include/asm-powerpc/sparsemem.h

   1 #ifndef _ASM_POWERPC_SPARSEMEM_H
   2 #define _ASM_POWERPC_SPARSEMEM_H 1
   3
   4 #ifdef CONFIG_SPARSEMEM
   5 /*
   6  * SECTION_SIZE_BITS            2^N: how big each section will be
   7  * MAX_PHYSADDR_BITS            2^N: how much physical address space we have
   8  * MAX_PHYSMEM_BITS             2^N: how much memory we can have in that space
   9  */
  10 #define SECTION_SIZE_BITS       24
  11 #define MAX_PHYSADDR_BITS       38
  12 #define MAX_PHYSMEM_BITS        36
  13
  14 #ifdef CONFIG_MEMORY_HOTPLUG
  15 extern void create_section_mapping(unsigned long start, unsigned long end);
  16 #endif /* CONFIG_MEMORY_HOTPLUG */
  17
  18 #endif /* CONFIG_SPARSEMEM */
  19
  20 #endif /* _ASM_POWERPC_SPARSEMEM_H */