release/src-rt-6.x/linux/linux-2.6/include/asm-frv/page.h

   1 #ifndef _ASM_PAGE_H
   2 #define _ASM_PAGE_H
   3
   4 #ifdef __KERNEL__
   5
   6 #include <asm/virtconvert.h>
   7 #include <asm/mem-layout.h>
   8 #include <asm/sections.h>
   9 #include <asm/setup.h>
  10
  11 #ifndef __ASSEMBLY__
  12
  13 #define get_user_page(vaddr)                    __get_free_page(GFP_KERNEL)
  14 #define free_user_page(page, addr)              free_page(addr)
  15
  16 #define clear_page(pgaddr)                      memset((pgaddr), 0, PAGE_SIZE)
  17 #define copy_page(to,from)                      memcpy((to), (from), PAGE_SIZE)
  18
  19 #define clear_user_page(pgaddr, vaddr, page)    memset((pgaddr), 0, PAGE_SIZE)
  20 #define copy_user_page(vto, vfrom, vaddr, topg) memcpy((vto), (vfrom), PAGE_SIZE)
  21
  22 /*
  23  * These are used to make use of C type-checking..
  24  */
  25 typedef struct { unsigned long  pte;    } pte_t;
  26 typedef struct { unsigned long  ste[64];} pmd_t;
  27 typedef struct { pmd_t          pue[1]; } pud_t;
  28 typedef struct { pud_t          pge[1]; } pgd_t;
  29 typedef struct { unsigned long  pgprot; } pgprot_t;
  30
  31 #define pte_val(x)      ((x).pte)
  32 #define pmd_val(x)      ((x).ste[0])
  33 #define pud_val(x)      ((x).pue[0])
  34 #define pgd_val(x)      ((x).pge[0])
  35 #define pgprot_val(x)   ((x).pgprot)
  36
  37 #define __pte(x)        ((pte_t) { (x) } )
  38 #define __pmd(x)        ((pmd_t) { (x) } )
  39 #define __pud(x)        ((pud_t) { (x) } )
  40 #define __pgd(x)        ((pgd_t) { (x) } )
  41 #define __pgprot(x)     ((pgprot_t) { (x) } )
  42 #define PTE_MASK        PAGE_MASK
  43
  44 /* to align the pointer to the (next) page boundary */
  45 #define PAGE_ALIGN(addr)        (((addr) + PAGE_SIZE - 1) & PAGE_MASK)
  46
  47 #define devmem_is_allowed(pfn)  1
  48
  49 #define __pa(vaddr)             virt_to_phys((void *) (unsigned long) (vaddr))
  50 #define __va(paddr)             phys_to_virt((unsigned long) (paddr))
  51
  52 #define pfn_to_kaddr(pfn)       __va((pfn) << PAGE_SHIFT)
  53
  54 extern unsigned long max_low_pfn;
  55 extern unsigned long min_low_pfn;
  56 extern unsigned long max_pfn;
  57
  58 #ifdef CONFIG_MMU
  59 #define pfn_valid(pfn)          ((pfn) < max_mapnr)
  60 #else
  61 #define ARCH_PFN_OFFSET         (PAGE_OFFSET >> PAGE_SHIFT)
  62 #define pfn_valid(pfn)          ((pfn) >= min_low_pfn && (pfn) < max_low_pfn)
  63
  64 #endif
  65
  66 #define virt_to_page(kaddr)     pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
  67 #define virt_addr_valid(kaddr)  pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
  68
  69
  70 #ifdef CONFIG_MMU
  71 #define VM_DATA_DEFAULT_FLAGS \
  72         (VM_READ | VM_WRITE | \
  73         ((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
  74                  VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
  75 #endif
  76
  77 #endif /* __ASSEMBLY__ */
  78
  79 #ifdef CONFIG_CONTIGUOUS_PAGE_ALLOC
  80 #define WANT_PAGE_VIRTUAL       1
  81 #endif
  82
  83 #include <asm-generic/memory_model.h>
  84 #include <asm-generic/page.h>
  85
  86 #endif /* __KERNEL__ */
  87
  88 #endif /* _ASM_PAGE_H */