include/asm-parisc/page.h

   1 #ifndef _PARISC_PAGE_H
   2 #define _PARISC_PAGE_H
   3
   4 /* PAGE_SHIFT determines the page size */
   5 #define PAGE_SHIFT      12
   6 #define PAGE_SIZE       (1UL << PAGE_SHIFT)
   7 #define PAGE_MASK       (~(PAGE_SIZE-1))
   8
   9 #ifdef __KERNEL__
  10 #ifndef __ASSEMBLY__
  11
  12 #define clear_page(page)        memset((void *)(page), 0, PAGE_SIZE)
  13 #define copy_page(to,from)      memcpy((void *)(to), (void *)(from), PAGE_SIZE)
  14
  15 #define clear_user_page(page, vaddr) clear_page(page)
  16 #define copy_user_page(to, from, vaddr) copy_page(to, from)
  17
  18 /*
  19  * These are used to make use of C type-checking..
  20  */
  21 typedef struct { unsigned long pte; } pte_t;
  22 typedef struct { unsigned long pmd; } pmd_t;
  23 typedef struct { unsigned long pgd; } pgd_t;
  24 typedef struct { unsigned long pgprot; } pgprot_t;
  25
  26 #define pte_val(x)      ((x).pte)
  27 #define pmd_val(x)      ((x).pmd)
  28 #define pgd_val(x)      ((x).pgd)
  29 #define pgprot_val(x)   ((x).pgprot)
  30
  31 #define __pte(x)        ((pte_t) { (x) } )
  32 #define __pmd(x)        ((pmd_t) { (x) } )
  33 #define __pgd(x)        ((pgd_t) { (x) } )
  34 #define __pgprot(x)     ((pgprot_t) { (x) } )
  35
  36 /* Pure 2^n version of get_order */
  37 extern __inline__ int get_order(unsigned long size)
  38 {
  39         int order;
  40
  41         size = (size-1) >> (PAGE_SHIFT-1);
  42         order = -1;
  43         do {
  44                 size >>= 1;
  45                 order++;
  46         } while (size);
  47         return order;
  48 }
  49
  50 #endif /* !__ASSEMBLY__ */
  51
  52 /* to align the pointer to the (next) page boundary */
  53 #define PAGE_ALIGN(addr)        (((addr)+PAGE_SIZE-1)&PAGE_MASK)
  54
  55 /*
  56  * Tell the user there is some problem. Beep too, so we can
  57  * see^H^H^Hhear bugs in early bootup as well!
  58  *
  59  * We don't beep yet.  prumpf
  60  */
  61 #define BUG() do { \
  62         printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \
  63 } while (0)
  64
  65 #define PAGE_BUG(page) do { \
  66         BUG(); \
  67 } while (0)
  68
  69
  70 #define LINUX_GATEWAY_SPACE     0
  71 #define __PAGE_OFFSET           (0xc0000000)
  72
  73 #define PAGE_OFFSET             ((unsigned long)__PAGE_OFFSET)
  74 /* These macros don't work for 64-bit C code -- don't allow in C at all */
  75 #ifdef __ASSEMBLY__
  76 #   define PA(x)        ((x)-__PAGE_OFFSET)
  77 #   define VA(x)        ((x)+__PAGE_OFFSET)
  78 #endif
  79 #define __pa(x)                 ((unsigned long)(x)-PAGE_OFFSET)
  80 #define __va(x)                 ((void *)((unsigned long)(x)+PAGE_OFFSET))
  81 #define virt_to_page(kaddr)     (mem_map + (__pa(kaddr) >> PAGE_SHIFT))
  82 #define VALID_PAGE(page)        ((page - mem_map) < max_mapnr)
  83
  84 #endif /* __KERNEL__ */
  85
  86 #endif /* _PARISC_PAGE_H */