Serial comm kernel process

kernel/hal/x86_64/hal.c

@@ -2,17 +2,12 @@
 #include <stdbool.h>
 #include "hal/hal.h"
 #include "kprintf.h"
-#include "serial.h"
 #include "gdt.h"
 #include "intr.h"
 #include "pic.h"
 #include "pit.h"
 
 void hal_init(void) {
-  if (!serial_init()) {
-    hal_hang(); // going further makes no sense
-  }
-  LOG("hal", "serial init\n");
   gdt_init();
   intr_init();
   pic_init();

kernel/hal/x86_64/serial.c

@@ -1,51 +0,0 @@
-#include <stdint.h>
-#include <stdbool.h>
-#include "io.h"
-#include "putchar.h"
-
-#define SERIAL_PORT 0x3f8
-
-static int serial_received(void) {
-  return io_in8(SERIAL_PORT + 5) & 1;
-}
-
-static uint8_t serial_read(void) {
-  while (serial_received() == 0);
-  return io_in8(SERIAL_PORT);
-}
-
-static int serial_trans_empty(void) {
-  return io_in8(SERIAL_PORT + 5) & 0x20;
-}
-
-static void serial_write(uint8_t value) {
-  while (!serial_trans_empty());
-  io_out8(SERIAL_PORT, value);
-}
-
-// REFERENCE: https://wiki.osdev.org/Serial_Ports
-bool serial_init(void) {
-  io_out8(SERIAL_PORT + 1, 0x00); 
-  io_out8(SERIAL_PORT + 3, 0x80); 
-  io_out8(SERIAL_PORT + 0, 0x03);
-  io_out8(SERIAL_PORT + 1, 0x00);
-  io_out8(SERIAL_PORT + 3, 0x03);
-  io_out8(SERIAL_PORT + 2, 0xc7);
-  io_out8(SERIAL_PORT + 4, 0x0b);
-  io_out8(SERIAL_PORT + 4, 0x1e);
-  io_out8(SERIAL_PORT + 0, 0xae);
-
-  if (io_in8(SERIAL_PORT + 0) != 0xae) {
-    return false;
-  }
-
-  io_out8(SERIAL_PORT + 4, 0x0f);
-  return true;
-}
-
-#if PUTCHAR_ == PUTCHAR_SERIAL
-  // For printf library
-  void putchar_(char c) {
-    serial_write(c);
-  }
-#endif

kernel/hal/x86_64/serial.h

@@ -1,8 +0,0 @@
-#ifndef HAL_SERIAL_H_
-#define HAL_SERIAL_H_
-
-#include <stdbool.h>
-
-bool serial_init(void);
-
-#endif // HAL_SERIAL_H_