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_physical_package_id(cpu) (cpu_data(cpu).phys_proc_id) 123 #define topology_core_id(cpu) (cpu_data(cpu).cpu_core_id) 124 125 #ifdef ENABLE_TOPO_DEFINES 126 #define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu)) 127 #define topology_sibling_cpumask(cpu) (per_cpu(cpu_sibling_map, cpu)) 128 #endif 129 130 static inline void arch_fix_phys_package_id(int num, u32 slot) 131 { 132 } 133 134 struct pci_bus; 135 int x86_pci_root_bus_node(int bus); 136 void x86_pci_root_bus_resources(int bus, struct list_head *resources); 137 138 #endif /* _ASM_X86_TOPOLOGY_H */ 139