diff --git a/sw/device/silicon_creator/imm_rom_ext/BUILD b/sw/device/silicon_creator/imm_rom_ext/BUILD
index 094d5c8601b4b..a55fefff49c26 100644
--- a/sw/device/silicon_creator/imm_rom_ext/BUILD
+++ b/sw/device/silicon_creator/imm_rom_ext/BUILD
@@ -17,8 +17,8 @@ package(default_visibility = ["//visibility:public"])
 cc_library(
     name = "main_lib",
     srcs = [
-        "hello_world_start.S",
         "imm_rom_ext.c",
+        "imm_rom_ext_start.S",
     ],
     hdrs = ["imm_rom_ext.h"],
     target_compatible_with = [OPENTITAN_CPU],
@@ -60,14 +60,51 @@ cc_library(
     ],
 )
 
+ld_library(
+    name = "ld_common",
+    includes = ["imm_rom_ext_common.ld"],
+    deps = [
+        "//hw/top_earlgrey/sw/autogen:top_earlgrey_memory",
+        "//sw/device:info_sections",
+        "//sw/device/silicon_creator/lib/base:static_critical_sections",
+    ],
+)
+
+ld_library(
+    name = "ld_slot_a",
+    script = "imm_rom_ext_slot_a.ld",
+    deps = [
+        ":ld_common",
+        "//hw/top_earlgrey/sw/autogen:top_earlgrey_memory",
+    ],
+)
+
+ld_library(
+    name = "ld_slot_b",
+    script = "imm_rom_ext_slot_b.ld",
+    deps = [
+        ":ld_common",
+        "//hw/top_earlgrey/sw/autogen:top_earlgrey_memory",
+    ],
+)
+
+ld_library(
+    name = "ld_slot_virtual",
+    script = "imm_rom_ext_slot_virtual.ld",
+    deps = [
+        ":ld_common",
+        "//hw/top_earlgrey/sw/autogen:top_earlgrey_memory",
+    ],
+)
+
 opentitan_binary(
-    name = "main_binaries",
+    name = "main_binaries_slot_a",
     exec_env = DEFAULT_EXEC_ENV,
     extra_bazel_features = [
         "minsize",
         "use_lld",
     ],
-    linker_script = ":ld_hello_world",
+    linker_script = ":ld_slot_a",
     manifest = "//hw/top_earlgrey:none_manifest",
     deps = [
         ":main_lib",
@@ -77,45 +114,57 @@ opentitan_binary(
 
 [
     create_imm_rom_ext_targets(
-        src = ":main_binaries",
-        base_name = "main_section",
+        src = ":main_binaries_slot_a",
+        base_name = "main_section_slot_a",
         exec_env = env,
     )
     for env in DEFAULT_EXEC_ENV
 ]
 
-ld_library(
-    name = "ld_hello_world",
-    script = "hello_world.ld",
-    deps = [
-        "//hw/top_earlgrey/sw/autogen:top_earlgrey_memory",
-        "//sw/device:info_sections",
-        "//sw/device/silicon_creator/lib/base:static_critical_sections",
-    ],
-)
-
-cc_library(
-    name = "hello_world",
-    srcs = [
-        "hello_world.c",
-        "hello_world_start.S",
+opentitan_binary(
+    name = "main_binaries_slot_b",
+    exec_env = DEFAULT_EXEC_ENV,
+    extra_bazel_features = [
+        "minsize",
+        "use_lld",
     ],
-    hdrs = ["hello_world.h"],
-    target_compatible_with = [OPENTITAN_CPU],
+    linker_script = ":ld_slot_b",
+    manifest = "//hw/top_earlgrey:none_manifest",
     deps = [
-        "//sw/device/silicon_creator/lib/base:static_critical",
-        "//sw/device/silicon_creator/lib/drivers:uart",
+        ":main_lib",
+        "//sw/device/lib/crt",
     ],
 )
 
+[
+    create_imm_rom_ext_targets(
+        src = ":main_binaries_slot_b",
+        base_name = "main_section_slot_b",
+        exec_env = env,
+    )
+    for env in DEFAULT_EXEC_ENV
+]
+
 opentitan_binary(
-    name = "hello_world_binaries",
-    exec_env = [
-        "//hw/top_earlgrey:fpga_cw340",
+    name = "main_binaries_slot_virtual",
+    exec_env = DEFAULT_EXEC_ENV,
+    extra_bazel_features = [
+        "minsize",
+        "use_lld",
     ],
-    linker_script = ":ld_hello_world",
+    linker_script = ":ld_slot_virtual",
+    manifest = "//hw/top_earlgrey:none_manifest",
     deps = [
-        ":hello_world",
+        ":main_lib",
         "//sw/device/lib/crt",
     ],
 )
+
+[
+    create_imm_rom_ext_targets(
+        src = ":main_binaries_slot_virtual",
+        base_name = "main_section_slot_virtual",
+        exec_env = env,
+    )
+    for env in DEFAULT_EXEC_ENV
+]
diff --git a/sw/device/silicon_creator/imm_rom_ext/defs.bzl b/sw/device/silicon_creator/imm_rom_ext/defs.bzl
index d161d36148a80..01d2937c42a5b 100644
--- a/sw/device/silicon_creator/imm_rom_ext/defs.bzl
+++ b/sw/device/silicon_creator/imm_rom_ext/defs.bzl
@@ -11,12 +11,32 @@ DEFAULT_EXEC_ENV = [
 ]
 
 # The target list should contian prebuilt artifacts and run-time build targets.
-IMM_ROM_EXT_SECTIONS = {
+SLOT_A_IMM_ROM_EXT_SECTIONS = {
     "main": [
-        "//sw/device/silicon_creator/imm_rom_ext:main_section_fpga_cw310",
-        "//sw/device/silicon_creator/imm_rom_ext:main_section_fpga_cw340",
-        "//sw/device/silicon_creator/imm_rom_ext:main_section_sim_dv_base",
-        "//sw/device/silicon_creator/imm_rom_ext:main_section_sim_verilator_base",
-        "//sw/device/silicon_creator/imm_rom_ext:main_section_silicon_creator",
+        "//sw/device/silicon_creator/imm_rom_ext:main_section_slot_a_fpga_cw310",
+        "//sw/device/silicon_creator/imm_rom_ext:main_section_slot_a_fpga_cw340",
+        "//sw/device/silicon_creator/imm_rom_ext:main_section_slot_a_sim_dv_base",
+        "//sw/device/silicon_creator/imm_rom_ext:main_section_slot_a_sim_verilator_base",
+        "//sw/device/silicon_creator/imm_rom_ext:main_section_slot_a_silicon_creator",
+    ],
+}
+
+SLOT_B_IMM_ROM_EXT_SECTIONS = {
+    "main": [
+        "//sw/device/silicon_creator/imm_rom_ext:main_section_slot_b_fpga_cw310",
+        "//sw/device/silicon_creator/imm_rom_ext:main_section_slot_b_fpga_cw340",
+        "//sw/device/silicon_creator/imm_rom_ext:main_section_slot_b_sim_dv_base",
+        "//sw/device/silicon_creator/imm_rom_ext:main_section_slot_b_sim_verilator_base",
+        "//sw/device/silicon_creator/imm_rom_ext:main_section_slot_b_silicon_creator",
+    ],
+}
+
+SLOT_VIRTUAL_IMM_ROM_EXT_SECTIONS = {
+    "main": [
+        "//sw/device/silicon_creator/imm_rom_ext:main_section_slot_virtual_fpga_cw310",
+        "//sw/device/silicon_creator/imm_rom_ext:main_section_slot_virtual_fpga_cw340",
+        "//sw/device/silicon_creator/imm_rom_ext:main_section_slot_virtual_sim_dv_base",
+        "//sw/device/silicon_creator/imm_rom_ext:main_section_slot_virtual_sim_verilator_base",
+        "//sw/device/silicon_creator/imm_rom_ext:main_section_slot_virtual_silicon_creator",
     ],
 }
diff --git a/sw/device/silicon_creator/imm_rom_ext/hello_world.c b/sw/device/silicon_creator/imm_rom_ext/hello_world.c
deleted file mode 100644
index 00644725ca268..0000000000000
--- a/sw/device/silicon_creator/imm_rom_ext/hello_world.c
+++ /dev/null
@@ -1,37 +0,0 @@
-// Copyright lowRISC contributors (OpenTitan project).
-// Licensed under the Apache License, Version 2.0, see LICENSE for details.
-// SPDX-License-Identifier: Apache-2.0
-
-#include "sw/device/silicon_creator/imm_rom_ext/hello_world.h"
-
-#include "sw/device/silicon_creator/lib/drivers/uart.h"
-
-// These arrays are used to "HelloWorld!" to the UART console.
-//                        o l l e H
-uint64_t kArray1[8] = {0x6f6c6c6548};
-// The value will be updated in the main function.
-uint64_t kArray2[8];
-
-void imm_rom_ext_main(void) {
-  // Print "Immutable" to the UART console.
-  //                        l b a t u m m I
-  const uint64_t kStr1 = 0x6c626174756d6d49;
-  //                        : e
-  const uint32_t kStr2 = 0x3a65;
-  const uint32_t kSpace = 0x20;
-  const uint32_t kNewline = 0x0a0d;
-  uart_write_imm(kStr1);
-  uart_write_imm(kStr2);
-  uart_write_imm(kSpace);
-  //               ! d l r o W
-  kArray2[0] += 0x21646c726f57;
-  uart_write_imm(kArray1[0]);  // To test the .data section.
-  uart_write_imm(kArray2[0]);  // To test the .bss section.
-  uart_write_imm(kNewline);
-
-  // Wait until the UART is done transmitting.
-  while (!uart_tx_idle()) {
-  }
-
-  return;
-}
diff --git a/sw/device/silicon_creator/imm_rom_ext/hello_world.h b/sw/device/silicon_creator/imm_rom_ext/hello_world.h
deleted file mode 100644
index 2932989cb8e76..0000000000000
--- a/sw/device/silicon_creator/imm_rom_ext/hello_world.h
+++ /dev/null
@@ -1,18 +0,0 @@
-// Copyright lowRISC contributors (OpenTitan project).
-// Licensed under the Apache License, Version 2.0, see LICENSE for details.
-// SPDX-License-Identifier: Apache-2.0
-
-#ifndef OPENTITAN_SW_DEVICE_SILICON_CREATOR_IMM_ROM_EXT_HELLO_WORLD_H_
-#define OPENTITAN_SW_DEVICE_SILICON_CREATOR_IMM_ROM_EXT_HELLO_WORLD_H_
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-void imm_rom_ext_main(void);
-
-#ifdef __cplusplus
-}  // extern "C"
-#endif
-
-#endif  // OPENTITAN_SW_DEVICE_SILICON_CREATOR_IMM_ROM_EXT_HELLO_WORLD_H_
diff --git a/sw/device/silicon_creator/imm_rom_ext/hello_world.ld b/sw/device/silicon_creator/imm_rom_ext/imm_rom_ext_common.ld
similarity index 92%
rename from sw/device/silicon_creator/imm_rom_ext/hello_world.ld
rename to sw/device/silicon_creator/imm_rom_ext/imm_rom_ext_common.ld
index 6c45899b02531..03731afd856fd 100644
--- a/sw/device/silicon_creator/imm_rom_ext/hello_world.ld
+++ b/sw/device/silicon_creator/imm_rom_ext/imm_rom_ext_common.ld
@@ -7,18 +7,6 @@
  * script only works for hello-world IMM_ROM_EXT.
  */
 
-INCLUDE hw/top_earlgrey/sw/autogen/top_earlgrey_memory.ld
-
-/**
- * Symbols to be used in the setup of the address translation for IMM_ROM_EXT.
- */
-
-MEMORY {
-  imm_rom_ext_virtual(rx) : ORIGIN = ORIGIN(rom_ext_virtual) + 0x400, LENGTH = 0x80000 - 0x400
-}
-
-REGION_ALIAS("rom_ext_flash", imm_rom_ext_virtual);
-
 OUTPUT_ARCH(riscv)
 
 /**
diff --git a/sw/device/silicon_creator/imm_rom_ext/imm_rom_ext_slot_a.ld b/sw/device/silicon_creator/imm_rom_ext/imm_rom_ext_slot_a.ld
new file mode 100644
index 0000000000000..e7751d59bf4fc
--- /dev/null
+++ b/sw/device/silicon_creator/imm_rom_ext/imm_rom_ext_slot_a.ld
@@ -0,0 +1,27 @@
+/* Copyright lowRISC contributors (OpenTitan project). */
+/* Licensed under the Apache License, Version 2.0, see LICENSE for details. */
+/* SPDX-License-Identifier: Apache-2.0 */
+
+/**
+ * Linker script for an OpenTitan IMM_ROM_EXT.
+ *
+ * Portions of this file are Ibex-specific.
+ *
+ * The IMM_ROM_EXT is kept in the .rom_ext_immutable section in ROM, after the
+ * .manifest section. This linker script targets to use slot A address, and
+ * the addresses are similar to the linker script rom_ext_slot_a.ld that ROM_EXT
+ * is using.
+ */
+
+INCLUDE hw/top_earlgrey/sw/autogen/top_earlgrey_memory.ld
+
+/**
+ * Symbols to be used in the setup of the address translation for IMM_ROM_EXT.
+ */
+
+MEMORY {
+  imm_rom_ext_slot_a(rx) : ORIGIN = ORIGIN(eflash) + 0x400, LENGTH = LENGTH(eflash) / 2 - 0x400
+}
+REGION_ALIAS("rom_ext_flash", imm_rom_ext_slot_a);
+
+INCLUDE sw/device/silicon_creator/imm_rom_ext/imm_rom_ext_common.ld
diff --git a/sw/device/silicon_creator/imm_rom_ext/imm_rom_ext_slot_b.ld b/sw/device/silicon_creator/imm_rom_ext/imm_rom_ext_slot_b.ld
new file mode 100644
index 0000000000000..35540731a9888
--- /dev/null
+++ b/sw/device/silicon_creator/imm_rom_ext/imm_rom_ext_slot_b.ld
@@ -0,0 +1,28 @@
+/* Copyright lowRISC contributors (OpenTitan project). */
+/* Licensed under the Apache License, Version 2.0, see LICENSE for details. */
+/* SPDX-License-Identifier: Apache-2.0 */
+
+/**
+ * Linker script for an OpenTitan IMM_ROM_EXT.
+ *
+ * Portions of this file are Ibex-specific.
+ *
+ * The IMM_ROM_EXT is kept in the .rom_ext_immutable section in ROM, after the
+ * .manifest section. This linker script targets to use slot B address, and
+ * the addresses are similar to the linker script rom_ext_slot_b.ld that ROM_EXT
+ * is using.
+ */
+
+INCLUDE hw/top_earlgrey/sw/autogen/top_earlgrey_memory.ld
+
+/**
+ * Symbols to be used in the setup of the address translation for IMM_ROM_EXT.
+ */
+
+/* Slot B starts at the half-size mark of the eFlash. */
+MEMORY {
+  imm_rom_ext_slot_b(rx) : ORIGIN = ORIGIN(eflash) + LENGTH(eflash) / 2 + 0x400, LENGTH = LENGTH(eflash) / 2 - 0x400
+}
+REGION_ALIAS("rom_ext_flash", imm_rom_ext_slot_b);
+
+INCLUDE sw/device/silicon_creator/imm_rom_ext/imm_rom_ext_common.ld
diff --git a/sw/device/silicon_creator/imm_rom_ext/imm_rom_ext_slot_virtual.ld b/sw/device/silicon_creator/imm_rom_ext/imm_rom_ext_slot_virtual.ld
new file mode 100644
index 0000000000000..47d3dcd372bfd
--- /dev/null
+++ b/sw/device/silicon_creator/imm_rom_ext/imm_rom_ext_slot_virtual.ld
@@ -0,0 +1,27 @@
+/* Copyright lowRISC contributors (OpenTitan project). */
+/* Licensed under the Apache License, Version 2.0, see LICENSE for details. */
+/* SPDX-License-Identifier: Apache-2.0 */
+
+/**
+ * Linker script for an OpenTitan IMM_ROM_EXT.
+ *
+ * Portions of this file are Ibex-specific.
+ *
+ * The IMM_ROM_EXT is kept in the .rom_ext_immutable section in ROM, after the
+ * .manifest section. This linker script targets to use virtual address, and
+ * the addresses are similar to the linker script rom_ext_slot_virtual.ld that
+ * ROM_EXT is using.
+ */
+
+INCLUDE hw/top_earlgrey/sw/autogen/top_earlgrey_memory.ld
+
+/**
+ * Symbols to be used in the setup of the address translation for IMM_ROM_EXT.
+ */
+
+MEMORY {
+  imm_rom_ext_virtual(rx) : ORIGIN = ORIGIN(rom_ext_virtual) + 0x400, LENGTH = 0x80000 - 0x400
+}
+REGION_ALIAS("rom_ext_flash", imm_rom_ext_virtual);
+
+INCLUDE sw/device/silicon_creator/imm_rom_ext/imm_rom_ext_common.ld
diff --git a/sw/device/silicon_creator/imm_rom_ext/hello_world_start.S b/sw/device/silicon_creator/imm_rom_ext/imm_rom_ext_start.S
similarity index 100%
rename from sw/device/silicon_creator/imm_rom_ext/hello_world_start.S
rename to sw/device/silicon_creator/imm_rom_ext/imm_rom_ext_start.S
diff --git a/sw/device/silicon_creator/rom_ext/BUILD b/sw/device/silicon_creator/rom_ext/BUILD
index 292cb74d2ed52..1e145f06a9279 100644
--- a/sw/device/silicon_creator/rom_ext/BUILD
+++ b/sw/device/silicon_creator/rom_ext/BUILD
@@ -14,7 +14,9 @@ load(
 )
 load(
     "//sw/device/silicon_creator/imm_rom_ext:defs.bzl",
-    "IMM_ROM_EXT_SECTIONS",
+    "SLOT_A_IMM_ROM_EXT_SECTIONS",
+    "SLOT_B_IMM_ROM_EXT_SECTIONS",
+    "SLOT_VIRTUAL_IMM_ROM_EXT_SECTIONS",
 )
 
 package(default_visibility = ["//visibility:public"])
@@ -290,7 +292,7 @@ opentitan_binary(
         "minsize",
         "use_lld",
     ],
-    immutable_rom_ext_sections = IMM_ROM_EXT_SECTIONS["main"],
+    immutable_rom_ext_sections = SLOT_A_IMM_ROM_EXT_SECTIONS["main"],
     linker_script = ":ld_slot_a",
     manifest = ":manifest",
     spx_key = {"//sw/device/silicon_creator/rom/keys/fake/spx:prod_key_0_spx": "prod_key_0"},
@@ -319,7 +321,7 @@ opentitan_binary(
         "minsize",
         "use_lld",
     ],
-    immutable_rom_ext_sections = IMM_ROM_EXT_SECTIONS["main"],
+    immutable_rom_ext_sections = SLOT_B_IMM_ROM_EXT_SECTIONS["main"],
     linker_script = ":ld_slot_b",
     manifest = ":manifest",
     spx_key = {"//sw/device/silicon_creator/rom/keys/fake/spx:prod_key_0_spx": "prod_key_0"},
@@ -348,7 +350,7 @@ opentitan_binary(
         "minsize",
         "use_lld",
     ],
-    immutable_rom_ext_sections = IMM_ROM_EXT_SECTIONS["main"],
+    immutable_rom_ext_sections = SLOT_VIRTUAL_IMM_ROM_EXT_SECTIONS["main"],
     linker_script = ":ld_slot_virtual",
     manifest = ":manifest",
     deps = [
@@ -387,7 +389,7 @@ opentitan_binary(
             "//sw/device/silicon_creator/lib/ownership/keys/fake",
         ],
     )
-    for name, imm_rom_ext_sections in IMM_ROM_EXT_SECTIONS.items()
+    for name, imm_rom_ext_sections in SLOT_VIRTUAL_IMM_ROM_EXT_SECTIONS.items()
 ]
 
 manifest(d = {
diff --git a/sw/device/silicon_creator/rom_ext/e2e/verified_boot/BUILD b/sw/device/silicon_creator/rom_ext/e2e/verified_boot/BUILD
index ab5070bd28a82..bb69b14a06d69 100644
--- a/sw/device/silicon_creator/rom_ext/e2e/verified_boot/BUILD
+++ b/sw/device/silicon_creator/rom_ext/e2e/verified_boot/BUILD
@@ -23,7 +23,7 @@ load(
 )
 load(
     "//sw/device/silicon_creator/imm_rom_ext:defs.bzl",
-    "IMM_ROM_EXT_SECTIONS",
+    "SLOT_VIRTUAL_IMM_ROM_EXT_SECTIONS",
 )
 
 package(default_visibility = ["//visibility:public"])
@@ -48,7 +48,7 @@ filegroup(
         rom_ext = "//sw/device/silicon_creator/rom_ext:rom_ext_with_{}_imm_slot_virtual".format(name),
         visibility = ["//visibility:private"],
     )
-    for name in IMM_ROM_EXT_SECTIONS
+    for name in SLOT_VIRTUAL_IMM_ROM_EXT_SECTIONS
 ]
 
 [
@@ -62,7 +62,7 @@ filegroup(
         ],
         visibility = ["//visibility:private"],
     )
-    for name in IMM_ROM_EXT_SECTIONS
+    for name in SLOT_VIRTUAL_IMM_ROM_EXT_SECTIONS
 ]
 
 _POSITIONS = {
@@ -139,7 +139,7 @@ _POSITIONS = {
         "success": "rom_ext_slot = AA__\r\n",
         "otp_img": ":otp_img_with_{}_imm_romext_enabled".format(name),
     }
-    for name in IMM_ROM_EXT_SECTIONS
+    for name in SLOT_VIRTUAL_IMM_ROM_EXT_SECTIONS
 }
 
 [
diff --git a/sw/device/silicon_creator/rom_ext/sival/BUILD b/sw/device/silicon_creator/rom_ext/sival/BUILD
index 7db34c0cd79df..ac2a597615e20 100644
--- a/sw/device/silicon_creator/rom_ext/sival/BUILD
+++ b/sw/device/silicon_creator/rom_ext/sival/BUILD
@@ -11,6 +11,11 @@ load(
     "ROM_EXT_VERSION",
 )
 load("@rules_pkg//pkg:tar.bzl", "pkg_tar")
+load(
+    "//sw/device/silicon_creator/imm_rom_ext:defs.bzl",
+    "SLOT_A_IMM_ROM_EXT_SECTIONS",
+    "SLOT_B_IMM_ROM_EXT_SECTIONS",
+)
 
 package(default_visibility = ["//visibility:public"])
 
@@ -49,6 +54,7 @@ opentitan_binary(
         "minsize",
         "use_lld",
     ],
+    immutable_rom_ext_sections = SLOT_A_IMM_ROM_EXT_SECTIONS["main"],
     linker_script = "//sw/device/silicon_creator/rom_ext:ld_slot_a",
     linkopts = LINK_ORDER,
     manifest = ":manifest_sival",
@@ -75,6 +81,7 @@ opentitan_binary(
         "minsize",
         "use_lld",
     ],
+    immutable_rom_ext_sections = SLOT_B_IMM_ROM_EXT_SECTIONS["main"],
     linker_script = "//sw/device/silicon_creator/rom_ext:ld_slot_b",
     linkopts = LINK_ORDER,
     manifest = ":manifest_sival",
@@ -97,6 +104,7 @@ opentitan_binary(
         "minsize",
         "use_lld",
     ],
+    immutable_rom_ext_sections = SLOT_A_IMM_ROM_EXT_SECTIONS["main"],
     linker_script = "//sw/device/silicon_creator/rom_ext:ld_slot_a",
     linkopts = LINK_ORDER,
     deps = [
@@ -117,6 +125,7 @@ opentitan_binary(
         "minsize",
         "use_lld",
     ],
+    immutable_rom_ext_sections = SLOT_B_IMM_ROM_EXT_SECTIONS["main"],
     linker_script = "//sw/device/silicon_creator/rom_ext:ld_slot_b",
     linkopts = LINK_ORDER,
     deps = [