release/src-rt-6.x.4708/linux/linux-2.6.36/arch/score/include/asm/page.h

   1 #ifndef _ASM_SCORE_PAGE_H
   2 #define _ASM_SCORE_PAGE_H
   3
   4 #include <linux/pfn.h>
   5 #include <linux/const.h>
   6
   7 /* PAGE_SHIFT determines the page size */
   8 #define PAGE_SHIFT      (12)
   9 #define PAGE_SIZE       (_AC(1,UL) << PAGE_SHIFT)
  10 #define PAGE_MASK       (~(PAGE_SIZE-1))
  11
  12 #ifdef __KERNEL__
  13
  14 #ifndef __ASSEMBLY__
  15
  16 #define PAGE_UP(addr)   (((addr)+((PAGE_SIZE)-1))&(~((PAGE_SIZE)-1)))
  17 #define PAGE_DOWN(addr) ((addr)&(~((PAGE_SIZE)-1)))
  18
  19 /* align addr on a size boundary - adjust address up/down if needed */
  20 #define _ALIGN_UP(addr, size)   (((addr)+((size)-1))&(~((size)-1)))
  21 #define _ALIGN_DOWN(addr, size) ((addr)&(~((size)-1)))
  22
  23 /* align addr on a size boundary - adjust address up if needed */
  24 #define _ALIGN(addr, size)      _ALIGN_UP(addr, size)
  25
  26 /*
  27  * PAGE_OFFSET -- the first address of the first page of memory. When not
  28  * using MMU this corresponds to the first free page in physical memory (aligned
  29  * on a page boundary).
  30  */
  31 #define PAGE_OFFSET             (0xA0000000UL)
  32
  33 #define clear_page(pgaddr)                      memset((pgaddr), 0, PAGE_SIZE)
  34 #define copy_page(to, from)                     memcpy((to), (from), PAGE_SIZE)
  35
  36 #define clear_user_page(pgaddr, vaddr, page)    memset((pgaddr), 0, PAGE_SIZE)
  37 #define copy_user_page(vto, vfrom, vaddr, topg) \
  38                         memcpy((vto), (vfrom), PAGE_SIZE)
  39
  40 /*
  41  * These are used to make use of C type-checking..
  42  */
  43
  44 typedef struct { unsigned long pte; } pte_t;            /* page table entry */
  45 typedef struct { unsigned long pgd; } pgd_t;            /* PGD table entry */
  46 typedef struct { unsigned long pgprot; } pgprot_t;
  47 typedef struct page *pgtable_t;
  48
  49 #define pte_val(x)      ((x).pte)
  50 #define pgd_val(x)      ((x).pgd)
  51 #define pgprot_val(x)   ((x).pgprot)
  52
  53 #define __pte(x)        ((pte_t) { (x) })
  54 #define __pgd(x)        ((pgd_t) { (x) })
  55 #define __pgprot(x)     ((pgprot_t) { (x) })
  56
  57 extern unsigned long max_low_pfn;
  58 extern unsigned long min_low_pfn;
  59 extern unsigned long max_pfn;
  60
  61 #define __pa(x)         ((unsigned long)(x) - PAGE_OFFSET)
  62 #define __va(x)         ((void *)((unsigned long) (x) + PAGE_OFFSET))
  63
  64 #define phys_to_pfn(phys)       (PFN_DOWN(phys))
  65 #define pfn_to_phys(pfn)        (PFN_PHYS(pfn))
  66
  67 #define virt_to_pfn(vaddr)      (phys_to_pfn((__pa(vaddr))))
  68 #define pfn_to_virt(pfn)        __va(pfn_to_phys((pfn)))
  69
  70 #define virt_to_page(vaddr)     (pfn_to_page(virt_to_pfn(vaddr)))
  71 #define page_to_virt(page)      (pfn_to_virt(page_to_pfn(page)))
  72
  73 #define page_to_phys(page)      (pfn_to_phys(page_to_pfn(page)))
  74 #define page_to_bus(page)       (page_to_phys(page))
  75 #define phys_to_page(paddr)     (pfn_to_page(phys_to_pfn(paddr)))
  76
  77 #define pfn_valid(pfn)          (((pfn) >= min_low_pfn) && ((pfn) < max_low_pfn))
  78
  79 #define ARCH_PFN_OFFSET         (PAGE_OFFSET >> PAGE_SHIFT)
  80
  81 #endif /* __ASSEMBLY__ */
  82
  83 #define virt_addr_valid(vaddr)  (pfn_valid(virt_to_pfn(vaddr)))
  84
  85 #endif /* __KERNEL__ */
  86
  87 #define VM_DATA_DEFAULT_FLAGS   (VM_READ | VM_WRITE | VM_EXEC | \
  88                                  VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
  89
  90 #include <asm-generic/memory_model.h>
  91 #include <asm-generic/getorder.h>
  92
  93 #endif /* _ASM_SCORE_PAGE_H */