arch/tile/include/asm/topology.h

   1 /*
   2  * Copyright 2010 Tilera Corporation. All Rights Reserved.
   3  *
   4  *   This program is free software; you can redistribute it and/or
   5  *   modify it under the terms of the GNU General Public License
   6  *   as published by the Free Software Foundation, version 2.
   7  *
   8  *   This program is distributed in the hope that it will be useful, but
   9  *   WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  11  *   NON INFRINGEMENT.  See the GNU General Public License for
  12  *   more details.
  13  */
  14
  15 #ifndef _ASM_TILE_TOPOLOGY_H
  16 #define _ASM_TILE_TOPOLOGY_H
  17
  18 #ifdef CONFIG_NUMA
  19
  20 #include <linux/cpumask.h>
  21
  22 /* Mappings between logical cpu number and node number. */
  23 extern struct cpumask node_2_cpu_mask[];
  24 extern char cpu_2_node[];
  25
  26 /* Returns the number of the node containing CPU 'cpu'. */
  27 static inline int cpu_to_node(int cpu)
  28 {
  29         return cpu_2_node[cpu];
  30 }
  31
  32 /*
  33  * Returns the number of the node containing Node 'node'.
  34  * This architecture is flat, so it is a pretty simple function!
  35  */
  36 #define parent_node(node) (node)
  37
  38 /* Returns a bitmask of CPUs on Node 'node'. */
  39 static inline const struct cpumask *cpumask_of_node(int node)
  40 {
  41         return &node_2_cpu_mask[node];
  42 }
  43
  44 /* For now, use numa node -1 for global allocation. */
  45 #define pcibus_to_node(bus)             ((void)(bus), -1)
  46
  47 /* By definition, we create nodes based on online memory. */
  48 #define node_has_online_mem(nid) 1
  49
  50 #endif /* CONFIG_NUMA */
  51
  52 #include <asm-generic/topology.h>
  53
  54 #ifdef CONFIG_SMP
  55 #define topology_physical_package_id(cpu)       ((void)(cpu), 0)
  56 #define topology_core_id(cpu)                   (cpu)
  57 #define topology_core_cpumask(cpu)              ((void)(cpu), cpu_online_mask)
  58 #define topology_sibling_cpumask(cpu)           cpumask_of(cpu)
  59 #endif
  60
  61 #endif /* _ASM_TILE_TOPOLOGY_H */