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 /*
  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 /* Mappings between logical cpu number and node number */
  51 DECLARE_EARLY_PER_CPU(int, x86_cpu_to_node_map);
  52
  53 #ifdef CONFIG_DEBUG_PER_CPU_MAPS
  54 /*
  55  * override generic percpu implementation of cpu_to_node
  56  */
  57 extern int __cpu_to_node(int cpu);
  58 #define cpu_to_node __cpu_to_node
  59
  60 extern int early_cpu_to_node(int cpu);
  61
  62 #else   /* !CONFIG_DEBUG_PER_CPU_MAPS */
  63
  64 /* Same function but used if called before per_cpu areas are setup */
  65 static inline int early_cpu_to_node(int cpu)
  66 {
  67         return early_per_cpu(x86_cpu_to_node_map, cpu);
  68 }
  69
  70 #endif /* !CONFIG_DEBUG_PER_CPU_MAPS */
  71
  72 /* Mappings between node number and cpus on that node. */
  73 extern cpumask_var_t node_to_cpumask_map[MAX_NUMNODES];
  74
  75 #ifdef CONFIG_DEBUG_PER_CPU_MAPS
  76 extern const struct cpumask *cpumask_of_node(int node);
  77 #else
  78 /* Returns a pointer to the cpumask of CPUs on Node 'node'. */
  79 static inline const struct cpumask *cpumask_of_node(int node)
  80 {
  81         return node_to_cpumask_map[node];
  82 }
  83 #endif
  84
  85 extern void setup_node_to_cpumask_map(void);
  86
  87 /*
  88  * Returns the number of the node containing Node 'node'. This
  89  * architecture is flat, so it is a pretty simple function!
  90  */
  91 #define parent_node(node) (node)
  92
  93 #define pcibus_to_node(bus) __pcibus_to_node(bus)
  94
  95 #ifdef CONFIG_X86_32
  96 # define SD_CACHE_NICE_TRIES    1
  97 # define SD_IDLE_IDX            1
  98 #else
  99 # define SD_CACHE_NICE_TRIES    2
 100 # define SD_IDLE_IDX            2
 101 #endif
 102
 103 /* sched_domains SD_NODE_INIT for NUMA machines */
 104 #define SD_NODE_INIT (struct sched_domain) {                            \
 105         .min_interval           = 8,                                    \
 106         .max_interval           = 32,                                   \
 107         .busy_factor            = 32,                                   \
 108         .imbalance_pct          = 125,                                  \
 109         .cache_nice_tries       = SD_CACHE_NICE_TRIES,                  \
 110         .busy_idx               = 3,                                    \
 111         .idle_idx               = SD_IDLE_IDX,                          \
 112         .newidle_idx            = 0,                                    \
 113         .wake_idx               = 0,                                    \
 114         .forkexec_idx           = 0,                                    \
 115                                                                         \
 116         .flags                  = 1*SD_LOAD_BALANCE                     \
 117                                 | 1*SD_BALANCE_NEWIDLE                  \
 118                                 | 1*SD_BALANCE_EXEC                     \
 119                                 | 1*SD_BALANCE_FORK                     \
 120                                 | 0*SD_BALANCE_WAKE                     \
 121                                 | 1*SD_WAKE_AFFINE                      \
 122                                 | 0*SD_PREFER_LOCAL                     \
 123                                 | 0*SD_SHARE_CPUPOWER                   \
 124                                 | 0*SD_POWERSAVINGS_BALANCE             \
 125                                 | 0*SD_SHARE_PKG_RESOURCES              \
 126                                 | 1*SD_SERIALIZE                        \
 127                                 | 0*SD_PREFER_SIBLING                   \
 128                                 ,                                       \
 129         .last_balance           = jiffies,                              \
 130         .balance_interval       = 1,                                    \
 131 }
 132
 133 extern int __node_distance(int, int);
 134 #define node_distance(a, b) __node_distance(a, b)
 135
 136 #else /* !CONFIG_NUMA */
 137
 138 static inline int numa_node_id(void)
 139 {
 140         return 0;
 141 }
 142 /*
 143  * indicate override:
 144  */
 145 #define numa_node_id numa_node_id
 146
 147 static inline int early_cpu_to_node(int cpu)
 148 {
 149         return 0;
 150 }
 151
 152 static inline void setup_node_to_cpumask_map(void) { }
 153
 154 #endif
 155
 156 #include <asm-generic/topology.h>
 157
 158 extern const struct cpumask *cpu_coregroup_mask(int cpu);
 159
 160 #ifdef ENABLE_TOPO_DEFINES
 161 #define topology_physical_package_id(cpu)       (cpu_data(cpu).phys_proc_id)
 162 #define topology_core_id(cpu)                   (cpu_data(cpu).cpu_core_id)
 163 #define topology_core_cpumask(cpu)              (per_cpu(cpu_core_map, cpu))
 164 #define topology_thread_cpumask(cpu)            (per_cpu(cpu_sibling_map, cpu))
 165
 166 /* indicates that pointers to the topology cpumask_t maps are valid */
 167 #define arch_provides_topology_pointers         yes
 168 #endif
 169
 170 static inline void arch_fix_phys_package_id(int num, u32 slot)
 171 {
 172 }
 173
 174 struct pci_bus;
 175 void x86_pci_root_bus_resources(int bus, struct list_head *resources);
 176
 177 #ifdef CONFIG_SMP
 178 #define mc_capable()    ((boot_cpu_data.x86_max_cores > 1) && \
 179                         (cpumask_weight(cpu_core_mask(0)) != nr_cpu_ids))
 180 #define smt_capable()                   (smp_num_siblings > 1)
 181 #endif
 182
 183 #ifdef CONFIG_NUMA
 184 extern int get_mp_bus_to_node(int busnum);
 185 extern void set_mp_bus_to_node(int busnum, int node);
 186 #else
 187 static inline int get_mp_bus_to_node(int busnum)
 188 {
 189         return 0;
 190 }
 191 static inline void set_mp_bus_to_node(int busnum, int node)
 192 {
 193 }
 194 #endif
 195
 196 #endif /* _ASM_X86_TOPOLOGY_H */