feat: cleanup init code, small other refactors

kernel/drivers/keyboard.c

@@ -8,6 +8,7 @@
 #include <myke/libc/ringqueue.h>
 #include <myke/libk/libk.h>
 #include <myke/libk/syscall.h>
+#include <myke/util/init.h>
 
 
 const char scancode_map_lowercase[] = {
@@ -131,7 +132,7 @@ static void keyboard_callback(isr_registers_t *regs) {
     publish_key_event(scancode);
 }
 
-void init_keyboard() {
+void keyboard_init() {
     register_interrupt_handler(IRQ1, keyboard_callback);
     keyboard_state.shift = 0;
     keyboard_state.ctrl = 0;
@@ -139,3 +140,9 @@ void init_keyboard() {
     keyboard_state.extended = 0;
     keyboard_event_buffer = create_buffer(256, sizeof(KeyEvent));
 }
+
+INIT_FUNCTION(100) = {
+        .name = "keyboard",
+        .stage = INIT_STAGE_LATE_BOOT,
+        .init = keyboard_init,
+};

kernel/drivers/serial.c

@@ -2,9 +2,10 @@
 // Created by rick on 28-01-21.
 //
 
-#include <myke/drivers/serial.h>
 #include <sys/types.h>
 #include <myke/drivers/ports.h>
+#include <myke/libk/kprint.h>
+#include <myke/util/init.h>
 
 #define SERIAL_INTERRUPT_DATA_AVAILABLE     (1 << 0)
 #define SERIAL_INTERRUPT_TRANSMITTER_EMPTY  (1 << 1)
@@ -51,7 +52,7 @@
 #define MODEM_CONTROL_LOOPBACK_MODE             (1 << 4)
 #define MODEM_CONTROL_AUTOFLOW_CONTROL_ENABLED  (1 << 5)
 
-int serial_init() {
+int serial_init_hw() {
     port_byte_out(PORT_SERIAL_0 + PORT_SERIAL_INTERRUPT, 0);    // Disable all interrupts
     port_byte_out(PORT_SERIAL_0 + PORT_SERIAL_LINE_CONTROL,
                   LINE_CONTROL_DIVISOR);    // Enable DLAB (set baud rate divisor)
@@ -114,4 +115,17 @@ void serial_kprint(const char *msg) {
         write_serial(c);
         i++;
     }
-}
+}
+
+void serial_init() {
+    if (serial_init_hw() != 0) {
+        return;
+    }
+    kprint_register(serial_kprint);
+}
+
+INIT_FUNCTION(100) = {
+        .name = "serial",
+        .stage = INIT_STAGE_EARLY_BOOT_0,
+        .init = serial_init,
+};

kernel/drivers/vgascreen.c

@@ -3,9 +3,11 @@
 //
 
 #include <string.h>
-#include <myke/drivers/vgascreen.h>
 
 #include <myke/drivers/ports.h>
+#include <myke/drivers/vgascreen.h>
+#include <myke/libk/kprint.h>
+#include <myke/util/init.h>
 
 char *_vga_character_memory = (char *) VGA_CHARACTER_MEMORY_LOCATION;
 
@@ -136,3 +138,14 @@ int get_offset_row(int offset) {
 int get_offset_col(int offset) {
     return (offset - (get_offset_row(offset) * 2 * VGA_COL_MAX)) / 2;
 }
+
+void vga_init() {
+    vga_clear_screen();
+    kprint_register(vga_kprint);
+}
+
+INIT_FUNCTION(100) = {
+        .name = "vga",
+        .stage = INIT_STAGE_EARLY_BOOT_0,
+        .init = vga_init,
+};