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 13extern void clear_page(void *to); 14extern 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 */ 26typedef struct { unsigned long pte; } pte_t; 27typedef struct { unsigned long pmd; } pmd_t; 28typedef struct { unsigned long pgd; } pgd_t; 29#define pte_val(x) ((x).pte) 30#define PTE_MASK PAGE_MASK 31 32typedef struct { unsigned long pgprot; } pgprot_t; 33typedef 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