frame.h revision 1.4
1 /* $NetBSD: frame.h,v 1.4 2002/10/18 21:32:59 bjh21 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 * Pushed onto the stack at the start of cpu_switch() 84 */ 85 86 struct switchframe { 87 int sf_spl; 88 u_int sf_r4; 89 u_int sf_r5; 90 u_int sf_r6; 91 u_int sf_r7; 92 u_int sf_r8; 93 u_int sf_r9; 94 u_int sf_r10; 95 u_int sf_fp; 96 u_int sf_sp; 97 u_int sf_pc; /* return address from cpu_switch() */ 98 u_int sf_scp; 99 }; 100 101 /* 102 * Stack frame. Used during stack traces (db_trace.c) 103 */ 104 struct frame { 105 u_int fr_fp; 106 u_int fr_sp; 107 u_int fr_lr; 108 u_int fr_pc; 109 }; 110 111 #ifdef _KERNEL 112 void validate_trapframe __P((trapframe_t *, int)); 113 #endif /* _KERNEL */ 114 115 #else /* _LOCORE */ 116 117 /* 118 * ASM macros for pushing and pulling trapframes from the stack 119 * 120 * These macros are used to handle the irqframe and trapframe structures 121 * defined above. 122 */ 123 124 /* 125 * PUSHFRAME - macro to push a trap frame on the stack in the current mode 126 * Since the current mode is used, the SVC lr field is not defined. 127 * 128 * NOTE: r13 and r14 are stored separately as a work around for the 129 * SA110 rev 2 STM^ bug 130 */ 131 132 #define PUSHFRAME \ 133 str lr, [sp, #-4]!; /* Push the return address */ \ 134 sub sp, sp, #(4*17); /* Adjust the stack pointer */ \ 135 stmia sp, {r0-r12}; /* Push the user mode registers */ \ 136 add r0, sp, #(4*13); /* Adjust the stack pointer */ \ 137 stmia r0, {r13-r14}^; /* Push the user mode registers */ \ 138 mov r0, r0; /* NOP for previous instruction */ \ 139 mrs r0, spsr_all; /* Put the SPSR on the stack */ \ 140 str r0, [sp, #-4]!; 141 142 /* 143 * PULLFRAME - macro to pull a trap frame from the stack in the current mode 144 * Since the current mode is used, the SVC lr field is ignored. 145 */ 146 147 #define PULLFRAME \ 148 ldr r0, [sp], #0x0004; /* Get the SPSR from stack */ \ 149 msr spsr_all, r0; \ 150 ldmia sp, {r0-r14}^; /* Restore registers (usr mode) */ \ 151 mov r0, r0; /* NOP for previous instruction */ \ 152 add sp, sp, #(4*17); /* Adjust the stack pointer */ \ 153 ldr lr, [sp], #0x0004; /* Pull the return address */ 154 155 /* 156 * PUSHFRAMEINSVC - macro to push a trap frame on the stack in SVC32 mode 157 * This should only be used if the processor is not currently in SVC32 158 * mode. The processor mode is switched to SVC mode and the trap frame is 159 * stored. The SVC lr field is used to store the previous value of 160 * lr in SVC mode. 161 * 162 * NOTE: r13 and r14 are stored separately as a work around for the 163 * SA110 rev 2 STM^ bug 164 */ 165 166 #define PUSHFRAMEINSVC \ 167 stmdb sp, {r0-r3}; /* Save 4 registers */ \ 168 mov r0, lr; /* Save xxx32 r14 */ \ 169 mov r1, sp; /* Save xxx32 sp */ \ 170 mrs r3, spsr; /* Save xxx32 spsr */ \ 171 mrs r2, cpsr; /* Get the CPSR */ \ 172 bic r2, r2, #(PSR_MODE); /* Fix for SVC mode */ \ 173 orr r2, r2, #(PSR_SVC32_MODE); \ 174 msr cpsr_c, r2; /* Punch into SVC mode */ \ 175 mov r2, sp; /* Save SVC sp */ \ 176 str r0, [sp, #-4]!; /* Push return address */ \ 177 str lr, [sp, #-4]!; /* Push SVC lr */ \ 178 str r2, [sp, #-4]!; /* Push SVC sp */ \ 179 msr spsr_all, r3; /* Restore correct spsr */ \ 180 ldmdb r1, {r0-r3}; /* Restore 4 regs from xxx mode */ \ 181 sub sp, sp, #(4*15); /* Adjust the stack pointer */ \ 182 stmia sp, {r0-r12}; /* Push the user mode registers */ \ 183 add r0, sp, #(4*13); /* Adjust the stack pointer */ \ 184 stmia r0, {r13-r14}^; /* Push the user mode registers */ \ 185 mov r0, r0; /* NOP for previous instruction */ \ 186 mrs r0, spsr_all; /* Put the SPSR on the stack */ \ 187 str r0, [sp, #-4]! 188 189 /* 190 * PULLFRAMEFROMSVCANDEXIT - macro to pull a trap frame from the stack 191 * in SVC32 mode and restore the saved processor mode and PC. 192 * This should be used when the SVC lr register needs to be restored on 193 * exit. 194 */ 195 196 #define PULLFRAMEFROMSVCANDEXIT \ 197 ldr r0, [sp], #0x0004; /* Get the SPSR from stack */ \ 198 msr spsr_all, r0; /* restore SPSR */ \ 199 ldmia sp, {r0-r14}^; /* Restore registers (usr mode) */ \ 200 mov r0, r0; /* NOP for previous instruction */ \ 201 add sp, sp, #(4*15); /* Adjust the stack pointer */ \ 202 ldmia sp, {sp, lr, pc}^ /* Restore lr and exit */ 203 204 #endif /* _LOCORE */ 205 206 #endif /* _ARM32_FRAME_H_ */ 207 208 /* End of frame.h */ 209
Indexes created Tue Sep 23 07:09:52 GMT 2025