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Marc Herbert 027be98371 zephyr/docker: move exec_as_sof_uid() to new sudo-cwd.sh 
Besides making things more obvious, the important functional change is
that the user switch is now performed for _every_ invoked, command, not
just for the build command.

Signed-off-by: Marc Herbert <marc.herbert@intel.com>
 		2022-10-10 11:29:05 +01:00
..
include platform: mtl: Add meteorlake plaftom 2022-09-21 15:15:26 +02:00
CMakeLists.txt mtl: Added meteorlake platform to the build system 2022-09-21 15:15:26 +02:00
Kconfig mtl: Added meteorlake platform to the build system 2022-09-21 15:15:26 +02:00
README zephyr: replace obsolete README section with link to sof-docs 2022-02-07 10:43:28 +00:00
docker-build.sh zephyr/docker: move exec_as_sof_uid() to new sudo-cwd.sh 2022-10-10 11:29:05 +01:00
docker-run.sh zephyr/docker: move exec_as_sof_uid() to new sudo-cwd.sh 2022-10-10 11:29:05 +01:00
edf_schedule.c zephyr: edf-schedule: (cosmetic) make two variables static 2022-10-03 12:23:39 +03:00
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 eq_fir: use module interface 2022-10-03 13:26:31 +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.