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 remove_section_mapping(unsigned long start, unsigned long end);
  17 extern int memory_add_physaddr_to_nid(u64 start);
  18 #define memory_add_physaddr_to_nid memory_add_physaddr_to_nid
  19
  20 #ifdef CONFIG_NUMA
  21 extern int hot_add_scn_to_nid(unsigned long scn_addr);
  22 #else
  23 static inline int hot_add_scn_to_nid(unsigned long scn_addr)
  24 {
  25         return 0;
  26 }
  27 #endif /* CONFIG_NUMA */
  28 #endif /* CONFIG_MEMORY_HOTPLUG */
  29 #endif /* __KERNEL__ */
  30 #endif /* _ASM_POWERPC_SPARSEMEM_H */