AWR2944: Bootloader reserving 1M of memory in AWR294x MCU+ SDK 09.00.00 - why?

Recently upgraded to  AWR294x MCU+ SDK  09.00.00. In this new SDK the bootloader is reserving 1M of L3 memory. I'd like to know why, and what the implications are.

From AWR294x MCU+ SDK  09.00.00:

File: C:\ti\mmwave_mcuplus_sdk_04_04_01_02\mcu_plus_sdk_awr294x_09_00_00_15\source\drivers\bootloader\soc\awr294x\bootloader_soc.c

Bootloader_resMemSections gResMemSection =

{

    .numSections    = 2,

    .memSection[0].memStart   = 0x10200000,

    .memSection[0].memEnd     = 0x10220000,

    .memSection[1].memStart   = 0x88100000,

    .memSection[1].memEnd     = 0x88200000

};

File: C:\ti\mmwave_mcuplus_sdk_04_04_01_02\mcu_plus_sdk_awr294x_09_00_00_15\source\drivers\bootloader\bootloader.c

            resMem = Bootloader_socGetSBLMem();

            for (resSectionCnt = 0; resSectionCnt < resMem->numSections; resSectionCnt++)

            {

                start = resMem->memSection[resSectionCnt].memStart;

                end = resMem->memSection[resSectionCnt].memEnd;

                if((section.addr > start) && (section.addr < end))

                {

                    status = SystemP_FAILURE;

                    DebugP_logError("Application image has a load address (0x%08X) in the SBL reserved memory range!!\r\n", section.addr);

                    break;

                }

            }