include/asm-x86/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 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 #else /* CONFIG_X86_64 */
  61
  62 /* Mappings between node number and cpus on that node. */
  63 extern cpumask_t node_to_cpumask_map[];
  64
  65 /* Mappings between logical cpu number and node number */
  66 DECLARE_EARLY_PER_CPU(int, x86_cpu_to_node_map);
  67
  68 /* Returns the number of the current Node. */
  69 #define numa_node_id()  (per_cpu(x86_cpu_to_node_map, raw_smp_processor_id()))
  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 extern cpumask_t *_node_to_cpumask_ptr(int node);
  75 extern cpumask_t node_to_cpumask(int node);
  76
  77 #else   /* !CONFIG_DEBUG_PER_CPU_MAPS */
  78
  79 /* Returns the number of the node containing CPU 'cpu' */
  80 static inline int cpu_to_node(int cpu)
  81 {
  82         return per_cpu(x86_cpu_to_node_map, cpu);
  83 }
  84
  85 /* Same function but used if called before per_cpu areas are setup */
  86 static inline int early_cpu_to_node(int cpu)
  87 {
  88         if (early_per_cpu_ptr(x86_cpu_to_node_map))
  89                 return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu];
  90
  91         return per_cpu(x86_cpu_to_node_map, cpu);
  92 }
  93
  94 /* Returns a pointer to the cpumask of CPUs on Node 'node'. */
  95 static inline cpumask_t *_node_to_cpumask_ptr(int node)
  96 {
  97         return &node_to_cpumask_map[node];
  98 }
  99
 100 /* Returns a bitmask of CPUs on Node 'node'. */
 101 static inline cpumask_t node_to_cpumask(int node)
 102 {
 103         return node_to_cpumask_map[node];
 104 }
 105
 106 #endif /* !CONFIG_DEBUG_PER_CPU_MAPS */
 107 #endif /* CONFIG_X86_64 */
 108
 109 /* Replace default node_to_cpumask_ptr with optimized version */
 110 #define node_to_cpumask_ptr(v, node)            \
 111                 cpumask_t *v = _node_to_cpumask_ptr(node)
 112
 113 #define node_to_cpumask_ptr_next(v, node)       \
 114                            v = _node_to_cpumask_ptr(node)
 115
 116 /* Returns the number of the first CPU on Node 'node'. */
 117 static inline int node_to_first_cpu(int node)
 118 {
 119         node_to_cpumask_ptr(mask, node);
 120         return first_cpu(*mask);
 121 }
 122
 123 /*
 124  * Returns the number of the node containing Node 'node'. This
 125  * architecture is flat, so it is a pretty simple function!
 126  */
 127 #define parent_node(node) (node)
 128
 129 #define pcibus_to_node(bus) __pcibus_to_node(bus)
 130 #define pcibus_to_cpumask(bus) __pcibus_to_cpumask(bus)
 131
 132 #ifdef CONFIG_X86_32
 133 extern unsigned long node_start_pfn[];
 134 extern unsigned long node_end_pfn[];
 135 extern unsigned long node_remap_size[];
 136 #define node_has_online_mem(nid) (node_start_pfn[nid] != node_end_pfn[nid])
 137
 138 # define SD_CACHE_NICE_TRIES    1
 139 # define SD_IDLE_IDX            1
 140 # define SD_NEWIDLE_IDX         2
 141 # define SD_FORKEXEC_IDX        0
 142
 143 #else
 144
 145 # define SD_CACHE_NICE_TRIES    2
 146 # define SD_IDLE_IDX            2
 147 # define SD_NEWIDLE_IDX         2
 148 # define SD_FORKEXEC_IDX        1
 149
 150 #endif
 151
 152 /* sched_domains SD_NODE_INIT for NUMAQ machines */
 153 #define SD_NODE_INIT (struct sched_domain) {            \
 154         .min_interval           = 8,                    \
 155         .max_interval           = 32,                   \
 156         .busy_factor            = 32,                   \
 157         .imbalance_pct          = 125,                  \
 158         .cache_nice_tries       = SD_CACHE_NICE_TRIES,  \
 159         .busy_idx               = 3,                    \
 160         .idle_idx               = SD_IDLE_IDX,          \
 161         .newidle_idx            = SD_NEWIDLE_IDX,       \
 162         .wake_idx               = 1,                    \
 163         .forkexec_idx           = SD_FORKEXEC_IDX,      \
 164         .flags                  = SD_LOAD_BALANCE       \
 165                                 | SD_BALANCE_EXEC       \
 166                                 | SD_BALANCE_FORK       \
 167                                 | SD_SERIALIZE          \
 168                                 | SD_WAKE_BALANCE,      \
 169         .last_balance           = jiffies,              \
 170         .balance_interval       = 1,                    \
 171 }
 172
 173 #ifdef CONFIG_X86_64_ACPI_NUMA
 174 extern int __node_distance(int, int);
 175 #define node_distance(a, b) __node_distance(a, b)
 176 #endif
 177
 178 #else /* !CONFIG_NUMA */
 179
 180 #define numa_node_id()          0
 181 #define cpu_to_node(cpu)        0
 182 #define early_cpu_to_node(cpu)  0
 183
 184 static inline cpumask_t *_node_to_cpumask_ptr(int node)
 185 {
 186         return &cpu_online_map;
 187 }
 188 static inline cpumask_t node_to_cpumask(int node)
 189 {
 190         return cpu_online_map;
 191 }
 192 static inline int node_to_first_cpu(int node)
 193 {
 194         return first_cpu(cpu_online_map);
 195 }
 196
 197 /* Replace default node_to_cpumask_ptr with optimized version */
 198 #define node_to_cpumask_ptr(v, node)            \
 199                 cpumask_t *v = _node_to_cpumask_ptr(node)
 200
 201 #define node_to_cpumask_ptr_next(v, node)       \
 202                            v = _node_to_cpumask_ptr(node)
 203 #endif
 204
 205 #include <asm-generic/topology.h>
 206
 207 extern cpumask_t cpu_coregroup_map(int cpu);
 208
 209 #ifdef ENABLE_TOPO_DEFINES
 210 #define topology_physical_package_id(cpu)       (cpu_data(cpu).phys_proc_id)
 211 #define topology_core_id(cpu)                   (cpu_data(cpu).cpu_core_id)
 212 #define topology_core_siblings(cpu)             (per_cpu(cpu_core_map, cpu))
 213 #define topology_thread_siblings(cpu)           (per_cpu(cpu_sibling_map, cpu))
 214
 215 /* indicates that pointers to the topology cpumask_t maps are valid */
 216 #define arch_provides_topology_pointers         yes
 217 #endif
 218
 219 static inline void arch_fix_phys_package_id(int num, u32 slot)
 220 {
 221 }
 222
 223 struct pci_bus;
 224 void set_pci_bus_resources_arch_default(struct pci_bus *b);
 225
 226 #ifdef CONFIG_SMP
 227 #define mc_capable()                    (boot_cpu_data.x86_max_cores > 1)
 228 #define smt_capable()                   (smp_num_siblings > 1)
 229 #endif
 230
 231 #ifdef CONFIG_NUMA
 232 extern int get_mp_bus_to_node(int busnum);
 233 extern void set_mp_bus_to_node(int busnum, int node);
 234 #else
 235 static inline int get_mp_bus_to_node(int busnum)
 236 {
 237         return 0;
 238 }
 239 static inline void set_mp_bus_to_node(int busnum, int node)
 240 {
 241 }
 242 #endif
 243
 244 #endif /* _ASM_X86_TOPOLOGY_H */