[fi] Add register file cmd handler

This commit adds the command handlers for the following FI tests:
- ibex.char.register_file_read
- ibex.char.register_file

The device code is located in lowRISC/opentitan#21359

Signed-off-by: Pascal Nasahl <[email protected]>

fault_injection/configs/pen.global_fi.ibex.char.register_file.cw310.yaml

@@ -0,0 +1,39 @@
+target:
+  target_type: cw310
+  fpga_bitstream: "../objs/lowrisc_systems_chip_earlgrey_cw310_0.1.bit"
+  force_program_bitstream: False
+  fw_bin: "../objs/sca_ujson_fpga_cw310.bin"
+  output_len_bytes: 16
+  target_clk_mult: 0.24
+  target_freq: 24000000
+  baudrate: 115200
+  protocol: "ujson"
+  port: "/dev/ttyACM4"
+fisetup:
+  fi_gear: "husky"
+  fi_type: "voltage_glitch"
+  parameter_generation: "random"
+  # Voltage glitch width in cycles.
+  glitch_width_min: 5
+  glitch_width_max: 150
+  glitch_width_step: 3
+  # Range for trigger delay in cycles.
+  trigger_delay_min: 0
+  trigger_delay_max: 500
+  trigger_step: 10
+  # Number of iterations for the parameter sweep.
+  num_iterations: 100
+fiproject:
+  # Project database type and memory threshold.
+  project_db: "ot_fi_project"
+  project_mem_threshold: 10000
+  # Store FI plot.
+  show_plot: True
+  num_plots: 10
+  plot_x_axis: "trigger_delay"
+  plot_x_axis_legend: "[cycles]"
+  plot_y_axis: "glitch_width"
+  plot_y_axis_legend: "[cycles]"
+test:
+  which_test: "ibex_char_register_file"
+  expected_result: '{"result":0,"err_status":0}'

fault_injection/configs/pen.global_fi.ibex.char.register_file_read.cw310.yaml

@@ -0,0 +1,39 @@
+target:
+  target_type: cw310
+  fpga_bitstream: "../objs/lowrisc_systems_chip_earlgrey_cw310_0.1.bit"
+  force_program_bitstream: False
+  fw_bin: "../objs/sca_ujson_fpga_cw310.bin"
+  output_len_bytes: 16
+  target_clk_mult: 0.24
+  target_freq: 24000000
+  baudrate: 115200
+  protocol: "ujson"
+  port: "/dev/ttyACM4"
+fisetup:
+  fi_gear: "husky"
+  fi_type: "voltage_glitch"
+  parameter_generation: "random"
+  # Voltage glitch width in cycles.
+  glitch_width_min: 5
+  glitch_width_max: 150
+  glitch_width_step: 3
+  # Range for trigger delay in cycles.
+  trigger_delay_min: 0
+  trigger_delay_max: 500
+  trigger_step: 10
+  # Number of iterations for the parameter sweep.
+  num_iterations: 100
+fiproject:
+  # Project database type and memory threshold.
+  project_db: "ot_fi_project"
+  project_mem_threshold: 10000
+  # Store FI plot.
+  show_plot: True
+  num_plots: 10
+  plot_x_axis: "trigger_delay"
+  plot_x_axis_legend: "[cycles]"
+  plot_y_axis: "glitch_width"
+  plot_y_axis_legend: "[cycles]"
+test:
+  which_test: "ibex_char_register_file_read"
+  expected_result: '{"result":0,"err_status":0}'

target/communication/fi_ibex_commands.py

@@ -108,6 +108,24 @@ def ibex_char_conditional_branch(self) -> None:
         time.sleep(0.01)
         self.target.write(json.dumps("CharCondBranch").encode("ascii"))
 
+    def ibex_char_register_file(self) -> None:
+        """ Starts the ibex.char.register_file test.
+        """
+        # IbexFi command.
+        self._ujson_ibex_fi_cmd()
+        # CharRegisterFile command.
+        time.sleep(0.01)
+        self.target.write(json.dumps("CharRegisterFile").encode("ascii"))
+
+    def ibex_char_register_file_read(self) -> None:
+        """ Starts the ibex.char.register_file_read test.
+        """
+        # IbexFi command.
+        self._ujson_ibex_fi_cmd()
+        # CharRegisterFileRead command.
+        time.sleep(0.01)
+        self.target.write(json.dumps("CharRegisterFileRead").encode("ascii"))
+
     def init_trigger(self) -> None:
         """ Initialize the FI trigger on the chip.