1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _LINUX_NUMA_H 3#define _LINUX_NUMA_H 4#include <linux/init.h> 5#include <linux/types.h> 6 7#ifdef CONFIG_NODES_SHIFT 8#define NODES_SHIFT CONFIG_NODES_SHIFT 9#else 10#define NODES_SHIFT 0 11#endif 12 13#define MAX_NUMNODES (1 << NODES_SHIFT) 14 15#define NUMA_NO_NODE (-1) 16#define NUMA_NO_MEMBLK (-1) 17 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 25#ifdef CONFIG_NUMA 26#include <asm/sparsemem.h> 27 28/* Generic implementation available */ 29int numa_nearest_node(int node, unsigned int state); 30 31#ifndef memory_add_physaddr_to_nid 32int memory_add_physaddr_to_nid(u64 start); 33#endif 34 35#ifndef phys_to_target_node 36int phys_to_target_node(u64 start); 37#endif 38 39#ifndef numa_fill_memblks 40static inline int __init numa_fill_memblks(u64 start, u64 end) 41{ 42 return NUMA_NO_MEMBLK; 43} 44#endif 45 46#else /* !CONFIG_NUMA */ 47static inline int numa_nearest_node(int node, unsigned int state) 48{ 49 return NUMA_NO_NODE; 50} 51 52static inline int memory_add_physaddr_to_nid(u64 start) 53{ 54 return 0; 55} 56static inline int phys_to_target_node(u64 start) 57{ 58 return 0; 59} 60#endif 61 62#define numa_map_to_online_node(node) numa_nearest_node(node, N_ONLINE) 63 64#ifdef CONFIG_HAVE_ARCH_NODE_DEV_GROUP 65extern const struct attribute_group arch_node_dev_group; 66#endif 67 68#endif /* _LINUX_NUMA_H */ 69