LXR linux-old/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 */
  21typedef struct { unsigned long pte; } pte_t;
  22typedef struct { unsigned long pmd; } pmd_t;
  23typedef struct { unsigned long pgd; } pgd_t;
  24typedef 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 */
  37extern __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 */
  87