/*
   * 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 <linux/numa.h>
  
  #include <asm/percpu.h>
  #include <asm/mmzone.h>

  #ifdef CONFIG_NUMA

  
  /*
   * Node Data. One of these structures is located on each node of a NUMA system.
   */
  
  struct pglist_data;
  struct ia64_node_data {
  	short			active_cpu_count;
  	short			node;
  	struct pglist_data	*pg_data_ptrs[MAX_NUMNODES];
  };
  
  
  /*
   * Return a pointer to the node_data structure for the executing cpu.
   */
  #define local_node_data		(local_cpu_data->node_data)
  
  /*
   * Given a node id, return a pointer to the pg_data_t for the node.
   *
   * 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.
   */
  #define NODE_DATA(nid)		(local_node_data->pg_data_ptrs[nid])

  /*
   * LOCAL_DATA_ADDR - This is to calculate the address of other node's
   *		     "local_node_data" at hot-plug phase. The local_node_data
   *		     is pointed by per_cpu_page. Kernel usually use it for
   *		     just executing cpu. However, when new node is hot-added,
   *		     the addresses of local data for other nodes are necessary
   *		     to update all of them.
   */
  #define LOCAL_DATA_ADDR(pgdat)  			\
  	((struct ia64_node_data *)((u64)(pgdat) + 	\
  				   L1_CACHE_ALIGN(sizeof(struct pglist_data))))

  #endif /* CONFIG_NUMA */

  
  #endif /* _ASM_IA64_NODEDATA_H */