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 /* 29 * to preserve the visibility of NUMA_NO_NODE definition, 30 * moved to there from here. May be used independent of 31 * CONFIG_NUMA. 32 */ 33 #include <linux/numa.h> 34 35 #ifdef CONFIG_NUMA 36 #include <linux/cpumask.h> 37 38 #include <asm/mpspec.h> 39 #include <asm/percpu.h> 40 41 /* Mappings between logical cpu number and node number */ 42 DECLARE_EARLY_PER_CPU(int, x86_cpu_to_node_map); 43 44 #ifdef CONFIG_DEBUG_PER_CPU_MAPS 45 /* 46 * override generic percpu implementation of cpu_to_node 47 */ 48 extern int __cpu_to_node(int cpu); 49 #define cpu_to_node __cpu_to_node 50 51 extern int early_cpu_to_node(int cpu); 52 53 #else /* !CONFIG_DEBUG_PER_CPU_MAPS */ 54 55 /* Same function but used if called before per_cpu areas are setup */ 56 static inline int early_cpu_to_node(int cpu) 57 { 58 return early_per_cpu(x86_cpu_to_node_map, cpu); 59 } 60 61 #endif /* !CONFIG_DEBUG_PER_CPU_MAPS */ 62 63 /* Mappings between node number and cpus on that node. */ 64 extern cpumask_var_t node_to_cpumask_map[MAX_NUMNODES]; 65 66 #ifdef CONFIG_DEBUG_PER_CPU_MAPS 67 extern const struct cpumask *cpumask_of_node(int node); 68 #else 69 /* Returns a pointer to the cpumask of CPUs on Node 'node'. */ 70 static inline const struct cpumask *cpumask_of_node(int node) 71 { 72 return node_to_cpumask_map[node]; 73 } 74 #endif 75 76 extern void setup_node_to_cpumask_map(void); 77 78 /* 79 * Returns the number of the node containing Node 'node'. This 80 * architecture is flat, so it is a pretty simple function! 81 */ 82 #define parent_node(node) (node) 83 84 #define pcibus_to_node(bus) __pcibus_to_node(bus) 85 86 extern int __node_distance(int, int); 87 #define node_distance(a, b) __node_distance(a, b) 88 89 #else /* !CONFIG_NUMA */ 90 91 static inline int numa_node_id(void) 92 { 93 return 0; 94 } 95 /* 96 * indicate override: 97 */ 98 #define numa_node_id numa_node_id 99 100 static inline int early_cpu_to_node(int cpu) 101 { 102 return 0; 103 } 104 105 static inline void setup_node_to_cpumask_map(void) { } 106 107 #endif 108 109 #include <asm-generic/topology.h> 110 111 extern const struct cpumask *cpu_coregroup_mask(int cpu); 112 113 #define topology_logical_package_id(cpu) (cpu_data(cpu).logical_proc_id) 114 #define topology_physical_package_id(cpu) (cpu_data(cpu).phys_proc_id) 115 #define topology_core_id(cpu) (cpu_data(cpu).cpu_core_id) 116 117 #ifdef CONFIG_SMP 118 #define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu)) 119 #define topology_sibling_cpumask(cpu) (per_cpu(cpu_sibling_map, cpu)) 120 121 extern unsigned int __max_logical_packages; 122 #define topology_max_packages() (__max_logical_packages) 123 124 extern int __max_smt_threads; 125 126 static inline int topology_max_smt_threads(void) 127 { 128 return __max_smt_threads; 129 } 130 131 int topology_update_package_map(unsigned int apicid, unsigned int cpu); 132 extern int topology_phys_to_logical_pkg(unsigned int pkg); 133 #else 134 #define topology_max_packages() (1) 135 static inline int 136 topology_update_package_map(unsigned int apicid, unsigned int cpu) { return 0; } 137 static inline int topology_phys_to_logical_pkg(unsigned int pkg) { return 0; } 138 static inline int topology_max_smt_threads(void) { return 1; } 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