1#ifndef _BLACKFIN_PAGE_H
2#define _BLACKFIN_PAGE_H
3
4/* PAGE_SHIFT determines the page size */
5
6#define PAGE_SHIFT	12
7#define PAGE_SIZE	(1UL << PAGE_SHIFT)
8#define PAGE_MASK	(~(PAGE_SIZE-1))
9
10#ifdef __KERNEL__
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/*
26 * These are used to make use of C type-checking..
27 */
28typedef struct {
29	unsigned long pte;
30} pte_t;
31typedef struct {
32	unsigned long pmd[16];
33} pmd_t;
34typedef struct {
35	unsigned long pgd;
36} pgd_t;
37typedef struct {
38	unsigned long pgprot;
39} pgprot_t;
40
41#define pte_val(x)	((x).pte)
42#define pmd_val(x)	((&x)->pmd[0])
43#define pgd_val(x)	((x).pgd)
44#define pgprot_val(x)	((x).pgprot)
45
46#define __pte(x)	((pte_t) { (x) } )
47#define __pmd(x)	((pmd_t) { (x) } )
48#define __pgd(x)	((pgd_t) { (x) } )
49#define __pgprot(x)	((pgprot_t) { (x) } )
50
51/* to align the pointer to the (next) page boundary */
52#define PAGE_ALIGN(addr)	(((addr)+PAGE_SIZE-1)&PAGE_MASK)
53
54extern unsigned long memory_start;
55extern unsigned long memory_end;
56
57#endif				/* !__ASSEMBLY__ */
58
59#include <asm/page_offset.h>
60#include <asm/io.h>
61
62#define PAGE_OFFSET		(PAGE_OFFSET_RAW)
63
64#ifndef __ASSEMBLY__
65
66#define __pa(vaddr)		virt_to_phys((void *)(vaddr))
67#define __va(paddr)		phys_to_virt((unsigned long)(paddr))
68
69#define MAP_NR(addr)		(((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT)
70
71#define virt_to_pfn(kaddr)	(__pa(kaddr) >> PAGE_SHIFT)
72#define pfn_to_virt(pfn)	__va((pfn) << PAGE_SHIFT)
73#define virt_to_page(addr)	(mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
74#define page_to_virt(page)	((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
75#define VALID_PAGE(page)	((page - mem_map) < max_mapnr)
76
77#define pfn_to_page(pfn)	virt_to_page(pfn_to_virt(pfn))
78#define page_to_pfn(page)	virt_to_pfn(page_to_virt(page))
79#define pfn_valid(pfn)	        ((pfn) < max_mapnr)
80
81#define	virt_addr_valid(kaddr)	(((void *)(kaddr) >= (void *)PAGE_OFFSET) && \
82				((void *)(kaddr) < (void *)memory_end))
83
84#include <asm-generic/page.h>
85
86#endif				/* __ASSEMBLY__ */
87#endif				/* __KERNEL__ */
88
89#endif				/* _BLACKFIN_PAGE_H */
90