6 #include <asm/arch/page.h>
7 #include <linux/const.h>
9 /* PAGE_SHIFT determines the page size */
11 #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
12 #define PAGE_MASK (~(PAGE_SIZE-1))
14 #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
15 #define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE)
17 #define clear_user_page(page, vaddr, pg) clear_page(page)
18 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
20 #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
21 alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
22 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
25 * These are used to make use of C type-checking..
28 typedef struct { unsigned long pte; } pte_t;
29 typedef struct { unsigned long pgd; } pgd_t;
30 typedef struct { unsigned long pgprot; } pgprot_t;
33 #define pte_val(x) ((x).pte)
34 #define pgd_val(x) ((x).pgd)
35 #define pgprot_val(x) ((x).pgprot)
37 #define __pte(x) ((pte_t) { (x) } )
38 #define __pgd(x) ((pgd_t) { (x) } )
39 #define __pgprot(x) ((pgprot_t) { (x) } )
41 /* On CRIS the PFN numbers doesn't start at 0 so we have to compensate */
42 /* for that before indexing into the page table starting at mem_map */
43 #define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT)
44 #define pfn_valid(pfn) (((pfn) - (PAGE_OFFSET >> PAGE_SHIFT)) < max_mapnr)
46 /* to index into the page map. our pages all start at physical addr PAGE_OFFSET so
47 * we can let the map start there. notice that we subtract PAGE_OFFSET because
48 * we start our mem_map there - in other ports they map mem_map physically and
49 * use __pa instead. in our system both the physical and virtual address of DRAM
50 * is too high to let mem_map start at 0, so we do it this way instead (similar
51 * to arm and m68k I think)
54 #define virt_to_page(kaddr) (mem_map + (((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT))
55 #define VALID_PAGE(page) (((page) - mem_map) < max_mapnr)
56 #define virt_addr_valid(kaddr) pfn_valid((unsigned)(kaddr) >> PAGE_SHIFT)
58 /* convert a page (based on mem_map and forward) to a physical address
59 * do this by figuring out the virtual address and then use __pa
62 #define page_to_phys(page) __pa((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
64 /* to align the pointer to the (next) page boundary */
65 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
69 #endif /* __ASSEMBLY__ */
71 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
72 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
74 #include <asm-generic/memory_model.h>
75 #include <asm-generic/page.h>
77 #endif /* __KERNEL__ */
79 #endif /* _CRIS_PAGE_H */