Cache Inhibit on 860?

Steve Ferri sferri at
Tue Feb 27 03:12:32 EST 2001


I am having problems running on an 860 based card when reading and writing
for drivers and for user space applications.  Currently I am using the
and flush cache calls when READING and WRITING from/to the alloc'd memory
these situations.

Is there a way to alloc memory and mark it as cache inhibited ?

This would eliminating the need for the invalidate and flush calls.  I am
running a 2.2.14 version of the kernel on an 860 processor.

I've already tried using the m8xx_cpm_hostalloc() function in the
arch/ppc/8xx_io/commproc.c file.  This does not seem to work, as the memory
returned does not seem to be cache inhibited.  I still need to flush
and invalidate these regions.

Any ideas ?


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