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authorTrent Piepho <tpiepho@freescale.com>2008-12-08 19:34:58 -0800
committerKumar Gala <galak@kernel.crashing.org>2009-01-28 18:16:54 -0600
commit96051465fdc29e00dd14b484a45daac089c657f8 (patch)
tree4aa82c96d9a7e8c8b3b0c0c7f4ada4bf903ea422 /arch/powerpc/mm
parentc8f3570b7e2dd070ba6da41f3ed4ffb4e1d296af (diff)
powerpc/fsl-booke: Make CAM entries used for lowmem configurable
On booke processors, the code that maps low memory only uses up to three CAM entries, even though there are sixteen and nothing else uses them. Make this number configurable in the advanced options menu along with max low memory size. If one wants 1 GB of lowmem, then it's typically necessary to have four CAM entries. Signed-off-by: Trent Piepho <tpiepho@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/mm')
-rw-r--r--arch/powerpc/mm/fsl_booke_mmu.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/powerpc/mm/fsl_booke_mmu.c b/arch/powerpc/mm/fsl_booke_mmu.c
index dfd292748e6..0b9ba6be49d 100644
--- a/arch/powerpc/mm/fsl_booke_mmu.c
+++ b/arch/powerpc/mm/fsl_booke_mmu.c
@@ -56,10 +56,14 @@
extern void loadcam_entry(unsigned int index);
unsigned int tlbcam_index;
-static unsigned long cam[3];
+static unsigned long cam[CONFIG_LOWMEM_CAM_NUM];
#define NUM_TLBCAMS (16)
+#if defined(CONFIG_LOWMEM_CAM_NUM_BOOL) && (CONFIG_LOWMEM_CAM_NUM >= NUM_TLBCAMS)
+#error "LOWMEM_CAM_NUM must be less than NUM_TLBCAMS"
+#endif
+
struct tlbcam TLBCAM[NUM_TLBCAMS];
struct tlbcamrange {