Subversion Repositories HelenOS-historic

Rev

Rev 895 | Go to most recent revision | Only display areas with differences | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 895 Rev 1777
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/boot/boot.h>
 29 
#include <arch/boot/boot.h>
30 
 
 30 
 
31 
.register %g2, #scratch
 31 
.register %g2, #scratch
32 
.register %g3, #scratch
 32 
.register %g3, #scratch
33 
.register %g6, #scratch
 33 
.register %g6, #scratch
34 
.register %g7, #scratch
 34 
.register %g7, #scratch
35 
 
 35 
 
36 
.section K_TEXT_START, "ax"
 36 
.section K_TEXT_START, "ax"
37 
 
 37 
 
38 
/*
 38 
/*
39 
 * Here is where the kernel is passed control.
 39 
 * Here is where the kernel is passed control.
40 
 * The code must be position independent until
 40 
 * The code must be position independent until
41 
 * the kernel relocates itself to its VMA.
 41 
 * the kernel relocates itself to its VMA.
42 
 */
 42 
 */
43 
 
 43 
 
44 
.global kernel_image_start
 44 
.global kernel_image_start
45 
kernel_image_start:
 45 
kernel_image_start:
46 
0:
 - 
 
47 
	b 1f
 - 
 
48 
	nop
 - 
 
49 
 
 - 
 
50 
/*
 - 
 
51 
 * This header forces SILO to load the kernel at 0x4000.
 - 
 
52 
 * More precisely, SILO will think this is an old version of Linux.
 - 
 
53 
 */
 - 
 
54 
.ascii "HdrS"
 - 
 
55 
.word 0
 - 
 
56 
.half 0
 - 
 
57 
 
 - 
 
58 
.align 8
 - 
 
59 
 
 - 
 
60 
1:
 - 
 
61 
	flushw				! flush all but the active register window
 46 
	flushw				! flush all but the active register window
62 
 
 47 
 
63 
	/*
 - 
 
64 
	 * Prepare to copy the kernel image to 4M.
 - 
 
65 
	 */
 - 
 
66 
 
 - 
 
67 
	set LMA, %g1			! source address
 - 
 
68 
	set VMA, %g2			! destination address
 - 
 
69 
	set hardcoded_ktext_size, %g3	! link address of hardcoded_ktext_size
 - 
 
70 
	set hardcoded_kdata_size, %g4	! link address of hardcoded_kdata_size
 - 
 
71 
 
 - 
 
72 
	sub %g3, %g2, %g3		! offset of hardcoded_ktext_size from the beginning of the load address
 - 
 
73 
	sub %g4, %g2, %g4		! offset of hardcoded_kdata_size from the beginning of the load address
 - 
 
74
- 
 
75 
	ldx [%g3 + %g1], %g3		! hardcoded_ktext_size -> %g3
 - 
 
76 
	ldx [%g4 + %g1], %g4		! hardcoded_kdata_size -> %g4
 - 
 
77 
 
 - 
 
78 
	add %g3, %g4, %g3		! size of kernel text and data
 - 
 
79 
 
 - 
 
80 
	/*
 - 
 
81 
	 * Start copying the kernel from higher addresses towards lower addresses.
 - 
 
82 
	 */
 - 
 
83 
 
 - 
 
84 
2:	dec %g3
 - 
 
85 
	ldub [%g1 + %g3], %g4
 - 
 
86 
	stb %g4, [%g2 + %g3]
 - 
 
87 
	cmp %g3, 0
 - 
 
88 
	bnz 2b
 - 
 
89 
	nop
 - 
 
90 
 
 - 
 
91 
	set relocated, %g1
 - 
 
92 
	jmp %g1
 - 
 
93 
	nop
 - 
 
94 
 
 - 
 
95 
relocated:
 - 
 
96 
	set ofw, %l0
 48 
	set ofw, %l0
97 
 
 49 
 
98 
	call ofw_init
 50 
	call ofw_init
99 
	stx %o4, [%l0]
 51 
	stx %o4, [%l0]
100 
 
 52 
 
101 
	call ofw_init_memmap
 53 
	call ofw_init_memmap
102 
	nop
 54 
	nop
103 
 
 55 
 
104 
	wrpr %r0, 0, %pil
 56 
	wrpr %r0, 0, %pil
105 
 
 57 
 
106 
	call main_bsp
 58 
	call main_bsp
107 
	nop
 59 
	nop
108 
 
 60 
 
109 
	/* Not reached. */
 61 
	/* Not reached. */
110 
 
 62 
 
111 
2:
 63 
2:
112 
	b 2b
 64 
	b 2b
113 
	nop
 65 
	nop
114 
 
 66