1 #ifndef _PARISC_PAGE_H
2 #define _PARISC_PAGE_H
3
4 /* 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
12 #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
13 #define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE)
14
15 #define clear_user_page(page, vaddr) clear_page(page)
16 #define copy_user_page(to, from, vaddr) copy_page(to, from)
17
18 /*
19 * These are used to make use of C type-checking..
20 */
21 typedef struct { unsigned long pte; } pte_t;
22 typedef struct { unsigned long pmd; } pmd_t;
23 typedef struct { unsigned long pgd; } pgd_t;
24 typedef struct { unsigned long pgprot; } pgprot_t;
25
26 #define pte_val(x) ((x).pte)
27 #define pmd_val(x) ((x).pmd)
28 #define pgd_val(x) ((x).pgd)
29 #define pgprot_val(x) ((x).pgprot)
30
31 #define __pte(x) ((pte_t) { (x) } )
32 #define __pmd(x) ((pmd_t) { (x) } )
33 #define __pgd(x) ((pgd_t) { (x) } )
34 #define __pgprot(x) ((pgprot_t) { (x) } )
35
36 /* Pure 2^n version of get_order */
37 extern __inline__ int get_order(unsigned long size)
38 {
39 int order;
40
41 size = (size-1) >> (PAGE_SHIFT-1);
42 order = -1;
43 do {
44 size >>= 1;
45 order++;
46 } while (size);
47 return order;
48 }
49
50 #endif /* !__ASSEMBLY__ */
51
52 /* to align the pointer to the (next) page boundary */
53 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
54
55 /*
56 * Tell the user there is some problem. Beep too, so we can
57 * see^H^H^Hhear bugs in early bootup as well!
58 *
59 * We don't beep yet. prumpf
60 */
61 #define BUG() do { \
62 printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \
63 } while (0)
64
65 #define PAGE_BUG(page) do { \
66 BUG(); \
67 } while (0)
68
69
70 #define LINUX_GATEWAY_SPACE 0
71 #define __PAGE_OFFSET (0xc0000000)
72
73 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
74 /* These macros don't work for 64-bit C code -- don't allow in C at all */
75 #ifdef __ASSEMBLY__
76 # define PA(x) ((x)-__PAGE_OFFSET)
77 # define VA(x) ((x)+__PAGE_OFFSET)
78 #endif
79 #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
80 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
81 #define virt_to_page(kaddr) (mem_map + (__pa(kaddr) >> PAGE_SHIFT))
82 #define VALID_PAGE(page) ((page - mem_map) < max_mapnr)
83
84 #endif /* __KERNEL__ */
85
86 #endif /* _PARISC_PAGE_H */
87
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