include/asm-ia64/nodedata.h

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (c) 2000 Silicon Graphics, Inc.  All rights reserved.
   7  * Copyright (c) 2002 NEC Corp.
   8  * Copyright (c) 2002 Erich Focht <efocht@ess.nec.de>
   9  * Copyright (c) 2002 Kimio Suganuma <k-suganuma@da.jp.nec.com>
  10  */
  11 #ifndef _ASM_IA64_NODEDATA_H
  12 #define _ASM_IA64_NODEDATA_H
  13
  14 #include <linux/config.h>
  15 #include <linux/numa.h>
  16
  17 #include <asm/percpu.h>
  18 #include <asm/mmzone.h>
  19
  20 #ifdef CONFIG_NUMA
  21
  22 /*
  23  * Node Data. One of these structures is located on each node of a NUMA system.
  24  */
  25
  26 struct pglist_data;
  27 struct ia64_node_data {
  28         short                   active_cpu_count;
  29         short                   node;
  30         struct pglist_data      *pg_data_ptrs[MAX_NUMNODES];
  31 };
  32
  33
  34 /*
  35  * Return a pointer to the node_data structure for the executing cpu.
  36  */
  37 #define local_node_data         (local_cpu_data->node_data)
  38
  39 /*
  40  * Given a node id, return a pointer to the pg_data_t for the node.
  41  *
  42  * NODE_DATA    - should be used in all code not related to system
  43  *                initialization. It uses pernode data structures to minimize
  44  *                offnode memory references. However, these structure are not
  45  *                present during boot. This macro can be used once cpu_init
  46  *                completes.
  47  */
  48 #define NODE_DATA(nid)          (local_node_data->pg_data_ptrs[nid])
  49
  50 #endif /* CONFIG_NUMA */
  51
  52 #endif /* _ASM_IA64_NODEDATA_H */