isr.c

三星S34510板子上移植的uCosII源码

#include "isr.h"
#include "typDef.h"
#include "head.h"

volatile UINT32  IntOffSet;

void (*InterruptHandlers[MAXHNDLRS])(void);
static void DummyIsr(void) {}

void ClrIntStatus(void)
{
    INTMASK = 0x3fffff;  // All interrupt disabled include global bit
    INTPEND = 0x1fffff;  // All clear pending
    INTMODE = 0x0;  // All IRQ mode
  //  INTMODE = 0x1fffff;  // All FIQ mode

    /* 
     * Interrupt Priority Reset value. Need to be changed priority,
     * Set interrupt priority register. In this case, Global interrupt
     * mask bit must be disabled.
     *
     */ 
    //INTPRI0 = 0x03020100;  
    //INTPRI1 = 0x07060504;
    //INTPRI2 = 0x0b0a0908;
    //INTPRI3 = 0x0f0e0d0c;
    //INTPRI4 = 0x13121110;
    //INTPRI5 = 0x00000014;
    //INTOFFSET =  Read Only Register
}



void ISR_UndefHandler(void)
{
}
void ISR_PrefetchHandler(void)
{
}
void ISR_AbortHandler(void)
{
}
void ISR_IrqHandler(void)
{
        IntOffSet = INTOFFSET;
        Clear_PendingBit(IntOffSet>>2) ;
       (*InterruptHandlers[IntOffSet>>2])(); // Call interrupt service routine
}
void ISR_FiqHandler(void)    
{
       IntOffSet =INTOFFSET;
       Clear_PendingBit(IntOffSet>>2) ;
       (*InterruptHandlers[IntOffSet>>2])(); // Call interrupt service routine
}




/***********************************************************************/
/* InitIntHandlerTable: Initialize the interrupt handler table         */
/*     NOTE(S): This should be called during system initialization     */
/***********************************************************************/
void InitIntHandlerTable(void)
{
	 REG32 i;
 
	for (i = 0; i < MAXHNDLRS; i++)
    		InterruptHandlers[i] = DummyIsr;
}

/*********************************************************/
/* SysSetInterrupt: Setup Interrupt Handler Vector Table */
/*********************************************************/
void SysSetInterrupt(REG32 vector, void (*handler)())
{
	InterruptHandlers[vector] = handler;

}

/*********************************************************/
/* InitInterrupt: Initialize Interrupt		 */
/*********************************************************/
void InitInterrupt(void) 
{
        ClrIntStatus();         // Clear All interrupt 
	InitIntHandlerTable() ;
}


void ARMDisableInt(void)
{
 Disable_Int(nGLOBAL_INT);
}

void ARMEnableInt(void)
{
 Enable_Int(nGLOBAL_INT);
}