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powerpc/mm: Fix handling of _PAGE_COHERENT in BAT setup code 

_PAGE_COHERENT is now always set in _PAGE_RAM resp. PAGE_KERNEL.
Thus it has to be masked out, if the BAT mapping should be non
cacheable or CPU_FTR_NEED_COHERENT is not set.

This will work on normal SMP setups because we force-set
CPU_FTR_NEED_COHERENT as part of CPU_FTR_COMMON on SMP.

Signed-off-by: Gerhard Pircher <gerhard_pircher@gmx.net>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Gerhard Pircher 2009-01-23 06:51:28 +00:00 committed by Benjamin Herrenschmidt
parent 69b052e828
commit 4c456a67f5
1 changed files with 3 additions and 3 deletions
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6
arch/powerpc/mm/ppc_mmu_32.c
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@ -123,9 +123,9 @@ void __init setbat(int index, unsigned long virt, phys_addr_t phys,
int wimgxpp;
struct ppc_bat *bat = BATS[index];
if (((flags & _PAGE_NO_CACHE) == 0) &&
cpu_has_feature(CPU_FTR_NEED_COHERENT))
flags |= _PAGE_COHERENT;
if ((flags & _PAGE_NO_CACHE) ||
(cpu_has_feature(CPU_FTR_NEED_COHERENT) == 0))
flags &= ~_PAGE_COHERENT;
bl = (size >> 17) - 1;
if (PVR_VER(mfspr(SPRN_PVR)) != 1) {