ARC: support HIGHMEM even without PAE40

[deliverable/linux.git] / arch / arc / Kconfig

diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index 12d0284a46e54a6cc74edde0fb5956924673a183..a8767430df7d6012463c8a34366d251496d15364 100644 (file)
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -35,8 +35,10 @@ config ARC
        select NO_BOOTMEM
        select OF
        select OF_EARLY_FLATTREE
+       select OF_RESERVED_MEM
        select PERF_USE_VMALLOC
        select HAVE_DEBUG_STACKOVERFLOW
+       select HAVE_GENERIC_DMA_COHERENT
 
 config MIGHT_HAVE_PCI
        bool
@@ -56,6 +58,9 @@ config GENERIC_CSUM
 config RWSEM_GENERIC_SPINLOCK
        def_bool y
 
+config ARCH_DISCONTIGMEM_ENABLE
+       def_bool y
+
 config ARCH_FLATMEM_ENABLE
        def_bool y
 
@@ -345,6 +350,15 @@ config ARC_HUGEPAGE_16M
 
 endchoice
 
+config NODES_SHIFT
+       int "Maximum NUMA Nodes (as a power of 2)"
+       default "1" if !DISCONTIGMEM
+       default "2" if DISCONTIGMEM
+       depends on NEED_MULTIPLE_NODES
+       ---help---
+         Accessing memory beyond 1GB (with or w/o PAE) requires 2 memory
+         zones.
+
 if ISA_ARCOMPACT
 
 config ARC_COMPACT_IRQ_LEVELS
@@ -453,6 +467,7 @@ config LINUX_LINK_BASE
 
 config HIGHMEM
        bool "High Memory Support"
+       select DISCONTIGMEM
        help
          With ARC 2G:2G address split, only upper 2G is directly addressable by
          kernel. Enable this to potentially allow access to rest of 2G and PAE