1 #ifndef _ASM_X86_64_TOPOLOGY_H
2 #define _ASM_X86_64_TOPOLOGY_H
4 #include <linux/config.h>
6 #ifdef CONFIG_DISCONTIGMEM
8 #include <asm/mpspec.h>
9 #include <asm/bitops.h>
11 /* Map the K8 CPU local memory controllers to a simple 1:1 CPU:NODE topology */
13 extern cpumask_t cpu_online_map;
15 extern unsigned char cpu_to_node[];
16 extern cpumask_t node_to_cpumask[];
17 extern cpumask_t pci_bus_to_cpumask[];
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 */
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])
30 static inline cpumask_t __pcibus_to_cpumask(int bus)
32 cpumask_t busmask = pci_bus_to_cpumask[bus];
33 cpumask_t online = cpu_online_map;
35 cpus_and(res, busmask, online);
38 /* broken generic file uses #ifndef later on this */
39 #define pcibus_to_cpumask(bus) __pcibus_to_cpumask(bus)
42 /* sched_domains SD_NODE_INIT for x86_64 machines */
43 #define SD_NODE_INIT (struct sched_domain) { \
44 .span = CPU_MASK_NONE, \
50 .imbalance_pct = 125, \
51 .cache_hot_time = (10*1000000), \
52 .cache_nice_tries = 1, \
53 .per_cpu_gain = 100, \
54 .flags = SD_LOAD_BALANCE \
55 | SD_BALANCE_NEWIDLE \
59 .last_balance = jiffies, \
60 .balance_interval = 1, \
61 .nr_balance_failed = 0, \
67 #include <asm-generic/topology.h>