freebsd-dev/sys/alpha/include/swiz.h

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/*-
* 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.
*
1999-08-28 01:08:13 +00:00
* $FreeBSD$
*/
#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_ADDRESS(base, o) ((base) + SPARSE_BYTE_OFFSET(o))
#define SPARSE_WORD_ADDRESS(base, o) ((base) + SPARSE_WORD_OFFSET(o))
#define SPARSE_LONG_ADDRESS(base, o) ((base) + SPARSE_LONG_OFFSET(o))
#define SPARSE_BYTE_EXTRACT(o, d) ((d) >> (8*((o) & 3)))
#define SPARSE_WORD_EXTRACT(o, d) ((d) >> (8*((o) & 2)))
#define SPARSE_LONG_EXTRACT(o, d) (d)
#define SPARSE_BYTE_INSERT(o, d) ((d) << (8*((o) & 3)))
#define SPARSE_WORD_INSERT(o, d) ((d) << (8*((o) & 2)))
#define SPARSE_LONG_INSERT(o, d) (d)
#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)
#ifdef _KERNEL
/*
* A kernel object for accessing memory-like spaces (port and
* memory spaces) using SWIZ instructions.
*/
typedef u_int32_t (*swiz_sethae_fn)(void *arg, u_int32_t hae);
struct swiz_space {
struct alpha_busspace_ops *ops;
u_int64_t base; /* base address of space */
swiz_sethae_fn sethae; /* function to set HAE */
void *arg; /* arg to sethae() */
};
void swiz_init_space(struct swiz_space *swiz, u_int64_t base);
void swiz_init_space_hae(struct swiz_space *swiz, u_int64_t base,
swiz_sethae_fn sethae, void *arg);
#endif /* _KERNEL */
#endif /* !_MACHINE_SWIZ_H_ */