WebSVN – HelenOS – Diff – /trunk/kernel/arch/mips32/src/context.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.
#
 
#include <arch/asm/regname.h>
#include <arch/context_offset.h>
	
.text   
 
.set noat
.set noreorder
.set nomacro
 
.global context_save_arch
.global context_restore_arch
 
.macro CONTEXT_STORE r
	sw $s0,OFFSET_S0(\r)
	sw $s1,OFFSET_S1(\r)
	sw $s2,OFFSET_S2(\r)
	sw $s3,OFFSET_S3(\r)
	sw $s4,OFFSET_S4(\r)
	sw $s5,OFFSET_S5(\r)
	sw $s6,OFFSET_S6(\r)
	sw $s7,OFFSET_S7(\r)
	sw $s8,OFFSET_S8(\r)
	sw $gp,OFFSET_GP(\r)
	
	sw $ra,OFFSET_PC(\r)
	sw $sp,OFFSET_SP(\r)
.endm
 
.macro CONTEXT_LOAD r
	lw $s0,OFFSET_S0(\r)
	lw $s1,OFFSET_S1(\r)
	lw $s2,OFFSET_S2(\r)
	lw $s3,OFFSET_S3(\r)
	lw $s4,OFFSET_S4(\r)
	lw $s5,OFFSET_S5(\r)
	lw $s6,OFFSET_S6(\r)
	lw $s7,OFFSET_S7(\r)
	lw $s8,OFFSET_S8(\r)
	lw $gp,OFFSET_GP(\r)
	
	lw $ra,OFFSET_PC(\r)
	lw $sp,OFFSET_SP(\r)
.endm
 
	
context_save_arch:
	CONTEXT_STORE $a0
 
	# context_save returns 1
	j $31
	li $2, 1	
	
context_restore_arch:
	CONTEXT_LOAD $a0
 
	# context_restore returns 0
	j $31
	xor $2, $2	
 

Rev 1787	Rev 2071
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	#include <arch/asm/regname.h>	29	#include <arch/asm/regname.h>
30	#include <arch/context_offset.h>	30	#include <arch/context_offset.h>
31		31
32	.text	32	.text
33		33
34	.set noat	34	.set noat
35	.set noreorder	35	.set noreorder
36	.set nomacro	36	.set nomacro
37		37
38	.global context_save_arch	38	.global context_save_arch
39	.global context_restore_arch	39	.global context_restore_arch
40		40
41	.macro CONTEXT_STORE r	41	.macro CONTEXT_STORE r
42	sw $s0,OFFSET_S0(\r)	42	sw $s0,OFFSET_S0(\r)
43	sw $s1,OFFSET_S1(\r)	43	sw $s1,OFFSET_S1(\r)
44	sw $s2,OFFSET_S2(\r)	44	sw $s2,OFFSET_S2(\r)
45	sw $s3,OFFSET_S3(\r)	45	sw $s3,OFFSET_S3(\r)
46	sw $s4,OFFSET_S4(\r)	46	sw $s4,OFFSET_S4(\r)
47	sw $s5,OFFSET_S5(\r)	47	sw $s5,OFFSET_S5(\r)
48	sw $s6,OFFSET_S6(\r)	48	sw $s6,OFFSET_S6(\r)
49	sw $s7,OFFSET_S7(\r)	49	sw $s7,OFFSET_S7(\r)
50	sw $s8,OFFSET_S8(\r)	50	sw $s8,OFFSET_S8(\r)
51	sw $gp,OFFSET_GP(\r)	51	sw $gp,OFFSET_GP(\r)
52		52
53	sw $ra,OFFSET_PC(\r)	53	sw $ra,OFFSET_PC(\r)
54	sw $sp,OFFSET_SP(\r)	54	sw $sp,OFFSET_SP(\r)
55	.endm	55	.endm
56		56
57	.macro CONTEXT_LOAD r	57	.macro CONTEXT_LOAD r
58	lw $s0,OFFSET_S0(\r)	58	lw $s0,OFFSET_S0(\r)
59	lw $s1,OFFSET_S1(\r)	59	lw $s1,OFFSET_S1(\r)
60	lw $s2,OFFSET_S2(\r)	60	lw $s2,OFFSET_S2(\r)
61	lw $s3,OFFSET_S3(\r)	61	lw $s3,OFFSET_S3(\r)
62	lw $s4,OFFSET_S4(\r)	62	lw $s4,OFFSET_S4(\r)
63	lw $s5,OFFSET_S5(\r)	63	lw $s5,OFFSET_S5(\r)
64	lw $s6,OFFSET_S6(\r)	64	lw $s6,OFFSET_S6(\r)
65	lw $s7,OFFSET_S7(\r)	65	lw $s7,OFFSET_S7(\r)
66	lw $s8,OFFSET_S8(\r)	66	lw $s8,OFFSET_S8(\r)
67	lw $gp,OFFSET_GP(\r)	67	lw $gp,OFFSET_GP(\r)
68		68
69	lw $ra,OFFSET_PC(\r)	69	lw $ra,OFFSET_PC(\r)
70	lw $sp,OFFSET_SP(\r)	70	lw $sp,OFFSET_SP(\r)
71	.endm	71	.endm
72		72
73		73
74	context_save_arch:	74	context_save_arch:
75	CONTEXT_STORE $a0	75	CONTEXT_STORE $a0
76		76
77	# context_save returns 1	77	# context_save returns 1
78	j $31	78	j $31
79	li $2, 1	79	li $2, 1
80		80
81	context_restore_arch:	81	context_restore_arch:
82	CONTEXT_LOAD $a0	82	CONTEXT_LOAD $a0
83		83
84	# context_restore returns 0	84	# context_restore returns 0
85	j $31	85	j $31
86	xor $2, $2	86	xor $2, $2
87		87

Subversion Repositories HelenOS

(root)/trunk/kernel/arch/mips32/src/context.S – Rev 1787 → 2071