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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  * Returns the number of the node containing CPU 'cpu'
  23  */
  24 #define cpu_to_node(cpu) (int)(cpu_to_node_map[cpu])
  25
  26 /*
  27  * Returns a bitmask of CPUs on Node 'node'.
  28  */
  29 #define node_to_cpumask(node) (node_to_cpu_mask[node])
  30
  31 /*
  32  * Returns the number of the node containing Node 'nid'.
  33  * Not implemented here. Multi-level hierarchies detected with
  34  * the help of node_distance().
  35  */
  36 #define parent_node(nid) (nid)
  37
  38 /*
  39  * Returns the number of the first CPU on Node 'node'.
  40  */
  41 #define node_to_first_cpu(node) (__ffs(node_to_cpumask(node)))
  42
  43 /*
  44  * Determines the node for a given pci bus
  45  */
  46 #define pcibus_to_node(bus) PCI_CONTROLLER(bus)->node
  47
  48 void build_cpu_to_node_map(void);
  49
  50 #define SD_CPU_INIT (struct sched_domain) {             \
  51         .span                   = CPU_MASK_NONE,        \
  52         .parent                 = NULL,                 \
  53         .groups                 = NULL,                 \
  54         .min_interval           = 1,                    \
  55         .max_interval           = 4,                    \
  56         .busy_factor            = 64,                   \
  57         .imbalance_pct          = 125,                  \
  58         .cache_hot_time         = (10*1000000),         \
  59         .per_cpu_gain           = 100,                  \
  60         .cache_nice_tries       = 2,                    \
  61         .busy_idx               = 2,                    \
  62         .idle_idx               = 1,                    \
  63         .newidle_idx            = 2,                    \
  64         .wake_idx               = 1,                    \
  65         .forkexec_idx           = 1,                    \
  66         .flags                  = SD_LOAD_BALANCE       \
  67                                 | SD_BALANCE_NEWIDLE    \
  68                                 | SD_BALANCE_EXEC       \
  69                                 | SD_WAKE_AFFINE,       \
  70         .last_balance           = jiffies,              \
  71         .balance_interval       = 1,                    \
  72         .nr_balance_failed      = 0,                    \
  73 }
  74
  75 /* sched_domains SD_NODE_INIT for IA64 NUMA machines */
  76 #define SD_NODE_INIT (struct sched_domain) {            \
  77         .span                   = CPU_MASK_NONE,        \
  78         .parent                 = NULL,                 \
  79         .groups                 = NULL,                 \
  80         .min_interval           = 8,                    \
  81         .max_interval           = 8*(min(num_online_cpus(), 32)), \
  82         .busy_factor            = 64,                   \
  83         .imbalance_pct          = 125,                  \
  84         .cache_hot_time         = (10*1000000),         \
  85         .cache_nice_tries       = 2,                    \
  86         .busy_idx               = 3,                    \
  87         .idle_idx               = 2,                    \
  88         .newidle_idx            = 0, /* unused */       \
  89         .wake_idx               = 1,                    \
  90         .forkexec_idx           = 1,                    \
  91         .per_cpu_gain           = 100,                  \
  92         .flags                  = SD_LOAD_BALANCE       \
  93                                 | SD_BALANCE_EXEC       \
  94                                 | SD_BALANCE_FORK       \
  95                                 | SD_WAKE_BALANCE,      \
  96         .last_balance           = jiffies,              \
  97         .balance_interval       = 64,                   \
  98         .nr_balance_failed      = 0,                    \
  99 }
 100
 101 #endif /* CONFIG_NUMA */
 102
 103 #include <asm-generic/topology.h>
 104
 105 #endif /* _ASM_IA64_TOPOLOGY_H */