1 /* SPDX-License-Identifier: GPL-2.0 */
4 #include <linux/init.h>
5 #include <linux/types.h>
7 #ifdef CONFIG_NODES_SHIFT
8 #define NODES_SHIFT CONFIG_NODES_SHIFT
13 #define MAX_NUMNODES (1 << NODES_SHIFT)
15 #define NUMA_NO_NODE (-1)
16 #define NUMA_NO_MEMBLK (-1)
18 /* optionally keep NUMA memory info available post init */
19 #ifdef CONFIG_NUMA_KEEP_MEMINFO
20 #define __initdata_or_meminfo
22 #define __initdata_or_meminfo __initdata
26 #include <asm/sparsemem.h>
28 /* Generic implementation available */
29 int numa_nearest_node(int node, unsigned int state);
31 #ifndef memory_add_physaddr_to_nid
32 int memory_add_physaddr_to_nid(u64 start);
35 #ifndef phys_to_target_node
36 int phys_to_target_node(u64 start);
39 #ifndef numa_fill_memblks
40 static inline int __init numa_fill_memblks(u64 start, u64 end)
42 return NUMA_NO_MEMBLK;
46 #else /* !CONFIG_NUMA */
47 static inline int numa_nearest_node(int node, unsigned int state)
52 static inline int memory_add_physaddr_to_nid(u64 start)
56 static inline int phys_to_target_node(u64 start)
62 #define numa_map_to_online_node(node) numa_nearest_node(node, N_ONLINE)
64 #ifdef CONFIG_HAVE_ARCH_NODE_DEV_GROUP
65 extern const struct attribute_group arch_node_dev_group;
68 #endif /* _LINUX_NUMA_H */