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/arch/x86/include/asm/sparsemem.h

https://bitbucket.org/cresqo/cm7-p500-kernel
C Header | 34 lines | 20 code | 3 blank | 11 comment | 0 complexity | 8c75282f5410a18a2b99236fac429dc2 MD5 | raw file
Possible License(s): LGPL-2.0, AGPL-1.0, GPL-2.0 
    

  1. #ifndef _ASM_X86_SPARSEMEM_H
    2. 

  2. #define _ASM_X86_SPARSEMEM_H
    3. 

  3. 

  4. #ifdef CONFIG_SPARSEMEM
    5. 

  5. /*
    6. 

  6.  * generic non-linear memory support:
    7. 

  7.  *
    8. 

  8.  * 1) we will not split memory into more chunks than will fit into the flags
    9. 

  9.  *    field of the struct page
    10. 

  10.  *
    11. 

  11.  * SECTION_SIZE_BITS		2^n: size of each section
    12. 

  12.  * MAX_PHYSADDR_BITS		2^n: max size of physical address space
    13. 

  13.  * MAX_PHYSMEM_BITS		2^n: how much memory we can have in that space
    14. 

  14.  *
    15. 

  15.  */
    16. 

  16. 

  17. #ifdef CONFIG_X86_32
    18. 

  18. # ifdef CONFIG_X86_PAE
    19. 

  19. #  define SECTION_SIZE_BITS	29
    20. 

  20. #  define MAX_PHYSADDR_BITS	36
    21. 

  21. #  define MAX_PHYSMEM_BITS	36
    22. 

  22. # else
    23. 

  23. #  define SECTION_SIZE_BITS	26
    24. 

  24. #  define MAX_PHYSADDR_BITS	32
    25. 

  25. #  define MAX_PHYSMEM_BITS	32
    26. 

  26. # endif
    27. 

  27. #else /* CONFIG_X86_32 */
    28. 

  28. # define SECTION_SIZE_BITS	27 /* matt - 128 is convenient right now */
    29. 

  29. # define MAX_PHYSADDR_BITS	44
    30. 

  30. # define MAX_PHYSMEM_BITS	46
    31. 

  31. #endif
    32. 

  32. 

  33. #endif /* CONFIG_SPARSEMEM */
    34. 

  34. #endif /* _ASM_X86_SPARSEMEM_H */
    35. 

  35.