Kernel: Add new generic Printer class

kprint is now just a #define to Printer::print<terminal_putc>.

This allows us to use same print formatting for serial output :)

kernel/kernel/kernel.cpp

@@ -1,14 +1,15 @@
 #include <kernel/GDT.h>
 #include <kernel/IDT.h>
+#include <kernel/IO.h>
 #include <kernel/Keyboard.h>
 #include <kernel/kmalloc.h>
+#include <kernel/kprint.h>
 #include <kernel/multiboot.h>
 #include <kernel/panic.h>
 #include <kernel/PIC.h>
 #include <kernel/PIT.h>
+#include <kernel/Serial.h>
 #include <kernel/tty.h>
-#include <kernel/kprint.h>
-#include <kernel/IO.h>
 
 #include <string.h>
 #include <stdlib.h>
@@ -22,6 +23,12 @@ void on_key_press(Keyboard::Key key, uint8_t modifiers, bool pressed)
 {
 	if (pressed)
 	{
+		if (key == Keyboard::Key::Escape)
+		{
+			kprint("time since boot: {} ms\n", PIT::ms_since_boot());
+			return;
+		}
+
 		char ascii = Keyboard::key_to_ascii(key, modifiers);
 		if (ascii)
 			kprint("{}", ascii);
@@ -36,9 +43,13 @@ void kernel_main(multiboot_info_t* mbi, uint32_t magic)
 	s_multiboot_info = mbi;
 
 	if (magic != 0x2BADB002)
-		goto halt;
+		return;
 
-	terminal_initialize();
+	if (mbi->framebuffer.type != 2)
+		return;
+
+	TTY::initialize();
+	Serial::initialize();
 
 	kmalloc_initialize();
 
@@ -49,11 +60,18 @@ void kernel_main(multiboot_info_t* mbi, uint32_t magic)
 	PIT::initialize();
 	Keyboard::initialize(on_key_press);
 
-	kprint("Hello from the kernel!\n");
 
-	ENABLE_INTERRUPTS();
+	kprintln("Hello from the kernel!");
+
+	dprintln("Hello emulator from kernel!");
+
+	int** lol = new int*[10];
+	for (int i = 0; i < 10; i++)
+		lol[i] = new int;
+
+	kprint("{.2}\n", -12.123f);
+	kprint("0x{.H}", 0xcafebabe);
 
-halt:
 	for (;;)
 	{
 		asm("hlt");