[PATCH] V5 ia64 SPARSEMEM - conditional changes for SPARSEMEM

This patch introduces the conditional changes required for the three
memory models.  With [patch 1/4] there are three memory models; FLATMEM,
DISCONTIG and SPARSEMEM.  Also a new arch include file sparemem.h is
introduced for defining SPARSEMEM parameters.

Signed-off-by: Bob Picco <bob.picco@hp.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/include/asm-ia64/sparsemem.h b/include/asm-ia64/sparsemem.h
new file mode 100644
index 000000000000..67a7c40ec27f
--- /dev/null
+++ b/include/asm-ia64/sparsemem.h
@@ -0,0 +1,20 @@
+#ifndef _ASM_IA64_SPARSEMEM_H
+#define _ASM_IA64_SPARSEMEM_H
+
+#ifdef CONFIG_SPARSEMEM
+/*
+ * SECTION_SIZE_BITS            2^N: how big each section will be
+ * MAX_PHYSMEM_BITS             2^N: how much memory we can have in that space
+ */
+
+#define SECTION_SIZE_BITS       (30)
+#define MAX_PHYSMEM_BITS        (50)
+#ifdef CONFIG_FORCE_MAX_ZONEORDER
+#if ((CONFIG_FORCE_MAX_ZONEORDER - 1 + PAGE_SHIFT) > SECTION_SIZE_BITS)
+#undef SECTION_SIZE_BITS
+#define SECTION_SIZE_BITS (CONFIG_FORCE_MAX_ZONEORDER - 1 + PAGE_SHIFT)
+#endif
+#endif
+
+#endif /* CONFIG_SPARSEMEM */
+#endif /* _ASM_IA64_SPARSEMEM_H */