2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@FreeBSD.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice unmodified, this list of conditions, and the following
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
33 #include <sys/systm.h>
36 #include <machine/bus.h>
37 #include <mips/atheros/ar71xx_bus_space_reversed.h>
39 static bs_r_1_proto(reversed);
40 static bs_r_2_proto(reversed);
41 static bs_w_1_proto(reversed);
42 static bs_w_2_proto(reversed);
45 * Bus space that handles offsets in word for 1/2 bytes read/write access.
46 * Byte order of values is handled by device drivers itself.
48 static struct bus_space bus_space_reversed = {
52 /* mapping/unmapping */
57 /* allocation/deallocation */
118 /* read (single) stream */
124 /* read multiple stream */
130 /* read region stream */
136 /* write (single) stream */
142 /* write multiple stream */
148 /* write region stream */
155 bus_space_tag_t ar71xx_bus_space_reversed = &bus_space_reversed;
158 reversed_bs_r_1(void *t, bus_space_handle_t h, bus_size_t o)
161 return readb(h + (o &~ 3) + (3 - (o & 3)));
165 reversed_bs_w_1(void *t, bus_space_handle_t h, bus_size_t o, u_int8_t v)
168 writeb(h + (o &~ 3) + (3 - (o & 3)), v);
172 reversed_bs_r_2(void *t, bus_space_handle_t h, bus_size_t o)
175 return readw(h + (o &~ 3) + (2 - (o & 3)));
179 reversed_bs_w_2(void *t, bus_space_handle_t h, bus_size_t o, uint16_t v)
182 writew(h + (o &~ 3) + (2 - (o & 3)), v);