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 
numa_clear_node(int cpu)43 static inline void numa_clear_node(int cpu)
44 {
45 }
46 
set_cpuid_to_node(int cpuid,s16 node)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 
early_numa_add_cpu(int cpuid,s16 node)56 static inline void early_numa_add_cpu(int cpuid, s16 node)	{ }
numa_add_cpu(unsigned int cpu)57 static inline void numa_add_cpu(unsigned int cpu)		{ }
numa_remove_cpu(unsigned int cpu)58 static inline void numa_remove_cpu(unsigned int cpu)		{ }
59 
early_cpu_to_node(int cpu)60 static inline int early_cpu_to_node(int cpu)
61 {
62 	return 0;
63 }
64 
65 #endif	/* CONFIG_NUMA */
66 
67 #endif	/* _ASM_LOONGARCH_NUMA_H */
68