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/* $OpenBSD: frame.h,v 1.2 1996/07/29 22:58:47 niklas Exp $ */
/* $NetBSD: frame.h,v 1.1 1995/02/13 23:07:39 cgd 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 _ALPHA_FRAME_H_
#define _ALPHA_FRAME_H_
/*
* XXX where did this info come from?
*/
/*
* Trap and syscall frame.
*
* Hardware puts fields marked "[HW]" on stack. We have to add
* all of the general-purpose registers except for zero, for sp,
* which is automatically saved in usp for traps, and implicitly
* saved for syscalls, and for a0-a2, which are saved by hardware.
*/
/* Number of registers saved, including padding. */
#define FRAME_NSAVEREGS 28
/* The offsets of the registers to be saved, into the array. */
#define FRAME_V0 0
#define FRAME_T0 1
#define FRAME_T1 2
#define FRAME_T2 3
#define FRAME_T3 4
#define FRAME_T4 5
#define FRAME_T5 6
#define FRAME_T6 7
#define FRAME_T7 8
#define FRAME_S0 9
#define FRAME_S1 10
#define FRAME_S2 11
#define FRAME_S3 12
#define FRAME_S4 13
#define FRAME_S5 14
#define FRAME_S6 15
#define FRAME_A3 16
#define FRAME_A4 17
#define FRAME_A5 18
#define FRAME_T8 19
#define FRAME_T9 20
#define FRAME_T10 21
#define FRAME_T11 22
#define FRAME_RA 23
#define FRAME_T12 24
#define FRAME_AT 25
#define FRAME_SP 26
#define FRAME_SPARE 27 /* spare; padding */
struct trapframe {
u_int64_t tf_regs[FRAME_NSAVEREGS]; /* GPRs (listed above) */
u_int64_t tf_ps; /* processor status [HW] */
u_int64_t tf_pc; /* program counter [HW] */
u_int64_t tf_gp; /* global pointer [HW] */
u_int64_t tf_a0; /* saved a0 [HW] */
u_int64_t tf_a1; /* saved a1 [HW] */
u_int64_t tf_a2; /* saved a2 [HW] */
};
#endif /* _ALPHA_FRAME_H_ */
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