blob: 9f13c32552bfb1eab23969ab0141fe85e22ac50d [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _CRIS_PAGE_H
2#define _CRIS_PAGE_H
3
David Woodhouseed9526b2006-09-21 09:33:55 +01004#ifdef __KERNEL__
5
Linus Torvalds1da177e2005-04-16 15:20:36 -07006#include <asm/arch/page.h>
7
8/* PAGE_SHIFT determines the page size */
9#define PAGE_SHIFT 13
10#ifndef __ASSEMBLY__
11#define PAGE_SIZE (1UL << PAGE_SHIFT)
12#else
13#define PAGE_SIZE (1 << PAGE_SHIFT)
14#endif
15#define PAGE_MASK (~(PAGE_SIZE-1))
16
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
18#define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE)
19
20#define clear_user_page(page, vaddr, pg) clear_page(page)
21#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
22
23#define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr)
24#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
25
26/*
27 * These are used to make use of C type-checking..
28 */
29#ifndef __ASSEMBLY__
30typedef struct { unsigned long pte; } pte_t;
Linus Torvalds1da177e2005-04-16 15:20:36 -070031typedef struct { unsigned long pgd; } pgd_t;
32typedef struct { unsigned long pgprot; } pgprot_t;
33#endif
34
35#define pte_val(x) ((x).pte)
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#define pgd_val(x) ((x).pgd)
37#define pgprot_val(x) ((x).pgprot)
38
39#define __pte(x) ((pte_t) { (x) } )
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#define __pgd(x) ((pgd_t) { (x) } )
41#define __pgprot(x) ((pgprot_t) { (x) } )
42
43/* On CRIS the PFN numbers doesn't start at 0 so we have to compensate */
44/* for that before indexing into the page table starting at mem_map */
KAMEZAWA Hiroyukibb872f72006-03-27 01:15:39 -080045#define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT)
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#define pfn_valid(pfn) (((pfn) - (PAGE_OFFSET >> PAGE_SHIFT)) < max_mapnr)
47
48/* to index into the page map. our pages all start at physical addr PAGE_OFFSET so
49 * we can let the map start there. notice that we subtract PAGE_OFFSET because
50 * we start our mem_map there - in other ports they map mem_map physically and
51 * use __pa instead. in our system both the physical and virtual address of DRAM
52 * is too high to let mem_map start at 0, so we do it this way instead (similar
53 * to arm and m68k I think)
54 */
55
56#define virt_to_page(kaddr) (mem_map + (((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT))
57#define VALID_PAGE(page) (((page) - mem_map) < max_mapnr)
58#define virt_addr_valid(kaddr) pfn_valid((unsigned)(kaddr) >> PAGE_SHIFT)
59
60/* convert a page (based on mem_map and forward) to a physical address
61 * do this by figuring out the virtual address and then use __pa
62 */
63
64#define page_to_phys(page) __pa((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
65
66/* to align the pointer to the (next) page boundary */
67#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
68
69#ifndef __ASSEMBLY__
70
Linus Torvalds1da177e2005-04-16 15:20:36 -070071#endif /* __ASSEMBLY__ */
72
73#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
74 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
75
KAMEZAWA Hiroyukibb872f72006-03-27 01:15:39 -080076#include <asm-generic/memory_model.h>
Stephen Rothwellfd4fd5a2005-09-03 15:54:30 -070077#include <asm-generic/page.h>
78
David Woodhouseed9526b2006-09-21 09:33:55 +010079#endif /* __KERNEL__ */
80
Linus Torvalds1da177e2005-04-16 15:20:36 -070081#endif /* _CRIS_PAGE_H */
82