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* Revert "arch: arm/xen: add putc() for debugging"Tom Rini2020-10-231-6/+0
| | | | | | This reverts commit 3a51b2a2c3cedc0d2a9ce981b8e00ab8cefcb6b7. Signed-off-by: Tom Rini <trini@konsulko.com>
* arch: arm/xen: add putc() for debuggingAKASHI Takahiro2020-10-221-0/+6
| | | | | | | | | | | | This new function, xen_debug_putc(), is intended to be used to enable CONFIG_DEBUG_UART on xen guest. Please note that the underlying functionality in Xen is available only when Xen is configured with !NDEBUG but is much simpler than a generic HYPERVISOR_console_io(). Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> Reviewed-by: Peng Fan <peng.fan@nxp.com>
* xen: Port Xen hypervisor related code from mini-osOleksandr Andrushchenko2020-08-141-0/+88
| | | | | | | | | | | | | | | | | | | | | | Port hypervisor related code from Mini-OS. This is referencing the code of Mini-OS from [1] by Huang Shijie and Volodymyr Babchuk which is for ARM64. Update essential arch code to support required bit operations, memory barriers etc. Copyright for the bits ported belong to at least the following authors, please see related files for details: Copyright (c) 2002-2003, K A Fraser Copyright (c) 2005, Grzegorz Milos, gm281@cam.ac.uk,Intel Research Cambridge Copyright (c) 2014, Karim Allah Ahmed <karim.allah.ahmed@gmail.com> [1] - https://github.com/zyzii/mini-os.git Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> Signed-off-by: Anastasiia Lukianenko <anastasiia_lukianenko@epam.com> [trini: Drop wmb() from musb-net/linux-compat.h now] Signed-off-by: Tom Rini <trini@konsulko.com>
* board: Introduce xenguest_arm64 boardAndrii Anisov2020-08-141-0/+22
Introduce a minimal Xen guest board running as a virtual machine under Xen Project's hypervisor [1], [2]. Part of the code is ported from Xen mini-os and also uses work initially done by different authors from NXP: please see relevant files for their copyrights. [1] https://xenbits.xen.org [2] https://wiki.xenproject.org/ Signed-off-by: Andrii Anisov <andrii_anisov@epam.com> Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> Signed-off-by: Anastasiia Lukianenko <anastasiia_lukianenko@epam.com>