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  1. /*
  2.  * Written by: Matthew Dobson, IBM Corporation
  3.  *
  4.  * Copyright (C) 2002, IBM Corp.
  5.  *
  6.  * All rights reserved.
  7.  *
  8.  * This program is free software; you can redistribute it and/or modify
  9.  * it under the terms of the GNU General Public License as published by
  10.  * the Free Software Foundation; either version 2 of the License, or
  11.  * (at your option) any later version.
  12.  *
  13.  * This program is distributed in the hope that it will be useful, but
  14.  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15.  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  16.  * NON INFRINGEMENT.  See the GNU General Public License for more
  17.  * details.
  18.  *
  19.  * You should have received a copy of the GNU General Public License
  20.  * along with this program; if not, write to the Free Software
  21.  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22.  *
  23.  * Send feedback to <colpatch@us.ibm.com>
  24.  */
  25. #ifndef _ASM_X86_TOPOLOGY_H
  26. #define _ASM_X86_TOPOLOGY_H
  27.  
  28. #ifdef CONFIG_X86_32
  29. # ifdef CONFIG_SMP
  30. #  define ENABLE_TOPO_DEFINES
  31. # endif
  32. #else
  33. # ifdef CONFIG_SMP
  34. #  define ENABLE_TOPO_DEFINES
  35. # endif
  36. #endif
  37.  
  38. /*
  39.  * to preserve the visibility of NUMA_NO_NODE definition,
  40.  * moved to there from here.  May be used independent of
  41.  * CONFIG_NUMA.
  42.  */
  43. #include <linux/numa.h>
  44.  
  45. #ifdef CONFIG_NUMA
  46. #include <linux/cpumask.h>
  47.  
  48. #include <asm/mpspec.h>
  49.  
  50. /* Mappings between logical cpu number and node number */
  51. DECLARE_EARLY_PER_CPU(int, x86_cpu_to_node_map);
  52.  
  53. #ifdef CONFIG_DEBUG_PER_CPU_MAPS
  54. /*
  55.  * override generic percpu implementation of cpu_to_node
  56.  */
  57. extern int __cpu_to_node(int cpu);
  58. #define cpu_to_node __cpu_to_node
  59.  
  60. extern int early_cpu_to_node(int cpu);
  61.  
  62. #else   /* !CONFIG_DEBUG_PER_CPU_MAPS */
  63.  
  64. /* Same function but used if called before per_cpu areas are setup */
  65. static inline int early_cpu_to_node(int cpu)
  66. {
  67.         return early_per_cpu(x86_cpu_to_node_map, cpu);
  68. }
  69.  
  70. #endif /* !CONFIG_DEBUG_PER_CPU_MAPS */
  71.  
  72. /* Mappings between node number and cpus on that node. */
  73. extern cpumask_var_t node_to_cpumask_map[MAX_NUMNODES];
  74.  
  75. #ifdef CONFIG_DEBUG_PER_CPU_MAPS
  76. extern const struct cpumask *cpumask_of_node(int node);
  77. #else
  78. /* Returns a pointer to the cpumask of CPUs on Node 'node'. */
  79. static inline const struct cpumask *cpumask_of_node(int node)
  80. {
  81.         return node_to_cpumask_map[node];
  82. }
  83. #endif
  84.  
  85. extern void setup_node_to_cpumask_map(void);
  86.  
  87. /*
  88.  * Returns the number of the node containing Node 'node'. This
  89.  * architecture is flat, so it is a pretty simple function!
  90.  */
  91. #define parent_node(node) (node)
  92.  
  93. #define pcibus_to_node(bus) __pcibus_to_node(bus)
  94.  
  95. extern int __node_distance(int, int);
  96. #define node_distance(a, b) __node_distance(a, b)
  97.  
  98. #else /* !CONFIG_NUMA */
  99.  
  100. static inline int numa_node_id(void)
  101. {
  102.         return 0;
  103. }
  104. /*
  105.  * indicate override:
  106.  */
  107. #define numa_node_id numa_node_id
  108.  
  109. static inline int early_cpu_to_node(int cpu)
  110. {
  111.         return 0;
  112. }
  113.  
  114. static inline void setup_node_to_cpumask_map(void) { }
  115.  
  116. #endif
  117.  
  118. #include <asm-generic/topology.h>
  119.  
  120. extern const struct cpumask *cpu_coregroup_mask(int cpu);
  121.  
  122. #define topology_logical_package_id(cpu)        (cpu_data(cpu).logical_proc_id)
  123. #define topology_physical_package_id(cpu)       (cpu_data(cpu).phys_proc_id)
  124. #define topology_core_id(cpu)                   (cpu_data(cpu).cpu_core_id)
  125.  
  126. #ifdef ENABLE_TOPO_DEFINES
  127. #define topology_core_cpumask(cpu)              (per_cpu(cpu_core_map, cpu))
  128. #define topology_sibling_cpumask(cpu)           (per_cpu(cpu_sibling_map, cpu))
  129.  
  130. extern unsigned int __max_logical_packages;
  131. #define topology_max_packages()                 (__max_logical_packages)
  132. int topology_update_package_map(unsigned int apicid, unsigned int cpu);
  133. extern int topology_phys_to_logical_pkg(unsigned int pkg);
  134. #else
  135. #define topology_max_packages()                 (1)
  136. static inline int
  137. topology_update_package_map(unsigned int apicid, unsigned int cpu) { return 0; }
  138. static inline int topology_phys_to_logical_pkg(unsigned int pkg) { return 0; }
  139. #endif
  140.  
  141. static inline void arch_fix_phys_package_id(int num, u32 slot)
  142. {
  143. }
  144.  
  145. struct pci_bus;
  146. int x86_pci_root_bus_node(int bus);
  147. void x86_pci_root_bus_resources(int bus, struct list_head *resources);
  148.  
  149. #endif /* _ASM_X86_TOPOLOGY_H */
  150.