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u-boot/doc/board/emulation/qemu-arm.rst

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doc: board: Convert README.qemu-arm to reST Convert plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
2019-07-18 07:34:15 +00:00
.. SPDX-License-Identifier: GPL-2.0+
.. Copyright (C) 2017, Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
ARM: Add documentation for the qemu-arm board Add brief documentation for the recently merged qemu-arm board. Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
2017-10-09 16:42:41 +00:00
doc: board: Convert README.qemu-arm to reST Convert plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
2019-07-18 07:34:15 +00:00
QEMU ARM
========
ARM: Add documentation for the qemu-arm board Add brief documentation for the recently merged qemu-arm board. Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
2017-10-09 16:42:41 +00:00
QEMU for ARM supports a special 'virt' machine designed for emulation and
virtualization purposes. This document describes how to run U-Boot under it.
ARM: Document AArch64 version of qemu-arm It's mostly obvious, except that QEMU is annoying and requires an explicit '-cpu cortex-a57' (or some other 64-bit core) to actually run in 64-bit mode. While at it, remove the references to setting the ARCH environment variable; that is not used in U-Boot. Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi> Reviewed-by: Tom Rini <trini@konsulko.com>
2018-01-11 14:11:24 +00:00
Both 32-bit ARM and AArch64 are supported.
ARM: Add documentation for the qemu-arm board Add brief documentation for the recently merged qemu-arm board. Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
2017-10-09 16:42:41 +00:00
The 'virt' platform provides the following as the basic functionality:
- A freely configurable amount of CPU cores
- U-Boot loaded and executing in the emulated flash at address 0x0
- A generated device tree blob placed at the start of RAM
- A freely configurable amount of RAM, described by the DTB
- A PL011 serial port, discoverable via the DTB
ARM: Document AArch64 version of qemu-arm It's mostly obvious, except that QEMU is annoying and requires an explicit '-cpu cortex-a57' (or some other 64-bit core) to actually run in 64-bit mode. While at it, remove the references to setting the ARCH environment variable; that is not used in U-Boot. Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi> Reviewed-by: Tom Rini <trini@konsulko.com>
2018-01-11 14:11:24 +00:00
- An ARMv7/ARMv8 architected timer
ARM: Add documentation for the qemu-arm board Add brief documentation for the recently merged qemu-arm board. Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
2017-10-09 16:42:41 +00:00
- PSCI for rebooting the system
- A generic ECAM-based PCI host controller, discoverable via the DTB
Additionally, a number of optional peripherals can be added to the PCI bus.
Building U-Boot
---------------
ARM: Document AArch64 version of qemu-arm It's mostly obvious, except that QEMU is annoying and requires an explicit '-cpu cortex-a57' (or some other 64-bit core) to actually run in 64-bit mode. While at it, remove the references to setting the ARCH environment variable; that is not used in U-Boot. Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi> Reviewed-by: Tom Rini <trini@konsulko.com>
2018-01-11 14:11:24 +00:00
Set the CROSS_COMPILE environment variable as usual, and run:
ARM: Add documentation for the qemu-arm board Add brief documentation for the recently merged qemu-arm board. Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
2017-10-09 16:42:41 +00:00
doc: board: Convert README.qemu-arm to reST Convert plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
2019-07-18 07:34:15 +00:00
- For ARM::
ARM: Add documentation for the qemu-arm board Add brief documentation for the recently merged qemu-arm board. Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
2017-10-09 16:42:41 +00:00
make qemu_arm_defconfig
make
doc: board: Convert README.qemu-arm to reST Convert plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
2019-07-18 07:34:15 +00:00
- For AArch64::
ARM: Document AArch64 version of qemu-arm It's mostly obvious, except that QEMU is annoying and requires an explicit '-cpu cortex-a57' (or some other 64-bit core) to actually run in 64-bit mode. While at it, remove the references to setting the ARCH environment variable; that is not used in U-Boot. Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi> Reviewed-by: Tom Rini <trini@konsulko.com>
2018-01-11 14:11:24 +00:00
make qemu_arm64_defconfig
make
ARM: Add documentation for the qemu-arm board Add brief documentation for the recently merged qemu-arm board. Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
2017-10-09 16:42:41 +00:00
Running U-Boot
--------------
The minimal QEMU command line to get U-Boot up and running is:
doc: board: Convert README.qemu-arm to reST Convert plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
2019-07-18 07:34:15 +00:00
- For ARM::
doc: qemu-arm: Drop highmem=off references Now that U-Boot works fine with highmem enabled, there is no need to tell users to disable highmem. Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-05-14 15:47:52 +00:00
qemu-system-arm -machine virt -bios u-boot.bin
ARM: Add documentation for the qemu-arm board Add brief documentation for the recently merged qemu-arm board. Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
2017-10-09 16:42:41 +00:00
doc: board: Convert README.qemu-arm to reST Convert plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
2019-07-18 07:34:15 +00:00
- For AArch64::
doc: qemu-arm: Drop highmem=off references Now that U-Boot works fine with highmem enabled, there is no need to tell users to disable highmem. Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-05-14 15:47:52 +00:00
qemu-system-aarch64 -machine virt -cpu cortex-a57 -bios u-boot.bin
ARM: Document AArch64 version of qemu-arm It's mostly obvious, except that QEMU is annoying and requires an explicit '-cpu cortex-a57' (or some other 64-bit core) to actually run in 64-bit mode. While at it, remove the references to setting the ARCH environment variable; that is not used in U-Boot. Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi> Reviewed-by: Tom Rini <trini@konsulko.com>
2018-01-11 14:11:24 +00:00
doc: qemu-arm: Drop highmem=off references Now that U-Boot works fine with highmem enabled, there is no need to tell users to disable highmem. Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-05-14 15:47:52 +00:00
Note that for some odd reason qemu-system-aarch64 needs to be explicitly
ARM: Document AArch64 version of qemu-arm It's mostly obvious, except that QEMU is annoying and requires an explicit '-cpu cortex-a57' (or some other 64-bit core) to actually run in 64-bit mode. While at it, remove the references to setting the ARCH environment variable; that is not used in U-Boot. Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi> Reviewed-by: Tom Rini <trini@konsulko.com>
2018-01-11 14:11:24 +00:00
told to use a 64-bit CPU or it will boot in 32-bit mode.
ARM: Add documentation for the qemu-arm board Add brief documentation for the recently merged qemu-arm board. Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
2017-10-09 16:42:41 +00:00
qemu-arm: Add persistent environment support Currently on qemu-arm platforms environment is kept in RAM. Instead use pflash device 1 to provide persistent environment support across device reset. Also (optionally) provide support for persistent environment across qemu machine OFF/ON using following instructions: - Create envstore.img using qemu-img: qemu-img create -f raw envstore.img 64M - Add a pflash drive parameter to the command line: -drive if=pflash,format=raw,index=1,file=envstore.img Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
2018-11-26 11:20:17 +00:00
Additional persistent U-boot environment support can be added as follows:
doc: board: Convert README.qemu-arm to reST Convert plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
2019-07-18 07:34:15 +00:00
- Create envstore.img using qemu-img::
qemu-arm: Add persistent environment support Currently on qemu-arm platforms environment is kept in RAM. Instead use pflash device 1 to provide persistent environment support across device reset. Also (optionally) provide support for persistent environment across qemu machine OFF/ON using following instructions: - Create envstore.img using qemu-img: qemu-img create -f raw envstore.img 64M - Add a pflash drive parameter to the command line: -drive if=pflash,format=raw,index=1,file=envstore.img Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
2018-11-26 11:20:17 +00:00
qemu-img create -f raw envstore.img 64M
doc: board: Convert README.qemu-arm to reST Convert plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
2019-07-18 07:34:15 +00:00
- Add a pflash drive parameter to the command line::
qemu-arm: Add persistent environment support Currently on qemu-arm platforms environment is kept in RAM. Instead use pflash device 1 to provide persistent environment support across device reset. Also (optionally) provide support for persistent environment across qemu machine OFF/ON using following instructions: - Create envstore.img using qemu-img: qemu-img create -f raw envstore.img 64M - Add a pflash drive parameter to the command line: -drive if=pflash,format=raw,index=1,file=envstore.img Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
2018-11-26 11:20:17 +00:00
-drive if=pflash,format=raw,index=1,file=envstore.img
ARM: Add documentation for the qemu-arm board Add brief documentation for the recently merged qemu-arm board. Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
2017-10-09 16:42:41 +00:00
Additional peripherals that have been tested to work in both U-Boot and Linux
can be enabled with the following command line parameters:
doc: board: Convert README.qemu-arm to reST Convert plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
2019-07-18 07:34:15 +00:00
- To add a Serial ATA disk via an Intel ICH9 AHCI controller, pass e.g.::
ARM: Add documentation for the qemu-arm board Add brief documentation for the recently merged qemu-arm board. Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
2017-10-09 16:42:41 +00:00
-drive if=none,file=disk.img,id=mydisk -device ich9-ahci,id=ahci -device ide-drive,drive=mydisk,bus=ahci.0
doc: board: Convert README.qemu-arm to reST Convert plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
2019-07-18 07:34:15 +00:00
- To add an Intel E1000 network adapter, pass e.g.::
ARM: Add documentation for the qemu-arm board Add brief documentation for the recently merged qemu-arm board. Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
2017-10-09 16:42:41 +00:00
-netdev user,id=net0 -device e1000,netdev=net0
doc: board: Convert README.qemu-arm to reST Convert plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
2019-07-18 07:34:15 +00:00
- To add an EHCI-compliant USB host controller, pass e.g.::
ARM: Add documentation for the qemu-arm board Add brief documentation for the recently merged qemu-arm board. Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
2017-10-09 16:42:41 +00:00
-device usb-ehci,id=ehci
doc: board: Convert README.qemu-arm to reST Convert plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
2019-07-18 07:34:15 +00:00
- To add a NVMe disk, pass e.g.::
ARM: Add documentation for the qemu-arm board Add brief documentation for the recently merged qemu-arm board. Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
2017-10-09 16:42:41 +00:00
-drive if=none,file=disk.img,id=mydisk -device nvme,drive=mydisk,serial=foo
These have been tested in QEMU 2.9.0 but should work in at least 2.5.0 as well.
doc: qemu: debug UART settings for QEMU ARM virt Provide the settings for the debug UART on the QEMU ARM virt board. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2020-09-15 22:17:55 +00:00
Debug UART
----------
The debug UART on the ARM virt board uses these settings::
CONFIG_DEBUG_UART=y
CONFIG_DEBUG_UART_PL010=y
CONFIG_DEBUG_UART_BASE=0x9000000
CONFIG_DEBUG_UART_CLOCK=0
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