1#ifndef _ASM_PAGE_H
 2#define _ASM_PAGE_H
 3
 4#include <asm/virtconvert.h>
 5#include <asm/mem-layout.h>
 6#include <asm/sections.h>
 7#include <asm/setup.h>
 8
 9#ifndef __ASSEMBLY__
10
11#define clear_page(pgaddr)			memset((pgaddr), 0, PAGE_SIZE)
12#define copy_page(to,from)			memcpy((to), (from), PAGE_SIZE)
13
14#define clear_user_page(pgaddr, vaddr, page)	memset((pgaddr), 0, PAGE_SIZE)
15#define copy_user_page(vto, vfrom, vaddr, topg)	memcpy((vto), (vfrom), PAGE_SIZE)
16
17/*
18 * These are used to make use of C type-checking..
19 */
20typedef struct { unsigned long	pte;	} pte_t;
21typedef struct { unsigned long	ste[64];} pmd_t;
22typedef struct { pmd_t		pue[1]; } pud_t;
23typedef struct { pud_t		pge[1];	} pgd_t;
24typedef struct { unsigned long	pgprot;	} pgprot_t;
25typedef struct page *pgtable_t;
26
27#define pte_val(x)	((x).pte)
28#define pmd_val(x)	((x).ste[0])
29#define pud_val(x)	((x).pue[0])
30#define pgd_val(x)	((x).pge[0])
31#define pgprot_val(x)	((x).pgprot)
32
33#define __pte(x)	((pte_t) { (x) } )
34#define __pmd(x)	((pmd_t) { { (x) } } )
35#define __pud(x)	((pud_t) { (x) } )
36#define __pgd(x)	((pgd_t) { (x) } )
37#define __pgprot(x)	((pgprot_t) { (x) } )
38#define PTE_MASK	PAGE_MASK
39
40#define devmem_is_allowed(pfn)	1
41
42#define __pa(vaddr)		virt_to_phys((void *) (unsigned long) (vaddr))
43#define __va(paddr)		phys_to_virt((unsigned long) (paddr))
44
45#define pfn_to_kaddr(pfn)	__va((pfn) << PAGE_SHIFT)
46
47extern unsigned long max_low_pfn;
48extern unsigned long min_low_pfn;
49extern unsigned long max_pfn;
50
51#ifdef CONFIG_MMU
52#define pfn_valid(pfn)		((pfn) < max_mapnr)
53#else
54#define ARCH_PFN_OFFSET		(PAGE_OFFSET >> PAGE_SHIFT)
55#define pfn_valid(pfn)		((pfn) >= min_low_pfn && (pfn) < max_low_pfn)
56
57#endif
58
59#define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
60#define virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
61
62
63#define VM_DATA_DEFAULT_FLAGS \
64	(VM_READ | VM_WRITE | \
65	((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
66		 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
67
68#endif /* __ASSEMBLY__ */
69
70#include <asm-generic/memory_model.h>
71#include <asm-generic/getorder.h>
72
73#endif /* _ASM_PAGE_H */