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git01.mediatek.com / filogic / uboot / ba67d031641f475d6da7df9bfb56ced48c49028c / . / doc / README.qemu-arm
blob: 260165638aa44bcf3a473ccc6268b92ac8538221 [file] [log] [blame]
Tom Rini10e47792018-05-06 17:58:06 -0400[diff] [blame]1# SPDX-License-Identifier: GPL-2.0+
Tuomas Tynkkynena1c21782017-10-09 19:42:41 +0300[diff] [blame]2#
3# Copyright (C) 2017, Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
Tuomas Tynkkynena1c21782017-10-09 19:42:41 +0300[diff] [blame]4
Tuomas Tynkkynen87145cf2018-01-11 16:11:24 +0200[diff] [blame]5U-Boot on QEMU's 'virt' machine on ARM & AArch64
6================================================
Tuomas Tynkkynena1c21782017-10-09 19:42:41 +0300[diff] [blame]7
8QEMU for ARM supports a special 'virt' machine designed for emulation and
9virtualization purposes. This document describes how to run U-Boot under it.
Tuomas Tynkkynen87145cf2018-01-11 16:11:24 +0200[diff] [blame]10Both 32-bit ARM and AArch64 are supported.
Tuomas Tynkkynena1c21782017-10-09 19:42:41 +0300[diff] [blame]11
12The 'virt' platform provides the following as the basic functionality:
13
14 - A freely configurable amount of CPU cores
15 - U-Boot loaded and executing in the emulated flash at address 0x0
16 - A generated device tree blob placed at the start of RAM
17 - A freely configurable amount of RAM, described by the DTB
18 - A PL011 serial port, discoverable via the DTB
Tuomas Tynkkynen87145cf2018-01-11 16:11:24 +0200[diff] [blame]19 - An ARMv7/ARMv8 architected timer
Tuomas Tynkkynena1c21782017-10-09 19:42:41 +0300[diff] [blame]20 - PSCI for rebooting the system
21 - A generic ECAM-based PCI host controller, discoverable via the DTB
22
23Additionally, a number of optional peripherals can be added to the PCI bus.
24
25Building U-Boot
26---------------
Tuomas Tynkkynen87145cf2018-01-11 16:11:24 +0200[diff] [blame]27Set the CROSS_COMPILE environment variable as usual, and run:
Tuomas Tynkkynena1c21782017-10-09 19:42:41 +0300[diff] [blame]28
Tuomas Tynkkynen87145cf2018-01-11 16:11:24 +0200[diff] [blame]29- For ARM:
Tuomas Tynkkynena1c21782017-10-09 19:42:41 +0300[diff] [blame]30 make qemu_arm_defconfig
31 make
32
Tuomas Tynkkynen87145cf2018-01-11 16:11:24 +0200[diff] [blame]33- For AArch64:
34 make qemu_arm64_defconfig
35 make
36
Tuomas Tynkkynena1c21782017-10-09 19:42:41 +0300[diff] [blame]37Running U-Boot
38--------------
39The minimal QEMU command line to get U-Boot up and running is:
40
Tuomas Tynkkynen87145cf2018-01-11 16:11:24 +0200[diff] [blame]41- For ARM:
Tuomas Tynkkynen9cd7ac92018-05-14 18:47:52 +0300[diff] [blame]42 qemu-system-arm -machine virt -bios u-boot.bin
Tuomas Tynkkynena1c21782017-10-09 19:42:41 +0300[diff] [blame]43
Tuomas Tynkkynen87145cf2018-01-11 16:11:24 +0200[diff] [blame]44- For AArch64:
Tuomas Tynkkynen9cd7ac92018-05-14 18:47:52 +0300[diff] [blame]45 qemu-system-aarch64 -machine virt -cpu cortex-a57 -bios u-boot.bin
Tuomas Tynkkynen87145cf2018-01-11 16:11:24 +0200[diff] [blame]46
Tuomas Tynkkynen9cd7ac92018-05-14 18:47:52 +0300[diff] [blame]47Note that for some odd reason qemu-system-aarch64 needs to be explicitly
Tuomas Tynkkynen87145cf2018-01-11 16:11:24 +0200[diff] [blame]48told to use a 64-bit CPU or it will boot in 32-bit mode.
Tuomas Tynkkynena1c21782017-10-09 19:42:41 +0300[diff] [blame]49
50Additional peripherals that have been tested to work in both U-Boot and Linux
51can be enabled with the following command line parameters:
52
53- To add a Serial ATA disk via an Intel ICH9 AHCI controller, pass e.g.:
54 -drive if=none,file=disk.img,id=mydisk -device ich9-ahci,id=ahci -device ide-drive,drive=mydisk,bus=ahci.0
55- To add an Intel E1000 network adapter, pass e.g.:
56 -netdev user,id=net0 -device e1000,netdev=net0
57- To add an EHCI-compliant USB host controller, pass e.g.:
58 -device usb-ehci,id=ehci
59- To add a NVMe disk, pass e.g.:
60 -drive if=none,file=disk.img,id=mydisk -device nvme,drive=mydisk,serial=foo
61
62These have been tested in QEMU 2.9.0 but should work in at least 2.5.0 as well.