[ECOS] platform setup on GRG ram image with redboot..

vijay.peshkar@wipro.com vijay.peshkar@wipro.com
Mon Apr 10 09:50:00 GMT 2006

Hi All,

Am trying to run 'default' built image for GRG with
platform_setup code copied to vector.s on my IXP425
based custom board. I do not have flasher and hence
will have do without redboot.

Am observing that
1.If I single step thru the platform_setup code, all
sdram initialization happens well, the tables setup
from 0x4000 to 0x8000 happens well AND after that I
can do a 'go' till cyg_start a7d cyg_user_start
without any problem.
2.But, if I tried to avoid single stepping thru
platform_setup itself and instead if do a go even for
just few lines in it, the local registers(r0, r1 etc.,)
as well as sdram initialization goes haywire with.

Now, I am not able to make out how does it make a
difference if the platform_setup is run from flash
or sdram...why does it matter?. I tried adding
sufficient 'nops' between these steps but still no change.

Any pointers would be of great help.


Vijay Kumar .P
Wipro Technologies,
Tel: 30295119

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