mirror of https://github.com/thesofproject/sof.git
985c5b5685
To increase performance of audio application code, the SOF heap should be mapped to cached address region on platforms with aliased cached/uncached memory layout. This splits the heap into two and maps the SOF_MEM_ZONE_BUFFER to the cached heap and all rest to uncached heap. The raw heap memory area is still mapped to uncached memory, even for the cached heap. The allocated blocks are converted to cached addresses and passed to SOF users of rmalloc() and rballoc_align(). To ensure application buffers do not share cachelines with heap metadata chunks, allocation sizes are rounded up to integer multiples of platform cacheline size. BugLink: https://github.com/thesofproject/sof/issues/4306 Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com> |
||
|---|---|---|
| .. | ||
| include/sof | ||
| CMakeLists.txt | ||
| Kconfig | ||
| README | ||
| docker-build.sh | ||
| edf_schedule.c | ||
| module.yml | ||
| schedule.c | ||
| wrapper.c | ||
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.