This is the mail archive of the
ecos-discuss@sources.redhat.com
mailing list for the eCos project.
Re: exception when calling reset_platform
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}
--
Before posting, please read the FAQ: http://sources.redhat.com/fom/ecos
and search the list archive: http://sources.redhat.com/ml/ecos-discuss