Subversion Repositories HelenOS-historic

Rev

Rev 919 | Rev 993 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
35 jermar 1
#
2
# Copyright (C) 2005 Jakub Jermar
3
# All rights reserved.
4
#
5
# Redistribution and use in source and binary forms, with or without
6
# modification, are permitted provided that the following conditions
7
# are met:
8
#
9
# - Redistributions of source code must retain the above copyright
10
#   notice, this list of conditions and the following disclaimer.
11
# - Redistributions in binary form must reproduce the above copyright
12
#   notice, this list of conditions and the following disclaimer in the
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
15
#   derived from this software without specific prior written permission.
16
#
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
19
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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
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
26
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
#
28
 
473 jermar 29
#include <arch/register.h>
869 vana 30
#include <arch/mm/page.h>
31
#include <arch/mm/asid.h>
32
#include <mm/asid.h>
473 jermar 33
 
869 vana 34
#define RR_MASK (0xFFFFFFFF00000002)
35
#define RID_SHIFT 8
36
#define PS_SHIFT 2
37
 
38
#define KERNEL_TRANSLATION_I 0x0010000000000661
39
#define KERNEL_TRANSLATION_D 0x0010000000000661
40
 
923 vana 41
.section K_TEXT_START, "ax"
60 jermar 42
 
35 jermar 43
.global kernel_image_start
44
 
37 jermar 45
stack0:
35 jermar 46
kernel_image_start:
81 jermar 47
	.auto
412 jermar 48
 
893 jermar 49
	# Fill TR.i and TR.d using Region Register #VRN_KERNEL
869 vana 50
 
51
	movl r8=(VRN_KERNEL<<VRN_SHIFT)
52
	mov r9=rr[r8]
53
	movl r10=(RR_MASK)
54
	and r9=r10,r9
901 jermar 55
	movl r10=((RID_KERNEL<<RID_SHIFT)|(KERNEL_PAGE_WIDTH<<PS_SHIFT))
869 vana 56
	or  r9=r10,r9
57
	mov rr[r8]=r9
58
 
59
	movl r8=(VRN_KERNEL<<VRN_SHIFT)
60
	mov cr.ifa=r8
61
	movl r10=(KERNEL_PAGE_WIDTH<<PS_SHIFT)
62
	mov cr.itir=r10
63
	movl r10=(KERNEL_TRANSLATION_I)
64
	itr.i itr[r0]=r10
65
	movl r10=(KERNEL_TRANSLATION_D)
66
	itr.d dtr[r0]=r10
67
 
81 jermar 68
	# initialize PSR
412 jermar 69
	mov psr.l = r0
70
	srlz.i
71
	srlz.d
893 jermar 72
	movl r10=(PSR_DT_MASK|PSR_RT_MASK|PSR_IT_MASK|PSR_IC_MASK)  /* Enable paging */
869 vana 73
	mov r9=psr
74
	or r10=r10,r9
75
	mov cr.ipsr=r10
76
	mov cr.ifs=r0
77
	movl r8=paging_start
78
	mov cr.iip=r8
473 jermar 79
	srlz.d
869 vana 80
	srlz.i
879 vana 81
 
893 jermar 82
	.explicit
83
	/*
84
	 * Return From Interupt is the only the way to fill upper half word of PSR.
85
	 */
86
	rfi;;
879 vana 87
 
88
.global paging_start
89
paging_start:
893 jermar 90
 
91
	/*
92
	 * Now we are paging.
93
	 */
94
 
869 vana 95
 
473 jermar 96
	# switch to register bank 1
97
	bsw.1
98
 
74 jermar 99
	# initialize register stack
81 jermar 100
	mov ar.rsc = r0
893 jermar 101
	movl r8=(VRN_KERNEL<<VRN_SHIFT) ;;
869 vana 102
	mov ar.bspstore = r8
81 jermar 103
	loadrs
36 jermar 104
 
74 jermar 105
	# initialize memory stack to some sane value
872 vana 106
	movl r12 = stack0;;
869 vana 107
 
81 jermar 108
	add r12 = - 16, r12	/* allocate a scratch area on the stack */
60 jermar 109
 
74 jermar 110
	# initialize gp (Global Pointer) register
919 jermar 111
	movl r1 = _hardcoded_load_address
869 vana 112
 
893 jermar 113
	/*
114
	 * Initialize hardcoded_* variables.
115
	 */
106 jermar 116
	movl r14 = _hardcoded_ktext_size
117
	movl r15 = _hardcoded_kdata_size
919 jermar 118
	movl r16 = _hardcoded_load_address ;;
106 jermar 119
	addl r17 = @gprel(hardcoded_ktext_size), gp
120
	addl r18 = @gprel(hardcoded_kdata_size), gp
121
	addl r19 = @gprel(hardcoded_load_address), gp
122
	;;
870 vana 123
	st8 [r17] = r14
124
	st8 [r18] = r15
106 jermar 125
	st8 [r19] = r16
869 vana 126
 
893 jermar 127
	movl r18=main_bsp ;;
128
	mov b1=r18 ;;
869 vana 129
	br.call.sptk.many b0=b1
51 jermar 130
 
36 jermar 131
0:
39 jermar 132
	br 0b