2 * Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice unmodified, this list of conditions, and the following
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
31 #include <sys/systm.h>
34 #include <machine/bus.h>
35 #include <mips/atheros/ar71xx_bus_space_reversed.h>
37 static bs_r_1_proto(reversed);
38 static bs_r_2_proto(reversed);
39 static bs_w_1_proto(reversed);
40 static bs_w_2_proto(reversed);
43 * Bus space that handles offsets in word for 1/2 bytes read/write access.
44 * Byte order of values is handled by device drivers itself.
46 static struct bus_space bus_space_reversed = {
50 /* mapping/unmapping */
55 /* allocation/deallocation */
116 /* read (single) stream */
122 /* read multiple stream */
128 /* read region stream */
134 /* write (single) stream */
140 /* write multiple stream */
146 /* write region stream */
153 bus_space_tag_t ar71xx_bus_space_reversed = &bus_space_reversed;
156 reversed_bs_r_1(void *t, bus_space_handle_t h, bus_size_t o)
159 return readb(h + (o &~ 3) + (3 - (o & 3)));
163 reversed_bs_w_1(void *t, bus_space_handle_t h, bus_size_t o, u_int8_t v)
166 writeb(h + (o &~ 3) + (3 - (o & 3)), v);
170 reversed_bs_r_2(void *t, bus_space_handle_t h, bus_size_t o)
173 return readw(h + (o &~ 3) + (2 - (o & 3)));
177 reversed_bs_w_2(void *t, bus_space_handle_t h, bus_size_t o, uint16_t v)
180 writew(h + (o &~ 3) + (2 - (o & 3)), v);