1#ifndef _M68KNOMMU_PAGE_H
2#define _M68KNOMMU_PAGE_H
3
4#ifdef __KERNEL__
5
6/* PAGE_SHIFT determines the page size */
7
8#define PAGE_SHIFT	(12)
9#define PAGE_SIZE	(1UL << PAGE_SHIFT)
10#define PAGE_MASK	(~(PAGE_SIZE-1))
11
12#include <asm/setup.h>
13
14#ifndef __ASSEMBLY__
15
16#define get_user_page(vaddr)		__get_free_page(GFP_KERNEL)
17#define free_user_page(page, addr)	free_page(addr)
18
19#define clear_page(page)	memset((page), 0, PAGE_SIZE)
20#define copy_page(to,from)	memcpy((to), (from), PAGE_SIZE)
21
22#define clear_user_page(page, vaddr, pg)	clear_page(page)
23#define copy_user_page(to, from, vaddr, pg)	copy_page(to, from)
24
25#define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr)
26#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
27
28/*
29 * These are used to make use of C type-checking..
30 */
31typedef struct { unsigned long pte; } pte_t;
32typedef struct { unsigned long pmd[16]; } pmd_t;
33typedef struct { unsigned long pgd; } pgd_t;
34typedef struct { unsigned long pgprot; } pgprot_t;
35
36#define pte_val(x)	((x).pte)
37#define pmd_val(x)	((&x)->pmd[0])
38#define pgd_val(x)	((x).pgd)
39#define pgprot_val(x)	((x).pgprot)
40
41#define __pte(x)	((pte_t) { (x) } )
42#define __pmd(x)	((pmd_t) { (x) } )
43#define __pgd(x)	((pgd_t) { (x) } )
44#define __pgprot(x)	((pgprot_t) { (x) } )
45
46/* to align the pointer to the (next) page boundary */
47#define PAGE_ALIGN(addr)	(((addr)+PAGE_SIZE-1)&PAGE_MASK)
48
49extern unsigned long memory_start;
50extern unsigned long memory_end;
51
52#endif /* !__ASSEMBLY__ */
53
54#include <asm/page_offset.h>
55
56#define PAGE_OFFSET		(PAGE_OFFSET_RAW)
57
58#ifndef __ASSEMBLY__
59
60#define __pa(vaddr)		virt_to_phys((void *)(vaddr))
61#define __va(paddr)		phys_to_virt((unsigned long)(paddr))
62
63#define virt_to_pfn(kaddr)	(__pa(kaddr) >> PAGE_SHIFT)
64#define pfn_to_virt(pfn)	__va((pfn) << PAGE_SHIFT)
65
66#define virt_to_page(addr)	(mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
67#define page_to_virt(page)	((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
68
69#define pfn_to_page(pfn)	virt_to_page(pfn_to_virt(pfn))
70#define page_to_pfn(page)	virt_to_pfn(page_to_virt(page))
71#define pfn_valid(pfn)	        ((pfn) < max_mapnr)
72
73#define	virt_addr_valid(kaddr)	(((void *)(kaddr) >= (void *)PAGE_OFFSET) && \
74				((void *)(kaddr) < (void *)memory_end))
75
76#endif /* __ASSEMBLY__ */
77
78#include <asm-generic/page.h>
79
80#endif /* __KERNEL__ */
81
82#endif /* _M68KNOMMU_PAGE_H */
83