Subversion Repositories HelenOS

Rev

Rev 3274 | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
2172 kebrt 1
#
2
# Copyright (c) 2007 Michal Kebrt
3
# All rights reserved.
4
#
5
# Redistribution and use in source and binary forms, with or without
6
# modification, are permitted provided that the following conditions
7
# are met:
8
#
9
# - Redistributions of source code must retain the above copyright
10
#   notice, this list of conditions and the following disclaimer.
11
# - Redistributions in binary form must reproduce the above copyright
12
#   notice, this list of conditions and the following disclaimer in the
13
#   documentation and/or other materials provided with the distribution.
14
# - The name of the author may not be used to endorse or promote products
15
#   derived from this software without specific prior written permission.
16
#
17
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
#
28
 
29
 
30
.text
31
 
32
.global memsetb
33
.global memcpy
34
.global memcpy_from_uspace
35
.global memcpy_to_uspace
36
.global memcpy_from_uspace_failover_address
37
.global memcpy_to_uspace_failover_address
38
 
2300 kebrt 39
memsetb:
40
	b _memsetb
41
 
2172 kebrt 42
memcpy:
43
memcpy_from_uspace:
44
memcpy_to_uspace:
45
	add     r3, r1, #3
46
	bic     r3, r3, #3
47
	cmp     r1, r3
3274 jermar 48
	stmdb   sp!, {r4, r5, lr}
49
	mov	r5, r0			/* save dst */
2329 kebrt 50
	beq     4f
51
1:
2172 kebrt 52
	cmp     r2, #0
53
	movne   ip, #0
2329 kebrt 54
	beq     3f
55
2:
2172 kebrt 56
	ldrb    r3, [ip, r1]
57
	strb    r3, [ip, r0]
58
	add     ip, ip, #1
59
	cmp     ip, r2
2329 kebrt 60
	bne     2b
61
3:
3274 jermar 62
	mov     r0, r5
63
	ldmia   sp!, {r4, r5, pc}
2329 kebrt 64
4:
2172 kebrt 65
	add     r3, r0, #3
66
	bic     r3, r3, #3
67
	cmp     r0, r3
2329 kebrt 68
	bne     1b
2172 kebrt 69
	movs    r4, r2, lsr #2
70
	moveq   lr, r4
2329 kebrt 71
	beq     6f
2172 kebrt 72
	mov     lr, #0
73
	mov     ip, lr
2329 kebrt 74
5:
2172 kebrt 75
	ldr     r3, [ip, r1]
76
	add     lr, lr, #1
77
	cmp     lr, r4
78
	str     r3, [ip, r0]
79
	add     ip, ip, #4
2329 kebrt 80
	bne     5b
81
6:
2172 kebrt 82
	ands    r4, r2, #3
2329 kebrt 83
	beq     3b
2172 kebrt 84
	mov     r3, lr, lsl #2
85
	add     r0, r3, r0
86
	add     ip, r3, r1
87
	mov     r2, #0
2329 kebrt 88
7:
2172 kebrt 89
	ldrb    r3, [r2, ip]
90
	strb    r3, [r2, r0]
91
	add     r2, r2, #1
92
	cmp     r2, r4
2329 kebrt 93
	bne     7b
94
	b       3b
2172 kebrt 95
 
96
memcpy_from_uspace_failover_address:
97
memcpy_to_uspace_failover_address:
3274 jermar 98
	mov	r0, #0
99
	ldmia   sp!, {r4, r5, pc}