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 */
55ENTRY(a4x_bs_r_1)
56	ldr	r0, [r1, r2, LSL #2]
57	and	r0, r0, #0xff
58	mov	pc, lr
59END(a4x_bs_r_1)
60
61ENTRY(a4x_bs_r_2)
62	ldr	r0, [r1, r2, LSL #2]
63	mov	r1, #0xff
64	orr	r1, r1, r1, lsl #8
65	and	r0, r0, r1
66	mov	pc, lr
67END(a4x_bs_r_2)
68
69ENTRY(a4x_bs_r_4)
70	ldr	r0, [r1, r2, LSL #2]
71	mov	pc, lr
72END(a4x_bs_r_4)
73
74/*
75 * Write single
76 */
77ENTRY(a4x_bs_w_1)
78	and	r3, r3, #0xff
79	str	r3, [r1, r2, LSL #2]
80	mov	pc, lr
81END(a4x_bs_w_1)
82
83ENTRY(a4x_bs_w_2)
84	mov	r0, #0xff
85	orr	r0, r0, r0, lsl #8
86	and	r3, r3, r0
87	str	r3, [r1, r2, LSL #2]
88	mov	pc, lr
89END(a4x_bs_w_2)
90
91ENTRY(a4x_bs_w_4)
92	str	r3, [r1, r2, LSL #2]
93	mov	pc, lr
94END(a4x_bs_w_4)
95
96/*
97 * Read multiple
98 */
99ENTRY(a4x_bs_rm_1)
100	add	r0, r1, r2, lsl #2
101	ldr	r2, [sp, #0]
102	mov	r1, r3
103	teq	r2, #0
104	moveq	pc, lr
1051:	ldr	r3, [r0]
106	subs	r2, r2, #1
107	strb	r3, [r1], #1
108	bne	1b
109	mov	pc, lr
110END(a4x_bs_rm_1)
111
112ENTRY(a4x_bs_rm_2)
113	add	r0, r1, r2, lsl #2
114	ldr	r2, [sp, #0]
115	mov	r1, r3
116	teq	r2, #0
117	moveq	pc, lr
1181:	ldr	r3, [r0]
119	subs	r2, r2, #1
120	strh	r3, [r1], #2
121	bne	1b
122	mov	pc, lr
123END(a4x_bs_rm_2)
124
125/*
126 * Write multiple
127 */
128ENTRY(a4x_bs_wm_1)
129	add	r0, r1, r2, lsl #2
130	ldr	r2, [sp, #0]
131	mov	r1, r3
132	teq	r2, #0
133	moveq	pc, lr
1341:	ldrb	r3, [r1], #1
135	subs	r2, r2, #1
136	str	r3, [r0]
137	bne	1b
138	mov	pc, lr
139END(a4x_bs_wm_1)
140
141ENTRY(a4x_bs_wm_2)
142	add	r0, r1, r2, lsl #2
143	ldr	r2, [sp, #0]
144	mov	r1, r3
145	teq	r2, #0
146	moveq	pc, lr
1471:	ldrh	r3, [r1], #2
148	subs	r2, r2, #1
149	str	r3, [r0]
150	bne	1b
151	mov	pc, lr
152END(a4x_bs_wm_2)
153