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- /* SPDX-License-Identifier: GPL-2.0 */
- #ifndef _LINUX_NUMA_H
- #define _LINUX_NUMA_H
- #include <linux/types.h>
- #ifdef CONFIG_NODES_SHIFT
- #define NODES_SHIFT CONFIG_NODES_SHIFT
- #else
- #define NODES_SHIFT 0
- #endif
- #define MAX_NUMNODES (1 << NODES_SHIFT)
- #define NUMA_NO_NODE (-1)
- #define NUMA_NO_MEMBLK (-1)
- /* optionally keep NUMA memory info available post init */
- #ifdef CONFIG_NUMA_KEEP_MEMINFO
- #define __initdata_or_meminfo
- #else
- #define __initdata_or_meminfo __initdata
- #endif
- #ifdef CONFIG_NUMA
- #include <linux/printk.h>
- #include <asm/sparsemem.h>
- /* Generic implementation available */
- int numa_map_to_online_node(int node);
- #ifndef memory_add_physaddr_to_nid
- static inline int memory_add_physaddr_to_nid(u64 start)
- {
- pr_info_once("Unknown online node for memory at 0x%llx, assuming node 0\n",
- start);
- return 0;
- }
- #endif
- #ifndef phys_to_target_node
- static inline int phys_to_target_node(u64 start)
- {
- pr_info_once("Unknown target node for memory at 0x%llx, assuming node 0\n",
- start);
- return 0;
- }
- #endif
- #ifndef numa_fill_memblks
- static inline int __init numa_fill_memblks(u64 start, u64 end)
- {
- return NUMA_NO_MEMBLK;
- }
- #endif
- #else /* !CONFIG_NUMA */
- static inline int numa_map_to_online_node(int node)
- {
- return NUMA_NO_NODE;
- }
- static inline int memory_add_physaddr_to_nid(u64 start)
- {
- return 0;
- }
- static inline int phys_to_target_node(u64 start)
- {
- return 0;
- }
- #endif
- #ifdef CONFIG_HAVE_ARCH_NODE_DEV_GROUP
- extern const struct attribute_group arch_node_dev_group;
- #endif
- #endif /* _LINUX_NUMA_H */
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