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 20 extern int create_section_mapping(unsigned long start, unsigned long end, int nid); 21 extern int remove_section_mapping(unsigned long start, unsigned long end); 22 23 #ifdef CONFIG_PPC_BOOK3S_64 24 extern void resize_hpt_for_hotplug(unsigned long new_mem_size); 25 #else 26 static inline void resize_hpt_for_hotplug(unsigned long new_mem_size) { } 27 #endif 28 29 #ifdef CONFIG_NUMA 30 extern int hot_add_scn_to_nid(unsigned long scn_addr); 31 #else 32 static 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 */ 41