include/asm-arm26/page.h

   1 #ifndef _ASMARM_PAGE_H
   2 #define _ASMARM_PAGE_H
   3
   4
   5 #ifdef __KERNEL__
   6 #ifndef __ASSEMBLY__
   7
   8 extern void __clear_user_page(void *p, unsigned long user);
   9 extern void __copy_user_page(void *to, const void *from, unsigned long user);
  10 extern void copy_page(void *to, const void *from);
  11
  12 //FIXME these may be wrong on ARM26
  13 #define clear_user_page(addr,vaddr,pg)                  \
  14         do {                                            \
  15                 preempt_disable();                      \
  16                 __clear_user_page(addr, vaddr); \
  17                 preempt_enable();                       \
  18         } while (0)
  19
  20 #define copy_user_page(to,from,vaddr,pg)                \
  21         do {                                            \
  22                 preempt_disable();                      \
  23                 __copy_user_page(to, from, vaddr);      \
  24                 preempt_enable();                       \
  25         } while (0)
  26
  27 #define clear_page(page)        memzero((void *)(page), PAGE_SIZE)
  28 #define copy_page(to, from)  __copy_user_page(to, from, 0);
  29
  30 #undef STRICT_MM_TYPECHECKS
  31
  32 #ifdef STRICT_MM_TYPECHECKS
  33 /*
  34  * These are used to make use of C type-checking..
  35  */
  36 typedef struct { unsigned long pgd; } pgd_t;
  37 typedef struct { unsigned long pte; } pte_t;
  38 typedef struct { unsigned long pmd; } pmd_t;
  39 typedef struct { unsigned long pgprot; } pgprot_t;
  40
  41 #define pgd_val(x)      ((x).pgd)
  42 #define pte_val(x)      ((x).pte)
  43 #define pmd_val(x)      ((x).pmd)
  44 #define pgprot_val(x)   ((x).pgprot)
  45
  46 #define __pte(x)        ((pte_t) { (x) } )
  47 #define __pmd(x)        ((pmd_t) { (x) } )
  48 #define __pgprot(x)     ((pgprot_t) { (x) } )
  49
  50 #else
  51 /*
  52  * .. while these make it easier on the compiler
  53  */
  54 typedef unsigned long pgd_t;
  55 typedef unsigned long pte_t;
  56 typedef unsigned long pmd_t;
  57 typedef unsigned long pgprot_t;
  58
  59 //FIXME - should these cast to unsigned long?
  60 #define pgd_val(x)      (x)
  61 #define pte_val(x)      (x)
  62 #define pmd_val(x)      (x)
  63 #define pgprot_val(x)   (x)
  64
  65 #define __pte(x)        (x)
  66 #define __pmd(x)        (x)
  67 #define __pgprot(x)     (x)
  68
  69 #endif /* STRICT_MM_TYPECHECKS */
  70 #endif /* !__ASSEMBLY__ */
  71 #endif /* __KERNEL__ */
  72
  73 /* PAGE_SHIFT determines the page size.  This is configurable. */
  74 #if defined(CONFIG_PAGESIZE_16)
  75 #define PAGE_SHIFT      14              /* 16K */
  76 #else           /* default */
  77 #define PAGE_SHIFT      15              /* 32K */
  78 #endif
  79
  80 #define EXEC_PAGESIZE   32768
  81
  82 #define PAGE_SIZE               (1UL << PAGE_SHIFT)
  83 #define PAGE_MASK               (~(PAGE_SIZE-1))
  84
  85 /* to align the pointer to the (next) page boundary */
  86 #define PAGE_ALIGN(addr)        (((addr)+PAGE_SIZE-1)&PAGE_MASK)
  87
  88 #ifdef __KERNEL__
  89 #ifndef __ASSEMBLY__
  90
  91 #include <asm/memory.h>
  92
  93 #endif /* !__ASSEMBLY__ */
  94
  95 #define VM_DATA_DEFAULT_FLAGS   (VM_READ | VM_WRITE | VM_EXEC | \
  96                                  VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
  97
  98 #endif /* __KERNEL__ */
  99
 100 #include <asm-generic/page.h>
 101
 102 #endif