ARM: implement highpte

Add the ARM implementation of highpte, which allows PTE tables to be
placed in highmem.  Unfortunately, we do not offer highpte support
when support for L2 cache is enabled.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 5 insertions, 0 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index aef63c8e3d2d..370f47787122 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1054,6 +1054,11 @@ config HIGHMEM
 
           If unsure, say n.
 
+config HIGHPTE
+        bool "Allocate 2nd-level pagetables from highmem"
+        depends on HIGHMEM
+        depends on !OUTER_CACHE
+
 source "mm/Kconfig"
 
 config LEDS