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| author | Vineet Gupta <vgupta@synopsys.com> | 2015-02-06 18:44:57 +0300 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2015-10-29 18:41:30 +0530 |
| commit | 5a364c2a1762e8a78721fafc93144509c0b6cb84 (patch) | |
| tree | dc74e67f8908cbfe0c5753515c8097339d55dc80 /arch/arc/Kconfig | |
| parent | 25d464183ca3522ae27ec1bbef5ddcbbbef65017 (diff) | |
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/Kconfig | 15 |
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 |