linux/arch/ia64/include/asm/nodedata.h
<<
>>
Prefs
   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/numa.h>
  15
  16#include <asm/percpu.h>
  17#include <asm/mmzone.h>
  18
  19#ifdef CONFIG_NUMA
  20
  21/*
  22 * Node Data. One of these structures is located on each node of a NUMA system.
  23 */
  24
  25struct pglist_data;
  26struct ia64_node_data {
  27        short                   active_cpu_count;
  28        short                   node;
  29        struct pglist_data      *pg_data_ptrs[MAX_NUMNODES];
  30};
  31
  32
  33/*
  34 * Return a pointer to the node_data structure for the executing cpu.
  35 */
  36#define local_node_data         (local_cpu_data->node_data)
  37
  38/*
  39 * Given a node id, return a pointer to the pg_data_t for the node.
  40 *
  41 * NODE_DATA    - should be used in all code not related to system
  42 *                initialization. It uses pernode data structures to minimize
  43 *                offnode memory references. However, these structure are not 
  44 *                present during boot. This macro can be used once cpu_init
  45 *                completes.
  46 */
  47#define NODE_DATA(nid)          (local_node_data->pg_data_ptrs[nid])
  48
  49/*
  50 * LOCAL_DATA_ADDR - This is to calculate the address of other node's
  51 *                   "local_node_data" at hot-plug phase. The local_node_data
  52 *                   is pointed by per_cpu_page. Kernel usually use it for
  53 *                   just executing cpu. However, when new node is hot-added,
  54 *                   the addresses of local data for other nodes are necessary
  55 *                   to update all of them.
  56 */
  57#define LOCAL_DATA_ADDR(pgdat)                          \
  58        ((struct ia64_node_data *)((u64)(pgdat) +       \
  59                                   L1_CACHE_ALIGN(sizeof(struct pglist_data))))
  60
  61#endif /* CONFIG_NUMA */
  62
  63#endif /* _ASM_IA64_NODEDATA_H */
  64
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.