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 /* Node not present */ 39 #define NUMA_NO_NODE (-1) 40 41 #ifdef CONFIG_NUMA 42 #include <linux/cpumask.h> 43 #include <asm/mpspec.h> 44 45 #ifdef CONFIG_X86_32 46 47 /* Mappings between node number and cpus on that node. */ 48 extern cpumask_t node_to_cpumask_map[]; 49 50 /* Mappings between logical cpu number and node number */ 51 extern int cpu_to_node_map[]; 52 53 /* Returns the number of the node containing CPU 'cpu' */ 54 static inline int cpu_to_node(int cpu) 55 { 56 return cpu_to_node_map[cpu]; 57 } 58 #define early_cpu_to_node(cpu) cpu_to_node(cpu) 59 60 /* Returns a bitmask of CPUs on Node 'node'. 61 * 62 * Side note: this function creates the returned cpumask on the stack 63 * so with a high NR_CPUS count, excessive stack space is used. The 64 * node_to_cpumask_ptr function should be used whenever possible. 65 */ 66 static inline cpumask_t node_to_cpumask(int node) 67 { 68 return node_to_cpumask_map[node]; 69 } 70 71 #else /* CONFIG_X86_64 */ 72 73 /* Mappings between node number and cpus on that node. */ 74 extern cpumask_t *node_to_cpumask_map; 75 76 /* Mappings between logical cpu number and node number */ 77 DECLARE_EARLY_PER_CPU(int, x86_cpu_to_node_map); 78 79 /* Returns the number of the current Node. */ 80 #define numa_node_id() read_pda(nodenumber) 81 82 #ifdef CONFIG_DEBUG_PER_CPU_MAPS 83 extern int cpu_to_node(int cpu); 84 extern int early_cpu_to_node(int cpu); 85 extern const cpumask_t *_node_to_cpumask_ptr(int node); 86 extern cpumask_t node_to_cpumask(int node); 87 88 #else /* !CONFIG_DEBUG_PER_CPU_MAPS */ 89 90 /* Returns the number of the node containing CPU 'cpu' */ 91 static inline int cpu_to_node(int cpu) 92 { 93 return per_cpu(x86_cpu_to_node_map, cpu); 94 } 95 96 /* Same function but used if called before per_cpu areas are setup */ 97 static inline int early_cpu_to_node(int cpu) 98 { 99 if (early_per_cpu_ptr(x86_cpu_to_node_map)) 100 return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu]; 101 102 return per_cpu(x86_cpu_to_node_map, cpu); 103 } 104 105 /* Returns a pointer to the cpumask of CPUs on Node 'node'. */ 106 static inline const cpumask_t *_node_to_cpumask_ptr(int node) 107 { 108 return &node_to_cpumask_map[node]; 109 } 110 111 /* Returns a bitmask of CPUs on Node 'node'. */ 112 static inline cpumask_t node_to_cpumask(int node) 113 { 114 return node_to_cpumask_map[node]; 115 } 116 117 #endif /* !CONFIG_DEBUG_PER_CPU_MAPS */ 118 119 /* Replace default node_to_cpumask_ptr with optimized version */ 120 #define node_to_cpumask_ptr(v, node) \ 121 const cpumask_t *v = _node_to_cpumask_ptr(node) 122 123 #define node_to_cpumask_ptr_next(v, node) \ 124 v = _node_to_cpumask_ptr(node) 125 126 #endif /* CONFIG_X86_64 */ 127 128 /* 129 * Returns the number of the node containing Node 'node'. This 130 * architecture is flat, so it is a pretty simple function! 131 */ 132 #define parent_node(node) (node) 133 134 #define pcibus_to_node(bus) __pcibus_to_node(bus) 135 #define pcibus_to_cpumask(bus) __pcibus_to_cpumask(bus) 136 137 #ifdef CONFIG_X86_32 138 extern unsigned long node_start_pfn[]; 139 extern unsigned long node_end_pfn[]; 140 extern unsigned long node_remap_size[]; 141 #define node_has_online_mem(nid) (node_start_pfn[nid] != node_end_pfn[nid]) 142 143 # define SD_CACHE_NICE_TRIES 1 144 # define SD_IDLE_IDX 1 145 # define SD_NEWIDLE_IDX 2 146 # define SD_FORKEXEC_IDX 0 147 148 #else 149 150 # define SD_CACHE_NICE_TRIES 2 151 # define SD_IDLE_IDX 2 152 # define SD_NEWIDLE_IDX 2 153 # define SD_FORKEXEC_IDX 1 154 155 #endif 156 157 /* sched_domains SD_NODE_INIT for NUMAQ machines */ 158 #define SD_NODE_INIT (struct sched_domain) { \ 159 .min_interval = 8, \ 160 .max_interval = 32, \ 161 .busy_factor = 32, \ 162 .imbalance_pct = 125, \ 163 .cache_nice_tries = SD_CACHE_NICE_TRIES, \ 164 .busy_idx = 3, \ 165 .idle_idx = SD_IDLE_IDX, \ 166 .newidle_idx = SD_NEWIDLE_IDX, \ 167 .wake_idx = 1, \ 168 .forkexec_idx = SD_FORKEXEC_IDX, \ 169 .flags = SD_LOAD_BALANCE \ 170 | SD_BALANCE_EXEC \ 171 | SD_BALANCE_FORK \ 172 | SD_SERIALIZE \ 173 | SD_WAKE_BALANCE, \ 174 .last_balance = jiffies, \ 175 .balance_interval = 1, \ 176 } 177 178 #ifdef CONFIG_X86_64_ACPI_NUMA 179 extern int __node_distance(int, int); 180 #define node_distance(a, b) __node_distance(a, b) 181 #endif 182 183 #else /* !CONFIG_NUMA */ 184 185 #define numa_node_id() 0 186 #define cpu_to_node(cpu) 0 187 #define early_cpu_to_node(cpu) 0 188 189 static inline const cpumask_t *_node_to_cpumask_ptr(int node) 190 { 191 return &cpu_online_map; 192 } 193 static inline cpumask_t node_to_cpumask(int node) 194 { 195 return cpu_online_map; 196 } 197 static inline int node_to_first_cpu(int node) 198 { 199 return first_cpu(cpu_online_map); 200 } 201 202 /* Replace default node_to_cpumask_ptr with optimized version */ 203 #define node_to_cpumask_ptr(v, node) \ 204 const cpumask_t *v = _node_to_cpumask_ptr(node) 205 206 #define node_to_cpumask_ptr_next(v, node) \ 207 v = _node_to_cpumask_ptr(node) 208 #endif 209 210 #include <asm-generic/topology.h> 211 212 #ifdef CONFIG_NUMA 213 /* Returns the number of the first CPU on Node 'node'. */ 214 static inline int node_to_first_cpu(int node) 215 { 216 node_to_cpumask_ptr(mask, node); 217 return first_cpu(*mask); 218 } 219 #endif 220 221 extern cpumask_t cpu_coregroup_map(int cpu); 222 223 #ifdef ENABLE_TOPO_DEFINES 224 #define topology_physical_package_id(cpu) (cpu_data(cpu).phys_proc_id) 225 #define topology_core_id(cpu) (cpu_data(cpu).cpu_core_id) 226 #define topology_core_siblings(cpu) (per_cpu(cpu_core_map, cpu)) 227 #define topology_thread_siblings(cpu) (per_cpu(cpu_sibling_map, cpu)) 228 229 /* indicates that pointers to the topology cpumask_t maps are valid */ 230 #define arch_provides_topology_pointers yes 231 #endif 232 233 static inline void arch_fix_phys_package_id(int num, u32 slot) 234 { 235 } 236 237 struct pci_bus; 238 void set_pci_bus_resources_arch_default(struct pci_bus *b); 239 240 #ifdef CONFIG_SMP 241 #define mc_capable() (boot_cpu_data.x86_max_cores > 1) 242 #define smt_capable() (smp_num_siblings > 1) 243 #endif 244 245 #ifdef CONFIG_NUMA 246 extern int get_mp_bus_to_node(int busnum); 247 extern void set_mp_bus_to_node(int busnum, int node); 248 #else 249 static inline int get_mp_bus_to_node(int busnum) 250 { 251 return 0; 252 } 253 static inline void set_mp_bus_to_node(int busnum, int node) 254 { 255 } 256 #endif 257 258 #endif /* _ASM_X86_TOPOLOGY_H */ 259