WebSVN – HelenOS-historic – Diff – /kernel/trunk/arch/ppc32/src/exception.S


#
# Copyright (C) 2006 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>
#include <arch/mm/page.h>
 
.section K_UNMAPPED_TEXT_START, "ax"
 
.macro CONTEXT_STORE
	
	# save R12 in SPRG1, backup CR in R12
	# save SP in SPRG2
 
	mtsprg1 r12
	mfcr r12
	mtsprg2 sp
	
	# check whether SP is in kernel
	
	andis. sp, sp, 0x8000
	bne 1f
	
		# stack is in user-space
		
		mfsprg0 sp
	
	b 2f
	
	1:
	
		# stack is in kernel
		
		mfsprg2 sp
		subis sp, sp, 0x8000
	
	2:
	
	subi sp, sp, 160
	stw r0, 8(sp)
	stw r2, 12(sp)
	stw r3, 16(sp)
	stw r4, 20(sp)
	stw r5, 24(sp)
	stw r6, 28(sp)
	stw r7, 32(sp)
	stw r8, 36(sp)
	stw r9, 40(sp)
	stw r10, 44(sp)
	stw r11, 48(sp)
	stw r13, 52(sp)
	stw r14, 56(sp)
	stw r15, 60(sp)
	stw r16, 64(sp)
	stw r17, 68(sp)
	stw r18, 72(sp)
	stw r19, 76(sp)
	stw r20, 80(sp)
	stw r21, 84(sp)
	stw r22, 88(sp)
	stw r23, 92(sp)
	stw r24, 96(sp)
	stw r25, 100(sp)
	stw r26, 104(sp)
	stw r27, 108(sp)
	stw r28, 112(sp)
	stw r29, 116(sp)
	stw r30, 120(sp)
	stw r31, 124(sp)
	
	stw r12, 128(sp)
	
	mfsrr0 r12
	stw r12, 132(sp)
	
	mfsrr1 r12
	stw r12, 136(sp)
	
	mflr r12
	stw r12, 140(sp)
	
	mfctr r12
	stw r12, 144(sp)
	
	mfxer r12
	stw r12, 148(sp)
	
	mfsprg1 r12
	stw r12, 152(sp)
	
	mfsprg2 r12
	stw r12, 156(sp)
.endm
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
.org 0x100
.global exc_system_reset
exc_system_reset:
	CONTEXT_STORE
	
	lis r12, exc_dispatch@ha
	addi r12, r12, exc_dispatch@l
	mtsrr0 r12
	
	li r3, 0
	b jump_to_kernel
 
.org 0x200
.global exc_machine_check
exc_machine_check:
	CONTEXT_STORE
	
	lis r12, exc_dispatch@ha
	addi r12, r12, exc_dispatch@l
	mtsrr0 r12
	
	li r3, 1
	b jump_to_kernel
 
.org 0x300
.global exc_data_storage
exc_data_storage:
	CONTEXT_STORE
	
	lis r12, exc_dispatch@ha
	addi r12, r12, exc_dispatch@l
	mtsrr0 r12
	
	li r3, 2
	b jump_to_kernel
 
.org 0x400
.global exc_instruction_storage
exc_instruction_storage:
	CONTEXT_STORE
	
	lis r12, exc_dispatch@ha
	addi r12, r12, exc_dispatch@l
	mtsrr0 r12
	
	li r3, 3
	b jump_to_kernel
 
.org 0x500
.global exc_external
exc_external:
	CONTEXT_STORE
	
	lis r12, exc_dispatch@ha
	addi r12, r12, exc_dispatch@l
	mtsrr0 r12
	
	li r3, 4
	b jump_to_kernel
 
.org 0x600
.global exc_alignment
exc_alignment:
	CONTEXT_STORE
	
	lis r12, exc_dispatch@ha
	addi r12, r12, exc_dispatch@l
	mtsrr0 r12
	
	li r3, 5
	b jump_to_kernel
 
.org 0x700
.global exc_program
exc_program:
	CONTEXT_STORE
	
	lis r12, exc_dispatch@ha
	addi r12, r12, exc_dispatch@l
	mtsrr0 r12
	
	li r3, 6
	b jump_to_kernel
 
.org 0x800
.global exc_fp_unavailable
exc_fp_unavailable:
	CONTEXT_STORE
	
	lis r12, exc_dispatch@ha
	addi r12, r12, exc_dispatch@l
	mtsrr0 r12
	
	li r3, 7
	b jump_to_kernel
 
.org 0x900
.global exc_decrementer
exc_decrementer:
	CONTEXT_STORE
 
	lis r12, exc_dispatch@ha
	addi r12, r12, exc_dispatch@l
	mtsrr0 r12
	
	li r3, 8
	b jump_to_kernel
 
.org 0xa00
.global exc_reserved0
exc_reserved0:
	CONTEXT_STORE
	
	lis r12, exc_dispatch@ha
	addi r12, r12, exc_dispatch@l
	mtsrr0 r12
	
	li r3, 9
	b jump_to_kernel
 
.org 0xb00
.global exc_reserved1
exc_reserved1:
	CONTEXT_STORE
	
	lis r12, exc_dispatch@ha
	addi r12, r12, exc_dispatch@l
	mtsrr0 r12
	
	li r3, 10
	b jump_to_kernel
 
.org 0xc00
.global exc_syscall
exc_syscall:
	CONTEXT_STORE	
	
	b jump_to_kernel_syscall
 
.org 0xd00
.global exc_trace
exc_trace:
	CONTEXT_STORE
	
	lis r12, exc_dispatch@ha
	addi r12, r12, exc_dispatch@l
	mtsrr0 r12
	
	li r3, 12
	b jump_to_kernel
 
.org 0x4000
jump_to_kernel:
	lis r12, iret@ha
	addi r12, r12, iret@l
	mtlr r12
 
	mfmsr r12
	ori r12, r12, (msr_ir | msr_dr)@l
	mtsrr1 r12
	
	addis sp, sp, 0x8000
	mr r4, sp
	addi r4, r4, 8
	
	rfi
 
jump_to_kernel_syscall:
	lis r12, syscall_handler@ha
	addi r12, r12, syscall_handler@l
	mtsrr0 r12
	
	lis r12, iret_syscall@ha
	addi r12, r12, iret_syscall@l
	mtlr r12
 
	mfmsr r12
	ori r12, r12, (msr_ir | msr_dr)@l
	mtsrr1 r12
	
	addis sp, sp, 0x8000
	rfi
 

Rev 1609	Rev 1716
1	#	1	#
2	# Copyright (C) 2006 Martin Decky	2	# Copyright (C) 2006 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	#include <arch/mm/page.h>	30	#include <arch/mm/page.h>
31		31
32	.section K_UNMAPPED_TEXT_START, "ax"	32	.section K_UNMAPPED_TEXT_START, "ax"
33		33
34	.macro CONTEXT_STORE	34	.macro CONTEXT_STORE
35		35
36	# save R12 in SPRG1, backup CR in R12	36	# save R12 in SPRG1, backup CR in R12
37	# save SP in SPRG2	37	# save SP in SPRG2
38		38
39	mtsprg1 r12	39	mtsprg1 r12
40	mfcr r12	40	mfcr r12
41	mtsprg2 sp	41	mtsprg2 sp
42		42
43	# check whether SP is in kernel	43	# check whether SP is in kernel
44		44
45	andis. sp, sp, 0x8000	45	andis. sp, sp, 0x8000
46	bne 1f	46	bne 1f
47		47
48	# stack is in user-space	48	# stack is in user-space
49		49
50	mfsprg0 sp	50	mfsprg0 sp
51		51
52	b 2f	52	b 2f
53		53
54	1:	54	1:
55		55
56	# stack is in kernel	56	# stack is in kernel
57		57
58	mfsprg2 sp	58	mfsprg2 sp
59	subis sp, sp, 0x8000	59	subis sp, sp, 0x8000
60		60
61	2:	61	2:
62		62
63	subi sp, sp, 160	63	subi sp, sp, 160
64	stw r0, 8(sp)	64	stw r0, 8(sp)
65	stw r2, 12(sp)	65	stw r2, 12(sp)
66	stw r3, 16(sp)	66	stw r3, 16(sp)
67	stw r4, 20(sp)	67	stw r4, 20(sp)
68	stw r5, 24(sp)	68	stw r5, 24(sp)
69	stw r6, 28(sp)	69	stw r6, 28(sp)
70	stw r7, 32(sp)	70	stw r7, 32(sp)
71	stw r8, 36(sp)	71	stw r8, 36(sp)
72	stw r9, 40(sp)	72	stw r9, 40(sp)
73	stw r10, 44(sp)	73	stw r10, 44(sp)
74	stw r11, 48(sp)	74	stw r11, 48(sp)
75	stw r13, 52(sp)	75	stw r13, 52(sp)
76	stw r14, 56(sp)	76	stw r14, 56(sp)
77	stw r15, 60(sp)	77	stw r15, 60(sp)
78	stw r16, 64(sp)	78	stw r16, 64(sp)
79	stw r17, 68(sp)	79	stw r17, 68(sp)
80	stw r18, 72(sp)	80	stw r18, 72(sp)
81	stw r19, 76(sp)	81	stw r19, 76(sp)
82	stw r20, 80(sp)	82	stw r20, 80(sp)
83	stw r21, 84(sp)	83	stw r21, 84(sp)
84	stw r22, 88(sp)	84	stw r22, 88(sp)
85	stw r23, 92(sp)	85	stw r23, 92(sp)
86	stw r24, 96(sp)	86	stw r24, 96(sp)
87	stw r25, 100(sp)	87	stw r25, 100(sp)
88	stw r26, 104(sp)	88	stw r26, 104(sp)
89	stw r27, 108(sp)	89	stw r27, 108(sp)
90	stw r28, 112(sp)	90	stw r28, 112(sp)
91	stw r29, 116(sp)	91	stw r29, 116(sp)
92	stw r30, 120(sp)	92	stw r30, 120(sp)
93	stw r31, 124(sp)	93	stw r31, 124(sp)
94		94
95	stw r12, 128(sp)	95	stw r12, 128(sp)
96		96
97	mfsrr0 r12	97	mfsrr0 r12
98	stw r12, 132(sp)	98	stw r12, 132(sp)
99		99
100	mfsrr1 r12	100	mfsrr1 r12
101	stw r12, 136(sp)	101	stw r12, 136(sp)
102		102
103	mflr r12	103	mflr r12
104	stw r12, 140(sp)	104	stw r12, 140(sp)
105		105
106	mfctr r12	106	mfctr r12
107	stw r12, 144(sp)	107	stw r12, 144(sp)
108		108
109	mfxer r12	109	mfxer r12
110	stw r12, 148(sp)	110	stw r12, 148(sp)
111		111
112	mfsprg1 r12	112	mfsprg1 r12
113	stw r12, 152(sp)	113	stw r12, 152(sp)
114		114
115	mfsprg2 r12	115	mfsprg2 r12
116	stw r12, 156(sp)	116	stw r12, 156(sp)
117	.endm	117	.endm
118		118
119	.org 0x060	-
120	jump_to_kernel:	-
121	lis r12, iret@ha	-
122	addi r12, r12, iret@l	-
123	mtlr r12	-
124		-
125	mfmsr r12	-
126	ori r12, r12, (msr_ir \| msr_dr)@l	-
127	mtsrr1 r12	-
128		-
129	addis sp, sp, 0x8000	-
130	mr r4, sp	-
131	addi r4, r4, 8	-
132		-
133	rfi	-
134		-
135	jump_to_kernel_syscall:	-
136	lis r12, syscall_handler@ha	-
137	addi r12, r12, syscall_handler@l	-
138	mtsrr0 r12	-
139		-
140	lis r12, iret_syscall@ha	-
141	addi r12, r12, iret_syscall@l	-
142	mtlr r12	-
143		-
144	mfmsr r12	-
145	ori r12, r12, (msr_ir \| msr_dr)@l	-
146	mtsrr1 r12	-
147		-
148	addis sp, sp, 0x8000	-
149	rfi	-
150		-
151	.org 0x100	119	.org 0x100
152	.global exc_system_reset	120	.global exc_system_reset
153	exc_system_reset:	121	exc_system_reset:
154	CONTEXT_STORE	122	CONTEXT_STORE
155		123
156	lis r12, exc_dispatch@ha	124	lis r12, exc_dispatch@ha
157	addi r12, r12, exc_dispatch@l	125	addi r12, r12, exc_dispatch@l
158	mtsrr0 r12	126	mtsrr0 r12
159		127
160	li r3, 0	128	li r3, 0
161	b jump_to_kernel	129	b jump_to_kernel
162		130
163	.org 0x200	131	.org 0x200
164	.global exc_machine_check	132	.global exc_machine_check
165	exc_machine_check:	133	exc_machine_check:
166	CONTEXT_STORE	134	CONTEXT_STORE
167		135
168	lis r12, exc_dispatch@ha	136	lis r12, exc_dispatch@ha
169	addi r12, r12, exc_dispatch@l	137	addi r12, r12, exc_dispatch@l
170	mtsrr0 r12	138	mtsrr0 r12
171		139
172	li r3, 1	140	li r3, 1
173	b jump_to_kernel	141	b jump_to_kernel
174		142
175	.org 0x300	143	.org 0x300
176	.global exc_data_storage	144	.global exc_data_storage
177	exc_data_storage:	145	exc_data_storage:
178	CONTEXT_STORE	146	CONTEXT_STORE
179		147
180	lis r12, exc_dispatch@ha	148	lis r12, exc_dispatch@ha
181	addi r12, r12, exc_dispatch@l	149	addi r12, r12, exc_dispatch@l
182	mtsrr0 r12	150	mtsrr0 r12
183		151
184	li r3, 2	152	li r3, 2
185	b jump_to_kernel	153	b jump_to_kernel
186		154
187	.org 0x400	155	.org 0x400
188	.global exc_instruction_storage	156	.global exc_instruction_storage
189	exc_instruction_storage:	157	exc_instruction_storage:
190	CONTEXT_STORE	158	CONTEXT_STORE
191		159
192	lis r12, exc_dispatch@ha	160	lis r12, exc_dispatch@ha
193	addi r12, r12, exc_dispatch@l	161	addi r12, r12, exc_dispatch@l
194	mtsrr0 r12	162	mtsrr0 r12
195		163
196	li r3, 3	164	li r3, 3
197	b jump_to_kernel	165	b jump_to_kernel
198		166
199	.org 0x500	167	.org 0x500
200	.global exc_external	168	.global exc_external
201	exc_external:	169	exc_external:
202	CONTEXT_STORE	170	CONTEXT_STORE
203		171
204	lis r12, exc_dispatch@ha	172	lis r12, exc_dispatch@ha
205	addi r12, r12, exc_dispatch@l	173	addi r12, r12, exc_dispatch@l
206	mtsrr0 r12	174	mtsrr0 r12
207		175
208	li r3, 4	176	li r3, 4
209	b jump_to_kernel	177	b jump_to_kernel
210		178
211	.org 0x600	179	.org 0x600
212	.global exc_alignment	180	.global exc_alignment
213	exc_alignment:	181	exc_alignment:
214	CONTEXT_STORE	182	CONTEXT_STORE
215		183
216	lis r12, exc_dispatch@ha	184	lis r12, exc_dispatch@ha
217	addi r12, r12, exc_dispatch@l	185	addi r12, r12, exc_dispatch@l
218	mtsrr0 r12	186	mtsrr0 r12
219		187
220	li r3, 5	188	li r3, 5
221	b jump_to_kernel	189	b jump_to_kernel
222		190
223	.org 0x700	191	.org 0x700
224	.global exc_program	192	.global exc_program
225	exc_program:	193	exc_program:
226	CONTEXT_STORE	194	CONTEXT_STORE
227		195
228	lis r12, exc_dispatch@ha	196	lis r12, exc_dispatch@ha
229	addi r12, r12, exc_dispatch@l	197	addi r12, r12, exc_dispatch@l
230	mtsrr0 r12	198	mtsrr0 r12
231		199
232	li r3, 6	200	li r3, 6
233	b jump_to_kernel	201	b jump_to_kernel
234		202
235	.org 0x800	203	.org 0x800
236	.global exc_fp_unavailable	204	.global exc_fp_unavailable
237	exc_fp_unavailable:	205	exc_fp_unavailable:
238	CONTEXT_STORE	206	CONTEXT_STORE
239		207
240	lis r12, exc_dispatch@ha	208	lis r12, exc_dispatch@ha
241	addi r12, r12, exc_dispatch@l	209	addi r12, r12, exc_dispatch@l
242	mtsrr0 r12	210	mtsrr0 r12
243		211
244	li r3, 7	212	li r3, 7
245	b jump_to_kernel	213	b jump_to_kernel
246		214
247	.org 0x900	215	.org 0x900
248	.global exc_decrementer	216	.global exc_decrementer
249	exc_decrementer:	217	exc_decrementer:
250	CONTEXT_STORE	218	CONTEXT_STORE
251		219
252	lis r12, exc_dispatch@ha	220	lis r12, exc_dispatch@ha
253	addi r12, r12, exc_dispatch@l	221	addi r12, r12, exc_dispatch@l
254	mtsrr0 r12	222	mtsrr0 r12
255		223
256	li r3, 8	224	li r3, 8
257	b jump_to_kernel	225	b jump_to_kernel
258		226
259	.org 0xa00	227	.org 0xa00
260	.global exc_reserved0	228	.global exc_reserved0
261	exc_reserved0:	229	exc_reserved0:
262	CONTEXT_STORE	230	CONTEXT_STORE
263		231
264	lis r12, exc_dispatch@ha	232	lis r12, exc_dispatch@ha
265	addi r12, r12, exc_dispatch@l	233	addi r12, r12, exc_dispatch@l
266	mtsrr0 r12	234	mtsrr0 r12
267		235
268	li r3, 9	236	li r3, 9
269	b jump_to_kernel	237	b jump_to_kernel
270		238
271	.org 0xb00	239	.org 0xb00
272	.global exc_reserved1	240	.global exc_reserved1
273	exc_reserved1:	241	exc_reserved1:
274	CONTEXT_STORE	242	CONTEXT_STORE
275		243
276	lis r12, exc_dispatch@ha	244	lis r12, exc_dispatch@ha
277	addi r12, r12, exc_dispatch@l	245	addi r12, r12, exc_dispatch@l
278	mtsrr0 r12	246	mtsrr0 r12
279		247
280	li r3, 10	248	li r3, 10
281	b jump_to_kernel	249	b jump_to_kernel
282		250
283	.org 0xc00	251	.org 0xc00
284	.global exc_syscall	252	.global exc_syscall
285	exc_syscall:	253	exc_syscall:
286	CONTEXT_STORE	254	CONTEXT_STORE
287		255
288	b jump_to_kernel_syscall	256	b jump_to_kernel_syscall
289		257
290	.org 0xd00	258	.org 0xd00
291	.global exc_trace	259	.global exc_trace
292	exc_trace:	260	exc_trace:
293	CONTEXT_STORE	261	CONTEXT_STORE
294		262
295	lis r12, exc_dispatch@ha	263	lis r12, exc_dispatch@ha
296	addi r12, r12, exc_dispatch@l	264	addi r12, r12, exc_dispatch@l
297	mtsrr0 r12	265	mtsrr0 r12
298		266
299	li r3, 12	267	li r3, 12
300	b jump_to_kernel	268	b jump_to_kernel
-		269
-		270	.org 0x4000
-		271	jump_to_kernel:
-		272	lis r12, iret@ha
-		273	addi r12, r12, iret@l
-		274	mtlr r12
-		275
-		276	mfmsr r12
-		277	ori r12, r12, (msr_ir \| msr_dr)@l
-		278	mtsrr1 r12
-		279
-		280	addis sp, sp, 0x8000
-		281	mr r4, sp
-		282	addi r4, r4, 8
-		283
-		284	rfi
-		285
-		286	jump_to_kernel_syscall:
-		287	lis r12, syscall_handler@ha
-		288	addi r12, r12, syscall_handler@l
-		289	mtsrr0 r12
-		290
-		291	lis r12, iret_syscall@ha
-		292	addi r12, r12, iret_syscall@l
-		293	mtlr r12
-		294
-		295	mfmsr r12
-		296	ori r12, r12, (msr_ir \| msr_dr)@l
-		297	mtsrr1 r12
-		298
-		299	addis sp, sp, 0x8000
-		300	rfi
301		301

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/ppc32/src/exception.S – Rev 1609 → 1716