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Iuliana Prodan 0065719234 zephyr: add cache_attr.c in zephyr_library_sources 
COMPILER_WORKAROUND_CACHE_ATTR is also enabled on Zephyr,
but the cache_attr.c file is not compiled since is not added in
zephyr_library_sources.

Without this fix, we get:
cache.h:110: undefined reference to `glb_is_cached'

I've added the file for all platforms since cache_attr.c is generic.


Signed-off-by: Iuliana Prodan <iuliana.prodan@nxp.com>
 		2021-08-27 14:00:10 +01:00
..
include/sof Revert "trace: add _log_nodict() and enable DMA trace for Zephyr" 2021-07-30 15:25:09 -05:00
CMakeLists.txt zephyr: add cache_attr.c in zephyr_library_sources 2021-08-27 14:00:10 +01:00
Kconfig kconfig: allow SOF Kconfig to be included in other projects 2021-08-04 12:34:39 +01:00
README zephyr: Update README to add instruction for debug loggin on qmeu 2020-07-23 14:58:25 +01:00
docker-build.sh zephyr/docker-build.sh: apt-get install tree 2021-07-13 15:56:49 +01:00
edf_schedule.c schedule: (cosmetic) remove three redundant variable initialisations 2021-05-24 11:17:22 +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: wrapper: make sof_heap global again 2021-08-27 14:00:10 +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.