1 /* $NetBSD: frame.h,v 1.21 2009/11/27 03:23:12 rmind 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_ */ 169