1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *  * Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 *  * Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in
12 *    the documentation and/or other materials provided with the
13 *    distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <asm/unistd.h>
30
31#define FUTEX_WAIT 0
32#define FUTEX_WAKE 1
33
34/*
35 * __futex_wait(*ftx, val, *timespec)
36 * futex_syscall(*ftx, op, val, *timespec, *addr2, val3)
37 */
38	.type	__futex_wait, @function
39	.global	__futex_wait
40	.align	4
41	.ent	__futex_wait
42__futex_wait:
43	subu	$sp,4*6
44	sw	$0,20($sp)	/* val3 */
45	sw	$0,16($sp)	/* addr2 */
46	move	$a3,$a2		/* timespec */
47	move	$a2,$a1		/* val */
48	li	$a1,FUTEX_WAIT	/* op */
49#	move	$a0,$a0		/* ftx */
50	li	$v0,__NR_futex
51	syscall
52	.set noreorder
53	bnez	$a3, 1f		/* Check for error */
54         neg	$v0		/* Negate error number if it's valid */
55	move	$v0,$0		/* Otherwise return 0 */
561:
57	.set reorder
58	addu	$sp,4*6
59	j	$ra
60	.end	__futex_wait
61
62/*
63 * int __futex_wake(volatile void *ftx, int count)
64 * int futex_syscall(*ftx, op, val, *timespec, *addr2, val3)
65 */
66	.type	__futex_wake, @function
67	.globl	__futex_wake
68	.align	4
69	.ent	__futex_wake
70__futex_wake:
71	subu	$sp,4*6
72	sw	$0,20($sp)	/* val3 */
73	sw	$0,16($sp)	/* addr2 */
74	move	$a3,$0		/* timespec */
75	move	$a2,$a1		/* val */
76	li	$a1,FUTEX_WAKE	/* op */
77#	move	$a0,$a0		/* ftx */
78	li	$v0,__NR_futex
79	syscall
80	.set noreorder
81	bnez	$a3, 1f		/* Check for error */
82         neg	$v0		/* Negate error number if it's valid */
83	move	$v0,$0		/* Otherwise return 0 */
841:
85	.set reorder
86	addu	$sp,4*6
87	j	$ra
88	.end	__futex_wake
89
90/* __futex_syscall3(*ftx, op, val)
91 * futex_syscall(*ftx, op, val, *timespec, *addr2, val3)
92 */
93	.type	__futex_syscall3, @function
94	.global	__futex_syscall3
95	.align	4
96	.ent	__futex_syscall3
97__futex_syscall3:
98	subu	$sp,4*6
99	sw	$0,20($sp)	/* val3 */
100	sw	$0,16($sp)	/* addr2 */
101	move	$a3,$0		/* timespec */
102#	move	$a2,$a2		/* val */
103#	li	$a1,$a1		/* op */
104#	move	$a0,$a0		/* ftx */
105	li	$v0,__NR_futex
106	syscall
107	.set noreorder
108	bnez	$a3, 1f		/* Check for error */
109         neg	$v0		/* Negate error number if it's valid */
110	move	$v0,$0		/* Otherwise return 0 */
1111:
112	.set reorder
113	addu	$sp,4*6
114	j	$ra
115	.end	__futex_syscall3
116
117/* __futex_syscall4(*ftx, op, val)
118 * futex_syscall(*ftx, op, val, *timespec, *addr2, val3)
119 */
120	.type	__futex_syscall4, @function
121	.global	__futex_syscall4
122	.align	4
123	.ent	__futex_syscall4
124__futex_syscall4:
125	subu	$sp,4*6
126	sw	$0,20($sp)	/* val3 */
127	sw	$0,16($sp)	/* addr2 */
128#	move	$a3,$a3		/* timespec */
129#	move	$a2,$a2		/* val */
130#	li	$a1,$a1		/* op */
131#	move	$a0,$a0		/* ftx */
132	li	$v0,__NR_futex
133	syscall
134	.set noreorder
135	bnez	$a3, 1f		/* Check for error */
136         neg	$v0		/* Negate error number if it's valid */
137	move	$v0,$0		/* Otherwise return 0 */
1381:
139	.set reorder
140	addu	$sp,4*6
141	j	$ra
142	.end	__futex_syscall4
143