I understand cortex-m55 default address map suggests the following possible address range where possibly Code can be fetched from
0x00000000-0x1FFFFFFF Code All accesses are performed on the Instruction Tightly Coupled Memory (ITCM) or Master-AXI (M-AXI) interface.
That suggests the bootcode (starting from reset vector where VTOR points to) and other initial code must be either placed with in this address range Or in the ITCM?