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mcontext.h revision 1.9.4.1
      1  1.9.4.1     yamt /*	$NetBSD: mcontext.h,v 1.9.4.1 2012/10/30 17:20:19 yamt Exp $	*/
      2      1.2  thorpej 
      3      1.2  thorpej /*-
      4      1.2  thorpej  * Copyright (c) 2001 The NetBSD Foundation, Inc.
      5      1.2  thorpej  * All rights reserved.
      6      1.2  thorpej  *
      7      1.2  thorpej  * This code is derived from software contributed to The NetBSD Foundation
      8      1.2  thorpej  * by Klaus Klein.
      9      1.2  thorpej  *
     10      1.2  thorpej  * Redistribution and use in source and binary forms, with or without
     11      1.2  thorpej  * modification, are permitted provided that the following conditions
     12      1.2  thorpej  * are met:
     13      1.2  thorpej  * 1. Redistributions of source code must retain the above copyright
     14      1.2  thorpej  *    notice, this list of conditions and the following disclaimer.
     15      1.2  thorpej  * 2. Redistributions in binary form must reproduce the above copyright
     16      1.2  thorpej  *    notice, this list of conditions and the following disclaimer in the
     17      1.2  thorpej  *    documentation and/or other materials provided with the distribution.
     18      1.2  thorpej  *
     19      1.2  thorpej  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20      1.2  thorpej  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21      1.2  thorpej  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22      1.2  thorpej  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23      1.2  thorpej  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24      1.2  thorpej  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25      1.2  thorpej  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26      1.2  thorpej  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27      1.2  thorpej  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28      1.2  thorpej  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29      1.2  thorpej  * POSSIBILITY OF SUCH DAMAGE.
     30      1.2  thorpej  */
     31      1.2  thorpej 
     32      1.2  thorpej #ifndef _SH3_MCONTEXT_H_
     33      1.2  thorpej #define _SH3_MCONTEXT_H_
     34      1.2  thorpej 
     35      1.2  thorpej /*
     36      1.2  thorpej  * Layout of mcontext_t for the sh3 architecture.
     37      1.2  thorpej  */
     38      1.2  thorpej 
     39      1.2  thorpej #define _NGREG		22
     40      1.2  thorpej typedef int		__greg_t;
     41      1.2  thorpej typedef __greg_t	__gregset_t[_NGREG];
     42      1.2  thorpej 
     43      1.7      uwe #define	_REG_GBR	0
     44      1.2  thorpej #define	_REG_PC		1
     45      1.2  thorpej #define	_REG_SR		2
     46      1.2  thorpej #define	_REG_MACL	3
     47      1.2  thorpej #define	_REG_MACH	4
     48      1.2  thorpej #define	_REG_PR		5
     49      1.2  thorpej #define	_REG_R14	6
     50      1.2  thorpej #define	_REG_R13	7
     51      1.2  thorpej #define	_REG_R12	8
     52      1.2  thorpej #define	_REG_R11	9
     53      1.2  thorpej #define	_REG_R10	10
     54      1.2  thorpej #define	_REG_R9		11
     55      1.2  thorpej #define	_REG_R8		12
     56      1.2  thorpej #define	_REG_R7		13
     57      1.2  thorpej #define	_REG_R6		14
     58      1.2  thorpej #define	_REG_R5		15
     59      1.2  thorpej #define	_REG_R4		16
     60      1.2  thorpej #define	_REG_R3		17
     61      1.2  thorpej #define	_REG_R2		18
     62      1.2  thorpej #define	_REG_R1		19
     63      1.2  thorpej #define	_REG_R0		20
     64      1.2  thorpej #define	_REG_R15	21
     65      1.2  thorpej /* Convenience synonym */
     66      1.2  thorpej #define	_REG_SP		_REG_R15
     67      1.2  thorpej 
     68      1.4      uwe /*
     69      1.4      uwe  * FPU state description.
     70      1.4      uwe  * XXX: kernel doesn't support FPU yet, so this is just a placeholder.
     71      1.4      uwe  */
     72      1.2  thorpej typedef struct {
     73      1.2  thorpej 	int		__fpr_fpscr;
     74      1.4      uwe 	int		__fpr_fpul;
     75      1.4      uwe 	/* XXX: redefine as a union when we do support FPU */
     76      1.4      uwe 	int		__fpr_regs[32];	/* SH3E has 16, SH4 has 32 */
     77      1.2  thorpej } __fpregset_t;
     78      1.2  thorpej 
     79      1.2  thorpej typedef struct {
     80      1.2  thorpej 	__gregset_t	__gregs;
     81      1.2  thorpej 	__fpregset_t	__fpregs;
     82      1.2  thorpej } mcontext_t;
     83      1.2  thorpej 
     84      1.2  thorpej #define	_UC_MACHINE_SP(uc)	((uc)->uc_mcontext.__gregs[_REG_SP])
     85      1.3  thorpej #define	_UC_MACHINE_PC(uc)	((uc)->uc_mcontext.__gregs[_REG_PC])
     86      1.3  thorpej #define	_UC_MACHINE_INTRV(uc)	((uc)->uc_mcontext.__gregs[_REG_R0])
     87      1.3  thorpej 
     88      1.3  thorpej #define	_UC_MACHINE_SET_PC(uc, pc)	_UC_MACHINE_PC(uc) = (pc)
     89      1.4      uwe 
     90      1.4      uwe /*
     91      1.4      uwe  * Machine dependent uc_flags
     92      1.4      uwe  */
     93      1.4      uwe #define	_UC_SETSTACK		0x10000
     94      1.4      uwe #define	_UC_CLRSTACK		0x20000
     95  1.9.4.1     yamt #define	_UC_TLSBASE		0x80000
     96      1.4      uwe 
     97      1.9    joerg static __inline void *
     98      1.8    joerg __lwp_getprivate_fast(void)
     99      1.8    joerg {
    100      1.8    joerg 	register void *__gbr;
    101      1.8    joerg 
    102      1.8    joerg 	__asm volatile("stc gbr, %0" : "=r" (__gbr));
    103      1.8    joerg 
    104      1.8    joerg 	return __gbr;
    105      1.8    joerg }
    106      1.2  thorpej 
    107      1.2  thorpej #endif /* !_SH3_MCONTEXT_H_ */
    108