0c2b180a35
to bus_space(9) and that uses the proto(4) driver for talking to hardware. If the I/O resource is a memory mapped I/O resource, then mmap(2) will be attempted to avoid read(2)/write(2) overhead. Sponsored by: Juniper Networks, Inc.
43 lines
1.8 KiB
C
43 lines
1.8 KiB
C
/*-
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* Copyright (c) 2014 Marcel Moolenaar
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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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*
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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 ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _LIBBUS_SPACE_H_
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#define _LIBBUS_SPACE_H_
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int bus_space_map(const char *dev);
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int bus_space_read_1(int rid, long ofs);
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int bus_space_read_2(int rid, long ofs);
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int64_t bus_space_read_4(int rid, long ofs);
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int bus_space_subregion(int rid, long ofs, long sz);
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int bus_space_unmap(int rid);
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int bus_space_write_1(int rid, long ofs, uint8_t val);
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int bus_space_write_2(int rid, long ofs, uint16_t val);
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int bus_space_write_4(int rid, long ofs, uint32_t val);
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#endif /* _LIBBUS_SPACE_H_ */
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