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