Got memory info from multiboot & minor adjustments

kernel/src/kernel.c

@@ -1,25 +1,49 @@
+#include <multiboot.h>
 #include <kernel.h>
 #include <serial.h>
+#include <pmm.h>
 #include <tty.h>
 
 #define _hlt()	while (1) __asm__ volatile ("cli; hlt");
 
-__noreturn
-void kmain(void) {
-	serial_init(COM1);
-	serial_print(COM1, "kern.\n\n");
-	while (1) {
-		char c = serial_recv(COM1);
-		serial_send(COM1, c);
-		if (c == '\r') {
-			serial_send(COM1, '\n');
-			break;
-		}
+char* itoa(uint8_t n) {
+	static char str[32];
+	int i = sizeof(str) - 2;
+	while (n) {
+		str[i--] = (n % 10) + '0';
+		n /= 10;
 	}
+	str[sizeof(str) - 1] = '\0';
+	return &str[i+1];
+}
 
+__noreturn
+void kmain(void* ptr) {
+	multiboot_info_t* mbi = ptr;
+
+	// Serial console for debugging
+	serial_init(COM1);
+	serial_puts(COM1, "\x1b[0H\x1b[Jkern.\n");
+
+	// Check if we have a valid memmap
+	if (!(mbi->flags >> 6 & 1)) {
+		panic("Invalid memory map.");
+	}
+
+	// VGA tty thingy
 	tty_init();
-	tty_puts("Hello, World!\n");
+	tty_puts("kern.");
+
+	// Memory manager init
+	// pmm_init();
+	// vmm_init();
+
+	// x86 shit
+	// gdt_init();
+	// isr_init();
+	
+	/* TODO: Commeted out stuff */
 
-	panic("kmain() reached end!");
+	panic("kmain() reached end.");
 }