WebSVN – HelenOS – Diff – /trunk/kernel/arch/ia64/src/start.S


#
# Copyright (C) 2005 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/register.h>
 
.section K_TEXT_START
 
.global kernel_image_start
 
stack0:
kernel_image_start:
	.auto
 
	# initialize PSR
	mov psr.l = r0
	srlz.i
	srlz.d
	ssm PSR_IC_MASK
	srlz.d
	
	# switch to register bank 1
	bsw.1
	
	# initialize register stack
	mov ar.rsc = r0
	mov ar.bspstore = r0
	loadrs
 
	.explicit
	# initialize memory stack to some sane value
	movl r12 = stack0	;;
	add r12 = - 16, r12	/* allocate a scratch area on the stack */
 
	# initialize gp (Global Pointer) register
	movl r1 = _hardcoded_load_address
	
	;;
 
	#
	# Initialize hardcoded_* variables.
	#
	movl r14 = _hardcoded_ktext_size
	movl r15 = _hardcoded_kdata_size
	movl r16 = _hardcoded_load_address
	addl r17 = @gprel(hardcoded_ktext_size), gp
	addl r18 = @gprel(hardcoded_kdata_size), gp
	addl r19 = @gprel(hardcoded_load_address), gp
	;;
	st4 [r17] = r14
	st4 [r18] = r15
	st8 [r19] = r16
	
	br.call.sptk.many b0=main_bsp
 
0:
	br 0b
 

Rev 412	Rev 473
1	#	1	#
2	# Copyright (C) 2005 Jakub Jermar	2	# Copyright (C) 2005 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/register.h>
-		30
29	.section K_TEXT_START	31	.section K_TEXT_START
30		32
31	.global kernel_image_start	33	.global kernel_image_start
32		34
33	stack0:	35	stack0:
34	kernel_image_start:	36	kernel_image_start:
35	.auto	37	.auto
36		38
37	# initialize PSR	39	# initialize PSR
38	mov psr.l = r0	40	mov psr.l = r0
39	srlz.i	41	srlz.i
40	srlz.d	42	srlz.d
-		43	ssm PSR_IC_MASK
-		44	srlz.d
-		45
-		46	# switch to register bank 1
-		47	bsw.1
41		48
42	# initialize register stack	49	# initialize register stack
43	mov ar.rsc = r0	50	mov ar.rsc = r0
44	mov ar.bspstore = r0	51	mov ar.bspstore = r0
45	loadrs	52	loadrs
46		53
47	.explicit	54	.explicit
48	# initialize memory stack to some sane value	55	# initialize memory stack to some sane value
49	movl r12 = stack0 ;;	56	movl r12 = stack0 ;;
50	add r12 = - 16, r12 /* allocate a scratch area on the stack */	57	add r12 = - 16, r12 /* allocate a scratch area on the stack */
51		58
52	# initialize gp (Global Pointer) register	59	# initialize gp (Global Pointer) register
53	movl r1 = _hardcoded_load_address	60	movl r1 = _hardcoded_load_address
54		61
55	;;	62	;;
56		63
57	#	64	#
58	# Initialize hardcoded_* variables.	65	# Initialize hardcoded_* variables.
59	#	66	#
60	movl r14 = _hardcoded_ktext_size	67	movl r14 = _hardcoded_ktext_size
61	movl r15 = _hardcoded_kdata_size	68	movl r15 = _hardcoded_kdata_size
62	movl r16 = _hardcoded_load_address	69	movl r16 = _hardcoded_load_address
63	addl r17 = @gprel(hardcoded_ktext_size), gp	70	addl r17 = @gprel(hardcoded_ktext_size), gp
64	addl r18 = @gprel(hardcoded_kdata_size), gp	71	addl r18 = @gprel(hardcoded_kdata_size), gp
65	addl r19 = @gprel(hardcoded_load_address), gp	72	addl r19 = @gprel(hardcoded_load_address), gp
66	;;	73	;;
67	st4 [r17] = r14	74	st4 [r17] = r14
68	st4 [r18] = r15	75	st4 [r18] = r15
69	st8 [r19] = r16	76	st8 [r19] = r16
70		77
71	br.call.sptk.many b0=main_bsp	78	br.call.sptk.many b0=main_bsp
72		79
73	0:	80	0:
74	br 0b	81	br 0b
75		82

Subversion Repositories HelenOS

(root)/trunk/kernel/arch/ia64/src/start.S @ 2071 – Rev 412 → 473