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author | Doug Rabson <dfr@FreeBSD.org> | 1998-07-27 09:40:35 +0000 |
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committer | Doug Rabson <dfr@FreeBSD.org> | 1998-07-27 09:40:35 +0000 |
commit | 3260ced375b81e9ffb7695f28919ba3a9a9dcbe5 (patch) | |
tree | 470fddc81615dce432a458573d43626cd247c0dd /sys/alpha/include/swiz.h | |
parent | 86dd710847fe72250dd6e996945de008bbc1dbbe (diff) | |
download | src-3260ced375b81e9ffb7695f28919ba3a9a9dcbe5.tar.gz src-3260ced375b81e9ffb7695f28919ba3a9a9dcbe5.zip |
Macros for accessing alpha sparse device ports and memory.
Notes
Notes:
svn path=/head/; revision=37882
Diffstat (limited to 'sys/alpha/include/swiz.h')
-rw-r--r-- | sys/alpha/include/swiz.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/sys/alpha/include/swiz.h b/sys/alpha/include/swiz.h new file mode 100644 index 000000000000..0305952360a4 --- /dev/null +++ b/sys/alpha/include/swiz.h @@ -0,0 +1,67 @@ +/*- + * Copyright (c) 1998 Doug Rabson + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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. + * + * $Id$ + */ + +#ifndef _MACHINE_SWIZ_H_ +#define _MACHINE_SWIZ_H_ + +/* + * Macros for accessing device ports or memory in a sparse address space. + */ + +#define SPARSE_READ(o) (*(u_int32_t*) (o)) +#define SPARSE_WRITE(o, d) (*(u_int32_t*) (o) = (d)) + +#define SPARSE_BYTE_OFFSET(o) (((o) << 5) | (0 << 3)) +#define SPARSE_WORD_OFFSET(o) (((o) << 5) | (1 << 3)) +#define SPARSE_LONG_OFFSET(o) (((o) << 5) | (3 << 3)) + +#define SPARSE_BYTE_EXTRACT(o, d) ((d) >> (8*((o) & 3))) +#define SPARSE_WORD_EXTRACT(o, d) ((d) >> (8*((o) & 2))) + +#define SPARSE_BYTE_INSERT(o, d) ((d) << (8*((o) & 3))) +#define SPARSE_WORD_INSERT(o, d) ((d) << (8*((o) & 2))) + +#define SPARSE_READ_BYTE(base, o) \ + SPARSE_BYTE_EXTRACT(o, SPARSE_READ(base + SPARSE_BYTE_OFFSET(o))) + +#define SPARSE_READ_WORD(base, o) \ + SPARSE_WORD_EXTRACT(o, SPARSE_READ(base + SPARSE_WORD_OFFSET(o))) + +#define SPARSE_READ_LONG(base, o) \ + SPARSE_READ(base + SPARSE_LONG_OFFSET(o)) + +#define SPARSE_WRITE_BYTE(base, o, d) \ + SPARSE_WRITE(base + SPARSE_BYTE_OFFSET(o), SPARSE_BYTE_INSERT(o, d)) + +#define SPARSE_WRITE_WORD(base, o, d) \ + SPARSE_WRITE(base + SPARSE_WORD_OFFSET(o), SPARSE_WORD_INSERT(o, d)) + +#define SPARSE_WRITE_LONG(base, o, d) \ + SPARSE_WRITE(base + SPARSE_LONG_OFFSET(o), d) + +#endif /* !_MACHINE_SWIZ_H_ */ |