102 lines
3.5 KiB
Plaintext
102 lines
3.5 KiB
Plaintext
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TI K3 DSP devices
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=================
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The TI K3 family of SoCs usually have one or more TI DSP Core sub-systems that
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are used to offload some of the processor-intensive tasks or algorithms, for
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achieving various system level goals.
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These processor sub-systems usually contain additional sub-modules like L1
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and/or L2 caches/SRAMs, an Interrupt Controller, an external memory controller,
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a dedicated local power/sleep controller etc. The DSP processor cores in the
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K3 SoCs is usually either a TMS320C66x CorePac processor or a TMS320C71x CorePac
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processor.
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DSP Device Node:
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================
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Each DSP Core sub-system is represented as a single DT node. Each node has a
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number of required or optional properties that enable the OS running on the
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host processor (Arm CorePac) to perform the device management of the remote
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processor and to communicate with the remote processor.
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Required properties:
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--------------------
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The following are the mandatory properties:
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- compatible: Should be one of the following,
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"ti,j721e-c66-dsp" for C66x DSPs on K3 J721E SoCs
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"ti,j721e-c71-dsp" for C71x DSPs on K3 J721E SoCs
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- reg: Should contain an entry for each value in 'reg-names'.
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Each entry should have the memory region's start address
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and the size of the region, the representation matching
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the parent node's '#address-cells' and '#size-cells' values.
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- reg-names: Should contain strings with the following names, each
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representing a specific internal memory region (if
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present), and should be defined in this order,
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"l2sram", "l1pram", "l1dram"
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NOTE: C71x DSPs do not have a "l1pram" memory.
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- ti,sci: Should be a phandle to the TI-SCI System Controller node
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- ti,sci-dev-id: Should contain the TI-SCI device id corresponding to the
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DSP Core. Please refer to the corresponding System
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Controller documentation for valid values for the DSP
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cores.
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- ti,sci-proc-ids: Should contain 2 integer values. The first cell should
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contain the TI-SCI processor id for the DSP core device
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and the second cell should contain the TI-SCI host id to
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which the processor control ownership should be
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transferred to.
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- resets: Should contain the phandle to the reset controller node
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managing the resets for this device, and a reset
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specifier. Please refer to the following reset bindings
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for the reset argument specifier,
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Documentation/devicetree/bindings/reset/ti,sci-reset.txt
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Example:
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---------
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1. J721E SoC
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/* J721E remoteproc alias */
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aliases {
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rproc6 = &c66_0;
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rproc8 = &c71_0;
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};
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cbass_main: interconnect@100000 {
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compatible = "simple-bus";
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#address-cells = <2>;
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#size-cells = <2>;
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ranges = <0x00 0x64800000 0x00 0x64800000 0x00 0x00800000>, /* C71_0 */
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<0x4d 0x80800000 0x4d 0x80800000 0x00 0x00800000>, /* C66_0 */
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<0x4d 0x81800000 0x4d 0x81800000 0x00 0x00800000>; /* C66_1 */
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/* J721E C66_0 DSP node */
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c66_0: dsp@4d80800000 {
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compatible = "ti,j721e-c66-dsp";
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reg = <0x4d 0x80800000 0x00 0x00048000>,
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<0x4d 0x80e00000 0x00 0x00008000>,
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<0x4d 0x80f00000 0x00 0x00008000>;
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reg-names = "l2sram", "l1pram", "l1dram";
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ti,sci = <&dmsc>;
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ti,sci-dev-id = <142>;
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ti,sci-proc-ids = <0x03 0xFF>;
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resets = <&k3_reset 142 1>;
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};
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/* J721E C71_0 DSP node */
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c71_0: dsp@64800000 {
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compatible = "ti,j721e-c71-dsp";
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reg = <0x00 0x64800000 0x00 0x00080000>,
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<0x00 0x64e00000 0x00 0x0000c000>;
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reg-names = "l2sram", "l1dram";
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ti,sci = <&dmsc>;
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ti,sci-dev-id = <15>;
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ti,sci-proc-ids = <0x30 0xFF>;
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resets = <&k3_reset 15 1>;
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};
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};
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