1 files changed, 63 insertions, 0 deletions
diff --git a/include/asm-x86_64/mmzone.h b/include/asm-x86_64/mmzone.h
new file mode 100644
index 00000000000..d95b7c24083
--- /dev/null
+++ b/include/asm-x86_64/mmzone.h
@@ -0,0 +1,63 @@
+/* K8 NUMA support */
+/* Copyright 2002,2003 by Andi Kleen, SuSE Labs */
+/* 2.5 Version loosely based on the NUMAQ Code by Pat Gaughen. */
+#ifndef _ASM_X86_64_MMZONE_H
+#define _ASM_X86_64_MMZONE_H 1
+
+#include <linux/config.h>
+
+#ifdef CONFIG_DISCONTIGMEM
+
+#define VIRTUAL_BUG_ON(x) 
+
+#include <asm/smp.h>
+
+#define NODEMAPSIZE 0xff
+
+/* Simple perfect hash to map physical addresses to node numbers */
+extern int memnode_shift; 
+extern u8  memnodemap[NODEMAPSIZE]; 
+extern int maxnode;
+
+extern struct pglist_data *node_data[];
+
+static inline __attribute__((pure)) int phys_to_nid(unsigned long addr) 
+{ 
+	int nid; 
+	VIRTUAL_BUG_ON((addr >> memnode_shift) >= NODEMAPSIZE);
+	nid = memnodemap[addr >> memnode_shift]; 
+	VIRTUAL_BUG_ON(nid > maxnode); 
+	return nid; 
+} 
+
+#define pfn_to_nid(pfn) phys_to_nid((unsigned long)(pfn) << PAGE_SHIFT)
+
+#define kvaddr_to_nid(kaddr)	phys_to_nid(__pa(kaddr))
+#define NODE_DATA(nid)		(node_data[nid])
+
+#define node_mem_map(nid)	(NODE_DATA(nid)->node_mem_map)
+
+#define node_mem_map(nid)	(NODE_DATA(nid)->node_mem_map)
+#define node_start_pfn(nid)	(NODE_DATA(nid)->node_start_pfn)
+#define node_end_pfn(nid)       (NODE_DATA(nid)->node_start_pfn + \
+				 NODE_DATA(nid)->node_spanned_pages)
+
+#define local_mapnr(kvaddr) \
+	( (__pa(kvaddr) >> PAGE_SHIFT) - node_start_pfn(kvaddr_to_nid(kvaddr)) )
+
+/* AK: this currently doesn't deal with invalid addresses. We'll see 
+   if the 2.5 kernel doesn't pass them
+   (2.4 used to). */
+#define pfn_to_page(pfn) ({ \
+	int nid = phys_to_nid(((unsigned long)(pfn)) << PAGE_SHIFT); 	\
+	((pfn) - node_start_pfn(nid)) + node_mem_map(nid);		\
+})
+
+#define page_to_pfn(page) \
+	(long)(((page) - page_zone(page)->zone_mem_map) + page_zone(page)->zone_start_pfn)
+
+#define pfn_valid(pfn) ((pfn) >= num_physpages ? 0 : \
+			({ u8 nid__ = pfn_to_nid(pfn); \
+			   nid__ != 0xff && (pfn) >= node_start_pfn(nid__) && (pfn) <= node_end_pfn(nid__); }))
+#endif
+#endif