1 Freescale Peripheral Management Access Unit (P
2
3 DESCRIPTION
4
5 The PAMU is an I/O MMU that provides device-to
6 address translation capabilities.
7
8 Required properties:
9
10 - compatible : <string>
11 First entry is a version-spe
12 "fsl,pamu-v1.0". The second
13 - ranges : <prop-encoded-array>
14 A standard property. Utilize
15 I/O space utilized by the co
16 be set to the total size of
17 physically present PAMU cont
18 PAMU v1.0, on an SOC that ha
19 is 0x5000.
20 - interrupts : <prop-encoded-array>
21 Interrupt mappings. The fir
22 interrupt, used for reportin
23 is for PAMU hardware errors,
24 and ECC errors.
25 - #address-cells: <u32>
26 A standard property.
27 - #size-cells : <u32>
28 A standard property.
29
30 Optional properties:
31 - reg : <prop-encoded-array>
32 A standard property. It re
33 all child PAMUs combined. I
34 for legacy drivers.
35 - fsl,portid-mapping : <u32>
36 The Coherency Subdomain ID P
37 Snoop ID Port Mapping regist
38 CoreNet Coherency fabric (CC
39 Coherency Subdomain ID/CoreN
40 functions. Certain bits fro
41 set if PAMUs should be snoop
42 a bitmask which selects the
43 PAMUs should be snooped.
44
45 Child nodes:
46
47 Each child node represents one PAMU controller
48 connected to a specific PAMU device should hav
49 that links to the corresponding specific child
50
51 - reg : <prop-encoded-array>
52 A standard property. Specif
53 length (relative to the pare
54 PAMU controller's configurat
55 be set to the size of this P
56 For PAMU v1.0, this size is
57 - fsl,primary-cache-geometry
58 : <prop-encoded-array>
59 Two cells that specify the g
60 cache. The first is the num
61 second is the number of "way
62 specify a value of 1.
63 - fsl,secondary-cache-geometry
64 : <prop-encoded-array>
65 Two cells that specify the g
66 cache. The first is the num
67 second is the number of "way
68 specify a value of 1.
69
70 Device nodes:
71
72 Devices that have LIODNs need to specify links
73 (the actual PAMU controller that this device i
74 the LIODN register, if applicable.
75
76 - fsl,iommu-parent
77 : <phandle>
78 Phandle to the single, specifi
79 this device is connect. The P
80 the device tree to assist code
81 best LIODN values to minimize
82
83 - fsl,liodn-reg : <prop-encoded-array>
84 Two cells that specify the l
85 for this device. Required f
86 LIODN. The first cell is a
87 the registers where the LIOD
88 the offset from the first "r
89 the specific LIODN register
90
91
92 Example:
93
94 iommu@20000 {
95 compatible = "fsl,pamu-v1.0",
96 reg = <0x20000 0x5000>;
97 ranges = <0 0x20000 0x5000>;
98 fsl,portid-mapping = <0xf80000
99 #address-cells = <1>;
100 #size-cells = <1>;
101 interrupts = <
102 24 2 0 0
103 16 2 1 30>;
104
105 pamu0: pamu@0 {
106 reg = <0 0x1000>;
107 fsl,primary-cache-geom
108 fsl,secondary-cache-ge
109 };
110
111 pamu1: pamu@1000 {
112 reg = <0x1000 0x1000>;
113 fsl,primary-cache-geom
114 fsl,secondary-cache-ge
115 };
116
117 pamu2: pamu@2000 {
118 reg = <0x2000 0x1000>;
119 fsl,primary-cache-geom
120 fsl,secondary-cache-ge
121 };
122
123 pamu3: pamu@3000 {
124 reg = <0x3000 0x1000>;
125 fsl,primary-cache-geom
126 fsl,secondary-cache-ge
127 };
128
129 pamu4: pamu@4000 {
130 reg = <0x4000 0x1000>;
131 fsl,primary-cache-geom
132 fsl,secondary-cache-ge
133 };
134 };
135
136 guts: global-utilities@e0000 {
137 compatible = "fsl,qoriq-device
138 reg = <0xe0000 0xe00>;
139 fsl,has-rstcr;
140 #sleep-cells = <1>;
141 fsl,liodn-bits = <12>;
142 };
143
144 /include/ "qoriq-dma-0.dtsi"
145 dma@100300 {
146 fsl,iommu-parent = <&pamu0>;
147 fsl,liodn-reg = <&guts 0x584>;
148 };
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.