58 lines
1.2 KiB
Plaintext
58 lines
1.2 KiB
Plaintext
Qualcomm Shared Memory Manager binding
|
|
|
|
This binding describes the Qualcomm Shared Memory Manager, used to share data
|
|
between various subsystems and OSes in Qualcomm platforms.
|
|
|
|
- compatible:
|
|
Usage: required
|
|
Value type: <stringlist>
|
|
Definition: must be:
|
|
"qcom,smem"
|
|
|
|
- memory-region:
|
|
Usage: required
|
|
Value type: <prop-encoded-array>
|
|
Definition: handle to memory reservation for main SMEM memory region.
|
|
|
|
- qcom,rpm-msg-ram:
|
|
Usage: required
|
|
Value type: <prop-encoded-array>
|
|
Definition: handle to RPM message memory resource
|
|
|
|
- hwlocks:
|
|
Usage: required
|
|
Value type: <prop-encoded-array>
|
|
Definition: reference to a hwspinlock used to protect allocations from
|
|
the shared memory
|
|
|
|
= EXAMPLE
|
|
The following example shows the SMEM setup for MSM8974, with a main SMEM region
|
|
at 0xfa00000 and the RPM message ram at 0xfc428000:
|
|
|
|
reserved-memory {
|
|
#address-cells = <1>;
|
|
#size-cells = <1>;
|
|
ranges;
|
|
|
|
smem_region: smem@fa00000 {
|
|
reg = <0xfa00000 0x200000>;
|
|
no-map;
|
|
};
|
|
};
|
|
|
|
smem@fa00000 {
|
|
compatible = "qcom,smem";
|
|
|
|
memory-region = <&smem_region>;
|
|
qcom,rpm-msg-ram = <&rpm_msg_ram>;
|
|
|
|
hwlocks = <&tcsr_mutex 3>;
|
|
};
|
|
|
|
soc {
|
|
rpm_msg_ram: memory@fc428000 {
|
|
compatible = "qcom,rpm-msg-ram";
|
|
reg = <0xfc428000 0x4000>;
|
|
};
|
|
};
|