1#ifndef _ASM_POWERPC_SPARSEMEM_H
 2#define _ASM_POWERPC_SPARSEMEM_H 1
 3#ifdef __KERNEL__
 4
 5#ifdef CONFIG_SPARSEMEM
 6/*
 7 * SECTION_SIZE_BITS		2^N: how big each section will be
 8 * MAX_PHYSADDR_BITS		2^N: how much physical address space we have
 9 * MAX_PHYSMEM_BITS		2^N: how much memory we can have in that space
10 */
11#define SECTION_SIZE_BITS       24
12
13#define MAX_PHYSADDR_BITS       46
14#define MAX_PHYSMEM_BITS        46
15
16#endif /* CONFIG_SPARSEMEM */
17
18#ifdef CONFIG_MEMORY_HOTPLUG
19extern int create_section_mapping(unsigned long start, unsigned long end);
20extern int remove_section_mapping(unsigned long start, unsigned long end);
 
 
 
 
 
 
 
21#ifdef CONFIG_NUMA
22extern int hot_add_scn_to_nid(unsigned long scn_addr);
23#else
24static inline int hot_add_scn_to_nid(unsigned long scn_addr)
25{
26	return 0;
27}
28#endif /* CONFIG_NUMA */
29#endif /* CONFIG_MEMORY_HOTPLUG */
30
31#endif /* __KERNEL__ */
32#endif /* _ASM_POWERPC_SPARSEMEM_H */

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _ASM_POWERPC_SPARSEMEM_H
 3#define _ASM_POWERPC_SPARSEMEM_H 1
 4#ifdef __KERNEL__
 5
 6#ifdef CONFIG_SPARSEMEM
 7/*
 8 * SECTION_SIZE_BITS		2^N: how big each section will be
 9 * MAX_PHYSADDR_BITS		2^N: how much physical address space we have
10 * MAX_PHYSMEM_BITS		2^N: how much memory we can have in that space
11 */
12#define SECTION_SIZE_BITS       24
13
14#define MAX_PHYSADDR_BITS       46
15#define MAX_PHYSMEM_BITS        46
16
17#endif /* CONFIG_SPARSEMEM */
18
19#ifdef CONFIG_MEMORY_HOTPLUG
20extern int create_section_mapping(unsigned long start, unsigned long end, int nid);
21extern int remove_section_mapping(unsigned long start, unsigned long end);
22
23#ifdef CONFIG_PPC_BOOK3S_64
24extern void resize_hpt_for_hotplug(unsigned long new_mem_size);
25#else
26static inline void resize_hpt_for_hotplug(unsigned long new_mem_size) { }
27#endif
28
29#ifdef CONFIG_NUMA
30extern int hot_add_scn_to_nid(unsigned long scn_addr);
31#else
32static inline int hot_add_scn_to_nid(unsigned long scn_addr)
33{
34	return 0;
35}
36#endif /* CONFIG_NUMA */
37#endif /* CONFIG_MEMORY_HOTPLUG */
38
39#endif /* __KERNEL__ */
40#endif /* _ASM_POWERPC_SPARSEMEM_H */