1 /* $NetBSD: bcopyinout.S,v 1.11 2003/10/13 21:22:40 scw Exp $ */
2
3 /*-
4 * Copyright (c) 2002 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Allen Briggs 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 #include "assym.inc"
40
41 #include <machine/asm.h>
42 #include <sys/errno.h>
43
44 __FBSDID("$FreeBSD$");
45 #include <arm/arm/bcopyinout_xscale.S>
46
47 /*
48 * int badaddr_read_1(const uint8_t *src, uint8_t *dest)
49 *
50 * Copies a single 8-bit value from src to dest, returning 0 on success,
51 * else EFAULT if a page fault occurred.
52 */
53 ENTRY(badaddr_read_1)
54 GET_PCB(r2)
55 ldr r2, [r2]
56
57 ldr ip, [r2, #PCB_ONFAULT]
58 adr r3, 1f
59 str r3, [r2, #PCB_ONFAULT]
60 nop
61 nop
62 nop
63 ldrb r3, [r0]
64 nop
65 nop
66 nop
67 strb r3, [r1]
68 mov r0, #0 /* No fault */
69 1: str ip, [r2, #PCB_ONFAULT]
70 RET
71 END(badaddr_read_1)
72
73 /*
74 * int badaddr_read_2(const uint16_t *src, uint16_t *dest)
75 *
76 * Copies a single 16-bit value from src to dest, returning 0 on success,
77 * else EFAULT if a page fault occurred.
78 */
79 ENTRY(badaddr_read_2)
80 GET_PCB(r2)
81 ldr r2, [r2]
82
83 ldr ip, [r2, #PCB_ONFAULT]
84 adr r3, 1f
85 str r3, [r2, #PCB_ONFAULT]
86 nop
87 nop
88 nop
89 ldrh r3, [r0]
90 nop
91 nop
92 nop
93 strh r3, [r1]
94 mov r0, #0 /* No fault */
95 1: str ip, [r2, #PCB_ONFAULT]
96 RET
97 END(badaddr_read_2)
98
99 /*
100 * int badaddr_read_4(const uint32_t *src, uint32_t *dest)
101 *
102 * Copies a single 32-bit value from src to dest, returning 0 on success,
103 * else EFAULT if a page fault occurred.
104 */
105 ENTRY(badaddr_read_4)
106 GET_PCB(r2)
107 ldr r2, [r2]
108
109 ldr ip, [r2, #PCB_ONFAULT]
110 adr r3, 1f
111 str r3, [r2, #PCB_ONFAULT]
112 nop
113 nop
114 nop
115 ldr r3, [r0]
116 nop
117 nop
118 nop
119 str r3, [r1]
120 mov r0, #0 /* No fault */
121 1: str ip, [r2, #PCB_ONFAULT]
122 RET
123 END(badaddr_read_4)
124
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