aboutsummaryrefslogtreecommitdiff
path: root/Documentation/devicetree/bindings/powerpc/fsl/pamu.txt
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/devicetree/bindings/powerpc/fsl/pamu.txt')
-rw-r--r--Documentation/devicetree/bindings/powerpc/fsl/pamu.txt140
1 files changed, 140 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/powerpc/fsl/pamu.txt b/Documentation/devicetree/bindings/powerpc/fsl/pamu.txt
new file mode 100644
index 00000000..1f5e329f
--- /dev/null
+++ b/Documentation/devicetree/bindings/powerpc/fsl/pamu.txt
@@ -0,0 +1,140 @@
+Freescale Peripheral Management Access Unit (PAMU) Device Tree Binding
+
+DESCRIPTION
+
+The PAMU is an I/O MMU that provides device-to-memory access control and
+address translation capabilities.
+
+Required properties:
+
+- compatible : <string>
+ First entry is a version-specific string, such as
+ "fsl,pamu-v1.0". The second is "fsl,pamu".
+- ranges : <prop-encoded-array>
+ A standard property. Utilized to describe the memory mapped
+ I/O space utilized by the controller. The size should
+ be set to the total size of the register space of all
+ physically present PAMU controllers. For example, for
+ PAMU v1.0, on an SOC that has five PAMU devices, the size
+ is 0x5000.
+- interrupts : <prop-encoded-array>
+ Interrupt mappings. The first tuple is the normal PAMU
+ interrupt, used for reporting access violations. The second
+ is for PAMU hardware errors, such as PAMU operation errors
+ and ECC errors.
+- #address-cells: <u32>
+ A standard property.
+- #size-cells : <u32>
+ A standard property.
+
+Optional properties:
+- reg : <prop-encoded-array>
+ A standard property. It represents the CCSR registers of
+ all child PAMUs combined. Include it to provide support
+ for legacy drivers.
+- interrupt-parent : <phandle>
+ Phandle to interrupt controller
+
+Child nodes:
+
+Each child node represents one PAMU controller. Each SOC device that is
+connected to a specific PAMU device should have a "fsl,pamu-phandle" property
+that links to the corresponding specific child PAMU controller.
+
+- reg : <prop-encoded-array>
+ A standard property. Specifies the physical address and
+ length (relative to the parent 'ranges' property) of this
+ PAMU controller's configuration registers. The size should
+ be set to the size of this PAMU controllers's register space.
+ For PAMU v1.0, this size is 0x1000.
+- fsl,primary-cache-geometry
+ : <prop-encoded-array>
+ Two cells that specify the geometry of the primary PAMU
+ cache. The first is the number of cache lines, and the
+ second is the number of "ways". For direct-mapped caches,
+ specify a value of 1.
+- fsl,secondary-cache-geometry
+ : <prop-encoded-array>
+ Two cells that specify the geometry of the secondary PAMU
+ cache. The first is the number of cache lines, and the
+ second is the number of "ways". For direct-mapped caches,
+ specify a value of 1.
+
+Device nodes:
+
+Devices that have LIODNs need to specify links to the parent PAMU controller
+(the actual PAMU controller that this device is connected to) and a pointer to
+the LIODN register, if applicable.
+
+- fsl,iommu-parent
+ : <phandle>
+ Phandle to the single, specific PAMU controller node to which
+ this device is connect. The PAMU topology is represented in
+ the device tree to assist code that dynamically determines the
+ best LIODN values to minimize PAMU cache thrashing.
+
+- fsl,liodn-reg : <prop-encoded-array>
+ Two cells that specify the location of the LIODN register
+ for this device. Required for devices that have a single
+ LIODN. The first cell is a phandle to a node that contains
+ the registers where the LIODN is to be set. The second is
+ the offset from the first "reg" resource of the node where
+ the specific LIODN register is located.
+
+
+Example:
+
+ iommu@20000 {
+ compatible = "fsl,pamu-v1.0", "fsl,pamu";
+ reg = <0x20000 0x5000>;
+ ranges = <0 0x20000 0x5000>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+ interrupts = <
+ 24 2 0 0
+ 16 2 1 30>;
+
+ pamu0: pamu@0 {
+ reg = <0 0x1000>;
+ fsl,primary-cache-geometry = <32 1>;
+ fsl,secondary-cache-geometry = <128 2>;
+ };
+
+ pamu1: pamu@1000 {
+ reg = <0x1000 0x1000>;
+ fsl,primary-cache-geometry = <32 1>;
+ fsl,secondary-cache-geometry = <128 2>;
+ };
+
+ pamu2: pamu@2000 {
+ reg = <0x2000 0x1000>;
+ fsl,primary-cache-geometry = <32 1>;
+ fsl,secondary-cache-geometry = <128 2>;
+ };
+
+ pamu3: pamu@3000 {
+ reg = <0x3000 0x1000>;
+ fsl,primary-cache-geometry = <32 1>;
+ fsl,secondary-cache-geometry = <128 2>;
+ };
+
+ pamu4: pamu@4000 {
+ reg = <0x4000 0x1000>;
+ fsl,primary-cache-geometry = <32 1>;
+ fsl,secondary-cache-geometry = <128 2>;
+ };
+ };
+
+ guts: global-utilities@e0000 {
+ compatible = "fsl,qoriq-device-config-1.0";
+ reg = <0xe0000 0xe00>;
+ fsl,has-rstcr;
+ #sleep-cells = <1>;
+ fsl,liodn-bits = <12>;
+ };
+
+/include/ "qoriq-dma-0.dtsi"
+ dma@100300 {
+ fsl,iommu-parent = <&pamu0>;
+ fsl,liodn-reg = <&guts 0x584>; /* DMA2LIODNR */
+ };