[ECOS] Problem while Performing SoftReset when exception occurs

[venkatadri potluri <potluri at cdotb dot ernet dot in>]

i am using MPC860 based board. when ever exception occurs i want to reset
the board.i am generating CYGNUM_HAL_VECTOR_DTLB_MISS exception for
testing.

The problem i am facing is when ever exception occurs control is going to
exception handler and then to _exception_reset, up to here it is OK. While
booting up ecos again control is hanging in cyg_hal_invoke_constuctors().
 if we debug inside cyg_hal_invoke_constuctors(), control path is like
this



Cyg_Exception_Control::Cyg_Exception_Control
                    |
		    |
       cyg_hal_default_exception_vsr
                    |
                    |
        cyg_hal_exception_handler
                    |
		    |
Cyg_Exception_Control::deliver_exception


and control is switching between cyg_hal_exception_handler and
deliver_exception.  i guess  exception was not cleared properly.

so how to clear the  exception or solve this problem..
       

 my code...


static int d0;
externC void exception_init ();
externC void handler(cyg_addrword_t data, cyg_code_t number,
cyg_addrword_t info);

externC
void exception_init ()
{
        cyg_exception_handler_t *old_handler;
        cyg_addrword_t old_data;
    cyg_exception_set_handler(
        CYGNUM_HAL_VECTOR_DTLB_MISS,
        &handler,
        (cyg_addrword_t)&d0,
        &old_handler,
        &old_data);


}

externC
void handler(cyg_addrword_t data, cyg_code_t number, cyg_addrword_t
info)
{


  diag_printf("\nException Number : %d \n",number);

        // Do cleanup of interrupt_handlers
   hal_interrupt_handlers[0] =(CYG_ADDRWORD)hal_default_decrementer_isr;
        for ( int i=1;i<CYGNUM_HAL_ISR_COUNT;i++)
                hal_interrupt_handlers[i] = (CYG_ADDRWORD)hal_default_isr;

       cyg_exception_clear_handler(number);


     // Reset the stack pointer
        asm volatile ("lis 1, __interrupt_stack@h;");
        asm volatile ("ori 1,1,__interrupt_stack@l;");


        // Reboot
        asm volatile ("b __exception_reset;");
        //asm volatile ("b main");


}

thanks in advance


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Venkatadri Potluri
Research Engineer
Center For Development Of Telematics,
Sneha Complex, 71/1,
Miller's Road,
Bangalore-560052.

Phones:
  Office:080-2263399 extn:327,328,2282168.
     Res:080-3535423(pp)
     Fax:080-2263256
   Email:potluri@cdotb.ernet.in
         pvenkatadri@sify.com     	
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~   



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