sh: sparsemem support.

This implements basic sparsemem support for SH. Presently this only
uses static sparsemem, and we still permit explicit selection of
flatmem. Those boards that want sparsemem can select it as usual.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 16 insertions, 0 deletions

diff --git a/include/asm-sh/sparsemem.h b/include/asm-sh/sparsemem.h
new file mode 100644
index 000000000000..547a540b6667
--- /dev/null
+++ b/include/asm-sh/sparsemem.h
@@ -0,0 +1,16 @@
+#ifndef __ASM_SH_SPARSEMEM_H
+#define __ASM_SH_SPARSEMEM_H
+
+#ifdef __KERNEL__
+/*
+ * SECTION_SIZE_BITS            2^N: how big each section will be
+ * MAX_PHYSADDR_BITS            2^N: how much physical address space we have
+ * MAX_PHYSMEM_BITS             2^N: how much memory we can have in that space
+ */
+#define SECTION_SIZE_BITS       26
+#define MAX_PHYSADDR_BITS       32
+#define MAX_PHYSMEM_BITS        32
+
+#endif
+
+#endif /* __ASM_SH_SPARSEMEM_H */