1 | /* |
2 | * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved. |
3 | * |
4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
5 | * |
6 | * This file contains Original Code and/or Modifications of Original Code |
7 | * as defined in and that are subject to the Apple Public Source License |
8 | * Version 2.0 (the 'License'). You may not use this file except in |
9 | * compliance with the License. The rights granted to you under the License |
10 | * may not be used to create, or enable the creation or redistribution of, |
11 | * unlawful or unlicensed copies of an Apple operating system, or to |
12 | * circumvent, violate, or enable the circumvention or violation of, any |
13 | * terms of an Apple operating system software license agreement. |
14 | * |
15 | * Please obtain a copy of the License at |
16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. |
17 | * |
18 | * The Original Code and all software distributed under the License are |
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26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
27 | */ |
28 | /* |
29 | * Copyright (C) 1998 Apple Computer |
30 | * All Rights Reserved |
31 | */ |
32 | /* |
33 | * @OSF_COPYRIGHT@ |
34 | */ |
35 | /* |
36 | * Mach Operating System |
37 | * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University |
38 | * All Rights Reserved. |
39 | * |
40 | * Permission to use, copy, modify and distribute this software and its |
41 | * documentation is hereby granted, provided that both the copyright |
42 | * notice and this permission notice appear in all copies of the |
43 | * software, derivative works or modified versions, and any portions |
44 | * thereof, and that both notices appear in supporting documentation. |
45 | * |
46 | * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" |
47 | * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR |
48 | * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. |
49 | * |
50 | * Carnegie Mellon requests users of this software to return to |
51 | * |
52 | * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU |
53 | * School of Computer Science |
54 | * Carnegie Mellon University |
55 | * Pittsburgh PA 15213-3890 |
56 | * |
57 | * any improvements or extensions that they make and grant Carnegie Mellon |
58 | * the rights to redistribute these changes. |
59 | */ |
60 | /* |
61 | * File: kern/simple_lock.h (derived from kern/lock.h) |
62 | * Author: Avadis Tevanian, Jr., Michael Wayne Young |
63 | * Date: 1985 |
64 | * |
65 | * Atomic primitives and Simple Locking primitives definitions |
66 | */ |
67 | |
68 | #ifdef KERNEL_PRIVATE |
69 | |
70 | #ifndef _KERN_SIMPLE_LOCK_H_ |
71 | #define _KERN_SIMPLE_LOCK_H_ |
72 | |
73 | #include <sys/cdefs.h> |
74 | #include <mach/boolean.h> |
75 | #include <kern/kern_types.h> |
76 | #include <machine/simple_lock.h> |
77 | |
78 | #ifdef MACH_KERNEL_PRIVATE |
79 | #include <mach_ldebug.h> |
80 | |
81 | extern void hw_lock_init( |
82 | hw_lock_t); |
83 | |
84 | extern void hw_lock_lock( |
85 | hw_lock_t); |
86 | |
87 | extern void hw_lock_lock_nopreempt( |
88 | hw_lock_t); |
89 | |
90 | extern void hw_lock_unlock( |
91 | hw_lock_t); |
92 | |
93 | extern void hw_lock_unlock_nopreempt( |
94 | hw_lock_t); |
95 | |
96 | extern unsigned int hw_lock_to( |
97 | hw_lock_t, |
98 | uint64_t); |
99 | |
100 | extern unsigned int hw_lock_try( |
101 | hw_lock_t); |
102 | |
103 | extern unsigned int hw_lock_try_nopreempt( |
104 | hw_lock_t); |
105 | |
106 | extern unsigned int hw_lock_held( |
107 | hw_lock_t); |
108 | |
109 | #endif /* MACH_KERNEL_PRIVATE */ |
110 | |
111 | __BEGIN_DECLS |
112 | |
113 | extern uint32_t hw_atomic_add( |
114 | volatile uint32_t *dest, |
115 | uint32_t delt); |
116 | |
117 | extern uint32_t hw_atomic_sub( |
118 | volatile uint32_t *dest, |
119 | uint32_t delt); |
120 | |
121 | extern uint32_t hw_atomic_or( |
122 | volatile uint32_t *dest, |
123 | uint32_t mask); |
124 | |
125 | extern uint32_t hw_atomic_and( |
126 | volatile uint32_t *dest, |
127 | uint32_t mask); |
128 | |
129 | /* |
130 | * Variant of hw_atomic_or which doesn't return a value; potentially |
131 | * more efficient on some platforms. |
132 | */ |
133 | extern void hw_atomic_or_noret( |
134 | volatile uint32_t *dest, |
135 | uint32_t mask); |
136 | /* |
137 | * Variant of hw_atomic_and which doesn't return a value; potentially |
138 | * more efficient on some platforms. |
139 | */ |
140 | |
141 | extern void hw_atomic_and_noret( |
142 | volatile uint32_t *dest, |
143 | uint32_t mask); |
144 | |
145 | extern uint32_t hw_compare_and_store( |
146 | uint32_t oldval, |
147 | uint32_t newval, |
148 | volatile uint32_t *dest); |
149 | |
150 | extern void hw_queue_atomic( |
151 | unsigned int *anchor, |
152 | unsigned int *elem, |
153 | unsigned int disp); |
154 | |
155 | extern void hw_queue_atomic_list( |
156 | unsigned int *anchor, |
157 | unsigned int *first, |
158 | unsigned int *last, |
159 | unsigned int disp); |
160 | |
161 | extern unsigned int *hw_dequeue_atomic( |
162 | unsigned int *anchor, |
163 | unsigned int disp); |
164 | |
165 | extern void usimple_lock_init( |
166 | usimple_lock_t, |
167 | unsigned short); |
168 | |
169 | extern void usimple_lock( |
170 | usimple_lock_t); |
171 | |
172 | extern void usimple_unlock( |
173 | usimple_lock_t); |
174 | |
175 | extern unsigned int usimple_lock_try( |
176 | usimple_lock_t); |
177 | |
178 | extern void usimple_lock_try_lock_loop( |
179 | usimple_lock_t); |
180 | |
181 | __END_DECLS |
182 | |
183 | #define ETAP_NO_TRACE 0 |
184 | #define ETAP_IO_AHA 0 |
185 | |
186 | /* |
187 | * If we got to here and we still don't have simple_lock_init |
188 | * defined, then we must either be outside the osfmk component, |
189 | * running on a true SMP, or need debug. |
190 | */ |
191 | #if !defined(simple_lock_init) |
192 | #define simple_lock_init(l,t) usimple_lock_init(l,t) |
193 | #define simple_lock(l) usimple_lock(l) |
194 | #define simple_unlock(l) usimple_unlock(l) |
195 | #define simple_lock_try(l) usimple_lock_try(l) |
196 | #define simple_lock_try_lock_loop(l) usimple_lock_try_lock_loop(l) |
197 | #define simple_lock_addr(l) (&(l)) |
198 | #endif /* !defined(simple_lock_init) */ |
199 | |
200 | #endif /*!_KERN_SIMPLE_LOCK_H_*/ |
201 | |
202 | #endif /* KERNEL_PRIVATE */ |
203 | |