请问6678 采用HWI方式配置pcie中断没有生效是为什么？如何解决？

本帖最后由 一只耳朵怪 于 2018-6-25 11:30 编辑

参考开发包的pcieboot interrupt的例子，里面使用的CSL方式配置中断，而sys/bios下无法使用该方法，如果采用此方式直接导致系统挂掉，可能是对系统定时器中断造成影响，所以改为bios下的HWI方式配置中断，没有成功进入中断函数，而CSL方式是可以的。代码如下
CSL方式
    write_uart("Debug: GEM-INTC Configuration...nr");
    /* INTC module initialization */   
intcContext.eventhandlerRecord = EventHandler;   
intcContext.numEvtEntries      = 10;    
if (CSL_intcInit(&intcContext) != CSL_SOK)   
[         write_uart("Error: GEM-INTC initialization failed nr");        
return;   
]
    /* Enable NMIs */   
if (CSL_intcGlobalNmiEnable() != CSL_SOK)   
[      write_uart("Error: GEM-INTC global NMI enable failed nr");        
return;   
]
    /* Enable global interrupts */   
  if (CSL_intcGlobalEnable(&state) != CSL_SOK)     [   
write_uart("Error: GEM-INTC global enable failed nr");        
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, INTC0_OUT8, &vectId , NULL);   
if (hTest == NULL)   
[      write_uart("Error: GEM-INTC Open failednr");      
  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)   
  [   
write_uart("Error: GEM-INTC Plug event handler failednr");        
return;   
  ]
    /* Enabling the events. */   
if (CSL_intcHwControl(hTest,CSL_INTC_CMD_EVTENABLE, NULL) != CSL_SOK)   
  [      write_uart("Error: GEM-INTC CSL_INTC_CMD_EVTENABLE command failednr");        
return;   
  ]
    write_uart("Debug: GEM-INTC Configuration Completed nr");
    /**************************************************      ************* CPINTC-0 Configuration *************      **************************************************/
    write_uart("Debug: CPINTC-0 Configuration...nr");
    /* Open the handle to the CPINT Instance */   
hnd = CSL_CPINTC_open(0);   
if (hnd == 0)   
[      
write_uart("Error: Unable to open CPINTC-0nr");      
  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 50 to channel 8*/  
CSL_CPINTC_mapSystemIntrToChannel (hnd, PCIEXpress_Legacy_INTA, 8);
    /* We now enable system interrupt 50 */   
CSL_CPINTC_enableSysInterrupt (hnd, PCIEXpress_Legacy_INTA);
    /* We enable host interrupts. */   
CSL_CPINTC_enableHostInterrupt (hnd, 8);
    /* Enable all host interrupts also. */     
CSL_CPINTC_enableAllHostInterrupt(hnd);
    write_uart("Debug: CPINTC-0 Configuration Completednr");


HWI方式
Uint32 hostIntr =8;  
Uint32 sysIntr = PCIEXpress_Legacy_INTA;
    DEVICE_REG32_W(MAGIC_ADDR, 0);   
DEVICE_REG32_W(PCIE_LEGACY_A_IRQ_STATUS, 0x1);
    /************************************************      *************** INTC Configuration *************      ************************************************/   
write_uart("Debug: GEM-INTC Configuration...nr");
/* Map the System Interrupt i.e. the Interrupt Destination 0 interrupt to the DIO ISR Handler. */  
CpIntc_dispatchPlug(sysIntr, (CpIntc_FuncPtr)test_isr_handler, (UArg)0, TRUE);
/* The configuration is for CPINTC0. We map system interrupt 112 to Host Interrupt 8. */  
CpIntc_mapSysIntToHostInt(0, sysIntr, hostIntr);
/* Enable the Host Interrupt. */
CpIntc_enableHostInt(0, hostIntr);
/* Enable the System Interrupt */  
CpIntc_enableSysInt(0, sysIntr);
/* Get the event id associated with the host interrupt. */
int eventId = CpIntc_getEventId(hostIntr);  // will get eventid = 104
Hwi_Params params;
Hwi_Params_init(¶ms);
/* Host interrupt value*/  
params.arg = hostIntr;
/* Event id is 74 for your host interrupt */  
params.eventId = eventId;
/* Enable the Hwi */  
params.enableInt = TRUE;
/* This plugs the interrupt vector 4 and the ISR function. */  /* When using CpIntc, you must plug the Hwi fxn with CpIntc_dispatch */  /* so it knows how to process the CpIntc interrupts.*/  
Hwi_create(4, &CpIntc_dispatch, ¶ms, NULL);
    write_uart("Debug: CPINTC-0 Configuration Completednr");


配置完成后使能中断，接着触发中断

     *(volatile UInt32*)(0x21800188)=1;        //LEGACY_A_IRQ_ENABLE_SET
     *(volatile UInt32*)(0x21800180)=1;     //LEGACY_A_IRQ_STATUS_RAW

CSL方式可以，而HWI方式不行，不知道什么原因，是配置不对，还是有其他地方需要设置，希望大家能给点思路，谢谢。