NetBSD/sys/arch/acorn26/include/bus.h

148 lines
5.8 KiB
C

/* $NetBSD: bus.h,v 1.2 2002/03/24 23:37:43 bjh21 Exp $ */
/*-
* Copyright (c) 2000 Ben Harris
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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.
*/
/*
* bus.h - Bus space functions for brivers
*/
#ifndef _ACORN26_BUS_H_
#define _ACORN26_BUS_H_
#include <arm/blockio.h>
/*
* I believe that there's only one sensible bus space on the Archimedes,
* which corresponds to the system I/O bus.
*
* Some IDE cards have an odd shift applied to their registers. This is
* contained in the bus_space_tag_t.
*/
/* Addresses (in bus space). */
typedef u_int bus_addr_t;
typedef u_int bus_size_t;
/* Access methods for bus space. */
typedef int bus_space_tag_t;
typedef struct bus_space_handle {
bus_addr_t a1; /* Address for 8-bit operations */
bus_addr_t a2; /* Address for 16-bit operations */
} bus_space_handle_t;
/* Mapping and unmapping operations. */
#define BUS_SPACE_MAP_CACHEABLE 0x01
#define BUS_SPACE_MAP_LINEAR 0x02
extern int bus_space_map(bus_space_tag_t, bus_addr_t, bus_size_t, int,
bus_space_handle_t *);
#define bus_space_unmap(t,h,s) /* Do nothing */
extern int bus_space_subregion(bus_space_tag_t, bus_space_handle_t, bus_size_t,
bus_size_t, bus_space_handle_t *);
extern int bus_space_shift(bus_space_tag_t, bus_space_handle_t, int,
bus_space_tag_t *, bus_space_handle_t *);
/* Allocating and freeing bus space */
#define bus_space_alloc(t, rs, re, s, a, b, c, ap, hp) (-1)
#define bus_space_free(t, h, s) /* Do nothing */
/* Mapping bus space into user address space (impossible on acorn26) */
#define bus_space_mmap(t, a, o, p, f) (-1)
/* Used by ne2000.c */
#define BUS_SPACE_ALIGNED_POINTER ALIGNED_POINTER
/* Bus barrier operations. */
#define BUS_SPACE_BARRIER_READ 0
#define BUS_SPACE_BARRIER_WRITE 0
#define bus_space_barrier(t, h, o, l, f) /* Do nothing */
/* Bus read (single) operations. */
#define bus_space_read_1(t, h, o) \
(*(volatile u_int8_t *)((h.a1) + ((o) << (t))))
#define bus_space_read_2(t, h, o) \
(*(volatile u_int16_t *)((h.a2) + ((o) << (t))))
/* Bus write (single) operations. */
#define bus_space_write_1(t, h, o, v) \
(*(volatile u_int8_t *)((h.a1) + ((o) << (t))) = (v))
#define bus_space_write_2(t, h, o, v) \
(*(volatile u_int32_t *)((h.a2) + ((o) << (t))) = (v) | ((v) << 16))
/* Bus read multiple operations. */
#define bus_space_read_multi_1(t, h, o, d, c) \
(read_multi_1((h.a1) + ((o) << (t)), (d), (c)))
extern void bus_space_read_multi_2(bus_space_tag_t, bus_space_handle_t,
bus_size_t, u_int16_t *, bus_size_t);
#define bus_space_read_multi_4(t, h, o, d, s) panic("bus_space_read_multi_4")
/* Bus write multiple operations. */
#define bus_space_write_multi_1(t, h, o, d, c) \
(write_multi_1((h.a1) + ((o) << (t)), (d), (c)))
extern void bus_space_write_multi_2(bus_space_tag_t, bus_space_handle_t,
bus_size_t, u_int16_t const *, bus_size_t);
#define bus_space_write_multi_4(t, h, o, d, s) panic("bus_space_write_multi_4")
/* Bus set multiple operations. */
extern void bus_space_set_multi_1(bus_space_tag_t, bus_space_handle_t,
bus_size_t, u_int8_t, bus_size_t);
extern void bus_space_set_multi_2(bus_space_tag_t, bus_space_handle_t,
bus_size_t, u_int16_t, bus_size_t);
/* Bus read region operations. */
extern void bus_space_read_region_1(bus_space_tag_t, bus_space_handle_t,
bus_size_t, u_int8_t *, bus_size_t);
extern void bus_space_read_region_2(bus_space_tag_t, bus_space_handle_t,
bus_size_t, u_int16_t *, bus_size_t);
/* Bus write region operations. */
extern void bus_space_write_region_1(bus_space_tag_t, bus_space_handle_t,
bus_size_t, u_int8_t const *, bus_size_t);
extern void bus_space_write_region_2(bus_space_tag_t, bus_space_handle_t,
bus_size_t, u_int16_t const *,
bus_size_t);
/* Bus set region operations. */
extern void bus_space_set_region_1(bus_space_tag_t, bus_space_handle_t,
bus_size_t, u_int8_t, bus_size_t);
extern void bus_space_set_region_2(bus_space_tag_t, bus_space_handle_t,
bus_size_t, u_int16_t, bus_size_t);
/* Copy operations. */
extern void bus_space_copy_region_1(bus_space_tag_t, bus_space_handle_t,
bus_size_t, bus_space_handle_t, bus_size_t, bus_size_t);
extern void bus_space_copy_region_2(bus_space_tag_t, bus_space_handle_t,
bus_size_t, bus_space_handle_t, bus_size_t, bus_size_t);
/*
* bus_dma stuff. We don't support bus_dma yet, but some drivers need
* this.
*/
typedef void *bus_dmamap_t;
#endif /* _ACORN26_BUS_H_ */