1/*
 2 * linux/arch/unicore32/include/asm/page.h
 3 *
 4 * Code specific to PKUnity SoC and UniCore ISA
 5 *
 6 * Copyright (C) 2001-2010 GUAN Xue-tao
 7 *
 8 * This program is free software; you can redistribute it and/or modify
 9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12#ifndef __UNICORE_PAGE_H__
13#define __UNICORE_PAGE_H__
14
15/* PAGE_SHIFT determines the page size */
16#define PAGE_SHIFT		12
17#define PAGE_SIZE		(_AC(1, UL) << PAGE_SHIFT)
18#define PAGE_MASK		(~(PAGE_SIZE-1))
19
20#ifndef __ASSEMBLY__
21
22struct page;
23struct vm_area_struct;
24
25#define clear_page(page)	memset((void *)(page), 0, PAGE_SIZE)
26extern void copy_page(void *to, const void *from);
27
28#define clear_user_page(page, vaddr, pg)	clear_page(page)
29#define copy_user_page(to, from, vaddr, pg)	copy_page(to, from)
30
31#undef STRICT_MM_TYPECHECKS
32
33#ifdef STRICT_MM_TYPECHECKS
34/*
35 * These are used to make use of C type-checking..
36 */
37typedef struct { unsigned long pte; } pte_t;
38typedef struct { unsigned long pgd; } pgd_t;
39typedef struct { unsigned long pgprot; } pgprot_t;
40
41#define pte_val(x)      ((x).pte)
42#define pgd_val(x)	((x).pgd)
43#define pgprot_val(x)   ((x).pgprot)
44
45#define __pte(x)        ((pte_t) { (x) })
46#define __pgd(x)	((pgd_t) { (x) })
47#define __pgprot(x)     ((pgprot_t) { (x) })
48
49#else
50/*
51 * .. while these make it easier on the compiler
52 */
53typedef unsigned long pte_t;
54typedef unsigned long pgd_t;
55typedef unsigned long pgprot_t;
56
57#define pte_val(x)      (x)
58#define pgd_val(x)      (x)
59#define pgprot_val(x)   (x)
60
61#define __pte(x)        (x)
62#define __pgd(x)	(x)
63#define __pgprot(x)     (x)
64
65#endif /* STRICT_MM_TYPECHECKS */
66
67typedef struct page *pgtable_t;
68
69extern int pfn_valid(unsigned long);
70
71#include <asm/memory.h>
72
73#endif /* !__ASSEMBLY__ */
74
75#define VM_DATA_DEFAULT_FLAGS \
76	(VM_READ | VM_WRITE | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
77
78#include <asm-generic/getorder.h>
79
80#endif