201 lines
4.5 KiB
C
201 lines
4.5 KiB
C
/*
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* File : trap.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006, RT-Thread Develop Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2011-09-23 Bernard first version
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*/
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#include <rtthread.h>
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#include <rthw.h>
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#include "am33xx.h"
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#include "interrupt.h"
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#ifdef RT_USING_GDB
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#include "gdb_stub.h"
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#endif
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/**
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* @addtogroup AM33XX
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*/
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/*@{*/
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extern struct rt_thread *rt_current_thread;
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#ifdef RT_USING_FINSH
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extern long list_thread(void);
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#endif
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/**
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* this function will show registers of CPU
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*
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* @param regs the registers point
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*/
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void rt_hw_show_register (struct rt_hw_register *regs)
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{
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rt_kprintf("Execption:\n");
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rt_kprintf("r00:0x%08x r01:0x%08x r02:0x%08x r03:0x%08x\n", regs->r0, regs->r1, regs->r2, regs->r3);
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rt_kprintf("r04:0x%08x r05:0x%08x r06:0x%08x r07:0x%08x\n", regs->r4, regs->r5, regs->r6, regs->r7);
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rt_kprintf("r08:0x%08x r09:0x%08x r10:0x%08x\n", regs->r8, regs->r9, regs->r10);
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rt_kprintf("fp :0x%08x ip :0x%08x\n", regs->fp, regs->ip);
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rt_kprintf("sp :0x%08x lr :0x%08x pc :0x%08x\n", regs->sp, regs->lr, regs->pc);
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rt_kprintf("cpsr:0x%08x\n", regs->cpsr);
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}
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/**
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* When ARM7TDMI comes across an instruction which it cannot handle,
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* it takes the undefined instruction trap.
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*
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* @param regs system registers
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*
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* @note never invoke this function in application
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*/
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void rt_hw_trap_udef(struct rt_hw_register *regs)
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{
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#ifdef RT_USING_GDB
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regs->pc -= 4; //lr in undef is pc + 4
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if (gdb_undef_hook(regs))
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return;
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#endif
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rt_hw_show_register(regs);
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rt_kprintf("undefined instruction\n");
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rt_kprintf("thread %.*s stack:\n", RT_NAME_MAX, rt_current_thread->name);
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#ifdef RT_USING_FINSH
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list_thread();
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#endif
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rt_hw_cpu_shutdown();
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}
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/**
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* The software interrupt instruction (SWI) is used for entering
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* Supervisor mode, usually to request a particular supervisor
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* function.
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*
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* @param regs system registers
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*
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* @note never invoke this function in application
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*/
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void rt_hw_trap_swi(struct rt_hw_register *regs)
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{
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rt_hw_show_register(regs);
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rt_kprintf("software interrupt\n");
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rt_hw_cpu_shutdown();
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}
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/**
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* An abort indicates that the current memory access cannot be completed,
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* which occurs during an instruction prefetch.
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*
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* @param regs system registers
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*
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* @note never invoke this function in application
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*/
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void rt_hw_trap_pabt(struct rt_hw_register *regs)
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{
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rt_hw_show_register(regs);
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rt_kprintf("prefetch abort\n");
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rt_kprintf("thread %.*s stack:\n", RT_NAME_MAX, rt_current_thread->name);
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#ifdef RT_USING_FINSH
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list_thread();
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#endif
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rt_hw_cpu_shutdown();
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}
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/**
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* An abort indicates that the current memory access cannot be completed,
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* which occurs during a data access.
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*
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* @param regs system registers
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*
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* @note never invoke this function in application
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*/
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void rt_hw_trap_dabt(struct rt_hw_register *regs)
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{
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#ifdef RT_USING_GDB
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if (gdb_mem_fault_handler) {
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regs->pc = (unsigned long)gdb_mem_fault_handler;
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return;
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}
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#endif
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rt_hw_show_register(regs);
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rt_kprintf("data abort\n");
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rt_kprintf("thread %.*s stack:\n", RT_NAME_MAX, rt_current_thread->name);
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#ifdef RT_USING_FINSH
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list_thread();
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#endif
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rt_hw_cpu_shutdown();
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}
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void rt_hw_trap_irq()
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{
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void *param;
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unsigned long ir;
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rt_isr_handler_t isr_func;
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extern struct rt_irq_desc isr_table[];
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ir = rt_hw_interrupt_get_active(INT_IRQ);
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if (ir == 127)
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{
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/* new IRQ generation */
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rt_hw_interrupt_ack(INT_IRQ);
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ir = rt_hw_interrupt_get_active(INT_IRQ);
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if (ir == 127)
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{
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/* still spurious interrupt, get out */
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/*rt_kprintf("still spurious interrupt\n");*/
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return;
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}
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/*rt_kprintf("new IRQ: %d\n", ir);*/
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}
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/* get interrupt service routine */
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isr_func = isr_table[ir].handler;
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param = isr_table[ir].param;
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/* turn to interrupt service routine */
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if (isr_func != RT_NULL)
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isr_func(ir, param);
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/* new IRQ generation */
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rt_hw_interrupt_ack(INT_IRQ);
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}
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void rt_hw_trap_fiq()
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{
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void *param;
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unsigned long ir;
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rt_isr_handler_t isr_func;
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extern struct rt_irq_desc isr_table[];
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ir = rt_hw_interrupt_get_active(INT_FIQ);
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/* get interrupt service routine */
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isr_func = isr_table[ir].handler;
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param = isr_table[ir].param;
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/* turn to interrupt service routine */
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isr_func(ir, param);
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/* new FIQ generation */
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rt_hw_interrupt_ack(INT_FIQ);
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}
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/*@}*/
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