Specifications

26 TMS320C6457 Fixed-Point Digital Signal Processor Silicon Errata SPRZ293A—November 2009
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With all the steps above, it is fairly painful to determine if a particular buffer has the
potential to see this issue. Figure 4 is a simple decision tree to help make a
determination for a particular buffer.
Figure 4 Decision Tree
OK
NN
Is the CPU reading
from this buffer?
OK
NN
Is the CPU writing
to this buffer?
OK
N
N
Does the DMA access
the same buffer
(read or write)
?
OK
N
Is there a software
control mechanism to
force buffer ownership between
the CPU and the DMA
through WB/invalidate
?
Y
Y
Y
Y
Potential Problem