[Cbe-oss-dev] Refactored cell powerpc oprofile patch

[Michael Ellerman]

On Mon, 2008-03-03 at 09:32 -0800, Carl Love wrote:
> At this point, the only issue I see with PS3 support using the existing
> CELL code is the FW calls.  The CELL code makes FW calls to setup the
> debug bus and do SPU cycle based profiling.  We started the process
> within IBM to get approval to share the FW code with Sony and Toshiba so
> that all three platforms can share the same FW interface.  This will
> eliminate adding any kernel support to access the debug bus registers.
> The debug bus setup register address will probably change with the next
> version of the HW.  Hence it is necessary to hide that info from the
> kernel in the HW specific firmware.

Slightly OT, but this is not entirely true. If it's simply a register
address that will change then it'd probably be easier to just put the
address in a device-tree property and have linux use that.

cheers

-- 
Michael Ellerman
OzLabs, IBM Australia Development Lab

wwweb: http://michael.ellerman.id.au
phone: +61 2 6212 1183 (tie line 70 21183)

We do not inherit the earth from our ancestors,
we borrow it from our children. - S.M.A.R.T Person
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