Hi Tony,

Hi all,

Here are some experimental patches to allow booting ARMv7 SMP
kernel on UP to some extent. Posting these early in case it is
of any help as I know at least Bryan Wu is working on similar
issues.

The patches are very much work in progress, and does not quite
boot to init yet so there's all kinds of things to fix. But at
least these patches allow booting to the point where the fixing
issues might be a bit easier.. Currently it boots to the point
where there are tons of "WARNING: at mm/percpu-vm.c:320 pcpu_alloc"
prints.

I've got some similar hacks for the RealView boards which I've used
to build a Kernel that can boot on the PB-A8 and PBX-A9. Whilst this
is the wrong way of going about solving the problem [Russell's code
patching is a lot neater and more scaleable] you might be interested
in looking at the code anyway:

http://www.linux-arm.org/git?p=linux-2.6-wd.git;a=shortlog;h=refs/heads/smp-up-hacks

Only v7 cores are supported and TEX remapping is used to avoid having
to worry about setting the shared attribute at runtime. Yuck!

Will