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_PHYSMEM_BITS 2^N: how much memory we can have in that space 10 */ 11 #define SECTION_SIZE_BITS 24 12 13 #endif /* CONFIG_SPARSEMEM */ 14 15 #ifdef CONFIG_MEMORY_HOTPLUG 16 extern int create_section_mapping(unsigned long start, unsigned long end, int nid); 17 extern int remove_section_mapping(unsigned long start, unsigned long end); 18 19 #ifdef CONFIG_PPC_BOOK3S_64 20 extern void resize_hpt_for_hotplug(unsigned long new_mem_size); 21 #else 22 static inline void resize_hpt_for_hotplug(unsigned long new_mem_size) { } 23 #endif 24 25 #ifdef CONFIG_NUMA 26 extern int hot_add_scn_to_nid(unsigned long scn_addr); 27 #else 28 static inline int hot_add_scn_to_nid(unsigned long scn_addr) 29 { 30 return 0; 31 } 32 #endif /* CONFIG_NUMA */ 33 #endif /* CONFIG_MEMORY_HOTPLUG */ 34 35 #endif /* __KERNEL__ */ 36 #endif /* _ASM_POWERPC_SPARSEMEM_H */ 37