Primary Git Repository for the Zephyr Project. Zephyr is a new generation, scalable, optimized, secure RTOS for multiple hardware architectures.
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Charles E. Youse 3036faf88a tests/benchmarks: fix BOOT_TIME_MEASUREMENT
The boot time measurement sample was giving bogus values on x86: an
assumption was made that the system timer is in sync with the CPU TSC,
which is not the case on most x86 boards.

Boot time measurements are no longer permitted unless the timer source
is the local APIC. To avoid issues of TSC scaling, the startup datum
has been forced to 0, which is in line with the ARM implementation
(which is the only other platform which supports this feature).

Cleanups along the way:

As the datum is now assumed zero, some variables are removed and
calculations simplified. The global variables involved in boot time
measurements are moved to the kernel.h header rather than being
redeclared in every place they are referenced. Since none of the
measurements actually use 64-bit precision, the samples are reduced
to 32-bit quantities.

In addition, this feature has been enabled in long mode.

Fixes: #19144

Signed-off-by: Charles E. Youse <charles.youse@intel.com>
2019-09-21 16:43:26 -07:00
.github/ISSUE_TEMPLATE
.known-issues
arch tests/benchmarks: fix BOOT_TIME_MEASUREMENT 2019-09-21 16:43:26 -07:00
boards boards: mec1501modular_assy6885: Reduce image file size 2019-09-21 13:35:14 -07:00
cmake cmake: Explicitly set the entry point when testing toolchain flags 2019-09-19 09:29:57 -05:00
doc debug: tracing: Common Trace Format Simplification 2019-09-20 09:06:38 -04:00
drivers drivers: hwinfo: Add LiteX DNA driver 2019-09-21 21:36:00 +02:00
dts drivers: hwinfo: Add LiteX DNA driver 2019-09-21 21:36:00 +02:00
ext ext: tinycrypt: Update tinycrypt revision 2019-09-07 14:13:59 +02:00
include tests/benchmarks: fix BOOT_TIME_MEASUREMENT 2019-09-21 16:43:26 -07:00
kernel tests/benchmarks: fix BOOT_TIME_MEASUREMENT 2019-09-21 16:43:26 -07:00
lib lib/timeutil: avoid implementation-defined behavior 2019-09-19 20:49:51 -04:00
misc
modules west: remove qmsi module 2019-09-18 11:06:18 -05:00
samples Bluetooth: GATT: Add support to setting permission on CCCD 2019-09-19 21:12:39 +03:00
scripts scripts: edtlib: Add a Device.children attribute with child Devices 2019-09-21 09:10:36 -05:00
soc arm: v2m_musca: Enable GPIO support 2019-09-20 10:05:18 -05:00
subsys tests/benchmarks: fix BOOT_TIME_MEASUREMENT 2019-09-21 16:43:26 -07:00
tests tests/benchmarks: fix BOOT_TIME_MEASUREMENT 2019-09-21 16:43:26 -07:00
.checkpatch.conf
.clang-format
.codecov.yml
.editorconfig
.gitattributes
.gitignore
.gitlint
.mailmap
.shippable.yml ci: updates to fix pylint commit test 2019-09-13 10:00:16 -05:00
.uncrustify.cfg
CMakeLists.txt cmake: Cache the 'toolchain-is-ok' test as well 2019-09-07 10:25:12 -04:00
CODEOWNERS CODEOWNERS: Add entry for CC13x2/CC26x2 RTC timer driver 2019-09-19 13:43:10 -05:00
CODE_OF_CONDUCT.md
CONTRIBUTING.rst
Kconfig
Kconfig.zephyr kconfig: Convert device tree chosen properties to new kconfigfunctions 2019-09-13 11:42:34 -05:00
LICENSE
Makefile
README.rst doc: fix broken doc links 2019-09-06 16:14:39 +02:00
VERSION release: Post-release patch level update 2019-09-07 12:29:56 +02:00
version.h.in
west.yml modules: hal: nordic: Remove dependency on DT from NRF_* mappings 2019-09-20 17:16:35 +02:00
zephyr-env.cmd
zephyr-env.sh

README.rst

.. raw:: html

   <a href="https://www.zephyrproject.org">
     <p align="center">
       <img src="doc/images/Zephyr-Project.png">
     </p>
   </a>

   <a href="https://bestpractices.coreinfrastructure.org/projects/74"><img
   src="https://bestpractices.coreinfrastructure.org/projects/74/badge"></a>
   <img
   src="https://api.shippable.com/projects/58ffb2b8baa5e307002e1d79/badge?branch=master">


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-M,
Intel x86, ARC, Nios II, Tensilica Xtensa, and RISC-V, and a large number of
`supported boards`_.

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

.. start_include_here

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.

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

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

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://zephyrproject.org/developers/#downloads
* **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
  (shippable) nightly build results.
* **Chat**: Zephyr's Slack workspace is https://zephyrproject.slack.com.  Use
  this `Slack 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

.. _Slack Invite: https://tinyurl.com/y5glwylp
.. _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/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/guides/getting-help.html