1#ifndef _CRIS_PAGE_H 2#define _CRIS_PAGE_H 3 4#include <arch/page.h> 5#include <linux/const.h> 6 7/* PAGE_SHIFT determines the page size */ 8#define PAGE_SHIFT 13 9#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) 10#define PAGE_MASK (~(PAGE_SIZE-1)) 11 12#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) 13#define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE) 14 15#define clear_user_page(page, vaddr, pg) clear_page(page) 16#define copy_user_page(to, from, vaddr, pg) copy_page(to, from) 17 18#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \ 19 alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr) 20#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE 21 22/* 23 * These are used to make use of C type-checking.. 24 */ 25#ifndef __ASSEMBLY__ 26typedef struct { unsigned long pte; } pte_t; 27typedef struct { unsigned long pgd; } pgd_t; 28typedef struct { unsigned long pgprot; } pgprot_t; 29typedef struct page *pgtable_t; 30#endif 31 32#define pte_val(x) ((x).pte) 33#define pgd_val(x) ((x).pgd) 34#define pgprot_val(x) ((x).pgprot) 35 36#define __pte(x) ((pte_t) { (x) } ) 37#define __pgd(x) ((pgd_t) { (x) } ) 38#define __pgprot(x) ((pgprot_t) { (x) } ) 39 40/* On CRIS the PFN numbers doesn't start at 0 so we have to compensate */ 41/* for that before indexing into the page table starting at mem_map */ 42#define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT) 43#define pfn_valid(pfn) (((pfn) - (PAGE_OFFSET >> PAGE_SHIFT)) < max_mapnr) 44 45/* to index into the page map. our pages all start at physical addr PAGE_OFFSET so 46 * we can let the map start there. notice that we subtract PAGE_OFFSET because 47 * we start our mem_map there - in other ports they map mem_map physically and 48 * use __pa instead. in our system both the physical and virtual address of DRAM 49 * is too high to let mem_map start at 0, so we do it this way instead (similar 50 * to arm and m68k I think) 51 */ 52 53#define virt_to_page(kaddr) (mem_map + (((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT)) 54#define VALID_PAGE(page) (((page) - mem_map) < max_mapnr) 55#define virt_addr_valid(kaddr) pfn_valid((unsigned)(kaddr) >> PAGE_SHIFT) 56 57/* convert a page (based on mem_map and forward) to a physical address 58 * do this by figuring out the virtual address and then use __pa 59 */ 60 61#define page_to_phys(page) __pa((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET) 62 63#ifndef __ASSEMBLY__ 64 65#endif /* __ASSEMBLY__ */ 66 67#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ 68 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) 69 70#include <asm-generic/memory_model.h> 71#include <asm-generic/getorder.h> 72 73#endif /* _CRIS_PAGE_H */ 74