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Diffstat (limited to 'docs/components/fconf/fconf_properties.rst')
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diff --git a/docs/components/fconf/fconf_properties.rst b/docs/components/fconf/fconf_properties.rst new file mode 100644 index 0000000..3479576 --- /dev/null +++ b/docs/components/fconf/fconf_properties.rst @@ -0,0 +1,42 @@ +DTB binding for FCONF properties +================================ + +This document describes the device tree format of |FCONF| properties. These +properties are not related to a specific platform and can be queried from +common code. + +Dynamic configuration +~~~~~~~~~~~~~~~~~~~~~ + +The |FCONF| framework expects a *dtb-registry* node with the following field: + +- compatible [mandatory] + - value type: <string> + - Must be the string "fconf,dyn_cfg-dtb_registry". + +Then a list of subnodes representing a configuration |DTB|, which can be used +by |FCONF|. Each subnode should be named according to the information it +contains, and must be formed with the following fields: + +- load-address [mandatory] + - value type: <u64> + - Physical loading base address of the configuration. + If secondary-load-address is also provided (see below), then this is the + primary load address. + +- max-size [mandatory] + - value type: <u32> + - Maximum size of the configuration. + +- id [mandatory] + - value type: <u32> + - Image ID of the configuration. + +- secondary-load-address [optional] + - value type: <u64> + - A platform uses this physical address to copy the configuration to + another location during the boot-flow. + +-------------- + +*Copyright (c) 2023, Arm Limited and Contributors. All rights reserved.* |