S3C6410中断控制器

S3C6410中断控制器由2个VIC、2个TZIC组成，支持64个中断。

（1）每个VIC 支持 32位的矢量 IRP 中断

（2）支持固定硬件中断优先级和可编程中断优先级

（3）支持硬件中断优先级屏蔽和可编程中断优先级屏蔽

（4）产生 IRQ 和 FIQ  中断

（5）产生软件中断

（6）raw中断状态

（7）中断请求状态

（8）支持限制访问的特权模式

// VIC0
#define	rVIC0IRQSTATUS			(VIC0_BASE + 0x00)
#define	rVIC0FIQSTATUS			(VIC0_BASE + 0x04)
#define	rVIC0RAWINTR			(VIC0_BASE + 0x08)
#define	rVIC0INTSELECT			(VIC0_BASE + 0x0c)
#define	rVIC0INTENABLE			(VIC0_BASE + 0x10)
#define	rVIC0INTENCLEAR			(VIC0_BASE + 0x14)
#define	rVIC0SOFTINT			(VIC0_BASE + 0x18)
#define	rVIC0SOFTINTCLEAR		(VIC0_BASE + 0x1c)
#define	rVIC0PROTECTION			(VIC0_BASE + 0x20)
#define	rVIC0SWPRIORITYMASK		(VIC0_BASE + 0x24)
#define	rVIC0PRIORITYDAISY		(VIC0_BASE + 0x28)

#define rVIC0VECTADDR			(VIC0_BASE + 0x100)

#define rVIC0VECPRIORITY		(VIC0_BASE + 0x200)

#define rVIC0ADDR				(VIC0_BASE + 0xf00)
#define rVIC0PERID0				(VIC0_BASE + 0xfe0)
#define rVIC0PERID1				(VIC0_BASE + 0xfe4)
#define rVIC0PERID2				(VIC0_BASE + 0xfe8)
#define rVIC0PERID3				(VIC0_BASE + 0xfec)
#define rVIC0PCELLID0			(VIC0_BASE + 0xff0)
#define rVIC0PCELLID1			(VIC0_BASE + 0xff4)
#define rVIC0PCELLID2			(VIC0_BASE + 0xff8)
#define rVIC0PCELLID3			(VIC0_BASE + 0xffc)

// VIC1
#define	rVIC1IRQSTATUS			(VIC1_BASE + 0x00)
#define	rVIC1FIQSTATUS			(VIC1_BASE + 0x04)
#define	rVIC1RAWINTR			(VIC1_BASE + 0x08)
#define	rVIC1INTSELECT			(VIC1_BASE + 0x0c)
#define	rVIC1INTENABLE			(VIC1_BASE + 0x10)
#define	rVIC1INTENCLEAR			(VIC1_BASE + 0x14)
#define	rVIC1SOFTINT			(VIC1_BASE + 0x18)
#define	rVIC1SOFTINTCLEAR		(VIC1_BASE + 0x1c)
#define	rVIC1PROTECTION			(VIC1_BASE + 0x20)
#define	rVIC1SWPRIORITYMASK		(VIC1_BASE + 0x24)
#define	rVIC1PRIORITYDAISY		(VIC1_BASE + 0x28)

#define rVIC1VECTADDR			(VIC1_BASE + 0x100)

#define rVIC1VECPRIORITY		(VIC1_BASE + 0x200)

#define rVIC1ADDR				(VIC1_BASE + 0xf00)
#define rVIC1PERID0				(VIC1_BASE + 0xfe0)
#define rVIC1PERID1				(VIC1_BASE + 0xfe4)
#define rVIC1PERID2				(VIC1_BASE + 0xfe8)
#define rVIC1PERID3				(VIC1_BASE + 0xfec)
#define rVIC1PCELLID0			(VIC1_BASE + 0xff0)
#define rVIC1PCELLID1			(VIC1_BASE + 0xff4)
#define rVIC1PCELLID2			(VIC1_BASE + 0xff8)
#define rVIC1PCELLID3			(VIC1_BASE + 0xffc)


//////////
// Function Name : INTC_Init
// Function Description : This function initializes interrupt controller
// Input : NONE 
// Output : NONE
// Version : 
void INTC_Init(void)
{
#if (VIC_MODE==0)	
	u32 i;
	
	for(i=0;i<32;i++)
		Outp32(rVIC0VECTADDR+4*i, i);
	
	for(i=0;i<32;i++)
		Outp32(rVIC1VECTADDR+4*i, i+32);
#endif
	Outp32(rVIC0INTENCLEAR, 0xffffffff);        //清中断
	Outp32(rVIC1INTENCLEAR, 0xffffffff);

	Outp32(rVIC0INTSELECT, 0x0);                //设置为IRQ中断
	Outp32(rVIC1INTSELECT, 0x0);

	INTC_ClearVectAddr();                      //清除当前中断服务程序地址寄存器的内容

	return;
}

//////////
// Function Name : INTC_Enable
// Function Description : This function sets the corresponding bit of interrupt enable register
// Input : intNum, interrupt number to be enabled
// Output : NONE
// Version :                                打开中断访问的是rVIC0INTENABLE寄存器
void INTC_Enable(u32 intNum)
{
	u32 temp;

	if(intNum<32)
	{
		temp = Inp32(rVIC0INTENABLE);
		temp |= (1<<intNum);
		Outp32(rVIC0INTENABLE, temp);
	}
	else
	{
		temp = Inp32(rVIC1INTENABLE);
		temp |= (1<<(intNum-32));
		Outp32(rVIC1INTENABLE, temp);	
	}

	return;
}

//////////
// Function Name : INTC_Disable
// Function Description : This function sets the corresponding bit of interrupt enable clear register
// Input : intNum, interrupt number to be disabled
// Output : NONE
// Version :                            关闭中断访问rVIC0INTENCLEAR寄存器
void INTC_Disable(u32 intNum)
{
	u32 temp;

	if(intNum<32)
	{
		temp = Inp32(rVIC0INTENCLEAR);
		temp |= (1<<intNum);
		Outp32(rVIC0INTENCLEAR, temp);
	}
	else
	{
		temp = Inp32(rVIC1INTENCLEAR);
		temp |= (1<<(intNum-32));
		Outp32(rVIC1INTENCLEAR, temp);	
	}

	return;
}

//////////
// Function Name : INTC_ReadIntSrc
// Function Description : This function reads the interrupt source number
// Input : NONE
// Output : interrupt source number
// Version : 
u32 INTC_ReadIntSrc(void)                 //读取当前中断的中断服务程序的址
{
	u32 temp;
	
	temp = Inp32(rVIC0ADDR);
	
	return temp;
}

//////////
// Function Name : INTC_SetHandler
// Function Description : This function registers ISR to the corresponding number
// Input :	intNum, interrupt number to register
//			handler, interrupt handler
// Output : NONE
// Version : 
extern void (*IntHandlerTable[INT_LIMIT])(void) /*__irq*/;
void INTC_SetHandler(u32 intNum, void (*handler)() /*__irq*/)            设置一个中断的中断服务程序地址
{
	IntHandlerTable[intNum] = handler;
	
	return;
}

//////////
// Function Name : INTC_SetVectAddr
// Function Description : This function writes ISR to the corresponding vector address register
// Input :	intNum, interrupt number to register
//			handler, interrupt handler
// Output : NONE
// Version : 
void INTC_SetVectAddr(u32 intNum, void (*handler)(void) /*__irq*/)      设置一个中断的中断服务程序地址
{	
#if (VIC_MODE == 1)
	if(intNum<32)	//VIC0
	{
		Outp32(rVIC0VECTADDR+4*intNum, (unsigned)handler);
	}
	else	//VIC1
	{
		Outp32(rVIC1VECTADDR+4*(intNum-32), (unsigned)handler);
	}
#else
	INTC_SetHandler(intNum, handler);
#endif	
	return;
}


//////////
// Function Name : INTC_ClearVectAddr
// Function Description : This function clears the vector address register
// Input : NONE
// Output : NONE
// Version : 
void INTC_ClearVectAddr(void)                           //清除当前中断服务程序地址寄存器的内容
{
	Outp32(rVIC0ADDR, 0);
	Outp32(rVIC1ADDR, 0);
	
	return;
}


//////////
// Function Name : INTC_SetSoftInt
// Function Description : This function sets the Software interrupt register
// Input : intNum, interrupt number to be enabled
// Output : NONE
// Version : 
void INTC_SetSoftInt(u32 intNum)                   //软件设置一个中断
{
	u32 temp;

	if(intNum<32)
	{
		temp = Inp32(rVIC0SOFTINT);
		temp |= (1<<intNum);
		Outp32(rVIC0SOFTINT, temp);
	}
	else
	{
		temp = Inp32(rVIC1SOFTINT);
		temp |= (1<<(intNum-32));
		Outp32(rVIC1SOFTINT, temp);	
	}

	return;
}

//////////
// Function Name : INTC_ClearSoftInt
// Function Description : This function sets the Software interrupt register
// Input : intNum, interrupt number to be enabled
// Output : NONE
// Version : 
void INTC_ClearSoftInt(u32 intNum)
{
	u32 temp;

	if(intNum<32)
	{
		
		temp = (1<<intNum);
		Outp32(rVIC0SOFTINTCLEAR, temp);
	}
	else
	{
		
		temp = (1<<(intNum-32));
		Outp32(rVIC1SOFTINTCLEAR, temp);	
	}

	return;
}


//////////
// File Name : INTC_GetVicIrqStatus
// File Description : This function gets the IRQ Status register value
// Input : uController - VIC controller number
// Output : VICIRQSTATUS register value
// Version : 
u32 INTC_GetVicIrqStatus(u32 uController)                  //获取IRQ中断的状态
{
	if(uController == 0)
		return	Inp32(rVIC0IRQSTATUS);
	else if(uController == 1)
		return 	Inp32(rVIC1IRQSTATUS);

	return 0;
}

中断初始化调用：

#if	(VIC_MODE == 0)
extern void IsrIRQ(void);
#endif
void SYSTEM_InitException( void)
{
	pExceptionUNDEF		=	(u32)ExceptionUNDEF;
	pExceptionSWI  		=	(u32)ExceptionSWI;
	pExceptionPABORT	=	(u32)ExceptionPABORT;
	pExceptionDABORT	=	(u32)ExceptionDABORT;
#if (VIC_MODE == 0)	
	pExceptionIRQ		=	(u32)IsrIRQ;
#else
	pExceptionIRQ		=	(u32)ExceptionIRQ;
#endif		
	pExceptionFIQ		=	(u32)ExceptionFIQ;

	INTC_Init();

#if (VIC_MODE == 0)
	SYSTEM_DisableVIC();
#else
	SYSTEM_EnableVIC();
#endif
	SYSTEM_EnableIRQ();
	SYSTEM_EnableFIQ();
}