void*********************

kernel/src/kmalloc.c

@@ -1,5 +1,7 @@
+#include "kernel.h"
 #include "types.h"
 #include <kmalloc.h>
+#include <limits.h>
 #include <string.h>
 // this file contains SLUB inspired HEAP allocator
 
@@ -46,7 +48,32 @@ void* kmalloc(size_t size) {
 	    : "eax", "edx");
 
 	// freelists_all_cpus[core_id];
-	// TODO enable when we actualy know how many CPUs we have
-	if () {
+	// TODO disable when we actualy know how many CPUs we have
+	core_id = 0;
+
+	size_t alloc_index;
+	{
+		uint8_t leading_zeros = __builtin_clzll(size);
+		if (__builtin_popcountll(size) == 1) {
+			alloc_index = leading_zeros;
+		} else {
+			alloc_index = sizeof(size) * CHAR_BIT - leading_zeros;
+		}
+		if (alloc_index > KMALLOC_MAX_SIZE) {
+			// NOT IMPLEMENTED
+			printk("Cannot allocate [%lu] bytes: \e[1MNOT "
+			       "IMPLEMENTED!\e[8M\n",
+			       size);
+			return NULL;
+		}
+		alloc_index -= LOWEST_POWER;
+	}
+	void** selected_freelist =
+	    freelists_all_cpus[core_id].freelists[alloc_index];
+	if (selected_freelist != NULL) {
+		// fast path
+		void** second_item_in_list = *selected_freelist;
+	} else {
+		// slower path
 	}
 }