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pthread_md.h revision 1.4 
      1 /*	$NetBSD: pthread_md.h,v 1.4 2008/02/10 18:50:55 ad 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 long
     42 pthread__sp(void)
     43 {
     44 	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 #define pthread__uc_pc(ucp) ((ucp)->uc_mcontext.__gregs[_REG_PC])
     52 
     53 /*
     54  * Set initial, sane values for registers whose values aren't just
     55  * "don't care".
     56  */
     57 #define _INITCONTEXT_U_MD(ucp)						\
     58 	(ucp)->uc_mcontext.__gregs[_REG_SR] = 0;
     59 
     60 /*
     61  * SH3 requires no extra stack space
     62  */
     63 #define STACKSPACE	0
     64 
     65 
     66 /*
     67  * Conversions between struct reg and struct mcontext. Used by
     68  * libpthread_dbg.
     69  */
     70 
     71 #define PTHREAD_UCONTEXT_TO_REG(reg, uc)				\
     72 	memcpy((reg), &(uc)->uc_mcontext.__gregs[0], sizeof(*(reg)))
     73 
     74 #define PTHREAD_REG_TO_UCONTEXT(uc, reg) do {				\
     75 	memcpy(&(uc)->uc_mcontext.__gregs[0], (reg), sizeof(*(reg)));	\
     76 	(uc)->uc_flags = ((uc)->uc_flags | _UC_CPU) & ~_UC_USER;	\
     77 	} while (/*CONSTCOND*/0)
     78 
     79 #if 0 /* no struct fpreg!!! */
     80 #define PTHREAD_UCONTEXT_TO_FPREG(freg, uc)       			\
     81 	memcpy((freg), &(uc)->uc_mcontext.__fpregs, sizeof(*(freg)));
     82 
     83 #define PTHREAD_FPREG_TO_UCONTEXT(uc, freg) do {       	       		\
     84 	memcpy(&(uc)->uc_mcontext.__fpregs, (freg), sizeof(*(freg)));	\
     85 	(uc)->uc_flags = ((uc)->uc_flags | _UC_FPU) & ~_UC_USER;       	\
     86 	} while (/*CONSTCOND*/0)
     87 
     88 #else  /* SBUBS */
     89 #define PTHREAD_UCONTEXT_TO_FPREG(freg, uc)
     90 #define PTHREAD_FPREG_TO_UCONTEXT(uc, freg)
     91 #endif
     92 
     93 /* sh3 will not go SMP */
     94 #define	PTHREAD__ATOMIC_IS_MEMBAR
     95 
     96 #endif /* _LIB_PTHREAD_SH3_MD_H */
     97