| .. SPDX-License-Identifier: GPL-2.0+: | |
| .. index:: | |
| single: bootz (command) | |
| 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. |