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frame.h revision 1.23 
      1 /*	$NetBSD: frame.h,v 1.23 2011/06/20 07:31:18 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 #ifdef _KERNEL
     39 #ifdef _KERNEL_OPT
     40 #include "opt_ppcarch.h"
     41 #endif
     42 #endif
     43 
     44 /*
     45  * We have to save all registers on every trap, because
     46  *	1. user could attach this process every time
     47  *	2. we must be able to restore all user registers in case of fork
     48  * Actually, we do not save the fp registers on trap, since
     49  * these are not used by the kernel. They are saved only when switching
     50  * between processes using the FPU.
     51  *
     52  * Change ordering to cluster together these register_t's.		XXX
     53  */
     54 struct reg_sans_pc {
     55 	register_t r_fixreg[32];
     56 	register_t r_lr;
     57 	uint32_t r_cr;
     58 	uint32_t r_xer;
     59 	register_t r_ctr;
     60 };
     61 
     62 struct utrapframe {
     63 	register_t fixreg[32];
     64 	register_t lr;
     65 	int cr;
     66 	int xer;
     67 	register_t ctr;
     68 	register_t srr0;
     69 	register_t srr1;
     70 	int vrsave;
     71 	int mq;
     72 	int spare;
     73 };
     74 
     75 struct clockframe {
     76 	register_t cf_srr0;
     77 	register_t cf_srr1;
     78 	int cf_idepth;
     79 };
     80 
     81 struct trapframe {
     82 	struct reg_sans_pc tf_ureg;
     83 	struct clockframe tf_cf;
     84 	uint32_t tf_exc;
     85 #if defined(PPC_OEA) || defined(PPC_OEA64) || defined(PPC_OEA64_BRIDGE)
     86 	register_t tf_dar;
     87 	register_t tf_pad0[2];
     88 	uint32_t tf_dsisr;
     89 	uint32_t tf_vrsave;
     90 	uint32_t tf_mq;
     91 	uint32_t tf_pad1[1];
     92 #endif
     93 #if defined(PPC_BOOKE) || defined(PPC_IBM4XX)
     94 	register_t tf_dear;
     95 	register_t tf_mcar;
     96 	register_t tf_sprg1;
     97 	uint32_t tf_esr;
     98 	uint32_t tf_mcsr;
     99 	uint32_t tf_pid;
    100 	uint32_t tf_spefscr;
    101 #endif
    102 };
    103 #define tf_fixreg	tf_ureg.r_fixreg
    104 #define tf_lr		tf_ureg.r_lr
    105 #define tf_cr		tf_ureg.r_cr
    106 #define tf_xer		tf_ureg.r_xer
    107 #define tf_ctr		tf_ureg.r_ctr
    108 #define tf_srr0		tf_cf.cf_srr0
    109 #define tf_srr1		tf_cf.cf_srr1
    110 #define tf_idepth	tf_cf.cf_idepth
    111 
    112 struct ktrapframe {
    113 	register_t ktf_sp;
    114 	register_t ktf_lr;
    115 	struct trapframe ktf_tf;
    116 };
    117 
    118 #if defined(_KERNEL) || defined(_LKM)
    119 #ifdef _LP64
    120 struct utrapframe32 {
    121 	register32_t fixreg[32];
    122 	register32_t lr;
    123 	int cr;
    124 	int xer;
    125 	register32_t ctr;
    126 	register32_t srr0;
    127 	register32_t srr1;
    128 	int vrsave;
    129 	int mq;
    130 	int spare;
    131 };
    132 #endif
    133 #endif /* _KERNEL || _LKM */
    134 
    135 /*
    136  * This is to ensure alignment of the stackpointer
    137  */
    138 #define	FRAMELEN	roundup(sizeof(struct ktrapframe), CALLFRAMELEN)
    139 #define	ktrapframe(l)	((struct ktrapframe *)(uvm_lwp_getuarea(l) + USPACE - CALLFRAMELEN - FRAMELEN))
    140 #define	trapframe(l)	(&(ktrapframe(l)->ktf_tf))
    141 
    142 #define	SFRAMELEN	roundup(sizeof(struct switchframe), CALLFRAMELEN)
    143 struct switchframe {
    144 	register_t sf_sp;
    145 	register_t sf_lr;
    146 	register_t sf_user_sr;		/* VSID on IBM4XX */
    147 	register_t sf_cr;		/* why?  CR is volatile. */
    148 	register_t sf_fixreg2;
    149 	register_t sf_fixreg[19];	/* R13-R31 */
    150 };
    151 
    152 /*
    153  * Call frame for PowerPC used during fork.
    154  */
    155 #define	CALLFRAMELEN	sizeof(struct callframe)
    156 struct callframe {
    157 	register_t cf_sp;
    158 	register_t cf_lr;
    159 	register_t cf_r30;
    160 	register_t cf_r31;
    161 };
    162 
    163 struct saframe {
    164 	register_t saf_r1;	/* stack pointer */
    165 	register_t saf_lr;	/* Callee lr save area */
    166 #ifndef _LP64
    167 	register_t saf_fill[2];	/* Pad to multiple of 16 bytes */
    168 #endif
    169 };
    170 
    171 #endif	/* _POWERPC_FRAME_H_ */
    172