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 */
69
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