DeviceTree Booting¶

Device-tree compatible SH bootloaders are expected to provide the physicaladdress of the device tree blob in r4. Since legacy bootloaders did notguarantee any particular initial register state, kernels built tointer-operate with old bootloaders must either use a builtin DTB orselect a legacy board option (something other than CONFIG_SH_DEVICE_TREE)that does not use device tree. Support for the latter is being phased outin favor of device tree.