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Qualcomm IMEM
IMEM is fast on-chip memory used for various debug features and dma transactions.
Required properties
-compatible: "qcom,msm-imem"
-reg: start address and size of imem memory
If any children nodes exist the following properties are required:
-#address-cells: should be 1
-#size-cells: should be 1
-ranges: A triplet that includes the child address, parent address, &
length. The child address is assumed to be 0.
Child nodes:
------------
Peripheral Image Loader (pil):
------------------------------
Required properties:
-compatible: "qcom,msm-imem-pil"
-reg: start address and size of PIL region in imem
Bootloader Stats:
-----------------
Required properties:
-compatible: "qcom,msm-imem-boot_stats"
-reg: start address and size of boot_stats region in imem
Cache error reporting:
-----------------
Required properties:
-compatible: "qcom,msm-imem-cache_erp"
-reg: start address and size of cache_erp region in imem
Memory Dump:
------------
Required properties:
-compatible: "qcom,msm-imem-mem_dump_table"
-reg: start address and size of mem_dump_table region in imem
Restart Reason:
---------------
Required properties:
-compatible: "qcom,msm-imem-restart_reason
-reg: start address and size of restart_reason region in imem
Download Mode Type:
-------------------
Required properties:
-compatible: "qcom,msm-imem-dload-type"
-reg: start address and size of dload type region in imem
Download Mode:
--------------
Required properties:
-compatible: "qcom,msm-imem-download_mode"
-reg: start address and size of download_mode region in imem
Emergency Download Mode:
------------------------
-compatible: "qcom,msm-imem-emergency_download_mode"
-reg: start address and size of emergency_download_mode region in imem
Kaslr Offset:
------------------------
-compatible: "qcom,msm-imem-kaslr_offset"
-reg: start address and size of kaslr_offset region in imem
USB Diag Cookies:
-----------------
Memory region used to store USB PID and serial numbers to be used by
bootloader in download mode.
SSR Minidump Offset
-------------------
-Compatible: "qcom,msm-imem-minidump"
-reg: start address and size of ssr imem region
Required properties:
-compatible: "qcom,msm-imem-diag-dload"
-reg: start address and size of USB Diag download mode region in imem
Example:
qcom,msm-imem {
compatible = "qcom,msm-imem";
reg = <0xdeadbeef 0x1000>; /* < start_address size > */
ranges = <0x0 0xdeadbeef 0x1000>;
#address-cells = <1>;
#size-cells = <1>;
download_mode@0 {
compatible = "qcom,msm-imem-download_mode";
reg = <0x0 8>;
};
restart_reason@65c {
compatible = "qcom,msm-imem-restart_reason";
reg = <0x65c 4>;
};
imem_cache_erp: cache_erp@6a4 {
compatible = "qcom,msm-imem-cache_erp";
reg = <0x6a4 4>;
};
boot_stats@6b0 {
compatible = "qcom,msm-imem-boot_stats";
reg = <0x6b0 32>;
};
kaslr_offset@6d0 {
compatible = "qcom,msm-imem-kaslr_offset";
reg = <0x6d0 12>;
};
pil@94c {
compatible = "qcom,msm-imem-pil";
reg = <0x94c 200>;
};
emergency_download_mode@fe0 {
compatible = "qcom,msm-imem-emergency_download_mode";
reg = <0xfe0 12>;
};
ss_mdump@b88 {
compatible = "qcom,msm-imem-minidump";
reg = <0xb88 28>;
};
};
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