| Bin Meng | ddec5e9 | 2019-07-18 00:34:15 -0700 | [diff] [blame] | 1 | .. SPDX-License-Identifier: GPL-2.0+ |
| 2 | .. Copyright (C) 2017, Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi> |
| Tuomas Tynkkynen | a1c2178 | 2017-10-09 19:42:41 +0300 | [diff] [blame] | 3 | |
| Bin Meng | ddec5e9 | 2019-07-18 00:34:15 -0700 | [diff] [blame] | 4 | QEMU ARM |
| 5 | ======== |
| Tuomas Tynkkynen | a1c2178 | 2017-10-09 19:42:41 +0300 | [diff] [blame] | 6 | |
| 7 | QEMU for ARM supports a special 'virt' machine designed for emulation and |
| 8 | virtualization purposes. This document describes how to run U-Boot under it. |
| Tuomas Tynkkynen | 87145cf | 2018-01-11 16:11:24 +0200 | [diff] [blame] | 9 | Both 32-bit ARM and AArch64 are supported. |
| Tuomas Tynkkynen | a1c2178 | 2017-10-09 19:42:41 +0300 | [diff] [blame] | 10 | |
| 11 | The 'virt' platform provides the following as the basic functionality: |
| 12 | |
| 13 | - A freely configurable amount of CPU cores |
| 14 | - U-Boot loaded and executing in the emulated flash at address 0x0 |
| 15 | - A generated device tree blob placed at the start of RAM |
| 16 | - A freely configurable amount of RAM, described by the DTB |
| 17 | - A PL011 serial port, discoverable via the DTB |
| Tuomas Tynkkynen | 87145cf | 2018-01-11 16:11:24 +0200 | [diff] [blame] | 18 | - An ARMv7/ARMv8 architected timer |
| Tuomas Tynkkynen | a1c2178 | 2017-10-09 19:42:41 +0300 | [diff] [blame] | 19 | - PSCI for rebooting the system |
| 20 | - A generic ECAM-based PCI host controller, discoverable via the DTB |
| 21 | |
| 22 | Additionally, a number of optional peripherals can be added to the PCI bus. |
| 23 | |
| 24 | Building U-Boot |
| 25 | --------------- |
| Tuomas Tynkkynen | 87145cf | 2018-01-11 16:11:24 +0200 | [diff] [blame] | 26 | Set the CROSS_COMPILE environment variable as usual, and run: |
| Tuomas Tynkkynen | a1c2178 | 2017-10-09 19:42:41 +0300 | [diff] [blame] | 27 | |
| Bin Meng | ddec5e9 | 2019-07-18 00:34:15 -0700 | [diff] [blame] | 28 | - For ARM:: |
| 29 | |
| Tuomas Tynkkynen | a1c2178 | 2017-10-09 19:42:41 +0300 | [diff] [blame] | 30 | make qemu_arm_defconfig |
| 31 | make |
| 32 | |
| Bin Meng | ddec5e9 | 2019-07-18 00:34:15 -0700 | [diff] [blame] | 33 | - For AArch64:: |
| 34 | |
| Tuomas Tynkkynen | 87145cf | 2018-01-11 16:11:24 +0200 | [diff] [blame] | 35 | make qemu_arm64_defconfig |
| 36 | make |
| 37 | |
| Tuomas Tynkkynen | a1c2178 | 2017-10-09 19:42:41 +0300 | [diff] [blame] | 38 | Running U-Boot |
| 39 | -------------- |
| 40 | The minimal QEMU command line to get U-Boot up and running is: |
| 41 | |
| Bin Meng | ddec5e9 | 2019-07-18 00:34:15 -0700 | [diff] [blame] | 42 | - For ARM:: |
| 43 | |
| Tuomas Tynkkynen | 9cd7ac9 | 2018-05-14 18:47:52 +0300 | [diff] [blame] | 44 | qemu-system-arm -machine virt -bios u-boot.bin |
| Tuomas Tynkkynen | a1c2178 | 2017-10-09 19:42:41 +0300 | [diff] [blame] | 45 | |
| Bin Meng | ddec5e9 | 2019-07-18 00:34:15 -0700 | [diff] [blame] | 46 | - For AArch64:: |
| 47 | |
| Tuomas Tynkkynen | 9cd7ac9 | 2018-05-14 18:47:52 +0300 | [diff] [blame] | 48 | qemu-system-aarch64 -machine virt -cpu cortex-a57 -bios u-boot.bin |
| Tuomas Tynkkynen | 87145cf | 2018-01-11 16:11:24 +0200 | [diff] [blame] | 49 | |
| Tuomas Tynkkynen | 9cd7ac9 | 2018-05-14 18:47:52 +0300 | [diff] [blame] | 50 | Note that for some odd reason qemu-system-aarch64 needs to be explicitly |
| Tuomas Tynkkynen | 87145cf | 2018-01-11 16:11:24 +0200 | [diff] [blame] | 51 | told to use a 64-bit CPU or it will boot in 32-bit mode. |
| Tuomas Tynkkynen | a1c2178 | 2017-10-09 19:42:41 +0300 | [diff] [blame] | 52 | |
| Sumit Garg | 9b614ea | 2018-11-26 16:50:17 +0530 | [diff] [blame] | 53 | Additional persistent U-boot environment support can be added as follows: |
| Bin Meng | ddec5e9 | 2019-07-18 00:34:15 -0700 | [diff] [blame] | 54 | |
| 55 | - Create envstore.img using qemu-img:: |
| 56 | |
| Sumit Garg | 9b614ea | 2018-11-26 16:50:17 +0530 | [diff] [blame] | 57 | qemu-img create -f raw envstore.img 64M |
| Bin Meng | ddec5e9 | 2019-07-18 00:34:15 -0700 | [diff] [blame] | 58 | |
| 59 | - Add a pflash drive parameter to the command line:: |
| 60 | |
| Sumit Garg | 9b614ea | 2018-11-26 16:50:17 +0530 | [diff] [blame] | 61 | -drive if=pflash,format=raw,index=1,file=envstore.img |
| 62 | |
| Tuomas Tynkkynen | a1c2178 | 2017-10-09 19:42:41 +0300 | [diff] [blame] | 63 | Additional peripherals that have been tested to work in both U-Boot and Linux |
| 64 | can be enabled with the following command line parameters: |
| 65 | |
| Bin Meng | ddec5e9 | 2019-07-18 00:34:15 -0700 | [diff] [blame] | 66 | - To add a Serial ATA disk via an Intel ICH9 AHCI controller, pass e.g.:: |
| 67 | |
| Tuomas Tynkkynen | a1c2178 | 2017-10-09 19:42:41 +0300 | [diff] [blame] | 68 | -drive if=none,file=disk.img,id=mydisk -device ich9-ahci,id=ahci -device ide-drive,drive=mydisk,bus=ahci.0 |
| Bin Meng | ddec5e9 | 2019-07-18 00:34:15 -0700 | [diff] [blame] | 69 | |
| 70 | - To add an Intel E1000 network adapter, pass e.g.:: |
| 71 | |
| Tuomas Tynkkynen | a1c2178 | 2017-10-09 19:42:41 +0300 | [diff] [blame] | 72 | -netdev user,id=net0 -device e1000,netdev=net0 |
| Bin Meng | ddec5e9 | 2019-07-18 00:34:15 -0700 | [diff] [blame] | 73 | |
| 74 | - To add an EHCI-compliant USB host controller, pass e.g.:: |
| 75 | |
| Tuomas Tynkkynen | a1c2178 | 2017-10-09 19:42:41 +0300 | [diff] [blame] | 76 | -device usb-ehci,id=ehci |
| Bin Meng | ddec5e9 | 2019-07-18 00:34:15 -0700 | [diff] [blame] | 77 | |
| 78 | - To add a NVMe disk, pass e.g.:: |
| 79 | |
| Tuomas Tynkkynen | a1c2178 | 2017-10-09 19:42:41 +0300 | [diff] [blame] | 80 | -drive if=none,file=disk.img,id=mydisk -device nvme,drive=mydisk,serial=foo |
| 81 | |
| 82 | These have been tested in QEMU 2.9.0 but should work in at least 2.5.0 as well. |
| Heinrich Schuchardt | d4a7fc1 | 2020-09-16 00:17:55 +0200 | [diff] [blame] | 83 | |
| 84 | Debug UART |
| 85 | ---------- |
| 86 | |
| 87 | The debug UART on the ARM virt board uses these settings:: |
| 88 | |
| 89 | CONFIG_DEBUG_UART=y |
| 90 | CONFIG_DEBUG_UART_PL010=y |
| 91 | CONFIG_DEBUG_UART_BASE=0x9000000 |
| 92 | CONFIG_DEBUG_UART_CLOCK=0 |