diff --git a/sw/device/silicon_creator/mask_rom/mask_rom_start.S b/sw/device/silicon_creator/mask_rom/mask_rom_start.S
index ea84020..7093d25 100644
--- a/sw/device/silicon_creator/mask_rom/mask_rom_start.S
+++ b/sw/device/silicon_creator/mask_rom/mask_rom_start.S
@@ -3,9 +3,12 @@
 // SPDX-License-Identifier: Apache-2.0
 
 #include "hw/top_earlgrey/sw/autogen/top_earlgrey_memory.h"
-#include "entropy_src_regs.h"
+#include "ast_regs.h"
 #include "csrng_regs.h"
 #include "edn_regs.h"
+#include "entropy_src_regs.h"
+#include "otp_ctrl_regs.h"
+#include "sensor_ctrl_regs.h"
 #include "sram_ctrl_regs.h"
 
 /**
@@ -131,6 +134,22 @@
   li   t0, 0xFFFF0888
   csrc mie, t0
 
+  // Copy the AST configuration from OTP.
+  li   a0, (TOP_EARLGREY_AST_BASE_ADDR + AST_REGA_0_REG_OFFSET)
+  li   a1, (TOP_EARLGREY_AST_BASE_ADDR + AST_REGAL_REG_OFFSET + 4)
+  li   a2, (TOP_EARLGREY_OTP_CTRL_CORE_BASE_ADDR + \
+            OTP_CTRL_SW_CFG_WINDOW_REG_OFFSET + \
+            OTP_CTRL_PARAM_CREATOR_SW_CFG_AST_CFG_OFFSET)
+  call crt_section_copy
+
+  // Wait for AST initialization to complete.
+  li   a0, TOP_EARLGREY_SENSOR_CTRL_BASE_ADDR
+.L_ast_done_loop:
+  lw   t0, SENSOR_CTRL_STATUS_REG_OFFSET(a0)
+  srli t0, t0, SENSOR_CTRL_STATUS_AST_INIT_DONE_BIT // no-op as bit index is currently 0
+  andi t0, t0, 0x1
+  beqz t0, .L_ast_done_loop
+
   // The following sequence enables the minimum level of entropy required to
   // initialize memory scrambling, as well as the entropy distribution network.
   li a0, TOP_EARLGREY_ENTROPY_SRC_BASE_ADDR
diff --git a/sw/device/silicon_creator/mask_rom/meson.build b/sw/device/silicon_creator/mask_rom/meson.build
index ffdcb4b..fa36a7d 100644
--- a/sw/device/silicon_creator/mask_rom/meson.build
+++ b/sw/device/silicon_creator/mask_rom/meson.build
@@ -62,11 +62,13 @@
 mask_rom_epmp_test_lib = declare_dependency(
   sources: [
     hw_ip_aon_timer_reg_h,
-    hw_ip_entropy_src_reg_h,
+    hw_ip_ast_reg_h,
     hw_ip_csrng_reg_h,
     hw_ip_edn_reg_h,
+    hw_ip_entropy_src_reg_h,
+    hw_ip_otp_ctrl_reg_h,
+    hw_ip_sensor_ctrl_reg_h,
     hw_ip_sram_ctrl_reg_h,
-    hw_ip_pwrmgr_reg_h,
     'mask_rom_start.S',
   ],
   link_args: rom_link_args,
@@ -183,9 +185,12 @@
 mask_rom_lib = declare_dependency(
   sources: [
     hw_ip_aon_timer_reg_h,
-    hw_ip_entropy_src_reg_h,
+    hw_ip_ast_reg_h,
     hw_ip_csrng_reg_h,
     hw_ip_edn_reg_h,
+    hw_ip_entropy_src_reg_h,
+    hw_ip_otp_ctrl_reg_h,
+    hw_ip_sensor_ctrl_reg_h,
     hw_ip_sram_ctrl_reg_h,
     'mask_rom_start.S',
   ],