1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _CRIS_PAGE_H 3 #define _CRIS_PAGE_H 4 5 #include <arch/page.h> 6 #include <linux/const.h> 7 8 /* PAGE_SHIFT determines the page size */ 9 #define PAGE_SHIFT 13 10 #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) 11 #define PAGE_MASK (~(PAGE_SIZE-1)) 12 13 #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) 14 #define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE) 15 16 #define clear_user_page(page, vaddr, pg) clear_page(page) 17 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) 18 19 #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \ 20 alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr) 21 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE 22 23 /* 24 * These are used to make use of C type-checking.. 25 */ 26 #ifndef __ASSEMBLY__ 27 typedef struct { unsigned long pte; } pte_t; 28 typedef struct { unsigned long pgd; } pgd_t; 29 typedef struct { unsigned long pgprot; } pgprot_t; 30 typedef struct page *pgtable_t; 31 #endif 32 33 #define pte_val(x) ((x).pte) 34 #define pgd_val(x) ((x).pgd) 35 #define pgprot_val(x) ((x).pgprot) 36 37 #define __pte(x) ((pte_t) { (x) } ) 38 #define __pgd(x) ((pgd_t) { (x) } ) 39 #define __pgprot(x) ((pgprot_t) { (x) } ) 40 41 /* On CRIS the PFN numbers doesn't start at 0 so we have to compensate */ 42 /* for that before indexing into the page table starting at mem_map */ 43 #define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT) 44 #define pfn_valid(pfn) (((pfn) - (PAGE_OFFSET >> PAGE_SHIFT)) < max_mapnr) 45 46 /* to index into the page map. our pages all start at physical addr PAGE_OFFSET so 47 * we can let the map start there. notice that we subtract PAGE_OFFSET because 48 * we start our mem_map there - in other ports they map mem_map physically and 49 * use __pa instead. in our system both the physical and virtual address of DRAM 50 * is too high to let mem_map start at 0, so we do it this way instead (similar 51 * to arm and m68k I think) 52 */ 53 54 #define virt_to_page(kaddr) (mem_map + (((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT)) 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 75