Release 4.14 arch/powerpc/include/asm/sparsemem.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_SPARSEMEM_H

#define _ASM_POWERPC_SPARSEMEM_H 1
#ifdef __KERNEL__

#ifdef CONFIG_SPARSEMEM
/*
 * SECTION_SIZE_BITS            2^N: how big each section will be
 * MAX_PHYSADDR_BITS            2^N: how much physical address space we have
 * MAX_PHYSMEM_BITS             2^N: how much memory we can have in that space
 */

#define SECTION_SIZE_BITS       24


#define MAX_PHYSADDR_BITS       46

#define MAX_PHYSMEM_BITS        46

#endif /* CONFIG_SPARSEMEM */

#ifdef CONFIG_MEMORY_HOTPLUG
extern int create_section_mapping(unsigned long start, unsigned long end);
extern int remove_section_mapping(unsigned long start, unsigned long end);

#ifdef CONFIG_PPC_BOOK3S_64
extern void resize_hpt_for_hotplug(unsigned long new_mem_size);
#else


static inline void resize_hpt_for_hotplug(unsigned long new_mem_size) { }
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#endif

#ifdef CONFIG_NUMA
extern int hot_add_scn_to_nid(unsigned long scn_addr);
#else


static inline int hot_add_scn_to_nid(unsigned long scn_addr)
{
	return 0;
}
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#endif /* CONFIG_NUMA */
#endif /* CONFIG_MEMORY_HOTPLUG */

#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_SPARSEMEM_H */
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Directory: arch/powerpc/include/asm

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