xtensa: move soc to top-level dir soc/

set_property(GLOBAL PROPERTY PROPERTY_OUTPUT_FORMAT elf32-xtensa-le)

if(SOC_FAMILY)

  add_subdirectory(soc/${SOC_FAMILY})

else()

  add_subdirectory(soc/${SOC_PATH})

endif()

add_subdirectory(core)

choice

	prompt "XTENSA core Selection"

	depends on XTENSA

	source "arch/xtensa/soc/*/Kconfig.soc"

	source "soc/xtensa/*/Kconfig.soc"

endchoice

menu "XTENSA Options"

# overriden (by defining symbols in multiple locations)

#

# (No SoC-specific Kconfig files as of writing, hence the optional source.)

osource "arch/xtensa/soc/*/Kconfig"

osource "soc/xtensa/*/Kconfig"

config IRQ_OFFLOAD_INTNUM

	int "IRQ offload SW interrupt index"

.. code-block:: console

    $ XTENSA_CORE=myCore

    $ $(which echo) -e "config ${XTENSA_CORE}\n\tbool \"${XTENSA_CORE} core\"\n" >> "arch/xtensa/soc/Kconfig.cores"

    $ $(which echo) -e "config ${XTENSA_CORE}\n\tbool \"${XTENSA_CORE} core\"\n" >> "soc/xtensa/Kconfig.cores"

Create a folder for that core:

.. code-block:: console

    $ mkdir arch/xtensa/soc/${XTENSA_CORE}

    $ mkdir soc/xtensa/${XTENSA_CORE}

Create and copy to that folder a custom linker script (more on linker script in next section):

.. code-block:: console

    $ cp  linker.ld  arch/xtensa/soc/${XTENSA_CORE}/linker.ld

    $ cp  linker.ld  soc/xtensa/${XTENSA_CORE}/linker.ld

Add a Makefile:

.. code-block:: console

    $ echo "obj-y = soc.o" > arch/xtensa/soc/${XTENSA_CORE}/Makefile

    $ echo "obj-y = soc.o" > soc/xtensa/${XTENSA_CORE}/Makefile

Add Zephyr specific sections to the linker script.

The file "arch/xtensa/soc/linker_more.ld" contains Zephyr-specific linker

The file "soc/xtensa/linker_more.ld" contains Zephyr-specific linker

sections that should be added to the default linker script linker.ld (inside

SECTIONS region). If you are not using a linker script, you must create one

and add these sections. The memory segment and PHDR should be replaced by

appropriate values. See :file:`arch/xtensa/soc/hifi3_bd5/linker.ld` for an example.

appropriate values. See :file:`soc/xtensa/hifi3_bd5/linker.ld` for an example.

The linker script should be named ``linker.ld`` and placed in the directory

``arch/xtensa/soc/${XTENSA_CORE}``.

``soc/xtensa/${XTENSA_CORE}``.

Configuring build

=================