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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _ASM_M32R_PAGE_H
2#define _ASM_M32R_PAGE_H
3
Linus Torvalds1da177e2005-04-16 15:20:36 -07004/* PAGE_SHIFT determines the page size */
5#define PAGE_SHIFT 12
6#define PAGE_SIZE (1UL << PAGE_SHIFT)
7#define PAGE_MASK (~(PAGE_SIZE-1))
8
Linus Torvalds1da177e2005-04-16 15:20:36 -07009#ifndef __ASSEMBLY__
10
11extern void clear_page(void *to);
12extern void copy_page(void *to, void *from);
13
14#define clear_user_page(page, vaddr, pg) clear_page(page)
15#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
16
Mel Gorman769848c2007-07-17 04:03:05 -070017#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
18 alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
20
21/*
22 * These are used to make use of C type-checking..
23 */
24typedef struct { unsigned long pte; } pte_t;
25typedef struct { unsigned long pmd; } pmd_t;
26typedef struct { unsigned long pgd; } pgd_t;
27#define pte_val(x) ((x).pte)
28#define PTE_MASK PAGE_MASK
29
30typedef struct { unsigned long pgprot; } pgprot_t;
Martin Schwidefsky2f569af2008-02-08 04:22:04 -080031typedef struct page *pgtable_t;
Linus Torvalds1da177e2005-04-16 15:20:36 -070032
33#define pmd_val(x) ((x).pmd)
34#define pgd_val(x) ((x).pgd)
35#define pgprot_val(x) ((x).pgprot)
36
37#define __pte(x) ((pte_t) { (x) } )
38#define __pmd(x) ((pmd_t) { (x) } )
39#define __pgd(x) ((pgd_t) { (x) } )
40#define __pgprot(x) ((pgprot_t) { (x) } )
41
42#endif /* !__ASSEMBLY__ */
43
Linus Torvalds1da177e2005-04-16 15:20:36 -070044/*
45 * This handles the memory map.. We could make this a config
46 * option, but too many people screw it up, and too few need
47 * it.
48 *
49 * A __PAGE_OFFSET of 0xC0000000 means that the kernel has
50 * a virtual address space of one gigabyte, which limits the
51 * amount of physical memory you can use to about 950MB.
52 *
53 * If you want more physical memory than this then see the CONFIG_HIGHMEM4G
54 * and CONFIG_HIGHMEM64G options in the kernel configuration.
55 */
56
Linus Torvalds1da177e2005-04-16 15:20:36 -070057#define __MEMORY_START CONFIG_MEMORY_START
58#define __MEMORY_SIZE CONFIG_MEMORY_SIZE
59
60#ifdef CONFIG_MMU
61#define __PAGE_OFFSET (0x80000000)
62#else
63#define __PAGE_OFFSET (0x00000000)
64#endif
65
66#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
67#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET)
68#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET))
69
70#ifndef CONFIG_DISCONTIGMEM
71#define PFN_BASE (CONFIG_MEMORY_START >> PAGE_SHIFT)
KAMEZAWA Hiroyuki7126cff2006-03-27 01:15:42 -080072#define ARCH_PFN_OFFSET PFN_BASE
Linus Torvalds1da177e2005-04-16 15:20:36 -070073#define pfn_valid(pfn) (((pfn) - PFN_BASE) < max_mapnr)
74#endif /* !CONFIG_DISCONTIGMEM */
75
76#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
77#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
78
79#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
80 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC )
81
82#define devmem_is_allowed(x) 1
83
KAMEZAWA Hiroyuki7126cff2006-03-27 01:15:42 -080084#include <asm-generic/memory_model.h>
Stephen Rothwellfd4fd5a2005-09-03 15:54:30 -070085#include <asm-generic/page.h>
86
Linus Torvalds1da177e2005-04-16 15:20:36 -070087#endif /* _ASM_M32R_PAGE_H */