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_DISCONTIGMEM
   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 extern cpumask_t pci_bus_to_cpumask[];
  18
  19 #ifdef CONFIG_ACPI_NUMA
  20 extern int __node_distance(int, int);
  21 #define node_distance(a,b) __node_distance(a,b)
  22 /* #else fallback version */
  23 #endif
  24
  25 #define cpu_to_node(cpu)                (cpu_to_node[cpu])
  26 #define parent_node(node)               (node)
  27 #define node_to_first_cpu(node)         (__ffs(node_to_cpumask[node]))
  28 #define node_to_cpumask(node)           (node_to_cpumask[node])
  29
  30 static inline cpumask_t __pcibus_to_cpumask(int bus)
  31 {
  32         cpumask_t busmask = pci_bus_to_cpumask[bus];
  33         cpumask_t online = cpu_online_map;
  34         cpumask_t res;
  35         cpus_and(res, busmask, online);
  36         return res;
  37 }
  38 #define pcibus_to_cpumask(bus) __pcibus_to_cpumask(bus->number)
  39
  40 #ifdef CONFIG_NUMA
  41 /* sched_domains SD_NODE_INIT for x86_64 machines */
  42 #define SD_NODE_INIT (struct sched_domain) {            \
  43         .span                   = CPU_MASK_NONE,        \
  44         .parent                 = NULL,                 \
  45         .groups                 = NULL,                 \
  46         .min_interval           = 8,                    \
  47         .max_interval           = 32,                   \
  48         .busy_factor            = 32,                   \
  49         .imbalance_pct          = 125,                  \
  50         .cache_hot_time         = (10*1000000),         \
  51         .cache_nice_tries       = 1,                    \
  52         .per_cpu_gain           = 100,                  \
  53         .flags                  = SD_LOAD_BALANCE       \
  54                                 | SD_BALANCE_NEWIDLE    \
  55                                 | SD_BALANCE_EXEC       \
  56                                 | SD_WAKE_IDLE          \
  57                                 | SD_WAKE_BALANCE,      \
  58         .last_balance           = jiffies,              \
  59         .balance_interval       = 1,                    \
  60         .nr_balance_failed      = 0,                    \
  61 }
  62 #endif
  63
  64 #endif
  65
  66 #include <asm-generic/topology.h>
  67
  68 #endif