[U-Boot] [PATCH] powerpc: do not fixup NULL ptrs

[Andre Schwarz <andre.schwarz@matrix-vision.de>]

All,

>
>> Having a look at include/asm/global_data.h gives some 40 ulongs for my
>> MPC8377 system.
>> Current CONFIG_SYS_GBL_DATA_SIZE= 0x100 which should be enough.
>>      
> Indeed. I was asking because I just discovered that most of the
> PowerPC boards are actually broken in this respect - 89 % of them,
> 170 out of 191 :-(
>
>    
>> The system is still dead after removing the 4 nops after _start.
>>      

actually I'm facing another issue and don't now whether this might be 
related to this thread or not.


Just before relocation in arch/powerpc/lib/board.c the CPU gets a "check 
stop" followed by reset during "memset()" in line 493.

[snip]
DRAM:  256 MiB
Top of RAM usable for U-Boot at: 10000000
Reserving 341k for U-Boot at: 0ffaa000
Reserving 512k for malloc() at: 0ff29f80

- reset -

U-Boot 2010.09-00488-g5edbadb-dirty (Oct 26 2010 - 14:16:00) MPC83XX

Reset Status: Check Stop, External/Internal Soft, External/Internal Hard


I know that DDR might not be 100% stable but it is basically set up 
properly.
Removing the memset yields the next debug messages before resetting 
again while setting up SP.

Is the DDR required to work 100% for a simple write operation or might 
there be another problem ?

256MiB DDR is mapped by single BAT and there should be no overlapping 
BATs either.


Any ideas ?

-- 

Regards,
Andre



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