1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_X86_PAGE_H 3 #define _ASM_X86_PAGE_H 4 5 #include <linux/types.h> 6 7 #ifdef __KERNEL__ 8 9 #include <asm/page_types.h> 10 11 #ifdef CONFIG_X86_64 12 #include <asm/page_64.h> 13 #else 14 #include <asm/page_32.h> 15 #endif /* CONFIG_X86_64 */ 16 17 #ifndef __ASSEMBLY__ 18 19 struct page; 20 21 #include <linux/range.h> 22 extern struct range pfn_mapped[]; 23 extern int nr_pfn_mapped; 24 25 static inline void clear_user_page(void *page, unsigned long vaddr, 26 struct page *pg) 27 { 28 clear_page(page); 29 } 30 31 static inline void copy_user_page(void *to, void *from, unsigned long vaddr, 32 struct page *topage) 33 { 34 copy_page(to, from); 35 } 36 37 #define alloc_zeroed_user_highpage_movable(vma, vaddr) \ 38 alloc_page_vma(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, vma, vaddr) 39 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE_MOVABLE 40 41 #ifndef __pa 42 #define __pa(x) __phys_addr((unsigned long)(x)) 43 #endif 44 45 #define __pa_nodebug(x) __phys_addr_nodebug((unsigned long)(x)) 46 /* __pa_symbol should be used for C visible symbols. 47 This seems to be the official gcc blessed way to do such arithmetic. */ 48 /* 49 * We need __phys_reloc_hide() here because gcc may assume that there is no 50 * overflow during __pa() calculation and can optimize it unexpectedly. 51 * Newer versions of gcc provide -fno-strict-overflow switch to handle this 52 * case properly. Once all supported versions of gcc understand it, we can 53 * remove this Voodoo magic stuff. (i.e. once gcc3.x is deprecated) 54 */ 55 #define __pa_symbol(x) \ 56 __phys_addr_symbol(__phys_reloc_hide((unsigned long)(x))) 57 58 #ifndef __va 59 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) 60 #endif 61 62 #define __boot_va(x) __va(x) 63 #define __boot_pa(x) __pa(x) 64 65 /* 66 * virt_to_page(kaddr) returns a valid pointer if and only if 67 * virt_addr_valid(kaddr) returns true. 68 */ 69 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) 70 #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) 71 extern bool __virt_addr_valid(unsigned long kaddr); 72 #define virt_addr_valid(kaddr) __virt_addr_valid((unsigned long) (kaddr)) 73 74 static __always_inline u64 __canonical_address(u64 vaddr, u8 vaddr_bits) 75 { 76 return ((s64)vaddr << (64 - vaddr_bits)) >> (64 - vaddr_bits); 77 } 78 79 static __always_inline u64 __is_canonical_address(u64 vaddr, u8 vaddr_bits) 80 { 81 return __canonical_address(vaddr, vaddr_bits) == vaddr; 82 } 83 84 #endif /* __ASSEMBLY__ */ 85 86 #include <asm-generic/memory_model.h> 87 #include <asm-generic/getorder.h> 88 89 #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA 90 91 #endif /* __KERNEL__ */ 92 #endif /* _ASM_X86_PAGE_H */ 93