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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  * Returns the number of the node containing CPU 'cpu'
  27  */
  28 #define cpu_to_node(cpu) (int)(cpu_to_node_map[cpu])
  29
  30 /*
  31  * Returns a bitmask of CPUs on Node 'node'.
  32  */
  33 #define node_to_cpumask(node) (node_to_cpu_mask[node])
  34
  35 /*
  36  * Returns the number of the node containing Node 'nid'.
  37  * Not implemented here. Multi-level hierarchies detected with
  38  * the help of node_distance().
  39  */
  40 #define parent_node(nid) (nid)
  41
  42 /*
  43  * Returns the number of the first CPU on Node 'node'.
  44  */
  45 #define node_to_first_cpu(node) (first_cpu(node_to_cpumask(node)))
  46
  47 /*
  48  * Determines the node for a given pci bus
  49  */
  50 #define pcibus_to_node(bus) PCI_CONTROLLER(bus)->node
  51
  52 void build_cpu_to_node_map(void);
  53
  54 #define SD_CPU_INIT (struct sched_domain) {             \
  55         .span                   = CPU_MASK_NONE,        \
  56         .parent                 = NULL,                 \
  57         .groups                 = NULL,                 \
  58         .min_interval           = 1,                    \
  59         .max_interval           = 4,                    \
  60         .busy_factor            = 64,                   \
  61         .imbalance_pct          = 125,                  \
  62         .per_cpu_gain           = 100,                  \
  63         .cache_nice_tries       = 2,                    \
  64         .busy_idx               = 2,                    \
  65         .idle_idx               = 1,                    \
  66         .newidle_idx            = 2,                    \
  67         .wake_idx               = 1,                    \
  68         .forkexec_idx           = 1,                    \
  69         .flags                  = SD_LOAD_BALANCE       \
  70                                 | SD_BALANCE_NEWIDLE    \
  71                                 | SD_BALANCE_EXEC       \
  72                                 | SD_WAKE_AFFINE,       \
  73         .last_balance           = jiffies,              \
  74         .balance_interval       = 1,                    \
  75         .nr_balance_failed      = 0,                    \
  76 }
  77
  78 /* sched_domains SD_NODE_INIT for IA64 NUMA machines */
  79 #define SD_NODE_INIT (struct sched_domain) {            \
  80         .span                   = CPU_MASK_NONE,        \
  81         .parent                 = NULL,                 \
  82         .groups                 = NULL,                 \
  83         .min_interval           = 8,                    \
  84         .max_interval           = 8*(min(num_online_cpus(), 32)), \
  85         .busy_factor            = 64,                   \
  86         .imbalance_pct          = 125,                  \
  87         .cache_nice_tries       = 2,                    \
  88         .busy_idx               = 3,                    \
  89         .idle_idx               = 2,                    \
  90         .newidle_idx            = 0, /* unused */       \
  91         .wake_idx               = 1,                    \
  92         .forkexec_idx           = 1,                    \
  93         .per_cpu_gain           = 100,                  \
  94         .flags                  = SD_LOAD_BALANCE       \
  95                                 | SD_BALANCE_EXEC       \
  96                                 | SD_BALANCE_FORK       \
  97                                 | SD_WAKE_BALANCE,      \
  98         .last_balance           = jiffies,              \
  99         .balance_interval       = 64,                   \
 100         .nr_balance_failed      = 0,                    \
 101 }
 102
 103 #endif /* CONFIG_NUMA */
 104
 105 #ifdef CONFIG_SMP
 106 #define topology_physical_package_id(cpu)       (cpu_data(cpu)->socket_id)
 107 #define topology_core_id(cpu)                   (cpu_data(cpu)->core_id)
 108 #define topology_core_siblings(cpu)             (cpu_core_map[cpu])
 109 #define topology_thread_siblings(cpu)           (cpu_sibling_map[cpu])
 110 #endif
 111
 112 #include <asm-generic/topology.h>
 113
 114 #endif /* _ASM_IA64_TOPOLOGY_H */