1#ifndef _BLACKFIN_PAGE_H 2#define _BLACKFIN_PAGE_H 3 4/* PAGE_SHIFT determines the page size */ 5 6#define PAGE_SHIFT 12 7#define PAGE_SIZE (1UL << PAGE_SHIFT) 8#define PAGE_MASK (~(PAGE_SIZE-1)) 9 10#ifdef __KERNEL__ 11 12#include <asm/setup.h> 13 14#ifndef __ASSEMBLY__ 15 16#define get_user_page(vaddr) __get_free_page(GFP_KERNEL) 17#define free_user_page(page, addr) free_page(addr) 18 19#define clear_page(page) memset((page), 0, PAGE_SIZE) 20#define copy_page(to,from) memcpy((to), (from), PAGE_SIZE) 21 22#define clear_user_page(page, vaddr,pg) clear_page(page) 23#define copy_user_page(to, from, vaddr,pg) copy_page(to, from) 24 25/* 26 * These are used to make use of C type-checking.. 27 */ 28typedef struct { 29 unsigned long pte; 30} pte_t; 31typedef struct { 32 unsigned long pmd[16]; 33} pmd_t; 34typedef struct { 35 unsigned long pgd; 36} pgd_t; 37typedef struct { 38 unsigned long pgprot; 39} pgprot_t; 40 41#define pte_val(x) ((x).pte) 42#define pmd_val(x) ((&x)->pmd[0]) 43#define pgd_val(x) ((x).pgd) 44#define pgprot_val(x) ((x).pgprot) 45 46#define __pte(x) ((pte_t) { (x) } ) 47#define __pmd(x) ((pmd_t) { (x) } ) 48#define __pgd(x) ((pgd_t) { (x) } ) 49#define __pgprot(x) ((pgprot_t) { (x) } ) 50 51/* to align the pointer to the (next) page boundary */ 52#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) 53 54extern unsigned long memory_start; 55extern unsigned long memory_end; 56 57#endif /* !__ASSEMBLY__ */ 58 59#include <asm/page_offset.h> 60#include <asm/io.h> 61 62#define PAGE_OFFSET (PAGE_OFFSET_RAW) 63 64#ifndef __ASSEMBLY__ 65 66#define __pa(vaddr) virt_to_phys((void *)(vaddr)) 67#define __va(paddr) phys_to_virt((unsigned long)(paddr)) 68 69#define MAP_NR(addr) (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT) 70 71#define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) 72#define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT) 73#define virt_to_page(addr) (mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT)) 74#define page_to_virt(page) ((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET) 75#define VALID_PAGE(page) ((page - mem_map) < max_mapnr) 76 77#define pfn_to_page(pfn) virt_to_page(pfn_to_virt(pfn)) 78#define page_to_pfn(page) virt_to_pfn(page_to_virt(page)) 79#define pfn_valid(pfn) ((pfn) < max_mapnr) 80 81#define virt_addr_valid(kaddr) (((void *)(kaddr) >= (void *)PAGE_OFFSET) && \ 82 ((void *)(kaddr) < (void *)memory_end)) 83 84#include <asm-generic/page.h> 85 86#endif /* __ASSEMBLY__ */ 87#endif /* __KERNEL__ */ 88 89#endif /* _BLACKFIN_PAGE_H */ 90