xref: /src/sys/arch/mips/include/mcontext.h

/*	$NetBSD: mcontext.h,v 1.1.2.1 2001/11/17 23:12:03 wdk Exp $	*/

/*-
 * Copyright (c) 1999 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Klaus Klein.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *        This product includes software developed by the NetBSD
 *        Foundation, Inc. and its contributors.
 * 4. Neither the name of The NetBSD Foundation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _MIPS_MCONTEXT_H_
#define _MIPS_MCONTEXT_H_

/*
 * Layout of mcontext_t according to the System V Application Binary Interface,
 * MIPS(tm) Processor Supplement, 3rd Edition. (p 6-79)
 */

/*
 * General register state
 */
#define _NGREG		36		/* R0-R31, MDLO, MDHI, CAUSE, PC */
typedef	mips_reg_t	__greg_t;
typedef	__greg_t	__gregset_t[_NGREG];

#define _REG_R0		0
#define _REG_AT		1
#define _REG_V0		2
#define _REG_V1		3
#define _REG_A0		4
#define _REG_A1		5
#define _REG_A2		6
#define _REG_A3		7
#define _REG_T0		8
#define _REG_T1		9
#define _REG_T2		10
#define _REG_T3		11
#define _REG_T4		12
#define _REG_T5		13
#define _REG_T6		14
#define _REG_T7		15
#define _REG_S0		16
#define _REG_S1		17
#define _REG_S2		18
#define _REG_S3		19
#define _REG_S4		20
#define _REG_S5		21
#define _REG_S6		22
#define _REG_S7		23
#define _REG_T8		24
#define _REG_T9		25
#define _REG_K0		26
#define _REG_K1		27
#define _REG_GP		28
#define _REG_SP		29
#define _REG_S8		30
#define _REG_RA		31

/* XXX: The following conflict with <mips/regnum.h> */
#define _REG_MDLO	32
#define _REG_MDHI	33
#define _REG_CAUSE	34
#define _REG_EPC	35

#define _REG_ZERO	_REG_R0

/*
 * Floating point register state
 */
typedef struct {
	union {
		double	__fp_dregs[16];
		float	__fp_fregs[32];
		__greg_t	__fp_regs[32];
	} __fp_r;
	u_int		__fp_csr;
	u_int		__fp_pad;
} __fpregset_t;

typedef struct {
	__gregset_t	__gregs;
	__fpregset_t	__fpregs;
} mcontext_t;

#define _UC_MACHINE_PAD	48	/* Padding appended to ucontext_t */

#endif	/* _MIPS_MCONTEXT_H_ */