/*      $OpenBSD: reg.h,v 1.7 2014/09/08 01:47:05 guenther Exp $        */
/*      $NetBSD: reg.h,v 1.2 1995/03/28 18:14:07 jtc Exp $      */

/*
 * Copyright (c) 1994, 1995 Carnegie-Mellon University.
 * All rights reserved.
 *
 * Author: Chris G. Demetriou
 * 
 * Permission to use, copy, modify and distribute this software and
 * its documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 * 
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 
 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 * 
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie the
 * rights to redistribute these changes.
 */

#ifndef _MACHINE_REG_H_
#define _MACHINE_REG_H_

/*
 * XXX where did this info come from?
 */

/*
 * Struct reg, used for ptrace and in signal contexts
 * Note that in signal contexts, it's represented as an array.
 * That array has to look exactly like 'struct reg' though.
 */
#define R_V0    0
#define R_T0    1
#define R_T1    2
#define R_T2    3
#define R_T3    4
#define R_T4    5
#define R_T5    6
#define R_T6    7
#define R_T7    8
#define R_S0    9
#define R_S1    10
#define R_S2    11
#define R_S3    12
#define R_S4    13
#define R_S5    14
#define R_S6    15
#define R_A0    16
#define R_A1    17
#define R_A2    18
#define R_A3    19
#define R_A4    20
#define R_A5    21
#define R_T8    22
#define R_T9    23
#define R_T10   24
#define R_T11   25
#define R_RA    26
#define R_T12   27
#define R_AT    28
#define R_GP    29
#define R_SP    30
#define R_ZERO  31

struct reg {
        u_long  r_regs[32];
};

/*
 * Floating point unit state. (also, register set used for ptrace.)
 *
 * The floating point registers for a process, saved only when
 * necessary.
 *
 * Note that in signal contexts, it's represented as an array.
 * That array has to look exactly like 'struct reg' though.
 */
struct fpreg {
        u_long  fpr_regs[32];
        u_long  fpr_cr;
};

#ifdef _KERNEL
void    restorefpstate(struct fpreg *);
void    savefpstate(struct fpreg *);
void    frametoreg(struct trapframe *, struct reg *);
void    regtoframe(struct reg *, struct trapframe *);
#endif

#endif /* _MACHINE_REG_H_ */