/* $NetBSD: cpuframe.h,v 1.10 2023/09/26 14:33:55 tsutsui Exp $ */

/* $NetBSD: cpuframe.h,v 1.10 2023/09/26 14:33:55 tsutsui 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;
u_short /* BITFIELDTYPE */ tf_format:4,
/* BITFIELDTYPE */ tf_vector:12;
} 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_stackadj F_t.tf_stackadj
#define f_sr F_t.tf_sr
#define f_pc F_t.tf_pc
#define f_format F_t.tf_format
#define f_vector F_t.tf_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

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_ */