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.
#
 
.section K_TEXT_START
.global k_text_start
k_text_start:
 
.global kernel_image_start
 
stack0:
kernel_image_start:
	.auto
	# initialize PSR
	mov psr.l = r0
	
	# 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=k_text_start
 
	#
	# Initialize hardcoded_* variables.
	# (IA-64 port doesn't get these values from linker.)
	#
	movl r8 = k_text_start	;;
	movl r9 = k_text_end	;;
	sub r8 = r9, r8		
	addl r10 = @gprel(hardcoded_ktext_size), gp;;
	st4 [r10] = r8		;;
 
	movl r8 = k_data_start	;;
	movl r9 = k_data_end	;;
	sub r8 = r9, r8		
	addl r10 = @gprel(hardcoded_kdata_size), gp;;
	st4 [r10] = r8		;;
	
	addl r10 = @gprel(hardcoded_load_address), gp;;
	st8 [r10] = r1
	
	br.call.sptk.many b0=main_bsp
 
0:
	br 0b
 
.section K_TEXT_END
.global k_text_end
k_text_end:
 
.section K_DATA_START
.global k_data_start
k_data_start:
 
.section K_DATA_END
.global k_data_end
k_data_end:
 

Rev 81	Rev 102
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	.section K_TEXT_START	29	.section K_TEXT_START
30	.global k_text_start	30	.global k_text_start
31	k_text_start:	31	k_text_start:
32		32
33	.global kernel_image_start	33	.global kernel_image_start
34		34
35	stack0:	35	stack0:
36	kernel_image_start:	36	kernel_image_start:
37	.auto	37	.auto
38	# initialize PSR	38	# initialize PSR
39	mov psr.l = r0	39	mov psr.l = r0
40		40
41	# initialize register stack	41	# initialize register stack
42	mov ar.rsc = r0	42	mov ar.rsc = r0
-		43	mov ar.bspstore = r0
43	loadrs	44	loadrs
44		45
45	.explicit	46	.explicit
46	# initialize memory stack to some sane value	47	# initialize memory stack to some sane value
47	movl r12 = stack0 ;;	48	movl r12 = stack0 ;;
48	add r12 = - 16, r12 /* allocate a scratch area on the stack */	49	add r12 = - 16, r12 /* allocate a scratch area on the stack */
49		50
50	# initialize gp (Global Pointer) register	51	# initialize gp (Global Pointer) register
51	movl r1=k_text_start	52	movl r1=k_text_start
52		53
53	#	54	#
54	# Initialize hardcoded_* variables.	55	# Initialize hardcoded_* variables.
55	# (IA-64 port doesn't get these values from linker.)	56	# (IA-64 port doesn't get these values from linker.)
56	#	57	#
57	movl r8 = k_text_start ;;	58	movl r8 = k_text_start ;;
58	movl r9 = k_text_end ;;	59	movl r9 = k_text_end ;;
59	sub r8 = r9, r8	60	sub r8 = r9, r8
60	addl r10 = @gprel(hardcoded_ktext_size), gp;;	61	addl r10 = @gprel(hardcoded_ktext_size), gp;;
61	st4 [r10] = r8 ;;	62	st4 [r10] = r8 ;;
62		63
63	movl r8 = k_data_start ;;	64	movl r8 = k_data_start ;;
64	movl r9 = k_data_end ;;	65	movl r9 = k_data_end ;;
65	sub r8 = r9, r8	66	sub r8 = r9, r8
66	addl r10 = @gprel(hardcoded_kdata_size), gp;;	67	addl r10 = @gprel(hardcoded_kdata_size), gp;;
67	st4 [r10] = r8 ;;	68	st4 [r10] = r8 ;;
68		69
69	addl r10 = @gprel(hardcoded_load_address), gp;;	70	addl r10 = @gprel(hardcoded_load_address), gp;;
70	st8 [r10] = r1	71	st8 [r10] = r1
71		72
72	br.call.sptk.many b0=main_bsp	73	br.call.sptk.many b0=main_bsp
73		74
74	0:	75	0:
75	br 0b	76	br 0b
76		77
77	.section K_TEXT_END	78	.section K_TEXT_END
78	.global k_text_end	79	.global k_text_end
79	k_text_end:	80	k_text_end:
80		81
81	.section K_DATA_START	82	.section K_DATA_START
82	.global k_data_start	83	.global k_data_start
83	k_data_start:	84	k_data_start:
84		85
85	.section K_DATA_END	86	.section K_DATA_END
86	.global k_data_end	87	.global k_data_end
87	k_data_end:	88	k_data_end:
88		89

Subversion Repositories HelenOS

(root)/trunk/kernel/arch/ia64/src/start.S @ 3321 – Rev 81 → 102