1ddc92becSStafford HorneOpenRISC Generic SoC 2ddc92becSStafford Horne==================== 3ddc92becSStafford Horne 4ddc92becSStafford HorneBoards and FPGA SoC's which support the OpenRISC standard platform. The 5ddc92becSStafford Horneplatform essentially follows the conventions of the OpenRISC architecture 6ddc92becSStafford Hornespecification, however some aspects, such as the boot protocol have been defined 7ddc92becSStafford Horneby the Linux port. 8ddc92becSStafford Horne 9ddc92becSStafford HorneRequired properties 10ddc92becSStafford Horne------------------- 11ddc92becSStafford Horne - compatible: Must include "opencores,or1ksim" 12ddc92becSStafford Horne 13ddc92becSStafford HorneCPU nodes: 14ddc92becSStafford Horne---------- 15ddc92becSStafford HorneA "cpus" node is required. Required properties: 16ddc92becSStafford Horne - #address-cells: Must be 1. 17ddc92becSStafford Horne - #size-cells: Must be 0. 18ddc92becSStafford HorneA CPU sub-node is also required for at least CPU 0. Since the topology may 19ddc92becSStafford Hornebe probed via CPS, it is not necessary to specify secondary CPUs. Required 20ddc92becSStafford Horneproperties: 21ddc92becSStafford Horne - compatible: Must be "opencores,or1200-rtlsvn481". 22ddc92becSStafford Horne - reg: CPU number. 23ddc92becSStafford Horne - clock-frequency: The CPU clock frequency in Hz. 24ddc92becSStafford HorneExample: 25ddc92becSStafford Horne cpus { 26ddc92becSStafford Horne #address-cells = <1>; 27ddc92becSStafford Horne #size-cells = <0>; 28ddc92becSStafford Horne cpu@0 { 29ddc92becSStafford Horne compatible = "opencores,or1200-rtlsvn481"; 30ddc92becSStafford Horne reg = <0>; 31ddc92becSStafford Horne clock-frequency = <20000000>; 32ddc92becSStafford Horne }; 33ddc92becSStafford Horne }; 34ddc92becSStafford Horne 35ddc92becSStafford Horne 36ddc92becSStafford HorneBoot protocol 37ddc92becSStafford Horne------------- 38ddc92becSStafford HorneThe bootloader may pass the following arguments to the kernel: 39ddc92becSStafford Horne - r3: address of a flattened device-tree blob or 0x0. 40