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Some files have an associated address. Show this with the 'qfw list' command so that it is possible to dump the data. Note that the reference to 'md' is for the md.rst file, not a markdown file. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
92 lines
2.4 KiB
ReStructuredText
92 lines
2.4 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0+
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qfw command
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===========
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Synopsis
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--------
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::
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qfw list
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qfw cpus
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qfw load [kernel_addr [initrd_addr]]
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Description
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-----------
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The *qfw* command is used to retrieve information form the QEMU firmware.
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The *qfw list* sub-command displays the QEMU firmware files.
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The *qfw cpus* sub-command displays the available CPUs.
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The *qfw load* command is used to load a kernel and an initial RAM disk.
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kernel_addr
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address to which the file specified by the -kernel parameter of QEMU shall
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be loaded. Defaults to environment variable *loadaddr* and further to
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the value of *CONFIG_SYS_LOAD_ADDR*.
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initrd_addr
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address to which the file specified by the -initrd parameter of QEMU shall
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be loaded. Defaults to environment variable *ramdiskaddr* and further to
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the value of *CFG_RAMDISK_ADDR*.
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Examples
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--------
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QEMU firmware files are listed via the *qfw list* command:
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::
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=> qfw list
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00000000 bios-geometry
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00000000 bootorder
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000f0060 etc/acpi/rsdp
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bed14040 etc/acpi/tables
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00000000 etc/boot-fail-wait
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00000000 etc/e820
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00000000 etc/smbios/smbios-anchor
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00000000 etc/smbios/smbios-tables
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00000000 etc/system-states
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00000000 etc/table-loader
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00000000 etc/tpm/log
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00000000 genroms/kvmvapic.bin
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Where an address is shown, it indicates where the data is available for
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inspection, e.g. using the :doc:`md`.
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The available CPUs can be shown via the *qfw cpus* command:
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::
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=> qfw cpu
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2 cpu(s) online
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The *-kernel* and *-initrd* parameters allow to specify a kernel and an
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initial RAM disk for QEMU:
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.. code-block:: bash
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$ qemu-system-x86_64 -machine pc-i440fx-2.5 -bios u-boot.rom -m 1G \
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-nographic -kernel vmlinuz -initrd initrd
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Now the kernel and the initial RAM disk can be loaded to the U-Boot memory via
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the *qfw load* command and booted thereafter.
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::
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=> qfw load ${kernel_addr_r} ${ramdisk_addr_r}
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loading kernel to address 0000000001000000 size 5048f0 initrd 0000000004000000 size 3c94891
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=> zboot 1000000 5048f0 4000000 3c94891
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Valid Boot Flag
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Magic signature found
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Linux kernel version 4.19.0-14-amd64 (debian-kernel@lists.debian.org) #1 SMP Debian 4.19.171-2 (2021-01-30)
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Building boot_params at 0x00090000
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Loading bzImage at address 100000 (5260160 bytes)
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Configuration
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-------------
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The qfw command is only available if CONFIG_CMD_QFW=y.
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