| /* 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 */ |