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 /* Returns a bitmask of CPUs on Node 'node'.
  61  *
  62  * Side note: this function creates the returned cpumask on the stack
  63  * so with a high NR_CPUS count, excessive stack space is used.  The
  64  * node_to_cpumask_ptr function should be used whenever possible.
  65  */
  66 static inline cpumask_t node_to_cpumask(int node)
  67 {
  68         return node_to_cpumask_map[node];
  69 }
  70
  71 #else /* CONFIG_X86_64 */
  72
  73 /* Mappings between node number and cpus on that node. */
  74 extern cpumask_t *node_to_cpumask_map;
  75
  76 /* Mappings between logical cpu number and node number */
  77 DECLARE_EARLY_PER_CPU(int, x86_cpu_to_node_map);
  78
  79 /* Returns the number of the current Node. */
  80 #define numa_node_id()          read_pda(nodenumber)
  81
  82 #ifdef CONFIG_DEBUG_PER_CPU_MAPS
  83 extern int cpu_to_node(int cpu);
  84 extern int early_cpu_to_node(int cpu);
  85 extern const cpumask_t *_node_to_cpumask_ptr(int node);
  86 extern cpumask_t node_to_cpumask(int node);
  87
  88 #else   /* !CONFIG_DEBUG_PER_CPU_MAPS */
  89
  90 /* Returns the number of the node containing CPU 'cpu' */
  91 static inline int cpu_to_node(int cpu)
  92 {
  93         return per_cpu(x86_cpu_to_node_map, cpu);
  94 }
  95
  96 /* Same function but used if called before per_cpu areas are setup */
  97 static inline int early_cpu_to_node(int cpu)
  98 {
  99         if (early_per_cpu_ptr(x86_cpu_to_node_map))
 100                 return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu];
 101
 102         return per_cpu(x86_cpu_to_node_map, cpu);
 103 }
 104
 105 /* Returns a pointer to the cpumask of CPUs on Node 'node'. */
 106 static inline const cpumask_t *_node_to_cpumask_ptr(int node)
 107 {
 108         return &node_to_cpumask_map[node];
 109 }
 110
 111 /* Returns a bitmask of CPUs on Node 'node'. */
 112 static inline cpumask_t node_to_cpumask(int node)
 113 {
 114         return node_to_cpumask_map[node];
 115 }
 116
 117 #endif /* !CONFIG_DEBUG_PER_CPU_MAPS */
 118
 119 /* Replace default node_to_cpumask_ptr with optimized version */
 120 #define node_to_cpumask_ptr(v, node)            \
 121                 const cpumask_t *v = _node_to_cpumask_ptr(node)
 122
 123 #define node_to_cpumask_ptr_next(v, node)       \
 124                            v = _node_to_cpumask_ptr(node)
 125
 126 #endif /* CONFIG_X86_64 */
 127
 128 /*
 129  * Returns the number of the node containing Node 'node'. This
 130  * architecture is flat, so it is a pretty simple function!
 131  */
 132 #define parent_node(node) (node)
 133
 134 #define pcibus_to_node(bus) __pcibus_to_node(bus)
 135 #define pcibus_to_cpumask(bus) __pcibus_to_cpumask(bus)
 136
 137 #ifdef CONFIG_X86_32
 138 extern unsigned long node_start_pfn[];
 139 extern unsigned long node_end_pfn[];
 140 extern unsigned long node_remap_size[];
 141 #define node_has_online_mem(nid) (node_start_pfn[nid] != node_end_pfn[nid])
 142
 143 # define SD_CACHE_NICE_TRIES    1
 144 # define SD_IDLE_IDX            1
 145 # define SD_NEWIDLE_IDX         2
 146 # define SD_FORKEXEC_IDX        0
 147
 148 #else
 149
 150 # define SD_CACHE_NICE_TRIES    2
 151 # define SD_IDLE_IDX            2
 152 # define SD_NEWIDLE_IDX         2
 153 # define SD_FORKEXEC_IDX        1
 154
 155 #endif
 156
 157 /* sched_domains SD_NODE_INIT for NUMAQ machines */
 158 #define SD_NODE_INIT (struct sched_domain) {            \
 159         .min_interval           = 8,                    \
 160         .max_interval           = 32,                   \
 161         .busy_factor            = 32,                   \
 162         .imbalance_pct          = 125,                  \
 163         .cache_nice_tries       = SD_CACHE_NICE_TRIES,  \
 164         .busy_idx               = 3,                    \
 165         .idle_idx               = SD_IDLE_IDX,          \
 166         .newidle_idx            = SD_NEWIDLE_IDX,       \
 167         .wake_idx               = 1,                    \
 168         .forkexec_idx           = SD_FORKEXEC_IDX,      \
 169         .flags                  = SD_LOAD_BALANCE       \
 170                                 | SD_BALANCE_EXEC       \
 171                                 | SD_BALANCE_FORK       \
 172                                 | SD_SERIALIZE          \
 173                                 | SD_WAKE_BALANCE,      \
 174         .last_balance           = jiffies,              \
 175         .balance_interval       = 1,                    \
 176 }
 177
 178 #ifdef CONFIG_X86_64_ACPI_NUMA
 179 extern int __node_distance(int, int);
 180 #define node_distance(a, b) __node_distance(a, b)
 181 #endif
 182
 183 #else /* !CONFIG_NUMA */
 184
 185 #define numa_node_id()          0
 186 #define cpu_to_node(cpu)        0
 187 #define early_cpu_to_node(cpu)  0
 188
 189 static inline const cpumask_t *_node_to_cpumask_ptr(int node)
 190 {
 191         return &cpu_online_map;
 192 }
 193 static inline cpumask_t node_to_cpumask(int node)
 194 {
 195         return cpu_online_map;
 196 }
 197 static inline int node_to_first_cpu(int node)
 198 {
 199         return first_cpu(cpu_online_map);
 200 }
 201
 202 /* Replace default node_to_cpumask_ptr with optimized version */
 203 #define node_to_cpumask_ptr(v, node)            \
 204                 const cpumask_t *v = _node_to_cpumask_ptr(node)
 205
 206 #define node_to_cpumask_ptr_next(v, node)       \
 207                            v = _node_to_cpumask_ptr(node)
 208 #endif
 209
 210 #include <asm-generic/topology.h>
 211
 212 #ifdef CONFIG_NUMA
 213 /* Returns the number of the first CPU on Node 'node'. */
 214 static inline int node_to_first_cpu(int node)
 215 {
 216         node_to_cpumask_ptr(mask, node);
 217         return first_cpu(*mask);
 218 }
 219 #endif
 220
 221 extern cpumask_t cpu_coregroup_map(int cpu);
 222
 223 #ifdef ENABLE_TOPO_DEFINES
 224 #define topology_physical_package_id(cpu)       (cpu_data(cpu).phys_proc_id)
 225 #define topology_core_id(cpu)                   (cpu_data(cpu).cpu_core_id)
 226 #define topology_core_siblings(cpu)             (per_cpu(cpu_core_map, cpu))
 227 #define topology_thread_siblings(cpu)           (per_cpu(cpu_sibling_map, cpu))
 228
 229 /* indicates that pointers to the topology cpumask_t maps are valid */
 230 #define arch_provides_topology_pointers         yes
 231 #endif
 232
 233 static inline void arch_fix_phys_package_id(int num, u32 slot)
 234 {
 235 }
 236
 237 struct pci_bus;
 238 void set_pci_bus_resources_arch_default(struct pci_bus *b);
 239
 240 #ifdef CONFIG_SMP
 241 #define mc_capable()                    (boot_cpu_data.x86_max_cores > 1)
 242 #define smt_capable()                   (smp_num_siblings > 1)
 243 #endif
 244
 245 #ifdef CONFIG_NUMA
 246 extern int get_mp_bus_to_node(int busnum);
 247 extern void set_mp_bus_to_node(int busnum, int node);
 248 #else
 249 static inline int get_mp_bus_to_node(int busnum)
 250 {
 251         return 0;
 252 }
 253 static inline void set_mp_bus_to_node(int busnum, int node)
 254 {
 255 }
 256 #endif
 257
 258 #endif /* _ASM_X86_TOPOLOGY_H */