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Kai Vehmanen 63eda919d3 zephyr: unify CTX_SAVE handling for Zephyr 
Clean up the ifdefs for ipc_pm_context_save(). By implementing
platform_timer_stop() in the Zephyr wrapper, the original context
save sequence can be used also for Zephyr builds.

By doing this, we can fix issues with IPC timeout on CTX_SAVE.
Disabling all interrupts before the IPC reply is needed also on
Zephyr.

BugLink: https://github.com/thesofproject/sof/issues/4507
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
 		2021-08-12 19:48:09 +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 ipc: share some utility functions for ipc4 path 2021-08-03 15:17:37 +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: unify CTX_SAVE handling for Zephyr 2021-08-12 19:48:09 +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.