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 #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 */