include/asm-h8300/page.h

   1 #ifndef _H8300_PAGE_H
   2 #define _H8300_PAGE_H
   3
   4 #include <linux/config.h>
   5
   6 /* PAGE_SHIFT determines the page size */
   7
   8 #define PAGE_SHIFT      (12)
   9 #define PAGE_SIZE       (1UL << PAGE_SHIFT)
  10 #define PAGE_MASK       (~(PAGE_SIZE-1))
  11
  12 #ifdef __KERNEL__
  13
  14 #include <asm/setup.h>
  15
  16 #if !defined(CONFIG_SMALL_TASKS) && PAGE_SHIFT < 13
  17 #define KTHREAD_SIZE (8192)
  18 #else
  19 #define KTHREAD_SIZE PAGE_SIZE
  20 #endif
  21
  22 #ifndef __ASSEMBLY__
  23
  24 #define get_user_page(vaddr)            __get_free_page(GFP_KERNEL)
  25 #define free_user_page(page, addr)      free_page(addr)
  26
  27 #define clear_page(page)        memset((page), 0, PAGE_SIZE)
  28 #define copy_page(to,from)      memcpy((to), (from), PAGE_SIZE)
  29
  30 #define clear_user_page(page, vaddr, pg)        clear_page(page)
  31 #define copy_user_page(to, from, vaddr, pg)     copy_page(to, from)
  32
  33 #define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr)
  34 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
  35
  36 /*
  37  * These are used to make use of C type-checking..
  38  */
  39 typedef struct { unsigned long pte; } pte_t;
  40 typedef struct { unsigned long pmd[16]; } pmd_t;
  41 typedef struct { unsigned long pgd; } pgd_t;
  42 typedef struct { unsigned long pgprot; } pgprot_t;
  43
  44 #define pte_val(x)      ((x).pte)
  45 #define pmd_val(x)      ((&x)->pmd[0])
  46 #define pgd_val(x)      ((x).pgd)
  47 #define pgprot_val(x)   ((x).pgprot)
  48
  49 #define __pte(x)        ((pte_t) { (x) } )
  50 #define __pmd(x)        ((pmd_t) { (x) } )
  51 #define __pgd(x)        ((pgd_t) { (x) } )
  52 #define __pgprot(x)     ((pgprot_t) { (x) } )
  53
  54 /* to align the pointer to the (next) page boundary */
  55 #define PAGE_ALIGN(addr)        (((addr)+PAGE_SIZE-1)&PAGE_MASK)
  56
  57 /* Pure 2^n version of get_order */
  58 extern __inline__ int get_order(unsigned long size)
  59 {
  60         int order;
  61
  62         size = (size-1) >> (PAGE_SHIFT-1);
  63         order = -1;
  64         do {
  65                 size >>= 1;
  66                 order++;
  67         } while (size);
  68         return order;
  69 }
  70
  71 extern unsigned long memory_start;
  72 extern unsigned long memory_end;
  73
  74 #endif /* !__ASSEMBLY__ */
  75
  76 #include <asm/page_offset.h>
  77
  78 #define PAGE_OFFSET             (PAGE_OFFSET_RAW)
  79
  80 #ifndef __ASSEMBLY__
  81
  82 #define __pa(vaddr)             virt_to_phys(vaddr)
  83 #define __va(paddr)             phys_to_virt((unsigned long)paddr)
  84
  85 #define virt_to_pfn(kaddr)      (__pa(kaddr) >> PAGE_SHIFT)
  86 #define pfn_to_virt(pfn)        __va((pfn) << PAGE_SHIFT)
  87
  88 #define MAP_NR(addr)            (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT)
  89 #define virt_to_page(addr)      (mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
  90 #define virt_to_page(addr)      (mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
  91 #define page_to_virt(page)      ((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
  92 #define pfn_valid(page)         (page < max_mapnr)
  93
  94 #define pfn_to_page(pfn)        virt_to_page(pfn_to_virt(pfn))
  95 #define page_to_pfn(page)       virt_to_pfn(page_to_virt(page))
  96
  97 #define virt_addr_valid(kaddr)  (((void *)(kaddr) >= (void *)PAGE_OFFSET) && \
  98                                 ((void *)(kaddr) < (void *)memory_end))
  99
 100 #endif /* __ASSEMBLY__ */
 101
 102 #endif /* __KERNEL__ */
 103
 104 #endif /* _H8300_PAGE_H */