1*4882a593Smuzhiyun.. SPDX-License-Identifier: GPL-2.0 2*4882a593Smuzhiyun 3*4882a593SmuzhiyunDeviceTree Booting 4*4882a593Smuzhiyun------------------ 5*4882a593Smuzhiyun 6*4882a593Smuzhiyun Device-tree compatible SH bootloaders are expected to provide the physical 7*4882a593Smuzhiyun address of the device tree blob in r4. Since legacy bootloaders did not 8*4882a593Smuzhiyun guarantee any particular initial register state, kernels built to 9*4882a593Smuzhiyun inter-operate with old bootloaders must either use a builtin DTB or 10*4882a593Smuzhiyun select a legacy board option (something other than CONFIG_SH_DEVICE_TREE) 11*4882a593Smuzhiyun that does not use device tree. Support for the latter is being phased out 12*4882a593Smuzhiyun in favor of device tree. 13