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Joe Cheng 98d492ab94 zephyr : import dts library 
Importing DTS library here to ensure DTS library is built into SOF
firmware as a static library.

Signed-off-by: Joe Cheng <joe.cheng@xperi.com>
 		2023-11-14 08:20:54 -08:00
..
include idc: ipv4: Add idc_comp_free operation 2023-11-08 14:34:35 +02:00
lib zephyr: cavs: add secondary core context save support 2023-11-09 11:17:43 +02:00
scripts xtensa-build-zephyr.py: add new rimage_west_configuration() 2023-05-26 10:47:51 +03:00
CMakeLists.txt zephyr : import dts library 2023-11-14 08:20:54 -08:00
FindZephyr-sdk.cmake .github: de-hardcode zephyr SDK version in sparse build 2022-10-10 11:29:05 +01:00
Kconfig ipc4: Add cross-core binding support 2023-10-25 10:57:53 +03:00
README zephyr: replace obsolete README section with link to sof-docs 2022-02-07 10:43:28 +00:00
docker-build.sh zephyr/docker-build.sh: upgrade CMake to 3.21 or above 2022-12-16 15:19:44 -08:00
docker-run.sh workflows: Zephyr build-linux upgraded Docker container with Zephyr SDK 2023-05-20 01:45:42 +03:00
edf_schedule.c zephyr: edf-schedule: fix CONTAINER_OF type 2023-08-31 22:14:37 +03:00
lib.c zephyr: Add zephyr lib.c standalone file 2022-11-11 15:57:50 +02:00
module.yml zephyr: module: point to where the app is 2022-07-18 14:22:01 +01:00
schedule.c header: rtos: use rtos specific version of alloc.h 2022-09-12 11:44:27 +01:00
wrapper.c zephyr: s/MP_NUM_CPUS/MP_MAX_NUM_CPUS/ 2023-07-25 15:27:05 +01:00

README 

SOF with Zephyr RTOS
====================

SOF currently uses the Cadence Xtos/HAL and it's own kernel functions as
its RTOS. SOF is moving to use Zephyr as it's RTOS in parallel to current
releases using xtos.

The initial "alpha" of SOF on Zephyr will use the Zephyr RTOS for boot, IRQs,
scheduling and memory allocation. Subsequent release will use more Zephyr
functionality as code is moved from SOF to Zephyr (i.e. EDF scheduler updates
copied from SOF to Zephyr).

Building SOF on Zephyr
======================

Section promoted to
https://thesofproject.github.io/latest/getting_started/build-guide/build-with-zephyr.html

Testing on Qemu
===============

Get the SOF qemu sof-v4.2 branch here.

git@github.com:thesofproject/qemu.git

Configure as

./configure' '--prefix=.' '--target-list=xtensa-softmmu,x86_64-softmmu' \
             '--enable-gtk' '--enable-sdl' '--enable-spice' \
             '--audio-drv-list=alsa' '--enable-libusb' \
             '--enable-usb-redir' '--enable-coroutine-pool' \
             '--disable-opengl' '--enable-fdt'

 Then run make.

FW can be tested as follows using the qemu helper script.

 ./xtensa-host.sh apl \
     -r ../../sof/sof/build_apl_gcc/src/arch/xtensa/rom-apl.bin \
     -k ../../zephyrproject/zephyr/build/zephyr/zephyr.ri

Where -r and -k are used to specify the ROM and kernel files.

The ROMS can be built from the SOF repo by running

./scripts/xtensa-build-all.sh  -r -a

Using console
-------------

Using logging and simulator backend with processing printk (LOG_PRINTK)
can bring console in qemu.

 - Enable xtensa simulator logging backend (LOG_BACKEND_XTENSA_SIM).
 - Enable printk processing(LOG_PRINTK)
 - Add "-semihosting" to qemu command line. Make sure it goes through scripts to real qemu.