include/asm-x86_64/topology.h

   1 #ifndef _ASM_X86_64_TOPOLOGY_H
   2 #define _ASM_X86_64_TOPOLOGY_H
   3
   4 #include <linux/config.h>
   5
   6 #ifdef CONFIG_NUMA
   7
   8 #include <asm/mpspec.h>
   9 #include <asm/bitops.h>
  10
  11 /* Map the K8 CPU local memory controllers to a simple 1:1 CPU:NODE topology */
  12
  13 extern cpumask_t cpu_online_map;
  14
  15 extern unsigned char cpu_to_node[];
  16 extern cpumask_t     node_to_cpumask[];
  17
  18 #ifdef CONFIG_ACPI_NUMA
  19 extern int __node_distance(int, int);
  20 #define node_distance(a,b) __node_distance(a,b)
  21 /* #else fallback version */
  22 #endif
  23
  24 #define cpu_to_node(cpu)                (cpu_to_node[cpu])
  25 #define parent_node(node)               (node)
  26 #define node_to_first_cpu(node)         (first_cpu(node_to_cpumask[node]))
  27 #define node_to_cpumask(node)           (node_to_cpumask[node])
  28 #define pcibus_to_node(bus)             ((long)(bus->sysdata))
  29 #define pcibus_to_cpumask(bus)          node_to_cpumask(pcibus_to_node(bus));
  30
  31 #define numa_node_id()                  read_pda(nodenumber)
  32
  33 /* sched_domains SD_NODE_INIT for x86_64 machines */
  34 #define SD_NODE_INIT (struct sched_domain) {            \
  35         .span                   = CPU_MASK_NONE,        \
  36         .parent                 = NULL,                 \
  37         .groups                 = NULL,                 \
  38         .min_interval           = 8,                    \
  39         .max_interval           = 32,                   \
  40         .busy_factor            = 32,                   \
  41         .imbalance_pct          = 125,                  \
  42         .cache_nice_tries       = 2,                    \
  43         .busy_idx               = 3,                    \
  44         .idle_idx               = 2,                    \
  45         .newidle_idx            = 0,                    \
  46         .wake_idx               = 1,                    \
  47         .forkexec_idx           = 1,                    \
  48         .per_cpu_gain           = 100,                  \
  49         .flags                  = SD_LOAD_BALANCE       \
  50                                 | SD_BALANCE_FORK       \
  51                                 | SD_BALANCE_EXEC       \
  52                                 | SD_WAKE_BALANCE,      \
  53         .last_balance           = jiffies,              \
  54         .balance_interval       = 1,                    \
  55         .nr_balance_failed      = 0,                    \
  56 }
  57
  58 #endif
  59
  60 #include <asm-generic/topology.h>
  61
  62 #endif