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 #include <asm/cache.h>
13
14 #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
15 #define copy_page(to,from) copy_user_page_asm((void *)(to), (void *)(from))
16
17 extern void purge_kernel_dcache_page(unsigned long);
18 extern void copy_user_page_asm(void *to, void *from);
19 extern void clear_user_page_asm(void *page, unsigned long vaddr);
20
21 static inline void
copy_user_page(void * to,void * from,unsigned long vaddr)22 copy_user_page(void *to, void *from, unsigned long vaddr)
23 {
24 copy_user_page_asm(to, from);
25 flush_kernel_dcache_page(to);
26 }
27
28 static inline void
clear_user_page(void * page,unsigned long vaddr)29 clear_user_page(void *page, unsigned long vaddr)
30 {
31 purge_kernel_dcache_page((unsigned long)page);
32 clear_user_page_asm(page, vaddr);
33 }
34
35 /*
36 * These are used to make use of C type-checking..
37 */
38 typedef struct { unsigned long pte; } pte_t;
39 typedef struct { unsigned long pmd; } pmd_t;
40 typedef struct { unsigned long pgd; } pgd_t;
41 typedef struct { unsigned long pgprot; } pgprot_t;
42
43 #define pte_val(x) ((x).pte)
44 #define pmd_val(x) ((x).pmd)
45 #define pgd_val(x) ((x).pgd)
46 #define pgprot_val(x) ((x).pgprot)
47
48 #define __pte(x) ((pte_t) { (x) } )
49 #define __pmd(x) ((pmd_t) { (x) } )
50 #define __pgd(x) ((pgd_t) { (x) } )
51 #define __pgprot(x) ((pgprot_t) { (x) } )
52
53 /* Pure 2^n version of get_order */
get_order(unsigned long size)54 extern __inline__ int get_order(unsigned long size)
55 {
56 int order;
57
58 size = (size-1) >> (PAGE_SHIFT-1);
59 order = -1;
60 do {
61 size >>= 1;
62 order++;
63 } while (size);
64 return order;
65 }
66
67 #ifdef __LP64__
68 #define MAX_PHYSMEM_RANGES 8 /* Fix the size for now (current known max is 3) */
69 #else
70 #define MAX_PHYSMEM_RANGES 1 /* First range is only range that fits in 32 bits */
71 #endif
72
73 typedef struct __physmem_range {
74 unsigned long start_pfn;
75 unsigned long pages; /* PAGE_SIZE pages */
76 } physmem_range_t;
77
78 extern physmem_range_t pmem_ranges[];
79 extern int npmem_ranges;
80
81 #endif /* !__ASSEMBLY__ */
82
83 /* to align the pointer to the (next) page boundary */
84 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
85
86 /*
87 * Tell the user there is some problem. Beep too, so we can
88 * see^H^H^Hhear bugs in early bootup as well!
89 *
90 * We don't beep yet. prumpf
91 */
92 #define BUG() do { \
93 printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \
94 } while (0)
95
96 #define PAGE_BUG(page) do { \
97 BUG(); \
98 } while (0)
99
100
101 #define LINUX_GATEWAY_SPACE 0
102 #define __PAGE_OFFSET (0x10000000)
103
104 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
105 /* These macros don't work for 64-bit C code -- don't allow in C at all */
106 #ifdef __ASSEMBLY__
107 # define PA(x) ((x)-__PAGE_OFFSET)
108 # define VA(x) ((x)+__PAGE_OFFSET)
109 #endif
110 #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
111 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
112 #ifndef CONFIG_DISCONTIGMEM
113 #define virt_to_page(kaddr) (mem_map + (__pa(kaddr) >> PAGE_SHIFT))
114 #define VALID_PAGE(page) ((page - mem_map) < max_mapnr)
115 #endif /* !CONFIG_DISCONTIGMEM */
116
117 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
118 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
119
120 #endif /* __KERNEL__ */
121
122 #endif /* _PARISC_PAGE_H */
123