49 lines
1.4 KiB
C
49 lines
1.4 KiB
C
/**
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* @file kernel/arch/x86_64/ports.c
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* @brief Port I/O methods for x86-64.
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*
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* @copyright
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* This file is part of ToaruOS and is released under the terms
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* of the NCSA / University of Illinois License - see LICENSE.md
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* Copyright (C) 2021 K. Lange
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*/
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#include <kernel/types.h>
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unsigned short inports(unsigned short _port) {
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unsigned short rv;
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asm volatile ("inw %1, %0" : "=a" (rv) : "dN" (_port));
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return rv;
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}
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void outports(unsigned short _port, unsigned short _data) {
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asm volatile ("outw %1, %0" : : "dN" (_port), "a" (_data));
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}
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unsigned int inportl(unsigned short _port) {
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unsigned int rv;
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asm volatile ("inl %%dx, %%eax" : "=a" (rv) : "dN" (_port));
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return rv;
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}
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void outportl(unsigned short _port, unsigned int _data) {
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asm volatile ("outl %%eax, %%dx" : : "dN" (_port), "a" (_data));
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}
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unsigned char inportb(unsigned short _port) {
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unsigned char rv;
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asm volatile ("inb %1, %0" : "=a" (rv) : "dN" (_port));
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return rv;
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}
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void outportb(unsigned short _port, unsigned char _data) {
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asm volatile ("outb %1, %0" : : "dN" (_port), "a" (_data));
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}
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void outportsm(unsigned short port, unsigned char * data, unsigned long size) {
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asm volatile ("rep outsw" : "+S" (data), "+c" (size) : "d" (port));
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}
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void inportsm(unsigned short port, unsigned char * data, unsigned long size) {
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asm volatile ("rep insw" : "+D" (data), "+c" (size) : "d" (port) : "memory");
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}
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