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SEC 6 is as Freescale's Cryptographic Accelerator and Assurance Module (CAAM).
Currently Freescale powerpc chip C29X is embedded with SEC 6.
SEC 6 device tree binding include:
-SEC 6 Node
-Job Ring Node
-Full Example
=====================================================================
SEC 6 Node
Description
Node defines the base address of the SEC 6 block.
This block specifies the address range of all global
configuration registers for the SEC 6 block.
For example, In C293, we could see three SEC 6 node.
PROPERTIES
- compatible
Usage: required
Value type: <string>
Definition: Must include "fsl,sec-v6.0".
- fsl,sec-era
Usage: optional
Value type: <u32>
Definition: A standard property. Define the 'ERA' of the SEC
device.
- #address-cells
Usage: required
Value type: <u32>
Definition: A standard property. Defines the number of cells
for representing physical addresses in child nodes.
- #size-cells
Usage: required
Value type: <u32>
Definition: A standard property. Defines the number of cells
for representing the size of physical addresses in
child nodes.
- reg
Usage: required
Value type: <prop-encoded-array>
Definition: A standard property. Specifies the physical
address and length of the SEC 6 configuration registers.
- ranges
Usage: required
Value type: <prop-encoded-array>
Definition: A standard property. Specifies the physical address
range of the SEC 6.0 register space (-SNVS not included). A
triplet that includes the child address, parent address, &
length.
Note: All other standard properties (see the ePAPR) are allowed
but are optional.
EXAMPLE
crypto@a0000 {
compatible = "fsl,sec-v6.0";
fsl,sec-era = <6>;
#address-cells = <1>;
#size-cells = <1>;
reg = <0xa0000 0x20000>;
ranges = <0 0xa0000 0x20000>;
};
=====================================================================
Job Ring (JR) Node
Child of the crypto node defines data processing interface to SEC 6
across the peripheral bus for purposes of processing
cryptographic descriptors. The specified address
range can be made visible to one (or more) cores.
The interrupt defined for this node is controlled within
the address range of this node.
- compatible
Usage: required
Value type: <string>
Definition: Must include "fsl,sec-v6.0-job-ring".
- reg
Usage: required
Value type: <prop-encoded-array>
Definition: Specifies a two JR parameters: an offset from
the parent physical address and the length the JR registers.
- interrupts
Usage: required
Value type: <prop_encoded-array>
Definition: Specifies the interrupts generated by this
device. The value of the interrupts property
consists of one interrupt specifier. The format
of the specifier is defined by the binding document
describing the node's interrupt parent.
EXAMPLE
jr@1000 {
compatible = "fsl,sec-v6.0-job-ring";
reg = <0x1000 0x1000>;
interrupts = <49 2 0 0>;
};
===================================================================
Full Example
Since some chips may contain more than one SEC, the dtsi contains
only the node contents, not the node itself. A chip using the SEC
should include the dtsi inside each SEC node. Example:
In qoriq-sec6.0.dtsi:
compatible = "fsl,sec-v6.0";
fsl,sec-era = <6>;
#address-cells = <1>;
#size-cells = <1>;
jr@1000 {
compatible = "fsl,sec-v6.0-job-ring",
"fsl,sec-v5.2-job-ring",
"fsl,sec-v5.0-job-ring",
"fsl,sec-v4.4-job-ring",
"fsl,sec-v4.0-job-ring";
reg = <0x1000 0x1000>;
};
jr@2000 {
compatible = "fsl,sec-v6.0-job-ring",
"fsl,sec-v5.2-job-ring",
"fsl,sec-v5.0-job-ring",
"fsl,sec-v4.4-job-ring",
"fsl,sec-v4.0-job-ring";
reg = <0x2000 0x1000>;
};
In the C293 device tree, we add the include of public property:
crypto@a0000 {
/include/ "qoriq-sec6.0.dtsi"
}
crypto@a0000 {
reg = <0xa0000 0x20000>;
ranges = <0 0xa0000 0x20000>;
jr@1000 {
interrupts = <49 2 0 0>;
};
jr@2000 {
interrupts = <50 2 0 0>;
};
};
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