F28M35 Flash M3: Init

int main(void) {
    Uint16 i;
    Uint32 j;

    // Disable Interrupts
    IntMasterDisable();

    // Sets up PLL, M3 running at 75MHz and C28 running at 150MHz
    // SysCtlClockSet(0x8007 000F)
    // 20MHZ x 15 = 300MHZ/2 (PLL has a defualt built in divide by 2)
    // sysctl_div_1 = 1 => output from PLL = 150MHZ
    // M3 divider = 2 => clkc to M3 = 75 MHZ
    // XCLKOUT divider = 4 => XCLKOUT = 37.5 MHZ
    // C28 divder = 1 = > clck to C28 = 150 MHZ
    HWREG(SYSCTL_MWRALLOW) =  0xA5A5A5A5;
    SysCtlClockConfigSet(SYSCTL_USE_PLL | (SYSCTL_SPLLIMULT_M & 0xF) |\
                         SYSCTL_SYSDIV_1 | SYSCTL_M3SSDIV_2 |\
                         SYSCTL_XCLKDIV_4);

    // Copy stuff from flash to RAM
    memcpy(&RamfuncsRunStart, &RamfuncsLoadStart, (size_t)&RamfuncsLoadSize);

    // Init M3 flash and leave flash pump
    FlashInit();
    FlashLeavePump();

    // M3 EALLOW
    HWREG(SYSCTL_MWRALLOW) =  0xA5A5A5A5;
    SysCtlPeripheralDisable(SYSCTL_PERIPH_WDOG1);
    SysCtlPeripheralDisable(SYSCTL_PERIPH_WDOG0);

    // Give Shared RAM block 1 to C28 (C28 will put its programming status in this block)
    RAMMReqSharedMemAccess(S1_ACCESS,1);

    // Now clocking and memory are set up, so we can start C28
    IPCMtoCBootControlSystem(CBROM_MTOC_BOOTMODE_BOOT_FROM_FLASH);

    // Wait a little for C28 to boot up (not necessary, i think, but let it be)
    j = 100000;
    while (j > 0)
        j--;

    // Prepare data for programming for C28
    // "flashData" structure resides in RAM S0 block, which is dedicated to M3
    for (i = 0; i < 1024; i++){
        flashData.dataBuffer[i] = i;
    }
    flashData.numOfWords = 1024;
    flashData.flashAddress = 0x00128000;    // Sector F

    // Now set a command for Erasing C28 flash sector
    flashData.cmd = M3_CMD_ERASE_FLASH;
    flashData.sectorMask = SECTOR_F_MASK;

    // By setting IPC_FLAG 10, we tell C28 that all needed data is prepared, command issued (M3_CMD_ERASE_FLASH)
    // and it can perform this command
    IPCMtoCFlagSet(IPC_FLAG10);

    // Now we should wait for acknowledge of this flag
    while (IPCMtoCFlagBusy(IPC_CTOMIPCSTS_IPC10) == 1){};

    // By setting IPC_FLAG 11, C28 will tell us, that it had performed operation
    while (IPCCtoMFlagBusy(IPC_CTOMIPCSTS_IPC11) == 0){};
    IPCCtoMFlagAcknowledge(IPC_CTOMIPCSTS_IPC11);

    // Now when flash is erased, we can program it with our block
    flashData.cmd = M3_CMD_FLASH_DATA;
    IPCMtoCFlagSet(IPC_FLAG10);
    while (IPCMtoCFlagBusy(IPC_CTOMIPCSTS_IPC10) == 1){};
    while (IPCCtoMFlagBusy(IPC_CTOMIPCSTS_IPC11) == 0){};
    IPCCtoMFlagAcknowledge(IPC_CTOMIPCSTS_IPC11);

    while (1){

        IPCMtoCFlagBusy(IPC_CTOMIPCSTS_IPC11) == 0;
        IPCMtoCFlagSet(IPC_FLAG12);
    }
}