[U-Boot] [PATCH] powerpc: do not fixup NULL ptrs
Andre Schwarz
andre.schwarz at matrix-vision.de
Tue Oct 26 14:34:57 CEST 2010
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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