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       44
  14 #define MAX_PHYSMEM_BITS        44
  15
  16 #endif /* CONFIG_SPARSEMEM */
  17
  18 #ifdef CONFIG_MEMORY_HOTPLUG
  19 extern void create_section_mapping(unsigned long start, unsigned long end);
  20 extern int remove_section_mapping(unsigned long start, unsigned long end);
  21 #ifdef CONFIG_NUMA
  22 extern int hot_add_scn_to_nid(unsigned long scn_addr);
  23 #else
  24 static inline int hot_add_scn_to_nid(unsigned long scn_addr)
  25 {
  26         return 0;
  27 }
  28 #endif /* CONFIG_NUMA */
  29 #endif /* CONFIG_MEMORY_HOTPLUG */
  30
  31 #endif /* __KERNEL__ */
  32 #endif /* _ASM_POWERPC_SPARSEMEM_H */