[ARM] mm: switch SA1100 to use sparsemem

Tested on Assabet, and Assabet with Neponset's SDRAM at 3328M phys.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 7 insertions, 9 deletions

diff --git a/arch/arm/mach-sa1100/include/mach/memory.h b/arch/arm/mach-sa1100/include/mach/memory.h
index 29f639e2afc6..1c127b68581d 100644
--- a/arch/arm/mach-sa1100/include/mach/memory.h
+++ b/arch/arm/mach-sa1100/include/mach/memory.h
@@ -40,23 +40,21 @@ void sa1111_adjust_zones(int node, unsigned long *size, unsigned long *holes);
 #define __bus_to_virt(x)         __phys_to_virt(x)
 
 /*
- * Because of the wide memory address space between physical RAM banks on the 
- * SA1100, it's much convenient to use Linux's NUMA support to implement our 
- * memory map representation.  Assuming all memory nodes have equal access 
+ * Because of the wide memory address space between physical RAM banks on the
+ * SA1100, it's much convenient to use Linux's SparseMEM support to implement
+ * our memory map representation.  Assuming all memory nodes have equal access
  * characteristics, we then have generic discontiguous memory support.
  *
- * Of course, all this isn't mandatory for SA1100 implementations with only
- * one used memory bank.  For those, simply undefine CONFIG_DISCONTIGMEM.
- *
- * The nodes are matched with the physical memory bank addresses which are 
- * incidentally the same as virtual addresses.
+ * The sparsemem banks are matched with the physical memory bank addresses
+ * which are incidentally the same as virtual addresses.
  * 
  *      node 0:  0xc0000000 - 0xc7ffffff
  *      node 1:  0xc8000000 - 0xcfffffff
  *      node 2:  0xd0000000 - 0xd7ffffff
  *      node 3:  0xd8000000 - 0xdfffffff
  */
-#define NODE_MEM_SIZE_BITS      27
+#define MAX_PHYSMEM_BITS        32
+#define SECTION_SIZE_BITS       27
 
 /*
  * Cache flushing area - SA1100 zero bank