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- .. SPDX-License-Identifier: GPL-2.0+:
- bootz command
- =============
- Synopsis
- --------
- ::
- bootz [<addr> [<initrd>[:<size>]] [<fdt>]]
- Description
- -----------
- The bootz command is used to boot a Linux kernel in 'zImage' format.
- addr
- address of kernel image, defaults to the value of the environment
- variable $loadaddr.
- initrd
- address of the initial RAM disk. Use '-' to boot a kernel with a device
- tree but without an initial RAM disk.
- size
- size of the initial RAM disk. This parameter must be specified for raw
- initial RAM disks.
- fdt
- address of the device tree.
- Example
- -------
- This is the boot log of an OrangePi PC board:
- ::
- => load mmc 0:2 $fdt_addr_r dtb
- 23093 bytes read in 7 ms (3.1 MiB/s)
- => load mmc 0:2 $kernel_addr_r vmlinuz
- 5079552 bytes read in 215 ms (22.5 MiB/s)
- => load mmc 0:2 $ramdisk_addr_r initrd.img
- 23854965 bytes read in 995 ms (22.9 MiB/s)
- => bootz $kernel_addr_r $ramdisk_addr_r:$filesize $fdt_addr_r
- Kernel image @ 0x42000000 [ 0x000000 - 0x4d8200 ]
- ## Flattened Device Tree blob at 43000000
- Booting using the fdt blob at 0x43000000
- EHCI failed to shut down host controller.
- Loading Ramdisk to 48940000, end 49ffff75 ... OK
- Loading Device Tree to 48937000, end 4893fa34 ... OK
- Starting kernel ...
- Configuration
- -------------
- The bootz command is only available if CONFIG_CMD_BOOTZ=y.
- Return value
- ------------
- Normally this command does not return. If an error occurs, the return value $?
- is set to 1 (false). If the operating system returns to U-Boot, the system is
- reset.
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