/*      $NetBSD: mcontext.h,v 1.16 2024/11/30 01:04:11 christos Exp $   */

/*-
 * Copyright (c) 2001 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.
 *
 * 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 _M68K_MCONTEXT_H_
#define _M68K_MCONTEXT_H_

#ifdef _KERNEL
#include <m68k/cpuframe.h>
#endif

/*
 * mcontext extensions to handle signal delivery.
 */
#define _UC_SETSTACK    _UC_MD_BIT16
#define _UC_CLRSTACK    _UC_MD_BIT17

/*
 * General register state
 */
#define _NGREG          18
typedef int             __greg_t;
typedef __greg_t        __gregset_t[_NGREG];

#define _REG_D0 0
#define _REG_D1 1
#define _REG_D2 2
#define _REG_D3 3
#define _REG_D4 4
#define _REG_D5 5
#define _REG_D6 6
#define _REG_D7 7
#define _REG_A0 8
#define _REG_A1 9
#define _REG_A2 10
#define _REG_A3 11
#define _REG_A4 12
#define _REG_A5 13
#define _REG_A6 14
#define _REG_A7 15
#define _REG_PC 16
#define _REG_PS 17

typedef struct {
        int     __fp_pcr;
        int     __fp_psr;
        int     __fp_piaddr;
        int     __fp_fpregs[8*3];
} __fpregset_t;

typedef struct {
        __gregset_t     __gregs;        /* General Register set */
        __fpregset_t    __fpregs;       /* Floating Point Register set */
        union {
                long    __mc_state[201];        /* Only need 308 bytes... */
#if defined(_KERNEL) || defined(__M68K_MCONTEXT_PRIVATE)
                struct {
                        /* Rest of the frame. */
                        unsigned int    __mcf_format;
                        unsigned int    __mcf_vector;
                        union F_u       __mcf_exframe;
                        /* Rest of the FPU frame. */
                        union FPF_u1    __mcf_fpf_u1;
                        union FPF_u2    __mcf_fpf_u2;
                } __mc_frame;
#endif /* _KERNEL || __M68K_MCONTEXT_PRIVATE */
        }               __mc_pad;
        __greg_t        _mc_tlsbase;
} mcontext_t;

/* Note: no additional padding is to be performed in ucontext_t. */

/* Machine-specific uc_flags value */
#define _UC_M68K_UC_USER _UC_MD_BIT30
#define _UC_TLSBASE     _UC_MD_BIT19

#define _UC_MACHINE_SP(uc)      ((uc)->uc_mcontext.__gregs[_REG_A7])
#define _UC_MACHINE_FP(uc)      ((uc)->uc_mcontext.__gregs[_REG_A6])
#define _UC_MACHINE_PC(uc)      ((uc)->uc_mcontext.__gregs[_REG_PC])
#define _UC_MACHINE_INTRV(uc)   ((uc)->uc_mcontext.__gregs[_REG_D0])

#define _UC_MACHINE_SET_PC(uc, pc)      _UC_MACHINE_PC(uc) = (pc)

#define __UCONTEXT_SIZE 1024

#endif  /* !_M68K_MCONTEXT_H_ */