Exemplos de i386_get_info_from_IDTR em C++ (Cpp)

Exemplo n.º 1

void connect_rdbg_exception()
{
    interrupt_gate_descriptor	 *currentIdtEntry;
    unsigned			 limit;
    unsigned			 level;

    /*
     *  Connect the Exception used to debug
     */
    i386_get_info_from_IDTR (&currentIdtEntry, &limit);

    _CPU_ISR_Disable(level);
    create_interrupt_gate_descriptor (&currentIdtEntry[50], rtems_exception_prologue_50);
    _CPU_ISR_Enable(level);

    old_currentExcHandler = _currentExcHandler;
    _currentExcHandler = BreakPointExcHdl ;

}

Exemplo n.º 2

Arquivo: irq_init.c Projeto: AlexShiLucky/rtems

void  rtems_irq_mngt_init(void)
{
    int 			i;
    interrupt_gate_descriptor* 	idt_entry_tbl;
    unsigned int                limit;
    rtems_interrupt_level       level;

    i386_get_info_from_IDTR(&idt_entry_tbl, &limit);

    /* Convert into number of entries */
    limit = (limit + 1)/sizeof(interrupt_gate_descriptor);

    if(limit != IDT_SIZE) {
       printk("IDT table size mismatch !!! System locked\n");
       while(1);
    }

    rtems_interrupt_disable(level);

    /*
     * Init the complete IDT vector table with defaultRawIrq value
     */
    for (i = 0; i < IDT_SIZE ; i++) {
      idtHdl[i] 	 = defaultRawIrq;
      idtHdl[i].idtIndex = i;
    }

    raw_initial_config.idtSize = IDT_SIZE;
    raw_initial_config.defaultRawEntry = defaultRawIrq;
    raw_initial_config.rawIrqHdlTbl = idtHdl;

    if (!i386_init_idt (&raw_initial_config)) {
      /*
       * put something here that will show the failure...
       */
      printk("Unable to initialize IDT!!! System locked\n");
      while (1);
    }
    /*
     * Patch the entry that will be used by RTEMS for interrupt management
     * with RTEMS prologue.
     */
    for (i = 0; i < BSP_IRQ_LINES_NUMBER; i++) {
      create_interrupt_gate_descriptor(&idtEntry, rtemsIrq[i]);
      idt_entry_tbl[i + BSP_ASM_IRQ_VECTOR_BASE] = idtEntry;
    }
    /*
     * At this point we have completed the initialization of IDT
     * with raw handlers.  We must now initialize the higher level
     * interrupt management.
     */

    /*
     * Init initial Interrupt management config
     */
    bsp_interrupt_initialize();

    /*
     * #define DEBUG
     */
#ifdef DEBUG
    {
      /*
       * following adresses should be the same
       */
      unsigned tmp;

      printk("idt_entry_tbl =  %x Interrupt_descriptor_table addr = %x\n",
	     idt_entry_tbl, &Interrupt_descriptor_table);
      tmp = (unsigned) get_hdl_from_vector (BSP_ASM_IRQ_VECTOR_BASE + BSP_PERIODIC_TIMER);
      printk("clock isr address from idt = %x should be %x\n",
	     tmp, (unsigned) rtems_irq_prologue_0);
    }
    printk("i8259s_cache = %x\n", * (unsigned short*) &i8259s_cache);
    BSP_wait_polled_input();
#endif
}