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173 lines
7.2 KiB
C
173 lines
7.2 KiB
C
/* $NetBSD: bus_funcs.h,v 1.2 2014/07/29 21:21:44 skrll Exp $ */
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/*
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* Copyright (c) 1996, 1997, 1998, 2001 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _COBALT_BUS_FUNCS_H_
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#define _COBALT_BUS_FUNCS_H_
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/*
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* uintN_t bus_space_read_N(bus_space_tag_t tag,
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* bus_space_handle_t bsh, bus_size_t offset);
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*
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* Read a 1, 2, 4, or 8 byte quantity from bus space
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* described by tag/handle/offset.
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*/
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#define bus_space_read_1(t, h, o) \
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((void) t, (*(volatile uint8_t *)((h) + (o))))
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#define bus_space_read_2(t, h, o) \
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((void) t, (*(volatile uint16_t *)((h) + (o))))
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#define bus_space_read_4(t, h, o) \
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((void) t, (*(volatile uint32_t *)((h) + (o))))
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#if 0 /* Cause a link error for bus_space_read_8 */
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#define bus_space_read_8(t, h, o) !!! bus_space_read_8 unimplemented !!!
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#endif
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/*
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* void bus_space_write_N(bus_space_tag_t tag,
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* bus_space_handle_t bsh, bus_size_t offset,
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* uintN_t value);
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*
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* Write the 1, 2, 4, or 8 byte value `value' to bus space
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* described by tag/handle/offset.
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*/
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#define bus_space_write_1(t, h, o, v) \
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do { \
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(void) t; \
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*(volatile uint8_t *)((h) + (o)) = (v); \
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} while (0)
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#define bus_space_write_2(t, h, o, v) \
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do { \
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(void) t; \
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*(volatile uint16_t *)((h) + (o)) = (v); \
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} while (0)
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#define bus_space_write_4(t, h, o, v) \
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do { \
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(void) t; \
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*(volatile uint32_t *)((h) + (o)) = (v); \
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} while (0)
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#if 0 /* Cause a link error for bus_space_write_8 */
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#define bus_space_write_8 !!! bus_space_write_8 not implemented !!!
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#endif
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/*
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* Operations which handle byte stream data on word access.
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*
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* These functions are defined to resolve endian mismatch, by either
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* - When normal (i.e. stream-less) operations perform byte swap
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* to resolve endian mismatch, these functions bypass the byte swap.
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* or
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* - When bus bridge performs automatic byte swap, these functions
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* perform byte swap once more, to cancel the bridge's behavior.
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*
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* Currently these are just same as normal operations, since all
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* supported buses are same endian with CPU (i.e. little-endian).
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*
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*/
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#define bus_space_read_stream_2(tag, bsh, offset) \
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bus_space_read_2(tag, bsh, offset)
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#define bus_space_read_stream_4(tag, bsh, offset) \
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bus_space_read_4(tag, bsh, offset)
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#define bus_space_read_stream_8(tag, bsh, offset) \
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bus_space_read_8(tag, bsh, offset)
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#define bus_space_read_multi_stream_2(tag, bsh, offset, datap, count) \
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bus_space_read_multi_2(tag, bsh, offset, datap, count)
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#define bus_space_read_multi_stream_4(tag, bsh, offset, datap, count) \
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bus_space_read_multi_4(tag, bsh, offset, datap, count)
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#define bus_space_read_multi_stream_8(tag, bsh, offset, datap, count) \
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bus_space_read_multi_8(tag, bsh, offset, datap, count)
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#define bus_space_read_region_stream_2(tag, bsh, offset, datap, count) \
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bus_space_read_region_2(tag, bsh, offset, datap, count)
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#define bus_space_read_region_stream_4(tag, bsh, offset, datap, count) \
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bus_space_read_region_4(tag, bsh, offset, datap, count)
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#define bus_space_read_region_stream_8(tag, bsh, offset, datap, count) \
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bus_space_read_region_8(tag, bsh, offset, datap, count)
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#define bus_space_write_stream_2(tag, bsh, offset, data) \
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bus_space_write_2(tag, bsh, offset, data)
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#define bus_space_write_stream_4(tag, bsh, offset, data) \
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bus_space_write_4(tag, bsh, offset, data)
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#define bus_space_write_stream_8(tag, bsh, offset, data) \
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bus_space_write_8(tag, bsh, offset, data)
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#define bus_space_write_multi_stream_2(tag, bsh, offset, datap, count) \
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bus_space_write_multi_2(tag, bsh, offset, datap, count)
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#define bus_space_write_multi_stream_4(tag, bsh, offset, datap, count) \
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bus_space_write_multi_4(tag, bsh, offset, datap, count)
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#define bus_space_write_multi_stream_8(tag, bsh, offset, datap, count) \
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bus_space_write_multi_8(tag, bsh, offset, datap, count)
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#define bus_space_write_region_stream_2(tag, bsh, offset, datap, count) \
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bus_space_write_region_2(tag, bsh, offset, datap, count)
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#define bus_space_write_region_stream_4(tag, bsh, offset, datap, count) \
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bus_space_write_region_4(tag, bsh, offset, datap, count)
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#define bus_space_write_region_stream_8(tag, bsh, offset, datap, count) \
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bus_space_write_region_8(tag, bsh, offset, datap, count)
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#define bus_space_write_region_stream_2(tag, bsh, offset, datap, count) \
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bus_space_write_region_2(tag, bsh, offset, datap, count)
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#define bus_space_write_region_stream_4(tag, bsh, offset, datap, count) \
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bus_space_write_region_4(tag, bsh, offset, datap, count)
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#define bus_space_write_region_stream_8(tag, bsh, offset, datap, count) \
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bus_space_write_region_8(tag, bsh, offset, datap, count)
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#define bus_space_set_multi_stream_2(tag, bsh, offset, data, count) \
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bus_space_set_multi_2(tag, bsh, offset, data, count)
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#define bus_space_set_multi_stream_4(tag, bsh, offset, data, count) \
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bus_space_set_multi_4(tag, bsh, offset, data, count)
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#define bus_space_set_multi_stream_8(tag, bsh, offset, data, count) \
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bus_space_set_multi_8(tag, bsh, offset, data, count)
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#define bus_space_set_region_stream_2(tag, bsh, offset, data, count) \
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bus_space_set_region_2(tag, bsh, offset, data, count)
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#define bus_space_set_region_stream_4(tag, bsh, offset, data, count) \
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bus_space_set_region_4(tag, bsh, offset, data, count)
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#define bus_space_set_region_stream_8(tag, bsh, offset, data, count) \
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bus_space_set_region_8(tag, bsh, offset, data, count)
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/*
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* Bus read/write barrier methods.
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*
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* void bus_space_barrier(bus_space_tag_t tag,
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* bus_space_handle_t bsh, bus_size_t offset,
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* bus_size_t len, int flags);
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*
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* On the MIPS, we just flush the write buffer.
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*/
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#define bus_space_barrier(t, h, o, l, f) \
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((void)((void)(t), (void)(h), (void)(o), (void)(l), (void)(f), \
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wbflush()))
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#include <mips/bus_dma_funcs.h>
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#endif /* _COBALT_BUS_FUNCS_H_ */
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