os_cpu.h

适用于MPC555的uCOS接口程序

/*
*********************************************************************************************************
*                                               uC/OS-II
*                                         The Real-Time Kernel
*
*                            (c) Copyright 1999, Jean J. Labrosse, Weston, FL
*                                          All Rights Reserved
*
*
*                                          PPC555 Specific code
*                                          CodeWarrior V6.5
*
* File         : OS_CPU.H
* By           : Liuyuan, Tianshuo
* e-mail       : [e-mail]; [e-mail]
*********************************************************************************************************
*/


#define OS_ENTER_CRITICAL() asm {mtspr EID,r0}	// Disabling External Interrupt
#define OS_EXIT_CRITICAL()  asm {mtspr EIE,r0}	// Enable External Interrupt
#define OS_TASK_SW() asm { sc }   

asm void OS_Set_decrementer (void);

#define	OS_STK_GROWTH       1 	/* Stack grows from HIGH to LOW memory on PPC  */

#define COUNT_PER_SEC 999999	//define the count value of decrement counter per second



/*
*********************************************************************************************************
*                                              DATA TYPES
*********************************************************************************************************
*/

typedef unsigned char  BOOLEAN;
typedef unsigned char  INT8U;                    /* Unsigned  8 bit quantity                           */
typedef signed   char  INT8S;                    /* Signed    8 bit quantity                           */
typedef unsigned int   INT16U;                   /* Unsigned 16 bit quantity                           */
typedef signed   int   INT16S;                   /* Signed   16 bit quantity                           */
typedef unsigned long  INT32U;                   /* Unsigned 32 bit quantity                           */
typedef signed   long  INT32S;                   /* Signed   32 bit quantity                           */
typedef float          FP32;                     /* Single precision floating point                    */
typedef double         FP64;                     /* Double precision floating point                    */
typedef unsigned int   OS_STK;                   /* Each stack entry is 16-bit wide                    */


#ifndef  FALSE
#define  FALSE    0
#endif

#ifndef  TRUE
#define  TRUE     1
#endif