Re: [ECOS] exception when calling reset_platform

["Roland Caßebohm" <roland.cassebohm@visionsystems.de>]

On Thursday, 13. June 2002 19:16, Iztok Zupet wrote:
> On Thursday 13 June 2002 18:20, Roland Caßebohm wrote:
> > Hi,
> >
> > my ARM7TDMI (SNDS100 Board) makes an abort prefetch exception when the
> > application calls reset_platform().
> >
> > I added two nop's because I thought the processor prefetches the
> > init_done value, but this doesn't help:
> >
> > ----------
> >         .global reset_platform
> >         .type   reset_platform,function
> > reset_platform:
> > #ifdef CYGSEM_HAL_ROM_MONITOR
> >         // initialize CPSR (machine state register)
> >         mov
> > r0,#(CPSR_IRQ_DISABLE|CPSR_FIQ_DISABLE|CPSR_SUPERVISOR_MODE) msr
> > cpsr,r0
> >         b       warm_reset
> > #else
> >         mov     r0,#0
> >         mov     pc,r0           // Jump to reset vector
> >         //roland
> >         mov     r0,r0           // nop
> >         mov     r0,r0           // nop
> > #endif
> >
> > init_done:
> >         .long   0xDEADB00B
> > ----------
> >
> > Does anybody know what's wrong?
> >
> > Roland
>
> Hi:
>
>   Looks like that the abort prefetch hapens somewhere else, not in the code
> You've sent. Take a look at the reset vector and the code that executes
> there ( if it is in RAM). It may be corrupt for some reason. Anyhow, can
> You figure out the address of the exeption?
>
> iz

The exception seems to be at 0x31638:

void vs_reboot(void)
{
   
    ...

   31638:       ebffbb55        bl      20394 <reset_platform>
}
   3163c:       e91ba800        ldmdb   r11, {r11, sp, pc}


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