fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / include / asm-m32r / page.h
blob04fd183a2c581d5dd43ab96505b72c283e053d51
1 #ifndef _ASM_M32R_PAGE_H
2 #define _ASM_M32R_PAGE_H
4 /* PAGE_SHIFT determines the page size */
5 #define PAGE_SHIFT 12
6 #define PAGE_SIZE (1UL << PAGE_SHIFT)
7 #define PAGE_MASK (~(PAGE_SIZE-1))
9 #ifdef __KERNEL__
10 #ifndef __ASSEMBLY__
12 extern void clear_page(void *to);
13 extern void copy_page(void *to, void *from);
15 #define clear_user_page(page, vaddr, pg) clear_page(page)
16 #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
18 #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
19 alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
20 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
23 * These are used to make use of C type-checking..
25 typedef struct { unsigned long pte; } pte_t;
26 typedef struct { unsigned long pmd; } pmd_t;
27 typedef struct { unsigned long pgd; } pgd_t;
28 #define pte_val(x) ((x).pte)
29 #define PTE_MASK PAGE_MASK
31 typedef struct { unsigned long pgprot; } pgprot_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__ */
44 /* to align the pointer to the (next) page boundary */
45 #define PAGE_ALIGN(addr) (((addr) + PAGE_SIZE - 1) & PAGE_MASK)
48 * This handles the memory map.. We could make this a config
49 * option, but too many people screw it up, and too few need
50 * it.
52 * A __PAGE_OFFSET of 0xC0000000 means that the kernel has
53 * a virtual address space of one gigabyte, which limits the
54 * amount of physical memory you can use to about 950MB.
56 * If you want more physical memory than this then see the CONFIG_HIGHMEM4G
57 * and CONFIG_HIGHMEM64G options in the kernel configuration.
60 #define __MEMORY_START CONFIG_MEMORY_START
61 #define __MEMORY_SIZE CONFIG_MEMORY_SIZE
63 #ifdef CONFIG_MMU
64 #define __PAGE_OFFSET (0x80000000)
65 #else
66 #define __PAGE_OFFSET (0x00000000)
67 #endif
69 #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
70 #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET)
71 #define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET))
73 #ifndef CONFIG_DISCONTIGMEM
74 #define PFN_BASE (CONFIG_MEMORY_START >> PAGE_SHIFT)
75 #define ARCH_PFN_OFFSET PFN_BASE
76 #define pfn_valid(pfn) (((pfn) - PFN_BASE) < max_mapnr)
77 #endif /* !CONFIG_DISCONTIGMEM */
79 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
80 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
82 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
83 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC )
85 #define devmem_is_allowed(x) 1
87 #include <asm-generic/memory_model.h>
88 #include <asm-generic/page.h>
90 #endif /* __KERNEL__ */
91 #endif /* _ASM_M32R_PAGE_H */