Hi Geert,
On 03/06/11 21:15, Geert Uytterhoeven wrote:
On Fri, Jun 3, 2011 at 08:43,<gerg@xxxxxxxxxxxx> wrote:
From: Greg Ungerer<gerg@xxxxxxxxxxx>
There are 3 families of CPU core types that we support in the m68knommu
architecture branch. They are
. traditional 68000
. CPU32 (which is a 68020 core derivitive without MMU)
derivative ... and without bitfield instructions.
. ColdFire
It will be useful going forward to have a CONFIG_ option defined for
each type. We already have one for ColdFire (CONFIG_COLDFIRE), so add
for the other 2 families, CONFIG_M68000 and CONFIG_MCPU32.
I'm wondering whether it would help to have Kconfig symbols for the
instruction capabilities as well.
Then you have to document these capabilities in the kconfig definition only,
and can use single (e.g.) #ifdef CONFIG_CPU_HAS_BITFIELDS tests everywhere
else, instead of duplicating the logic at every #ifdef.
I have just posted a modified version of the bitops.h merge that
creates and uses a CONFIG_CPU_HAS_BITFIELDS option. The patch is
otherwise the same in terms of changes, just uses this define
for the ifdefs.
If you/others prefer this we can run with this one.
Regards
Greg
------------------------------------------------------------------------
Greg Ungerer -- Principal Engineer EMAIL: gerg@xxxxxxxxxxxx
SnapGear Group, McAfee PHONE: +61 7 3435 2888
8 Gardner Close FAX: +61 7 3217 5323
Milton, QLD, 4064, Australia WEB: http://www.SnapGear.com
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