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authorVineet Gupta <vgupta@synopsys.com>2015-02-06 18:44:57 +0300
committerVineet Gupta <vgupta@synopsys.com>2015-10-29 16:11:30 +0300
commit5a364c2a1762e8a78721fafc93144509c0b6cb84 (patch)
treedc74e67f8908cbfe0c5753515c8097339d55dc80 /arch/arc/Kconfig
parent25d464183ca3522ae27ec1bbef5ddcbbbef65017 (diff)
downloadlinux-5a364c2a1762e8a78721fafc93144509c0b6cb84.tar.xz
ARC: mm: PAE40 support
This is the first working implementation of 40-bit physical address extension on ARCv2. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc/Kconfig')
-rw-r--r--arch/arc/Kconfig15
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index fd9632f4ddc8..2c2ac3f3ff80 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -453,6 +453,21 @@ config HIGHMEM
kernel. Enable this to potentially allow access to rest of 2G and PAE
in future
+config ARC_HAS_PAE40
+ bool "Support for the 40-bit Physical Address Extension"
+ default n
+ depends on ISA_ARCV2
+ select HIGHMEM
+ help
+ Enable access to physical memory beyond 4G, only supported on
+ ARC cores with 40 bit Physical Addressing support
+
+config ARCH_PHYS_ADDR_T_64BIT
+ def_bool ARC_HAS_PAE40
+
+config ARCH_DMA_ADDR_T_64BIT
+ bool
+
config ARC_CURR_IN_REG
bool "Dedicate Register r25 for current_task pointer"
default y