[ARM] mm: allow LH7A40x to use sparsemem
Enable Sparsemem support for LH7A40x SoCs, while still allowing the
existing discontig support for the time being.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index ef218ea..f5bf38b5 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -510,6 +510,8 @@
config ARCH_LH7A40X
bool "Sharp LH7A40X"
+ select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
+ select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
help
Say Y here for systems based on one of the Sharp LH7A40X
System on a Chip processors. These CPUs include an ARM922T
@@ -842,12 +844,6 @@
# Discontigmem is deprecated
config ARCH_DISCONTIGMEM_ENABLE
bool
- default (ARCH_LH7A40X && !LH7A40X_CONTIGMEM)
- help
- Say Y to support efficient handling of discontiguous physical memory,
- for architectures which are either NUMA (Non-Uniform Memory Access)
- or have huge holes in the physical address space for other reasons.
- See <file:Documentation/vm/numa> for more.
config ARCH_SPARSEMEM_ENABLE
bool
diff --git a/arch/arm/mach-lh7a40x/Kconfig b/arch/arm/mach-lh7a40x/Kconfig
index 6f4c6a1..9be7466 100644
--- a/arch/arm/mach-lh7a40x/Kconfig
+++ b/arch/arm/mach-lh7a40x/Kconfig
@@ -40,23 +40,22 @@
bool
config LH7A40X_CONTIGMEM
- bool "Disable NUMA Support"
- depends on ARCH_LH7A40X
+ bool "Disable NUMA/SparseMEM Support"
help
Say Y here if your bootloader sets the SROMLL bit(s) in
the SDRAM controller, organizing memory as a contiguous
- array. This option will disable CONFIG_DISCONTIGMEM and
- force the kernel to manage all memory in one node.
+ array. This option will disable sparse memory support
+ and force the kernel to manage all memory in one node.
- Setting this option incorrectly may prevent the kernel from
- booting. It is OK to leave it N.
+ Setting this option incorrectly may prevent the kernel
+ from booting. It is OK to leave it N.
For more information, consult
<file:Documentation/arm/Sharp-LH/SDRAM>.
config LH7A40X_ONE_BANK_PER_NODE
bool "Optimize NUMA Node Tables for Size"
- depends on ARCH_LH7A40X && !LH7A40X_CONTIGMEM
+ depends on !LH7A40X_CONTIGMEM
help
Say Y here to produce compact memory node tables. By
default pairs of adjacent physical RAM banks are managed
diff --git a/arch/arm/mach-lh7a40x/include/mach/memory.h b/arch/arm/mach-lh7a40x/include/mach/memory.h
index f7107b4..1da14ff 100644
--- a/arch/arm/mach-lh7a40x/include/mach/memory.h
+++ b/arch/arm/mach-lh7a40x/include/mach/memory.h
@@ -73,4 +73,10 @@
#endif
+/*
+ * Sparsemem version of the above
+ */
+#define MAX_PHYSMEM_BITS 32
+#define SECTION_SIZE_BITS 24
+
#endif