20 lines
439 B
C
20 lines
439 B
C
#ifndef KERNEL_IO_H
|
|
#define KERNEL_IO_H
|
|
|
|
#include <libc/stdint.h>
|
|
|
|
static inline void OutPortByte(uint16_t port, uint8_t val) {
|
|
__asm__ volatile ("outb %0, %1" : : "a"(val), "Nd"(port));
|
|
}
|
|
|
|
static inline uint8_t InPortByte(uint16_t port) {
|
|
uint8_t ret;
|
|
__asm__ volatile ("inb %1, %0" : "=a"(ret) : "Nd"(port));
|
|
return ret;
|
|
}
|
|
|
|
static inline void IoWait(void) {
|
|
__asm__ volatile ("outb %%al, $0x80" : : "a"(0));
|
|
}
|
|
|
|
#endif |