WebSVN – HelenOS – Diff – /trunk/kernel/arch/ppc32/src/context.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>
#include <arch/context_offset.h>
 
.text   
 
.global context_save_arch
.global context_restore_arch
 
.macro CONTEXT_STORE r
	stw sp, OFFSET_SP(\r)
	stw r2, OFFSET_R2(\r)
	stw r13, OFFSET_R13(\r)
	stw r14, OFFSET_R14(\r)
	stw r15, OFFSET_R15(\r)
	stw r16, OFFSET_R16(\r)
	stw r17, OFFSET_R17(\r)
	stw r18, OFFSET_R18(\r)
	stw r19, OFFSET_R19(\r)
	stw r20, OFFSET_R20(\r)
	stw r21, OFFSET_R21(\r)
	stw r22, OFFSET_R22(\r)
	stw r23, OFFSET_R23(\r)
	stw r24, OFFSET_R24(\r)
	stw r25, OFFSET_R25(\r)
	stw r26, OFFSET_R26(\r)
	stw r27, OFFSET_R27(\r)
	stw r28, OFFSET_R28(\r)
	stw r29, OFFSET_R29(\r)
	stw r30, OFFSET_R30(\r)
	stw r31, OFFSET_R31(\r)
.endm
 
.macro CONTEXT_LOAD r
	lwz sp, OFFSET_SP(\r)
	lwz r2, OFFSET_R2(\r)
	lwz r13, OFFSET_R13(\r)
	lwz r14, OFFSET_R14(\r)
	lwz r15, OFFSET_R15(\r)
	lwz r16, OFFSET_R16(\r)
	lwz r17, OFFSET_R17(\r)
	lwz r18, OFFSET_R18(\r)
	lwz r19, OFFSET_R19(\r)
	lwz r20, OFFSET_R20(\r)
	lwz r21, OFFSET_R21(\r)
	lwz r22, OFFSET_R22(\r)
	lwz r23, OFFSET_R23(\r)
	lwz r24, OFFSET_R24(\r)
	lwz r25, OFFSET_R25(\r)
	lwz r26, OFFSET_R26(\r)
	lwz r27, OFFSET_R27(\r)
	lwz r28, OFFSET_R28(\r)
	lwz r29, OFFSET_R29(\r)
	lwz r30, OFFSET_R30(\r)
	lwz r31, OFFSET_R31(\r)
.endm
 
context_save_arch:
	CONTEXT_STORE r3
	
	mflr r4
	stw r4, OFFSET_PC(r3)
	
	mfcr r4
	stw r4, OFFSET_CR(r3)
	
	# context_save returns 1
	li r3, 1
	blr
	
context_restore_arch:
	CONTEXT_LOAD r3
	
	lwz r4, OFFSET_CR(r3)
	mtcr r4
	
	lwz r4, OFFSET_PC(r3)
	mtlr r4
	
	# context_restore returns 0
	li r3, 0
	blr
 

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	#include <arch/context_offset.h>	30	#include <arch/context_offset.h>
31		31
32	.text	32	.text
33		33
34	.global context_save_arch	34	.global context_save_arch
35	.global context_restore_arch	35	.global context_restore_arch
36		36
37	.macro CONTEXT_STORE r	37	.macro CONTEXT_STORE r
38	stw sp, OFFSET_SP(\r)	38	stw sp, OFFSET_SP(\r)
39	stw r2, OFFSET_R2(\r)	39	stw r2, OFFSET_R2(\r)
40	stw r13, OFFSET_R13(\r)	40	stw r13, OFFSET_R13(\r)
41	stw r14, OFFSET_R14(\r)	41	stw r14, OFFSET_R14(\r)
42	stw r15, OFFSET_R15(\r)	42	stw r15, OFFSET_R15(\r)
43	stw r16, OFFSET_R16(\r)	43	stw r16, OFFSET_R16(\r)
44	stw r17, OFFSET_R17(\r)	44	stw r17, OFFSET_R17(\r)
45	stw r18, OFFSET_R18(\r)	45	stw r18, OFFSET_R18(\r)
46	stw r19, OFFSET_R19(\r)	46	stw r19, OFFSET_R19(\r)
47	stw r20, OFFSET_R20(\r)	47	stw r20, OFFSET_R20(\r)
48	stw r21, OFFSET_R21(\r)	48	stw r21, OFFSET_R21(\r)
49	stw r22, OFFSET_R22(\r)	49	stw r22, OFFSET_R22(\r)
50	stw r23, OFFSET_R23(\r)	50	stw r23, OFFSET_R23(\r)
51	stw r24, OFFSET_R24(\r)	51	stw r24, OFFSET_R24(\r)
52	stw r25, OFFSET_R25(\r)	52	stw r25, OFFSET_R25(\r)
53	stw r26, OFFSET_R26(\r)	53	stw r26, OFFSET_R26(\r)
54	stw r27, OFFSET_R27(\r)	54	stw r27, OFFSET_R27(\r)
55	stw r28, OFFSET_R28(\r)	55	stw r28, OFFSET_R28(\r)
56	stw r29, OFFSET_R29(\r)	56	stw r29, OFFSET_R29(\r)
57	stw r30, OFFSET_R30(\r)	57	stw r30, OFFSET_R30(\r)
58	stw r31, OFFSET_R31(\r)	58	stw r31, OFFSET_R31(\r)
59	.endm	59	.endm
60		60
61	.macro CONTEXT_LOAD r	61	.macro CONTEXT_LOAD r
62	lwz sp, OFFSET_SP(\r)	62	lwz sp, OFFSET_SP(\r)
63	lwz r2, OFFSET_R2(\r)	63	lwz r2, OFFSET_R2(\r)
64	lwz r13, OFFSET_R13(\r)	64	lwz r13, OFFSET_R13(\r)
65	lwz r14, OFFSET_R14(\r)	65	lwz r14, OFFSET_R14(\r)
66	lwz r15, OFFSET_R15(\r)	66	lwz r15, OFFSET_R15(\r)
67	lwz r16, OFFSET_R16(\r)	67	lwz r16, OFFSET_R16(\r)
68	lwz r17, OFFSET_R17(\r)	68	lwz r17, OFFSET_R17(\r)
69	lwz r18, OFFSET_R18(\r)	69	lwz r18, OFFSET_R18(\r)
70	lwz r19, OFFSET_R19(\r)	70	lwz r19, OFFSET_R19(\r)
71	lwz r20, OFFSET_R20(\r)	71	lwz r20, OFFSET_R20(\r)
72	lwz r21, OFFSET_R21(\r)	72	lwz r21, OFFSET_R21(\r)
73	lwz r22, OFFSET_R22(\r)	73	lwz r22, OFFSET_R22(\r)
74	lwz r23, OFFSET_R23(\r)	74	lwz r23, OFFSET_R23(\r)
75	lwz r24, OFFSET_R24(\r)	75	lwz r24, OFFSET_R24(\r)
76	lwz r25, OFFSET_R25(\r)	76	lwz r25, OFFSET_R25(\r)
77	lwz r26, OFFSET_R26(\r)	77	lwz r26, OFFSET_R26(\r)
78	lwz r27, OFFSET_R27(\r)	78	lwz r27, OFFSET_R27(\r)
79	lwz r28, OFFSET_R28(\r)	79	lwz r28, OFFSET_R28(\r)
80	lwz r29, OFFSET_R29(\r)	80	lwz r29, OFFSET_R29(\r)
81	lwz r30, OFFSET_R30(\r)	81	lwz r30, OFFSET_R30(\r)
82	lwz r31, OFFSET_R31(\r)	82	lwz r31, OFFSET_R31(\r)
83	.endm	83	.endm
84		84
85	context_save_arch:	85	context_save_arch:
86	CONTEXT_STORE r3	86	CONTEXT_STORE r3
87		87
88	mflr r4	88	mflr r4
89	stw r4, OFFSET_PC(r3)	89	stw r4, OFFSET_PC(r3)
90		90
91	mfcr r4	91	mfcr r4
92	stw r4, OFFSET_CR(r3)	92	stw r4, OFFSET_CR(r3)
93		93
94	# context_save returns 1	94	# context_save returns 1
95	li r3, 1	95	li r3, 1
96	blr	96	blr
97		97
98	context_restore_arch:	98	context_restore_arch:
99	CONTEXT_LOAD r3	99	CONTEXT_LOAD r3
100		100
101	lwz r4, OFFSET_CR(r3)	101	lwz r4, OFFSET_CR(r3)
102	mtcr r4	102	mtcr r4
103		103
104	lwz r4, OFFSET_PC(r3)	104	lwz r4, OFFSET_PC(r3)
105	mtlr r4	105	mtlr r4
106		106
107	# context_restore returns 0	107	# context_restore returns 0
108	li r3, 0	108	li r3, 0
109	blr	109	blr
110		110

Subversion Repositories HelenOS

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