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Guennadi Liakhovetski beb7d7f93c zephyr: fix schedule_edf_task_cancel() return value 
schedule_edf_task_cancel() should return 0 or an error code, whereas
k_work_cancel_delayable() returns flags, depending on the state of
the task being cancelled. Return value of schedule_task_cancel()
is never checked so this bug had no negative effect on SOF.

Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
 		2021-05-10 15:05:40 +01:00
..
include/sof zephyr: remove LOG_* API left-over 2021-05-04 16:10:49 +01:00
CMakeLists.txt zephyr: add sample-smart-amp component to the wrapper 2021-05-06 14:45:05 +01:00
Kconfig zephyr: reference local Kconfig 2021-02-11 20:19:15 +00:00
README zephyr: Update README to add instruction for debug loggin on qmeu 2020-07-23 14:58:25 +01:00
docker-build.sh .github: add Zephyr build 2021-04-30 11:12:29 +01:00
edf_schedule.c zephyr: fix schedule_edf_task_cancel() return value 2021-05-10 15:05:40 +01:00
module.yml zephyr: reference local Kconfig 2021-02-11 20:19:15 +00:00
schedule.c zephyr: schedule: enable multi-core scheduling 2021-05-05 11:03:35 +01:00
wrapper.c zephyr: fix key-phrase-buffer init in wrapper 2021-05-06 14:45:05 +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
======================

Zephyr support is still WiP and moving fast so it's best to use the latest
code. Some familiarity of SOF and Zephyr is also needed here.

SOF
---

repo: git@github.com:thesofproject/sof.git

branch: lrg/topic/zephyr-app on the SOF repo


Zephyr
------

repo: git@github.com:thesofproject/zephyr.git

branch: intel_adsp_soc_family

Building
========

SOF on Zephyr only using the UP^2 platform atm, but it should be possible to
add others platforms as the features are validated on UP^2.

Please checkout the SOF repo to zephyrproject/modules/audio/sof

Then from zephyr directory.

% source zephyr.sh

This will setup the Zephyr environment, code can then be built

% west build -p always  -b up_squared_adsp samples/basic/minimal
% west sign -t rimage -- -k ../../sof/sof/rimage/keys/otc_private_key.pem


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.