1 #ifndef _ASM_M32R_PAGE_H 2 #define _ASM_M32R_PAGE_H 3 4 #include <linux/const.h> 5 6 /* PAGE_SHIFT determines the page size */ 7 #define PAGE_SHIFT 12 8 #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) 9 #define PAGE_MASK (~(PAGE_SIZE-1)) 10 11 #ifndef __ASSEMBLY__ 12 13 extern void clear_page(void *to); 14 extern void copy_page(void *to, void *from); 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 typedef struct { unsigned long pte; } pte_t; 27 typedef struct { unsigned long pmd; } pmd_t; 28 typedef struct { unsigned long pgd; } pgd_t; 29 #define pte_val(x) ((x).pte) 30 #define PTE_MASK PAGE_MASK 31 32 typedef struct { unsigned long pgprot; } pgprot_t; 33 typedef struct page *pgtable_t; 34 35 #define pmd_val(x) ((x).pmd) 36 #define pgd_val(x) ((x).pgd) 37 #define pgprot_val(x) ((x).pgprot) 38 39 #define __pte(x) ((pte_t) { (x) } ) 40 #define __pmd(x) ((pmd_t) { (x) } ) 41 #define __pgd(x) ((pgd_t) { (x) } ) 42 #define __pgprot(x) ((pgprot_t) { (x) } ) 43 44 #endif /* !__ASSEMBLY__ */ 45 46 /* 47 * This handles the memory map.. We could make this a config 48 * option, but too many people screw it up, and too few need 49 * it. 50 * 51 * A __PAGE_OFFSET of 0xC0000000 means that the kernel has 52 * a virtual address space of one gigabyte, which limits the 53 * amount of physical memory you can use to about 950MB. 54 * 55 * If you want more physical memory than this then see the CONFIG_HIGHMEM4G 56 * and CONFIG_HIGHMEM64G options in the kernel configuration. 57 */ 58 59 #define __MEMORY_START CONFIG_MEMORY_START 60 #define __MEMORY_SIZE CONFIG_MEMORY_SIZE 61 62 #ifdef CONFIG_MMU 63 #define __PAGE_OFFSET (0x80000000) 64 #else 65 #define __PAGE_OFFSET (0x00000000) 66 #endif 67 68 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) 69 #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET) 70 #define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET)) 71 72 #ifndef CONFIG_DISCONTIGMEM 73 #define PFN_BASE (CONFIG_MEMORY_START >> PAGE_SHIFT) 74 #define ARCH_PFN_OFFSET PFN_BASE 75 #define pfn_valid(pfn) (((pfn) - PFN_BASE) < max_mapnr) 76 #endif /* !CONFIG_DISCONTIGMEM */ 77 78 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) 79 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) 80 81 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ 82 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC ) 83 84 #define devmem_is_allowed(x) 1 85 86 #include <asm-generic/memory_model.h> 87 #include <asm-generic/getorder.h> 88 89 #endif /* _ASM_M32R_PAGE_H */ 90