文件操作 - virtconvert.h
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文件: /usr/src/linux-headers-5.15.0-186/arch/m68k/include/asm/virtconvert.h
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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __VIRT_CONVERT__ #define __VIRT_CONVERT__ /* * Macros used for converting between virtual and physical mappings. */ #ifdef __KERNEL__ #include <linux/compiler.h> #include <linux/mmzone.h> #include <asm/setup.h> #include <asm/page.h> /* * Change virtual addresses to physical addresses and vv. */ #define virt_to_phys virt_to_phys static inline unsigned long virt_to_phys(void *address) { return __pa(address); } #define phys_to_virt phys_to_virt static inline void *phys_to_virt(unsigned long address) { return __va(address); } /* Permanent address of a page. */ #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) /* * IO bus memory addresses are 1:1 with the physical address, */ #define virt_to_bus virt_to_phys #define bus_to_virt phys_to_virt #endif #endif
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