Re: [microblaze-uclinux] Port to new card and microblaze not starting

[John Williams <jwilliams@xxxxxxxxxxxxxx>]

Hi Valentin,

Valentin Longchamp wrote:

> I am working on porting Microblaze uclinux to a new board : here are the
> characteristics :
> 
> Virtex-II 1000
> 1 Mb SRAM
> 32 Mb SDRAM
> 1 serial port
> Some leds and switchs (gpio)

[snip]

> Now my problem is that I cannot make the uclinux Microblaze even boot
> (cannot see the bootloader start, or cannot access it through xmd : here
> is what I get with XMD :
> 
[snip]

>>Verify if FPGA is configured and MicroBlaze System Clock is connected properly
>>Unable to Stop MicroBlaze

....

Double-check your clocking and reset circuits.  In particular, make sure 
of the polarity of your external reset, and that it is consistent with 
the various cores in your system (microblaze, busses, the FSL/MDM 
channel), and so on.  I note for example that the download_link FSL has 
"EXT_RESET_HIGH=0", but your microblaze doesn't.  So, there's something 
to check straight away.

You'll definitely want to get some simple test programs (esp. memory 
test) running directly on microblaze before you go for the full kernel.

Hope this helps,

John
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