MB2 BCT Misc Configuration¶

This section provides additional information about the MB2 BCT Misc configuration file.

MB2 Feature Fields¶

Here is a list of the Boolean flags that enable or disable functionality in MB2:

Field	Description
`disable-cpu-l2ecc`	If this property is present, CPU L2 ECC is disabled. Otherwise, it is enabled.
`enable-combined-uart`	If this property is present, the combined uart is enabled. Otherwise, it is disabled.
`spe-uart-instance`	UART controller that is used for the combined UART by the SPE.

MB2 Firmware Data¶

The MB2 firmware configuration is applied in the following way:

/ {
   mb2-misc {
       <firmware-type> {
          <parameter> = <value>;
       };
   };
};

Where firmware-type is one of the following types:

cpubl
ape-fw
bpmp-fw
rce-fw
sce-fw
camera-task-fw
apr-fw

<parameter> is one of the parameters from the following table:

Parameters	Description
`enable`	If this parameter is present, the loading of firmware from MB2 is enabled. Otherwise, the firmware loading is disabled.
`ast-va`	Virtual address for the firmware carveout in the BPMP-R5 address space.
`load-offset`	Offset in firmware carveout where firmware binary is loaded.
`entry-offset`	Offset of the firmware entry point in the firmware carveout.

Here is an example of the MB2 Misc DTS configuration file:

/dts-v1/;

/ {
   mb2-misc {
      disable-cpu-l2ecc;
      enable-combined-uart;
      spe-uart-instance = <0x2>;

      firmware {
         sce {
             ast-va = <0x70000000>;
         };
         ape {
             enable;
             ast-va = <0x80000000>;
         };
         rce {
             enable;
             ast-va = <0x70000000>;
         };
         cpubl {
             load-offset = <0x600000>;
         };
         apr {
             ast-va = <0xC0000000>;
         };
         camera-task {
             ast-va = <0x78000000>;
         };
              };
       };
};

Here is the previous CFG file format:

gpio-intmap.port.B.pin.1 = 0; // GPIO B1 to INT0
gpio-intmap.port.AA.pin.0 = 0; // GPIO AA0 to INT0
gpio-intmap.port.AA.pin.1 = 0; // GPIO AA1 to INT0
gpio-intmap.port.AA.pin.2 = 0; // GPIO AA2 to INT0