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_X86_HT 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 #ifdef CONFIG_X86_32 51 52 /* Mappings between logical cpu number and node number */ 53 extern int cpu_to_node_map[]; 54 55 /* Returns the number of the node containing CPU 'cpu' */ 56 static inline int cpu_to_node(int cpu) 57 { 58 return cpu_to_node_map[cpu]; 59 } 60 #define early_cpu_to_node(cpu) cpu_to_node(cpu) 61 62 #else /* CONFIG_X86_64 */ 63 64 /* Mappings between logical cpu number and node number */ 65 DECLARE_EARLY_PER_CPU(int, x86_cpu_to_node_map); 66 67 /* Returns the number of the current Node. */ 68 DECLARE_PER_CPU(int, node_number); 69 #define numa_node_id() percpu_read(node_number) 70 71 #ifdef CONFIG_DEBUG_PER_CPU_MAPS 72 extern int cpu_to_node(int cpu); 73 extern int early_cpu_to_node(int cpu); 74 75 #else /* !CONFIG_DEBUG_PER_CPU_MAPS */ 76 77 /* Returns the number of the node containing CPU 'cpu' */ 78 static inline int cpu_to_node(int cpu) 79 { 80 return per_cpu(x86_cpu_to_node_map, cpu); 81 } 82 83 /* Same function but used if called before per_cpu areas are setup */ 84 static inline int early_cpu_to_node(int cpu) 85 { 86 return early_per_cpu(x86_cpu_to_node_map, cpu); 87 } 88 89 #endif /* !CONFIG_DEBUG_PER_CPU_MAPS */ 90 91 #endif /* CONFIG_X86_64 */ 92 93 /* Mappings between node number and cpus on that node. */ 94 extern cpumask_var_t node_to_cpumask_map[MAX_NUMNODES]; 95 96 #ifdef CONFIG_DEBUG_PER_CPU_MAPS 97 extern const struct cpumask *cpumask_of_node(int node); 98 #else 99 /* Returns a pointer to the cpumask of CPUs on Node 'node'. */ 100 static inline const struct cpumask *cpumask_of_node(int node) 101 { 102 return node_to_cpumask_map[node]; 103 } 104 #endif 105 106 extern void setup_node_to_cpumask_map(void); 107 108 /* 109 * Returns the number of the node containing Node 'node'. This 110 * architecture is flat, so it is a pretty simple function! 111 */ 112 #define parent_node(node) (node) 113 114 #define pcibus_to_node(bus) __pcibus_to_node(bus) 115 116 #ifdef CONFIG_X86_32 117 extern unsigned long node_start_pfn[]; 118 extern unsigned long node_end_pfn[]; 119 extern unsigned long node_remap_size[]; 120 #define node_has_online_mem(nid) (node_start_pfn[nid] != node_end_pfn[nid]) 121 122 # define SD_CACHE_NICE_TRIES 1 123 # define SD_IDLE_IDX 1 124 125 #else 126 127 # define SD_CACHE_NICE_TRIES 2 128 # define SD_IDLE_IDX 2 129 130 #endif 131 132 /* sched_domains SD_NODE_INIT for NUMA machines */ 133 #define SD_NODE_INIT (struct sched_domain) { \ 134 .min_interval = 8, \ 135 .max_interval = 32, \ 136 .busy_factor = 32, \ 137 .imbalance_pct = 125, \ 138 .cache_nice_tries = SD_CACHE_NICE_TRIES, \ 139 .busy_idx = 3, \ 140 .idle_idx = SD_IDLE_IDX, \ 141 .newidle_idx = 0, \ 142 .wake_idx = 0, \ 143 .forkexec_idx = 0, \ 144 \ 145 .flags = 1*SD_LOAD_BALANCE \ 146 | 1*SD_BALANCE_NEWIDLE \ 147 | 1*SD_BALANCE_EXEC \ 148 | 1*SD_BALANCE_FORK \ 149 | 0*SD_BALANCE_WAKE \ 150 | 1*SD_WAKE_AFFINE \ 151 | 0*SD_PREFER_LOCAL \ 152 | 0*SD_SHARE_CPUPOWER \ 153 | 0*SD_POWERSAVINGS_BALANCE \ 154 | 0*SD_SHARE_PKG_RESOURCES \ 155 | 1*SD_SERIALIZE \ 156 | 0*SD_PREFER_SIBLING \ 157 , \ 158 .last_balance = jiffies, \ 159 .balance_interval = 1, \ 160 } 161 162 #ifdef CONFIG_X86_64_ACPI_NUMA 163 extern int __node_distance(int, int); 164 #define node_distance(a, b) __node_distance(a, b) 165 #endif 166 167 #else /* !CONFIG_NUMA */ 168 169 static inline int numa_node_id(void) 170 { 171 return 0; 172 } 173 174 static inline int early_cpu_to_node(int cpu) 175 { 176 return 0; 177 } 178 179 static inline void setup_node_to_cpumask_map(void) { } 180 181 #endif 182 183 #include <asm-generic/topology.h> 184 185 extern const struct cpumask *cpu_coregroup_mask(int cpu); 186 187 #ifdef ENABLE_TOPO_DEFINES 188 #define topology_physical_package_id(cpu) (cpu_data(cpu).phys_proc_id) 189 #define topology_core_id(cpu) (cpu_data(cpu).cpu_core_id) 190 #define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu)) 191 #define topology_thread_cpumask(cpu) (per_cpu(cpu_sibling_map, cpu)) 192 193 /* indicates that pointers to the topology cpumask_t maps are valid */ 194 #define arch_provides_topology_pointers yes 195 #endif 196 197 static inline void arch_fix_phys_package_id(int num, u32 slot) 198 { 199 } 200 201 struct pci_bus; 202 void x86_pci_root_bus_res_quirks(struct pci_bus *b); 203 204 #ifdef CONFIG_SMP 205 #define mc_capable() ((boot_cpu_data.x86_max_cores > 1) && \ 206 (cpumask_weight(cpu_core_mask(0)) != nr_cpu_ids)) 207 #define smt_capable() (smp_num_siblings > 1) 208 #endif 209 210 #ifdef CONFIG_NUMA 211 extern int get_mp_bus_to_node(int busnum); 212 extern void set_mp_bus_to_node(int busnum, int node); 213 #else 214 static inline int get_mp_bus_to_node(int busnum) 215 { 216 return 0; 217 } 218 static inline void set_mp_bus_to_node(int busnum, int node) 219 { 220 } 221 #endif 222 223 #endif /* _ASM_X86_TOPOLOGY_H */ 224