| | 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 __ASSEMBLER__ |
| | 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) |
| | 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 /* __ASSEMBLER__ */ |
| | 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 */ |
projects / linux-2.6-block.git / blame_incremental