| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 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 int resize_hpt_for_hotplug(unsigned long new_mem_size); |
| 21 | #else |
| 22 | static inline int resize_hpt_for_hotplug(unsigned long new_mem_size) { return 0; } |
| 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 */ |