Go to file
Enjia Mai dcda15d17d drivers: timer: use sys_read64 to read HPET counter on 64 bits cpu
For 32 bit processor to read the 64 bits hpet counter, the HPET spec
2.4.7 suggest to read HPET counter high and low then checking the
high bits to decide if it rollovers or not.

But this logic seems to cause problem for 64 bits processor under SMP,
there is a possible one tick earier under tickless mode. It is likely
to be the cache coherence issue, because a mfence instruction before
reading the timer works.

So we change to read the 64 bits counter by sys_read64 on 64bit
processor to prevent this issue.

Fixes #49611

Signed-off-by: Enjia Mai <enjia.mai@intel.com>
2022-10-12 18:47:19 +09:00
.github ci: release: stop creating releases for RC tags 2022-10-10 07:25:15 -07:00
arch arm: add missing includes 2022-10-11 18:37:53 -04:00
boards boards: fvp_baser_aemv8r: remove SOC_FVP_AEMV8R_EL2_INIT code 2022-10-12 18:46:49 +09:00
cmake init: s/ARCH/EARLY, call it just before arch kernel init 2022-10-12 17:16:27 +09:00
doc init: s/ARCH/EARLY, call it just before arch kernel init 2022-10-12 17:16:27 +09:00
drivers drivers: timer: use sys_read64 to read HPET counter on 64 bits cpu 2022-10-12 18:47:19 +09:00
dts timer: intel_adsp: use DTS for hardware information 2022-10-11 12:50:05 -04:00
include/zephyr init: s/ARCH/EARLY, call it just before arch kernel init 2022-10-12 17:16:27 +09:00
kernel init: s/ARCH/EARLY, call it just before arch kernel init 2022-10-12 17:16:27 +09:00
lib lib: notify: build sys-notify conditionally. 2022-10-03 10:18:15 +02:00
misc misc: generated: update configs.c template with <zephyr/...> prefix 2022-05-09 12:45:29 -04:00
modules modules: mbedtls: Replace select statement with depends on for EC 2022-10-07 15:12:42 +02:00
samples include: add missing sys/printk.h include 2022-10-11 18:05:17 +02:00
scripts Devicetree: edtlib: fix possible KeyError in Binding.description 2022-10-12 18:45:32 +09:00
share cmake: extend zephyr_get() to handle build configurations from sysbuild 2022-09-02 15:16:50 +02:00
soc boards: fvp_baser_aemv8r: remove SOC_FVP_AEMV8R_EL2_INIT code 2022-10-12 18:46:49 +09:00
submanifests
subsys net: pkt: Allow compilation with custom IEEE 802.15.4 based L2 2022-10-12 18:46:09 +09:00
tests tests: timer: timer_behavior: add a tick align 2022-10-12 18:47:19 +09:00
.checkpatch.conf
.clang-format clang-format: do not merge blocks/functions into single line 2022-07-15 19:18:28 -04:00
.codecov.yml
.editorconfig editorconfig: Improve verbosity 2022-04-28 08:55:39 -04:00
.gitattributes
.gitignore .gitignore: exempt scripts/build from ignore 2022-07-30 08:29:29 -05:00
.gitlint
.mailmap
CMakeLists.txt cmake: move testing of compile flag in environment to top CMakeLists.txt 2022-09-01 15:59:43 +02:00
CODE_OF_CONDUCT.md
CODEOWNERS CODEOWNERS: add MG100 board owner 2022-10-03 10:11:28 +02:00
CONTRIBUTING.rst
Kconfig
Kconfig.zephyr linker: correct linker script _flash_used calculation 2022-10-03 13:13:46 +00:00
LICENSE
MAINTAINERS.yml MAINTAINERS: Move audio shell into Bluetooth audio 2022-10-04 19:14:10 +00:00
README.rst readme: Update stale documentation links 2022-06-06 12:07:12 +02:00
VERSION VERSION: bump to 3.2.99 2022-09-30 13:06:22 -05:00
version.h.in
west.yml manifest: update lvgl 2022-10-11 18:05:17 +02:00
zephyr-env.cmd
zephyr-env.sh everywhere: fix typos 2022-03-18 13:24:08 -04:00

.. raw:: html

   <a href="https://www.zephyrproject.org">
     <p align="center">
       <img src="doc/_static/images/logo-readme.svg">
     </p>
   </a>

   <a href="https://bestpractices.coreinfrastructure.org/projects/74"><img
   src="https://bestpractices.coreinfrastructure.org/projects/74/badge"></a>
   <a
   href="https://github.com/zephyrproject-rtos/zephyr/actions/workflows/twister.yaml?query=branch%3Amain">
   <img
   src="https://github.com/zephyrproject-rtos/zephyr/actions/workflows/twister.yaml/badge.svg?event=push"></a>


The Zephyr Project is a scalable real-time operating system (RTOS) supporting
multiple hardware architectures, optimized for resource constrained devices,
and built with security in mind.

The Zephyr OS is based on a small-footprint kernel designed for use on
resource-constrained systems: from simple embedded environmental sensors and
LED wearables to sophisticated smart watches and IoT wireless gateways.

The Zephyr kernel supports multiple architectures, including ARM (Cortex-A,
Cortex-R, Cortex-M), Intel x86, ARC, Nios II, Tensilica Xtensa, and RISC-V,
SPARC, MIPS, and a large number of `supported boards`_.

.. below included in doc/introduction/introduction.rst


Getting Started
***************

Welcome to Zephyr! See the `Introduction to Zephyr`_ for a high-level overview,
and the documentation's `Getting Started Guide`_ to start developing.

.. start_include_here

Community Support
*****************

Community support is provided via mailing lists and Discord; see the Resources
below for details.

.. _project-resources:

Resources
*********

Here's a quick summary of resources to help you find your way around:

* **Help**: `Asking for Help Tips`_
* **Documentation**: http://docs.zephyrproject.org (`Getting Started Guide`_)
* **Source Code**: https://github.com/zephyrproject-rtos/zephyr is the main
  repository; https://elixir.bootlin.com/zephyr/latest/source contains a
  searchable index
* **Releases**: https://github.com/zephyrproject-rtos/zephyr/releases
* **Samples and example code**: see `Sample and Demo Code Examples`_
* **Mailing Lists**: users@lists.zephyrproject.org and
  devel@lists.zephyrproject.org are the main user and developer mailing lists,
  respectively. You can join the developer's list and search its archives at
  `Zephyr Development mailing list`_. The other `Zephyr mailing list
  subgroups`_ have their own archives and sign-up pages.
* **Nightly CI Build Status**: https://lists.zephyrproject.org/g/builds
  The builds@lists.zephyrproject.org mailing list archives the CI nightly build results.
* **Chat**: Real-time chat happens in Zephyr's Discord Server. Use
  this `Discord Invite`_ to register.
* **Contributing**: see the `Contribution Guide`_
* **Wiki**: `Zephyr GitHub wiki`_
* **Issues**: https://github.com/zephyrproject-rtos/zephyr/issues
* **Security Issues**: Email vulnerabilities@zephyrproject.org to report
  security issues; also see our `Security`_ documentation. Security issues are
  tracked separately at https://zephyrprojectsec.atlassian.net.
* **Zephyr Project Website**: https://zephyrproject.org

.. _Discord Invite: https://chat.zephyrproject.org
.. _supported boards: http://docs.zephyrproject.org/latest/boards/index.html
.. _Zephyr Documentation: http://docs.zephyrproject.org
.. _Introduction to Zephyr: http://docs.zephyrproject.org/latest/introduction/index.html
.. _Getting Started Guide: http://docs.zephyrproject.org/latest/develop/getting_started/index.html
.. _Contribution Guide: http://docs.zephyrproject.org/latest/contribute/index.html
.. _Zephyr GitHub wiki: https://github.com/zephyrproject-rtos/zephyr/wiki
.. _Zephyr Development mailing list: https://lists.zephyrproject.org/g/devel
.. _Zephyr mailing list subgroups: https://lists.zephyrproject.org/g/main/subgroups
.. _Sample and Demo Code Examples: http://docs.zephyrproject.org/latest/samples/index.html
.. _Security: http://docs.zephyrproject.org/latest/security/index.html
.. _Asking for Help Tips: https://docs.zephyrproject.org/latest/develop/getting_started/index.html#asking-for-help