patch-2.4.22 linux-2.4.22/include/asm-sh/mmzone.h

• Lines: 62
• Date: 2003-08-25 04:44:44.000000000 -0700
• Orig file: linux-2.4.21/include/asm-sh/mmzone.h
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.21/include/asm-sh/mmzone.h linux-2.4.22/include/asm-sh/mmzone.h
@@ -0,0 +1,61 @@
+/*
+ *  linux/include/asm-sh/mmzone.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __ASM_SH_MMZONE_H
+#define __ASM_SH_MMZONE_H
+
+#include <linux/config.h>
+
+/* Currently, just for HP690 */
+#define PHYSADDR_TO_NID(phys)	((((phys) - __MEMORY_START) >= 0x01000000)?1:0)
+#define NR_NODES 2
+
+extern pg_data_t discontig_page_data[NR_NODES];
+extern bootmem_data_t discontig_node_bdata[NR_NODES];
+
+#ifdef CONFIG_DISCONTIGMEM
+/*
+ * 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)	PHYSADDR_TO_NID(__pa(kaddr))
+
+/*
+ * Return a pointer to the node data for node n.
+ */
+#define NODE_DATA(nid)		(&discontig_page_data[nid])
+
+/*
+ * NODE_MEM_MAP gives the kaddr for the mem_map of the node.
+ */
+#define NODE_MEM_MAP(nid)	(NODE_DATA(nid)->node_mem_map)
+
+#define phys_to_page(phys)						\
+({ unsigned int node = PHYSADDR_TO_NID(phys); 		      		\
+   NODE_MEM_MAP(node)				 		 	\
+     + (((phys) - NODE_DATA(node)->node_start_paddr) >> PAGE_SHIFT); })
+
+static inline int is_valid_page(struct page *page)
+{
+	unsigned int i;
+
+	for (i = 0; i < NR_NODES; i++) {
+		if (page >= NODE_MEM_MAP(i) &&
+		    page < NODE_MEM_MAP(i) + NODE_DATA(i)->node_size)
+			return 1;
+	}
+	return 0;
+}
+
+#define VALID_PAGE(page)	is_valid_page(page)
+#define page_to_phys(page)	PHYSADDR(page_address(page))
+
+#endif /* CONFIG_DISCONTIGMEM */
+#endif