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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef _ASMARM_PAGE_H
2#define _ASMARM_PAGE_H
3
4
5#ifdef __KERNEL__
6#ifndef __ASSEMBLY__
7
8extern void __clear_user_page(void *p, unsigned long user);
9extern void __copy_user_page(void *to, const void *from, unsigned long user);
10extern void copy_page(void *to, const void *from);
11
12//FIXME these may be wrong on ARM26
13#define clear_user_page(addr,vaddr,pg) \
14 do { \
15 preempt_disable(); \
16 __clear_user_page(addr, vaddr); \
17 preempt_enable(); \
18 } while (0)
19
20#define copy_user_page(to,from,vaddr,pg) \
21 do { \
22 preempt_disable(); \
23 __copy_user_page(to, from, vaddr); \
24 preempt_enable(); \
25 } while (0)
26
27#define clear_page(page) memzero((void *)(page), PAGE_SIZE)
28#define copy_page(to, from) __copy_user_page(to, from, 0);
29
30#undef STRICT_MM_TYPECHECKS
31
32#ifdef STRICT_MM_TYPECHECKS
33/*
34 * These are used to make use of C type-checking..
35 */
36typedef struct { unsigned long pgd; } pgd_t;
37typedef struct { unsigned long pte; } pte_t;
38typedef struct { unsigned long pmd; } pmd_t;
39typedef struct { unsigned long pgprot; } pgprot_t;
40
41#define pgd_val(x) ((x).pgd)
42#define pte_val(x) ((x).pte)
43#define pmd_val(x) ((x).pmd)
44#define pgprot_val(x) ((x).pgprot)
45
46#define __pte(x) ((pte_t) { (x) } )
47#define __pmd(x) ((pmd_t) { (x) } )
48#define __pgprot(x) ((pgprot_t) { (x) } )
49
50#else
51/*
52 * .. while these make it easier on the compiler
53 */
54typedef unsigned long pgd_t;
55typedef unsigned long pte_t;
56typedef unsigned long pmd_t;
57typedef unsigned long pgprot_t;
58
59//FIXME - should these cast to unsigned long?
60#define pgd_val(x) (x)
61#define pte_val(x) (x)
62#define pmd_val(x) (x)
63#define pgprot_val(x) (x)
64
65#define __pte(x) (x)
66#define __pmd(x) (x)
67#define __pgprot(x) (x)
68
69#endif /* STRICT_MM_TYPECHECKS */
70#endif /* !__ASSEMBLY__ */
71#endif /* __KERNEL__ */
72
73/* PAGE_SHIFT determines the page size. This is configurable. */
74#if defined(CONFIG_PAGESIZE_16)
75#define PAGE_SHIFT 14 /* 16K */
76#else /* default */
77#define PAGE_SHIFT 15 /* 32K */
78#endif
79
80#define EXEC_PAGESIZE 32768
81
82#define PAGE_SIZE (1UL << PAGE_SHIFT)
83#define PAGE_MASK (~(PAGE_SIZE-1))
84
85/* to align the pointer to the (next) page boundary */
86#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
87
88#ifdef __KERNEL__
89#ifndef __ASSEMBLY__
90
91#include <asm/memory.h>
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#include <asm-generic/page.h>
101
102#endif