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frame.h revision 1.3.2.1 
      1 /* $NetBSD: frame.h,v 1.3.2.1 1997/06/01 04:12:17 cgd Exp $ */
      2 
      3 /*
      4  * Copyright (c) 1994, 1995 Carnegie-Mellon University.
      5  * All rights reserved.
      6  *
      7  * Author: Chris G. Demetriou
      8  *
      9  * Permission to use, copy, modify and distribute this software and
     10  * its documentation is hereby granted, provided that both the copyright
     11  * notice and this permission notice appear in all copies of the
     12  * software, derivative works or modified versions, and any portions
     13  * thereof, and that both notices appear in supporting documentation.
     14  *
     15  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     16  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     17  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     18  *
     19  * Carnegie Mellon requests users of this software to return to
     20  *
     21  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     22  *  School of Computer Science
     23  *  Carnegie Mellon University
     24  *  Pittsburgh PA 15213-3890
     25  *
     26  * any improvements or extensions that they make and grant Carnegie the
     27  * rights to redistribute these changes.
     28  */
     29 
     30 #ifndef _ALPHA_FRAME_H_
     31 #define	_ALPHA_FRAME_H_
     32 
     33 #include <machine/alpha_cpu.h>
     34 
     35 /*
     36  * Software trap, exception, and syscall frame.
     37  *
     38  * Includes "hardware" (PALcode) frame.
     39  *
     40  * PALcode puts ALPHA_HWFRAME_* fields on stack.  We have to add
     41  * all of the general-purpose registers except for zero, for sp
     42  * (which is automatically saved in the PCB's USP field for entries
     43  * from user mode, and which is implicitly saved and restored by the
     44  * calling conventions for entries from kernel mode), and (on traps
     45  * and exceptions) for a0, a1, and a2 (which are saved by PALcode).
     46  */
     47 
     48 /* Quadword offsets of the registers to be saved. */
     49 #define	FRAME_V0	0
     50 #define	FRAME_T0	1
     51 #define	FRAME_T1	2
     52 #define	FRAME_T2	3
     53 #define	FRAME_T3	4
     54 #define	FRAME_T4	5
     55 #define	FRAME_T5	6
     56 #define	FRAME_T6	7
     57 #define	FRAME_T7	8
     58 #define	FRAME_S0	9
     59 #define	FRAME_S1	10
     60 #define	FRAME_S2	11
     61 #define	FRAME_S3	12
     62 #define	FRAME_S4	13
     63 #define	FRAME_S5	14
     64 #define	FRAME_S6	15
     65 #define	FRAME_A3	16
     66 #define	FRAME_A4	17
     67 #define	FRAME_A5	18
     68 #define	FRAME_T8	19
     69 #define	FRAME_T9	20
     70 #define	FRAME_T10	21
     71 #define	FRAME_T11	22
     72 #define	FRAME_RA	23
     73 #define	FRAME_T12	24
     74 #define	FRAME_AT	25
     75 #define	FRAME_SP	26
     76 
     77 #define	FRAME_SW_SIZE	(FRAME_SP + 1)
     78 #define	FRAME_HW_OFFSET	FRAME_SW_SIZE
     79 
     80 #define	FRAME_PS	(FRAME_HW_OFFSET + ALPHA_HWFRAME_PS)
     81 #define	FRAME_PC	(FRAME_HW_OFFSET + ALPHA_HWFRAME_PC)
     82 #define	FRAME_GP	(FRAME_HW_OFFSET + ALPHA_HWFRAME_GP)
     83 #define	FRAME_A0	(FRAME_HW_OFFSET + ALPHA_HWFRAME_A0)
     84 #define	FRAME_A1	(FRAME_HW_OFFSET + ALPHA_HWFRAME_A1)
     85 #define	FRAME_A2	(FRAME_HW_OFFSET + ALPHA_HWFRAME_A2)
     86 
     87 #define	FRAME_HW_SIZE	ALPHA_HWFRAME_SIZE
     88 #define	FRAME_SIZE	(FRAME_HW_OFFSET + FRAME_HW_SIZE)
     89 
     90 struct trapframe {
     91 	unsigned long	tf_regs[FRAME_SIZE];	/* See above */
     92 };
     93 
     94 #endif /* _ALPHA_FRAME_H_ */
     95