root/arch/unicore32/include/asm/page.h

INCLUDED FROM

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * linux/arch/unicore32/include/asm/page.h
   4  *
   5  * Code specific to PKUnity SoC and UniCore ISA
   6  *
   7  * Copyright (C) 2001-2010 GUAN Xue-tao
   8  */
   9 #ifndef __UNICORE_PAGE_H__
  10 #define __UNICORE_PAGE_H__
  11 
  12 /* PAGE_SHIFT determines the page size */
  13 #define PAGE_SHIFT              12
  14 #define PAGE_SIZE               (_AC(1, UL) << PAGE_SHIFT)
  15 #define PAGE_MASK               (~(PAGE_SIZE-1))
  16 
  17 #ifndef __ASSEMBLY__
  18 
  19 struct page;
  20 struct vm_area_struct;
  21 
  22 #define clear_page(page)        memset((void *)(page), 0, PAGE_SIZE)
  23 extern void copy_page(void *to, const void *from);
  24 
  25 #define clear_user_page(page, vaddr, pg)        clear_page(page)
  26 #define copy_user_page(to, from, vaddr, pg)     copy_page(to, from)
  27 
  28 #undef STRICT_MM_TYPECHECKS
  29 
  30 #ifdef STRICT_MM_TYPECHECKS
  31 /*
  32  * These are used to make use of C type-checking..
  33  */
  34 typedef struct { unsigned long pte; } pte_t;
  35 typedef struct { unsigned long pgd; } pgd_t;
  36 typedef struct { unsigned long pgprot; } pgprot_t;
  37 
  38 #define pte_val(x)      ((x).pte)
  39 #define pgd_val(x)      ((x).pgd)
  40 #define pgprot_val(x)   ((x).pgprot)
  41 
  42 #define __pte(x)        ((pte_t) { (x) })
  43 #define __pgd(x)        ((pgd_t) { (x) })
  44 #define __pgprot(x)     ((pgprot_t) { (x) })
  45 
  46 #else
  47 /*
  48  * .. while these make it easier on the compiler
  49  */
  50 typedef unsigned long pte_t;
  51 typedef unsigned long pgd_t;
  52 typedef unsigned long pgprot_t;
  53 
  54 #define pte_val(x)      (x)
  55 #define pgd_val(x)      (x)
  56 #define pgprot_val(x)   (x)
  57 
  58 #define __pte(x)        (x)
  59 #define __pgd(x)        (x)
  60 #define __pgprot(x)     (x)
  61 
  62 #endif /* STRICT_MM_TYPECHECKS */
  63 
  64 typedef struct page *pgtable_t;
  65 
  66 extern int pfn_valid(unsigned long);
  67 
  68 #include <asm/memory.h>
  69 
  70 #endif /* !__ASSEMBLY__ */
  71 
  72 #define VM_DATA_DEFAULT_FLAGS \
  73         (VM_READ | VM_WRITE | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
  74 
  75 #include <asm-generic/getorder.h>
  76 
  77 #endif