include/asm-v850/page.h

   1 /*
   2  * include/asm-v850/page.h -- VM ops
   3  *
   4  *  Copyright (C) 2001,02,03,05  NEC Electronics Corporation
   5  *  Copyright (C) 2001,02,03,05  Miles Bader <miles@gnu.org>
   6  *
   7  * This file is subject to the terms and conditions of the GNU General
   8  * Public License.  See the file COPYING in the main directory of this
   9  * archive for more details.
  10  *
  11  * Written by Miles Bader <miles@gnu.org>
  12  */
  13
  14 #ifndef __V850_PAGE_H__
  15 #define __V850_PAGE_H__
  16
  17 #ifdef __KERNEL__
  18
  19 #include <asm/machdep.h>
  20
  21
  22 #define PAGE_SHIFT      12
  23 #define PAGE_SIZE       (1UL << PAGE_SHIFT)
  24 #define PAGE_MASK       (~(PAGE_SIZE-1))
  25
  26
  27 /*
  28  * PAGE_OFFSET -- the first address of the first page of memory. For archs with
  29  * no MMU this corresponds to the first free page in physical memory (aligned
  30  * on a page boundary).
  31  */
  32 #ifndef PAGE_OFFSET
  33 #define PAGE_OFFSET  0x0000000
  34 #endif
  35
  36
  37 #ifndef __ASSEMBLY__
  38
  39 #define STRICT_MM_TYPECHECKS
  40
  41 #define clear_page(page)        memset ((void *)(page), 0, PAGE_SIZE)
  42 #define copy_page(to, from)     memcpy ((void *)(to), (void *)from, PAGE_SIZE)
  43
  44 #define clear_user_page(addr, vaddr, page)      \
  45         do {    clear_page(addr);               \
  46                 flush_dcache_page(page);        \
  47         } while (0)
  48 #define copy_user_page(to, from, vaddr, page)   \
  49         do {    copy_page(to, from);            \
  50                 flush_dcache_page(page);        \
  51         } while (0)
  52
  53 #ifdef STRICT_MM_TYPECHECKS
  54 /*
  55  * These are used to make use of C type-checking..
  56  */
  57
  58 typedef struct { unsigned long pte; } pte_t;
  59 typedef struct { unsigned long pmd; } pmd_t;
  60 typedef struct { unsigned long pgd; } pgd_t;
  61 typedef struct { unsigned long pgprot; } pgprot_t;
  62
  63 #define pte_val(x)      ((x).pte)
  64 #define pmd_val(x)      ((x).pmd)
  65 #define pgd_val(x)      ((x).pgd)
  66 #define pgprot_val(x)   ((x).pgprot)
  67
  68 #define __pte(x)        ((pte_t) { (x) } )
  69 #define __pmd(x)        ((pmd_t) { (x) } )
  70 #define __pgd(x)        ((pgd_t) { (x) } )
  71 #define __pgprot(x)     ((pgprot_t) { (x) } )
  72
  73 #else /* !STRICT_MM_TYPECHECKS */
  74 /*
  75  * .. while these make it easier on the compiler
  76  */
  77
  78 typedef unsigned long pte_t;
  79 typedef unsigned long pmd_t;
  80 typedef unsigned long pgd_t;
  81 typedef unsigned long pgprot_t;
  82
  83 #define pte_val(x)      (x)
  84 #define pmd_val(x)      (x)
  85 #define pgd_val(x)      (x)
  86 #define pgprot_val(x)   (x)
  87
  88 #define __pte(x)        (x)
  89 #define __pmd(x)        (x)
  90 #define __pgd(x)        (x)
  91 #define __pgprot(x)     (x)
  92
  93 #endif /* STRICT_MM_TYPECHECKS */
  94
  95 #endif /* !__ASSEMBLY__ */
  96
  97
  98 /* to align the pointer to the (next) page boundary */
  99 #define PAGE_ALIGN(addr)        (((addr) + PAGE_SIZE - 1) & PAGE_MASK)
 100
 101
 102 /* No current v850 processor has virtual memory.  */
 103 #define __virt_to_phys(addr)    (addr)
 104 #define __phys_to_virt(addr)    (addr)
 105
 106 #define virt_to_pfn(kaddr)      (__virt_to_phys (kaddr) >> PAGE_SHIFT)
 107 #define pfn_to_virt(pfn)        __phys_to_virt ((pfn) << PAGE_SHIFT)
 108
 109 #define MAP_NR(kaddr) \
 110   (((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT)
 111 #define virt_to_page(kaddr)     (mem_map + MAP_NR (kaddr))
 112 #define page_to_virt(page) \
 113   ((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
 114
 115 #define ARCH_PFN_OFFSET         (PAGE_OFFSET >> PAGE_SHIFT)
 116 #define pfn_valid(pfn)          ((pfn) < max_mapnr)
 117
 118 #define virt_addr_valid(kaddr)                                          \
 119   (((void *)(kaddr) >= (void *)PAGE_OFFSET) && MAP_NR (kaddr) < max_mapnr)
 120
 121
 122 #define __pa(x)              __virt_to_phys ((unsigned long)(x))
 123 #define __va(x)              ((void *)__phys_to_virt ((unsigned long)(x)))
 124
 125
 126 #include <asm-generic/memory_model.h>
 127 #include <asm-generic/page.h>
 128
 129 #endif /* KERNEL */
 130
 131 #endif /* __V850_PAGE_H__ */