arch/x86/include/asm/topology.h

   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
 120 #else
 121
 122 # define SD_CACHE_NICE_TRIES    2
 123 # define SD_IDLE_IDX            2
 124
 125 #endif
 126
 127 /* sched_domains SD_NODE_INIT for NUMA machines */
 128 #define SD_NODE_INIT (struct sched_domain) {                            \
 129         .min_interval           = 8,                                    \
 130         .max_interval           = 32,                                   \
 131         .busy_factor            = 32,                                   \
 132         .imbalance_pct          = 125,                                  \
 133         .cache_nice_tries       = SD_CACHE_NICE_TRIES,                  \
 134         .busy_idx               = 3,                                    \
 135         .idle_idx               = SD_IDLE_IDX,                          \
 136         .newidle_idx            = 0,                                    \
 137         .wake_idx               = 0,                                    \
 138         .forkexec_idx           = 0,                                    \
 139                                                                         \
 140         .flags                  = 1*SD_LOAD_BALANCE                     \
 141                                 | 1*SD_BALANCE_NEWIDLE                  \
 142                                 | 1*SD_BALANCE_EXEC                     \
 143                                 | 1*SD_BALANCE_FORK                     \
 144                                 | 0*SD_BALANCE_WAKE                     \
 145                                 | 1*SD_WAKE_AFFINE                      \
 146                                 | 0*SD_SHARE_CPUPOWER                   \
 147                                 | 0*SD_POWERSAVINGS_BALANCE             \
 148                                 | 0*SD_SHARE_PKG_RESOURCES              \
 149                                 | 1*SD_SERIALIZE                        \
 150                                 | 0*SD_PREFER_SIBLING                   \
 151                                 ,                                       \
 152         .last_balance           = jiffies,                              \
 153         .balance_interval       = 1,                                    \
 154 }
 155
 156 #ifdef CONFIG_X86_64_ACPI_NUMA
 157 extern int __node_distance(int, int);
 158 #define node_distance(a, b) __node_distance(a, b)
 159 #endif
 160
 161 #else /* !CONFIG_NUMA */
 162
 163 static inline int numa_node_id(void)
 164 {
 165         return 0;
 166 }
 167
 168 static inline int cpu_to_node(int cpu)
 169 {
 170         return 0;
 171 }
 172
 173 static inline int early_cpu_to_node(int cpu)
 174 {
 175         return 0;
 176 }
 177
 178 static inline const struct cpumask *cpumask_of_node(int node)
 179 {
 180         return cpu_online_mask;
 181 }
 182
 183 static inline void setup_node_to_cpumask_map(void) { }
 184
 185 #endif
 186
 187 #include <asm-generic/topology.h>
 188
 189 extern const struct cpumask *cpu_coregroup_mask(int cpu);
 190
 191 #ifdef ENABLE_TOPO_DEFINES
 192 #define topology_physical_package_id(cpu)       (cpu_data(cpu).phys_proc_id)
 193 #define topology_core_id(cpu)                   (cpu_data(cpu).cpu_core_id)
 194 #define topology_core_cpumask(cpu)              (per_cpu(cpu_core_map, cpu))
 195 #define topology_thread_cpumask(cpu)            (per_cpu(cpu_sibling_map, cpu))
 196
 197 /* indicates that pointers to the topology cpumask_t maps are valid */
 198 #define arch_provides_topology_pointers         yes
 199 #endif
 200
 201 static inline void arch_fix_phys_package_id(int num, u32 slot)
 202 {
 203 }
 204
 205 struct pci_bus;
 206 void x86_pci_root_bus_res_quirks(struct pci_bus *b);
 207
 208 #ifdef CONFIG_SMP
 209 #define mc_capable()    ((boot_cpu_data.x86_max_cores > 1) && \
 210                         (cpumask_weight(cpu_core_mask(0)) != nr_cpu_ids))
 211 #define smt_capable()                   (smp_num_siblings > 1)
 212 #endif
 213
 214 #ifdef CONFIG_NUMA
 215 extern int get_mp_bus_to_node(int busnum);
 216 extern void set_mp_bus_to_node(int busnum, int node);
 217 #else
 218 static inline int get_mp_bus_to_node(int busnum)
 219 {
 220         return 0;
 221 }
 222 static inline void set_mp_bus_to_node(int busnum, int node)
 223 {
 224 }
 225 #endif
 226
 227 #endif /* _ASM_X86_TOPOLOGY_H */