d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Macros for accessing alpha sparse device ports and memory.

Browse Source
This commit is contained in:
Doug Rabson 1998-07-27 09:40:35 +00:00
parent 86dd710847
commit 3260ced375
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=37882
1 changed files with 67 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

67
sys/alpha/include/swiz.h Normal file
View File

@ -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_ */