用DIRECTIO函数发送数据有的时候会在KeyStone_SRIO_wait_LSU_completion里面的do while循环里，不出来这是为什么？

本帖最后由 一只耳朵怪 于 2018-6-19 15:18 编辑

Uint32 KeyStone_SRIO_wait_LSU_completion(Uint32 lsuNum,
Uint32 transactionID, Uint32 contextBit)
[
Uint32 uiStateIndex= LSU_state_index_table[lsuNum][transactionID];
Uint32 uiCompletionCode;
do
[
  uiCompletionCode=(gpSRIO_regs->LSU_STAT_REG[uiStateIndex/8]>>
   ((uiStateIndex&7)*4))&0xF;
]
while((uiCompletionCode&1) != contextBit);
return (uiCompletionCode>>1);
]

Int32 KeyStone_SRIO_DirectIO(Uint32 uiLocalAddress, Uint32 uiRemoteAddress,
Uint32 uiDestID, Uint32 uiByteCount, Uint32 uiPort, Uint32 uiLSU_No,
Srio_Ftype ftype,SRIO_Packet_Type packetType,Uint32 uiIdSize)
[
SRIO_LSU_Transfer lsuTransfer;
    lsuTransfer.rioAddressMSB =0;
    lsuTransfer.rioAddressLSB_ConfigOffset = uiRemoteAddress;
    lsuTransfer.localDspAddress = uiLocalAddress;
    lsuTransfer.bytecount = uiByteCount;
    lsuTransfer.packetType = packetType;
    lsuTransfer.ftype = ftype;
    lsuTransfer.dstID = uiDestID;
    lsuTransfer.doorbellInfo= 0;
    lsuTransfer.waitLsuReady= 1;
    lsuTransfer.lsuNum= uiLSU_No;
    lsuTransfer.doorbellValid = 0;
    lsuTransfer.intrRequest = 0;
    lsuTransfer.supGoodInt = 0;
    lsuTransfer.priority = 0;
    lsuTransfer.outPortID = uiPort;
    lsuTransfer.idSize = uiIdSize;
    lsuTransfer.srcIDMap = 0;
    lsuTransfer.hopCount = 0;
KeyStone_SRIO_LSU_transfer(&lsuTransfer);
return KeyStone_SRIO_wait_LSU_completion(uiLSU_No,
  lsuTransfer.transactionID, lsuTransfer.contextBit);
]
请教高手，用DIRECTIO函数发送数据的时候，有的时候会在KeyStone_SRIO_wait_LSU_completion里面的do while循环里，不出来，代码如上面所示。请问这个大概是什么问题？但是有的时候他是可以发送数据的。有的时候就会死在里面。
还有一个问题，调用KeyStone_SRIO_DirectIO的时候，如果uiLocalAddress传入的是0xc000000就可以发送出去。而如果是0x860000,就不能发送，请问这是为什么？谢谢