1 #ifndef _ASM_M32R_PAGE_H
2 #define _ASM_M32R_PAGE_H
4 /* PAGE_SHIFT determines the page size */
6 #define PAGE_SIZE (1UL << PAGE_SHIFT)
7 #define PAGE_MASK (~(PAGE_SIZE-1))
11 extern void clear_page(void *to);
12 extern void copy_page(void *to, void *from);
14 #define clear_user_page(page, vaddr, pg) clear_page(page)
15 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
17 #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
18 alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
19 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
22 * These are used to make use of C type-checking..
24 typedef struct { unsigned long pte; } pte_t;
25 typedef struct { unsigned long pmd; } pmd_t;
26 typedef struct { unsigned long pgd; } pgd_t;
27 #define pte_val(x) ((x).pte)
28 #define PTE_MASK PAGE_MASK
30 typedef struct { unsigned long pgprot; } pgprot_t;
31 typedef struct page *pgtable_t;
33 #define pmd_val(x) ((x).pmd)
34 #define pgd_val(x) ((x).pgd)
35 #define pgprot_val(x) ((x).pgprot)
37 #define __pte(x) ((pte_t) { (x) } )
38 #define __pmd(x) ((pmd_t) { (x) } )
39 #define __pgd(x) ((pgd_t) { (x) } )
40 #define __pgprot(x) ((pgprot_t) { (x) } )
42 #endif /* !__ASSEMBLY__ */
45 * This handles the memory map.. We could make this a config
46 * option, but too many people screw it up, and too few need
49 * A __PAGE_OFFSET of 0xC0000000 means that the kernel has
50 * a virtual address space of one gigabyte, which limits the
51 * amount of physical memory you can use to about 950MB.
53 * If you want more physical memory than this then see the CONFIG_HIGHMEM4G
54 * and CONFIG_HIGHMEM64G options in the kernel configuration.
57 #define __MEMORY_START CONFIG_MEMORY_START
58 #define __MEMORY_SIZE CONFIG_MEMORY_SIZE
61 #define __PAGE_OFFSET (0x80000000)
63 #define __PAGE_OFFSET (0x00000000)
66 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
67 #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET)
68 #define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET))
70 #ifndef CONFIG_DISCONTIGMEM
71 #define PFN_BASE (CONFIG_MEMORY_START >> PAGE_SHIFT)
72 #define ARCH_PFN_OFFSET PFN_BASE
73 #define pfn_valid(pfn) (((pfn) - PFN_BASE) < max_mapnr)
74 #endif /* !CONFIG_DISCONTIGMEM */
76 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
77 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
79 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
80 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC )
82 #define devmem_is_allowed(x) 1
84 #include <asm-generic/memory_model.h>
85 #include <asm-generic/getorder.h>
87 #endif /* _ASM_M32R_PAGE_H */