62fd5ab3e1
Move memory mapping of Xen node to Grant Table driver system init function. After moving mapping we don't need anymore records of xen-xen node into 'mmu_regions' array, so they were deleted from all SoCs: Rcar Gen3/Gen4 and XenVM. We need at least 16M of virtual address space to map memory of Xen node, so the virtual memory sized has been increased to 32 MB, it should be enough for basic use-cases and mapping of 16M mem region of Xen node. Unfortunately, after moving we also need to increase number of XLAT tables. The previous code was more efficient if we talking about usage of XLAT tables, because it mapped grant tables using a higher- order table that allows mapping blocks of 2MB. And after the changes is maps every 4KB page, so we need more XLAT tables. Increase number of grant frames, it is needed to sync stage 1 and stage 2 memory mappings, previously we map only one page on stage 2 and further usage of unmap regions can cause MMU translation errors. Perform mapping stage 1 before mapping for stage 2 (add to physmap), because right after stage 1 we can try to access memory and if it is unmap in stage 2, error will be received during translation. Note: Xen Grant Table driver doesn't use Zephyr Device Model. Authored-by: Mykola Kvach <mykola_kvach@epam.com> Co-authored-by: Oleksii Moisieiev <oleksii_moisieiev@epam.com> Signed-off-by: Mykola Kvach <mykola_kvach@epam.com> |
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.. raw:: html <a href="https://www.zephyrproject.org"> <p align="center"> <picture> <source media="(prefers-color-scheme: dark)" srcset="doc/_static/images/logo-readme-dark.svg"> <source media="(prefers-color-scheme: light)" srcset="doc/_static/images/logo-readme-light.svg"> <img src="doc/_static/images/logo-readme-light.svg"> </picture> </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