Subversion Repositories HelenOS-historic

Rev

Rev 1771 | Rev 1778 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
1018 decky 1
#
2
# Copyright (C) 2006 Martin Decky
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
.text
30
 
31
.global halt
1685 decky 32
.global memcpy
1018 decky 33
.global jump_to_kernel
34
 
35
halt:
36
	b halt
37
	nop
1685 decky 38
 
39
memcpy:
1773 jermar 40
	.register       %g2, #scratch
41
        .register       %g3, #scratch
42
	add	%o1, 7, %g1
43
	and	%g1, -8, %g1
44
	cmp	%o1, %g1
45
	be,pn	%xcc, 3f
46
	add	%o0, 7, %g1
47
	mov	0, %g3
48
0:
49
	brz,pn	%o2, 2f
50
	mov	0, %g2
51
1:
52
	ldub	[%g3 + %o1], %g1
53
	add	%g2, 1, %g2
54
	cmp	%o2, %g2
55
	stb	%g1, [%g3 + %o0]
56
	bne,pt	%xcc, 1b
57
	mov	%g2, %g3
58
2:
59
	jmp	%o7 + 8			! exit point
60
	mov	%o1, %o0
61
3:
62
	and	%g1, -8, %g1
63
	cmp	%o0, %g1
64
	bne,pt	%xcc, 0b
65
	mov	0, %g3
66
	srlx	%o2, 3, %g4
67
	brz,pn	%g4, 5f
68
	mov	0, %g5
69
4:
70
	sllx	%g3, 3, %g2
71
	add	%g5, 1, %g3
72
	ldx	[%o1 + %g2], %g1
73
	mov	%g3, %g5
74
	cmp	%g4, %g3
75
	bne,pt	%xcc, 4b
76
	stx	%g1, [%o0 + %g2]
77
5:
78
	and	%o2, 7, %o2
79
	brz,pn	%o2, 2b
80
	sllx	%g4, 3, %g1
81
	mov	0, %g2
82
	add	%g1, %o0, %o0
83
	add	%g1, %o1, %g4
84
	mov	0, %g3
85
6:
86
	ldub	[%g2 + %g4], %g1
87
	stb	%g1, [%g2 + %o0]
88
	add	%g3, 1, %g2
89
	cmp	%o2, %g2
90
	bne,pt	%xcc, 6b
91
	mov	%g2, %g3
1685 decky 92
 
1773 jermar 93
	jmp	%o7 + 8			! exit point
94
	mov	%o1, %o0
95
 
1018 decky 96
jump_to_kernel:
1771 jermar 97
	b jump_to_kernel
1018 decky 98
	nop