xref: /linux/Documentation/devicetree/bindings/remoteproc/xlnx,zynqmp-r5fss.yaml (revision 8a922b7728a93d837954315c98b84f6b78de0c4f) 
1# SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/remoteproc/xlnx,zynqmp-r5fss.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Xilinx R5F processor subsystem
8
9maintainers:
10  - Ben Levinsky <ben.levinsky@amd.com>
11  - Tanmay Shah <tanmay.shah@amd.com>
12
13description: |
14  The Xilinx platforms include a pair of Cortex-R5F processors (RPU) for
15  real-time processing based on the Cortex-R5F processor core from ARM.
16  The Cortex-R5F processor implements the Arm v7-R architecture and includes a
17  floating-point unit that implements the Arm VFPv3 instruction set.
18
19properties:
20  compatible:
21    const: xlnx,zynqmp-r5fss
22
23  xlnx,cluster-mode:
24    $ref: /schemas/types.yaml#/definitions/uint32
25    enum: [0, 1, 2]
26    description: |
27      The RPU MPCore can operate in split mode (Dual-processor performance), Safety
28      lock-step mode(Both RPU cores execute the same code in lock-step,
29      clock-for-clock) or Single CPU mode (RPU core 0 is held in reset while
30      core 1 runs normally). The processor does not support dynamic configuration.
31      Switching between modes is only permitted immediately after a processor reset.
32      If set to  1 then lockstep mode and if 0 then split mode.
33      If set to  2 then single CPU mode. When not defined, default will be lockstep mode.
34      In summary,
35      0: split mode
36      1: lockstep mode (default)
37      2: single cpu mode
38
39patternProperties:
40  "^r5f-[a-f0-9]+$":
41    type: object
42    description: |
43      The RPU is located in the Low Power Domain of the Processor Subsystem.
44      Each processor includes separate L1 instruction and data caches and
45      tightly coupled memories (TCM). System memory is cacheable, but the TCM
46      memory space is non-cacheable.
47
48      Each RPU contains one 64KB memory and two 32KB memories that
49      are accessed via the TCM A and B port interfaces, for a total of 128KB
50      per processor. In lock-step mode, the processor has access to 256KB of
51      TCM memory.
52
53    properties:
54      compatible:
55        const: xlnx,zynqmp-r5f
56
57      power-domains:
58        maxItems: 1
59
60      mboxes:
61        minItems: 1
62        items:
63          - description: mailbox channel to send data to RPU
64          - description: mailbox channel to receive data from RPU
65
66      mbox-names:
67        minItems: 1
68        items:
69          - const: tx
70          - const: rx
71
72      sram:
73        $ref: /schemas/types.yaml#/definitions/phandle-array
74        minItems: 1
75        maxItems: 8
76        items:
77          maxItems: 1
78        description: |
79          phandles to one or more reserved on-chip SRAM regions. Other than TCM,
80          the RPU can execute instructions and access data from the OCM memory,
81          the main DDR memory, and other system memories.
82
83          The regions should be defined as child nodes of the respective SRAM
84          node, and should be defined as per the generic bindings in
85          Documentation/devicetree/bindings/sram/sram.yaml
86
87      memory-region:
88        description: |
89          List of phandles to the reserved memory regions associated with the
90          remoteproc device. This is variable and describes the memories shared with
91          the remote processor (e.g. remoteproc firmware and carveouts, rpmsg
92          vrings, ...). This reserved memory region will be allocated in DDR memory.
93        minItems: 1
94        maxItems: 8
95        items:
96          - description: region used for RPU firmware image section
97          - description: vdev buffer
98          - description: vring0
99          - description: vring1
100        additionalItems: true
101
102    required:
103      - compatible
104      - power-domains
105
106    unevaluatedProperties: false
107
108required:
109  - compatible
110
111additionalProperties: false
112
113examples:
114  - |
115    remoteproc {
116        compatible = "xlnx,zynqmp-r5fss";
117        xlnx,cluster-mode = <1>;
118
119        r5f-0 {
120            compatible = "xlnx,zynqmp-r5f";
121            power-domains = <&zynqmp_firmware 0x7>;
122            memory-region = <&rproc_0_fw_image>, <&rpu0vdev0buffer>, <&rpu0vdev0vring0>, <&rpu0vdev0vring1>;
123            mboxes = <&ipi_mailbox_rpu0 0>, <&ipi_mailbox_rpu0 1>;
124            mbox-names = "tx", "rx";
125        };
126
127        r5f-1 {
128            compatible = "xlnx,zynqmp-r5f";
129            power-domains = <&zynqmp_firmware 0x8>;
130            memory-region = <&rproc_1_fw_image>, <&rpu1vdev0buffer>, <&rpu1vdev0vring0>, <&rpu1vdev0vring1>;
131            mboxes = <&ipi_mailbox_rpu1 0>, <&ipi_mailbox_rpu1 1>;
132            mbox-names = "tx", "rx";
133        };
134    };
135...
136