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, 17 int nid, pgprot_t prot); 18 extern int remove_section_mapping(unsigned long start, unsigned long end); 19 20 #ifdef CONFIG_PPC_BOOK3S_64 21 extern int resize_hpt_for_hotplug(unsigned long new_mem_size); 22 #else 23 static inline int resize_hpt_for_hotplug(unsigned long new_mem_size) { return 0; } 24 #endif 25 26 #ifdef CONFIG_NUMA 27 extern int hot_add_scn_to_nid(unsigned long scn_addr); 28 #else 29 static inline int hot_add_scn_to_nid(unsigned long scn_addr) 30 { 31 return 0; 32 } 33 #endif /* CONFIG_NUMA */ 34 #endif /* CONFIG_MEMORY_HOTPLUG */ 35 36 #endif /* __KERNEL__ */ 37 #endif /* _ASM_POWERPC_SPARSEMEM_H */ 38