Rework x86_64 paging and vmm

kernel/vmm/vmm.h

@@ -2,18 +2,17 @@
 #define VMM_VMM_H_
 
 #include <stddef.h>
-#include "bitmap/bitmap.h"
 #include "spinlock/spinlock.h"
+#include "bootinfo/bootinfo.h"
 
 typedef struct {
   SpinLock spinlock;
-  BitMap self;
 } VirtMem;
 
 extern VirtMem VIRT_MEM;
 
 void vmm_init(void);
-void *vmm_alloc(size_t pages);
-void vmm_free(void *ptr, size_t pages);
+
+#define VIRT(X) ((void *)(BOOT_INFO.hhdm_off + (uint64_t)(X)))
 
 #endif //  VMM_VMM_H_