Subversion Repositories HelenOS

Rev

Rev 3386 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
1018 decky 1
#
2071 jermar 2
# Copyright (c) 2006 Martin Decky
3
# Copyright (c) 2006 Jakub Jermar
1018 decky 4
# All rights reserved.
5
#
6
# Redistribution and use in source and binary forms, with or without
7
# modification, are permitted provided that the following conditions
8
# are met:
9
#
10
# - Redistributions of source code must retain the above copyright
11
#   notice, this list of conditions and the following disclaimer.
12
# - Redistributions in binary form must reproduce the above copyright
13
#   notice, this list of conditions and the following disclaimer in the
14
#   documentation and/or other materials provided with the distribution.
15
# - The name of the author may not be used to endorse or promote products
16
#   derived from this software without specific prior written permission.
17
#
18
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
#
29
 
1791 jermar 30
#include <stack.h>
31
#include <register.h>
1018 decky 32
 
1972 jermar 33
#define INITIAL_STACK_SIZE 	8192
1783 jermar 34
 
1972 jermar 35
#define NWINDOWS		8
36
 
1773 jermar 37
.register %g2, #scratch
38
.register %g3, #scratch
39
.register %g6, #scratch
40
.register %g7, #scratch
41
 
1771 jermar 42
.section BOOTSTRAP, "ax"
1018 decky 43
 
44
.global start
45
start:
1773 jermar 46
	b 1f
47
	nop
48
 
49
/*
50
 * This header forces SILO to load the image at 0x4000.
51
 * More precisely, SILO will think this is an old version of Linux.
52
 */
53
	.ascii "HdrS"
54
	.word 0
55
	.half 0
4153 mejdrech 56
	.half 0
57
	.half 0
58
	.half 0
59
.global silo_ramdisk_image
60
silo_ramdisk_image:
61
	.word 0
62
.global silo_ramdisk_size
63
silo_ramdisk_size:
64
	.word 0
1773 jermar 65
 
66
.align 8
67
1:	
1783 jermar 68
	/*
1789 jermar 69
	 * Disable interrupts and disable address masking.
1783 jermar 70
	 */
1906 jermar 71
	wrpr %g0, PSTATE_PRIV_BIT, %pstate
1972 jermar 72
 
73
	wrpr %g0, NWINDOWS - 2, %cansave	! set maximum saveable windows
74
	wrpr %g0, 0, %canrestore		! get rid of windows we will never need again
75
	wrpr %g0, 0, %otherwin			! make sure the window state is consistent
76
	wrpr %g0, NWINDOWS - 1, %cleanwin	! prevent needless clean_window traps for kernel
1783 jermar 77
 
1906 jermar 78
	set initial_stack_top, %sp
79
	add %sp, -STACK_BIAS, %sp
1773 jermar 80
 
1783 jermar 81
	set ofw_cif, %l0
1773 jermar 82
 
1789 jermar 83
	call ofw_init		! initialize OpenFirmware
1773 jermar 84
	stx %o4, [%l0]
1685 decky 85
 
1771 jermar 86
	b bootstrap
1018 decky 87
	nop
1791 jermar 88
 
1792 jermar 89
.align STACK_ALIGNMENT
1791 jermar 90
initial_stack:
91
	.space INITIAL_STACK_SIZE
92
initial_stack_top:
93
	.space STACK_WINDOW_SAVE_AREA_SIZE