It'd be also great if you make the UBL more straightforward to port for
boards with less than 256 MB memory.
For current implementation I had to change:
.ddrram2 starting address in ubl_davinci.lds,
MAX_IMAGE_SIZE in ubl.h and
RAM_END_ADDR in ubl.h
For my memory map (128 mb), I set them respectively to 0x84000000,
0x01000000 and 0x87FFFFFF
This could all be done in a single step with a -DRAM_END_ADDR=<desired
size> compiler option if
1) we didn't put gNandTx[] and gNandRx[] as static arrays in
ddrram2, but rather allocated them with ubl_alloc_mem()
2) made ubl_alloc_mem allocate from RAM_END_ADDR downwards, and not
from RAM_START_ADDR upwards
That would:
1) make configuration user friendly
2) obsolete the .ddrram2 section and hence make the ubl_davinci.lds
one for all configurations
3) make S-record decoding more unlikely to fail due to large image
sizes: since we download everything from the end of DDR downwards and
application entry points are usually closer to the start of DDR than to
the end of it.
Anyway, it would be also great if you check whether downloaded s-record
image and decoded binary image areas overlap. Instead of calling
SRecDecode() and waiting it to fail, you can UARTSendData() something
like "Unable to decode srecord. Application load address falls between
downloaded image boundaries"
What do you think?
Ivan
Allred, Daniel wrote:
You are correct. That got left over when I modified the file for
supporting big block devices. The customer tested it on a big block
device so it worked fine.
Thanks. It'll be fixed soon.
Regards,
Daniel
Daniel J. Allred
Software Applications
Catalog DSP / Emerging End Equipment
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email;internet:[EMAIL PROTECTED]
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