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/* $FreeBSD$ */
/* From: NetBSD: frame.h,v 1.4 1997/04/06 08:47:27 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_
#include <machine/alpha_cpu.h>
/*
* Software trap, exception, and syscall frame.
*
* Includes "hardware" (PALcode) frame.
*
* PALcode puts ALPHA_HWFRAME_* fields on stack. We have to add
* all of the general-purpose registers except for zero, for sp
* (which is automatically saved in the PCB's USP field for entries
* from user mode, and which is implicitly saved and restored by the
* calling conventions for entries from kernel mode), and (on traps
* and exceptions) for a0, a1, and a2 (which are saved by PALcode).
*/
/* Quadword offsets of the registers to be saved. */
#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
/* The following are set only when a signal is to be delivered to a process. */
#define FRAME_TRAPARG_A0 27
#define FRAME_TRAPARG_A1 28
#define FRAME_TRAPARG_A2 29
/* this is a flag area to see whether we need to restore all registers */
#define FRAME_FLAGS 30
#define FRAME_SW_SIZE (FRAME_FLAGS + 1)
#define FRAME_HW_OFFSET FRAME_SW_SIZE
#define FRAME_FLAGS_SYSCALL 0x1
#define FRAME_PS (FRAME_HW_OFFSET + ALPHA_HWFRAME_PS)
#define FRAME_PC (FRAME_HW_OFFSET + ALPHA_HWFRAME_PC)
#define FRAME_GP (FRAME_HW_OFFSET + ALPHA_HWFRAME_GP)
#define FRAME_A0 (FRAME_HW_OFFSET + ALPHA_HWFRAME_A0)
#define FRAME_A1 (FRAME_HW_OFFSET + ALPHA_HWFRAME_A1)
#define FRAME_A2 (FRAME_HW_OFFSET + ALPHA_HWFRAME_A2)
#define FRAME_HW_SIZE ALPHA_HWFRAME_SIZE
#define FRAME_SIZE (FRAME_HW_OFFSET + FRAME_HW_SIZE)
struct trapframe {
unsigned long tf_regs[FRAME_SIZE]; /* See above */
};
#endif /* _ALPHA_FRAME_H_ */
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