powerpc/kexec: Adds correct calling convention for kexec purgatory
authorMatthew McClintock <msm@freescale.com>
Fri, 27 Aug 2010 11:58:21 +0000 (11:58 +0000)
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>
Tue, 31 Aug 2010 01:35:12 +0000 (11:35 +1000)
commit4562c986f0d694124de20815adf7e1aad8a94668
treec8ca89c874ee92a5bb7571cdb5841b83b544acb3
parent2bfc96a127bc1cc94d26bfaa40159966064f9c8c
powerpc/kexec: Adds correct calling convention for kexec purgatory

Call kexec purgatory code correctly. We were getting lucky before.
If you examine the powerpc 32bit kexec "purgatory" code you will
see it expects the following:

>From kexec-tools: purgatory/arch/ppc/v2wrap_32.S
-> calling convention:
->   r3 = physical number of this cpu (all cpus)
->   r4 = address of this chunk (master only)

As such, we need to set r3 to the current core, r4 happens to be
unused by purgatory at the moment but we go ahead and set it
here as well

Signed-off-by: Matthew McClintock <msm@freescale.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
arch/powerpc/kernel/misc_32.S