arch/powerpc/include/asm/sparsemem.h

   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       46
  14 #define MAX_PHYSMEM_BITS        46
  15
  16 #endif /* CONFIG_SPARSEMEM */
  17
  18 #ifdef CONFIG_MEMORY_HOTPLUG
  19 extern int create_section_mapping(unsigned long start, unsigned long end);
  20 extern int remove_section_mapping(unsigned long start, unsigned long end);
  21
  22 #ifdef CONFIG_PPC_BOOK3S_64
  23 extern void resize_hpt_for_hotplug(unsigned long new_mem_size);
  24 #else
  25 static inline void resize_hpt_for_hotplug(unsigned long new_mem_size) { }
  26 #endif
  27
  28 #ifdef CONFIG_NUMA
  29 extern int hot_add_scn_to_nid(unsigned long scn_addr);
  30 #else
  31 static inline int hot_add_scn_to_nid(unsigned long scn_addr)
  32 {
  33         return 0;
  34 }
  35 #endif /* CONFIG_NUMA */
  36 #endif /* CONFIG_MEMORY_HOTPLUG */
  37
  38 #endif /* __KERNEL__ */
  39 #endif /* _ASM_POWERPC_SPARSEMEM_H */