1 #ifndef _ASM_X86_NUMA_H
2 #define _ASM_X86_NUMA_H
3
4 #include <linux/nodemask.h>
5
6 #include <asm/topology.h>
7 #include <asm/apicdef.h>
8
9 #ifdef CONFIG_NUMA
10
11 #define NR_NODE_MEMBLKS (MAX_NUMNODES*2)
12
13 /*
14 * Too small node sizes may confuse the VM badly. Usually they
15 * result from BIOS bugs. So dont recognize nodes as standalone
16 * NUMA entities that have less than this amount of RAM listed:
17 */
18 #define NODE_MIN_SIZE (4*1024*1024)
19
20 extern int numa_off;
21
22 /*
23 * __apicid_to_node[] stores the raw mapping between physical apicid and
24 * node and is used to initialize cpu_to_node mapping.
25 *
26 * The mapping may be overridden by apic->numa_cpu_node() on 32bit and thus
27 * should be accessed by the accessors - set_apicid_to_node() and
28 * numa_cpu_node().
29 */
30 extern s16 __apicid_to_node[MAX_LOCAL_APIC];
31 extern nodemask_t numa_nodes_parsed __initdata;
32
33 extern int __init numa_add_memblk(int nodeid, u64 start, u64 end);
34 extern void __init numa_set_distance(int from, int to, int distance);
35
set_apicid_to_node(int apicid,s16 node)36 static inline void set_apicid_to_node(int apicid, s16 node)
37 {
38 __apicid_to_node[apicid] = node;
39 }
40
41 extern int numa_cpu_node(int cpu);
42
43 #else /* CONFIG_NUMA */
set_apicid_to_node(int apicid,s16 node)44 static inline void set_apicid_to_node(int apicid, s16 node)
45 {
46 }
47
numa_cpu_node(int cpu)48 static inline int numa_cpu_node(int cpu)
49 {
50 return NUMA_NO_NODE;
51 }
52 #endif /* CONFIG_NUMA */
53
54 #ifdef CONFIG_X86_32
55 # include <asm/numa_32.h>
56 #endif
57
58 #ifdef CONFIG_NUMA
59 extern void numa_set_node(int cpu, int node);
60 extern void numa_clear_node(int cpu);
61 extern void __init init_cpu_to_node(void);
62 extern void numa_add_cpu(int cpu);
63 extern void numa_remove_cpu(int cpu);
64 #else /* CONFIG_NUMA */
numa_set_node(int cpu,int node)65 static inline void numa_set_node(int cpu, int node) { }
numa_clear_node(int cpu)66 static inline void numa_clear_node(int cpu) { }
init_cpu_to_node(void)67 static inline void init_cpu_to_node(void) { }
numa_add_cpu(int cpu)68 static inline void numa_add_cpu(int cpu) { }
numa_remove_cpu(int cpu)69 static inline void numa_remove_cpu(int cpu) { }
70 #endif /* CONFIG_NUMA */
71
72 #ifdef CONFIG_DEBUG_PER_CPU_MAPS
73 void debug_cpumask_set_cpu(int cpu, int node, bool enable);
74 #endif
75
76 #ifdef CONFIG_NUMA_EMU
77 #define FAKE_NODE_MIN_SIZE ((u64)32 << 20)
78 #define FAKE_NODE_MIN_HASH_MASK (~(FAKE_NODE_MIN_SIZE - 1UL))
79 void numa_emu_cmdline(char *);
80 #endif /* CONFIG_NUMA_EMU */
81
82 #endif /* _ASM_X86_NUMA_H */
83