Re: [microblaze-uclinux]apparent timeout problems with tftp

[John Williams <jwilliams@xxxxxxxxxxxxxx>]

Hi Leonid,

Leonid wrote:

> > Can you boot a cache-enabled kernel with a direct XMD download (not
>
> via 
>
> > u-boot) - for example with petalinux-jtag-boot script, from your EDK 
> > project directory?
>
> I have actually found the reason for this failure. Spartan-2e I'm using
> doesn't support HW multiplication which is defined in autoconf.h now. I
> kind of knew about that and a long time ago made following change in
> ./board/petalogix/microblaze-auto/config.mk file:
>
> +ifeq (,$(findstring spartan2,$(CONFIG_XILINX_MICROBLAZE0_FAMILY)))
>  ifeq ($(CONFIG_XILINX_MICROBLAZE0_USE_HW_MUL),1)
>          HAS_HARD_MULT := y
>  endif
> +endif

Ah, ok.  I'll see about patching this into PetaLinux.  Spartan2 is 
ancient history but obviously a few people (like yourself) are still 
using it.


> After I have implemented for uClinux kernel same change I've done for
> u-boot, uClinux kernel got booted on my board. And what a speed - it
> just flies! See BogoMIPS for instance:
>
> ........................................
> Calibrating delay loop... 24.78 BogoMIPS
> ........................................
>
> It used to be 10 times less, no kidding!

Yep - caches are really not optional for external memory, and uclinux in 
particular.

> Unfortunately kernel boot fails in the end (while starting
> applications):

[snip]

After all the changes you've been making, I'd recommend a cmoplete "make 
clean dep all" to rebuild everything - libs, apps, kernel, romfs, image, 
everything.

The error you are seeing looks like a budybux build sycnh issue - just 
clean it all out and rebuild will probably fix it.

Regards,

John
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