nordic,owned-memory
Vendor: Nordic Semiconductor
Description
Nordic Owned Memory
Memory region with permission attributes. Each enabled region of this kind
will be recorded in the UICR of the compiled domain. Memory ownership and
access is then configured for the domain at boot time, based on the UICR.
Example:
reserved-memory {
memory@2fc00000 {
compatible = "nordic,owned-memory";
reg = <0x2fc00000 0x1000>;
status = "okay";
nordic,access = <NRF_OWNER_ID_APPLICATION NRF_PERM_R>,
<NRF_OWNER_ID_RADIOCORE NRF_PERM_W>;
};
};
A single local domain can request a memory region to be reserved on behalf of
multiple access owners. A single memory region shall be reserved by at most
one domain, by setting status "okay" on the associated node. For example, if
the region defined above is enabled by Application on behalf of Radiocore,
then the Radiocore's devicetree must set status "disabled" on that node.
Each of the different owners may have a different set of permissions granted,
as also shown above.
Note: one domain can also reserve memory for another domain and not itself.
Whichever domain has status "okay" set on the node does not need to be listed
as one of the access owners.
Properties
Node specific properties
Properties not inherited from the base binding file.
Name |
Type |
Details |
|---|---|---|
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Array of (owner-id, permission-flags) pairs, where:
- Owner ID represents the domain that will have access to this memory.
Valid values can be found in dts/common/nordic/<soc>.dtsi,
where they are defined as NRF_OWNER_ID_*
- Permissions are encoded as a 32-bit bitfield, using the flags found in
include/zephyr/dt-bindings/reserved-memory/nordic-owned-memory.h,
where they are defined as NRF_PERM_*
The same file defines all possible permission flag combinations.
For example, one can use:
<NRF_OWNER_ID_APPLICATION NRF_PERM_RWX>
as a shorthand for:
<NRF_OWNER_ID_APPLICATION (NRF_PERM_R | NRF_PERM_W | NRF_PERM_X)>
|
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|
Signify that this node should result in a dedicated linker script
memory region in the final executable. The region address and size
is taken from the <reg> property, while the name is the value of
this property.
|
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|
Attribute or set of attributes (bitmask) for the memory region. See
'include/zephyr/dt-bindings/memory-attr/memory-attr.h' for a
comprehensive list with description of possible values.
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Deprecated node specific properties
Deprecated properties not inherited from the base binding file.
Name |
Type |
Details |
|---|---|---|
|
|
Deprecated, applies only if 'nordic,access' is not defined.
Owner ID of the domain that will own this memory region. If not defined,
the ownership will default to the domain being compiled.
Note: owner ID is not the same as domain ID; see the product specification
for details.
|
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Deprecated, applies only if 'nordic,access' is not defined.
Owner has read access to the region.
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Deprecated, applies only if 'nordic,access' is not defined.
Owner has write access to the region.
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Deprecated, applies only if 'nordic,access' is not defined.
Owner can execute code from the region.
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Deprecated, applies only if 'nordic,access' is not defined.
Owner has secure-only access to the region.
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Deprecated, applies only if 'nordic,access' is not defined.
Memory region is used for non-secure-callable code.
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Signify that this node should result in a dedicated MPU region.
Deprecated in favor of 'zephyr,memory-attr'.
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Base properties
Properties inherited from the base binding file, which defines common properties that may be set on many nodes. Not all of these may apply to the “nordic,owned-memory” compatible.
Name |
Type |
Details |
|---|---|---|
|
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register space
This property is required. See Important properties for more information. |
|
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indicates the operational status of a device
Legal values: See Important properties for more information. |
|
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compatible strings
This property is required. See Important properties for more information. |
|
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name of each register space
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interrupts for device
See Important properties for more information. |
|
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extended interrupt specifier for device
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name of each interrupt
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phandle to interrupt controller node
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Human readable string describing the device (used as device_get_binding() argument)
See Important properties for more information. This property is deprecated. |
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Clock gate information
|
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name of each clock
|
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number of address cells in reg property
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number of size cells in reg property
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DMA channels specifiers
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Provided names of DMA channel specifiers
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IO channels specifiers
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Provided names of IO channel specifiers
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mailbox / IPM channels specifiers
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Provided names of mailbox / IPM channel specifiers
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Power domain specifiers
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Provided names of power domain specifiers
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Number of cells in power-domains property
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Do not initialize device automatically on boot. Device should be manually
initialized using device_init().
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Property to identify that a device can be used as wake up source.
When this property is provided a specific flag is set into the
device that tells the system that the device is capable of
wake up the system.
Wake up capable devices are disabled (interruptions will not wake up
the system) by default but they can be enabled at runtime if necessary.
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Automatically configure the device for runtime power management after the
init function runs.
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List of power states that will disable this device power.
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