Viewing file:  page.h (2.66 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
#ifndef _CRIS_PAGE_H
#define _CRIS_PAGE_H
#ifdef __KERNEL__
#include <asm/arch/page.h>
#include <linux/const.h>
/* PAGE_SHIFT determines the page size */
#define PAGE_SHIFT 13
#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
#define PAGE_MASK (~(PAGE_SIZE-1))
#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
#define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE)
#define clear_user_page(page, vaddr, pg) clear_page(page)
#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
/*
* These are used to make use of C type-checking..
*/
#ifndef __ASSEMBLY__
typedef struct { unsigned long pte; } pte_t;
typedef struct { unsigned long pgd; } pgd_t;
typedef struct { unsigned long pgprot; } pgprot_t;
#endif
#define pte_val(x) ((x).pte)
#define pgd_val(x) ((x).pgd)
#define pgprot_val(x) ((x).pgprot)
#define __pte(x) ((pte_t) { (x) } )
#define __pgd(x) ((pgd_t) { (x) } )
#define __pgprot(x) ((pgprot_t) { (x) } )
/* On CRIS the PFN numbers doesn't start at 0 so we have to compensate */
/* for that before indexing into the page table starting at mem_map */
#define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT)
#define pfn_valid(pfn) (((pfn) - (PAGE_OFFSET >> PAGE_SHIFT)) < max_mapnr)
/* to index into the page map. our pages all start at physical addr PAGE_OFFSET so
* we can let the map start there. notice that we subtract PAGE_OFFSET because
* we start our mem_map there - in other ports they map mem_map physically and
* use __pa instead. in our system both the physical and virtual address of DRAM
* is too high to let mem_map start at 0, so we do it this way instead (similar
* to arm and m68k I think)
*/
#define virt_to_page(kaddr) (mem_map + (((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT))
#define VALID_PAGE(page) (((page) - mem_map) < max_mapnr)
#define virt_addr_valid(kaddr) pfn_valid((unsigned)(kaddr) >> PAGE_SHIFT)
/* convert a page (based on mem_map and forward) to a physical address
* do this by figuring out the virtual address and then use __pa
*/
#define page_to_phys(page) __pa((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
/* to align the pointer to the (next) page boundary */
#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
#ifndef __ASSEMBLY__
#endif /* __ASSEMBLY__ */
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
#include <asm-generic/memory_model.h>
#include <asm-generic/page.h>
#endif /* __KERNEL__ */
#endif /* _CRIS_PAGE_H */
|