1#ifndef _ALPHA_PAGE_H
2#define _ALPHA_PAGE_H
3
4#include <linux/const.h>
5#include <asm/pal.h>
6
7/* PAGE_SHIFT determines the page size */
8#define PAGE_SHIFT	13
9#define PAGE_SIZE	(_AC(1,UL) << PAGE_SHIFT)
10#define PAGE_MASK	(~(PAGE_SIZE-1))
11
12#ifndef __ASSEMBLY__
13
14#define STRICT_MM_TYPECHECKS
15
16extern void clear_page(void *page);
17#define clear_user_page(page, vaddr, pg)	clear_page(page)
18
19#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
20	alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vmaddr)
21#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
22
23extern void copy_page(void * _to, void * _from);
24#define copy_user_page(to, from, vaddr, pg)	copy_page(to, from)
25
26#ifdef STRICT_MM_TYPECHECKS
27/*
28 * These are used to make use of C type-checking..
29 */
30typedef struct { unsigned long pte; } pte_t;
31typedef struct { unsigned long pmd; } pmd_t;
32typedef struct { unsigned long pgd; } pgd_t;
33typedef struct { unsigned long pgprot; } pgprot_t;
34
35#define pte_val(x)	((x).pte)
36#define pmd_val(x)	((x).pmd)
37#define pgd_val(x)	((x).pgd)
38#define pgprot_val(x)	((x).pgprot)
39
40#define __pte(x)	((pte_t) { (x) } )
41#define __pmd(x)	((pmd_t) { (x) } )
42#define __pgd(x)	((pgd_t) { (x) } )
43#define __pgprot(x)	((pgprot_t) { (x) } )
44
45#else
46/*
47 * .. while these make it easier on the compiler
48 */
49typedef unsigned long pte_t;
50typedef unsigned long pmd_t;
51typedef unsigned long pgd_t;
52typedef unsigned long pgprot_t;
53
54#define pte_val(x)	(x)
55#define pmd_val(x)	(x)
56#define pgd_val(x)	(x)
57#define pgprot_val(x)	(x)
58
59#define __pte(x)	(x)
60#define __pgd(x)	(x)
61#define __pgprot(x)	(x)
62
63#endif /* STRICT_MM_TYPECHECKS */
64
65typedef struct page *pgtable_t;
66
67#ifdef USE_48_BIT_KSEG
68#define PAGE_OFFSET		0xffff800000000000UL
69#else
70#define PAGE_OFFSET		0xfffffc0000000000UL
71#endif
72
73#else
74
75#ifdef USE_48_BIT_KSEG
76#define PAGE_OFFSET		0xffff800000000000
77#else
78#define PAGE_OFFSET		0xfffffc0000000000
79#endif
80
81#endif /* !__ASSEMBLY__ */
82
83#define __pa(x)			((unsigned long) (x) - PAGE_OFFSET)
84#define __va(x)			((void *)((unsigned long) (x) + PAGE_OFFSET))
85#ifndef CONFIG_DISCONTIGMEM
86#define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
87
88#define pfn_valid(pfn)		((pfn) < max_mapnr)
89#define virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
90#endif /* CONFIG_DISCONTIGMEM */
91
92#define VM_DATA_DEFAULT_FLAGS		(VM_READ | VM_WRITE | VM_EXEC | \
93					 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
94
95#include <asm-generic/memory_model.h>
96#include <asm-generic/getorder.h>
97
98#endif /* _ALPHA_PAGE_H */
99