Commit | Line | Data |
---|---|---|
b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef _LINUX_NUMA_H |
3 | #define _LINUX_NUMA_H | |
d7a73e3f | 4 | #include <linux/init.h> |
5d30f92e | 5 | #include <linux/types.h> |
1da177e4 | 6 | |
c80d79d7 YG |
7 | #ifdef CONFIG_NODES_SHIFT |
8 | #define NODES_SHIFT CONFIG_NODES_SHIFT | |
9 | #else | |
1da177e4 LT |
10 | #define NODES_SHIFT 0 |
11 | #endif | |
12 | ||
13 | #define MAX_NUMNODES (1 << NODES_SHIFT) | |
14 | ||
4e25b257 | 15 | #define NUMA_NO_NODE (-1) |
8f012db2 | 16 | #define NUMA_NO_MEMBLK (-1) |
4e25b257 | 17 | |
1e5d8e1e DW |
18 | /* optionally keep NUMA memory info available post init */ |
19 | #ifdef CONFIG_NUMA_KEEP_MEMINFO | |
20 | #define __initdata_or_meminfo | |
21 | #else | |
22 | #define __initdata_or_meminfo __initdata | |
23 | #endif | |
24 | ||
b2ca916c | 25 | #ifdef CONFIG_NUMA |
a927bd6b DW |
26 | #include <asm/sparsemem.h> |
27 | ||
5d30f92e | 28 | /* Generic implementation available */ |
b1f099b1 | 29 | int numa_nearest_node(int node, unsigned int state); |
a927bd6b DW |
30 | |
31 | #ifndef memory_add_physaddr_to_nid | |
d7a73e3f | 32 | int memory_add_physaddr_to_nid(u64 start); |
a927bd6b | 33 | #endif |
d7a73e3f | 34 | |
a927bd6b | 35 | #ifndef phys_to_target_node |
d7a73e3f | 36 | int phys_to_target_node(u64 start); |
a927bd6b | 37 | #endif |
d7a73e3f | 38 | |
8f012db2 AS |
39 | #ifndef numa_fill_memblks |
40 | static inline int __init numa_fill_memblks(u64 start, u64 end) | |
41 | { | |
42 | return NUMA_NO_MEMBLK; | |
43 | } | |
44 | #endif | |
d7a73e3f | 45 | |
a927bd6b | 46 | #else /* !CONFIG_NUMA */ |
b1f099b1 | 47 | static inline int numa_nearest_node(int node, unsigned int state) |
b2ca916c DW |
48 | { |
49 | return NUMA_NO_NODE; | |
50 | } | |
b1f099b1 | 51 | |
a927bd6b DW |
52 | static inline int memory_add_physaddr_to_nid(u64 start) |
53 | { | |
54 | return 0; | |
55 | } | |
56 | static inline int phys_to_target_node(u64 start) | |
57 | { | |
58 | return 0; | |
59 | } | |
b2ca916c DW |
60 | #endif |
61 | ||
b1f099b1 YN |
62 | #define numa_map_to_online_node(node) numa_nearest_node(node, N_ONLINE) |
63 | ||
50468e43 JS |
64 | #ifdef CONFIG_HAVE_ARCH_NODE_DEV_GROUP |
65 | extern const struct attribute_group arch_node_dev_group; | |
66 | #endif | |
67 | ||
1da177e4 | 68 | #endif /* _LINUX_NUMA_H */ |