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/*

 * 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 */