1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/reserved-memory/nvidia,tegra264-bpmp-shmem.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Tegra CPU-NS - BPMP IPC reserved memory
8
9 maintainers:
10 - Peter De Schrijver <pdeschrijver@nvidia.com>
11
12 description: |
13 Define a memory region used for communication between CPU-NS and BPMP.
14 Typically this node is created by the bootloader as the physical address
15 has to be known to both CPU-NS and BPMP for correct IPC operation.
16 The memory region is defined using a child node under /reserved-memory.
17 The sub-node is named shmem@<address>.
18
19 allOf:
20 - $ref: reserved-memory.yaml
21
22 properties:
23 compatible:
24 const: nvidia,tegra264-bpmp-shmem
25
26 reg:
27 description: The physical address and size of the shared SDRAM region
28
29 unevaluatedProperties: false
30
31 required:
32 - compatible
33 - reg
34 - no-map
35
36 examples:
37 - |
38 reserved-memory {
39 #address-cells = <2>;
40 #size-cells = <2>;
41 dram_cpu_bpmp_mail: shmem@f1be0000 {
42 compatible = "nvidia,tegra264-bpmp-shmem";
43 reg = <0x0 0xf1be0000 0x0 0x2000>;
44 no-map;
45 };
46 };
47 ...
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