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authorBecky Bruce <beckyb@kernel.crashing.org>2010-06-30 10:23:31 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2010-07-09 11:28:26 +1000
commitd10ac3734d07bee675384d22d06883b3c57b1524 (patch)
tree9e7530b9cddfbfe069b18f504eeccd6fdc333337 /arch/powerpc/mm/fsl_booke_mmu.c
parent6901c6cca1271d1724fc15e9937e0820e2d2fbd5 (diff)
downloadtalos-op-linux-d10ac3734d07bee675384d22d06883b3c57b1524.tar.gz
talos-op-linux-d10ac3734d07bee675384d22d06883b3c57b1524.zip
powerpc/fsl-booke: Fix comments in mmu code that mention BATS
There are no BATS on BookE - we have the TLBCAM instead. Also correct the page size information to included extended sizes. We don't actually allow a 4G page size to be used, so comment on that as well. Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/mm/fsl_booke_mmu.c')
-rw-r--r--arch/powerpc/mm/fsl_booke_mmu.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/arch/powerpc/mm/fsl_booke_mmu.c b/arch/powerpc/mm/fsl_booke_mmu.c
index cdc7526e9c93..4b66a1ece6d8 100644
--- a/arch/powerpc/mm/fsl_booke_mmu.c
+++ b/arch/powerpc/mm/fsl_booke_mmu.c
@@ -104,9 +104,10 @@ unsigned long p_mapped_by_tlbcam(phys_addr_t pa)
}
/*
- * Set up one of the I/D BAT (block address translation) register pairs.
- * The parameters are not checked; in particular size must be a power
- * of 4 between 4k and 256M.
+ * Set up a variable-size TLB entry (tlbcam). The parameters are not checked;
+ * in particular size must be a power of 4 between 4k and 256M (or 1G, for cpus
+ * that support extended page sizes). Note that while some cpus support a
+ * page size of 4G, we don't allow its use here.
*/
static void settlbcam(int index, unsigned long virt, phys_addr_t phys,
unsigned long size, unsigned long flags, unsigned int pid)
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