1OpenRISC Generic SoC 2==================== 3 4Boards and FPGA SoC's which support the OpenRISC standard platform. The 5platform essentially follows the conventions of the OpenRISC architecture 6specification, however some aspects, such as the boot protocol have been defined 7by the Linux port. 8 9Required properties 10------------------- 11 - compatible: Must include "opencores,or1ksim" 12 13CPU nodes: 14---------- 15A "cpus" node is required. Required properties: 16 - #address-cells: Must be 1. 17 - #size-cells: Must be 0. 18A CPU sub-node is also required for at least CPU 0. Since the topology may 19be probed via CPS, it is not necessary to specify secondary CPUs. Required 20properties: 21 - compatible: Must be "opencores,or1200-rtlsvn481". 22 - reg: CPU number. 23 - clock-frequency: The CPU clock frequency in Hz. 24Example: 25 cpus { 26 #address-cells = <1>; 27 #size-cells = <0>; 28 cpu@0 { 29 compatible = "opencores,or1200-rtlsvn481"; 30 reg = <0>; 31 clock-frequency = <20000000>; 32 }; 33 }; 34 35 36Boot protocol 37------------- 38The bootloader may pass the following arguments to the kernel: 39 - r3: address of a flattened device-tree blob or 0x0. 40