LXR linux/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 */
  48extern int cpu_to_node_map[];
  49
  50/* Returns the number of the node containing CPU 'cpu' */
  51static 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 */
  60DECLARE_EARLY_PER_CPU(int, x86_cpu_to_node_map);
  61
  62/* Returns the number of the current Node. */
  63DECLARE_PER_CPU(int, node_number);
  64#define numa_node_id()          percpu_read(node_number)
  65
  66#ifdef CONFIG_DEBUG_PER_CPU_MAPS
  67extern int cpu_to_node(int cpu);
  68extern 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' */
  73static 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 */
  79static 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. */
  89extern cpumask_var_t node_to_cpumask_map[MAX_NUMNODES];
  90
  91#ifdef CONFIG_DEBUG_PER_CPU_MAPS
  92extern const struct cpumask *cpumask_of_node(int node);
  93#else
  94/* Returns a pointer to the cpumask of CPUs on Node 'node'. */
  95static inline const struct cpumask *cpumask_of_node(int node)
  96{
  97        return node_to_cpumask_map[node];
  98}
  99#endif
 100
 101extern 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
 112extern unsigned long node_start_pfn[];
 113extern unsigned long node_end_pfn[];
 114extern 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
 120#else
 121
 122# define SD_CACHE_NICE_TRIES    2
 123# define SD_IDLE_IDX            2
 124
 125#endif
 126
 127/* sched_domains SD_NODE_INIT for NUMA machines */
 128#define SD_NODE_INIT (struct sched_domain) {                            \
 129        .min_interval           = 8,                                    \
 130        .max_interval           = 32,                                   \
 131        .busy_factor            = 32,                                   \
 132        .imbalance_pct          = 125,                                  \
 133        .cache_nice_tries       = SD_CACHE_NICE_TRIES,                  \
 134        .busy_idx               = 3,                                    \
 135        .idle_idx               = SD_IDLE_IDX,                          \
 136        .newidle_idx            = 0,                                    \
 137        .wake_idx               = 0,                                    \
 138        .forkexec_idx           = 0,                                    \
 139                                                                        \
 140        .flags                  = 1*SD_LOAD_BALANCE                     \
 141                                | 1*SD_BALANCE_NEWIDLE                  \
 142                                | 1*SD_BALANCE_EXEC                     \
 143                                | 1*SD_BALANCE_FORK                     \
 144                                | 0*SD_BALANCE_WAKE                     \
 145                                | 1*SD_WAKE_AFFINE                      \
 146                                | 0*SD_PREFER_LOCAL                     \
 147                                | 0*SD_SHARE_CPUPOWER                   \
 148                                | 0*SD_POWERSAVINGS_BALANCE             \
 149                                | 0*SD_SHARE_PKG_RESOURCES              \
 150                                | 1*SD_SERIALIZE                        \
 151                                | 0*SD_PREFER_SIBLING                   \
 152                                ,                                       \
 153        .last_balance           = jiffies,                              \
 154        .balance_interval       = 1,                                    \
 155}
 156
 157#ifdef CONFIG_X86_64_ACPI_NUMA
 158extern int __node_distance(int, int);
 159#define node_distance(a, b) __node_distance(a, b)
 160#endif
 161
 162#else /* !CONFIG_NUMA */
 163
 164static inline int numa_node_id(void)
 165{
 166        return 0;
 167}
 168
 169static inline int early_cpu_to_node(int cpu)
 170{
 171        return 0;
 172}
 173
 174static inline void setup_node_to_cpumask_map(void) { }
 175
 176#endif
 177
 178#include <asm-generic/topology.h>
 179
 180extern const struct cpumask *cpu_coregroup_mask(int cpu);
 181
 182#ifdef ENABLE_TOPO_DEFINES
 183#define topology_physical_package_id(cpu)       (cpu_data(cpu).phys_proc_id)
 184#define topology_core_id(cpu)                   (cpu_data(cpu).cpu_core_id)
 185#define topology_core_cpumask(cpu)              (per_cpu(cpu_core_map, cpu))
 186#define topology_thread_cpumask(cpu)            (per_cpu(cpu_sibling_map, cpu))
 187
 188/* indicates that pointers to the topology cpumask_t maps are valid */
 189#define arch_provides_topology_pointers         yes
 190#endif
 191
 192static inline void arch_fix_phys_package_id(int num, u32 slot)
 193{
 194}
 195
 196struct pci_bus;
 197void x86_pci_root_bus_res_quirks(struct pci_bus *b);
 198
 199#ifdef CONFIG_SMP
 200#define mc_capable()    ((boot_cpu_data.x86_max_cores > 1) && \
 201                        (cpumask_weight(cpu_core_mask(0)) != nr_cpu_ids))
 202#define smt_capable()                   (smp_num_siblings > 1)
 203#endif
 204
 205#ifdef CONFIG_NUMA
 206extern int get_mp_bus_to_node(int busnum);
 207extern void set_mp_bus_to_node(int busnum, int node);
 208#else
 209static inline int get_mp_bus_to_node(int busnum)
 210{
 211        return 0;
 212}
 213static inline void set_mp_bus_to_node(int busnum, int node)
 214{
 215}
 216#endif
 217
 218#endif /* _ASM_X86_TOPOLOGY_H */
 219