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   1 /*
   2  * linux/include/asm-ia64/topology.h
   3  *
   4  * Copyright (C) 2002, Erich Focht, NEC
   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 #ifndef _ASM_IA64_TOPOLOGY_H
  14 #define _ASM_IA64_TOPOLOGY_H
  15
  16 #include <asm/acpi.h>
  17 #include <asm/numa.h>
  18 #include <asm/smp.h>
  19
  20 #ifdef CONFIG_NUMA
  21
  22 /* Nodes w/o CPUs are preferred for memory allocations, see build_zonelists */
  23 #define PENALTY_FOR_NODE_WITH_CPUS 255
  24
  25 /*
  26  * Distance above which we begin to use zone reclaim
  27  */
  28 #define RECLAIM_DISTANCE 15
  29
  30 /*
  31  * Returns the number of the node containing CPU 'cpu'
  32  */
  33 #define cpu_to_node(cpu) (int)(cpu_to_node_map[cpu])
  34
  35 /*
  36  * Returns a bitmask of CPUs on Node 'node'.
  37  */
  38 #define node_to_cpumask(node) (node_to_cpu_mask[node])
  39
  40 /*
  41  * Returns the number of the node containing Node 'nid'.
  42  * Not implemented here. Multi-level hierarchies detected with
  43  * the help of node_distance().
  44  */
  45 #define parent_node(nid) (nid)
  46
  47 /*
  48  * Returns the number of the first CPU on Node 'node'.
  49  */
  50 #define node_to_first_cpu(node) (first_cpu(node_to_cpumask(node)))
  51
  52 /*
  53  * Determines the node for a given pci bus
  54  */
  55 #define pcibus_to_node(bus) PCI_CONTROLLER(bus)->node
  56
  57 void build_cpu_to_node_map(void);
  58
  59 #define SD_CPU_INIT (struct sched_domain) {             \
  60         .span                   = CPU_MASK_NONE,        \
  61         .parent                 = NULL,                 \
  62         .child                  = NULL,                 \
  63         .groups                 = NULL,                 \
  64         .min_interval           = 1,                    \
  65         .max_interval           = 4,                    \
  66         .busy_factor            = 64,                   \
  67         .imbalance_pct          = 125,                  \
  68         .per_cpu_gain           = 100,                  \
  69         .cache_nice_tries       = 2,                    \
  70         .busy_idx               = 2,                    \
  71         .idle_idx               = 1,                    \
  72         .newidle_idx            = 2,                    \
  73         .wake_idx               = 1,                    \
  74         .forkexec_idx           = 1,                    \
  75         .flags                  = SD_LOAD_BALANCE       \
  76                                 | SD_BALANCE_NEWIDLE    \
  77                                 | SD_BALANCE_EXEC       \
  78                                 | SD_WAKE_AFFINE,       \
  79         .last_balance           = jiffies,              \
  80         .balance_interval       = 1,                    \
  81         .nr_balance_failed      = 0,                    \
  82 }
  83
  84 /* sched_domains SD_NODE_INIT for IA64 NUMA machines */
  85 #define SD_NODE_INIT (struct sched_domain) {            \
  86         .span                   = CPU_MASK_NONE,        \
  87         .parent                 = NULL,                 \
  88         .child                  = NULL,                 \
  89         .groups                 = NULL,                 \
  90         .min_interval           = 8,                    \
  91         .max_interval           = 8*(min(num_online_cpus(), 32)), \
  92         .busy_factor            = 64,                   \
  93         .imbalance_pct          = 125,                  \
  94         .cache_nice_tries       = 2,                    \
  95         .busy_idx               = 3,                    \
  96         .idle_idx               = 2,                    \
  97         .newidle_idx            = 0, /* unused */       \
  98         .wake_idx               = 1,                    \
  99         .forkexec_idx           = 1,                    \
 100         .per_cpu_gain           = 100,                  \
 101         .flags                  = SD_LOAD_BALANCE       \
 102                                 | SD_BALANCE_EXEC       \
 103                                 | SD_BALANCE_FORK       \
 104                                 | SD_SERIALIZE          \
 105                                 | SD_WAKE_BALANCE,      \
 106         .last_balance           = jiffies,              \
 107         .balance_interval       = 64,                   \
 108         .nr_balance_failed      = 0,                    \
 109 }
 110
 111 #endif /* CONFIG_NUMA */
 112
 113 #ifdef CONFIG_SMP
 114 #define topology_physical_package_id(cpu)       (cpu_data(cpu)->socket_id)
 115 #define topology_core_id(cpu)                   (cpu_data(cpu)->core_id)
 116 #define topology_core_siblings(cpu)             (cpu_core_map[cpu])
 117 #define topology_thread_siblings(cpu)           (cpu_sibling_map[cpu])
 118 #define smt_capable()                           (smp_num_siblings > 1)
 119 #endif
 120
 121 #include <asm-generic/topology.h>
 122
 123 #endif /* _ASM_IA64_TOPOLOGY_H */