WebSVN – HelenOS – Diff – /trunk/kernel/arch/ppc32/src/asm.S


#
# Copyright (c) 2005 Martin Decky
# 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.
#
 
#include <arch/asm/regname.h>
 
.text
 
.global userspace_asm
.global iret
.global iret_syscall
.global memsetb
.global memcpy
.global memcpy_from_uspace
.global memcpy_to_uspace
.global memcpy_from_uspace_failover_address
.global memcpy_to_uspace_failover_address
 
userspace_asm:
 
	# r3 = uspace_uarg
	# r4 = stack
	# r5 = entry
	
	# disable interrupts
 
	mfmsr r31
	rlwinm r31, r31, 0, 17, 15
	mtmsr r31
	
	# set entry point
	
	mtsrr0 r5
	
	# set problem state, enable interrupts
	
	ori r31, r31, msr_pr
	ori r31, r31, msr_ee
	mtsrr1 r31
	
	# set stack
	
	mr sp, r4
	
	# jump to userspace
	
	rfi
 
iret:
	
	# disable interrupts
	
	mfmsr r31
	rlwinm r31, r31, 0, 17, 15
	mtmsr r31
	
	lwz r0, 8(sp)
	lwz r2, 12(sp)
	lwz r3, 16(sp)
	lwz r4, 20(sp)
	lwz r5, 24(sp)
	lwz r6, 28(sp)
	lwz r7, 32(sp)
	lwz r8, 36(sp)
	lwz r9, 40(sp)
	lwz r10, 44(sp)
	lwz r11, 48(sp)
	lwz r13, 52(sp)
	lwz r14, 56(sp)
	lwz r15, 60(sp)
	lwz r16, 64(sp)
	lwz r17, 68(sp)
	lwz r18, 72(sp)
	lwz r19, 76(sp)
	lwz r20, 80(sp)
	lwz r21, 84(sp)
	lwz r22, 88(sp)
	lwz r23, 92(sp)
	lwz r24, 96(sp)
	lwz r25, 100(sp)
	lwz r26, 104(sp)
	lwz r27, 108(sp)
	lwz r28, 112(sp)
	lwz r29, 116(sp)
	lwz r30, 120(sp)
	lwz r31, 124(sp)
	
	lwz r12, 128(sp)
	mtcr r12
	
	lwz r12, 132(sp)
	mtsrr0 r12
	
	lwz r12, 136(sp)
	mtsrr1 r12
	
	lwz r12, 140(sp)
	mtlr r12
	
	lwz r12, 144(sp)
	mtctr r12
	
	lwz r12, 148(sp)
	mtxer r12
	
	lwz r12, 152(sp)
	lwz sp, 156(sp)
	
	rfi
 
iret_syscall:
	
	# reset decrementer
 
	li r31, 1000
	mtdec r31
	
	# disable interrupts
	
	mfmsr r31
	rlwinm r31, r31, 0, 17, 15
	mtmsr r31
	
	lwz r0, 8(sp)
	lwz r2, 12(sp)
	lwz r4, 20(sp)
	lwz r5, 24(sp)
	lwz r6, 28(sp)
	lwz r7, 32(sp)
	lwz r8, 36(sp)
	lwz r9, 40(sp)
	lwz r10, 44(sp)
	lwz r11, 48(sp)
	lwz r13, 52(sp)
	lwz r14, 56(sp)
	lwz r15, 60(sp)
	lwz r16, 64(sp)
	lwz r17, 68(sp)
	lwz r18, 72(sp)
	lwz r19, 76(sp)
	lwz r20, 80(sp)
	lwz r21, 84(sp)
	lwz r22, 88(sp)
	lwz r23, 92(sp)
	lwz r24, 96(sp)
	lwz r25, 100(sp)
	lwz r26, 104(sp)
	lwz r27, 108(sp)
	lwz r28, 112(sp)
	lwz r29, 116(sp)
	lwz r30, 120(sp)
	lwz r31, 124(sp)
	
	lwz r12, 128(sp)
	mtcr r12
	
	lwz r12, 132(sp)
	mtsrr0 r12
	
	lwz r12, 136(sp)
	mtsrr1 r12
	
	lwz r12, 140(sp)
	mtlr r12
	
	lwz r12, 144(sp)
	mtctr r12
	
	lwz r12, 148(sp)
	mtxer r12
	
	lwz r12, 152(sp)
	lwz sp, 156(sp)
 
	rfi
	
memsetb:
	rlwimi r5, r5, 8, 16, 23
	rlwimi r5, r5, 16, 0, 15
	
	addi r14, r3, -4
	
	cmplwi 0, r4, 4
	blt 7f
	
	stwu r5, 4(r14)
	beqlr
	
	andi. r15, r14, 3
	add r4, r15, r4
	subf r14, r15, r14
	srwi r15, r4, 2
	mtctr r15
	
	bdz 6f
	
	1:
		stwu r5, 4(r14)
		bdnz 1b
	
	6:
	
	andi. r4, r4, 3
	
	7:
	
	cmpwi 0, r4, 0
	beqlr
	
	mtctr r4
	addi r6, r6, 3
	
	8:
	
	stbu r5, 1(r14)
	bdnz 8b
	
	blr
 
memcpy:
memcpy_from_uspace:
memcpy_to_uspace:
 
	srwi. r7, r5, 3
	addi r6, r3, -4
	addi r4, r4, -4
	beq	2f
	
	andi. r0, r6, 3
	mtctr r7
	bne 5f
	
	1:
	
	lwz r7, 4(r4)
	lwzu r8, 8(r4)
	stw r7, 4(r6)
	stwu r8, 8(r6)
	bdnz 1b
	
	andi. r5, r5, 7
	
	2:
	
	cmplwi 0, r5, 4
	blt 3f
	
	lwzu r0, 4(r4)
	addi r5, r5, -4
	stwu r0, 4(r6)
	
	3:
	
	cmpwi 0, r5, 0
	beqlr
	mtctr r5
	addi r4, r4, 3
	addi r6, r6, 3
	
	4:
	
	lbzu r0, 1(r4)
	stbu r0, 1(r6)
	bdnz 4b
	blr
	
	5:
	
	subfic r0, r0, 4
	mtctr r0
	
	6:
	
	lbz r7, 4(r4)
	addi r4, r4, 1
	stb r7, 4(r6)
	addi r6, r6, 1
	bdnz 6b
	subf r5, r0, r5
	rlwinm. r7, r5, 32-3, 3, 31
	beq 2b
	mtctr r7
	b 1b
 
memcpy_from_uspace_failover_address:
memcpy_to_uspace_failover_address:
	b memcpy_from_uspace_failover_address
 

Rev 1787	Rev 2071
1	#	1	#
2	# Copyright (C) 2005 Martin Decky	2	# Copyright (c) 2005 Martin Decky
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	#include <arch/asm/regname.h>	29	#include <arch/asm/regname.h>
30		30
31	.text	31	.text
32		32
33	.global userspace_asm	33	.global userspace_asm
34	.global iret	34	.global iret
35	.global iret_syscall	35	.global iret_syscall
36	.global memsetb	36	.global memsetb
37	.global memcpy	37	.global memcpy
38	.global memcpy_from_uspace	38	.global memcpy_from_uspace
39	.global memcpy_to_uspace	39	.global memcpy_to_uspace
40	.global memcpy_from_uspace_failover_address	40	.global memcpy_from_uspace_failover_address
41	.global memcpy_to_uspace_failover_address	41	.global memcpy_to_uspace_failover_address
42		42
43	userspace_asm:	43	userspace_asm:
44		44
45	# r3 = uspace_uarg	45	# r3 = uspace_uarg
46	# r4 = stack	46	# r4 = stack
47	# r5 = entry	47	# r5 = entry
48		48
49	# disable interrupts	49	# disable interrupts
50		50
51	mfmsr r31	51	mfmsr r31
52	rlwinm r31, r31, 0, 17, 15	52	rlwinm r31, r31, 0, 17, 15
53	mtmsr r31	53	mtmsr r31
54		54
55	# set entry point	55	# set entry point
56		56
57	mtsrr0 r5	57	mtsrr0 r5
58		58
59	# set problem state, enable interrupts	59	# set problem state, enable interrupts
60		60
61	ori r31, r31, msr_pr	61	ori r31, r31, msr_pr
62	ori r31, r31, msr_ee	62	ori r31, r31, msr_ee
63	mtsrr1 r31	63	mtsrr1 r31
64		64
65	# set stack	65	# set stack
66		66
67	mr sp, r4	67	mr sp, r4
68		68
69	# jump to userspace	69	# jump to userspace
70		70
71	rfi	71	rfi
72		72
73	iret:	73	iret:
74		74
75	# disable interrupts	75	# disable interrupts
76		76
77	mfmsr r31	77	mfmsr r31
78	rlwinm r31, r31, 0, 17, 15	78	rlwinm r31, r31, 0, 17, 15
79	mtmsr r31	79	mtmsr r31
80		80
81	lwz r0, 8(sp)	81	lwz r0, 8(sp)
82	lwz r2, 12(sp)	82	lwz r2, 12(sp)
83	lwz r3, 16(sp)	83	lwz r3, 16(sp)
84	lwz r4, 20(sp)	84	lwz r4, 20(sp)
85	lwz r5, 24(sp)	85	lwz r5, 24(sp)
86	lwz r6, 28(sp)	86	lwz r6, 28(sp)
87	lwz r7, 32(sp)	87	lwz r7, 32(sp)
88	lwz r8, 36(sp)	88	lwz r8, 36(sp)
89	lwz r9, 40(sp)	89	lwz r9, 40(sp)
90	lwz r10, 44(sp)	90	lwz r10, 44(sp)
91	lwz r11, 48(sp)	91	lwz r11, 48(sp)
92	lwz r13, 52(sp)	92	lwz r13, 52(sp)
93	lwz r14, 56(sp)	93	lwz r14, 56(sp)
94	lwz r15, 60(sp)	94	lwz r15, 60(sp)
95	lwz r16, 64(sp)	95	lwz r16, 64(sp)
96	lwz r17, 68(sp)	96	lwz r17, 68(sp)
97	lwz r18, 72(sp)	97	lwz r18, 72(sp)
98	lwz r19, 76(sp)	98	lwz r19, 76(sp)
99	lwz r20, 80(sp)	99	lwz r20, 80(sp)
100	lwz r21, 84(sp)	100	lwz r21, 84(sp)
101	lwz r22, 88(sp)	101	lwz r22, 88(sp)
102	lwz r23, 92(sp)	102	lwz r23, 92(sp)
103	lwz r24, 96(sp)	103	lwz r24, 96(sp)
104	lwz r25, 100(sp)	104	lwz r25, 100(sp)
105	lwz r26, 104(sp)	105	lwz r26, 104(sp)
106	lwz r27, 108(sp)	106	lwz r27, 108(sp)
107	lwz r28, 112(sp)	107	lwz r28, 112(sp)
108	lwz r29, 116(sp)	108	lwz r29, 116(sp)
109	lwz r30, 120(sp)	109	lwz r30, 120(sp)
110	lwz r31, 124(sp)	110	lwz r31, 124(sp)
111		111
112	lwz r12, 128(sp)	112	lwz r12, 128(sp)
113	mtcr r12	113	mtcr r12
114		114
115	lwz r12, 132(sp)	115	lwz r12, 132(sp)
116	mtsrr0 r12	116	mtsrr0 r12
117		117
118	lwz r12, 136(sp)	118	lwz r12, 136(sp)
119	mtsrr1 r12	119	mtsrr1 r12
120		120
121	lwz r12, 140(sp)	121	lwz r12, 140(sp)
122	mtlr r12	122	mtlr r12
123		123
124	lwz r12, 144(sp)	124	lwz r12, 144(sp)
125	mtctr r12	125	mtctr r12
126		126
127	lwz r12, 148(sp)	127	lwz r12, 148(sp)
128	mtxer r12	128	mtxer r12
129		129
130	lwz r12, 152(sp)	130	lwz r12, 152(sp)
131	lwz sp, 156(sp)	131	lwz sp, 156(sp)
132		132
133	rfi	133	rfi
134		134
135	iret_syscall:	135	iret_syscall:
136		136
137	# reset decrementer	137	# reset decrementer
138		138
139	li r31, 1000	139	li r31, 1000
140	mtdec r31	140	mtdec r31
141		141
142	# disable interrupts	142	# disable interrupts
143		143
144	mfmsr r31	144	mfmsr r31
145	rlwinm r31, r31, 0, 17, 15	145	rlwinm r31, r31, 0, 17, 15
146	mtmsr r31	146	mtmsr r31
147		147
148	lwz r0, 8(sp)	148	lwz r0, 8(sp)
149	lwz r2, 12(sp)	149	lwz r2, 12(sp)
150	lwz r4, 20(sp)	150	lwz r4, 20(sp)
151	lwz r5, 24(sp)	151	lwz r5, 24(sp)
152	lwz r6, 28(sp)	152	lwz r6, 28(sp)
153	lwz r7, 32(sp)	153	lwz r7, 32(sp)
154	lwz r8, 36(sp)	154	lwz r8, 36(sp)
155	lwz r9, 40(sp)	155	lwz r9, 40(sp)
156	lwz r10, 44(sp)	156	lwz r10, 44(sp)
157	lwz r11, 48(sp)	157	lwz r11, 48(sp)
158	lwz r13, 52(sp)	158	lwz r13, 52(sp)
159	lwz r14, 56(sp)	159	lwz r14, 56(sp)
160	lwz r15, 60(sp)	160	lwz r15, 60(sp)
161	lwz r16, 64(sp)	161	lwz r16, 64(sp)
162	lwz r17, 68(sp)	162	lwz r17, 68(sp)
163	lwz r18, 72(sp)	163	lwz r18, 72(sp)
164	lwz r19, 76(sp)	164	lwz r19, 76(sp)
165	lwz r20, 80(sp)	165	lwz r20, 80(sp)
166	lwz r21, 84(sp)	166	lwz r21, 84(sp)
167	lwz r22, 88(sp)	167	lwz r22, 88(sp)
168	lwz r23, 92(sp)	168	lwz r23, 92(sp)
169	lwz r24, 96(sp)	169	lwz r24, 96(sp)
170	lwz r25, 100(sp)	170	lwz r25, 100(sp)
171	lwz r26, 104(sp)	171	lwz r26, 104(sp)
172	lwz r27, 108(sp)	172	lwz r27, 108(sp)
173	lwz r28, 112(sp)	173	lwz r28, 112(sp)
174	lwz r29, 116(sp)	174	lwz r29, 116(sp)
175	lwz r30, 120(sp)	175	lwz r30, 120(sp)
176	lwz r31, 124(sp)	176	lwz r31, 124(sp)
177		177
178	lwz r12, 128(sp)	178	lwz r12, 128(sp)
179	mtcr r12	179	mtcr r12
180		180
181	lwz r12, 132(sp)	181	lwz r12, 132(sp)
182	mtsrr0 r12	182	mtsrr0 r12
183		183
184	lwz r12, 136(sp)	184	lwz r12, 136(sp)
185	mtsrr1 r12	185	mtsrr1 r12
186		186
187	lwz r12, 140(sp)	187	lwz r12, 140(sp)
188	mtlr r12	188	mtlr r12
189		189
190	lwz r12, 144(sp)	190	lwz r12, 144(sp)
191	mtctr r12	191	mtctr r12
192		192
193	lwz r12, 148(sp)	193	lwz r12, 148(sp)
194	mtxer r12	194	mtxer r12
195		195
196	lwz r12, 152(sp)	196	lwz r12, 152(sp)
197	lwz sp, 156(sp)	197	lwz sp, 156(sp)
198		198
199	rfi	199	rfi
200		200
201	memsetb:	201	memsetb:
202	rlwimi r5, r5, 8, 16, 23	202	rlwimi r5, r5, 8, 16, 23
203	rlwimi r5, r5, 16, 0, 15	203	rlwimi r5, r5, 16, 0, 15
204		204
205	addi r14, r3, -4	205	addi r14, r3, -4
206		206
207	cmplwi 0, r4, 4	207	cmplwi 0, r4, 4
208	blt 7f	208	blt 7f
209		209
210	stwu r5, 4(r14)	210	stwu r5, 4(r14)
211	beqlr	211	beqlr
212		212
213	andi. r15, r14, 3	213	andi. r15, r14, 3
214	add r4, r15, r4	214	add r4, r15, r4
215	subf r14, r15, r14	215	subf r14, r15, r14
216	srwi r15, r4, 2	216	srwi r15, r4, 2
217	mtctr r15	217	mtctr r15
218		218
219	bdz 6f	219	bdz 6f
220		220
221	1:	221	1:
222	stwu r5, 4(r14)	222	stwu r5, 4(r14)
223	bdnz 1b	223	bdnz 1b
224		224
225	6:	225	6:
226		226
227	andi. r4, r4, 3	227	andi. r4, r4, 3
228		228
229	7:	229	7:
230		230
231	cmpwi 0, r4, 0	231	cmpwi 0, r4, 0
232	beqlr	232	beqlr
233		233
234	mtctr r4	234	mtctr r4
235	addi r6, r6, 3	235	addi r6, r6, 3
236		236
237	8:	237	8:
238		238
239	stbu r5, 1(r14)	239	stbu r5, 1(r14)
240	bdnz 8b	240	bdnz 8b
241		241
242	blr	242	blr
243		243
244	memcpy:	244	memcpy:
245	memcpy_from_uspace:	245	memcpy_from_uspace:
246	memcpy_to_uspace:	246	memcpy_to_uspace:
247		247
248	srwi. r7, r5, 3	248	srwi. r7, r5, 3
249	addi r6, r3, -4	249	addi r6, r3, -4
250	addi r4, r4, -4	250	addi r4, r4, -4
251	beq 2f	251	beq 2f
252		252
253	andi. r0, r6, 3	253	andi. r0, r6, 3
254	mtctr r7	254	mtctr r7
255	bne 5f	255	bne 5f
256		256
257	1:	257	1:
258		258
259	lwz r7, 4(r4)	259	lwz r7, 4(r4)
260	lwzu r8, 8(r4)	260	lwzu r8, 8(r4)
261	stw r7, 4(r6)	261	stw r7, 4(r6)
262	stwu r8, 8(r6)	262	stwu r8, 8(r6)
263	bdnz 1b	263	bdnz 1b
264		264
265	andi. r5, r5, 7	265	andi. r5, r5, 7
266		266
267	2:	267	2:
268		268
269	cmplwi 0, r5, 4	269	cmplwi 0, r5, 4
270	blt 3f	270	blt 3f
271		271
272	lwzu r0, 4(r4)	272	lwzu r0, 4(r4)
273	addi r5, r5, -4	273	addi r5, r5, -4
274	stwu r0, 4(r6)	274	stwu r0, 4(r6)
275		275
276	3:	276	3:
277		277
278	cmpwi 0, r5, 0	278	cmpwi 0, r5, 0
279	beqlr	279	beqlr
280	mtctr r5	280	mtctr r5
281	addi r4, r4, 3	281	addi r4, r4, 3
282	addi r6, r6, 3	282	addi r6, r6, 3
283		283
284	4:	284	4:
285		285
286	lbzu r0, 1(r4)	286	lbzu r0, 1(r4)
287	stbu r0, 1(r6)	287	stbu r0, 1(r6)
288	bdnz 4b	288	bdnz 4b
289	blr	289	blr
290		290
291	5:	291	5:
292		292
293	subfic r0, r0, 4	293	subfic r0, r0, 4
294	mtctr r0	294	mtctr r0
295		295
296	6:	296	6:
297		297
298	lbz r7, 4(r4)	298	lbz r7, 4(r4)
299	addi r4, r4, 1	299	addi r4, r4, 1
300	stb r7, 4(r6)	300	stb r7, 4(r6)
301	addi r6, r6, 1	301	addi r6, r6, 1
302	bdnz 6b	302	bdnz 6b
303	subf r5, r0, r5	303	subf r5, r0, r5
304	rlwinm. r7, r5, 32-3, 3, 31	304	rlwinm. r7, r5, 32-3, 3, 31
305	beq 2b	305	beq 2b
306	mtctr r7	306	mtctr r7
307	b 1b	307	b 1b
308		308
309	memcpy_from_uspace_failover_address:	309	memcpy_from_uspace_failover_address:
310	memcpy_to_uspace_failover_address:	310	memcpy_to_uspace_failover_address:
311	b memcpy_from_uspace_failover_address	311	b memcpy_from_uspace_failover_address
312		312

Subversion Repositories HelenOS

(root)/trunk/kernel/arch/ppc32/src/asm.S – Rev 1787 → 2071