]> nv-tegra.nvidia Code Review - linux-2.6.git/blob - include/asm-x86_64/topology.h
[PATCH] reorganize x86-64 NUMA and DISCONTIGMEM config options
[linux-2.6.git] / 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 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 /* sched_domains SD_NODE_INIT for x86_64 machines */
41 #define SD_NODE_INIT (struct sched_domain) {            \
42         .span                   = CPU_MASK_NONE,        \
43         .parent                 = NULL,                 \
44         .groups                 = NULL,                 \
45         .min_interval           = 8,                    \
46         .max_interval           = 32,                   \
47         .busy_factor            = 32,                   \
48         .imbalance_pct          = 125,                  \
49         .cache_hot_time         = (10*1000000),         \
50         .cache_nice_tries       = 1,                    \
51         .per_cpu_gain           = 100,                  \
52         .flags                  = SD_LOAD_BALANCE       \
53                                 | SD_BALANCE_NEWIDLE    \
54                                 | SD_BALANCE_EXEC       \
55                                 | SD_WAKE_IDLE          \
56                                 | SD_WAKE_BALANCE,      \
57         .last_balance           = jiffies,              \
58         .balance_interval       = 1,                    \
59         .nr_balance_failed      = 0,                    \
60 }
61
62 #endif
63
64 #include <asm-generic/topology.h>
65
66 #endif