WebSVN – HelenOS – Diff – /trunk/boot/arch/sparc64/loader/boot.S


#
# Copyright (c) 2006 Martin Decky
# Copyright (c) 2006 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 <stack.h>
#include <register.h>
 
#define INITIAL_STACK_SIZE 	8192
 
#define NWINDOWS		8
 
.register %g2, #scratch
.register %g3, #scratch
.register %g6, #scratch
.register %g7, #scratch
 
.section BOOTSTRAP, "ax"
 
.global start
start:
	b 1f
	nop
 
/*
 * This header forces SILO to load the image at 0x4000.
 * More precisely, SILO will think this is an old version of Linux.
 */
	.ascii "HdrS"
	.word 0
	.half 0
 
.align 8
1:	
	/*
	 * Disable interrupts and disable address masking.
	 */
	wrpr %g0, PSTATE_PRIV_BIT, %pstate
	
	wrpr %g0, NWINDOWS - 2, %cansave	! set maximum saveable windows
	wrpr %g0, 0, %canrestore		! get rid of windows we will never need again
	wrpr %g0, 0, %otherwin			! make sure the window state is consistent
	wrpr %g0, NWINDOWS - 1, %cleanwin	! prevent needless clean_window traps for kernel
 
	set initial_stack_top, %sp
	add %sp, -STACK_BIAS, %sp
 
	set ofw_cif, %l0
 
	call ofw_init		! initialize OpenFirmware
	stx %o4, [%l0]
	
	b bootstrap
	nop
 
.align STACK_ALIGNMENT
initial_stack:
	.space INITIAL_STACK_SIZE
initial_stack_top:
	.space STACK_WINDOW_SAVE_AREA_SIZE
 

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

Subversion Repositories HelenOS

(root)/trunk/boot/arch/sparc64/loader/boot.S – Rev 1972 → 2071