[nrf fromtree] soc: nordic: uicr: Add support for UICR.SECONDARY.PROTECTEDMEM

Add support for UICR.SECONDARY.PROTECTEDMEM configuration, which enables
configuration of the protected memory region for secondary firmware.

This introduces Kconfig options for configuring:
- GEN_UICR_SECONDARY_PROTECTEDMEM - Enable/disable protected memory
  for secondary firmware
- GEN_UICR_SECONDARY_PROTECTEDMEM_SIZE_BYTES - Size of the protected
  memory region in bytes

The implementation validates that the configured size is divisible by
4096 bytes (4 KiB) as required by the hardware, and converts it to
4 KiB units when writing to UICR.SECONDARY.PROTECTEDMEM.SIZE4KB.

Signed-off-by: Sebastian Bøe <[email protected]>
(cherry picked from commit c3f6b8c)

Author: SebastianBoe

scripts/ci/check_compliance.py

@@ -1356,6 +1356,8 @@ def check_no_undef_outside_kconfig(self, kconf):
         "GEN_UICR_SECONDARY",
         "GEN_UICR_SECONDARY_GENERATE_PERIPHCONF",
         "GEN_UICR_SECONDARY_PROCESSOR_VALUE",
+        "GEN_UICR_SECONDARY_PROTECTEDMEM",
+        "GEN_UICR_SECONDARY_PROTECTEDMEM_SIZE_BYTES",
         "GEN_UICR_SECONDARY_TRIGGER",
         "GEN_UICR_SECONDARY_TRIGGER_APPLICATIONLOCKUP",
         "GEN_UICR_SECONDARY_TRIGGER_APPLICATIONWDT0",

soc/nordic/common/uicr/gen_uicr.py

@@ -501,6 +501,12 @@ def main() -> None:
             "(decimal or 0x-prefixed hex)"
         ),
     )
+    parser.add_argument(
+        "--secondary-protectedmem-size",
+        default=None,
+        type=lambda s: int(s, 0),
+        help="Size in bytes of the secondary protected memory region (decimal or 0x-prefixed hex)",
+    )
     parser.add_argument(
         "--secondary-periphconf-address",
         default=None,
@@ -647,6 +653,15 @@ def main() -> None:
                 uicr.SECONDARY.TRIGGER.ENABLE = ENABLED_VALUE
                 uicr.SECONDARY.TRIGGER.RESETREAS = args.secondary_trigger_resetreas
 
+            # Handle secondary PROTECTEDMEM configuration
+            if args.secondary_protectedmem_size:
+                uicr.SECONDARY.PROTECTEDMEM.ENABLE = ENABLED_VALUE
+                if args.secondary_protectedmem_size % 4096 != 0:
+                    raise ScriptError(
+                        f"args.secondary_protectedmem_size was {args.secondary_protectedmem_size}, "
+                        f"but must be divisible by 4096"
+                    )
+                uicr.SECONDARY.PROTECTEDMEM.SIZE4KB = args.secondary_protectedmem_size // 4096
             # Handle secondary periphconf if provided
             if args.out_secondary_periphconf_hex:
                 secondary_periphconf_combined = extract_and_combine_periphconfs(

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

@@ -216,6 +216,11 @@ if(CONFIG_GEN_UICR_SECONDARY)
     list(APPEND secondary_args --secondary-trigger-resetreas ${resetreas_value})
   endif()
 
+  # Handle secondary PROTECTEDMEM configuration
+  if(CONFIG_GEN_UICR_SECONDARY_PROTECTEDMEM)
+    list(APPEND secondary_args --secondary-protectedmem-size ${CONFIG_GEN_UICR_SECONDARY_PROTECTEDMEM_SIZE_BYTES})
+  endif()
+
   if(CONFIG_GEN_UICR_SECONDARY_GENERATE_PERIPHCONF)
     # Compute SECONDARY_PERIPHCONF absolute address and size from this image's devicetree
     compute_partition_address_and_size("secondary_periphconf_partition" SECONDARY_PERIPHCONF_ADDRESS SECONDARY_PERIPHCONF_SIZE)

soc/nordic/common/uicr/gen_uicr/Kconfig

@@ -207,9 +207,23 @@ config GEN_UICR_SECONDARY_TRIGGER_RADIOCORELOCKUP
 	help
 	  Boot secondary firmware when Radio core CPU lockup causes a reset.
 
-
 endif # GEN_UICR_SECONDARY_TRIGGER
 
+config GEN_UICR_SECONDARY_PROTECTEDMEM
+	bool "Enable UICR.SECONDARY.PROTECTEDMEM"
+	depends on GEN_UICR_SECONDARY
+	help
+	  When enabled, the UICR generator will configure the
+	  protected memory region for the secondary firmware.
+
+config GEN_UICR_SECONDARY_PROTECTEDMEM_SIZE_BYTES
+	int "Secondary protected memory size in bytes"
+	default 4096
+	depends on GEN_UICR_SECONDARY_PROTECTEDMEM
+	help
+	  Size of the secondary protected memory region in bytes.
+	  This value must be divisible by 4096 (4 kiB).
+
 endif # GEN_UICR_SECONDARY
 
 endmenu