WebSVN – HelenOS – Diff – /branches/sparc/kernel/arch/sparc64/src/sun4v/asm.S


#
# Copyright (c) 2008 Pavel Rimsky
# 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/mm/mmu.h>
#include <arch/regdef.h>
#include <arch/stack.h>
 
.text
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
/** Switch to userspace.
 *
 * %o0	Userspace entry address.
 * %o1	Userspace stack pointer address.
 * %o2  Userspace address of uarg structure.
 */
.global switch_to_userspace
switch_to_userspace:
 
	save %o1, -STACK_WINDOW_SAVE_AREA_SIZE, %sp
	flushw
	wrpr %g0, 0, %cleanwin		! avoid information leak
 
	mov %i2, %o0			! uarg
	xor %o1, %o1, %o1		! %o1 is defined to hold pcb_ptr
					! set it to 0
	clr %i2
	clr %i3
	clr %i4
	clr %i5
	clr %i6
	wrpr %g0, 1, %tl		! enforce mapping via nucleus
 
	rdpr %cwp, %g1
	wrpr %g1, TSTATE_IE_BIT, %tstate
	wrpr %i0, 0, %tnpc
	
	/*
	 * Set primary context according to secondary context.
	 * Secondary context has been already installed by
	 * higher-level functions.
	 */
	wr %g0, ASI_SECONDARY_CONTEXT_REG, %asi
	ldxa [VA_SECONDARY_CONTEXT_REG] %asi, %g1
	wr %g0, ASI_PRIMARY_CONTEXT_REG, %asi
	stxa %g1, [VA_PRIMARY_CONTEXT_REG] %asi
	flush %i7
 
	/*
	 * Spills and fills will be handled by the userspace handlers.
	 */
	wrpr %g0, WSTATE_OTHER(0) | WSTATE_NORMAL(1), %wstate
 
	done				! jump to userspace
 
 

Rev 3863	Rev 3993
1	#	1	#
2	# Copyright (c) 2008 Pavel Rimsky	2	# Copyright (c) 2008 Pavel Rimsky
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/mm/mmu.h>	29	#include <arch/mm/mmu.h>
30	#include <arch/regdef.h>	30	#include <arch/regdef.h>
31	#include <arch/stack.h>	31	#include <arch/stack.h>
32		32
33	.text	33	.text
34		34
35	/* TODO: remove it as soon as there is a scheduler for sun4v. It is here only to make the code compilable/ */	-
36		-
37	.global write_to_ag_g6	-
38	write_to_ag_g6:	-
39		-
40	.global write_to_ag_g7	-
41	write_to_ag_g7:	-
42		-
43	.global write_to_ig_g6	-
44	write_to_ig_g6:	-
45		-
46	.global read_from_ag_g7	-
47	read_from_ag_g7:	-
48		-
49	/** Switch to userspace.	35	/** Switch to userspace.
50	*	36	*
51	* %o0 Userspace entry address.	37	* %o0 Userspace entry address.
52	* %o1 Userspace stack pointer address.	38	* %o1 Userspace stack pointer address.
53	* %o2 Userspace address of uarg structure.	39	* %o2 Userspace address of uarg structure.
54	*/	40	*/
55	.global switch_to_userspace	41	.global switch_to_userspace
56	switch_to_userspace:	42	switch_to_userspace:
57	#if 0	-
58	save %o1, -STACK_WINDOW_SAVE_AREA_SIZE, %sp	43	save %o1, -STACK_WINDOW_SAVE_AREA_SIZE, %sp
59	flushw	44	flushw
60	wrpr %g0, 0, %cleanwin ! avoid information leak	45	wrpr %g0, 0, %cleanwin ! avoid information leak
61		46
62	mov %i2, %o0 ! uarg	47	mov %i2, %o0 ! uarg
63	xor %o1, %o1, %o1 ! %o1 is defined to hold pcb_ptr	48	xor %o1, %o1, %o1 ! %o1 is defined to hold pcb_ptr
64	! set it to 0	49	! set it to 0
65	clr %i2	50	clr %i2
66	clr %i3	51	clr %i3
67	clr %i4	52	clr %i4
68	clr %i5	53	clr %i5
69	clr %i6	54	clr %i6
70	wrpr %g0, 1, %tl ! enforce mapping via nucleus	55	wrpr %g0, 1, %tl ! enforce mapping via nucleus
71		56
72	rdpr %cwp, %g1	57	rdpr %cwp, %g1
73	wrpr %g1, TSTATE_IE_BIT, %tstate	58	wrpr %g1, TSTATE_IE_BIT, %tstate
74	wrpr %i0, 0, %tnpc	59	wrpr %i0, 0, %tnpc
75		60
76	/*	61	/*
77	* Set primary context according to secondary context.	62	* Set primary context according to secondary context.
78	* Secondary context has been already installed by	63	* Secondary context has been already installed by
79	* higher-level functions.	64	* higher-level functions.
80	*/	65	*/
81	wr %g0, ASI_SECONDARY_CONTEXT_REG, %asi	66	wr %g0, ASI_SECONDARY_CONTEXT_REG, %asi
82	ldxa [VA_SECONDARY_CONTEXT_REG] %asi, %g1	67	ldxa [VA_SECONDARY_CONTEXT_REG] %asi, %g1
83	wr %g0, ASI_PRIMARY_CONTEXT_REG, %asi	68	wr %g0, ASI_PRIMARY_CONTEXT_REG, %asi
84	stxa %g1, [VA_PRIMARY_CONTEXT_REG] %asi	69	stxa %g1, [VA_PRIMARY_CONTEXT_REG] %asi
85	flush %i7	70	flush %i7
86		71
87	/*	72	/*
88	* Spills and fills will be handled by the userspace handlers.	73	* Spills and fills will be handled by the userspace handlers.
89	*/	74	*/
90	wrpr %g0, WSTATE_OTHER(0) \| WSTATE_NORMAL(1), %wstate	75	wrpr %g0, WSTATE_OTHER(0) \| WSTATE_NORMAL(1), %wstate
91		76
92	done ! jump to userspace	77	done ! jump to userspace
93	#endif	-
94		78

Subversion Repositories HelenOS

(root)/branches/sparc/kernel/arch/sparc64/src/sun4v/asm.S – Rev 3863 → 3993