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/* 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) { } #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; } #endif /* CONFIG_NUMA */ #endif /* CONFIG_MEMORY_HOTPLUG */ #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_SPARSEMEM_H */