interrupt.c

摩托罗拉处理器mpc855上的UCOS移植代码

#ifndef  OS_MASTER_FILE
#include "includes.h"
#endif

#pragma interrupt on

enum t_prio { T_L_A_PRIO = 2, T_L_B_PRIO, T_L_C_PRIO, T_L_D_PRIO, T_N_5_PRIO, T_N_6_PRIO };

void InterruptHandler(INT32U);

/*
*********************************************************************************************************
*                                        INTERRUPT HANDLER
*
* Description: This function is called by the assembly file to handle the interrupt.
*
* Arguments  : except Number:	The number of the exception, as follows, in GPR3:
*										0x0100 System Reset
*										0x0200 Machine Check
*										0x0300 Data Storage
*										0x0400 Instruction Storage
*										0x0500 External Interrupt
*										0x0600 Alignment
*										0x0700 Program
*										0x0800 Floating Point Unavailable
*										0x0900 Decrementer Interrupt
*										0x0C00 System Call
*										0x0D00 Trace
*										0x0E00 FP Assist
*										0x0F00 PPC740 and PPC750: Performance Monitor
*										0x1000 MPC8xx and MPC505:	Software Emulation
*												 PPC603e:			Instruction TLB Miss
*										0x1100 MPC8xx:				Instruction TLB Miss
*												 PPC603e:			Data Load TLB Miss
*										0x1C00 MPC8xx and MPC505:	Data breakpoint
*										0x1D00 MPC8xx and MPC505:	Instruction breakpoint
*										0x1E00 MPC8xx and MPC505:	Peripheral breakpoint
*										0x1F00 MPC8xx and MPC505:	Non-maskable development port
*
* Returns    : None
*
* Note(s)    : 
*********************************************************************************************************
*/
void InterruptHandler(INT32U exceptNumber)
{
	OSIntNesting++;
	switch(exceptNumber)
	{
   /* Note to user: insert additional interrupt cases HERE. */
	case 0x900: 							/* Decrementer Interrupt */
		OSTimeTick();						/*	Call uC/OSII time tick handler */
		SetDecrementer();					/*	Re-load DEC counter */
	default:
		puts("\nException Interrupt");
		break;
	ExitCritical();
	OSIntNesting--;
	ReturnFromInterrupt();
	}
}

#pragma interrupt off