1 /*-
2 * Copyright (c) 2005 David Xu <davidxu@freebsd.org>.
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 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 * from: src/lib/libthr/arch/arm/include/pthread_md.h,v 1.3 2005/10/29 13:40:31 davidxu
27 * $FreeBSD$
28 */
29
30 /*
31 * Machine-dependent thread prototypes/definitions.
32 */
33 #ifndef _PTHREAD_MD_H_
34 #define _PTHREAD_MD_H_
35
36 #include <sys/types.h>
37 #include <machine/sysarch.h>
38 #include <machine/tls.h>
39 #include <stddef.h>
40
41 #define CPU_SPINWAIT
42 #define DTV_OFFSET offsetof(struct tcb, tcb_dtv)
43
44 /*
45 * Variant I tcb. The structure layout is fixed, don't blindly
46 * change it!
47 */
48 struct tcb {
49 void *tcb_dtv;
50 struct pthread *tcb_thread;
51 };
52
53 /* Called from the thread to set its private data. */
54 static __inline void
_tcb_set(struct tcb * tcb)55 _tcb_set(struct tcb *tcb)
56 {
57
58 sysarch(MIPS_SET_TLS, tcb);
59 }
60
61 /*
62 * Get the current tcb.
63 */
64 static __inline struct tcb *
_tcb_get(void)65 _tcb_get(void)
66 {
67 struct tcb *tcb;
68
69 sysarch(MIPS_GET_TLS, &tcb);
70 return tcb;
71 }
72
73 extern struct pthread *_thr_initial;
74
75 static __inline struct pthread *
_get_curthread(void)76 _get_curthread(void)
77 {
78 if (_thr_initial)
79 return (_tcb_get()->tcb_thread);
80 return (NULL);
81 }
82
83 #endif /* _PTHREAD_MD_H_ */
84