34 lines
1.1 KiB
ReStructuredText
34 lines
1.1 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0+
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.. Copyright (C) 2024 Jiaxun Yang <[email protected]>
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QEMU Xtensa
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===========
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QEMU for Xtensa supports a special 'virt' machine designed for emulation and
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virtualization purposes. This document describes how to run U-Boot under it.
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The QEMU virt machine models a generic Xtensa virtual machine with PCI Bus
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and Xtensa ISS simcall semihosting support. It supports many different Xtensa
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CPU configuration. Currently, only dc233c variant is tested against U-Boot.
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Building U-Boot
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---------------
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Set the CROSS_COMPILE environment variable as usual, and run:
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make qemu-xtensa-dc233c_defconfig
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make
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Note that Xtensa's toolchain is bounded to CPU configuration, you must use
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the toolchain built for exactly the same CPU configuration as you selected
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in U-Boot.
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Running U-Boot
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--------------
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The minimal QEMU command line to get U-Boot up and running is:
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qemu-system-xtensa -nographic -machine virt -cpu dc233c -semihosting -kernel ./u-boot.elf
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You many change cpu option to match your U-Boot CPU type configuration.
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semihosting option is mandatory because this is the only way to interact
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with U-Boot in command line.
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