include/asm-arm/proc-armo/page.h

   1 /*
   2  * linux/include/asm-arm/proc-armo/page.h
   3  *
   4  * Copyright (C) 1995, 1996 Russell King
   5  */
   6
   7 #ifndef __ASM_PROC_PAGE_H
   8 #define __ASM_PROC_PAGE_H
   9
  10 #include <linux/config.h>
  11
  12 /* PAGE_SHIFT determines the page size.  This is configurable. */
  13 #if defined(CONFIG_PAGESIZE_8)
  14 #define PAGE_SHIFT      13              /* 8K */
  15 #elif defined(CONFIG_PAGESIZE_16)
  16 #define PAGE_SHIFT      14              /* 16K */
  17 #else           /* default */
  18 #define PAGE_SHIFT      15              /* 32K */
  19 #endif
  20 #define PAGE_SIZE       (1UL << PAGE_SHIFT)
  21 #define PAGE_MASK       (~(PAGE_SIZE-1))
  22
  23 #ifdef __KERNEL__
  24
  25 #define STRICT_MM_TYPECHECKS
  26
  27 #ifdef STRICT_MM_TYPECHECKS
  28 /*
  29  * These are used to make use of C type-checking..
  30  */
  31 typedef struct { unsigned long pte; } pte_t;
  32 typedef struct { unsigned long pmd; } pmd_t;
  33 typedef struct { unsigned long pgd; } pgd_t;
  34 typedef struct { unsigned long pgprot; } pgprot_t;
  35
  36 #define pte_val(x)      ((x).pte)
  37 #define pmd_val(x)      ((x).pmd)
  38 #define pgd_val(x)      ((x).pgd)
  39 #define pgprot_val(x)   ((x).pgprot)
  40
  41 #define __pte(x)        ((pte_t) { (x) } )
  42 #define __pmd(x)        ((pmd_t) { (x) } )
  43 #define __pgd(x)        ((pgd_t) { (x) } )
  44 #define __pgprot(x)     ((pgprot_t) { (x) } )
  45
  46 #else
  47 /*
  48  * .. while these make it easier on the compiler
  49  */
  50 typedef unsigned long pte_t;
  51 typedef unsigned long pmd_t;
  52 typedef unsigned long pgd_t;
  53 typedef unsigned long pgprot_t;
  54
  55 #define pte_val(x)      (x)
  56 #define pmd_val(x)      (x)
  57 #define pgd_val(x)      (x)
  58 #define pgprot_val(x)   (x)
  59
  60 #define __pte(x)        (x)
  61 #define __pmd(x)        (x)
  62 #define __pgd(x)        (x)
  63 #define __pgprot(x)     (x)
  64
  65 #endif
  66
  67 /* to align the pointer to the (next) page boundary */
  68 #define PAGE_ALIGN(addr)        (((addr)+PAGE_SIZE-1)&PAGE_MASK)
  69
  70 /* This handles the memory map.. */
  71 #define MAP_NR(addr)            (((unsigned long)(addr) - PAGE_OFFSET) >> PAGE_SHIFT)
  72
  73 #endif /* __KERNEL__ */
  74
  75 #endif /* __ASM_PROC_PAGE_H */
  76