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>
#include <arch/mm/page.h>
#include <arch/mm/asid.h>
#include <mm/asid.h>
 
#define RR_MASK (0xFFFFFFFF00000002)
#define RID_SHIFT 8
#define PS_SHIFT 2
 
#define KERNEL_TRANSLATION_I 0x0010000000000661
#define KERNEL_TRANSLATION_D 0x0010000000000661
 
.section K_TEXT_START, "ax"
 
.global kernel_image_start
 
stack0:
kernel_image_start:
	.auto
 
	# Fill TR.i and TR.d using Region Register #VRN_KERNEL
 
	movl r8 = (VRN_KERNEL << VRN_SHIFT)
	mov r9 = rr[r8]
	movl r10 = (RR_MASK)
	and r9 = r10, r9
	movl r10 = ((RID_KERNEL << RID_SHIFT) | (KERNEL_PAGE_WIDTH << PS_SHIFT))
	or  r9 = r10, r9
	mov rr[r8] = r9
 
	movl r8 = (VRN_KERNEL << VRN_SHIFT)
	mov cr.ifa = r8
	movl r10 = (KERNEL_PAGE_WIDTH << PS_SHIFT)
	mov cr.itir = r10
	movl r10 = (KERNEL_TRANSLATION_I)
	itr.i itr[r0] = r10
	movl r10 = (KERNEL_TRANSLATION_D)
	itr.d dtr[r0] = r10
 
	# initialize PSR
	mov psr.l = r0
	srlz.i
	srlz.d
	movl r10 = (PSR_DT_MASK | PSR_RT_MASK | PSR_IT_MASK | PSR_IC_MASK)  /* Enable paging */
	mov r9 = psr
	or r10 = r10, r9
	mov cr.ipsr = r10
	mov cr.ifs = r0
	movl r8 = paging_start
	mov cr.iip = r8
	srlz.d
	srlz.i
 
	.explicit
	/*
	 * Return From Interupt is the only the way to fill upper half word of PSR.
	 */
	rfi;;
 
.global paging_start
paging_start:
 
	/*
	 * Now we are paging.
	 */
 
	# switch to register bank 1
	bsw.1
	
	# initialize register stack
	mov ar.rsc = r0
	movl r8 = (VRN_KERNEL << VRN_SHIFT) ;;
	mov ar.bspstore = r8
	loadrs
 
	# 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 r20 = (VRN_KERNEL << VRN_SHIFT);;
	or r20 = r20,r1;;
	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
	addl r21 = @gprel(bootinfo), gp
	;;
	st8 [r17] = r14
	st8 [r18] = r15
	st8 [r19] = r16
	st8 [r21] = r20
 
	ssm (1 << 19) ;; /* Disable f32 - f127 */
	srlz.i
	srlz.d ;;
 
	br.call.sptk.many b0 = arch_pre_main
 
	movl r18 = main_bsp ;;
	mov b1 = r18 ;;
	br.call.sptk.many b0 = b1
 
 
0:
	br 0b
 

Rev 2512	Rev 2519
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>	29	#include <arch/register.h>
30	#include <arch/mm/page.h>	30	#include <arch/mm/page.h>
31	#include <arch/mm/asid.h>	31	#include <arch/mm/asid.h>
32	#include <mm/asid.h>	32	#include <mm/asid.h>
33		33
34	#define RR_MASK (0xFFFFFFFF00000002)	34	#define RR_MASK (0xFFFFFFFF00000002)
35	#define RID_SHIFT 8	35	#define RID_SHIFT 8
36	#define PS_SHIFT 2	36	#define PS_SHIFT 2
37		37
38	#define KERNEL_TRANSLATION_I 0x0010000000000661	38	#define KERNEL_TRANSLATION_I 0x0010000000000661
39	#define KERNEL_TRANSLATION_D 0x0010000000000661	39	#define KERNEL_TRANSLATION_D 0x0010000000000661
40		40
41	.section K_TEXT_START, "ax"	41	.section K_TEXT_START, "ax"
42		42
43	.global kernel_image_start	43	.global kernel_image_start
44		44
45	stack0:	45	stack0:
46	kernel_image_start:	46	kernel_image_start:
47	.auto	47	.auto
48		48
49	# Fill TR.i and TR.d using Region Register #VRN_KERNEL	49	# Fill TR.i and TR.d using Region Register #VRN_KERNEL
50		50
51	movl r8 = (VRN_KERNEL << VRN_SHIFT)	51	movl r8 = (VRN_KERNEL << VRN_SHIFT)
52	mov r9 = rr[r8]	52	mov r9 = rr[r8]
53	movl r10 = (RR_MASK)	53	movl r10 = (RR_MASK)
54	and r9 = r10, r9	54	and r9 = r10, r9
55	movl r10 = ((RID_KERNEL << RID_SHIFT) \| (KERNEL_PAGE_WIDTH << PS_SHIFT))	55	movl r10 = ((RID_KERNEL << RID_SHIFT) \| (KERNEL_PAGE_WIDTH << PS_SHIFT))
56	or r9 = r10, r9	56	or r9 = r10, r9
57	mov rr[r8] = r9	57	mov rr[r8] = r9
58		58
59	movl r8 = (VRN_KERNEL << VRN_SHIFT)	59	movl r8 = (VRN_KERNEL << VRN_SHIFT)
60	mov cr.ifa = r8	60	mov cr.ifa = r8
61	movl r10 = (KERNEL_PAGE_WIDTH << PS_SHIFT)	61	movl r10 = (KERNEL_PAGE_WIDTH << PS_SHIFT)
62	mov cr.itir = r10	62	mov cr.itir = r10
63	movl r10 = (KERNEL_TRANSLATION_I)	63	movl r10 = (KERNEL_TRANSLATION_I)
64	itr.i itr[r0] = r10	64	itr.i itr[r0] = r10
65	movl r10 = (KERNEL_TRANSLATION_D)	65	movl r10 = (KERNEL_TRANSLATION_D)
66	itr.d dtr[r0] = r10	66	itr.d dtr[r0] = r10
67		67
68	# initialize PSR	68	# initialize PSR
69	mov psr.l = r0	69	mov psr.l = r0
70	srlz.i	70	srlz.i
71	srlz.d	71	srlz.d
72	movl r10 = (PSR_DT_MASK \| PSR_RT_MASK \| PSR_IT_MASK \| PSR_IC_MASK) /* Enable paging */	72	movl r10 = (PSR_DT_MASK \| PSR_RT_MASK \| PSR_IT_MASK \| PSR_IC_MASK) /* Enable paging */
73	mov r9 = psr	73	mov r9 = psr
74	or r10 = r10, r9	74	or r10 = r10, r9
75	mov cr.ipsr = r10	75	mov cr.ipsr = r10
76	mov cr.ifs = r0	76	mov cr.ifs = r0
77	movl r8 = paging_start	77	movl r8 = paging_start
78	mov cr.iip = r8	78	mov cr.iip = r8
79	srlz.d	79	srlz.d
80	srlz.i	80	srlz.i
81		81
82	.explicit	82	.explicit
83	/*	83	/*
84	* Return From Interupt is the only the way to fill upper half word of PSR.	84	* Return From Interupt is the only the way to fill upper half word of PSR.
85	*/	85	*/
86	rfi;;	86	rfi;;
87		87
88	.global paging_start	88	.global paging_start
89	paging_start:	89	paging_start:
90		90
91	/*	91	/*
92	* Now we are paging.	92	* Now we are paging.
93	*/	93	*/
94		94
95	# switch to register bank 1	95	# switch to register bank 1
96	bsw.1	96	bsw.1
97		97
98	# initialize register stack	98	# initialize register stack
99	mov ar.rsc = r0	99	mov ar.rsc = r0
100	movl r8 = (VRN_KERNEL << VRN_SHIFT) ;;	100	movl r8 = (VRN_KERNEL << VRN_SHIFT) ;;
101	mov ar.bspstore = r8	101	mov ar.bspstore = r8
102	loadrs	102	loadrs
103		103
104	# initialize memory stack to some sane value	104	# initialize memory stack to some sane value
105	movl r12 = stack0 ;;	105	movl r12 = stack0 ;;
106		106
107	add r12 = -16, r12 /* allocate a scratch area on the stack */	107	add r12 = -16, r12 /* allocate a scratch area on the stack */
108		108
109	# initialize gp (Global Pointer) register	109	# initialize gp (Global Pointer) register
-		110	movl r20 = (VRN_KERNEL << VRN_SHIFT);;
110	mov r20 = r1 ;;	111	or r20 = r20,r1;;
111	movl r1 = _hardcoded_load_address	112	movl r1 = _hardcoded_load_address
112		113
113	/*	114	/*
114	* Initialize hardcoded_* variables.	115	* Initialize hardcoded_* variables.
115	*/	116	*/
116	movl r14 = _hardcoded_ktext_size	117	movl r14 = _hardcoded_ktext_size
117	movl r15 = _hardcoded_kdata_size	118	movl r15 = _hardcoded_kdata_size
118	movl r16 = _hardcoded_load_address ;;	119	movl r16 = _hardcoded_load_address ;;
119	addl r17 = @gprel(hardcoded_ktext_size), gp	120	addl r17 = @gprel(hardcoded_ktext_size), gp
120	addl r18 = @gprel(hardcoded_kdata_size), gp	121	addl r18 = @gprel(hardcoded_kdata_size), gp
121	addl r19 = @gprel(hardcoded_load_address), gp	122	addl r19 = @gprel(hardcoded_load_address), gp
122	addl r21 = @gprel(bootinfo), gp	123	addl r21 = @gprel(bootinfo), gp
123	;;	124	;;
124	st8 [r17] = r14	125	st8 [r17] = r14
125	st8 [r18] = r15	126	st8 [r18] = r15
126	st8 [r19] = r16	127	st8 [r19] = r16
127	st8 [r21] = r20	128	st8 [r21] = r20
128		129
129	ssm (1 << 19) ;; / Disable f32 - f127 /	130	ssm (1 << 19) ;; / Disable f32 - f127 /
130	srlz.i	131	srlz.i
131	srlz.d ;;	132	srlz.d ;;
132		133
133	br.call.sptk.many b0 = arch_pre_main	134	br.call.sptk.many b0 = arch_pre_main
134		135
135	movl r18 = main_bsp ;;	136	movl r18 = main_bsp ;;
136	mov b1 = r18 ;;	137	mov b1 = r18 ;;
137	br.call.sptk.many b0 = b1	138	br.call.sptk.many b0 = b1
138		139
139		140
140	0:	141	0:
141	br 0b	142	br 0b
142		143

Subversion Repositories HelenOS

(root)/trunk/kernel/arch/ia64/src/start.S – Rev 2512 → 2519