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Linux/arch/frv/include/asm/page.h

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

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