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Daniel Baluta b06f2cfe23 zephyr: add codec adapter components 
This enables codec_adapter and cadence/passhtrough codecs
with SOF on Zephyr.

passthrough codec can be used as it is, but cadence codec
will also need codec libraries from cadence.

Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
 		2022-02-18 21:12:24 +00:00
..
include/sof zephyr/atomic.h: add a no-op cast: (long)atomic_read() 2021-11-19 11:16:50 +00:00
CMakeLists.txt zephyr: add codec adapter components 2022-02-18 21:12:24 +00:00
Kconfig zephyr: enable cached heap by default for Intel cAVS platforms 2021-10-15 09:28:28 +01:00
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: fix "stale" ZEPHYR_SDK_INSTALL_DIR comment 2021-09-29 16:58:24 +01:00
edf_schedule.c zephyr: (cosmetic) fix indentation 2021-09-07 13:34:31 +01:00
module.yml zephyr/module.yml: add URL, name: and comment out default values 2021-07-13 15:56:49 +01:00
schedule.c zephyr: schedule: enable multi-core scheduling 2021-05-05 11:03:35 +01:00
wrapper.c zephyr: add codec adapter components 2022-02-18 21:12:24 +00:00

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.