1#ifndef _ASMARM_PAGE_H
2#define _ASMARM_PAGE_H
3
4#include <asm/proc/page.h>
5
6#define PAGE_SIZE       (1UL << PAGE_SHIFT)
7#define PAGE_MASK       (~(PAGE_SIZE-1))
8
9#ifdef __KERNEL__
10#ifndef __ASSEMBLY__
11
12#define STRICT_MM_TYPECHECKS
13
14#define clear_page(page)	memzero((void *)(page), PAGE_SIZE)
15extern void copy_page(void *to, void *from);
16
17#define clear_user_page(page, vaddr)	clear_page(page)
18#define copy_user_page(to, from, vaddr)	copy_page(to, from)
19
20#ifdef STRICT_MM_TYPECHECKS
21/*
22 * These are used to make use of C type-checking..
23 */
24typedef struct { unsigned long pte; } pte_t;
25typedef struct { unsigned long pmd; } pmd_t;
26typedef struct { unsigned long pgd; } pgd_t;
27typedef struct { unsigned long pgprot; } pgprot_t;
28
29#define pte_val(x)      ((x).pte)
30#define pmd_val(x)      ((x).pmd)
31#define pgd_val(x)      ((x).pgd)
32#define pgprot_val(x)   ((x).pgprot)
33
34#define __pte(x)        ((pte_t) { (x) } )
35#define __pmd(x)        ((pmd_t) { (x) } )
36#define __pgd(x)        ((pgd_t) { (x) } )
37#define __pgprot(x)     ((pgprot_t) { (x) } )
38
39#else
40/*
41 * .. while these make it easier on the compiler
42 */
43typedef unsigned long pte_t;
44typedef unsigned long pmd_t;
45typedef unsigned long pgd_t;
46typedef unsigned long pgprot_t;
47
48#define pte_val(x)      (x)
49#define pmd_val(x)      (x)
50#define pgd_val(x)      (x)
51#define pgprot_val(x)   (x)
52
53#define __pte(x)        (x)
54#define __pmd(x)        (x)
55#define __pgd(x)        (x)
56#define __pgprot(x)     (x)
57
58#endif
59#endif /* !__ASSEMBLY__ */
60
61/* to align the pointer to the (next) page boundary */
62#define PAGE_ALIGN(addr)	(((addr)+PAGE_SIZE-1)&PAGE_MASK)
63
64#ifndef __ASSEMBLY__
65
66#ifdef CONFIG_DEBUG_BUGVERBOSE
67extern void __bug(const char *file, int line, void *data);
68
69/* give file/line information */
70#define BUG()		__bug(__FILE__, __LINE__, NULL)
71#define PAGE_BUG(page)	__bug(__FILE__, __LINE__, page)
72
73#else
74
75/* these just cause an oops */
76#define BUG()		(*(int *)0 = 0)
77#define PAGE_BUG(page)	(*(int *)0 = 0)
78
79#endif
80
81/* Pure 2^n version of get_order */
82static inline int get_order(unsigned long size)
83{
84	int order;
85
86	size = (size-1) >> (PAGE_SHIFT-1);
87	order = -1;
88	do {
89		size >>= 1;
90		order++;
91	} while (size);
92	return order;
93}
94
95#endif /* !__ASSEMBLY__ */
96
97#include <linux/config.h>
98#include <asm/arch/memory.h>
99
100#define __pa(x)			__virt_to_phys((unsigned long)(x))
101#define __va(x)			((void *)__phys_to_virt((unsigned long)(x)))
102
103#ifndef CONFIG_DISCONTIGMEM
104#define virt_to_page(kaddr)	(mem_map + (__pa(kaddr) >> PAGE_SHIFT) - \
105				 (PHYS_OFFSET >> PAGE_SHIFT))
106#define VALID_PAGE(page)	((page - mem_map) < max_mapnr)
107#endif
108
109#endif
110
111#endif
112