Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
[wrt350n-kernel.git] / include / asm-v850 / page.h
blob74a539a9bd5952b246e4450cbb6136b22e59bb3c
1 /*
2 * include/asm-v850/page.h -- VM ops
4 * Copyright (C) 2001,02,03,05 NEC Electronics Corporation
5 * Copyright (C) 2001,02,03,05 Miles Bader <miles@gnu.org>
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.
11 * Written by Miles Bader <miles@gnu.org>
14 #ifndef __V850_PAGE_H__
15 #define __V850_PAGE_H__
17 #include <asm/machdep.h>
20 #define PAGE_SHIFT 12
21 #define PAGE_SIZE (1UL << PAGE_SHIFT)
22 #define PAGE_MASK (~(PAGE_SIZE-1))
26 * PAGE_OFFSET -- the first address of the first page of memory. For archs with
27 * no MMU this corresponds to the first free page in physical memory (aligned
28 * on a page boundary).
30 #ifndef PAGE_OFFSET
31 #define PAGE_OFFSET 0x0000000
32 #endif
35 #ifndef __ASSEMBLY__
37 #define STRICT_MM_TYPECHECKS
39 #define clear_page(page) memset ((void *)(page), 0, PAGE_SIZE)
40 #define copy_page(to, from) memcpy ((void *)(to), (void *)from, PAGE_SIZE)
42 #define clear_user_page(addr, vaddr, page) \
43 do { clear_page(addr); \
44 flush_dcache_page(page); \
45 } while (0)
46 #define copy_user_page(to, from, vaddr, page) \
47 do { copy_page(to, from); \
48 flush_dcache_page(page); \
49 } while (0)
51 #ifdef STRICT_MM_TYPECHECKS
53 * These are used to make use of C type-checking..
56 typedef struct { unsigned long pte; } pte_t;
57 typedef struct { unsigned long pmd; } pmd_t;
58 typedef struct { unsigned long pgd; } pgd_t;
59 typedef struct { unsigned long pgprot; } pgprot_t;
60 typedef struct page *pgtable_t;
62 #define pte_val(x) ((x).pte)
63 #define pmd_val(x) ((x).pmd)
64 #define pgd_val(x) ((x).pgd)
65 #define pgprot_val(x) ((x).pgprot)
67 #define __pte(x) ((pte_t) { (x) } )
68 #define __pmd(x) ((pmd_t) { (x) } )
69 #define __pgd(x) ((pgd_t) { (x) } )
70 #define __pgprot(x) ((pgprot_t) { (x) } )
72 #else /* !STRICT_MM_TYPECHECKS */
74 * .. while these make it easier on the compiler
77 typedef unsigned long pte_t;
78 typedef unsigned long pmd_t;
79 typedef unsigned long pgd_t;
80 typedef unsigned long pgprot_t;
82 #define pte_val(x) (x)
83 #define pmd_val(x) (x)
84 #define pgd_val(x) (x)
85 #define pgprot_val(x) (x)
87 #define __pte(x) (x)
88 #define __pmd(x) (x)
89 #define __pgd(x) (x)
90 #define __pgprot(x) (x)
92 #endif /* STRICT_MM_TYPECHECKS */
94 #endif /* !__ASSEMBLY__ */
97 /* to align the pointer to the (next) page boundary */
98 #define PAGE_ALIGN(addr) (((addr) + PAGE_SIZE - 1) & PAGE_MASK)
101 /* No current v850 processor has virtual memory. */
102 #define __virt_to_phys(addr) (addr)
103 #define __phys_to_virt(addr) (addr)
105 #define virt_to_pfn(kaddr) (__virt_to_phys (kaddr) >> PAGE_SHIFT)
106 #define pfn_to_virt(pfn) __phys_to_virt ((pfn) << PAGE_SHIFT)
108 #define MAP_NR(kaddr) \
109 (((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT)
110 #define virt_to_page(kaddr) (mem_map + MAP_NR (kaddr))
111 #define page_to_virt(page) \
112 ((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
114 #define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT)
115 #define pfn_valid(pfn) ((pfn) < max_mapnr)
117 #define virt_addr_valid(kaddr) \
118 (((void *)(kaddr) >= (void *)PAGE_OFFSET) && MAP_NR (kaddr) < max_mapnr)
121 #define __pa(x) __virt_to_phys ((unsigned long)(x))
122 #define __va(x) ((void *)__phys_to_virt ((unsigned long)(x)))
125 #include <asm-generic/memory_model.h>
126 #include <asm-generic/page.h>
128 #endif /* __V850_PAGE_H__ */