arch: move CODE_DATA_RELOCATION to top level

Support for CODE_DATA_RELOCATION is not inherently limited to ARM, so
move the Kconfig definition to top-level so it can be used by other
architectures. Since support is opt-in (requiring linker script
support), add a helper symbol enabled by architecture config that gates
whether CODE_DATA_RELOCATION is available instead of listing all
supported systems inline.

Signed-off-by: Peter Marheine <[email protected]>

Author: tari

arch/Kconfig

@@ -577,6 +577,12 @@ config ARCH_HAS_SUSPEND_TO_RAM
 config ARCH_HAS_THREAD_ABORT
 	bool
 
+config ARCH_HAS_CODE_DATA_RELOCATION
+	bool
+	help
+	  When selected, the architecture/SoC implements support for
+	  CODE_DATA_RELOCATION in its linker scripts.
+
 #
 # Hidden CPU family configs
 #
@@ -755,6 +761,15 @@ config SRAM_REGION_PERMISSIONS
 	  paging, do not need memory protection, and would rather not use up
 	  RAM for the alignment between regions.
 
+config CODE_DATA_RELOCATION
+	bool "Support code/data section relocation"
+	depends on ARCH_HAS_CODE_DATA_RELOCATION
+	help
+	  Enable support for relocating .text, data and .bss sections from specified
+	  files and placing them in a chosen memory region. Files to relocate and
+	  the target regions should be specified in CMakeLists.txt using
+	  zephyr_code_relocate().
+
 menu "Floating Point Options"
 
 config FPU

arch/arm/Kconfig

@@ -34,15 +34,6 @@ config ARM_CUSTOM_INTERRUPT_CONTROLLER
 	       family cores. The Cortex-M family cores are always equipped with
 	       the ARM Nested Vectored Interrupt Controller (NVIC).
 
-config CODE_DATA_RELOCATION
-	bool "Relocate code/data sections"
-	depends on CPU_CORTEX_M || CPU_AARCH32_CORTEX_R
-	help
-	  When selected this will relocate .text, data and .bss sections from
-	  the specified files and places it in the required memory region. The
-	  files should be specified in the CMakeList.txt file with
-	  a cmake API zephyr_code_relocate().
-
 config CODE_DATA_RELOCATION_SRAM
 	bool "Relocate code/data sections to SRAM"
 	depends on CPU_CORTEX_M

arch/arm/core/aarch32/Kconfig

@@ -22,6 +22,7 @@ config CPU_CORTEX_M
 	select ARCH_HAS_TIMING_FUNCTIONS if CPU_CORTEX_M_HAS_DWT
 	select ARCH_SUPPORTS_ARCH_HW_INIT
 	select ARCH_HAS_SUSPEND_TO_RAM
+	select ARCH_HAS_CODE_DATA_RELOCATION
 	imply XIP
 	help
 	  This option signifies the use of a CPU of the Cortex-M family.
@@ -34,6 +35,7 @@ config CPU_AARCH32_CORTEX_R
 	select HAS_FLASH_LOAD_OFFSET
 	select ARCH_HAS_USERSPACE if ARM_MPU
 	select ARCH_HAS_EXTRA_EXCEPTION_INFO
+	select ARCH_HAS_CODE_DATA_RELOCATION
 	help
 	  This option signifies the use of a CPU of the Cortex-R family.