Add HURL; relocate kernel virtual regions

src/hulk/bootinfo.d

@@ -13,7 +13,7 @@ struct BootInfo
      */
     struct Framebuffer
     {
-        /** Framebuffer base address. */
+        /** Framebuffer physical base address. */
         uint * buffer;
         /** Horizontal resolution. */
         uint width;
@@ -68,6 +68,3 @@ struct BootInfo
     /* Physical address of stack while jumping to HULK. */
     ulong stack_phys;
 }
-
-/** HULK base virtual address. */
-enum ulong HULK_VIRTUAL_START = 0x0000_4000_0000_0000u;