2 * Copyright 2004 by Peter Grehan. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. The name of the author may not be used to endorse or promote products
13 * derived from this software without specific prior written permission.
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,
20 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
22 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * Machine-dependent thread prototypes/definitions.
33 #ifndef _PTHREAD_MD_H_
34 #define _PTHREAD_MD_H_
37 #include <sys/types.h>
41 #define DTV_OFFSET offsetof(struct tcb, tcb_dtv)
42 #define TP_OFFSET 0x7008
45 * Variant I tcb. The structure layout is fixed, don't blindly
47 * %r2 points to end of the structure.
51 struct pthread *tcb_thread;
54 struct tcb *_tcb_ctor(struct pthread *, int);
55 void _tcb_dtor(struct tcb *);
58 _tcb_set(struct tcb *tcb)
60 register uint8_t *_tp __asm__("%r2");
62 __asm __volatile("mr %0,%1" : "=r"(_tp) :
63 "r"((uint8_t *)tcb + TP_OFFSET));
66 static __inline struct tcb *
69 register uint8_t *_tp __asm__("%r2");
71 return ((struct tcb *)(_tp - TP_OFFSET));
74 extern struct pthread *_thr_initial;
76 static __inline struct pthread *
80 return (_tcb_get()->tcb_thread);
84 #endif /* _PTHREAD_MD_H_ */