include/asm-arm/page.h

   1 #ifndef _ASMARM_PAGE_H
   2 #define _ASMARM_PAGE_H
   3
   4 #include <asm/proc/page.h>
   5
   6 #define PAGE_SIZE       (1UL << PAGE_SHIFT)
   7 #define PAGE_MASK       (~(PAGE_SIZE-1))
   8
   9 #ifdef __KERNEL__
  10 #ifndef __ASSEMBLY__
  11
  12 #define STRICT_MM_TYPECHECKS
  13
  14 #define clear_page(page)        memzero((void *)(page), PAGE_SIZE)
  15 extern void copy_page(void *to, void *from);
  16
  17 #define clear_user_page(page, vaddr)    clear_page(page)
  18 #define copy_user_page(to, from, vaddr) copy_page(to, from)
  19
  20 #ifdef STRICT_MM_TYPECHECKS
  21 /*
  22  * These are used to make use of C type-checking..
  23  */
  24 typedef struct { unsigned long pte; } pte_t;
  25 typedef struct { unsigned long pmd; } pmd_t;
  26 typedef struct { unsigned long pgd; } pgd_t;
  27 typedef struct { unsigned long pgprot; } pgprot_t;
  28
  29 #define pte_val(x)      ((x).pte)
  30 #define pmd_val(x)      ((x).pmd)
  31 #define pgd_val(x)      ((x).pgd)
  32 #define pgprot_val(x)   ((x).pgprot)
  33
  34 #define __pte(x)        ((pte_t) { (x) } )
  35 #define __pmd(x)        ((pmd_t) { (x) } )
  36 #define __pgd(x)        ((pgd_t) { (x) } )
  37 #define __pgprot(x)     ((pgprot_t) { (x) } )
  38
  39 #else
  40 /*
  41  * .. while these make it easier on the compiler
  42  */
  43 typedef unsigned long pte_t;
  44 typedef unsigned long pmd_t;
  45 typedef unsigned long pgd_t;
  46 typedef unsigned long pgprot_t;
  47
  48 #define pte_val(x)      (x)
  49 #define pmd_val(x)      (x)
  50 #define pgd_val(x)      (x)
  51 #define pgprot_val(x)   (x)
  52
  53 #define __pte(x)        (x)
  54 #define __pmd(x)        (x)
  55 #define __pgd(x)        (x)
  56 #define __pgprot(x)     (x)
  57
  58 #endif
  59 #endif /* !__ASSEMBLY__ */
  60
  61 /* to align the pointer to the (next) page boundary */
  62 #define PAGE_ALIGN(addr)        (((addr)+PAGE_SIZE-1)&PAGE_MASK)
  63
  64 #ifndef __ASSEMBLY__
  65
  66 extern void __bug(const char *file, int line, void *data);
  67
  68 #define BUG()           __bug(__FILE__, __LINE__, NULL)
  69 #define PAGE_BUG(page)  __bug(__FILE__, __LINE__, page)
  70
  71 /* Pure 2^n version of get_order */
  72 extern __inline__ int get_order(unsigned long size)
  73 {
  74         int order;
  75
  76         size = (size-1) >> (PAGE_SHIFT-1);
  77         order = -1;
  78         do {
  79                 size >>= 1;
  80                 order++;
  81         } while (size);
  82         return order;
  83 }
  84
  85 #endif /* !__ASSEMBLY__ */
  86
  87 #include <linux/config.h>
  88 #include <asm/arch/memory.h>
  89
  90 #define __pa(x)                 __virt_to_phys((unsigned long)(x))
  91 #define __va(x)                 ((void *)__phys_to_virt((unsigned long)(x)))
  92
  93 #ifndef CONFIG_DISCONTIGMEM
  94 #define virt_to_page(kaddr)     (mem_map + (__pa(kaddr) >> PAGE_SHIFT) - \
  95                                  (PHYS_OFFSET >> PAGE_SHIFT))
  96 #define VALID_PAGE(page)        ((page - mem_map) < max_mapnr)
  97 #endif
  98
  99 #endif
 100
 101 #endif