[nrf fromtree] soc: nordic: Add snapshot region support in UICR

Add snapshot region support in UICR.

Signed-off-by: Sebastian Bøe <sebastian.boe@nordicsemi.no>
(cherry picked from commit 28dfa43)

Author: SebastianBoe

soc/nordic/common/uicr/Kconfig.gen_uicr

@@ -404,4 +404,36 @@ config GEN_UICR_POLICY_MPCCONF_STAGE_VALUE
 	default 0x1730C77F if GEN_UICR_POLICY_MPCCONF_STAGE_NORMAL
 	default 0
 
+config GEN_UICR_SNAPSHOT_REGIONS
+	bool "UICR.SNAPSHOT.REGIONS"
+	depends on SOC_SERIES_NRF54H
+	help
+	  When enabled, the UICR generator will configure the snapshot regions
+	  specified in Kconfig.
+
+if GEN_UICR_SNAPSHOT_REGIONS
+
+index = 0
+rsource "Kconfig.template.gen_uicr_snapshot_region"
+
+index = 1
+rsource "Kconfig.template.gen_uicr_snapshot_region"
+
+index = 2
+rsource "Kconfig.template.gen_uicr_snapshot_region"
+
+index = 3
+rsource "Kconfig.template.gen_uicr_snapshot_region"
+
+index = 4
+rsource "Kconfig.template.gen_uicr_snapshot_region"
+
+index = 5
+rsource "Kconfig.template.gen_uicr_snapshot_region"
+
+index = 6
+rsource "Kconfig.template.gen_uicr_snapshot_region"
+
+endif # GEN_UICR_SNAPSHOT_REGIONS
+
 endmenu

soc/nordic/common/uicr/Kconfig.template.gen_uicr_snapshot_region

@@ -0,0 +1,22 @@
+# Copyright (c) 2026 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+config GEN_UICR_SNAPSHOT_REGION_$(index)
+	bool "UICR.SNAPSHOT region"
+	depends on GEN_UICR_SNAPSHOT_REGIONS
+	help
+	  When enabled, configures a UICR.SNAPSHOT region.
+
+config GEN_UICR_SNAPSHOT_REGION_$(index)_ADDRESS
+	hex "UICR.SNAPSHOT region start address"
+	range 0x0e030000 0x0e1ff000
+	depends on GEN_UICR_SNAPSHOT_REGION_$(index)
+	help
+	  UICR.SNAPSHOT region start address. Must be aligned to a 1 KB boundary.
+
+config GEN_UICR_SNAPSHOT_REGION_$(index)_SIZE_BYTES
+	int "UICR.SNAPSHOT region size in bytes"
+	range 1024 1048576
+	depends on GEN_UICR_SNAPSHOT_REGION_$(index)
+	help
+	  Size of the snapshot region in bytes. Must be a multiple of 1024.

soc/nordic/common/uicr/gen_uicr/CMakeLists.txt

@@ -88,6 +88,7 @@ set(eraseprotect_args)
 set(approtect_args)
 set(protectedmem_args)
 set(periphconf_args)
+set(snapshot_args)
 set(mpcconf_args)
 set(wdtstart_args)
 set(periphconf_elfs)
@@ -364,6 +365,19 @@ if(CONFIG_GEN_UICR_POLICY_MPCCONF_STAGE_INIT OR CONFIG_GEN_UICR_POLICY_MPCCONF_S
   list(APPEND policy_args --policy-mpcconf-stage ${CONFIG_GEN_UICR_POLICY_MPCCONF_STAGE_VALUE})
 endif()
 
+# Handle SNAPSHOT configuration (indices 0..6 match Kconfig.template.gen_uicr_snapshot_region)
+if(CONFIG_GEN_UICR_SNAPSHOT_REGIONS)
+  foreach(snapshot_region_idx RANGE 0 6)
+    if(CONFIG_GEN_UICR_SNAPSHOT_REGION_${snapshot_region_idx})
+      list(APPEND snapshot_args
+        --snapshot-region
+        ${CONFIG_GEN_UICR_SNAPSHOT_REGION_${snapshot_region_idx}_ADDRESS}
+        ${CONFIG_GEN_UICR_SNAPSHOT_REGION_${snapshot_region_idx}_SIZE_BYTES}
+      )
+    endif()
+  endforeach()
+endif()
+
 set(periphconf_check_base_cmd
   ${CMAKE_COMMAND} -E env ZEPHYR_BASE=${ZEPHYR_BASE}
   ${PYTHON_EXECUTABLE} ${IRONSIDE_SUPPORT_DIR}/se/tool/ironside/__main__.py
@@ -448,6 +462,7 @@ add_custom_command(
           ${protectedmem_args}
           ${secondary_args}
           ${policy_args}
+          ${snapshot_args}
   ${periphconf_validate_build_command}
   ${secondary_periphconf_validate_build_command}
   DEPENDS ${gen_uicr_depends}