include/asm-i386/sparsemem.h

   1 #ifndef _I386_SPARSEMEM_H
   2 #define _I386_SPARSEMEM_H
   3 #ifdef CONFIG_SPARSEMEM
   4
   5 /*
   6  * generic non-linear memory support:
   7  *
   8  * 1) we will not split memory into more chunks than will fit into the
   9  *    flags field of the struct page
  10  */
  11
  12 /*
  13  * SECTION_SIZE_BITS            2^N: how big each section will be
  14  * MAX_PHYSADDR_BITS            2^N: how much physical address space we have
  15  * MAX_PHYSMEM_BITS             2^N: how much memory we can have in that space
  16  */
  17 #ifdef CONFIG_X86_PAE
  18 #define SECTION_SIZE_BITS       30
  19 #define MAX_PHYSADDR_BITS       36
  20 #define MAX_PHYSMEM_BITS        36
  21 #else
  22 #define SECTION_SIZE_BITS       26
  23 #define MAX_PHYSADDR_BITS       32
  24 #define MAX_PHYSMEM_BITS        32
  25 #endif
  26
  27 /* XXX: FIXME -- wli */
  28 #define kern_addr_valid(kaddr)  (0)
  29
  30 #endif /* CONFIG_SPARSEMEM */
  31 #endif /* _I386_SPARSEMEM_H */