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powerpc/85xx: Fix writing to spin table 'cpu-release-addr' on ppc64e 

If the spin table is located in the linear mapping (which can happen if
we have 4G or more of memory) we need to access the spin table via a
cacheable coherent mapping like we do on ppc32 (and do explicit cache
flush).

See the following commit for the ppc32 version of this issue:

commit d1d47ec6e6
Author: Peter Tyser <ptyser@xes-inc.com>
Date:   Fri Dec 18 16:50:37 2009 -0600

    powerpc/85xx: Fix SMP when "cpu-release-addr" is in lowmem

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Kumar Gala 2011-02-14 22:45:48 -06:00
parent 964a29962c
commit decbb280bb
1 changed files with 5 additions and 1 deletions
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6
arch/powerpc/platforms/85xx/smp.c
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@ -91,10 +91,14 @@ smp_85xx_kick_cpu(int nr)
while ((__secondary_hold_acknowledge != nr) && (++n < 1000))
mdelay(1);
#else
smp_generic_kick_cpu(nr);
out_be64((u64 *)(bptr_vaddr + BOOT_ENTRY_ADDR_UPPER),
__pa((u64)*((unsigned long long *) generic_secondary_smp_init)));
smp_generic_kick_cpu(nr);
if (!ioremappable)
flush_dcache_range((ulong)bptr_vaddr,
(ulong)(bptr_vaddr + SIZE_BOOT_ENTRY));
#endif
local_irq_restore(flags);