qcom,smem.txt

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    1 Qualcomm Shared Memory Manager binding
    2 
    3 This binding describes the Qualcomm Shared Memory Manager, used to share data
    4 between various subsystems and OSes in Qualcomm platforms.
    5 
    6 - compatible:
    7         Usage: required
    8         Value type: <stringlist>
    9         Definition: must be:
   10                     "qcom,smem"
   11 
   12 - memory-region:
   13         Usage: required
   14         Value type: <prop-encoded-array>
   15         Definition: handle to memory reservation for main SMEM memory region.
   16 
   17 - qcom,rpm-msg-ram:
   18         Usage: required
   19         Value type: <prop-encoded-array>
   20         Definition: handle to RPM message memory resource
   21 
   22 - hwlocks:
   23         Usage: required
   24         Value type: <prop-encoded-array>
   25         Definition: reference to a hwspinlock used to protect allocations from
   26                     the shared memory
   27 
   28 = EXAMPLE
   29 The following example shows the SMEM setup for MSM8974, with a main SMEM region
   30 at 0xfa00000 and the RPM message ram at 0xfc428000:
   31 
   32         reserved-memory {
   33                 #address-cells = <1>;
   34                 #size-cells = <1>;
   35                 ranges;
   36 
   37                 smem_region: smem@fa00000 {
   38                         reg = <0xfa00000 0x200000>;
   39                         no-map;
   40                 };
   41         };
   42 
   43         smem@fa00000 {
   44                 compatible = "qcom,smem";
   45 
   46                 memory-region = <&smem_region>;
   47                 qcom,rpm-msg-ram = <&rpm_msg_ram>;
   48 
   49                 hwlocks = <&tcsr_mutex 3>;
   50         };
   51 
   52         soc {
   53                 rpm_msg_ram: memory@fc428000 {
   54                         compatible = "qcom,rpm-msg-ram";
   55                         reg = <0xfc428000 0x4000>;
   56                 };
   57         };

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/soc/qcom/qcom,smem.txt

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sys/contrib/device-tree/Bindings/soc/qcom/qcom,smem.txt