* problem with pci_alloc_consistent
@ 2002-09-16 22:38 wahmad
0 siblings, 0 replies; only message in thread
From: wahmad @ 2002-09-16 22:38 UTC (permalink / raw)
To: linuxppc-embedded
I am using pci_alloc_consistent() for obtaining contiguous memory that is
cache safe. Here is how I am calling the routine
pci_alloc_consistent(NULL,size,&dummy).
Note I am throwing away the bus address.
The memory that I get does not seem to be cache safe. My device doesn't see
the data untill I add flush_dcache_range(..). It is very undesirable for me
to add flushes and invalidates. I will appreciate any help in this matter.
I am using kernel version 2.4.20-pre5 for IBM PPC405GP and using version
2.95.3 for gcc on an x86 as a cross compiler.
I also have CONFIG_NOT_COHERENT_CACHE defined.
Thanks
Waqar
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