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Diffstat (limited to 'doc/board/emulation/qemu-xtensa.rst')
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diff --git a/doc/board/emulation/qemu-xtensa.rst b/doc/board/emulation/qemu-xtensa.rst new file mode 100644 index 00000000000..fff23c1a9b0 --- /dev/null +++ b/doc/board/emulation/qemu-xtensa.rst @@ -0,0 +1,33 @@ +.. SPDX-License-Identifier: GPL-2.0+ +.. Copyright (C) 2024 Jiaxun Yang <jiaxun.yang@flygoat.com> + +QEMU Xtensa +=========== + +QEMU for Xtensa supports a special 'virt' machine designed for emulation and +virtualization purposes. This document describes how to run U-Boot under it. + +The QEMU virt machine models a generic Xtensa virtual machine with PCI Bus +and Xtensa ISS simcall semihosting support. It supports many different Xtensa +CPU configuration. Currently, only dc233c variant is tested against U-Boot. + +Building U-Boot +--------------- +Set the CROSS_COMPILE environment variable as usual, and run: + + make qemu-xtensa-dc233c_defconfig + make + +Note that Xtensa's toolchain is bounded to CPU configuration, you must use +the toolchain built for exactly the same CPU configuration as you selected +in U-Boot. + +Running U-Boot +-------------- +The minimal QEMU command line to get U-Boot up and running is: + + qemu-system-xtensa -nographic -machine virt -cpu dc233c -semihosting -kernel ./u-boot.elf + +You many change cpu option to match your U-Boot CPU type configuration. +semihosting option is mandatory because this is the only way to interact +with U-Boot in command line. |