急救！！5.0到6.0移值时，串口驱动问题

将5.0BSP移值到6.0 上时，运行到串口驱动时，就运行不下去了，
DNW提示信息：
WARNING: CReg2440Uart::CReg2440Uart failed to obtain processor frequency - using default value (66750000).
DEBUG: Serial2 SYSINTR : -766318612
WARNING: CReg2440Uart::CReg2440Uart failed to obtain processor frequency - using default value (66750000).

些消息相应的代码部分：
CReg2443Uart::CReg2443Uart(PULONG pRegAddr)
:   m_pReg(pRegAddr)
{
    m_fIsBackedUp = FALSE;
//    PROCESSOR_INFO procInfo;
//    DWORD dwBytesReturned;
//    if (!KernelIoControl(IOCTL_PROCESSOR_INFORMATION, NULL, 0, &procInfo, sizeof(PROCESSOR_INFO), &dwBytesReturned))
//    {
        m_s3c2443_pclk = S3C2443_PCLK;//DEFAULT_S3C2443_PCLK;
        RETAILMSG(TRUE, (TEXT("WARNING: CReg2440Uart::CReg2440Uart failed to obtain processor frequency - using default value (%d).\r\n"), m_s3c2443_pclk));
//    }
//    else
//    {
//        m_s3c2443_pclk = procInfo.dwClockSpeed;
//        RETAILMSG(TRUE, (TEXT("INFO: CReg2440Uart::CReg2440Uart using processor frequency reported by the OAL (%d).\r\n"), m_s3c2443_pclk));
//    }

}


        请问是什么原因？？

哪位帮帮忙呀，
先自己顶一下，