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frame.h revision 1.17 
      1 /*	$NetBSD: frame.h,v 1.17 2003/08/27 20:20:08 matt Exp $	*/
      2 
      3 /*
      4  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
      5  * Copyright (C) 1995, 1996 TooLs GmbH.
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by TooLs GmbH.
     19  * 4. The name of TooLs GmbH may not be used to endorse or promote products
     20  *    derived from this software without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
     23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     25  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     26  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     27  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     28  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     29  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     30  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     31  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 #ifndef	_POWERPC_FRAME_H_
     34 #define	_POWERPC_FRAME_H_
     35 
     36 #include <machine/types.h>
     37 
     38 /*
     39  * We have to save all registers on every trap, because
     40  *	1. user could attach this process every time
     41  *	2. we must be able to restore all user registers in case of fork
     42  * Actually, we do not save the fp registers on trap, since
     43  * these are not used by the kernel. They are saved only when switching
     44  * between processes using the FPU.
     45  *
     46  * Change ordering to cluster together these register_t's.		XXX
     47  */
     48 struct utrapframe {
     49 	register_t fixreg[32];
     50 	register_t lr;
     51 	int cr;
     52 	int xer;
     53 	register_t ctr;
     54 	register_t srr0;
     55 	register_t srr1;
     56 	int vrsave;
     57 	int mq;
     58 	int spare;
     59 };
     60 
     61 struct trapframe {
     62 	register_t fixreg[32];
     63 	register_t lr;
     64 	int cr;
     65 	int xer;
     66 	register_t ctr;
     67 	register_t srr0;
     68 	register_t srr1;
     69 	/*
     70 	 * DAR is the OEA name.  On IBM4xx is DAR is really DEAR.
     71 	 */
     72 	register_t dar;		/* dar & dsisr are only filled on a DSI trap */
     73 	int dsisr;
     74 	int exc;
     75 	int tf_xtra[2];
     76 };
     77 #define	TF_VRSAVE	0
     78 #define	TF_MQ		1
     79 #define	TF_ESR		0
     80 #define	TF_PID		1
     81 
     82 #if defined(_KERNEL) || defined(_LKM)
     83 #ifdef _LP64
     84 struct utrapframe32 {
     85 	register32_t fixreg[32];
     86 	register32_t lr;
     87 	int cr;
     88 	int xer;
     89 	register32_t ctr;
     90 	register32_t srr0;
     91 	register32_t srr1;
     92 	int vrsave;
     93 	int mq;
     94 	int spare;
     95 };
     96 #endif
     97 #endif /* _KERNEL || _LKM */
     98 
     99 /*
    100  * This is to ensure alignment of the stackpointer
    101  */
    102 #define	FRAMELEN	roundup(sizeof(struct trapframe) + 2*sizeof(register_t), CALLFRAMELEN)
    103 #define	trapframe(l)	((struct trapframe *)((char *)(l)->l_addr + USPACE - FRAMELEN + 2*sizeof(register_t)))
    104 
    105 #define	SFRAMELEN	roundup(sizeof(struct switchframe), CALLFRAMELEN)
    106 struct switchframe {
    107 	register_t sp;
    108 	register_t lr;
    109 	register_t user_sr;		/* VSID on IBM4XX */
    110 	register_t cr;			/* why?  CR is volatile. */
    111 	register_t fixreg2;
    112 	register_t fixreg[19];		/* R13-R31 */
    113 };
    114 
    115 struct clockframe {
    116 	register_t srr1;
    117 	register_t srr0;
    118 	int pri;
    119 	int depth;
    120 };
    121 
    122 /*
    123  * Call frame for PowerPC used during fork.
    124  */
    125 #define	CALLFRAMELEN	sizeof(struct callframe)
    126 struct callframe {
    127 	register_t sp;
    128 	register_t lr;
    129 	register_t r30;
    130 	register_t r31;
    131 };
    132 
    133 struct saframe {
    134 	register_t r1;		/* stack pointer */
    135 	register_t lr;		/* Callee lr save area */
    136 	register_t fill[2];	/* Pad to multiple of 16 bytes */
    137 };
    138 
    139 #define	IFRAMELEN	roundup(sizeof(struct intrframe), CALLFRAMELEN)
    140 struct intrframe {
    141 	register_t r1;			/*  0 */
    142 	register_t _pad4;		/*  4 */
    143 	/*
    144 	 * The next 4 fields are "clockframe"
    145 	 */
    146 	register_t srr1;		/*  8 */
    147 	register_t srr0;		/* 12 */
    148 	int pri;			/* 16 */
    149 	int intrdepth;			/* 20 */
    150 	register_t pid;			/* 24 */
    151 	register_t ctr;			/* 28 */
    152 	register_t xer;			/* 32 */
    153 	register_t cr;			/* 36 */
    154 	register_t lr;			/* 40 */
    155 	register_t r12;			/* 44 */
    156 	register_t r11;			/* 48 */
    157 	register_t r10;			/* 52 */
    158 	register_t r9;			/* 56 */
    159 	register_t r8;			/* 60 */
    160 	register_t r7;			/* 64 */
    161 	register_t r6;			/* 68 */
    162 	register_t r5;			/* 72 */
    163 	register_t r4;			/* 76 */
    164 	register_t r3;			/* 80 */
    165 	register_t r0;			/* 84 */
    166 };
    167 
    168 #endif	/* _POWERPC_FRAME_H_ */
    169