MPC8248 IDMA PCI burst
ArunR at aaesys.com
Sat Feb 14 04:38:19 EST 2009
I am having some problem with the PCI burst using the MPC8248 IDMA feature. I can get a continuous burst of 2k when transferring data from the system memory to the PCI direction but in the other direction (i.e. PCI to system memory) the PCI burst is fragmented with 32 bytes of fragment. I have verified that the Prefetch bit is set in the POCMR register.
Here are my settings :
DCM : DMA_WRAP=101, SINC=1, DINC=1, S/D=00
Transfer buffer size is 2048 bytes
BD flags : V=1, W=1, I=1, L=1, BD Len = 1024
Any help will be appreciated.
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