TMS320F28P550SJ: M0/M1 initialization fails after POR

//#############################################################################
//
// FILE:   main.c
//
// TITLE:  Universal LED Project
//
// Universal LED Project Example
//
// This example demonstrates how to blink an LED using the **Universal Project**.
// In order to migrate the project within syscfg, click the swtich button under 
// the device view and select your corresponding device to migrate, saving the
// project will auto-migrate your project settings.
//!
//!  \note This example project has support for migration across our C2000 
//!  device families. If you are wanting to build this project from launchpad
//!  or controlCARD, please specify in the .syscfg file the board you're using.
//!  At any time you can select another device to migrate this example.
//
//#############################################################################
//
//
// 
// C2000Ware v5.04.00.00
//
// Copyright (C) 2024 Texas Instruments Incorporated - http://www.ti.com
//
// Redistribution and use in source and binary forms, with or without 
// modification, are permitted provided that the following conditions 
// are met:
// 
//   Redistributions of source code must retain the above copyright 
//   notice, this list of conditions and the following disclaimer.
// 
//   Redistributions in binary form must reproduce the above copyright
//   notice, this list of conditions and the following disclaimer in the 
//   documentation and/or other materials provided with the   
//   distribution.
// 
//   Neither the name of Texas Instruments Incorporated nor the names of
//   its contributors may be used to endorse or promote products derived
//   from this software without specific prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// $
//#############################################################################

//
// Included Files
//
#include "driverlib.h"
#include "device.h"
#include "board.h"
#include "c2000ware_libraries.h"

// By default RAM is only initialized to zero by power-on reset, but not by warm reset
// _system_pre_init() is to initialize RAM to zero on all reset including warm reset. TI RTS library will call _system_pre_init() before main().
int _system_pre_init(void)
{
    EALLOW;

    *(volatile int *)(MEMCFG_BASE + MEMCFG_O_DXINIT)  = 0x0003;               // RAM INIT FOR M0/M1 Memory
    while(!(*(volatile int *) (MEMCFG_BASE + MEMCFG_O_DXINITDONE) == 0x3));   // Wait for InitDone Status

    EDIS;

    return 1;
}

// Main
//
void main(void)
{

    //
    // Initialize device clock and peripherals
    //
    Device_init();

    //
    // Disable pin locks and enable internal pull-ups.
    //
    Device_initGPIO();

    //
    // Initialize PIE and clear PIE registers. Disables CPU interrupts.
    //
    Interrupt_initModule();

    //
    // Initialize the PIE vector table with pointers to the shell Interrupt
    // Service Routines (ISR).
    //
    Interrupt_initVectorTable();

    //
    // PinMux and Peripheral Initialization
    //
    Board_init();

    //
    // C2000Ware Library initialization
    //
    C2000Ware_libraries_init();

    //
    // Enable Global Interrupt (INTM) and real time interrupt (DBGM)
    //
    EINT;
    ERTM;

    //
    // Loop Forever
    //
    for(;;)
    {
        //
        // Turn on LED
        //
        GPIO_writePin(myBoardLED0_GPIO, 0);

        //
        // Delay for a bit.
        //
        DEVICE_DELAY_US(500000);

        //
        // Turn off LED
        //
        GPIO_writePin(myBoardLED0_GPIO, 1);

        //
        // Delay for a bit.
        //
        DEVICE_DELAY_US(500000);
    }
}

//
// End of File
//