minios/ports.h at main · Distendo/minios · GitHub

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#ifndef PORTS_H
#define PORTS_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 uint8_t inb(uint16_t port) {
    uint8_t ret;
    __asm__ volatile ("inb %1, %0" : "=a"(ret) : "Nd"(port));
    return ret;
}

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

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

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

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

static inline void io_wait(void) {
    outb(0x80, 0);
}

#endif