FPGA与6678配置了srio通信，Nwrite和Nread读写没问题。
设置好DSP端interrupt_ctl[0]和ICRR，配置FPGA发出doorbell，6678端触发不了doorbell中断，无法进入中断服务程序，手动置位system interrupt则可以触发中断，
但是观察CCS寄存器窗口可以发现ICSR对应bit已经被置1（实际为0x0020,，即bit5=1），EVTFLAG[0]=0，IFR=0，是否是哪里配置错误，无法正确的路由到INTDSTx映射到系统中断。
实际使用的是INTDST5
查表发现INTDST5对应system interrupt=117
doorbell映射到系统中断配置如下：
CSL_SRIO_SetDoorbellRoute(hSrio, 1);//使用INTDST0-15
for (i = 0; i < 16; i++)
{
CSL_SRIO_RouteDoorbellInterrupts(hSrio, 0, i, i);//将doorbit i映射到INTDST0-INTDST15
}
请问是什么原因导致无法进入中断服务程序，（cmd中已经为.csl_vect在section中分配了memory）
系统中断配置如下：
/* INTC module initialization */
intcContext.eventhandlerRecord = EventHandler;
intcContext.numEvtEntries = 10;
if (CSL_intcInit(&intcContext) != CSL_SOK)
{
printf("Error: GEM-INTC initialization failed\n");
return;
}
/* Enable NMIs */
if (CSL_intcGlobalNmiEnable() != CSL_SOK)
{
printf("Error: GEM-INTC global NMI enable failed\n");
return;
}
/* Enable global interrupts */
if (CSL_intcGlobalEnable(&state) != CSL_SOK)
{
printf ("Error: GEM-INTC global enable failed\n");
return;
}
/* Open the INTC Module for Vector ID: 4 and Event ID: 63 (C6678) 59 (C6670)
* Refer to the interrupt architecture and mapping document for the Event ID (INTC0_OUT3)*/
vectId = CSL_INTC_VECTID_4;
hTest = CSL_intcOpen (&intcObj, 63, &vectId , NULL);//event id=63,host interrupt=3
if (hTest == NULL)
{
printf("Error: GEM-INTC Open failed\n");
return;
}
/* Register an call-back handler which is invoked when the event occurs. */
EventRecord.handler = &test_isr_handler;
EventRecord.arg = 0;
if (CSL_intcPlugEventHandler(hTest,&EventRecord) != CSL_SOK)
{
printf("Error: GEM-INTC Plug event handler failed\n");
return;
}
/* Enabling the events. */
if (CSL_intcHwControl(hTest,CSL_INTC_CMD_EVTENABLE, NULL) != CSL_SOK)
{
printf("Error: GEM-INTC CSL_INTC_CMD_EVTENABLE command failed\n");
return;
}
printf ("Debug: GEM-INTC Configuration Completed\n");
/**************************************************
************* CPINTC-0 Configuration *************
**************************************************/
printf ("Debug: CPINTC-0 Configuration...\n");
/* Open the handle to the CPINT Instance */
hnd = CSL_CPINTC_open(0);
if (hnd == 0)
{
printf ("Error: Unable to open CPINTC-0\n");
return;
}
/* Disable all host interrupts. */
CSL_CPINTC_disableAllHostInterrupt(hnd);
/* Configure no nesting support in the CPINTC Module. */
CSL_CPINTC_setNestingMode (hnd, CPINTC_NO_NESTING);
/* We now map System Interrupt 0 - 3 to channel 3 */
CSL_CPINTC_mapSystemIntrToChannel (hnd, 117 , 3);
/* We now enable system interrupt 0 - 3 */
CSL_CPINTC_enableSysInterrupt (hnd, 117);
/* We enable host interrupts. */
CSL_CPINTC_enableHostInterrupt (hnd, 3);
/* Enable all host interrupts also. */
CSL_CPINTC_enableAllHostInterrupt(hnd);
手动置位中断号则可以触发中断，并且进入中断服务程序
//手动system interrupt 117可以触发中断
((CSL_CPINTC_RegsOvly)CSL_CP_INTC_0_REGS)->STATUS_SET_INDEX_REG = 117;
