TMS320C6678: Timeout waiting for reply from PA to Pa_addMac command

公司设计的6678核心板，将堆物理存储设置为DDR3,网络初始化不成功，配置如下

var HeapMem = xdc.useModule('ti.sysbios.heaps.HeapMem');
var heapMemParams = new HeapMem.Params();
heapMemParams.size = 0x8000000;
heapMemParams.sectionName = "systemHeap";
Program.global.heap0 = HeapMem.create(heapMemParams);

/* This is the default memory heap. */
Memory.defaultHeapInstance = Program.global.heap0;
Program.sectMap["sharedL2"] = "MSMCSRAM";
Program.sectMap["systemHeap"] = "DDR3";

调试会出现如下错误：

Timeout waiting for reply from PA to Pa_addMac command

如果堆堆物理存储设置为MSMCSRAM，初始化正常通过，配置如下：

var HeapMem = xdc.useModule('ti.sysbios.heaps.HeapMem');
var heapMemParams = new HeapMem.Params();
heapMemParams.size = 0x8000000;
heapMemParams.sectionName = "systemHeap";
Program.global.heap0 = HeapMem.create(heapMemParams);

/* This is the default memory heap. */
Memory.defaultHeapInstance = Program.global.heap0;
Program.sectMap["sharedL2"] = "MSMCSRAM";
Program.sectMap["systemHeap"] = "MSMCSRAM";

DDR3初始化应该是成功了，不明白为什么堆的存储位置为什么会影响网络初始化；

对比调试evm6678评估板，堆使用DDR3,不会出现问题；