| .. 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. |
