66 строки
1.5 KiB
C
66 строки
1.5 KiB
C
/* 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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