rzkschedulerglobals.c

zilog的实时操作系统RZK,可以移植到多种处理器上

/*
* File			:	RZKSchedulerGlobals.c
*
*
* Description	:	This file contains declarations for global variables and 
*					constants required by Scheduler.
*
*
* Copyright 2004 ZiLOG Inc.  ALL RIGHTS RESERVED.
*
* This file contains unpublished confidential and proprietary information
* of ZiLOG, Inc.
* NO PART OF THIS WORK MAY BE DUPLICATED, STORED, PUBLISHED OR DISCLOSED 
* IN ANY FORM WITHOUT THE PRIOR WRITTEN CONSENT OF ZiLOG, INC.
* This is not a license and no use of any kind of this work is authorized
* in the absence of a written license granted by ZiLOG, Inc. in ZiLOG's 
* sole discretion 
*/


#include "ZSysgen.h"
#include "ZTypes.h"
#include "ZThread.h"
#include "ZQueue.h"
#include "ZScheduler.h"
#include "ZInterrupt.h"

#define pThread ((RZK_TCB_t *) hThread)
#define pCurrentThread ((RZK_TCB_t *) hCurrentThread) 


extern RZK_THREAD_CB_t nInterruptThread[1];

/* Lookup table to identify the high priority thread */
const UINT8 BitMap[256]={

							0,1,2,1,3,1,2,1,4,1,2,1,3,1,2,1,5,1,2,1,3,1,2,1,4,1,2,1,3,1,2,1,
							6,1,2,1,3,1,2,1,4,1,2,1,3,1,2,1,5,1,2,1,3,1,2,1,4,1,2,1,3,1,2,1,
							7,1,2,1,3,1,2,1,4,1,2,1,3,1,2,1,5,1,2,1,3,1,2,1,4,1,2,1,3,1,2,1,
							6,1,2,1,3,1,2,1,4,1,2,1,3,1,2,1,5,1,2,1,3,1,2,1,4,1,2,1,3,1,2,1,
							8,1,2,1,3,1,2,1,4,1,2,1,3,1,2,1,5,1,2,1,3,1,2,1,4,1,2,1,3,1,2,1,
							6,1,2,1,3,1,2,1,4,1,2,1,3,1,2,1,5,1,2,1,3,1,2,1,4,1,2,1,3,1,2,1,
							7,1,2,1,3,1,2,1,4,1,2,1,3,1,2,1,5,1,2,1,3,1,2,1,4,1,2,1,3,1,2,1,
							6,1,2,1,3,1,2,1,4,1,2,1,3,1,2,1,5,1,2,1,3,1,2,1,4,1,2,1,3,1,2,1

						   }	;

/** global variables */
TICK_t uDefaultTimeSlice;

#ifdef	RZK_STATISTIC
TICK_t lPreviousSwitch;
#endif

UINT8 bTaskChangeFlag;
UINT8 uNestedISRCount;

RZK_THREADHANDLE_t hCurrentThread = &nInterruptThread[0];
UINT8 uRegBankBusyBitMap = 0xfc;	/* Bank 0 for Memory Thread, while 1 for Interrupt Thread */
volatile UINT32  DQPriorityBitMap = 0x01; /* Startup Code runs as Interrupt Thread */

const UINT32 pMap[32]=
				{
				0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80,0x100,0x200,0x400,
				0x800,0x1000,0x2000,0x4000,0x8000,0x10000,0x20000,0x40000,
				0x80000,0x100000,0x200000,0x400000,0x800000,0x1000000,0x2000000,
				0x4000000,0x8000000,0x10000000,0x20000000,0x40000000,0x80000000
				};