def METHOD_NAME(self):
    shmem = SEPShMem()
    # PNIC - panic buffer
    shmem.add_item(b"CINP", b"\x00", 0x8000)
    # ALPO / SIPS - unknown img4-like blobs from the ADT
    addr, sz = self.u.adt["/chosen/boot-object-manifests"].lpol
    shmem.add_item(b"OPLA", self.i.readmem(addr, sz))
    addr, sz = self.u.adt["/chosen/boot-object-manifests"].ibot
    shmem.add_item(b"IPIS", self.i.readmem(addr, sz))
    bfr = shmem.finalize()
    sz = align_up(len(bfr), 0x4000)
    self.shmem = self.u.heap.memalign(0x4000, 0x30000)
    self.i.writemem(self.shmem, bfr)
    self.p.dart_map(self.dart_handle, self.SHMEM_IOVA, self.shmem, 0x30000)