xref: /freebsd/sys/contrib/device-tree/Bindings/mips/mti,mips-cm.yaml (revision 8ccc0d235c226d84112561d453c49904398d085c)

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/mips/mti,mips-cm.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: MIPS Coherence Manager

description:
  The Coherence Manager (CM) is responsible for establishing the
  global ordering of requests from all elements of the system and
  sending the correct data back to the requester. It supports Cache
  to Cache transfers.
  https://training.mips.com/cps_mips/PDF/CPS_Introduction.pdf
  https://training.mips.com/cps_mips/PDF/Coherency_Manager.pdf

maintainers:
  - Jiaxun Yang <jiaxun.yang@flygoat.com>

properties:
  compatible:
    oneOf:
      - const: mti,mips-cm
      - const: mobileye,eyeq6-cm
        description:
          On EyeQ6 the HCI (Hardware Cache Initialization) information for
          the L2 cache in multi-cluster configuration is broken.

  reg:
    description:
      Base address and size of the Global Configuration Registers
      referred to as CMGCR.They are the system programmer's interface
      to the Coherency Manager. Their location in the memory map is
      determined at core build time. In a functional system, the base
      address is provided by the Coprocessor 0, but some
      System-on-Chip (SoC) designs may not provide an accurate address
      that needs to be described statically.

    maxItems: 1

required:
  - compatible

additionalProperties: false

examples:
  - |
    coherency-manager@1fbf8000 {
      compatible = "mti,mips-cm";
      reg = <0x1bde8000 0x8000>;
    };

  - |
    coherency-manager {
      compatible = "mobileye,eyeq6-cm";
    };
...