr, struct intrhand *));
void isa_establish __P((struct isadev *, struct device *));
/*
* software conventions
*/
typedef enum { BUS_ISA, BUS_EISA, BUS_MCA } isa_type;
extern int atdevbase; /* kernel virtual address of "hole" */
extern isa_type isa_bustype; /* type of bus */
/*
* Given a kernel virtual address for some location
* in the "hole" I/O space, return a physical address.
*/
#define ISA_PHYSADDR(v) ((caddr_t) ((u_long)(v) - atdevbase + IOM_BEGIN))
/*
* Given a physical address in the "hole",
* return a kernel virtual address.
*/
#define ISA_HOLE_VADDR(p) ((caddr_t) ((u_long)(p) - IOM_BEGIN + atdevbase))