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      1 /*	$NetBSD: pthread_md.h,v 1.8 2011/01/25 19:12:06 christos Exp $ */
      2 
      3 /*
      4  * Copyright 2003 Wasabi Systems, Inc.
      5  * All rights reserved.
      6  *
      7  * Written by Steve C. Woodford for Wasabi Systems, Inc.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  * 3. All advertising materials mentioning features or use of this software
     18  *    must display the following acknowledgement:
     19  *      This product includes software developed for the NetBSD Project by
     20  *      Wasabi Systems, Inc.
     21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
     22  *    or promote products derived from this software without specific prior
     23  *    written permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
     26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
     29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     35  * POSSIBILITY OF SUCH DAMAGE.
     36  */
     37 
     38 #ifndef _LIB_PTHREAD_SH3_MD_H
     39 #define _LIB_PTHREAD_SH3_MD_H
     40 
     41 static inline unsigned long
     42 pthread__sp(void)
     43 {
     44 	unsigned long ret;
     45 	__asm("mov r15, %0" : "=r" (ret));
     46 
     47 	return ret;
     48 }
     49 
     50 #define pthread__uc_sp(ucp) ((ucp)->uc_mcontext.__gregs[_REG_R15])
     51 
     52 /*
     53  * Set initial, sane values for registers whose values aren't just
     54  * "don't care".
     55  */
     56 #define _INITCONTEXT_U_MD(ucp)						\
     57 	(ucp)->uc_mcontext.__gregs[_REG_SR] = 0;
     58 
     59 /* sh3 will not go SMP */
     60 #define	PTHREAD__ATOMIC_IS_MEMBAR
     61 
     62 #endif /* _LIB_PTHREAD_SH3_MD_H */
     63