| @@ -1,104 +1,109 @@ | | | @@ -1,104 +1,109 @@ |
1 | /* $NetBSD: lock.h,v 1.16 2019/11/29 20:05:49 riastradh Exp $ */ | | 1 | /* $NetBSD: lock.h,v 1.17 2022/02/13 13:41:44 riastradh Exp $ */ |
2 | | | 2 | |
3 | /*- | | 3 | /*- |
4 | * Copyright (c) 2000 The NetBSD Foundation, Inc. | | 4 | * Copyright (c) 2000 The NetBSD Foundation, Inc. |
5 | * All rights reserved. | | 5 | * All rights reserved. |
6 | * | | 6 | * |
7 | * This code is derived from software contributed to The NetBSD Foundation | | 7 | * This code is derived from software contributed to The NetBSD Foundation |
8 | * by Jason R. Thorpe. | | 8 | * by Jason R. Thorpe. |
9 | * | | 9 | * |
10 | * Redistribution and use in source and binary forms, with or without | | 10 | * Redistribution and use in source and binary forms, with or without |
11 | * modification, are permitted provided that the following conditions | | 11 | * modification, are permitted provided that the following conditions |
12 | * are met: | | 12 | * are met: |
13 | * 1. Redistributions of source code must retain the above copyright | | 13 | * 1. Redistributions of source code must retain the above copyright |
14 | * notice, this list of conditions and the following disclaimer. | | 14 | * notice, this list of conditions and the following disclaimer. |
15 | * 2. Redistributions in binary form must reproduce the above copyright | | 15 | * 2. Redistributions in binary form must reproduce the above copyright |
16 | * notice, this list of conditions and the following disclaimer in the | | 16 | * notice, this list of conditions and the following disclaimer in the |
17 | * documentation and/or other materials provided with the distribution. | | 17 | * documentation and/or other materials provided with the distribution. |
18 | * | | 18 | * |
19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS | | 19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED | | 20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | | 21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS | | 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | | 23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | | 24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | | 25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | | 26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | | 27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | | 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
29 | * POSSIBILITY OF SUCH DAMAGE. | | 29 | * POSSIBILITY OF SUCH DAMAGE. |
30 | */ | | 30 | */ |
31 | | | 31 | |
32 | /* | | 32 | /* |
33 | * Machine-dependent spin lock operations. | | 33 | * Machine-dependent spin lock operations. |
34 | */ | | 34 | */ |
35 | | | 35 | |
36 | #ifndef _M68K_LOCK_H_ | | 36 | #ifndef _M68K_LOCK_H_ |
37 | #define _M68K_LOCK_H_ | | 37 | #define _M68K_LOCK_H_ |
38 | | | 38 | |
39 | static __inline int | | 39 | static __inline int |
40 | __SIMPLELOCK_LOCKED_P(const __cpu_simple_lock_t *__ptr) | | 40 | __SIMPLELOCK_LOCKED_P(const __cpu_simple_lock_t *__ptr) |
41 | { | | 41 | { |
42 | return *__ptr == __SIMPLELOCK_LOCKED; | | 42 | return *__ptr == __SIMPLELOCK_LOCKED; |
43 | } | | 43 | } |
44 | | | 44 | |
45 | static __inline int | | 45 | static __inline int |
46 | __SIMPLELOCK_UNLOCKED_P(const __cpu_simple_lock_t *__ptr) | | 46 | __SIMPLELOCK_UNLOCKED_P(const __cpu_simple_lock_t *__ptr) |
47 | { | | 47 | { |
48 | return *__ptr == __SIMPLELOCK_UNLOCKED; | | 48 | return *__ptr == __SIMPLELOCK_UNLOCKED; |
49 | } | | 49 | } |
50 | | | 50 | |
51 | static __inline void | | 51 | static __inline void |
52 | __cpu_simple_lock_init(__cpu_simple_lock_t *alp) | | 52 | __cpu_simple_lock_init(__cpu_simple_lock_t *alp) |
53 | { | | 53 | { |
54 | | | 54 | |
55 | *alp = __SIMPLELOCK_UNLOCKED; | | 55 | *alp = __SIMPLELOCK_UNLOCKED; |
56 | } | | 56 | } |
57 | | | 57 | |
58 | | | 58 | |
59 | static __inline void | | 59 | static __inline void |
60 | __cpu_simple_lock_clear(__cpu_simple_lock_t *__ptr) | | 60 | __cpu_simple_lock_clear(__cpu_simple_lock_t *__ptr) |
61 | { | | 61 | { |
62 | *__ptr = __SIMPLELOCK_UNLOCKED; | | 62 | *__ptr = __SIMPLELOCK_UNLOCKED; |
63 | } | | 63 | } |
64 | | | 64 | |
65 | static __inline void | | 65 | static __inline void |
66 | __cpu_simple_lock_set(__cpu_simple_lock_t *__ptr) | | 66 | __cpu_simple_lock_set(__cpu_simple_lock_t *__ptr) |
67 | { | | 67 | { |
68 | *__ptr = __SIMPLELOCK_LOCKED; | | 68 | *__ptr = __SIMPLELOCK_LOCKED; |
69 | } | | 69 | } |
70 | | | 70 | |
71 | static __inline void | | 71 | static __inline void |
72 | __cpu_simple_lock(__cpu_simple_lock_t *alp) | | 72 | __cpu_simple_lock(__cpu_simple_lock_t *alp) |
73 | { | | 73 | { |
74 | | | 74 | |
75 | __asm volatile( | | 75 | __asm volatile( |
76 | "1: tas %0 \n" | | 76 | "1: tas %0 \n" |
77 | " jne 1b \n" | | 77 | " jne 1b \n" |
78 | : "=m" (*alp)); | | 78 | : "=m" (*alp) |
| | | 79 | : /* no inputs */ |
| | | 80 | : "cc", "memory"); |
79 | } | | 81 | } |
80 | | | 82 | |
81 | static __inline int | | 83 | static __inline int |
82 | __cpu_simple_lock_try(__cpu_simple_lock_t *alp) | | 84 | __cpu_simple_lock_try(__cpu_simple_lock_t *alp) |
83 | { | | 85 | { |
84 | int __rv; | | 86 | int __rv; |
85 | | | 87 | |
86 | __asm volatile( | | 88 | __asm volatile( |
87 | " moveq #1, %1 \n" | | 89 | " moveq #1, %1 \n" |
88 | " tas %0 \n" | | 90 | " tas %0 \n" |
89 | " jeq 1f \n" | | 91 | " jeq 1f \n" |
90 | " moveq #0, %1 \n" | | 92 | " moveq #0, %1 \n" |
91 | "1: \n" | | 93 | "1: \n" |
92 | : "=m" (*alp), "=d" (__rv)); | | 94 | : "=m" (*alp), "=d" (__rv) |
| | | 95 | : /* no inputs */ |
| | | 96 | : "cc", "memory"); |
93 | | | 97 | |
94 | return (__rv); | | 98 | return (__rv); |
95 | } | | 99 | } |
96 | | | 100 | |
97 | static __inline void | | 101 | static __inline void |
98 | __cpu_simple_unlock(__cpu_simple_lock_t *alp) | | 102 | __cpu_simple_unlock(__cpu_simple_lock_t *alp) |
99 | { | | 103 | { |
100 | | | 104 | |
| | | 105 | __insn_barrier(); |
101 | *alp = __SIMPLELOCK_UNLOCKED; | | 106 | *alp = __SIMPLELOCK_UNLOCKED; |
102 | } | | 107 | } |
103 | | | 108 | |
104 | #endif /* _M68K_LOCK_H_ */ | | 109 | #endif /* _M68K_LOCK_H_ */ |