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1da177e4 LT |
1 | #ifndef _CRIS_PAGE_H |
2 | #define _CRIS_PAGE_H | |
3 | ||
4 | #include <linux/config.h> | |
5 | #include <asm/arch/page.h> | |
6 | ||
7 | /* PAGE_SHIFT determines the page size */ | |
8 | #define PAGE_SHIFT 13 | |
9 | #ifndef __ASSEMBLY__ | |
10 | #define PAGE_SIZE (1UL << PAGE_SHIFT) | |
11 | #else | |
12 | #define PAGE_SIZE (1 << PAGE_SHIFT) | |
13 | #endif | |
14 | #define PAGE_MASK (~(PAGE_SIZE-1)) | |
15 | ||
16 | #ifdef __KERNEL__ | |
17 | ||
18 | #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) | |
19 | #define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE) | |
20 | ||
21 | #define clear_user_page(page, vaddr, pg) clear_page(page) | |
22 | #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) | |
23 | ||
24 | #define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr) | |
25 | #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE | |
26 | ||
27 | /* | |
28 | * These are used to make use of C type-checking.. | |
29 | */ | |
30 | #ifndef __ASSEMBLY__ | |
31 | typedef struct { unsigned long pte; } pte_t; | |
32 | typedef struct { unsigned long pmd; } pmd_t; | |
33 | typedef struct { unsigned long pgd; } pgd_t; | |
34 | typedef struct { unsigned long pgprot; } pgprot_t; | |
35 | #endif | |
36 | ||
37 | #define pte_val(x) ((x).pte) | |
38 | #define pmd_val(x) ((x).pmd) | |
39 | #define pgd_val(x) ((x).pgd) | |
40 | #define pgprot_val(x) ((x).pgprot) | |
41 | ||
42 | #define __pte(x) ((pte_t) { (x) } ) | |
43 | #define __pmd(x) ((pmd_t) { (x) } ) | |
44 | #define __pgd(x) ((pgd_t) { (x) } ) | |
45 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
46 | ||
47 | /* On CRIS the PFN numbers doesn't start at 0 so we have to compensate */ | |
48 | /* for that before indexing into the page table starting at mem_map */ | |
49 | #define pfn_to_page(pfn) (mem_map + ((pfn) - (PAGE_OFFSET >> PAGE_SHIFT))) | |
50 | #define page_to_pfn(page) ((unsigned long)((page) - mem_map) + (PAGE_OFFSET >> PAGE_SHIFT)) | |
51 | #define pfn_valid(pfn) (((pfn) - (PAGE_OFFSET >> PAGE_SHIFT)) < max_mapnr) | |
52 | ||
53 | /* to index into the page map. our pages all start at physical addr PAGE_OFFSET so | |
54 | * we can let the map start there. notice that we subtract PAGE_OFFSET because | |
55 | * we start our mem_map there - in other ports they map mem_map physically and | |
56 | * use __pa instead. in our system both the physical and virtual address of DRAM | |
57 | * is too high to let mem_map start at 0, so we do it this way instead (similar | |
58 | * to arm and m68k I think) | |
59 | */ | |
60 | ||
61 | #define virt_to_page(kaddr) (mem_map + (((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT)) | |
62 | #define VALID_PAGE(page) (((page) - mem_map) < max_mapnr) | |
63 | #define virt_addr_valid(kaddr) pfn_valid((unsigned)(kaddr) >> PAGE_SHIFT) | |
64 | ||
65 | /* convert a page (based on mem_map and forward) to a physical address | |
66 | * do this by figuring out the virtual address and then use __pa | |
67 | */ | |
68 | ||
69 | #define page_to_phys(page) __pa((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET) | |
70 | ||
71 | /* to align the pointer to the (next) page boundary */ | |
72 | #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) | |
73 | ||
74 | #ifndef __ASSEMBLY__ | |
75 | ||
76 | #define BUG() do { \ | |
77 | printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \ | |
78 | } while (0) | |
79 | ||
1da177e4 LT |
80 | /* Pure 2^n version of get_order */ |
81 | static inline int get_order(unsigned long size) | |
82 | { | |
83 | int order; | |
84 | ||
85 | size = (size-1) >> (PAGE_SHIFT-1); | |
86 | order = -1; | |
87 | do { | |
88 | size >>= 1; | |
89 | order++; | |
90 | } while (size); | |
91 | return order; | |
92 | } | |
93 | #endif /* __ASSEMBLY__ */ | |
94 | ||
95 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ | |
96 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
97 | ||
98 | #endif /* __KERNEL__ */ | |
99 | ||
100 | #endif /* _CRIS_PAGE_H */ | |
101 |