WebSVN – HelenOS – Diff – /trunk/kernel/arch/arm32/src/asm.S


#
# Copyright (c) 2007 Michal Kebrt
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# - Redistributions of source code must retain the above copyright
#   notice, this list of conditions and the following disclaimer.
# - Redistributions in binary form must reproduce the above copyright
#   notice, this list of conditions and the following disclaimer in the
#   documentation and/or other materials provided with the distribution.
# - The name of the author may not be used to endorse or promote products
#   derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
 
	
.text
 
.global memsetb
.global memcpy
.global memcpy_from_uspace
.global memcpy_to_uspace
.global memcpy_from_uspace_failover_address
.global memcpy_to_uspace_failover_address
 
memsetb:
	b _memsetb
 
memcpy:
memcpy_from_uspace:
memcpy_to_uspace:
	add     r3, r1, #3
	bic     r3, r3, #3
	cmp     r1, r3
	stmdb   sp!, {r4, lr}
	beq     4f
1:
	cmp     r2, #0
	movne   ip, #0
	beq     3f
2:
	ldrb    r3, [ip, r1]
	strb    r3, [ip, r0]
	add     ip, ip, #1
	cmp     ip, r2
	bne     2b
3:
	mov     r0, r1
	ldmia   sp!, {r4, pc}
4:
	add     r3, r0, #3
	bic     r3, r3, #3
	cmp     r0, r3
	bne     1b
	movs    r4, r2, lsr #2
	moveq   lr, r4
	beq     6f
	mov     lr, #0
	mov     ip, lr
5:
	ldr     r3, [ip, r1]
	add     lr, lr, #1
	cmp     lr, r4
	str     r3, [ip, r0]
	add     ip, ip, #4
	bne     5b
6:
	ands    r4, r2, #3
	beq     3b
	mov     r3, lr, lsl #2
	add     r0, r3, r0
	add     ip, r3, r1
	mov     r2, #0
7:
	ldrb    r3, [r2, ip]
	strb    r3, [r2, r0]
	add     r2, r2, #1
	cmp     r2, r4
	bne     7b
	b       3b
 
memcpy_from_uspace_failover_address:
memcpy_to_uspace_failover_address:
	mov		r0, #0
	ldmia   sp!, {r4, pc}
 

Rev 2464	Rev 2465
1	#	1	#
2	# Copyright (c) 2007 Michal Kebrt	2	# Copyright (c) 2007 Michal Kebrt
3	# All rights reserved.	3	# All rights reserved.
4	#	4	#
5	# Redistribution and use in source and binary forms, with or without	5	# Redistribution and use in source and binary forms, with or without
6	# modification, are permitted provided that the following conditions	6	# modification, are permitted provided that the following conditions
7	# are met:	7	# are met:
8	#	8	#
9	# - Redistributions of source code must retain the above copyright	9	# - Redistributions of source code must retain the above copyright
10	# notice, this list of conditions and the following disclaimer.	10	# notice, this list of conditions and the following disclaimer.
11	# - Redistributions in binary form must reproduce the above copyright	11	# - Redistributions in binary form must reproduce the above copyright
12	# notice, this list of conditions and the following disclaimer in the	12	# notice, this list of conditions and the following disclaimer in the
13	# documentation and/or other materials provided with the distribution.	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	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.	15	# derived from this software without specific prior written permission.
16	#	16	#
17	# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	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	18	# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	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	23	# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	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	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.	26	# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	#	27	#
28		28
29		29
30	.text	30	.text
31		31
32	.global memsetb	32	.global memsetb
33	.global memcpy	33	.global memcpy
34	.global memcpy_from_uspace	34	.global memcpy_from_uspace
35	.global memcpy_to_uspace	35	.global memcpy_to_uspace
36	.global memcpy_from_uspace_failover_address	36	.global memcpy_from_uspace_failover_address
37	.global memcpy_to_uspace_failover_address	37	.global memcpy_to_uspace_failover_address
38		38
39	memsetb:	39	memsetb:
40	b _memsetb	40	b _memsetb
41		41
42	memcpy:	42	memcpy:
43	memcpy_from_uspace:	43	memcpy_from_uspace:
44	memcpy_to_uspace:	44	memcpy_to_uspace:
45	add r3, r1, #3	45	add r3, r1, #3
46	bic r3, r3, #3	46	bic r3, r3, #3
47	cmp r1, r3	47	cmp r1, r3
48	stmdb sp!, {r4, lr}	48	stmdb sp!, {r4, lr}
49	beq 4f	49	beq 4f
50	1:	50	1:
51	cmp r2, #0	51	cmp r2, #0
52	movne ip, #0	52	movne ip, #0
53	beq 3f	53	beq 3f
54	2:	54	2:
55	ldrb r3, [ip, r1]	55	ldrb r3, [ip, r1]
56	strb r3, [ip, r0]	56	strb r3, [ip, r0]
57	add ip, ip, #1	57	add ip, ip, #1
58	cmp ip, r2	58	cmp ip, r2
59	bne 2b	59	bne 2b
60	3:	60	3:
61	mov r0, r1	61	mov r0, r1
62	ldmia sp!, {r4, pc}	62	ldmia sp!, {r4, pc}
63	4:	63	4:
64	add r3, r0, #3	64	add r3, r0, #3
65	bic r3, r3, #3	65	bic r3, r3, #3
66	cmp r0, r3	66	cmp r0, r3
67	bne 1b	67	bne 1b
68	movs r4, r2, lsr #2	68	movs r4, r2, lsr #2
69	moveq lr, r4	69	moveq lr, r4
70	beq 6f	70	beq 6f
71	mov lr, #0	71	mov lr, #0
72	mov ip, lr	72	mov ip, lr
73	5:	73	5:
74	ldr r3, [ip, r1]	74	ldr r3, [ip, r1]
75	add lr, lr, #1	75	add lr, lr, #1
76	cmp lr, r4	76	cmp lr, r4
77	str r3, [ip, r0]	77	str r3, [ip, r0]
78	add ip, ip, #4	78	add ip, ip, #4
79	bne 5b	79	bne 5b
80	6:	80	6:
81	ands r4, r2, #3	81	ands r4, r2, #3
82	beq 3b	82	beq 3b
83	mov r3, lr, lsl #2	83	mov r3, lr, lsl #2
84	add r0, r3, r0	84	add r0, r3, r0
85	add ip, r3, r1	85	add ip, r3, r1
86	mov r2, #0	86	mov r2, #0
87	7:	87	7:
88	ldrb r3, [r2, ip]	88	ldrb r3, [r2, ip]
89	strb r3, [r2, r0]	89	strb r3, [r2, r0]
90	add r2, r2, #1	90	add r2, r2, #1
91	cmp r2, r4	91	cmp r2, r4
92	bne 7b	92	bne 7b
93	b 3b	93	b 3b
94		94
95	memcpy_from_uspace_failover_address:	95	memcpy_from_uspace_failover_address:
96	memcpy_to_uspace_failover_address:	96	memcpy_to_uspace_failover_address:
97	mov r0, #0	97	mov r0, #0
98	ldmia sp!, {r4, pc}	98	ldmia sp!, {r4, pc}
99		99

Subversion Repositories HelenOS

(root)/trunk/kernel/arch/arm32/src/asm.S – Rev 2464 → 2465