microblaze的中断实验

joe · 发表于 2022-4-8 10:37:54

BD图见：http://bbs.risc-v.org.cn/thread-251-1-1.html
实验现象就是：在vivado的Hardware manager中将VIO的输出从0设置为1,则就会进入microblaze的VIO对应的中断函数。
实验图示如下：

实验源码如下：
xbram_example.c:

/******************************************************************************
*
* Copyright (C) 2010 - 2014 Xilinx, Inc. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* XILINX BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Except as contained in this notice, the name of the Xilinx shall not be used
* in advertising or otherwise to promote the sale, use or other dealings in
* this Software without prior written authorization from Xilinx.
*
******************************************************************************/
/*****************************************************************************/
/**
* @file xbram_example.c
*
* This file contains a self test example using the BRAM driver (XBram).
*
*
* <pre>
* MODIFICATION HISTORY:
*
* Ver Who Date Changes
* ----- ---- -------- -------------------------------------------------------
* 1.00a sa 05/11/10 Initial release.
* 3.01a sa 13/01/12 Changed XBram_SelfTest(InstancePtr) to
* XBram_SelfTest(InstancePtr,0) as per
* new API (CR 639274)
* 4.1 ms 01/23/17 Modified xil_printf statement in main function to
* ensure that "Successfully ran" and "Failed" strings are
* available in all examples. This is a fix for CR-965028.
*</pre>
*
******************************************************************************/
/***************************** Include Files *********************************/
#include "xparameters.h"
#include "xbram.h"
#include <stdio.h>
#include "sys_intc.h"
#include <xintc.h>
#include <sleep.h>
/************************** Constant Definitions *****************************/
/*
* The following constants map to the XPAR parameters created in the
* xparameters.h file. They are defined here such that a user can easily
* change all the needed parameters in one place.
*/
#define BRAM_DEVICE_ID XPAR_BRAM_0_DEVICE_ID
#define LMB_DEVICE_ID XPAR_LMB_BRAM_IF_CNTLR_0_DEVICE_ID
/************************** Function Prototypes ******************************/
int BramExample(u16 DeviceId);
static void InitializeECC(XBram_Config *ConfigPtr, u32 EffectiveAddr);
/************************** Variable Definitions *****************************/
/*
* The following are declared globally so they are zeroed and so they are
* easily accessible from a debugger
*/
XBram Bram; /* The Instance of the BRAM Driver */
XBram lmbBram;
#define VIO_INTR_ID XPAR_INTC_0_DEVICE_ID
static XIntc Intc;
void VioHandler(void *CallbackRef);
void init_intr_sys(void);
/****************************************************************************/
/**
*
* This function is the main function of the BRAM example.
*
* @param None.
*
* @return
* - XST_SUCCESS to indicate success.
* - XST_FAILURE to indicate failure.
*
* @note None.
*
*****************************************************************************/
#ifndef TESTAPP_GEN
int main(void)
{
int Status;
Status = BramExample(BRAM_DEVICE_ID);
if (Status != XST_SUCCESS ) {
xil_printf("Bram Example Failed\r\n");
return XST_FAILURE;
}
init_intr_sys();
while(1){}
xil_printf("Successfully ran Bram Example\r\n");
return XST_SUCCESS;
}
void init_intr_sys(void)
{
Init_Intr_System(&Intc);
XIntc_Connect(&Intc, VIO_INTR_ID,
(Xil_ExceptionHandler)VioHandler, 0);
Intc_Enable(&Intc, VIO_INTR_ID);
Intc_Start(&Intc);
Setup_Intr_Exception(&Intc);
}
void VioHandler(void *CallbackRef)
{
usleep(5000);
}
#endif
/*****************************************************************************/
/**
*
* This is the entry point for the BRAM example.
*
* @param DeviceId is the XPAR_<BRAM_instance>_DEVICE_ID value from
* xparameters.h
*
* @return
* - XST_SUCCESS to indicate success.
* - XST_FAILURE to indicate failure.
*
* @note None.
*
******************************************************************************/
int BramExample(u16 DeviceId)
{
int Status;
XBram_Config *ConfigPtr;
/*
* Initialize the BRAM driver. If an error occurs then exit
*/
/*
* Lookup configuration data in the device configuration table.
* Use this configuration info down below when initializing this
* driver.
*/
ConfigPtr = XBram_LookupConfig(DeviceId);
if (ConfigPtr == (XBram_Config *) NULL) {
return XST_FAILURE;
}
Status = XBram_CfgInitialize(&Bram, ConfigPtr,
ConfigPtr->CtrlBaseAddress);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
InitializeECC(ConfigPtr, ConfigPtr->CtrlBaseAddress);
/*
* Execute the BRAM driver selftest.
*/
Status = XBram_SelfTest(&Bram, 0);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
/********joe code start****************/
XBram_Out8(ConfigPtr->MemBaseAddress,(u8)0x36);
volatile u8 data = XBram_In8(ConfigPtr->MemBaseAddress);
XBram_Out8(ConfigPtr->MemBaseAddress,(u8)0x37);
volatile u8 data2 = XBram_In8(ConfigPtr->MemBaseAddress);
// if(data != data2)
// {
// return XST_SUCCESS;
// }
// else
// {
// return XST_FAILURE;
// }
XBram_Config *lmbConfigPtr;
lmbConfigPtr = XBram_LookupConfig(LMB_DEVICE_ID);
if (lmbConfigPtr == (XBram_Config *) NULL) {
return XST_FAILURE;
}
Status = XBram_CfgInitialize(&lmbBram, lmbConfigPtr,
lmbConfigPtr->CtrlBaseAddress);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
InitializeECC(lmbConfigPtr, lmbConfigPtr->CtrlBaseAddress);
// XBram_Out8(lmbConfigPtr->MemBaseAddress,(u8)0x36);
data2 = XBram_In8(lmbConfigPtr->MemBaseAddress);
XBram_Out8(lmbConfigPtr->MemBaseAddress,(u8)0x37);
data = XBram_In8(lmbConfigPtr->MemBaseAddress);
if(data != data2)
{
return XST_SUCCESS;
}
else
{
return XST_FAILURE;
}
/********joe code end****************/
return XST_SUCCESS;
}
/****************************************************************************/
/**
*
* This function ensures that ECC in the BRAM is initialized if no hardware
* initialization is available. The ECC bits are initialized by reading and
* writing data in the memory. This code is not optimized to only read data
* in initialized sections of the BRAM.
*
* @param ConfigPtr is a reference to a structure containing information
* about a specific BRAM device.
* @param EffectiveAddr is the device base address in the virtual memory
* address space.
*
* @return
* None
*
* @note None.
*
*****************************************************************************/
void InitializeECC(XBram_Config *ConfigPtr, u32 EffectiveAddr)
{
u32 Addr;
volatile u32 Data;
if (ConfigPtr->EccPresent &&
ConfigPtr->EccOnOffRegister &&
ConfigPtr->EccOnOffResetValue == 0 &&
ConfigPtr->WriteAccess != 0) {
for (Addr = ConfigPtr->MemBaseAddress;
Addr < ConfigPtr->MemHighAddress; Addr+=4) {
Data = XBram_In32(Addr);
XBram_Out32(Addr, Data);
}
XBram_WriteReg(EffectiveAddr, XBRAM_ECC_ON_OFF_OFFSET, 1);
}
}

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sys_intc.h:

#ifndef SYS_INTR_H_
#define SYS_INTR_H_
#include "xparameters.h"
#include "xil_exception.h"
#include "xdebug.h"
#include "XIntc.h"
int Init_Intr_System(XIntc * IntcInstancePtr);
void Intc_Enable(XIntc *IntcInstancePtr,u16 Intr_Id);
int Intc_Start(XIntc *IntcInstancePtr);
void Setup_Intr_Exception(XIntc * IntcInstancePtr);
#endif /* SYS_INTR_H_ */

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sys_intc.c:

/*
* sys_intc.c
*
* Created on: 2022年4月8日
* Author: joe
*/
#include "sys_intc.h"
#include "xil_types.h"
#define INTC_DEVICE_ID XPAR_INTC_0_DEVICE_ID
void Setup_Intr_Exception(XIntc * IntcInstancePtr)
{
/* Enable interrupts from the hardware */
Xil_ExceptionInit();
Xil_ExceptionRegisterHandler(XIL_EXCEPTION_ID_INT,
(Xil_ExceptionHandler)XIntc_InterruptHandler,
(void *)IntcInstancePtr);
Xil_ExceptionEnable();
}
int Init_Intr_System(XIntc * IntcInstancePtr)
{
int Status;
Status = XIntc_Initialize(IntcInstancePtr, INTC_DEVICE_ID);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
return XST_SUCCESS;
}
void Intc_Enable(XIntc *IntcInstancePtr,u16 Intr_Id)
{
XIntc_Enable(IntcInstancePtr, Intr_Id);
}
int Intc_Start(XIntc *IntcInstancePtr)
{
int Status = XIntc_Start(IntcInstancePtr, XIN_REAL_MODE);
if(Status != XST_SUCCESS){
return XST_FAILURE;
}
return XST_SUCCESS;
}

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