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Linux kernel mirror (for testing)
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kernel
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linux
1#ifndef _ASM_M32R_PAGE_H
2#define _ASM_M32R_PAGE_H
3
4
5/* PAGE_SHIFT determines the page size */
6#define PAGE_SHIFT 12
7#define PAGE_SIZE (1UL << PAGE_SHIFT)
8#define PAGE_MASK (~(PAGE_SIZE-1))
9
10#ifdef __KERNEL__
11#ifndef __ASSEMBLY__
12
13extern void clear_page(void *to);
14extern void copy_page(void *to, void *from);
15
16#define clear_user_page(page, vaddr, pg) clear_page(page)
17#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
18
19#define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr)
20#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
60
61/* This handles the memory map.. */
62
63#define __MEMORY_START CONFIG_MEMORY_START
64#define __MEMORY_SIZE CONFIG_MEMORY_SIZE
65
66#ifdef CONFIG_MMU
67#define __PAGE_OFFSET (0x80000000)
68#else
69#define __PAGE_OFFSET (0x00000000)
70#endif
71
72#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
73#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET)
74#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET))
75
76#ifndef CONFIG_DISCONTIGMEM
77#define PFN_BASE (CONFIG_MEMORY_START >> PAGE_SHIFT)
78#define ARCH_PFN_OFFSET PFN_BASE
79#define pfn_valid(pfn) (((pfn) - PFN_BASE) < max_mapnr)
80#endif /* !CONFIG_DISCONTIGMEM */
81
82#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
83#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
84
85#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
86 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC )
87
88#define devmem_is_allowed(x) 1
89
90#include <asm-generic/memory_model.h>
91#include <asm-generic/page.h>
92
93#endif /* __KERNEL__ */
94#endif /* _ASM_M32R_PAGE_H */
95