/* $NetBSD: frame.h,v 1.6 1998/11/25 13:09:14 mycroft Exp $ */ /* * Copyright (c) 1994-1997 Mark Brinicombe. * Copyright (c) 1994 Brini. * All rights reserved. * * This code is derived from software written for Brini by Mark Brinicombe * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Brini. * 4. The name of the company nor the name of the author may be used to * endorse or promote products derived from this software without specific * prior written permission. * * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * RiscBSD kernel project * * frame.h * * Stack frames structures * * Created : 30/09/94 */ #ifndef _ARM32_FRAME_H_ #define _ARM32_FRAME_H_ #ifndef _LOCORE #include /* * System stack frames. */ typedef struct irqframe { unsigned int if_spsr; unsigned int if_r0; unsigned int if_r1; unsigned int if_r2; unsigned int if_r3; unsigned int if_r4; unsigned int if_r5; unsigned int if_r6; unsigned int if_r7; unsigned int if_r8; unsigned int if_r9; unsigned int if_r10; unsigned int if_r11; unsigned int if_r12; unsigned int if_usr_sp; unsigned int if_usr_lr; unsigned int if_svc_sp; unsigned int if_svc_lr; unsigned int if_pc; } irqframe_t; #define clockframe irqframe typedef struct trapframe { unsigned int tf_spsr; unsigned int tf_r0; unsigned int tf_r1; unsigned int tf_r2; unsigned int tf_r3; unsigned int tf_r4; unsigned int tf_r5; unsigned int tf_r6; unsigned int tf_r7; unsigned int tf_r8; unsigned int tf_r9; unsigned int tf_r10; unsigned int tf_r11; unsigned int tf_r12; unsigned int tf_usr_sp; unsigned int tf_usr_lr; unsigned int tf_svc_sp; unsigned int tf_svc_lr; unsigned int tf_pc; } trapframe_t; /* * Signal frame */ struct sigframe { int sf_signum; int sf_code; struct sigcontext *sf_scp; sig_t sf_handler; struct sigcontext sf_sc; }; /* * Switch frame */ struct switchframe { int sf_spl; u_int sf_r4; u_int sf_r5; u_int sf_r6; u_int sf_r7; u_int sf_pc; }; /* * Stack frame. Used during stack traces (db_trace.c) */ struct frame { u_int fr_fp; u_int fr_sp; u_int fr_lr; u_int fr_pc; }; #ifdef _KERNEL void validate_trapframe __P((trapframe_t *, int)); #endif /* _KERNEL */ #else /* _LOCORE */ /* * ASM macros for pushing and pulling trapframes from the stack * * These macros are used to handle the irqframe and trapframe structures * defined above. */ /* * PUSHFRAME - macro to push a trap frame on the stack in the current mode * Since the current mode is used, the SVC lr field is not defined. * * NOTE: r13 and r14 are stored separately as a work around for the * SA110 rev 2 STM^ bug */ #define PUSHFRAME \ str lr, [sp, #-4]!; /* Push the return address */ \ sub sp, sp, #(4*17); /* Adjust the stack pointer */ \ stmia sp, {r0-r12}; /* Push the user mode registers */ \ add r0, sp, #(4*13); /* Adjust the stack pointer */ \ stmia r0, {r13-r14}^; /* Push the user mode registers */ \ mov r0, r0; /* NOP for previous instruction */ \ mrs r0, spsr_all; /* Put the SPSR on the stack */ \ str r0, [sp, #-4]!; /* * PULLFRAME - macro to pull a trap frame from the stack in the current mode * Since the current mode is used, the SVC lr field is ignored. */ #define PULLFRAME \ ldr r0, [sp], #0x0004; /* Get the SPSR from stack */ \ msr spsr_all, r0; \ ldmia sp, {r0-r14}^; /* Restore registers (usr mode) */ \ mov r0, r0; /* NOP for previous instruction */ \ add sp, sp, #(4*17); /* Adjust the stack pointer */ \ ldr lr, [sp], #0x0004; /* Pull the return address */ /* * PUSHFRAMEINSVC - macro to push a trap frame on the stack in SVC32 mode * This should only be used if the processor is not currently in SVC32 * mode. The processor mode is switched to SVC mode and the trap frame is * stored. The SVC lr field is used to store the previous value of * lr in SVC mode. * * NOTE: r13 and r14 are stored separately as a work around for the * SA110 rev 2 STM^ bug */ #define PUSHFRAMEINSVC \ stmdb sp, {r0-r3}; /* Save 4 registers */ \ mov r0, lr; /* Save xxx32 r14 */ \ mov r1, sp; /* Save xxx32 sp */ \ mrs r3, spsr_all; /* Save xxx32 spsr */ \ mrs r2, cpsr_all; /* Get the CPSR */ \ bic r2, r2, #(PSR_MODE); /* Fix for SVC mode */ \ orr r2, r2, #(PSR_SVC32_MODE); \ msr cpsr_all, r2; /* Punch into SVC mode */ \ mov r2, sp; /* Save SVC sp */ \ str r0, [sp, #-4]!; /* Push return address */ \ str lr, [sp, #-4]!; /* Push SVC lr */ \ str r2, [sp, #-4]!; /* Push SVC sp */ \ msr spsr_all, r3; /* Restore correct spsr */ \ ldmdb r1, {r0-r3}; /* Restore 4 regs from xxx mode */ \ sub sp, sp, #(4*15); /* Adjust the stack pointer */ \ stmia sp, {r0-r12}; /* Push the user mode registers */ \ add r0, sp, #(4*13); /* Adjust the stack pointer */ \ stmia r0, {r13-r14}^; /* Push the user mode registers */ \ mov r0, r0; /* NOP for previous instruction */ \ mrs r0, spsr_all; /* Put the SPSR on the stack */ \ str r0, [sp, #-4]! /* * PULLFRAMEFROMSVCANDEXIT - macro to pull a trap frame from the stack * in SVC32 mode and restore the saved processor mode and PC. * This should be used when the SVC lr register needs to be restored on * exit. */ #define PULLFRAMEFROMSVCANDEXIT \ ldr r0, [sp], #0x0004; /* Get the SPSR from stack */ \ msr spsr_all, r0; /* restore SPSR */ \ ldmia sp, {r0-r14}^; /* Restore registers (usr mode) */ \ mov r0, r0; /* NOP for previous instruction */ \ add sp, sp, #(4*15); /* Adjust the stack pointer */ \ ldmia sp, {sp, lr, pc}^ /* Restore lr and exit */ #endif _LOCORE #endif /* _ARM32_FRAME_H_ */ /* End of frame.h */