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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/pmem-region.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
maintainers:
- Oliver O'Halloran <oohall@gmail.com>
title: Persistent Memory Regions
description: |
Persistent memory refers to a class of memory devices that are:
a) Usable as main system memory (i.e. cacheable), and
b) Retain their contents across power failure.
Given b) it is best to think of persistent memory as a kind of memory mapped
storage device. To ensure data integrity the operating system needs to manage
persistent regions separately to the normal memory pool. To aid with that this
binding provides a standardised interface for discovering where persistent
memory regions exist inside the physical address space.
properties:
compatible:
const: pmem-region
reg:
maxItems: 1
volatile:
description:
Indicates the region is volatile (non-persistent) and the OS can skip
cache flushes for writes
type: boolean
required:
- compatible
- reg
additionalProperties: false
examples:
- |
pmem@5000 {
compatible = "pmem-region";
reg = <0x00005000 0x00001000>;
};
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