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65 lines
1.5 KiB
65 lines
1.5 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _ASM_X86_PAGE_64_H |
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#define _ASM_X86_PAGE_64_H |
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#include <asm/page_64_types.h> |
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#ifndef __ASSEMBLY__ |
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#include <asm/alternative.h> |
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/* duplicated to the one in bootmem.h */ |
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extern unsigned long max_pfn; |
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extern unsigned long phys_base; |
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extern unsigned long page_offset_base; |
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extern unsigned long vmalloc_base; |
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extern unsigned long vmemmap_base; |
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static inline unsigned long __phys_addr_nodebug(unsigned long x) |
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{ |
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unsigned long y = x - __START_KERNEL_map; |
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/* use the carry flag to determine if x was < __START_KERNEL_map */ |
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x = y + ((x > y) ? phys_base : (__START_KERNEL_map - PAGE_OFFSET)); |
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return x; |
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} |
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#ifdef CONFIG_DEBUG_VIRTUAL |
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extern unsigned long __phys_addr(unsigned long); |
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extern unsigned long __phys_addr_symbol(unsigned long); |
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#else |
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#define __phys_addr(x) __phys_addr_nodebug(x) |
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#define __phys_addr_symbol(x) \ |
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((unsigned long)(x) - __START_KERNEL_map + phys_base) |
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#endif |
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#define __phys_reloc_hide(x) (x) |
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#ifdef CONFIG_FLATMEM |
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#define pfn_valid(pfn) ((pfn) < max_pfn) |
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#endif |
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void clear_page_orig(void *page); |
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void clear_page_rep(void *page); |
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void clear_page_erms(void *page); |
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static inline void clear_page(void *page) |
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{ |
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alternative_call_2(clear_page_orig, |
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clear_page_rep, X86_FEATURE_REP_GOOD, |
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clear_page_erms, X86_FEATURE_ERMS, |
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"=D" (page), |
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"0" (page) |
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: "cc", "memory", "rax", "rcx"); |
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} |
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void copy_page(void *to, void *from); |
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#endif /* !__ASSEMBLY__ */ |
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#ifdef CONFIG_X86_VSYSCALL_EMULATION |
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# define __HAVE_ARCH_GATE_AREA 1 |
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#endif |
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#endif /* _ASM_X86_PAGE_64_H */
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