1/*	$NetBSD: podulebus_io_asm.S,v 1.1 2001/10/05 22:27:58 reinoud Exp $	*/
2
3/*
4 * Copyright (c) 1997 Mark Brinicombe.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *	This product includes software developed by Mark Brinicombe.
18 * 4. The name of the company nor the name of the author may be used to
19 *    endorse or promote products derived from this software without specific
20 *    prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
26 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
27 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#include <machine/asm.h>
36
37/*
38 * bus_space I/O functions for podulebus
39 */
40
41/*
42 * read single
43 */
44
45ENTRY(podulebus_bs_r_1)
46	mov	r2, r2, lsl r0
47	ldrb	r0, [r1, r2]
48	mov	pc, lr
49
50ENTRY(podulebus_bs_r_2)
51	mov	r2, r2, lsl r0
52	ldr	r0, [r1, r2]
53	bic	r0, r0, #0xff000000
54	bic	r0, r0, #0x00ff0000
55	mov	pc, lr
56
57ENTRY(podulebus_bs_r_4)
58	mov	r2, r2, lsl r0
59	ldr	r0, [r1, r2]
60	mov	pc, lr
61
62/*
63 * write single
64 */
65
66ENTRY(podulebus_bs_w_1)
67	mov	r2, r2, lsl r0
68	strb	r3, [r1, r2]
69	mov	pc, lr
70
71ENTRY(podulebus_bs_w_2)
72	mov	r3, r3, lsl #16
73	orr	r3, r3, r3, lsr #16
74	mov	r2, r2, lsl r0
75	str	r3, [r1, r2]
76	mov	pc, lr
77
78ENTRY(podulebus_bs_w_4)
79	mov	r2, r2, lsl r0
80	str	r3, [r1, r2]
81	mov	pc, lr
82
83/*
84 * read multiple
85 */
86
87ENTRY(podulebus_bs_rm_1)
88	add	r0, r1, r2, lsl r0
89	ldr	r2, [sp, #0]
90
91	/* Make sure that we have a positive length */
92	cmp	r2, #0x00000000
93	movle	pc, lr
94
95podulebus_rm_1_loop:
96	ldrb	r1, [r0]
97	strb	r1, [r3], #0x0001
98	subs	r2, r2, #0x00000001
99	bgt	podulebus_rm_1_loop
100
101	mov	pc, lr
102
103ENTRY(podulebus_bs_rm_2)
104	add	r0, r1, r2, lsl r0
105	mov	r1, r3
106	ldr	r2, [sp, #0]
107	b	_C_LABEL(insw)
108
109/*
110 * write multiple
111 */
112
113ENTRY(podulebus_bs_wm_1)
114	add	r0, r1, r2, lsl r0
115	ldr	r2, [sp, #0]
116
117	/* Make sure that we have a positive length */
118	cmp	r2, #0x00000000
119	movle	pc, lr
120
121podulebus_wm_1_loop:
122	ldrb	r1, [r3], #0x0001
123	strb	r1, [r0]
124	subs	r2, r2, #0x00000001
125	bgt	podulebus_wm_1_loop
126
127	mov	pc, lr
128
129ENTRY(podulebus_bs_wm_2)
130	add	r0, r1, r2, lsl r0
131	mov	r1, r3
132	ldr	r2, [sp, #0]
133	b	_C_LABEL(outsw)
134