52 lines
1.3 KiB
Plaintext
Executable file
52 lines
1.3 KiB
Plaintext
Executable file
Qualcomm Remote File System Memory binding
|
|
|
|
This binding describes the Qualcomm remote filesystem memory, which serves the
|
|
purpose of describing the shared memory region used for remote processors to
|
|
access block device data using the Remote Filesystem protocol.
|
|
|
|
- compatible:
|
|
Usage: required
|
|
Value type: <stringlist>
|
|
Definition: must be:
|
|
"qcom,rmtfs-mem"
|
|
|
|
- reg:
|
|
Usage: required for static allocation
|
|
Value type: <prop-encoded-array>
|
|
Definition: must specify base address and size of the memory region,
|
|
as described in reserved-memory.txt
|
|
|
|
- size:
|
|
Usage: required for dynamic allocation
|
|
Value type: <prop-encoded-array>
|
|
Definition: must specify a size of the memory region, as described in
|
|
reserved-memory.txt
|
|
|
|
- qcom,client-id:
|
|
Usage: required
|
|
Value type: <u32>
|
|
Definition: identifier of the client to use this region for buffers.
|
|
|
|
- qcom,vmid:
|
|
Usage: optional
|
|
Value type: <u32>
|
|
Definition: vmid of the remote processor, to set up memory protection.
|
|
|
|
= EXAMPLE
|
|
The following example shows the remote filesystem memory setup for APQ8016,
|
|
with the rmtfs region for the Hexagon DSP (id #1) located at 0x86700000.
|
|
|
|
reserved-memory {
|
|
#address-cells = <2>;
|
|
#size-cells = <2>;
|
|
ranges;
|
|
|
|
rmtfs@86700000 {
|
|
compatible = "qcom,rmtfs-mem";
|
|
reg = <0x0 0x86700000 0x0 0xe0000>;
|
|
no-map;
|
|
|
|
qcom,client-id = <1>;
|
|
};
|
|
};
|