1 Freescale Peripheral Management Access Unit (PAMU) Device Tree Binding
5 The PAMU is an I/O MMU that provides device-to-memory access control and
6 address translation capabilities.
10 - compatible : <string>
11 First entry is a version-specific string, such as
12 "fsl,pamu-v1.0". The second is "fsl,pamu".
13 - ranges : <prop-encoded-array>
14 A standard property. Utilized to describe the memory mapped
15 I/O space utilized by the controller. The size should
16 be set to the total size of the register space of all
17 physically present PAMU controllers. For example, for
18 PAMU v1.0, on an SOC that has five PAMU devices, the size
20 - interrupts : <prop-encoded-array>
21 Interrupt mappings. The first tuple is the normal PAMU
22 interrupt, used for reporting access violations. The second
23 is for PAMU hardware errors, such as PAMU operation errors
25 - #address-cells: <u32>
31 - reg : <prop-encoded-array>
32 A standard property. It represents the CCSR registers of
33 all child PAMUs combined. Include it to provide support
35 - interrupt-parent : <phandle>
36 Phandle to interrupt controller
37 - fsl,portid-mapping : <u32>
38 The Coherency Subdomain ID Port Mapping Registers and
39 Snoop ID Port Mapping registers, which are part of the
40 CoreNet Coherency fabric (CCF), provide a CoreNet
41 Coherency Subdomain ID/CoreNet Snoop ID to pamu mapping
42 functions. Certain bits from these registers should be
43 set if PAMUs should be snooped. This property defines
44 a bitmask which selects the bits that should be set if
45 PAMUs should be snooped.
49 Each child node represents one PAMU controller. Each SOC device that is
50 connected to a specific PAMU device should have a "fsl,pamu-phandle" property
51 that links to the corresponding specific child PAMU controller.
53 - reg : <prop-encoded-array>
54 A standard property. Specifies the physical address and
55 length (relative to the parent 'ranges' property) of this
56 PAMU controller's configuration registers. The size should
57 be set to the size of this PAMU controllers's register space.
58 For PAMU v1.0, this size is 0x1000.
59 - fsl,primary-cache-geometry
60 : <prop-encoded-array>
61 Two cells that specify the geometry of the primary PAMU
62 cache. The first is the number of cache lines, and the
63 second is the number of "ways". For direct-mapped caches,
65 - fsl,secondary-cache-geometry
66 : <prop-encoded-array>
67 Two cells that specify the geometry of the secondary PAMU
68 cache. The first is the number of cache lines, and the
69 second is the number of "ways". For direct-mapped caches,
74 Devices that have LIODNs need to specify links to the parent PAMU controller
75 (the actual PAMU controller that this device is connected to) and a pointer to
76 the LIODN register, if applicable.
80 Phandle to the single, specific PAMU controller node to which
81 this device is connect. The PAMU topology is represented in
82 the device tree to assist code that dynamically determines the
83 best LIODN values to minimize PAMU cache thrashing.
85 - fsl,liodn-reg : <prop-encoded-array>
86 Two cells that specify the location of the LIODN register
87 for this device. Required for devices that have a single
88 LIODN. The first cell is a phandle to a node that contains
89 the registers where the LIODN is to be set. The second is
90 the offset from the first "reg" resource of the node where
91 the specific LIODN register is located.
97 compatible = "fsl,pamu-v1.0", "fsl,pamu";
98 reg = <0x20000 0x5000>;
99 ranges = <0 0x20000 0x5000>;
100 fsl,portid-mapping = <0xf80000>;
101 #address-cells = <1>;
109 fsl,primary-cache-geometry = <32 1>;
110 fsl,secondary-cache-geometry = <128 2>;
114 reg = <0x1000 0x1000>;
115 fsl,primary-cache-geometry = <32 1>;
116 fsl,secondary-cache-geometry = <128 2>;
120 reg = <0x2000 0x1000>;
121 fsl,primary-cache-geometry = <32 1>;
122 fsl,secondary-cache-geometry = <128 2>;
126 reg = <0x3000 0x1000>;
127 fsl,primary-cache-geometry = <32 1>;
128 fsl,secondary-cache-geometry = <128 2>;
132 reg = <0x4000 0x1000>;
133 fsl,primary-cache-geometry = <32 1>;
134 fsl,secondary-cache-geometry = <128 2>;
138 guts: global-utilities@e0000 {
139 compatible = "fsl,qoriq-device-config-1.0";
140 reg = <0xe0000 0xe00>;
143 fsl,liodn-bits = <12>;
146 /include/ "qoriq-dma-0.dtsi"
148 fsl,iommu-parent = <&pamu0>;
149 fsl,liodn-reg = <&guts 0x584>; /* DMA2LIODNR */