sys/arch/powerpc/include/frame.h

   1 /*      $NetBSD: frame.h,v 1.20 2008/10/16 04:02:32 wrstuden 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 *)(uvm_lwp_getuarea(l) + 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_ */