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

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/*-
* Copyright (c) 1992 Berkeley Software Design, Inc. All rights reserved.
* The Berkeley Software Design Inc. software License Agreement specifies
* the terms and conditions for redistribution.
*
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* BSDI $Id: isavar.h,v 1.5 1993/10/26 12:16:35 mycroft Exp $
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*/
/*
* 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 */
};
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#define IOBASEUNK 0xffff /* i/o address is unknown */
#define DRQUNK 0xffff /* DMA request line is unknown */
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#define MADDRUNK (caddr_t)-1 /* shared memory address is unknown */
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/*
* 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;
} *intrhand[16];
void intr_establish __P((int intr, struct intrhand *, enum devclass));
void isa_establish __P((struct isadev *, struct device *));
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/*
* software conventions
*/
typedef enum { BUS_ISA, BUS_EISA, BUS_MCA } isa_type;
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extern int atdevbase; /* kernel virtual address of "hole" */
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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))