1*d47a97bdSJonathan Corbet.. SPDX-License-Identifier: GPL-2.0 2*d47a97bdSJonathan Corbet 3*d47a97bdSJonathan CorbetDeviceTree Booting 4*d47a97bdSJonathan Corbet------------------ 5*d47a97bdSJonathan Corbet 6*d47a97bdSJonathan Corbet Device-tree compatible SH bootloaders are expected to provide the physical 7*d47a97bdSJonathan Corbet address of the device tree blob in r4. Since legacy bootloaders did not 8*d47a97bdSJonathan Corbet guarantee any particular initial register state, kernels built to 9*d47a97bdSJonathan Corbet inter-operate with old bootloaders must either use a builtin DTB or 10*d47a97bdSJonathan Corbet select a legacy board option (something other than CONFIG_SH_DEVICE_TREE) 11*d47a97bdSJonathan Corbet that does not use device tree. Support for the latter is being phased out 12*d47a97bdSJonathan Corbet in favor of device tree. 13