arch/powerpc/include/asm/sparsemem.h

   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 */