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 vma_alloc_zeroed_movable_folio(vma, vaddr) \ 38 vma_alloc_folio(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, 0, vma, vaddr, false) 39 40 #ifndef __pa 41 #define __pa(x) __phys_addr((unsigned long)(x)) 42 #endif 43 44 #define __pa_nodebug(x) __phys_addr_nodebug((unsigned long)(x)) 45 /* __pa_symbol should be used for C visible symbols. 46 This seems to be the official gcc blessed way to do such arithmetic. */ 47 /* 48 * We need __phys_reloc_hide() here because gcc may assume that there is no 49 * overflow during __pa() calculation and can optimize it unexpectedly. 50 * Newer versions of gcc provide -fno-strict-overflow switch to handle this 51 * case properly. Once all supported versions of gcc understand it, we can 52 * remove this Voodoo magic stuff. (i.e. once gcc3.x is deprecated) 53 */ 54 #define __pa_symbol(x) \ 55 __phys_addr_symbol(__phys_reloc_hide((unsigned long)(x))) 56 57 #ifndef __va 58 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) 59 #endif 60 61 #define __boot_va(x) __va(x) 62 #define __boot_pa(x) __pa(x) 63 64 /* 65 * virt_to_page(kaddr) returns a valid pointer if and only if 66 * virt_addr_valid(kaddr) returns true. 67 */ 68 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) 69 extern bool __virt_addr_valid(unsigned long kaddr); 70 #define virt_addr_valid(kaddr) __virt_addr_valid((unsigned long) (kaddr)) 71 72 static __always_inline void *pfn_to_kaddr(unsigned long pfn) 73 { 74 return __va(pfn << PAGE_SHIFT); 75 } 76 77 static __always_inline u64 __canonical_address(u64 vaddr, u8 vaddr_bits) 78 { 79 return ((s64)vaddr << (64 - vaddr_bits)) >> (64 - vaddr_bits); 80 } 81 82 static __always_inline u64 __is_canonical_address(u64 vaddr, u8 vaddr_bits) 83 { 84 return __canonical_address(vaddr, vaddr_bits) == vaddr; 85 } 86 87 #endif /* __ASSEMBLY__ */ 88 89 #include <asm-generic/memory_model.h> 90 #include <asm-generic/getorder.h> 91 92 #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA 93 94 #endif /* __KERNEL__ */ 95 #endif /* _ASM_X86_PAGE_H */ 96