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 #ifdef CONFIG_NUMA
  39 #include <linux/cpumask.h>
  40 #include <asm/mpspec.h>
  41
  42 /* Mappings between logical cpu number and node number */
  43 #ifdef CONFIG_X86_32
  44 extern int cpu_to_node_map[];
  45 #else
  46 /* Returns the number of the current Node. */
  47 #define numa_node_id()          (early_cpu_to_node(raw_smp_processor_id()))
  48 #endif
  49
  50 DECLARE_PER_CPU(int, x86_cpu_to_node_map);
  51
  52 #ifdef CONFIG_SMP
  53 extern int x86_cpu_to_node_map_init[];
  54 extern void *x86_cpu_to_node_map_early_ptr;
  55 #else
  56 #define x86_cpu_to_node_map_early_ptr NULL
  57 #endif
  58
  59 extern cpumask_t node_to_cpumask_map[];
  60
  61 #define NUMA_NO_NODE    (-1)
  62
  63 /* Returns the number of the node containing CPU 'cpu' */
  64 #ifdef CONFIG_X86_32
  65 #define early_cpu_to_node(cpu)  cpu_to_node(cpu)
  66 static inline int cpu_to_node(int cpu)
  67 {
  68         return cpu_to_node_map[cpu];
  69 }
  70
  71 #else /* CONFIG_X86_64 */
  72
  73 #ifdef CONFIG_SMP
  74 static inline int early_cpu_to_node(int cpu)
  75 {
  76         int *cpu_to_node_map = x86_cpu_to_node_map_early_ptr;
  77
  78         if (cpu_to_node_map)
  79                 return cpu_to_node_map[cpu];
  80         else if (per_cpu_offset(cpu))
  81                 return per_cpu(x86_cpu_to_node_map, cpu);
  82         else
  83                 return NUMA_NO_NODE;
  84 }
  85 #else
  86 #define early_cpu_to_node(cpu)  cpu_to_node(cpu)
  87 #endif
  88
  89 static inline int cpu_to_node(int cpu)
  90 {
  91 #ifdef CONFIG_DEBUG_PER_CPU_MAPS
  92         if (x86_cpu_to_node_map_early_ptr) {
  93                 printk("KERN_NOTICE cpu_to_node(%d): usage too early!\n",
  94                        (int)cpu);
  95                 dump_stack();
  96                 return ((int *)x86_cpu_to_node_map_early_ptr)[cpu];
  97         }
  98 #endif
  99         return per_cpu(x86_cpu_to_node_map, cpu);
 100 }
 101
 102 #ifdef  CONFIG_NUMA
 103
 104 /* Returns a pointer to the cpumask of CPUs on Node 'node'. */
 105 #define node_to_cpumask_ptr(v, node)            \
 106                 cpumask_t *v = &(node_to_cpumask_map[node])
 107
 108 #define node_to_cpumask_ptr_next(v, node)       \
 109                            v = &(node_to_cpumask_map[node])
 110 #endif
 111
 112 #endif /* CONFIG_X86_64 */
 113
 114 /*
 115  * Returns the number of the node containing Node 'node'. This
 116  * architecture is flat, so it is a pretty simple function!
 117  */
 118 #define parent_node(node) (node)
 119
 120 /* Returns a bitmask of CPUs on Node 'node'. */
 121 static inline cpumask_t node_to_cpumask(int node)
 122 {
 123         return node_to_cpumask_map[node];
 124 }
 125
 126 /* Returns the number of the first CPU on Node 'node'. */
 127 static inline int node_to_first_cpu(int node)
 128 {
 129         cpumask_t mask = node_to_cpumask(node);
 130
 131         return first_cpu(mask);
 132 }
 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 #endif
 186
 187 #include <asm-generic/topology.h>
 188
 189 extern cpumask_t cpu_coregroup_map(int cpu);
 190
 191 #ifdef ENABLE_TOPO_DEFINES
 192 #define topology_physical_package_id(cpu)       (cpu_data(cpu).phys_proc_id)
 193 #define topology_core_id(cpu)                   (cpu_data(cpu).cpu_core_id)
 194 #define topology_core_siblings(cpu)             (per_cpu(cpu_core_map, cpu))
 195 #define topology_thread_siblings(cpu)           (per_cpu(cpu_sibling_map, cpu))
 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 set_pci_bus_resources_arch_default(struct pci_bus *b);
 204
 205 #ifdef CONFIG_SMP
 206 #define mc_capable()                    (boot_cpu_data.x86_max_cores > 1)
 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