/*      $NetBSD: cpuframe.h,v 1.11 2026/03/14 21:03:40 thorpej Exp $    */

/*
 * Copyright (c) 1988 University of Utah.
 * Copyright (c) 1982, 1990, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * the Systems Programming Group of the University of Utah Computer
 * Science Department.
 *
 * 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. Neither the name of the University 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 REGENTS 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 REGENTS 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.
 *
 * from: Utah $Hdr: frame.h 1.8 92/12/20$
 *
 *      @(#)frame.h     8.1 (Berkeley) 6/10/93
 */

#ifndef _M68K_CPUFRAME_H_
#define _M68K_CPUFRAME_H_

struct frame {
        struct trapframe {
                int     tf_regs[16];
                short   tf_pad;
                short   tf_stackadj;
                u_short tf_sr;
                u_int   tf_pc __packed;
                struct {
                        u_short /* BITFIELDTYPE */ fv_format:4,
                                /* BITFIELDTYPE */ fv_vector:12;
                } tf_forvec __packed;
        } F_t;
        union F_u {
                struct fmt2 {
                        u_int   f_iaddr;
                } F_fmt2;

                struct fmt3 {
                        u_int   f_ea;
                } F_fmt3;

                struct fmt4 {
                        u_int   f_fa;
                        u_int   f_fslw;
                        /* for 060FP type 4 FP disabled frames: */
#define                 f_fea   f_fa
#define                 f_pcfi  f_fslw
                } F_fmt4;

                struct fmt7 {
                        u_int   f_ea;
                        u_short f_ssw;
                        u_short f_wb3s, f_wb2s, f_wb1s;
                        u_int   f_fa;
                        u_int   f_wb3a, f_wb3d;
                        u_int   f_wb2a, f_wb2d;
                        u_int   f_wb1a, f_wb1d;
#define                         f_pd0 f_wb1d
                        u_int   f_pd1, f_pd2, f_pd3;
                } F_fmt7;

                struct fmt8 {
                        u_short f_ssw;
                        u_int   f_accaddr;
                        u_short f_ir0;
                        u_short f_dob;
                        u_short f_ir1;
                        u_short f_dib;
                        u_short f_ir2;
                        u_short f_irc;
                        u_short f_maskpc;
                        u_short f_iregs[15];
                } __attribute__((packed)) F_fmt8;

                struct fmt9 {
                        u_int   f_iaddr;
                        u_short f_iregs[4];
                } F_fmt9;

                struct fmtA {
                        u_short f_ir0;
                        u_short f_ssw;
                        u_short f_ipsc;
                        u_short f_ipsb;
                        u_int   f_dcfa;
                        u_short f_ir1, f_ir2;
                        u_int   f_dob;
                        u_short f_ir3, f_ir4;
                } F_fmtA;

                struct fmtB {
                        u_short f_ir0;
                        u_short f_ssw;
                        u_short f_ipsc;
                        u_short f_ipsb;
                        u_int   f_dcfa;
                        u_short f_ir1, f_ir2;
                        u_int   f_dob;
                        u_short f_ir3, f_ir4;
                        u_short f_ir5, f_ir6;
                        u_int   f_sba;
                        u_short f_ir7, f_ir8;
                        u_int   f_dib;
                        u_short f_iregs[22];
                } F_fmtB;
        } F_u;
};

#define f_regs          F_t.tf_regs
#define _f_pad          F_t.tf_pad
#define f_stackadj      F_t.tf_stackadj
#define f_sr            F_t.tf_sr
#define f_pc            F_t.tf_pc
#define f_forvec        F_t.tf_forvec
#define f_format        F_t.tf_forvec.fv_format
#define f_vector        F_t.tf_forvec.fv_vector
#define f_fmt2          F_u.F_fmt2
#define f_fmt3          F_u.F_fmt3
#define f_fmt4          F_u.F_fmt4
#define f_fmt7          F_u.F_fmt7
#define f_fmt8          F_u.F_fmt8
#define f_fmt9          F_u.F_fmt9
#define f_fmtA          F_u.F_fmtA
#define f_fmtB          F_u.F_fmtB

#define tf_format       tf_forvec.fv_format
#define tf_vector       tf_forvec.fv_vector

struct switchframe {
        u_int   sf_pc;
};

struct fpframe {
        union FPF_u1 {
                u_int   FPF_null;
                struct {
                        u_char  FPF_version;
                        u_char  FPF_fsize;
                        u_short FPF_res1;
                } FPF_nonnull;
        } FPF_u1;
        union FPF_u2 {
                struct fpidle {
                        u_short fpf_ccr;
                        u_short fpf_res2;
                        u_int   fpf_iregs1[8];
                        u_int   fpf_xops[3];
                        u_int   fpf_opreg;
                        u_int   fpf_biu;
                } FPF_idle;

                struct fpbusy {
                        u_int   fpf_iregs[53];
                } FPF_busy;

                struct fpunimp {
                        u_int   fpf_state[10];
                } FPF_unimp;
        } FPF_u2;
        u_int   fpf_regs[8*3];
        u_int   fpf_fpcr;
        u_int   fpf_fpsr;
        u_int   fpf_fpiar;
};

#define fpf_null        FPF_u1.FPF_null
#define fpf_version     FPF_u1.FPF_nonnull.FPF_version
#define fpf_fsize       FPF_u1.FPF_nonnull.FPF_fsize
#define fpf_res1        FPF_u1.FPF_nonnull.FPF_res1
#define fpf_idle        FPF_u2.FPF_idle
#define fpf_busy        FPF_u2.FPF_busy
#define fpf_unimp       FPF_u2.FPF_unimp

/*
 * This is incompatible with the earlier one; especially, an earlier frame
 * must not be FRESTOREd on a 060 or vv, because a frame error exception is
 * not guaranteed.
 */


struct fpframe060 {
        u_short fpf6_excp_exp;
        u_char  fpf6_frmfmt;

        u_char  fpf6_v;

        u_long  fpf6_upper, fpf6_lower;
};

#endif  /* _M68K_CPUFRAME_H_ */