1 /* $NetBSD: amiga_bus_simple_4.c,v 1.10 2011/10/30 08:33:43 rkujawa Exp $ */
2
3 /*-
4 * Copyright (c) 1999 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Ignatios Souvatzis.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 __KERNEL_RCSID(1, "$NetBSD: amiga_bus_simple_4.c,v 1.10 2011/10/30 08:33:43 rkujawa Exp $");
34
35 #define AMIGA_SIMPLE_BUS_STRIDE 4 /* 1 byte per long */
36 #define AMIGA_SIMPLE_BUS_WORD_METHODS
37 #define AMIGA_SIMPLE_BUS_LONGWORD_METHODS
38
39 #include "simple_busfuncs.c"
40
41 /*
42 * Little-endian word methods.
43 * Stream access does not swap, used for 16-bit and 32-bit wide transfers
44 * of byte streams. Non-stream access swaps bytes.
45 * XXX Only *_multi_2 and *_multi_4 transfers currently swap bytes XXX
46 */
47
48 bsrm(oabs(bsrm2_swap_), u_int16_t);
49 bswm(oabs(bswm2_swap_), u_int16_t);
50 bsrm(oabs(bsrm4_swap_), u_int32_t);
51 bswm(oabs(bswm4_swap_), u_int32_t);
52
53 void
oabs(bsrm2_swap_)54 oabs(bsrm2_swap_)(bus_space_handle_t handle, bus_size_t offset,
55 u_int16_t *pointer, bus_size_t count)
56 {
57 volatile u_int16_t *p;
58
59 p = (volatile u_int16_t *)(handle + offset * AMIGA_SIMPLE_BUS_STRIDE);
60
61 while (count > 0) {
62 *pointer++ = bswap16(*p);
63 amiga_bus_reorder_protect();
64 --count;
65 }
66 }
67
68 void
oabs(bswm2_swap_)69 oabs(bswm2_swap_)(bus_space_handle_t handle, bus_size_t offset,
70 const u_int16_t *pointer, bus_size_t count)
71 {
72 volatile u_int16_t *p;
73
74 p = (volatile u_int16_t *)(handle + offset * AMIGA_SIMPLE_BUS_STRIDE);
75
76 while (count > 0) {
77 *p = bswap16(*pointer);
78 amiga_bus_reorder_protect();
79 ++pointer;
80 --count;
81 }
82 }
83
84 void
oabs(bsrm4_swap_)85 oabs(bsrm4_swap_)(bus_space_handle_t handle, bus_size_t offset,
86 u_int32_t *pointer, bus_size_t count)
87 {
88 volatile u_int32_t *p;
89
90 p = (volatile u_int32_t *)(handle + offset * AMIGA_SIMPLE_BUS_STRIDE);
91
92 while (count > 0) {
93 *pointer++ = bswap32(*p);
94 amiga_bus_reorder_protect();
95 --count;
96 }
97 }
98
99 void
oabs(bswm4_swap_)100 oabs(bswm4_swap_)(bus_space_handle_t handle, bus_size_t offset,
101 const u_int32_t *pointer, bus_size_t count)
102 {
103 volatile u_int32_t *p;
104
105 p = (volatile u_int32_t *)(handle + offset * AMIGA_SIMPLE_BUS_STRIDE);
106
107 while (count > 0) {
108 *p = bswap32(*pointer);
109 amiga_bus_reorder_protect();
110 ++pointer;
111 --count;
112 }
113 }
114
115 const struct amiga_bus_space_methods amiga_bus_stride_4swap = {
116
117 .bsm = oabs(bsm_),
118 .bsms = oabs(bsms_),
119 .bsu = oabs(bsu_),
120 .bsa = NULL,
121 .bsf = NULL,
122
123 .bsr1 = oabs(bsr1_),
124 .bsw1 = oabs(bsw1_),
125 .bsrm1 = oabs(bsrm1_),
126 .bswm1 = oabs(bswm1_),
127 .bsrr1 = oabs(bsrr1_),
128 .bswr1 = oabs(bswr1_),
129 .bssr1 = oabs(bssr1_),
130 .bscr1 = oabs(bscr1_),
131
132 .bsr2 = oabs(bsr2_), /* XXX swap? */
133 .bsw2 = oabs(bsw2_), /* XXX swap? */
134 .bsrs2 = oabs(bsr2_),
135 .bsws2 = oabs(bsw2_),
136 .bsrm2 = oabs(bsrm2_swap_),
137 .bswm2 = oabs(bswm2_swap_),
138 .bsrms2 = oabs(bsrm2_),
139 .bswms2 = oabs(bswm2_),
140 .bsrr2 = oabs(bsrr2_), /* XXX swap? */
141 .bswr2 = oabs(bswr2_), /* XXX swap? */
142 .bsrrs2 = oabs(bsrr2_),
143 .bswrs2 = oabs(bswr2_),
144 .bssr2 = oabs(bssr2_), /* XXX swap? */
145 .bscr2 = oabs(bscr2_), /* XXX swap? */
146
147 .bsr4 = oabs(bsr4_), /* XXX swap? */
148 .bsw4 = oabs(bsw4_), /* XXX swap? */
149 .bsrs4 = oabs(bsr4_),
150 .bsws4 = oabs(bsw4_),
151 .bsrm4 = oabs(bsrm4_swap_),
152 .bswm4 = oabs(bswm4_swap_),
153 .bsrms4 = oabs(bsrm4_),
154 .bswms4 = oabs(bswm4_),
155 .bsrr4 = oabs(bsrr4_), /* XXX swap? */
156 .bswr4 = oabs(bswr4_), /* XXX swap? */
157 .bsrrs4 = oabs(bsrr4_),
158 .bswrs4 = oabs(bswr4_),
159 .bssr4 = oabs(bssr4_), /* XXX swap? */
160 .bscr4 = oabs(bscr4_) /* XXX swap? */
161 };
162
163