WebSVN – HelenOS-historic – Diff – /SPARTAN/trunk/arch/mips/src/start.S


#
# Copyright (C) 2003-2004 Jakub Jermar
# 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.
#
 
#define __ASM__
	
#include <arch/asm/regname.h>
#include <arch/mm/page.h>
#include <arch/asm/boot.h>
#include <arch/context_offset.h>
	
.text
 
.set noat
.set noreorder
.set nomacro
 
.global kernel_image_start
.global tlb_refill_entry
.global cache_error_entry
.global exception_entry
.global userspace_asm
 
# Save registers to space defined by \r
# We will change $at on the way
.macro REGISTERS_STORE r
	sw $at,EOFFSET_AT(\r)
	sw $v0,EOFFSET_V0(\r)
	sw $v1,EOFFSET_V1(\r)
	sw $a0,EOFFSET_A0(\r)
	sw $a1,EOFFSET_A1(\r)
	sw $a2,EOFFSET_A2(\r)
	sw $a3,EOFFSET_A3(\r)
	sw $t0,EOFFSET_T0(\r)
	sw $t1,EOFFSET_T1(\r)
	sw $t2,EOFFSET_T2(\r)
	sw $t3,EOFFSET_T3(\r)
	sw $t4,EOFFSET_T4(\r)
	sw $t5,EOFFSET_T5(\r)
	sw $t6,EOFFSET_T6(\r)
	sw $t7,EOFFSET_T7(\r)
	sw $t8,EOFFSET_T8(\r)
	sw $t9,EOFFSET_T9(\r)
 
	mflo $at
	sw $at, EOFFSET_LO(\r)
	mfhi $at
	sw $at, EOFFSET_HI(\r)
	
	sw $s0,EOFFSET_S0(\r)
	sw $s1,EOFFSET_S1(\r)
	sw $s2,EOFFSET_S2(\r)
	sw $s3,EOFFSET_S3(\r)
	sw $s4,EOFFSET_S4(\r)
	sw $s5,EOFFSET_S5(\r)
	sw $s6,EOFFSET_S6(\r)
	sw $s7,EOFFSET_S7(\r)
	sw $s8,EOFFSET_S8(\r)	
	sw $gp,EOFFSET_GP(\r)
	sw $ra,EOFFSET_RA(\r)
	sw $sp,EOFFSET_SP(\r)
 
	mfc0 $at, $status
	sw $at,EOFFSET_STATUS(\r)
	mfc0 $at, $epc
	sw $at,EOFFSET_EPC(\r)
.endm
 
.macro REGISTERS_LOAD r
	lw $v0,EOFFSET_V0(\r)
	lw $v1,EOFFSET_V1(\r)
	lw $a0,EOFFSET_A0(\r)
	lw $a1,EOFFSET_A1(\r)
	lw $a2,EOFFSET_A2(\r)
	lw $a3,EOFFSET_A3(\r)
	lw $t0,EOFFSET_T0(\r)
	lw $t1,EOFFSET_T1(\r)
	lw $t2,EOFFSET_T2(\r)
	lw $t3,EOFFSET_T3(\r)
	lw $t4,EOFFSET_T4(\r)
	lw $t5,EOFFSET_T5(\r)
	lw $t6,EOFFSET_T6(\r)
	lw $t7,EOFFSET_T7(\r)
	lw $t8,EOFFSET_T8(\r)
	lw $t9,EOFFSET_T9(\r)
	lw $s0,EOFFSET_S0(\r)
	lw $s1,EOFFSET_S1(\r)
	lw $s2,EOFFSET_S2(\r)
	lw $s3,EOFFSET_S3(\r)
	lw $s4,EOFFSET_S4(\r)
	lw $s5,EOFFSET_S5(\r)
	lw $s6,EOFFSET_S6(\r)
	lw $s7,EOFFSET_S7(\r)
	lw $s8,EOFFSET_S8(\r)
	lw $gp,EOFFSET_GP(\r)
	lw $ra,EOFFSET_RA(\r)
	
	lw $at,EOFFSET_LO(\r)
	mtlo $at
	lw $at,EOFFSET_HI(\r)
	mthi $at
 
	lw $at,EOFFSET_STATUS(\r)
	mtc0 $at, $status
	lw $at,EOFFSET_EPC(\r)
	mtc0 $at, $epc
	
	lw $at,EOFFSET_AT(\r)
	lw $sp,EOFFSET_SP(\r)
.endm
 
# Move kernel stack pointer address to register K0
# - if we are in user mode, load the appropriate stack
# address
.macro KERNEL_STACK_TO_K0
	# If we are in user mode
	mfc0 $k0, $status
	andi $k0, 0x10
	
	beq $k0, $0, 1f
	add $k0, $sp, 0
	
	# Move $k0 pointer to kernel stack
	lui $k0, %hi(supervisor_sp)
	ori $k0, $k0, %lo(supervisor_sp)
	# Move $k0 (superveisor_sp)
	lw $k0, 0($k0)
1:		
.endm
		
.org 0x0
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
kernel_image_start:
	/* Load temporary stack */
	lui $sp, %hi(end_stack)
	ori $sp, $sp, %lo(end_stack)
 
	/* Not sure about this, but might be needed for PIC code???? */
	lui $gp, 0x8000
	
	jal main_bsp
	nop
 
 
	.space TEMP_STACK_SIZE
end_stack:
 
tlb_refill_entry:
	j tlb_refill_handler
	nop
 
cache_error_entry:
	j cache_error_handler
	nop
 
exception_entry:
	j exception_handler
	nop	
 
	
	
exception_handler:
 
	KERNEL_STACK_TO_K0
	sub $k0, REGISTER_SPACE
	REGISTERS_STORE $k0
	add $sp, $k0, 0
 
	add $a0, $sp, 0 
	jal exception /* exception(register_space) */
	nop
 
	REGISTERS_LOAD $sp
	# The $sp is automatically restored to former value
	eret
	nop
	
tlb_refill_handler:
	KERNEL_STACK_TO_K0
	sub $k0, REGISTER_SPACE
	REGISTERS_STORE $k0
	add $sp, $k0, 0
 
	add $a0, $sp, 0 
	jal tlb_refill /* tlb_refill(register_space) */
	nop
 
	REGISTERS_LOAD $sp
 
	eret
	nop
 
cache_error_handler:
	KERNEL_STACK_TO_K0
	sub $sp, REGISTER_SPACE
	REGISTERS_STORE $sp
	add $sp, $k0, 0
 
	jal cache_error
	nop
 
	REGISTERS_LOAD $sp
 
	eret
	nop
 
userspace_asm:
	add $sp, $a0, 0
	eret
	nop
 
 

Rev 320	Rev 326
1	#	1	#
2	# Copyright (C) 2003-2004 Jakub Jermar	2	# Copyright (C) 2003-2004 Jakub Jermar
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	#define __ASM__	29	#define __ASM__
30		30
31	#include <arch/asm/regname.h>	31	#include <arch/asm/regname.h>
32	#include <arch/mm/page.h>	32	#include <arch/mm/page.h>
33	#include <arch/asm/boot.h>	33	#include <arch/asm/boot.h>
34	#include <arch/context_offset.h>	34	#include <arch/context_offset.h>
35		35
36	.text	36	.text
37		37
38	.set noat	38	.set noat
39	.set noreorder	39	.set noreorder
40	.set nomacro	40	.set nomacro
41		41
42	.global kernel_image_start	42	.global kernel_image_start
43	.global tlb_refill_entry	43	.global tlb_refill_entry
44	.global cache_error_entry	44	.global cache_error_entry
45	.global exception_entry	45	.global exception_entry
46	.global userspace_asm	46	.global userspace_asm
47		47
48	# Save registers to space defined by \r	48	# Save registers to space defined by \r
49	# We will change $at on the way	49	# We will change $at on the way
50	.macro REGISTERS_STORE r	50	.macro REGISTERS_STORE r
51	sw $at,EOFFSET_AT(\r)	51	sw $at,EOFFSET_AT(\r)
52	sw $v0,EOFFSET_V0(\r)	52	sw $v0,EOFFSET_V0(\r)
53	sw $v1,EOFFSET_V1(\r)	53	sw $v1,EOFFSET_V1(\r)
54	sw $a0,EOFFSET_A0(\r)	54	sw $a0,EOFFSET_A0(\r)
55	sw $a1,EOFFSET_A1(\r)	55	sw $a1,EOFFSET_A1(\r)
56	sw $a2,EOFFSET_A2(\r)	56	sw $a2,EOFFSET_A2(\r)
57	sw $a3,EOFFSET_A3(\r)	57	sw $a3,EOFFSET_A3(\r)
58	sw $t0,EOFFSET_T0(\r)	58	sw $t0,EOFFSET_T0(\r)
59	sw $t1,EOFFSET_T1(\r)	59	sw $t1,EOFFSET_T1(\r)
60	sw $t2,EOFFSET_T2(\r)	60	sw $t2,EOFFSET_T2(\r)
61	sw $t3,EOFFSET_T3(\r)	61	sw $t3,EOFFSET_T3(\r)
62	sw $t4,EOFFSET_T4(\r)	62	sw $t4,EOFFSET_T4(\r)
63	sw $t5,EOFFSET_T5(\r)	63	sw $t5,EOFFSET_T5(\r)
64	sw $t6,EOFFSET_T6(\r)	64	sw $t6,EOFFSET_T6(\r)
65	sw $t7,EOFFSET_T7(\r)	65	sw $t7,EOFFSET_T7(\r)
66	sw $t8,EOFFSET_T8(\r)	66	sw $t8,EOFFSET_T8(\r)
67	sw $t9,EOFFSET_T9(\r)	67	sw $t9,EOFFSET_T9(\r)
68		68
69	mflo $at	69	mflo $at
70	sw $at, EOFFSET_LO(\r)	70	sw $at, EOFFSET_LO(\r)
71	mfhi $at	71	mfhi $at
72	sw $at, EOFFSET_HI(\r)	72	sw $at, EOFFSET_HI(\r)
73		73
74	sw $s0,EOFFSET_S0(\r)	74	sw $s0,EOFFSET_S0(\r)
75	sw $s1,EOFFSET_S1(\r)	75	sw $s1,EOFFSET_S1(\r)
76	sw $s2,EOFFSET_S2(\r)	76	sw $s2,EOFFSET_S2(\r)
77	sw $s3,EOFFSET_S3(\r)	77	sw $s3,EOFFSET_S3(\r)
78	sw $s4,EOFFSET_S4(\r)	78	sw $s4,EOFFSET_S4(\r)
79	sw $s5,EOFFSET_S5(\r)	79	sw $s5,EOFFSET_S5(\r)
80	sw $s6,EOFFSET_S6(\r)	80	sw $s6,EOFFSET_S6(\r)
81	sw $s7,EOFFSET_S7(\r)	81	sw $s7,EOFFSET_S7(\r)
82	sw $s8,EOFFSET_S8(\r)	82	sw $s8,EOFFSET_S8(\r)
83	sw $gp,EOFFSET_GP(\r)	83	sw $gp,EOFFSET_GP(\r)
84	sw $ra,EOFFSET_RA(\r)	84	sw $ra,EOFFSET_RA(\r)
85	sw $sp,EOFFSET_SP(\r)	85	sw $sp,EOFFSET_SP(\r)
86		86
87	mfc0 $at, $status	87	mfc0 $at, $status
88	sw $at,EOFFSET_STATUS(\r)	88	sw $at,EOFFSET_STATUS(\r)
89	mfc0 $at, $epc	89	mfc0 $at, $epc
90	sw $at,EOFFSET_EPC(\r)	90	sw $at,EOFFSET_EPC(\r)
91	.endm	91	.endm
92		92
93	.macro REGISTERS_LOAD r	93	.macro REGISTERS_LOAD r
94	lw $v0,EOFFSET_V0(\r)	94	lw $v0,EOFFSET_V0(\r)
95	lw $v1,EOFFSET_V1(\r)	95	lw $v1,EOFFSET_V1(\r)
96	lw $a0,EOFFSET_A0(\r)	96	lw $a0,EOFFSET_A0(\r)
97	lw $a1,EOFFSET_A1(\r)	97	lw $a1,EOFFSET_A1(\r)
98	lw $a2,EOFFSET_A2(\r)	98	lw $a2,EOFFSET_A2(\r)
99	lw $a3,EOFFSET_A3(\r)	99	lw $a3,EOFFSET_A3(\r)
100	lw $t0,EOFFSET_T0(\r)	100	lw $t0,EOFFSET_T0(\r)
101	lw $t1,EOFFSET_T1(\r)	101	lw $t1,EOFFSET_T1(\r)
102	lw $t2,EOFFSET_T2(\r)	102	lw $t2,EOFFSET_T2(\r)
103	lw $t3,EOFFSET_T3(\r)	103	lw $t3,EOFFSET_T3(\r)
104	lw $t4,EOFFSET_T4(\r)	104	lw $t4,EOFFSET_T4(\r)
105	lw $t5,EOFFSET_T5(\r)	105	lw $t5,EOFFSET_T5(\r)
106	lw $t6,EOFFSET_T6(\r)	106	lw $t6,EOFFSET_T6(\r)
107	lw $t7,EOFFSET_T7(\r)	107	lw $t7,EOFFSET_T7(\r)
108	lw $t8,EOFFSET_T8(\r)	108	lw $t8,EOFFSET_T8(\r)
109	lw $t9,EOFFSET_T9(\r)	109	lw $t9,EOFFSET_T9(\r)
110	lw $s0,EOFFSET_S0(\r)	110	lw $s0,EOFFSET_S0(\r)
111	lw $s1,EOFFSET_S1(\r)	111	lw $s1,EOFFSET_S1(\r)
112	lw $s2,EOFFSET_S2(\r)	112	lw $s2,EOFFSET_S2(\r)
113	lw $s3,EOFFSET_S3(\r)	113	lw $s3,EOFFSET_S3(\r)
114	lw $s4,EOFFSET_S4(\r)	114	lw $s4,EOFFSET_S4(\r)
115	lw $s5,EOFFSET_S5(\r)	115	lw $s5,EOFFSET_S5(\r)
116	lw $s6,EOFFSET_S6(\r)	116	lw $s6,EOFFSET_S6(\r)
117	lw $s7,EOFFSET_S7(\r)	117	lw $s7,EOFFSET_S7(\r)
118	lw $s8,EOFFSET_S8(\r)	118	lw $s8,EOFFSET_S8(\r)
119	lw $gp,EOFFSET_GP(\r)	119	lw $gp,EOFFSET_GP(\r)
120	lw $ra,EOFFSET_RA(\r)	120	lw $ra,EOFFSET_RA(\r)
121		121
122	lw $at,EOFFSET_LO(\r)	122	lw $at,EOFFSET_LO(\r)
123	mtlo $at	123	mtlo $at
124	lw $at,EOFFSET_HI(\r)	124	lw $at,EOFFSET_HI(\r)
125	mthi $at	125	mthi $at
126		126
127	lw $at,EOFFSET_STATUS(\r)	127	lw $at,EOFFSET_STATUS(\r)
128	mtc0 $at, $status	128	mtc0 $at, $status
129	lw $at,EOFFSET_EPC(\r)	129	lw $at,EOFFSET_EPC(\r)
130	mtc0 $at, $epc	130	mtc0 $at, $epc
131		131
132	lw $at,EOFFSET_AT(\r)	132	lw $at,EOFFSET_AT(\r)
133	lw $sp,EOFFSET_SP(\r)	133	lw $sp,EOFFSET_SP(\r)
134	.endm	134	.endm
135		135
136	# Move kernel stack pointer address to register K0	136	# Move kernel stack pointer address to register K0
137	# - if we are in user mode, load the appropriate stack	137	# - if we are in user mode, load the appropriate stack
138	# address	138	# address
139	.macro KERNEL_STACK_TO_K0	139	.macro KERNEL_STACK_TO_K0
140	# If we are in user mode	140	# If we are in user mode
141	mfc0 $k0, $status	141	mfc0 $k0, $status
142	andi $k0, 0x10	142	andi $k0, 0x10
143		143
144	beq $k0, $0, 1f	144	beq $k0, $0, 1f
145	add $k0, $sp, 0	145	add $k0, $sp, 0
146		146
147	# Move $k0 pointer to kernel stack	147	# Move $k0 pointer to kernel stack
148	lui $k0, %hi(supervisor_sp)	148	lui $k0, %hi(supervisor_sp)
149	ori $k0, $k0, %lo(supervisor_sp)	149	ori $k0, $k0, %lo(supervisor_sp)
150	# Move $k0 (superveisor_sp)	150	# Move $k0 (superveisor_sp)
151	lw $k0, 0($k0)	151	lw $k0, 0($k0)
152	1:	152	1:
153	.endm	153	.endm
154		154
155	.org 0x0	155	.org 0x0
156	tlb_refill_entry:	-
157	j tlb_refill_handler	-
158	nop	-
159		-
160	.org 0x100	-
161	cache_error_entry:	-
162	j cache_error_handler	-
163	nop	-
164		-
165	.org 0x180	-
166	norm_exception:	-
167	j exception_handler	-
168	nop	-
169		-
170	.org 0x200	-
171	iv_exception:	-
172	j exception_handler	-
173	nop	-
174		-
175	.org KA2PA(KERNEL_STARTUP_ADDRESS)	-
176	kernel_image_start:	156	kernel_image_start:
177	/* Load temporary stack */	157	/* Load temporary stack */
178	lui $sp, %hi(end_stack)	158	lui $sp, %hi(end_stack)
179	ori $sp, $sp, %lo(end_stack)	159	ori $sp, $sp, %lo(end_stack)
180		160
181	/* Not sure about this, but might be needed for PIC code???? */	161	/* Not sure about this, but might be needed for PIC code???? */
182	lui $gp, 0x8000	162	lui $gp, 0x8000
183		163
184	jal main_bsp	164	jal main_bsp
185	nop	165	nop
186		166
187		167
188	.space TEMP_STACK_SIZE	168	.space TEMP_STACK_SIZE
189	end_stack:	169	end_stack:
-		170
-		171	tlb_refill_entry:
-		172	j tlb_refill_handler
-		173	nop
-		174
-		175	cache_error_entry:
-		176	j cache_error_handler
-		177	nop
-		178
-		179	exception_entry:
-		180	j exception_handler
-		181	nop
-		182
-		183
190		184
191	exception_handler:	185	exception_handler:
192	exception_entry:	-
193	KERNEL_STACK_TO_K0	186	KERNEL_STACK_TO_K0
194	sub $k0, REGISTER_SPACE	187	sub $k0, REGISTER_SPACE
195	REGISTERS_STORE $k0	188	REGISTERS_STORE $k0
196	add $sp, $k0, 0	189	add $sp, $k0, 0
197		190
198	add $a0, $sp, 0	191	add $a0, $sp, 0
199	jal exception /* exception(register_space) */	192	jal exception /* exception(register_space) */
200	nop	193	nop
201		194
202	REGISTERS_LOAD $sp	195	REGISTERS_LOAD $sp
203	# The $sp is automatically restored to former value	196	# The $sp is automatically restored to former value
204	eret	197	eret
205	nop	198	nop
206		199
207	tlb_refill_handler:	200	tlb_refill_handler:
208	KERNEL_STACK_TO_K0	201	KERNEL_STACK_TO_K0
209	sub $k0, REGISTER_SPACE	202	sub $k0, REGISTER_SPACE
210	REGISTERS_STORE $k0	203	REGISTERS_STORE $k0
211	add $sp, $k0, 0	204	add $sp, $k0, 0
212		205
213	add $a0, $sp, 0	206	add $a0, $sp, 0
214	jal tlb_refill /* tlb_refill(register_space) */	207	jal tlb_refill /* tlb_refill(register_space) */
215	nop	208	nop
216		209
217	REGISTERS_LOAD $sp	210	REGISTERS_LOAD $sp
218		211
219	eret	212	eret
220	nop	213	nop
221		214
222	cache_error_handler:	215	cache_error_handler:
223	KERNEL_STACK_TO_K0	216	KERNEL_STACK_TO_K0
224	sub $sp, REGISTER_SPACE	217	sub $sp, REGISTER_SPACE
225	REGISTERS_STORE $sp	218	REGISTERS_STORE $sp
226	add $sp, $k0, 0	219	add $sp, $k0, 0
227		220
228	jal cache_error	221	jal cache_error
229	nop	222	nop
230		223
231	REGISTERS_LOAD $sp	224	REGISTERS_LOAD $sp
232		225
233	eret	226	eret
234	nop	227	nop
235		228
236	userspace_asm:	229	userspace_asm:
237	add $sp, $a0, 0	230	add $sp, $a0, 0
238	eret	231	eret
239	nop	232	nop
240		233
241		234

Subversion Repositories HelenOS-historic

(root)/SPARTAN/trunk/arch/mips/src/start.S – Rev 320 → 326