arch/frv/include/asm/page.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_PAGE_H
   3 #define _ASM_PAGE_H
   4
   5 #include <asm/virtconvert.h>
   6 #include <asm/mem-layout.h>
   7 #include <asm/sections.h>
   8 #include <asm/setup.h>
   9
  10 #ifndef __ASSEMBLY__
  11
  12 #define clear_page(pgaddr)                      memset((pgaddr), 0, PAGE_SIZE)
  13 #define copy_page(to,from)                      memcpy((to), (from), PAGE_SIZE)
  14
  15 #define clear_user_page(pgaddr, vaddr, page)    memset((pgaddr), 0, PAGE_SIZE)
  16 #define copy_user_page(vto, vfrom, vaddr, topg) memcpy((vto), (vfrom), PAGE_SIZE)
  17
  18 /*
  19  * These are used to make use of C type-checking..
  20  */
  21 typedef struct { unsigned long  pte;    } pte_t;
  22 typedef struct { unsigned long  ste[64];} pmd_t;
  23 typedef struct { pmd_t          pue[1]; } pud_t;
  24 typedef struct { pud_t          pge[1]; } pgd_t;
  25 typedef struct { unsigned long  pgprot; } pgprot_t;
  26 typedef struct page *pgtable_t;
  27
  28 #define pte_val(x)      ((x).pte)
  29 #define pmd_val(x)      ((x).ste[0])
  30 #define pud_val(x)      ((x).pue[0])
  31 #define pgd_val(x)      ((x).pge[0])
  32 #define pgprot_val(x)   ((x).pgprot)
  33
  34 #define __pte(x)        ((pte_t) { (x) } )
  35 #define __pmd(x)        ((pmd_t) { { (x) } } )
  36 #define __pud(x)        ((pud_t) { (x) } )
  37 #define __pgd(x)        ((pgd_t) { (x) } )
  38 #define __pgprot(x)     ((pgprot_t) { (x) } )
  39 #define PTE_MASK        PAGE_MASK
  40
  41 #define devmem_is_allowed(pfn)  1
  42
  43 #define __pa(vaddr)             virt_to_phys((void *) (unsigned long) (vaddr))
  44 #define __va(paddr)             phys_to_virt((unsigned long) (paddr))
  45
  46 #define pfn_to_kaddr(pfn)       __va((pfn) << PAGE_SHIFT)
  47
  48 extern unsigned long max_low_pfn;
  49 extern unsigned long min_low_pfn;
  50 extern unsigned long max_pfn;
  51
  52 #ifdef CONFIG_MMU
  53 #define pfn_valid(pfn)          ((pfn) < max_mapnr)
  54 #else
  55 #define ARCH_PFN_OFFSET         (PAGE_OFFSET >> PAGE_SHIFT)
  56 #define pfn_valid(pfn)          ((pfn) >= min_low_pfn && (pfn) < max_low_pfn)
  57
  58 #endif
  59
  60 #define virt_to_page(kaddr)     pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
  61 #define virt_addr_valid(kaddr)  pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
  62
  63
  64 #define VM_DATA_DEFAULT_FLAGS \
  65         (VM_READ | VM_WRITE | \
  66         ((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
  67                  VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
  68
  69 #endif /* __ASSEMBLY__ */
  70
  71 #include <asm-generic/memory_model.h>
  72 #include <asm-generic/getorder.h>
  73
  74 #endif /* _ASM_PAGE_H */