Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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 */