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frame.h revision 1.1 
      1 /*	$NetBSD: frame.h,v 1.1 2002/12/09 12:16:03 scw 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	_MACHINE_FRAME_H_
     34 #define	_MACHINE_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 trapframe {
     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 	register_t dear;			/* dar & dsisr are only filled on a DSI trap */
     57 	int esr;
     58 	int exc;
     59   	int pid;
     60 };
     61 /*
     62  * This is to ensure alignment of the stackpointer
     63  */
     64 #define	FRAMELEN	roundup(sizeof(struct trapframe) + 8, 16)
     65 #define	trapframe(p)	((struct trapframe *)((char *)(p)->p_addr + USPACE - FRAMELEN + 8))
     66 
     67 struct switchframe {
     68 	register_t sp;
     69 	int fill;
     70 	int user_vsid;
     71 	int cr;
     72 	register_t fixreg2;
     73 	register_t fixreg[19];		/* R13-R31 */
     74 };
     75 
     76 struct clockframe {
     77 	register_t srr1;
     78 	register_t srr0;
     79 	int pri;
     80 	int depth;
     81 };
     82 
     83 /*
     84  * Call frame for PowerPC used during fork.
     85  */
     86 struct callframe {
     87 	register_t sp;
     88 	register_t lr;
     89 	register_t r30;
     90 	register_t r31;
     91 };
     92 
     93 #endif	/* _MACHINE_FRAME_H_ */
     94