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📄 io.h (Read Only) ⬅ To go back
#ifndef ARCH_X86_IO_H
#define ARCH_X86_IO_H

#include <stdint.h>

static inline void outb(uint16_t port, uint8_t val) {
    __asm__ volatile ("outb %0, %1" : : "a"(val), "Nd"(port));
}

static inline void outw(uint16_t port, uint16_t val) {
    __asm__ volatile ("outw %0, %1" : : "a"(val), "Nd"(port));
}

static inline void outl(uint16_t port, uint32_t val) {
    __asm__ volatile ("outl %0, %1" : : "a"(val), "Nd"(port));
}

static inline uint8_t inb(uint16_t port) {
    uint8_t ret;
    __asm__ volatile ("inb %1, %0" : "=a"(ret) : "Nd"(port));
    return ret;
}

static inline uint16_t inw(uint16_t port) {
    uint16_t ret;
    __asm__ volatile ("inw %1, %0" : "=a"(ret) : "Nd"(port));
    return ret;
}

static inline uint32_t inl(uint16_t port) {
    uint32_t ret;
    __asm__ volatile ("inl %1, %0" : "=a"(ret) : "Nd"(port));
    return ret;
}

#endif