LXR linux/include/asm-generic/topology.h

   1/*
   2 * linux/include/asm-generic/topology.h
   3 *
   4 * Written by: Matthew Dobson, IBM Corporation
   5 *
   6 * Copyright (C) 2002, IBM Corp.
   7 *
   8 * All rights reserved.
   9 *
  10 * This program is free software; you can redistribute it and/or modify
  11 * it under the terms of the GNU General Public License as published by
  12 * the Free Software Foundation; either version 2 of the License, or
  13 * (at your option) any later version.
  14 *
  15 * This program is distributed in the hope that it will be useful, but
  16 * WITHOUT ANY WARRANTY; without even the implied warranty of
  17 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  18 * NON INFRINGEMENT.  See the GNU General Public License for more
  19 * details.
  20 *
  21 * You should have received a copy of the GNU General Public License
  22 * along with this program; if not, write to the Free Software
  23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24 *
  25 * Send feedback to <colpatch@us.ibm.com>
  26 */
  27#ifndef _ASM_GENERIC_TOPOLOGY_H
  28#define _ASM_GENERIC_TOPOLOGY_H
  29
  30#ifndef CONFIG_NUMA
  31
  32/* Other architectures wishing to use this simple topology API should fill
  33   in the below functions as appropriate in their own <asm/topology.h> file. */
  34#ifndef cpu_to_node
  35#define cpu_to_node(cpu)        ((void)(cpu),0)
  36#endif
  37#ifndef set_numa_node
  38#define set_numa_node(node)
  39#endif
  40#ifndef set_cpu_numa_node
  41#define set_cpu_numa_node(cpu, node)
  42#endif
  43#ifndef cpu_to_mem
  44#define cpu_to_mem(cpu)         ((void)(cpu),0)
  45#endif
  46
  47#ifndef cpumask_of_node
  48  #ifdef CONFIG_NEED_MULTIPLE_NODES
  49    #define cpumask_of_node(node)       ((node) == 0 ? cpu_online_mask : cpu_none_mask)
  50  #else
  51    #define cpumask_of_node(node)       ((void)(node), cpu_online_mask)
  52  #endif
  53#endif
  54#ifndef pcibus_to_node
  55#define pcibus_to_node(bus)     ((void)(bus), -1)
  56#endif
  57
  58#ifndef cpumask_of_pcibus
  59#define cpumask_of_pcibus(bus)  (pcibus_to_node(bus) == -1 ?            \
  60                                 cpu_all_mask :                         \
  61                                 cpumask_of_node(pcibus_to_node(bus)))
  62#endif
  63
  64#endif  /* CONFIG_NUMA */
  65
  66#if !defined(CONFIG_NUMA) || !defined(CONFIG_HAVE_MEMORYLESS_NODES)
  67
  68#ifndef set_numa_mem
  69#define set_numa_mem(node)
  70#endif
  71#ifndef set_cpu_numa_mem
  72#define set_cpu_numa_mem(cpu, node)
  73#endif
  74
  75#endif  /* !CONFIG_NUMA || !CONFIG_HAVE_MEMORYLESS_NODES */
  76
  77#endif /* _ASM_GENERIC_TOPOLOGY_H */
  78