WebSVN – HelenOS-historic – Diff – /kernel/trunk/arch/ia64/src/asm.S


#
# Copyright (C) 2005 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 <arch/register.h>
 
.text
 
.global memcpy
memcpy:
	br _memcpy
 
.global memsetb
memsetb:
	br _memsetb
 
.global cpu_halt
cpu_halt:
	br cpu_halt
 
.global panic_printf
panic_printf:
	{
		br.call.sptk.many b0=printf
	}
	br halt
 
/** Switch to userspace - low level code.
 *
 * @param in0 Userspace entry point address.
 * @param in1 Userspace stack pointer address.
 * @param in2 Userspace register stack pointer address.
 * @param in3 Userspace address of thread uspace_arg_t structure.
 * @param in4 Value to be stored in IPSR.
 * @param in5 Value to be stored in RSC.
 */
.global switch_to_userspace
switch_to_userspace:
	alloc loc0 = ar.pfs, 6, 3, 0, 0
	rsm (PSR_IC_MASK | PSR_I_MASK)		/* disable interruption collection and interrupts */
	srlz.d ;;
	srlz.i ;;
	
	mov cr.ipsr = in4
	mov cr.iip = in0
	mov r12 = in1
 
	xor r1 = r1, r1
	
	mov loc1 = cr.ifs
	movl loc2 = PFM_MASK ;;
	and loc1 = loc2, loc1 ;;
	mov cr.ifs = loc1 ;;			/* prevent decrementing BSP by rfi */
 
	invala
	
	mov loc1 = ar.rsc ;;
	and loc1 = ~3, loc1 ;;			
	mov ar.rsc = loc1 ;;			/* put RSE into enforced lazy mode */
 
	flushrs ;;
	
	mov ar.bspstore = in2 ;;
	mov ar.rsc = in5 ;;
	
	mov r8 = in3
	
	rfi ;;
 

Rev 993	Rev 1078
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/register.h>	29	#include <arch/register.h>
30		30
31	.text	31	.text
32		32
33	.global memcpy	33	.global memcpy
34	memcpy:	34	memcpy:
35	br _memcpy	35	br _memcpy
36		36
37	.global memsetb	37	.global memsetb
38	memsetb:	38	memsetb:
39	br _memsetb	39	br _memsetb
40		40
41	.global cpu_halt	41	.global cpu_halt
42	cpu_halt:	42	cpu_halt:
43	br cpu_halt	43	br cpu_halt
44		44
45	.global panic_printf	45	.global panic_printf
46	panic_printf:	46	panic_printf:
47	{	47	{
48	br.call.sptk.many b0=printf	48	br.call.sptk.many b0=printf
49	}	49	}
50	br halt	50	br halt
51		51
52	/** Switch to userspace - low level code.	52	/** Switch to userspace - low level code.
53	*	53	*
54	* @param in0 Userspace entry point address.	54	* @param in0 Userspace entry point address.
55	* @param in1 Userspace stack pointer address.	55	* @param in1 Userspace stack pointer address.
56	* @param in2 Userspace register stack pointer address.	56	* @param in2 Userspace register stack pointer address.
-		57	* @param in3 Userspace address of thread uspace_arg_t structure.
57	* @param in3 Value to be stored in IPSR.	58	* @param in4 Value to be stored in IPSR.
58	* @param in4 Value to be stored in RSC.	59	* @param in5 Value to be stored in RSC.
59	*/	60	*/
60	.global switch_to_userspace	61	.global switch_to_userspace
61	switch_to_userspace:	62	switch_to_userspace:
62	alloc loc0 = ar.pfs, 5, 3, 0, 0	63	alloc loc0 = ar.pfs, 6, 3, 0, 0
63	rsm (PSR_IC_MASK \| PSR_I_MASK) /* disable interruption collection and interrupts */	64	rsm (PSR_IC_MASK \| PSR_I_MASK) /* disable interruption collection and interrupts */
64	srlz.d ;;	65	srlz.d ;;
65	srlz.i ;;	66	srlz.i ;;
66		67
67	mov cr.ipsr = in3	68	mov cr.ipsr = in4
68	mov cr.iip = in0	69	mov cr.iip = in0
69	mov r12 = in1	70	mov r12 = in1
70		71
71	xor r1 = r1, r1	72	xor r1 = r1, r1
72		73
73	mov loc1 = cr.ifs	74	mov loc1 = cr.ifs
74	movl loc2 = PFM_MASK ;;	75	movl loc2 = PFM_MASK ;;
75	and loc1 = loc2, loc1 ;;	76	and loc1 = loc2, loc1 ;;
76	mov cr.ifs = loc1 ;; /* prevent decrementing BSP by rfi */	77	mov cr.ifs = loc1 ;; /* prevent decrementing BSP by rfi */
77		78
78	invala	79	invala
79		80
80	mov loc1 = ar.rsc ;;	81	mov loc1 = ar.rsc ;;
81	and loc1 = ~3, loc1 ;;	82	and loc1 = ~3, loc1 ;;
82	mov ar.rsc = loc1 ;; /* put RSE into enforced lazy mode */	83	mov ar.rsc = loc1 ;; /* put RSE into enforced lazy mode */
83		84
84	flushrs ;;	85	flushrs ;;
85		86
86	mov ar.bspstore = in2 ;;	87	mov ar.bspstore = in2 ;;
87	mov ar.rsc = in4 ;;	88	mov ar.rsc = in5 ;;
-		89
-		90	mov r8 = in3
88		91
89	rfi ;;	92	rfi ;;
90		93

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/ia64/src/asm.S – Rev 993 → 1078