arch/loongarch/include/asm/numa.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Author: Jianmin Lv <lvjianmin@loongson.cn>
   4  *         Huacai Chen <chenhuacai@loongson.cn>
   5  *
   6  * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
   7  */
   8
   9 #ifndef _ASM_LOONGARCH_NUMA_H
  10 #define _ASM_LOONGARCH_NUMA_H
  11
  12 #include <linux/nodemask.h>
  13
  14 #define NODE_ADDRSPACE_SHIFT 44
  15
  16 #define pa_to_nid(addr)         (((addr) & 0xf00000000000) >> NODE_ADDRSPACE_SHIFT)
  17 #define nid_to_addrbase(nid)    (_ULCAST_(nid) << NODE_ADDRSPACE_SHIFT)
  18
  19 #ifdef CONFIG_NUMA
  20
  21 extern int numa_off;
  22 extern s16 __cpuid_to_node[CONFIG_NR_CPUS];
  23 extern nodemask_t numa_nodes_parsed __initdata;
  24
  25 struct numa_memblk {
  26         u64                     start;
  27         u64                     end;
  28         int                     nid;
  29 };
  30
  31 #define NR_NODE_MEMBLKS         (MAX_NUMNODES*2)
  32 struct numa_meminfo {
  33         int                     nr_blks;
  34         struct numa_memblk      blk[NR_NODE_MEMBLKS];
  35 };
  36
  37 extern int __init numa_add_memblk(int nodeid, u64 start, u64 end);
  38
  39 extern void __init early_numa_add_cpu(int cpuid, s16 node);
  40 extern void numa_add_cpu(unsigned int cpu);
  41 extern void numa_remove_cpu(unsigned int cpu);
  42
  43 static inline void numa_clear_node(int cpu)
  44 {
  45 }
  46
  47 static inline void set_cpuid_to_node(int cpuid, s16 node)
  48 {
  49         __cpuid_to_node[cpuid] = node;
  50 }
  51
  52 extern int early_cpu_to_node(int cpu);
  53
  54 #else
  55
  56 static inline void early_numa_add_cpu(int cpuid, s16 node)      { }
  57 static inline void numa_add_cpu(unsigned int cpu)               { }
  58 static inline void numa_remove_cpu(unsigned int cpu)            { }
  59 static inline void set_cpuid_to_node(int cpuid, s16 node)       { }
  60
  61 static inline int early_cpu_to_node(int cpu)
  62 {
  63         return 0;
  64 }
  65
  66 #endif  /* CONFIG_NUMA */
  67
  68 #endif  /* _ASM_LOONGARCH_NUMA_H */