1*d5587fa3STuomas Tynkkynen# 2*d5587fa3STuomas Tynkkynen# Copyright (C) 2017, Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi> 3*d5587fa3STuomas Tynkkynen# 4*d5587fa3STuomas Tynkkynen# SPDX-License-Identifier: GPL-2.0+ 5*d5587fa3STuomas Tynkkynen# 6*d5587fa3STuomas Tynkkynen 7*d5587fa3STuomas TynkkynenU-Boot on QEMU's 'virt' machine on ARM 8*d5587fa3STuomas Tynkkynen====================================== 9*d5587fa3STuomas Tynkkynen 10*d5587fa3STuomas TynkkynenQEMU for ARM supports a special 'virt' machine designed for emulation and 11*d5587fa3STuomas Tynkkynenvirtualization purposes. This document describes how to run U-Boot under it. 12*d5587fa3STuomas Tynkkynen 13*d5587fa3STuomas TynkkynenThe 'virt' platform provides the following as the basic functionality: 14*d5587fa3STuomas Tynkkynen 15*d5587fa3STuomas Tynkkynen - A freely configurable amount of CPU cores 16*d5587fa3STuomas Tynkkynen - U-Boot loaded and executing in the emulated flash at address 0x0 17*d5587fa3STuomas Tynkkynen - A generated device tree blob placed at the start of RAM 18*d5587fa3STuomas Tynkkynen - A freely configurable amount of RAM, described by the DTB 19*d5587fa3STuomas Tynkkynen - A PL011 serial port, discoverable via the DTB 20*d5587fa3STuomas Tynkkynen - An ARMv7 architected timer 21*d5587fa3STuomas Tynkkynen - PSCI for rebooting the system 22*d5587fa3STuomas Tynkkynen - A generic ECAM-based PCI host controller, discoverable via the DTB 23*d5587fa3STuomas Tynkkynen 24*d5587fa3STuomas TynkkynenAdditionally, a number of optional peripherals can be added to the PCI bus. 25*d5587fa3STuomas Tynkkynen 26*d5587fa3STuomas TynkkynenBuilding U-Boot 27*d5587fa3STuomas Tynkkynen--------------- 28*d5587fa3STuomas TynkkynenSet the CROSS_COMPILE and ARCH=arm environment variables as usual, and run: 29*d5587fa3STuomas Tynkkynen 30*d5587fa3STuomas Tynkkynen make qemu_arm_defconfig 31*d5587fa3STuomas Tynkkynen make 32*d5587fa3STuomas Tynkkynen 33*d5587fa3STuomas TynkkynenRunning U-Boot 34*d5587fa3STuomas Tynkkynen-------------- 35*d5587fa3STuomas TynkkynenThe minimal QEMU command line to get U-Boot up and running is: 36*d5587fa3STuomas Tynkkynen 37*d5587fa3STuomas Tynkkynen qemu-system-arm -machine virt,highmem=off -bios u-boot.bin 38*d5587fa3STuomas Tynkkynen 39*d5587fa3STuomas TynkkynenThe 'highmem=off' parameter to the 'virt' machine is required for PCI to work 40*d5587fa3STuomas Tynkkynenin U-Boot. 41*d5587fa3STuomas Tynkkynen 42*d5587fa3STuomas TynkkynenAdditional peripherals that have been tested to work in both U-Boot and Linux 43*d5587fa3STuomas Tynkkynencan be enabled with the following command line parameters: 44*d5587fa3STuomas Tynkkynen 45*d5587fa3STuomas Tynkkynen- To add a Serial ATA disk via an Intel ICH9 AHCI controller, pass e.g.: 46*d5587fa3STuomas Tynkkynen -drive if=none,file=disk.img,id=mydisk -device ich9-ahci,id=ahci -device ide-drive,drive=mydisk,bus=ahci.0 47*d5587fa3STuomas Tynkkynen- To add an Intel E1000 network adapter, pass e.g.: 48*d5587fa3STuomas Tynkkynen -netdev user,id=net0 -device e1000,netdev=net0 49*d5587fa3STuomas Tynkkynen- To add an EHCI-compliant USB host controller, pass e.g.: 50*d5587fa3STuomas Tynkkynen -device usb-ehci,id=ehci 51*d5587fa3STuomas Tynkkynen- To add a NVMe disk, pass e.g.: 52*d5587fa3STuomas Tynkkynen -drive if=none,file=disk.img,id=mydisk -device nvme,drive=mydisk,serial=foo 53*d5587fa3STuomas Tynkkynen 54*d5587fa3STuomas TynkkynenThese have been tested in QEMU 2.9.0 but should work in at least 2.5.0 as well. 55