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