[C6678 EVM] SPI Boot Parameter Table index looks wrong...

Hi,

I'm investigating the boot failure problem from SPI NOR on C6678 EVM.
I succeeded the booting with Boot Parameter Index as 0, but I failed if we changed it to 1. I checked the contents of SPI NOR, but I could not see any errors. The Boot Table Parameter resided at 0x80 offset on SPI NOR and its contents looked fine for me. 

So now I'm reviewing the ROM Bootloader source code and I have a question about the implementation. Please take a look at the following function:

void bootInitBootParamsSpi (BOOT_PARAMS_SPI_T *params)
{
    UINT32 v;

    params->length    = CHIP_WORDS_TO_BYTES(sizeof(BOOT_PARAMS_SPI_T));
    params->checksum  = 0;
    params->boot_mode = BOOT_MODE_SPI;
    params->portNum   = chipDefaultSpiPortNum ();

    v = chipDefaultSpiPll ();
    params->swPllCfg_msw = chipUpper16 (v);
    params->swPllCfg_lsw = chipLower16 (v);


    params->options   = chipDefaultSpiOptions ();

    params->addrWidth = chipDefaultSpiAddrWidth ();
    params->nPins     = chipDefaultSpiNPins ();
    params->csel      = chipDefaultSpiCsel ();
    params->mode      = chipDefaultSpiMode ();
    params->c2tdelay  = chipDefaultSpiC2tDelay ();

    params->cpuFreqMhz = chipCoreFreqMhz ();
    params->busFreqMhz = chipDefaultSpiBusFreqMhz ();
    params->busFreqKhz = chipDefaultSpiBusFreqKhz ();

    v = chipDefaultSpiReadAddr ();
    params->read_addr_msw = chipUpper16 (v);
    params->read_addr_lsw = chipLower16 (v);

    params->next_csel = chipDefaultSpiNextCsel ();

    v = chipDefaultSpiNextReadAddr ();
    params->next_read_addr_msw = chipUpper16 (v);
    params->next_read_addr_lsw = chipLower16 (v);

} /* bootInitBootParamsSpi */

Where, chipDefaultSpiReadAddr() is being defined as below:

 #define chipDefaultSpiReadAddr()            ((CHIP_WORDS_TO_BYTES(sizeof(BOOT_PARAMS_T))) * readDevstatBits(7,6))

As you see, readDevstatBits(7,6) is extracting data from bit6:7 bit-field from DEVSTAT register.
I believe this code is intended to extract "Parameter Table Index" from DEVSTAT register, but it looks wrong considering the datasheet descriptions -- Datasheet says Parameter Table index resides on bit4:7. Why does ROM Bootloader extract the data from this part ? 

I'm wondering if this might be a bug on ROM Bootloader. The interesting point was the booting was succeeded when DEVSTAT was configured as 0x144D. Considering the datasheet spec, this should not be correct configuration for the index 1, but ROM bootloader seems it regards the Boot Parameter Index as 1 (bit6:7 can be regarded as 1) and understands that boot parameter is existing at 0x80 offset on SPI NOR Flash, and eventually, the boot looks being succeeded. 

Best Regards,
Naoki Kawada