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authorBob Picco <bob.picco@hp.com>2005-10-04 15:13:50 -0400
committerTony Luck <tony.luck@intel.com>2005-10-04 13:21:13 -0700
commit1be7d9935b9c7fb9bd5964bfaf3ac543381277db (patch)
treefe39c6d9e19fb890812318f5f3b318de6c3afc57 /include/asm-ia64/sparsemem.h
parentc678796cab4b5288ad578802a54cb1480ae20a08 (diff)
[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>
Diffstat (limited to 'include/asm-ia64/sparsemem.h')
-rw-r--r--include/asm-ia64/sparsemem.h20
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 */