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82 lines
2.2 KiB
82 lines
2.2 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _ASM_X86_PAGE_H |
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#define _ASM_X86_PAGE_H |
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#include <linux/types.h> |
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#ifdef __KERNEL__ |
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#include <asm/page_types.h> |
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#ifdef CONFIG_X86_64 |
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#include <asm/page_64.h> |
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#else |
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#include <asm/page_32.h> |
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#endif /* CONFIG_X86_64 */ |
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#ifndef __ASSEMBLY__ |
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struct page; |
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#include <linux/range.h> |
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extern struct range pfn_mapped[]; |
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extern int nr_pfn_mapped; |
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static inline void clear_user_page(void *page, unsigned long vaddr, |
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struct page *pg) |
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{ |
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clear_page(page); |
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} |
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static inline void copy_user_page(void *to, void *from, unsigned long vaddr, |
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struct page *topage) |
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{ |
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copy_page(to, from); |
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} |
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#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \ |
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alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr) |
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#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE |
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#ifndef __pa |
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#define __pa(x) __phys_addr((unsigned long)(x)) |
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#endif |
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#define __pa_nodebug(x) __phys_addr_nodebug((unsigned long)(x)) |
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/* __pa_symbol should be used for C visible symbols. |
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This seems to be the official gcc blessed way to do such arithmetic. */ |
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/* |
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* We need __phys_reloc_hide() here because gcc may assume that there is no |
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* overflow during __pa() calculation and can optimize it unexpectedly. |
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* Newer versions of gcc provide -fno-strict-overflow switch to handle this |
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* case properly. Once all supported versions of gcc understand it, we can |
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* remove this Voodoo magic stuff. (i.e. once gcc3.x is deprecated) |
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*/ |
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#define __pa_symbol(x) \ |
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__phys_addr_symbol(__phys_reloc_hide((unsigned long)(x))) |
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#ifndef __va |
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#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) |
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#endif |
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#define __boot_va(x) __va(x) |
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#define __boot_pa(x) __pa(x) |
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/* |
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* virt_to_page(kaddr) returns a valid pointer if and only if |
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* virt_addr_valid(kaddr) returns true. |
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*/ |
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#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) |
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#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) |
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extern bool __virt_addr_valid(unsigned long kaddr); |
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#define virt_addr_valid(kaddr) __virt_addr_valid((unsigned long) (kaddr)) |
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#endif /* __ASSEMBLY__ */ |
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#include <asm-generic/memory_model.h> |
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#include <asm-generic/getorder.h> |
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#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA |
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#endif /* __KERNEL__ */ |
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#endif /* _ASM_X86_PAGE_H */
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