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