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This patch is a preparatory step in enabling the MMU in long mode; no steps are taken to implement long mode support. We introduce struct x86_page_tables, which represents the top-level data structure for page tables: - For 32-bit, this will contain a four-entry page directory pointer table (PDPT) - For 64-bit, this will (eventually) contain a page map level 4 table (PML4) In either case, this pointer value is what gets programmed into CR3 to activate a set of page tables. There are extra bits in CR3 to set for long mode, we'll get around to that later. This abstraction will allow us to use the same APIs that work with page tables in either mode, rather than hard-coding that the top level data structure is a PDPT. z_x86_mmu_validate() has been re-written to make it easier to add another level of paging for long mode, to support 2MB PDPT entries, and correctly validate regions which span PDPTE entries. Some MMU-related APIs moved out of 32-bit x86's arch.h into mmustructs.h. Signed-off-by: Andrew Boie <andrew.p.boie@intel.com> |
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arch | ||
boards | ||
cmake | ||
doc | ||
drivers | ||
dts | ||
ext | ||
include | ||
kernel | ||
lib | ||
misc | ||
modules | ||
samples | ||
scripts | ||
soc | ||
subsys | ||
tests | ||
.checkpatch.conf | ||
.clang-format | ||
.codecov.yml | ||
.editorconfig | ||
.gitattributes | ||
.gitignore | ||
.gitlint | ||
.mailmap | ||
.shippable.yml | ||
.uncrustify.cfg | ||
CMakeLists.txt | ||
CODE_OF_CONDUCT.md | ||
CODEOWNERS | ||
CONTRIBUTING.rst | ||
Kconfig | ||
Kconfig.zephyr | ||
LICENSE | ||
Makefile | ||
README.rst | ||
VERSION | ||
version.h.in | ||
west.yml | ||
zephyr-env.cmd | ||
zephyr-env.sh |
.. 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