[ECOS] why memcpy fails.

[ECOS] why memcpy fails.

[Mynampati, Venkata S.]

Hi,
my redboot stops while trying to execute memcpy in strata.c.
I get this message on screen: $T0a0f: 48350200; 0d; 10c800a0; #7c.

from earlier posts i understood that the above message means that
instruction @00023548 gave me an error and this corresponds to
   23548:       848c3004        strhi   r3, [ip], #4
from this i gather that while trying to write it failed.

Now, my doubt is :
1> Why it failed?
2> What address it is trying to write when it failed?( a000c810?)
3> has it anything to do with scrubbing sdram? ( 80310 chipset)

the code is running on xscale board.

Rgds
Venkat

Re: [ECOS] why memcpy fails.

[Jonathan Larmour]

"Mynampati, Venkata S." wrote:
> 
> Hi,
> my redboot stops while trying to execute memcpy in strata.c.
> I get this message on screen: $T0a0f: 48350200; 0d; 10c800a0; #7c.
> 
> from earlier posts i understood that the above message means that
> instruction @00023548 gave me an error and this corresponds to
>    23548:       848c3004        strhi   r3, [ip], #4
> from this i gather that while trying to write it failed.
> 
> Now, my doubt is :
> 1> Why it failed?

At a guess it was loading an image from flash into memory, and got an
exception at some memory address. Check the memory addresses and ranges are
all valid.

> 2> What address it is trying to write when it failed?( a000c810?)

Don't know.

> 3> has it anything to do with scrubbing sdram? ( 80310 chipset)

Pass.
 
> the code is running on xscale board.

Jifl
-- 
Red Hat, Rustat House, Clifton Road, Cambridge, UK. Tel: +44 (1223) 271062
Maybe this world is another planet's Hell -Aldous Huxley || Opinions==mine

RE: [ECOS] why memcpy fails.

[Mynampati, Venkata S.]

> > from earlier posts i understood that the above message means that
> > instruction @00023548 gave me an error and this corresponds to
> >    23548:       848c3004        strhi   r3, [ip], #4
> > from this i gather that while trying to write it failed.
> > 
> > Now, my doubt is :
> > 1> Why it failed?
> 
> At a guess it was loading an image from flash into memory, and got an
> exception at some memory address. Check the memory addresses 
> and ranges are
> all valid.

Thanks, your suggestion worked. I have changed CYGMEM_REGION_ram from
32MB to 64 MB,without appropriately changing the code in 
hal_platform_setup.h( for scrubing 64MB instead of 32... i don't
have i2C discovery), so the work_space got messed up.

Best Regards
Venkat