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diff --git a/doc/usage/cmd/bootz.rst b/doc/usage/cmd/bootz.rst new file mode 100644 index 0000000000..78953e9ca2 --- /dev/null +++ b/doc/usage/cmd/bootz.rst @@ -0,0 +1,66 @@ +.. 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. |