TMS320F28379D: How to make dual CPU run from Flash

Dear TI experts,

I want to dual CPUs run from Flash after Power reset but I couldn't succeed it yet.

I'm working with Launchxl-F28379D.

I imported sample projects from <C2000Ware_Folder>/driverlib/f2837xd/example/dual/led

One is led_ex1_blinky_cpu1 and the other is led_ex1_blinky_cpu2.

As those configuration is for RAM, I changed Build configuration 'CPU1_FLASH_STANDALONE' for CPU1 and 'CPU2_FLASH' for CPU2.

Build was succeeded and I loaded .out into CPU1 core and CPU2 core respectively using CCS debug.

When I run, it didn't work properly.

I traced and found CPU1 is blocking in the below section in Device_bootCPU2

    //
    // Wait until CPU02 control system boot ROM is ready to receive
    // CPU01 to CPU02 INT1 interrupts.
    //
    do
    {
        bootStatus = HWREG(IPC_BASE + IPC_O_BOOTSTS) &
                     C2_BOOTROM_BOOTSTS_SYSTEM_READY;
    } while ((bootStatus != C2_BOOTROM_BOOTSTS_SYSTEM_READY));

So I commented below code,

#ifdef _STANDALONE
#ifdef _FLASH
    //
    // Send boot command to allow the CPU2 application to begin execution
    //
    Device_bootCPU2(C1C2_BROM_BOOTMODE_BOOT_FROM_FLASH);
#else
    //
    // Send boot command to allow the CPU2 application to begin execution
    //
    Device_bootCPU2(C1C2_BROM_BOOTMODE_BOOT_FROM_RAM);

#endif // _FLASH
#endif // _STANDALONE

Then, it works well.

But another problem happened.

After I pressed 'S3' Reset button, CPU1 is working well but CPU2 didn't run its code.

I think it's because CPU1 didn't make CPU2 boot using Device_bootCPU2.

I didn't make any change except changing Build Configuration ..._RAM to ..._FLASH or ..._FLASH_STANDALONE.

Is there anything left that I should do?

Looking forward to get any guide from TI Experts.

Thank you in advance.

James Kim