patch-2.4.23 linux-2.4.23/include/asm-ia64/nodedata.h

• Lines: 67
• Date: 2003-11-28 10:26:21.000000000 -0800
• Orig file: linux-2.4.22/include/asm-ia64/nodedata.h
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.22/include/asm-ia64/nodedata.h linux-2.4.23/include/asm-ia64/nodedata.h
@@ -0,0 +1,66 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (c) 2000 Silicon Graphics, Inc.  All rights reserved.
+ * Copyright (c) 2002 NEC Corp.
+ * Copyright (c) 2002 Erich Focht <efocht@ess.nec.de>
+ * Copyright (c) 2002 Kimio Suganuma <k-suganuma@da.jp.nec.com>
+ */
+
+
+#ifndef _ASM_IA64_NODEDATA_H
+#define _ASM_IA64_NODEDATA_H
+
+
+#include <asm/mmzone.h>
+
+/*
+ * Node Data. One of these structures is located on each node of a NUMA system.
+ */
+
+struct pglist_data;
+struct ia64_node_data {
+	short			node;
+	short			active_cpu_count;
+	/*
+	 * The fields are read-only (after boot). They contain pointers to various structures
+	 * located on other nodes. Ths data is replicated on each node in order to reduce
+	 * off-node references.
+	 */
+        struct pglist_data	*pg_data_ptrs[NR_NODES];
+	struct ia64_node_data	*node_data_ptrs[NR_NODES];
+};
+
+
+/*
+ * Return a pointer to the node_data structure for the executing cpu.
+ */
+#define local_node_data		(local_cpu_data->node_data)
+
+
+/*
+ * Return a pointer to the node_data structure for the specified node.
+ */
+#define node_data(node)	(local_node_data->node_data_ptrs[node])
+
+
+/*
+ * Given a node id, return a pointer to the pg_data_t for the node.
+ * The following 2 macros are similar. 
+ *
+ * NODE_DATA 	- should be used in all code not related to system
+ *		  initialization. It uses pernode data structures to minimize
+ *		  offnode memory references. However, these structure are not 
+ *		  present during boot. This macro can be used once cpu_init
+ *		  completes.
+ *
+ * NOTE:   The names of these macros are misleading but are difficult to change
+ *	   since they are used in generic linux & on other architecures.
+ */
+#define NODE_DATA(nid)		(local_node_data->pg_data_ptrs[nid])
+
+extern struct pglist_data * __init boot_get_pg_data_ptr(long);
+
+#endif /* _ASM_IA64_NODEDATA_H */