root/include/asm-alpha/page.h

/* */

INCLUDED FROM

   1 #ifndef _ALPHA_PAGE_H
   2 #define _ALPHA_PAGE_H
   3 
   4 /* PAGE_SHIFT determines the page size */
   5 #define PAGE_SHIFT      13
   6 #define PAGE_SIZE       (1UL << PAGE_SHIFT)
   7 #define PAGE_MASK       (~(PAGE_SIZE-1))
   8 
   9 #ifdef __KERNEL__
  10 
  11 #define STRICT_MM_TYPECHECKS
  12 
  13 #ifdef STRICT_MM_TYPECHECKS
  14 /*
  15  * These are used to make use of C type-checking..
  16  */
  17 typedef struct { unsigned long pte; } pte_t;
  18 typedef struct { unsigned long pmd; } pmd_t;
  19 typedef struct { unsigned long pgd; } pgd_t;
  20 typedef struct { unsigned long pgprot; } pgprot_t;
  21 
  22 #define pte_val(x)      ((x).pte)
  23 #define pmd_val(x)      ((x).pmd)
  24 #define pgd_val(x)      ((x).pgd)
  25 #define pgprot_val(x)   ((x).pgprot)
  26 
  27 #define __pte(x)        ((pte_t) { (x) } )
  28 #define __pgd(x)        ((pgd_t) { (x) } )
  29 #define __pgprot(x)     ((pgprot_t) { (x) } )
  30 
  31 #else
  32 /*
  33  * .. while these make it easier on the compiler
  34  */
  35 typedef unsigned long pte_t;
  36 typedef unsigned long pmd_t;
  37 typedef unsigned long pgd_t;
  38 typedef unsigned long pgprot_t;
  39 
  40 #define pte_val(x)      (x)
  41 #define pmd_val(x)      (x)
  42 #define pgd_val(x)      (x)
  43 #define pgprot_val(x)   (x)
  44 
  45 #define __pte(x)        (x)
  46 #define __pgd(x)        (x)
  47 #define __pgprot(x)     (x)
  48 
  49 #endif
  50 
  51 /* to align the pointer to the (next) page boundary */
  52 #define PAGE_ALIGN(addr)                (((addr)+PAGE_SIZE-1)&PAGE_MASK)
  53 
  54 #define PAGE_OFFSET             0xFFFFFC0000000000
  55 #define MAP_NR(addr)            ((((unsigned long) (addr)) - PAGE_OFFSET) >> PAGE_SHIFT)
  56 
  57 #endif /* __KERNEL__ */
  58 
  59 #endif /* _ALPHA_PAGE_H */

/* */