text: /*
   * Copyright (c) 2006-2018, RT-Thread Development Team
   *
   * SPDX-License-Identifier: Apache-2.0
   *
   * Change Logs:
   * Date           Author       Notes
   * 2011-09-23     Bernard      first version
   */
  
  #include <rtthread.h>
  #include <rthw.h>
  
  #include "am33xx.h"
  #include "interrupt.h"
  
  #ifdef RT_USING_GDB
  #include "gdb_stub.h"
  #endif
  
  /**
   * @addtogroup AM33XX
   */
  /*@{*/
  
  extern struct rt_thread *rt_current_thread;
  #ifdef RT_USING_FINSH
  extern long list_thread(void);
  #endif
  
  /**
   * this function will show registers of CPU
   *
   * @param regs the registers point
   */
  
  void rt_hw_show_register (struct rt_hw_register *regs)
  {
  	rt_kprintf("Execption:\n");
  	rt_kprintf("r00:0x%08x r01:0x%08x r02:0x%08x r03:0x%08x\n", regs->r0, regs->r1, regs->r2, regs->r3);
  	rt_kprintf("r04:0x%08x r05:0x%08x r06:0x%08x r07:0x%08x\n", regs->r4, regs->r5, regs->r6, regs->r7);
  	rt_kprintf("r08:0x%08x r09:0x%08x r10:0x%08x\n", regs->r8, regs->r9, regs->r10);
  	rt_kprintf("fp :0x%08x ip :0x%08x\n", regs->fp, regs->ip);
  	rt_kprintf("sp :0x%08x lr :0x%08x pc :0x%08x\n", regs->sp, regs->lr, regs->pc);
  	rt_kprintf("cpsr:0x%08x\n", regs->cpsr);
  }
  
  /**
   * When ARM7TDMI comes across an instruction which it cannot handle,
   * it takes the undefined instruction trap.
   *
   * @param regs system registers
   *
   * @note never invoke this function in application
   */
  void rt_hw_trap_udef(struct rt_hw_register *regs)
  {
  
  #ifdef RT_USING_GDB
      regs->pc -= 4; //lr in undef is pc + 4
      if (gdb_undef_hook(regs))
          return;
  #endif
  
  	rt_hw_show_register(regs);
  
  	rt_kprintf("undefined instruction\n");
  	rt_kprintf("thread %.*s stack:\n", RT_NAME_MAX, rt_current_thread->name);
  
  #ifdef RT_USING_FINSH
  	list_thread();
  #endif
  	rt_hw_cpu_shutdown();
  }
  
  /**
   * The software interrupt instruction (SWI) is used for entering
   * Supervisor mode, usually to request a particular supervisor
   * function.
   *
   * @param regs system registers
   *
   * @note never invoke this function in application
   */
  void rt_hw_trap_swi(struct rt_hw_register *regs)
  {
  	rt_hw_show_register(regs);
  
  	rt_kprintf("software interrupt\n");
  	rt_hw_cpu_shutdown();
  }
  
  /**
   * An abort indicates that the current memory access cannot be completed,
   * which occurs during an instruction prefetch.
   *
   * @param regs system registers
   *
   * @note never invoke this function in application
   */
  void rt_hw_trap_pabt(struct rt_hw_register *regs)
  {
  	rt_hw_show_register(regs);
  
  	rt_kprintf("prefetch abort\n");
  	rt_kprintf("thread %.*s stack:\n", RT_NAME_MAX, rt_current_thread->name);
  
  #ifdef RT_USING_FINSH
  	list_thread();
  #endif
  	rt_hw_cpu_shutdown();
  }
  
  /**
   * An abort indicates that the current memory access cannot be completed,
   * which occurs during a data access.
   *
   * @param regs system registers
   *
   * @note never invoke this function in application
   */
  void rt_hw_trap_dabt(struct rt_hw_register *regs)
  {
  
  #ifdef RT_USING_GDB
      if (gdb_mem_fault_handler) {
          regs->pc = (unsigned long)gdb_mem_fault_handler; 
          return;
      }
  #endif
  	rt_hw_show_register(regs);
  
  	rt_kprintf("data abort\n");
  	rt_kprintf("thread %.*s stack:\n", RT_NAME_MAX, rt_current_thread->name);
  
  #ifdef RT_USING_FINSH
  	list_thread();
  #endif
  	rt_hw_cpu_shutdown();
  }
  
  void rt_hw_trap_irq()
  {
      void *param;
  	unsigned long ir;
      rt_isr_handler_t isr_func;
      extern struct rt_irq_desc isr_table[];
  
  	ir = rt_hw_interrupt_get_active(INT_IRQ);
      if (ir == 127)
      {
          /* new IRQ generation */
          rt_hw_interrupt_ack(INT_IRQ);
          ir = rt_hw_interrupt_get_active(INT_IRQ);
          if (ir == 127)
          {
              /* still spurious interrupt, get out */
              /*rt_kprintf("still spurious interrupt\n");*/
              return;
          }
          /*rt_kprintf("new IRQ: %d\n", ir);*/
      }
  
      /* get interrupt service routine */
      isr_func = isr_table[ir].handler;
      param = isr_table[ir].param;
  
      /* turn to interrupt service routine */
      if (isr_func != RT_NULL)
          isr_func(ir, param);
  
  	/* new IRQ generation */
      rt_hw_interrupt_ack(INT_IRQ);
  }
  
  void rt_hw_trap_fiq()
  {
      void *param;
  	unsigned long ir;
      rt_isr_handler_t isr_func;
      extern struct rt_irq_desc isr_table[];
  
  	ir = rt_hw_interrupt_get_active(INT_FIQ);
  
      /* get interrupt service routine */
      isr_func = isr_table[ir].handler;
      param = isr_table[ir].param;
  
      /* turn to interrupt service routine */
      isr_func(ir, param);
  
  	/* new FIQ generation */
      rt_hw_interrupt_ack(INT_FIQ);
  }
  
  /*@}*/
  