1 /*-
2 * Copyright (c) 2022 The FreeBSD Foundation
3 *
4 * This software was developed by Andrew Turner under sponsorship from
5 * the FreeBSD Foundation.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. 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 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30
31 #include <sys/param.h>
32
33 #include <machine/atomic.h>
34 #include <machine/ifunc.h>
35
36 int casueword32_llsc(volatile uint32_t *, uint32_t, uint32_t *, uint32_t);
37 int casueword32_lse(volatile uint32_t *, uint32_t, uint32_t *, uint32_t);
38
39 int casueword_llsc(volatile u_long *, u_long, u_long *, u_long);
40 int casueword_lse(volatile u_long *, u_long, u_long *, u_long);
41
42 DEFINE_IFUNC(, int, casueword32, (volatile uint32_t *base, uint32_t oldval,
43 uint32_t *oldvalp, uint32_t newval))
44 {
45 if (lse_supported)
46 return (casueword32_lse);
47
48 return (casueword32_llsc);
49 }
50
51 DEFINE_IFUNC(, int, casueword, (volatile u_long *base, u_long oldval,
52 u_long *oldvalp, u_long newval))
53 {
54 if (lse_supported)
55 return (casueword_lse);
56
57 return (casueword_llsc);
58 }
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