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 logical cpu number and node number */ 48 extern int cpu_to_node_map[]; 49 50 /* Returns the number of the node containing CPU 'cpu' */ 51 static inline int cpu_to_node(int cpu) 52 { 53 return cpu_to_node_map[cpu]; 54 } 55 #define early_cpu_to_node(cpu) cpu_to_node(cpu) 56 57 #else /* CONFIG_X86_64 */ 58 59 /* Mappings between logical cpu number and node number */ 60 DECLARE_EARLY_PER_CPU(int, x86_cpu_to_node_map); 61 62 /* Returns the number of the current Node. */ 63 DECLARE_PER_CPU(int, node_number); 64 #define numa_node_id() percpu_read(node_number) 65 66 #ifdef CONFIG_DEBUG_PER_CPU_MAPS 67 extern int cpu_to_node(int cpu); 68 extern int early_cpu_to_node(int cpu); 69 70 #else /* !CONFIG_DEBUG_PER_CPU_MAPS */ 71 72 /* Returns the number of the node containing CPU 'cpu' */ 73 static inline int cpu_to_node(int cpu) 74 { 75 return per_cpu(x86_cpu_to_node_map, cpu); 76 } 77 78 /* Same function but used if called before per_cpu areas are setup */ 79 static inline int early_cpu_to_node(int cpu) 80 { 81 return early_per_cpu(x86_cpu_to_node_map, cpu); 82 } 83 84 #endif /* !CONFIG_DEBUG_PER_CPU_MAPS */ 85 86 #endif /* CONFIG_X86_64 */ 87 88 /* Mappings between node number and cpus on that node. */ 89 extern cpumask_var_t node_to_cpumask_map[MAX_NUMNODES]; 90 91 #ifdef CONFIG_DEBUG_PER_CPU_MAPS 92 extern const struct cpumask *cpumask_of_node(int node); 93 #else 94 /* Returns a pointer to the cpumask of CPUs on Node 'node'. */ 95 static inline const struct cpumask *cpumask_of_node(int node) 96 { 97 return node_to_cpumask_map[node]; 98 } 99 #endif 100 101 extern void setup_node_to_cpumask_map(void); 102 103 /* 104 * Returns the number of the node containing Node 'node'. This 105 * architecture is flat, so it is a pretty simple function! 106 */ 107 #define parent_node(node) (node) 108 109 #define pcibus_to_node(bus) __pcibus_to_node(bus) 110 111 #ifdef CONFIG_X86_32 112 extern unsigned long node_start_pfn[]; 113 extern unsigned long node_end_pfn[]; 114 extern unsigned long node_remap_size[]; 115 #define node_has_online_mem(nid) (node_start_pfn[nid] != node_end_pfn[nid]) 116 117 # define SD_CACHE_NICE_TRIES 1 118 # define SD_IDLE_IDX 1 119 # define SD_NEWIDLE_IDX 2 120 # define SD_FORKEXEC_IDX 0 121 122 #else 123 124 # define SD_CACHE_NICE_TRIES 2 125 # define SD_IDLE_IDX 2 126 # define SD_NEWIDLE_IDX 2 127 # define SD_FORKEXEC_IDX 1 128 129 #endif 130 131 /* sched_domains SD_NODE_INIT for NUMA machines */ 132 #define SD_NODE_INIT (struct sched_domain) { \ 133 .min_interval = 8, \ 134 .max_interval = 32, \ 135 .busy_factor = 32, \ 136 .imbalance_pct = 125, \ 137 .cache_nice_tries = SD_CACHE_NICE_TRIES, \ 138 .busy_idx = 3, \ 139 .idle_idx = SD_IDLE_IDX, \ 140 .newidle_idx = SD_NEWIDLE_IDX, \ 141 .wake_idx = 1, \ 142 .forkexec_idx = SD_FORKEXEC_IDX, \ 143 .flags = SD_LOAD_BALANCE \ 144 | SD_BALANCE_EXEC \ 145 | SD_BALANCE_FORK \ 146 | SD_WAKE_AFFINE \ 147 | SD_WAKE_BALANCE \ 148 | SD_SERIALIZE, \ 149 .last_balance = jiffies, \ 150 .balance_interval = 1, \ 151 } 152 153 #ifdef CONFIG_X86_64_ACPI_NUMA 154 extern int __node_distance(int, int); 155 #define node_distance(a, b) __node_distance(a, b) 156 #endif 157 158 #else /* !CONFIG_NUMA */ 159 160 static inline int numa_node_id(void) 161 { 162 return 0; 163 } 164 165 static inline int cpu_to_node(int cpu) 166 { 167 return 0; 168 } 169 170 static inline int early_cpu_to_node(int cpu) 171 { 172 return 0; 173 } 174 175 static inline const struct cpumask *cpumask_of_node(int node) 176 { 177 return cpu_online_mask; 178 } 179 180 static inline void setup_node_to_cpumask_map(void) { } 181 182 #endif 183 184 #include <asm-generic/topology.h> 185 186 extern const struct cpumask *cpu_coregroup_mask(int cpu); 187 188 #ifdef ENABLE_TOPO_DEFINES 189 #define topology_physical_package_id(cpu) (cpu_data(cpu).phys_proc_id) 190 #define topology_core_id(cpu) (cpu_data(cpu).cpu_core_id) 191 #define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu)) 192 #define topology_thread_cpumask(cpu) (per_cpu(cpu_sibling_map, cpu)) 193 194 /* indicates that pointers to the topology cpumask_t maps are valid */ 195 #define arch_provides_topology_pointers yes 196 #endif 197 198 static inline void arch_fix_phys_package_id(int num, u32 slot) 199 { 200 } 201 202 struct pci_bus; 203 void set_pci_bus_resources_arch_default(struct pci_bus *b); 204 205 #ifdef CONFIG_SMP 206 #define mc_capable() (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