#ifndef _CRIS_PAGE_H #define _CRIS_PAGE_H #include <linux/config.h> #include <asm/arch/page.h> /* PAGE_SHIFT determines the page size */ #define PAGE_SHIFT 13 #ifndef __ASSEMBLY__ #define PAGE_SIZE (1UL << PAGE_SHIFT) #else #define PAGE_SIZE (1 << PAGE_SHIFT) #endif #define PAGE_MASK (~(PAGE_SIZE-1)) #ifdef __KERNEL__ #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(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, 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 pfn_to_page(pfn) (mem_map + ((pfn) - (PAGE_OFFSET >> PAGE_SHIFT))) #define page_to_pfn(page) ((unsigned long)((page) - mem_map) + (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) #endif /* __KERNEL__ */ #include <asm-generic/page.h> #endif /* _CRIS_PAGE_H */