文件操作 - vga.h
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文件: /usr/src/linux-headers-5.15.0-113/include/asm-generic/vga.h
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/* SPDX-License-Identifier: GPL-2.0 */ /* * Access to VGA videoram * * (c) 1998 Martin Mares <mj@ucw.cz> */ #ifndef __ASM_GENERIC_VGA_H #define __ASM_GENERIC_VGA_H /* * On most architectures that support VGA, we can just * recalculate addresses and then access the videoram * directly without any black magic. * * Everyone else needs to ioremap the address and use * proper I/O accesses. */ #ifndef VGA_MAP_MEM #define VGA_MAP_MEM(x, s) (unsigned long)phys_to_virt(x) #endif #define vga_readb(x) (*(x)) #define vga_writeb(x, y) (*(y) = (x)) #endif /* _ASM_GENERIC_VGA_H */
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