1 /* $NetBSD: ixp425_a4x_io.S,v 1.2 2005/12/11 12:16:51 christos Exp $ */
2
3 /*
4 * Copyright 2003 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Steve C. Woodford for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed for the NetBSD Project by
20 * Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 * or promote products derived from this software without specific prior
23 * written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 /*
39 * There are simple bus space functions for IO registers mapped at
40 * 32-bit aligned positions. offset is multiplied by 4.
41 *
42 * Based loosely on pxa2x0_a2x_io.S
43 */
44
45 #include <machine/asm.h>
46 __FBSDID("$FreeBSD$");
47
48 /*
49 * bus_space I/O functions with offset*4
50 */
51
52 /*
53 * Read single
54 */
55 ENTRY(a4x_bs_r_1)
56 ldr r0, [r1, r2, LSL #2]
57 and r0, r0, #0xff
58 mov pc, lr
59
60 ENTRY(a4x_bs_r_2)
61 ldr r0, [r1, r2, LSL #2]
62 mov r1, #0xff
63 orr r1, r1, r1, lsl #8
64 and r0, r0, r1
65 mov pc, lr
66
67 ENTRY(a4x_bs_r_4)
68 ldr r0, [r1, r2, LSL #2]
69 mov pc, lr
70
71 /*
72 * Write single
73 */
74 ENTRY(a4x_bs_w_1)
75 and r3, r3, #0xff
76 str r3, [r1, r2, LSL #2]
77 mov pc, lr
78
79 ENTRY(a4x_bs_w_2)
80 mov r0, #0xff
81 orr r0, r0, r0, lsl #8
82 and r3, r3, r0
83 str r3, [r1, r2, LSL #2]
84 mov pc, lr
85
86 ENTRY(a4x_bs_w_4)
87 str r3, [r1, r2, LSL #2]
88 mov pc, lr
89
90 /*
91 * Read multiple
92 */
93 ENTRY(a4x_bs_rm_1)
94 add r0, r1, r2, lsl #2
95 ldr r2, [sp, #0]
96 mov r1, r3
97 teq r2, #0
98 moveq pc, lr
99 1: ldr r3, [r0]
100 subs r2, r2, #1
101 strb r3, [r1], #1
102 bne 1b
103 mov pc, lr
104
105 ENTRY(a4x_bs_rm_2)
106 add r0, r1, r2, lsl #2
107 ldr r2, [sp, #0]
108 mov r1, r3
109 teq r2, #0
110 moveq pc, lr
111 1: ldr r3, [r0]
112 subs r2, r2, #1
113 strh r3, [r1], #2
114 bne 1b
115 mov pc, lr
116
117 /*
118 * Write multiple
119 */
120 ENTRY(a4x_bs_wm_1)
121 add r0, r1, r2, lsl #2
122 ldr r2, [sp, #0]
123 mov r1, r3
124 teq r2, #0
125 moveq pc, lr
126 1: ldrb r3, [r1], #1
127 subs r2, r2, #1
128 str r3, [r0]
129 bne 1b
130 mov pc, lr
131
132 ENTRY(a4x_bs_wm_2)
133 add r0, r1, r2, lsl #2
134 ldr r2, [sp, #0]
135 mov r1, r3
136 teq r2, #0
137 moveq pc, lr
138 1: ldrh r3, [r1], #2
139 subs r2, r2, #1
140 str r3, [r0]
141 bne 1b
142 mov pc, lr
Cache object: 6d8d117842da84b33742d7179ba8a7c7
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