1* Nios II Processor Binding 2 3This binding specifies what properties available in the device tree 4representation of a Nios II Processor Core. 5 6Users can use sopc2dts tool for generating device tree sources (dts) from a 7Qsys system. See more detail in: http://www.alterawiki.com/wiki/Sopc2dts 8 9Required properties: 10 11- compatible: Compatible property value should be "altr,nios2-1.0". 12- reg: Contains CPU index. 13- interrupt-controller: Specifies that the node is an interrupt controller 14- #interrupt-cells: Specifies the number of cells needed to encode an 15 interrupt source, should be 1. 16- clock-frequency: Contains the clock frequency for CPU, in Hz. 17- dcache-line-size: Contains data cache line size. 18- icache-line-size: Contains instruction line size. 19- dcache-size: Contains data cache size. 20- icache-size: Contains instruction cache size. 21- altr,pid-num-bits: Specifies the number of bits to use to represent the process 22 identifier (PID). 23- altr,tlb-num-ways: Specifies the number of set-associativity ways in the TLB. 24- altr,tlb-num-entries: Specifies the number of entries in the TLB. 25- altr,tlb-ptr-sz: Specifies size of TLB pointer. 26- altr,has-mul: Specifies CPU hardware multipy support, should be 1. 27- altr,has-mmu: Specifies CPU support MMU support, should be 1. 28- altr,has-initda: Specifies CPU support initda instruction, should be 1. 29- altr,reset-addr: Specifies CPU reset address 30- altr,fast-tlb-miss-addr: Specifies CPU fast TLB miss exception address 31- altr,exception-addr: Specifies CPU exception address 32 33Optional properties: 34- altr,has-div: Specifies CPU hardware divide support 35- altr,implementation: Nios II core implementation, this should be "fast"; 36 37Example: 38 39cpu@0x0 { 40 device_type = "cpu"; 41 compatible = "altr,nios2-1.0"; 42 reg = <0>; 43 interrupt-controller; 44 #interrupt-cells = <1>; 45 clock-frequency = <125000000>; 46 dcache-line-size = <32>; 47 icache-line-size = <32>; 48 dcache-size = <32768>; 49 icache-size = <32768>; 50 altr,implementation = "fast"; 51 altr,pid-num-bits = <8>; 52 altr,tlb-num-ways = <16>; 53 altr,tlb-num-entries = <128>; 54 altr,tlb-ptr-sz = <7>; 55 altr,has-div = <1>; 56 altr,has-mul = <1>; 57 altr,reset-addr = <0xc2800000>; 58 altr,fast-tlb-miss-addr = <0xc7fff400>; 59 altr,exception-addr = <0xd0000020>; 60 altr,has-initda = <1>; 61 altr,has-mmu = <1>; 62}; 63