1#ifndef _ASM_POWERPC_SPARSEMEM_H 2#define _ASM_POWERPC_SPARSEMEM_H 1 3#ifdef __KERNEL__ 4 5#ifdef CONFIG_SPARSEMEM 6/* 7 * SECTION_SIZE_BITS 2^N: how big each section will be 8 * MAX_PHYSADDR_BITS 2^N: how much physical address space we have 9 * MAX_PHYSMEM_BITS 2^N: how much memory we can have in that space 10 */ 11#define SECTION_SIZE_BITS 24 12 13#define MAX_PHYSADDR_BITS 44 14#define MAX_PHYSMEM_BITS 44 15 16#endif /* CONFIG_SPARSEMEM */ 17 18#ifdef CONFIG_MEMORY_HOTPLUG 19extern void create_section_mapping(unsigned long start, unsigned long end); 20extern int remove_section_mapping(unsigned long start, unsigned long end); 21#ifdef CONFIG_NUMA 22extern int hot_add_scn_to_nid(unsigned long scn_addr); 23#else 24static inline int hot_add_scn_to_nid(unsigned long scn_addr) 25{ 26 return 0; 27} 28#endif /* CONFIG_NUMA */ 29#endif /* CONFIG_MEMORY_HOTPLUG */ 30 31#endif /* __KERNEL__ */ 32#endif /* _ASM_POWERPC_SPARSEMEM_H */ 33