[ARM] Add initial sparsemem support
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 4039a13..df051bd 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -422,6 +422,8 @@
bool "SA1100-based"
select ISA
select ARCH_DISCONTIGMEM_ENABLE
+ select ARCH_SPARSEMEM_ENABLE
+ select ARCH_SELECT_MEMORY_MODEL
select ARCH_MTD_XIP
select GENERIC_GPIO
select GENERIC_TIME
@@ -774,6 +776,12 @@
or have huge holes in the physical address space for other reasons.
See <file:Documentation/vm/numa> for more.
+config ARCH_SPARSEMEM_ENABLE
+ bool
+
+config ARCH_SELECT_MEMORY_MODEL
+ bool
+
config NODES_SHIFT
int
default "4" if ARCH_LH7A40X
diff --git a/arch/arm/mach-clps711x/Kconfig b/arch/arm/mach-clps711x/Kconfig
index 0e2b641..dbaae5f 100644
--- a/arch/arm/mach-clps711x/Kconfig
+++ b/arch/arm/mach-clps711x/Kconfig
@@ -31,6 +31,8 @@
bool "EDB7211"
select ISA
select ARCH_DISCONTIGMEM_ENABLE
+ select ARCH_SPARSEMEM_ENABLE
+ select ARCH_SELECT_MEMORY_MODEL
help
Say Y here if you intend to run this kernel on a Cirrus Logic EDB-7211
evaluation board.
diff --git a/include/asm-arm/memory.h b/include/asm-arm/memory.h
index d9bfb39..9ba4d71 100644
--- a/include/asm-arm/memory.h
+++ b/include/asm-arm/memory.h
@@ -217,7 +217,10 @@
#ifndef CONFIG_DISCONTIGMEM
#define ARCH_PFN_OFFSET PHYS_PFN_OFFSET
+
+#ifndef CONFIG_SPARSEMEM
#define pfn_valid(pfn) ((pfn) >= PHYS_PFN_OFFSET && (pfn) < (PHYS_PFN_OFFSET + max_mapnr))
+#endif
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
#define virt_addr_valid(kaddr) ((unsigned long)(kaddr) >= PAGE_OFFSET && (unsigned long)(kaddr) < (unsigned long)high_memory)
diff --git a/include/asm-arm/sparsemem.h b/include/asm-arm/sparsemem.h
new file mode 100644
index 0000000..2771581
--- /dev/null
+++ b/include/asm-arm/sparsemem.h
@@ -0,0 +1,10 @@
+#ifndef ASMARM_SPARSEMEM_H
+#define ASMARM_SPARSEMEM_H
+
+#include <asm/memory.h>
+
+#define MAX_PHYSADDR_BITS 32
+#define MAX_PHYSMEM_BITS 32
+#define SECTION_SIZE_BITS NODE_MEM_SIZE_BITS
+
+#endif
