frame.h revision 1.6
1 /* $NetBSD: frame.h,v 1.6 2003/10/23 08:59:10 scw Exp $ */ 2 3 /* 4 * Copyright (c) 1994-1997 Mark Brinicombe. 5 * Copyright (c) 1994 Brini. 6 * All rights reserved. 7 * 8 * This code is derived from software written for Brini by Mark Brinicombe 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by Brini. 21 * 4. The name of the company nor the name of the author may be used to 22 * endorse or promote products derived from this software without specific 23 * prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED 26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 28 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 29 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 30 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 31 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * RiscBSD kernel project 38 * 39 * frame.h 40 * 41 * Stack frames structures 42 * 43 * Created : 30/09/94 44 */ 45 46 #ifndef _ARM32_FRAME_H_ 47 #define _ARM32_FRAME_H_ 48 49 #include <arm/frame.h> /* Common ARM stack frames */ 50 51 #ifndef _LOCORE 52 53 /* 54 * System stack frames. 55 */ 56 57 typedef struct irqframe { 58 unsigned int if_spsr; 59 unsigned int if_r0; 60 unsigned int if_r1; 61 unsigned int if_r2; 62 unsigned int if_r3; 63 unsigned int if_r4; 64 unsigned int if_r5; 65 unsigned int if_r6; 66 unsigned int if_r7; 67 unsigned int if_r8; 68 unsigned int if_r9; 69 unsigned int if_r10; 70 unsigned int if_r11; 71 unsigned int if_r12; 72 unsigned int if_usr_sp; 73 unsigned int if_usr_lr; 74 unsigned int if_svc_sp; 75 unsigned int if_svc_lr; 76 unsigned int if_pc; 77 } irqframe_t; 78 79 #define clockframe irqframe 80 81 /* 82 * Switch frame 83 */ 84 85 struct switchframe { 86 u_int sf_r4; 87 u_int sf_r5; 88 u_int sf_r6; 89 u_int sf_r7; 90 u_int sf_pc; 91 }; 92 93 /* 94 * Stack frame. Used during stack traces (db_trace.c) 95 */ 96 struct frame { 97 u_int fr_fp; 98 u_int fr_sp; 99 u_int fr_lr; 100 u_int fr_pc; 101 }; 102 103 #ifdef _KERNEL 104 void validate_trapframe __P((trapframe_t *, int)); 105 #endif /* _KERNEL */ 106 107 #else /* _LOCORE */ 108 109 /* 110 * ASM macros for pushing and pulling trapframes from the stack 111 * 112 * These macros are used to handle the irqframe and trapframe structures 113 * defined above. 114 */ 115 116 /* 117 * PUSHFRAME - macro to push a trap frame on the stack in the current mode 118 * Since the current mode is used, the SVC lr field is not defined. 119 * 120 * NOTE: r13 and r14 are stored separately as a work around for the 121 * SA110 rev 2 STM^ bug 122 */ 123 124 #define PUSHFRAME \ 125 str lr, [sp, #-4]!; /* Push the return address */ \ 126 sub sp, sp, #(4*17); /* Adjust the stack pointer */ \ 127 stmia sp, {r0-r12}; /* Push the user mode registers */ \ 128 add r0, sp, #(4*13); /* Adjust the stack pointer */ \ 129 stmia r0, {r13-r14}^; /* Push the user mode registers */ \ 130 mov r0, r0; /* NOP for previous instruction */ \ 131 mrs r0, spsr_all; /* Put the SPSR on the stack */ \ 132 str r0, [sp, #-4]!; 133 134 /* 135 * PULLFRAME - macro to pull a trap frame from the stack in the current mode 136 * Since the current mode is used, the SVC lr field is ignored. 137 */ 138 139 #define PULLFRAME \ 140 ldr r0, [sp], #0x0004; /* Get the SPSR from stack */ \ 141 msr spsr_all, r0; \ 142 ldmia sp, {r0-r14}^; /* Restore registers (usr mode) */ \ 143 mov r0, r0; /* NOP for previous instruction */ \ 144 add sp, sp, #(4*17); /* Adjust the stack pointer */ \ 145 ldr lr, [sp], #0x0004; /* Pull the return address */ 146 147 /* 148 * PUSHFRAMEINSVC - macro to push a trap frame on the stack in SVC32 mode 149 * This should only be used if the processor is not currently in SVC32 150 * mode. The processor mode is switched to SVC mode and the trap frame is 151 * stored. The SVC lr field is used to store the previous value of 152 * lr in SVC mode. 153 * 154 * NOTE: r13 and r14 are stored separately as a work around for the 155 * SA110 rev 2 STM^ bug 156 */ 157 158 #define PUSHFRAMEINSVC \ 159 stmdb sp, {r0-r3}; /* Save 4 registers */ \ 160 mov r0, lr; /* Save xxx32 r14 */ \ 161 mov r1, sp; /* Save xxx32 sp */ \ 162 mrs r3, spsr; /* Save xxx32 spsr */ \ 163 mrs r2, cpsr; /* Get the CPSR */ \ 164 bic r2, r2, #(PSR_MODE); /* Fix for SVC mode */ \ 165 orr r2, r2, #(PSR_SVC32_MODE); \ 166 msr cpsr_c, r2; /* Punch into SVC mode */ \ 167 mov r2, sp; /* Save SVC sp */ \ 168 str r0, [sp, #-4]!; /* Push return address */ \ 169 str lr, [sp, #-4]!; /* Push SVC lr */ \ 170 str r2, [sp, #-4]!; /* Push SVC sp */ \ 171 msr spsr_all, r3; /* Restore correct spsr */ \ 172 ldmdb r1, {r0-r3}; /* Restore 4 regs from xxx mode */ \ 173 sub sp, sp, #(4*15); /* Adjust the stack pointer */ \ 174 stmia sp, {r0-r12}; /* Push the user mode registers */ \ 175 add r0, sp, #(4*13); /* Adjust the stack pointer */ \ 176 stmia r0, {r13-r14}^; /* Push the user mode registers */ \ 177 mov r0, r0; /* NOP for previous instruction */ \ 178 mrs r0, spsr_all; /* Put the SPSR on the stack */ \ 179 str r0, [sp, #-4]! 180 181 /* 182 * PULLFRAMEFROMSVCANDEXIT - macro to pull a trap frame from the stack 183 * in SVC32 mode and restore the saved processor mode and PC. 184 * This should be used when the SVC lr register needs to be restored on 185 * exit. 186 */ 187 188 #define PULLFRAMEFROMSVCANDEXIT \ 189 ldr r0, [sp], #0x0004; /* Get the SPSR from stack */ \ 190 msr spsr_all, r0; /* restore SPSR */ \ 191 ldmia sp, {r0-r14}^; /* Restore registers (usr mode) */ \ 192 mov r0, r0; /* NOP for previous instruction */ \ 193 add sp, sp, #(4*15); /* Adjust the stack pointer */ \ 194 ldmia sp, {sp, lr, pc}^ /* Restore lr and exit */ 195 196 #endif /* _LOCORE */ 197 198 #endif /* _ARM32_FRAME_H_ */ 199 200 /* End of frame.h */ 201
Indexes created Wed Oct 22 00:09:40 GMT 2025