Based on kernel version 4.16.1. Page generated on 2018-04-09 11:52 EST.
1 UniPhier outer cache controller 2 3 UniPhier SoCs are integrated with a full-custom outer cache controller system. 4 All of them have a level 2 cache controller, and some have a level 3 cache 5 controller as well. 6 7 Required properties: 8 - compatible: should be "socionext,uniphier-system-cache" 9 - reg: offsets and lengths of the register sets for the device. It should 10 contain 3 regions: control register, revision register, operation register, 11 in this order. 12 - cache-unified: specifies the cache is a unified cache. 13 - cache-size: specifies the size in bytes of the cache 14 - cache-sets: specifies the number of associativity sets of the cache 15 - cache-line-size: specifies the line size in bytes 16 - cache-level: specifies the level in the cache hierarchy. The value should 17 be 2 for L2 cache, 3 for L3 cache, etc. 18 19 Optional properties: 20 - next-level-cache: phandle to the next level cache if present. The next level 21 cache should be also compatible with "socionext,uniphier-system-cache". 22 23 The L2 cache must exist to use the L3 cache; the cache hierarchy must be 24 indicated correctly with "next-level-cache" properties. 25 26 Example 1 (system with L2): 27 l2: l2-cache@500c0000 { 28 compatible = "socionext,uniphier-system-cache"; 29 reg = <0x500c0000 0x2000>, <0x503c0100 0x4>, 30 <0x506c0000 0x400>; 31 cache-unified; 32 cache-size = <0x80000>; 33 cache-sets = <256>; 34 cache-line-size = <128>; 35 cache-level = <2>; 36 }; 37 38 Example 2 (system with L2 and L3): 39 l2: l2-cache@500c0000 { 40 compatible = "socionext,uniphier-system-cache"; 41 reg = <0x500c0000 0x2000>, <0x503c0100 0x8>, 42 <0x506c0000 0x400>; 43 cache-unified; 44 cache-size = <0x200000>; 45 cache-sets = <512>; 46 cache-line-size = <128>; 47 cache-level = <2>; 48 next-level-cache = <&l3>; 49 }; 50 51 l3: l3-cache@500c8000 { 52 compatible = "socionext,uniphier-system-cache"; 53 reg = <0x500c8000 0x2000>, <0x503c8100 0x8>, 54 <0x506c8000 0x400>; 55 cache-unified; 56 cache-size = <0x400000>; 57 cache-sets = <512>; 58 cache-line-size = <256>; 59 cache-level = <3>; 60 };