1 files changed, 94 insertions, 0 deletions
diff --git a/include/asm-ppc64/mmzone.h b/include/asm-ppc64/mmzone.h
new file mode 100644
index 000000000000..0619a41a3c9d
--- /dev/null
+++ b/include/asm-ppc64/mmzone.h
@@ -0,0 +1,94 @@
+/*
+ * Written by Kanoj Sarcar (kanoj@sgi.com) Aug 99
+ *
+ * PowerPC64 port:
+ * Copyright (C) 2002 Anton Blanchard, IBM Corp.
+ */
+#ifndef _ASM_MMZONE_H_
+#define _ASM_MMZONE_H_
+
+#include <linux/config.h>
+#include <asm/smp.h>
+
+#ifdef CONFIG_DISCONTIGMEM
+
+extern struct pglist_data *node_data[];
+
+/*
+ * Following are specific to this numa platform.
+ */
+
+extern int numa_cpu_lookup_table[];
+extern char *numa_memory_lookup_table;
+extern cpumask_t numa_cpumask_lookup_table[];
+extern int nr_cpus_in_node[];
+
+/* 16MB regions */
+#define MEMORY_INCREMENT_SHIFT 24
+#define MEMORY_INCREMENT (1UL << MEMORY_INCREMENT_SHIFT)
+
+/* NUMA debugging, will not work on a DLPAR machine */
+#undef DEBUG_NUMA
+
+static inline int pa_to_nid(unsigned long pa)
+{
+	int nid;
+
+	nid = numa_memory_lookup_table[pa >> MEMORY_INCREMENT_SHIFT];
+
+#ifdef DEBUG_NUMA
+	/* the physical address passed in is not in the map for the system */
+	if (nid == -1) {
+		printk("bad address: %lx\n", pa);
+		BUG();
+	}
+#endif
+
+	return nid;
+}
+
+#define pfn_to_nid(pfn)		pa_to_nid((pfn) << PAGE_SHIFT)
+
+/*
+ * Return a pointer to the node data for node n.
+ */
+#define NODE_DATA(nid)		(node_data[nid])
+
+#define node_localnr(pfn, nid)	((pfn) - NODE_DATA(nid)->node_start_pfn)
+
+/*
+ * Following are macros that each numa implmentation must define.
+ */
+
+/*
+ * Given a kernel address, find the home node of the underlying memory.
+ */
+#define kvaddr_to_nid(kaddr)	pa_to_nid(__pa(kaddr))
+
+#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_end_pfn)
+
+#define local_mapnr(kvaddr) \
+	( (__pa(kvaddr) >> PAGE_SHIFT) - node_start_pfn(kvaddr_to_nid(kvaddr)) 
+
+/* Written this way to avoid evaluating arguments twice */
+#define discontigmem_pfn_to_page(pfn) \
+({ \
+	unsigned long __tmp = pfn; \
+	(node_mem_map(pfn_to_nid(__tmp)) + \
+	 node_localnr(__tmp, pfn_to_nid(__tmp))); \
+})
+
+#define discontigmem_page_to_pfn(p) \
+({ \
+	struct page *__tmp = p; \
+	(((__tmp) - page_zone(__tmp)->zone_mem_map) + \
+	 page_zone(__tmp)->zone_start_pfn); \
+})
+
+/* XXX fix for discontiguous physical memory */
+#define discontigmem_pfn_valid(pfn)		((pfn) < num_physpages)
+
+#endif /* CONFIG_DISCONTIGMEM */
+#endif /* _ASM_MMZONE_H_ */