1 #ifndef _ASM_X86_PAGE_H 2 #define _ASM_X86_PAGE_H 3 4 #include <linux/types.h> 5 6 #ifdef __KERNEL__ 7 8 #include <asm/page_types.h> 9 10 #ifdef CONFIG_X86_64 11 #include <asm/page_64.h> 12 #else 13 #include <asm/page_32.h> 14 #endif /* CONFIG_X86_64 */ 15 16 #ifndef __ASSEMBLY__ 17 18 struct page; 19 20 #include <linux/range.h> 21 extern struct range pfn_mapped[]; 22 extern int nr_pfn_mapped; 23 24 static inline void clear_user_page(void *page, unsigned long vaddr, 25 struct page *pg) 26 { 27 clear_page(page); 28 } 29 30 static inline void copy_user_page(void *to, void *from, unsigned long vaddr, 31 struct page *topage) 32 { 33 copy_page(to, from); 34 } 35 36 #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \ 37 alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr) 38 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE 39 40 #define __pa(x) __phys_addr((unsigned long)(x)) 41 #define __pa_nodebug(x) __phys_addr_nodebug((unsigned long)(x)) 42 /* __pa_symbol should be used for C visible symbols. 43 This seems to be the official gcc blessed way to do such arithmetic. */ 44 /* 45 * We need __phys_reloc_hide() here because gcc may assume that there is no 46 * overflow during __pa() calculation and can optimize it unexpectedly. 47 * Newer versions of gcc provide -fno-strict-overflow switch to handle this 48 * case properly. Once all supported versions of gcc understand it, we can 49 * remove this Voodoo magic stuff. (i.e. once gcc3.x is deprecated) 50 */ 51 #define __pa_symbol(x) \ 52 __phys_addr_symbol(__phys_reloc_hide((unsigned long)(x))) 53 54 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) 55 56 #define __boot_va(x) __va(x) 57 #define __boot_pa(x) __pa(x) 58 59 /* 60 * virt_to_page(kaddr) returns a valid pointer if and only if 61 * virt_addr_valid(kaddr) returns true. 62 */ 63 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) 64 #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) 65 extern bool __virt_addr_valid(unsigned long kaddr); 66 #define virt_addr_valid(kaddr) __virt_addr_valid((unsigned long) (kaddr)) 67 68 #endif /* __ASSEMBLY__ */ 69 70 #include <asm-generic/memory_model.h> 71 #include <asm-generic/getorder.h> 72 73 #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA 74 75 #endif /* __KERNEL__ */ 76 #endif /* _ASM_X86_PAGE_H */ 77