1#ifndef _CRIS_PAGE_H
2#define _CRIS_PAGE_H
3
4#ifdef __KERNEL__
5
6#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
17#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;
31typedef struct { unsigned long pgd; } pgd_t;
32typedef struct { unsigned long pgprot; } pgprot_t;
33#endif
34
35#define pte_val(x)	((x).pte)
36#define pgd_val(x)	((x).pgd)
37#define pgprot_val(x)	((x).pgprot)
38
39#define __pte(x)	((pte_t) { (x) } )
40#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    */
45#define ARCH_PFN_OFFSET		(PAGE_OFFSET >> PAGE_SHIFT)
46#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
71#endif /* __ASSEMBLY__ */
72
73#define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
74				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
75
76#include <asm-generic/memory_model.h>
77#include <asm-generic/page.h>
78
79#endif /* __KERNEL__ */
80
81#endif /* _CRIS_PAGE_H */
82