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History

Francois Ramu 45ce78adf0 samples: code_relocation_nocopy: update macro for flash size and address In case of the st,stm32-qspi-nor compatible new property and node definitions will requires new macro to get the external NOR flash base address and size Add the config for running the sample on stm32l475 disco kit Signed-off-by: Francois Ramu <francois.ramu@st.com>		2025-06-24 09:13:33 +02:00
..
boards	samples: code_relocation_nocopy: update macro for flash size and address	2025-06-24 09:13:33 +02:00
src
CMakeLists.txt
linker_arm_nocopy.ld	samples: code_relocation_nocopy: update macro for flash size and address	2025-06-24 09:13:33 +02:00
prj.conf
README.rst
sample.yaml	tests: fix various test ids and use existing scheme	2025-04-07 11:22:36 +02:00

README.rst

.. zephyr:code-sample:: code_relocation_nocopy
   :name: Code relocation nocopy

   Relocate code, data, or bss sections using a custom linker script.

Overview
********
A simple example that demonstrates how relocation of code, data or bss sections
using a custom linker script.

Differently from the code relocation sample, this sample is relocating the
content of the ext_code.c file to a different FLASH section and the code is XIP
directly from there without the need to copy / relocate the code. All other code
(e.g. main(), Zephyr kernel) stays in the internal flash.

nRF5340 DK platform instructions
********************************

The nRF5340 DK has a 64 Mb external flash memory supporting Quad SPI. It is
mapped to 0x10000000.

To build and flash the application (including the external memory part):

.. zephyr-app-commands::
   :zephyr-app: samples/application_development/code_relocation_nocopy
   :board: nrf5340dk/nrf5340/cpuapp
   :goals: build flash
   :compact:

STM32F769I-Discovery platform instructions
******************************************

The stm32f769i_disco has 64MB of external flash attached via QSPI. It is mapped
to 0x90000000.

.. zephyr-app-commands::
   :zephyr-app: samples/application_development/code_relocation_nocopy
   :board: stm32f769i_disco
   :goals: build flash
   :compact:

STM32 b_u585i_iot02a Discovery kit instructions
***********************************************

The b_u585i_iot02a has 64MB of external flash attached via OSPI. It is mapped
to 0x70000000.

.. zephyr-app-commands::
   :zephyr-app: samples/application_development/code_relocation_nocopy
   :board: b_u585i_iot02a
   :goals: build flash
   :compact:

Execution output
****************

.. code-block:: console

  *** Booting Zephyr OS build v3.0.0-rc3-25-g0df32cec1ff2  ***
  Address of main function 0x4f9
  Address of function_in_ext_flash 0x10000001
  Address of var_ext_sram_data 0x200000a0 (10)
  Address of function_in_sram 0x20000001
  Address of var_sram_data 0x200000a4 (10)
  Hello World! nrf5340dk/nrf5340/cpuapp