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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
9#ifdef __KERNEL__
10#ifndef __ASSEMBLY__
11
12extern void clear_page(void *to);
13extern void copy_page(void *to, void *from);
14
15#define clear_user_page(page, vaddr, pg) clear_page(page)
16#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
17
Mel Gorman769848c2007-07-17 04:03:05 -070018#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
19 alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
21
22/*
23 * These are used to make use of C type-checking..
24 */
25typedef struct { unsigned long pte; } pte_t;
26typedef struct { unsigned long pmd; } pmd_t;
27typedef struct { unsigned long pgd; } pgd_t;
28#define pte_val(x) ((x).pte)
29#define PTE_MASK PAGE_MASK
30
31typedef struct { unsigned long pgprot; } pgprot_t;
32
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
44/* to align the pointer to the (next) page boundary */
45#define PAGE_ALIGN(addr) (((addr) + PAGE_SIZE - 1) & PAGE_MASK)
46
47/*
48 * This handles the memory map.. We could make this a config
49 * option, but too many people screw it up, and too few need
50 * it.
51 *
52 * A __PAGE_OFFSET of 0xC0000000 means that the kernel has
53 * a virtual address space of one gigabyte, which limits the
54 * amount of physical memory you can use to about 950MB.
55 *
56 * If you want more physical memory than this then see the CONFIG_HIGHMEM4G
57 * and CONFIG_HIGHMEM64G options in the kernel configuration.
58 */
59
Linus Torvalds1da177e2005-04-16 15:20:36 -070060#define __MEMORY_START CONFIG_MEMORY_START
61#define __MEMORY_SIZE CONFIG_MEMORY_SIZE
62
63#ifdef CONFIG_MMU
64#define __PAGE_OFFSET (0x80000000)
65#else
66#define __PAGE_OFFSET (0x00000000)
67#endif
68
69#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
70#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET)
71#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET))
72
73#ifndef CONFIG_DISCONTIGMEM
74#define PFN_BASE (CONFIG_MEMORY_START >> PAGE_SHIFT)
KAMEZAWA Hiroyuki7126cff2006-03-27 01:15:42 -080075#define ARCH_PFN_OFFSET PFN_BASE
Linus Torvalds1da177e2005-04-16 15:20:36 -070076#define pfn_valid(pfn) (((pfn) - PFN_BASE) < max_mapnr)
77#endif /* !CONFIG_DISCONTIGMEM */
78
79#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
80#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
81
82#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
83 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC )
84
85#define devmem_is_allowed(x) 1
86
KAMEZAWA Hiroyuki7126cff2006-03-27 01:15:42 -080087#include <asm-generic/memory_model.h>
Stephen Rothwellfd4fd5a2005-09-03 15:54:30 -070088#include <asm-generic/page.h>
89
David Woodhouse47dbec72006-09-17 08:39:39 +010090#endif /* __KERNEL__ */
Linus Torvalds1da177e2005-04-16 15:20:36 -070091#endif /* _ASM_M32R_PAGE_H */