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74 lines
2.9 KiB
C
74 lines
2.9 KiB
C
/*-
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* Copyright (c) 1998 Doug Rabson
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* All rights reserved.
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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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: swiz.h,v 1.1 1998/07/27 09:40:35 dfr Exp $
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*/
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#ifndef _MACHINE_SWIZ_H_
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#define _MACHINE_SWIZ_H_
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/*
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* Macros for accessing device ports or memory in a sparse address space.
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*/
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#define SPARSE_READ(o) (*(u_int32_t*) (o))
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#define SPARSE_WRITE(o, d) (*(u_int32_t*) (o) = (d))
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#define SPARSE_BYTE_OFFSET(o) (((o) << 5) | (0 << 3))
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#define SPARSE_WORD_OFFSET(o) (((o) << 5) | (1 << 3))
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#define SPARSE_LONG_OFFSET(o) (((o) << 5) | (3 << 3))
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#define SPARSE_BYTE_ADDRESS(base, o) ((base) + SPARSE_BYTE_OFFSET(o))
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#define SPARSE_WORD_ADDRESS(base, o) ((base) + SPARSE_WORD_OFFSET(o))
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#define SPARSE_LONG_ADDRESS(base, o) ((base) + SPARSE_LONG_OFFSET(o))
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#define SPARSE_BYTE_EXTRACT(o, d) ((d) >> (8*((o) & 3)))
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#define SPARSE_WORD_EXTRACT(o, d) ((d) >> (8*((o) & 2)))
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#define SPARSE_LONG_EXTRACT(o, d) (d)
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#define SPARSE_BYTE_INSERT(o, d) ((d) << (8*((o) & 3)))
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#define SPARSE_WORD_INSERT(o, d) ((d) << (8*((o) & 2)))
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#define SPARSE_LONG_INSERT(o, d) (d)
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#define SPARSE_READ_BYTE(base, o) \
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SPARSE_BYTE_EXTRACT(o, SPARSE_READ(base + SPARSE_BYTE_OFFSET(o)))
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#define SPARSE_READ_WORD(base, o) \
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SPARSE_WORD_EXTRACT(o, SPARSE_READ(base + SPARSE_WORD_OFFSET(o)))
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#define SPARSE_READ_LONG(base, o) \
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SPARSE_READ(base + SPARSE_LONG_OFFSET(o))
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#define SPARSE_WRITE_BYTE(base, o, d) \
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SPARSE_WRITE(base + SPARSE_BYTE_OFFSET(o), SPARSE_BYTE_INSERT(o, d))
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#define SPARSE_WRITE_WORD(base, o, d) \
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SPARSE_WRITE(base + SPARSE_WORD_OFFSET(o), SPARSE_WORD_INSERT(o, d))
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#define SPARSE_WRITE_LONG(base, o, d) \
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SPARSE_WRITE(base + SPARSE_LONG_OFFSET(o), d)
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#endif /* !_MACHINE_SWIZ_H_ */
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