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 | #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) |
70 | extern bool __virt_addr_valid(unsigned long kaddr); |
71 | #define virt_addr_valid(kaddr) __virt_addr_valid((unsigned long) (kaddr)) |
72 | |
73 | static __always_inline u64 __canonical_address(u64 vaddr, u8 vaddr_bits) |
74 | { |
75 | return ((s64)vaddr << (64 - vaddr_bits)) >> (64 - vaddr_bits); |
76 | } |
77 | |
78 | static __always_inline u64 __is_canonical_address(u64 vaddr, u8 vaddr_bits) |
79 | { |
80 | return __canonical_address(vaddr, vaddr_bits) == vaddr; |
81 | } |
82 | |
83 | #endif /* __ASSEMBLY__ */ |
84 | |
85 | #include <asm-generic/memory_model.h> |
86 | #include <asm-generic/getorder.h> |
87 | |
88 | #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA |
89 | |
90 | #endif /* __KERNEL__ */ |
91 | #endif /* _ASM_X86_PAGE_H */ |
92 | |