4 #include <linux/config.h>
5 #include <asm/arch/page.h>
7 /* PAGE_SHIFT determines the page size */
10 #define PAGE_SIZE (1UL << PAGE_SHIFT)
12 #define PAGE_SIZE (1 << PAGE_SHIFT)
14 #define PAGE_MASK (~(PAGE_SIZE-1))
18 #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
19 #define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE)
21 #define clear_user_page(page, vaddr, pg) clear_page(page)
22 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
24 #define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr)
25 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
28 * These are used to make use of C type-checking..
31 typedef struct { unsigned long pte
; } pte_t
;
32 typedef struct { unsigned long pgd
; } pgd_t
;
33 typedef struct { unsigned long pgprot
; } pgprot_t
;
36 #define pte_val(x) ((x).pte)
37 #define pgd_val(x) ((x).pgd)
38 #define pgprot_val(x) ((x).pgprot)
40 #define __pte(x) ((pte_t) { (x) } )
41 #define __pgd(x) ((pgd_t) { (x) } )
42 #define __pgprot(x) ((pgprot_t) { (x) } )
44 /* On CRIS the PFN numbers doesn't start at 0 so we have to compensate */
45 /* for that before indexing into the page table starting at mem_map */
46 #define pfn_to_page(pfn) (mem_map + ((pfn) - (PAGE_OFFSET >> PAGE_SHIFT)))
47 #define page_to_pfn(page) ((unsigned long)((page) - mem_map) + (PAGE_OFFSET >> PAGE_SHIFT))
48 #define pfn_valid(pfn) (((pfn) - (PAGE_OFFSET >> PAGE_SHIFT)) < max_mapnr)
50 /* to index into the page map. our pages all start at physical addr PAGE_OFFSET so
51 * we can let the map start there. notice that we subtract PAGE_OFFSET because
52 * we start our mem_map there - in other ports they map mem_map physically and
53 * use __pa instead. in our system both the physical and virtual address of DRAM
54 * is too high to let mem_map start at 0, so we do it this way instead (similar
55 * to arm and m68k I think)
58 #define virt_to_page(kaddr) (mem_map + (((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT))
59 #define VALID_PAGE(page) (((page) - mem_map) < max_mapnr)
60 #define virt_addr_valid(kaddr) pfn_valid((unsigned)(kaddr) >> PAGE_SHIFT)
62 /* convert a page (based on mem_map and forward) to a physical address
63 * do this by figuring out the virtual address and then use __pa
66 #define page_to_phys(page) __pa((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
68 /* to align the pointer to the (next) page boundary */
69 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
73 /* Pure 2^n version of get_order */
74 static inline int get_order(unsigned long size
)
78 size
= (size
-1) >> (PAGE_SHIFT
-1);
86 #endif /* __ASSEMBLY__ */
88 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
89 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
91 #endif /* __KERNEL__ */
93 #endif /* _CRIS_PAGE_H */