xref: /freebsd/sys/contrib/device-tree/Bindings/riscv/sifive-l2-cache.yaml (revision 3a3af6b2a160bea72509a9d5ef84e25906b0478a) 
1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2# Copyright (C) 2020 SiFive, Inc.
3%YAML 1.2
4---
5$id: http://devicetree.org/schemas/riscv/sifive-l2-cache.yaml#
6$schema: http://devicetree.org/meta-schemas/core.yaml#
7
8title: SiFive L2 Cache Controller
9
10maintainers:
11  - Sagar Kadam <sagar.kadam@sifive.com>
12  - Paul Walmsley  <paul.walmsley@sifive.com>
13
14description:
15  The SiFive Level 2 Cache Controller is used to provide access to fast copies
16  of memory for masters in a Core Complex. The Level 2 Cache Controller also
17  acts as directory-based coherency manager.
18  All the properties in ePAPR/DeviceTree specification applies for this platform.
19
20allOf:
21  - $ref: /schemas/cache-controller.yaml#
22
23select:
24  properties:
25    compatible:
26      contains:
27        enum:
28          - sifive,fu540-c000-ccache
29          - sifive,fu740-c000-ccache
30
31  required:
32    - compatible
33
34properties:
35  compatible:
36    items:
37      - enum:
38          - sifive,fu540-c000-ccache
39          - sifive,fu740-c000-ccache
40      - const: cache
41
42  cache-block-size:
43    const: 64
44
45  cache-level:
46    const: 2
47
48  cache-sets:
49    const: 1024
50
51  cache-size:
52    const: 2097152
53
54  cache-unified: true
55
56  interrupts:
57    minItems: 3
58    items:
59      - description: DirError interrupt
60      - description: DataError interrupt
61      - description: DataFail interrupt
62      - description: DirFail interrupt
63
64  reg:
65    maxItems: 1
66
67  next-level-cache: true
68
69  memory-region:
70    maxItems: 1
71    description: |
72      The reference to the reserved-memory for the L2 Loosely Integrated Memory region.
73      The reserved memory node should be defined as per the bindings in reserved-memory.txt.
74
75if:
76  properties:
77    compatible:
78      contains:
79        const: sifive,fu540-c000-ccache
80
81then:
82  properties:
83    interrupts:
84      description: |
85        Must contain entries for DirError, DataError and DataFail signals.
86      maxItems: 3
87
88else:
89  properties:
90    interrupts:
91      description: |
92        Must contain entries for DirError, DataError, DataFail, DirFail signals.
93      minItems: 4
94
95additionalProperties: false
96
97required:
98  - compatible
99  - cache-block-size
100  - cache-level
101  - cache-sets
102  - cache-size
103  - cache-unified
104  - interrupts
105  - reg
106
107examples:
108  - |
109    cache-controller@2010000 {
110        compatible = "sifive,fu540-c000-ccache", "cache";
111        cache-block-size = <64>;
112        cache-level = <2>;
113        cache-sets = <1024>;
114        cache-size = <2097152>;
115        cache-unified;
116        reg = <0x2010000 0x1000>;
117        interrupt-parent = <&plic0>;
118        interrupts = <1>,
119                     <2>,
120                     <3>;
121        next-level-cache = <&L25>;
122        memory-region = <&l2_lim>;
123    };
124