test axi files, incomplete

README.md

 # x393_sata
 SATA controller for x393 camera
+# Current step:
+Creating simple testbench structure, placing some register @ axi iface (+axi slave onto maxigp1), simulate them.
+To syntesize, try to access these registers (read+write)
+# Going to do afterwards:
+Connect Ashwin's core and make it work at least somehow (write system level tests and application level rtl). Write host controller with ~same functionallity, check if it works with previously verified higher-level code.
+And then to spin out the full-compatible functionallity (ideally somewhere to the level of ahci)