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Marc Herbert 5311f61037 zephyr/cmake: fix target_compile_options() comments. No code change 
Add reference to -fno-inline-functions issue
https://github.com/thesofproject/sof/issues/5212

Add examples of compilation failures without gnu99.

Fixes commit e430629a1e ("xt-clang: Do not use -std=gnu99 for C++")
that separated the comment from its code.

Signed-off-by: Marc Herbert <marc.herbert@intel.com>
 		2022-11-30 11:50:28 +00:00
..
include zephyr: Add zephyr lib.c standalone file 2022-11-11 15:57:50 +02:00
lib zephyr: move memory allocation code 1:1 from wrapper.c to alloc.c 2022-11-21 17:09:52 +00:00
CMakeLists.txt zephyr/cmake: fix target_compile_options() comments. No code change 2022-11-30 11:50:28 +00:00
FindZephyr-sdk.cmake .github: de-hardcode zephyr SDK version in sparse build 2022-10-10 11:29:05 +01:00
Kconfig Introduce Zephyr DMA domain as experimental feature 2022-11-02 12:34:34 +00:00
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.sh: give PATH precedence to a local sparse 2022-11-22 09:19:45 +00:00
docker-run.sh zephyr/docker-run.sh: show zephyr-build OS with lsb_release -a 2022-11-22 09:19:45 +00:00
edf_schedule.c zephyr: edf-schedule: (cosmetic) make two variables static 2022-10-03 12:23:39 +03:00
lib.c zephyr: Add zephyr lib.c standalone file 2022-11-11 15:57:50 +02:00
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 zephyr: move memory allocation code 1:1 from wrapper.c to alloc.c 2022-11-21 17:09:52 +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.