os_cpu.h

5956470AT91RM9200-uCOS.rar

/*
*********************************************************************************************************
*                                               uC/OS-II
*                                        The Real-Time Kernel
*
*                             (c) Copyright 1992-2004, Micrium, Weston, FL
*                                          All Rights Reserved
*
* File : OS_CPU.H
* By   : Jean J. Labrosse
*********************************************************************************************************
*/

#ifndef OS_CPU_H
#define OS_CPU_H


#ifdef  OS_CPU_GLOBALS
#define OS_CPU_EXT
#else
#define OS_CPU_EXT  extern
#endif

/*
*********************************************************************************************************
*                                              DATA TYPES
*                                         (Compiler Specific)
*********************************************************************************************************
*/

typedef unsigned char  BOOLEAN;
typedef unsigned char  INT8U;                    /* Unsigned  8 bit quantity                           */
typedef signed   char  INT8S;                    /* Signed    8 bit quantity                           */
typedef unsigned short INT16U;                   /* Unsigned 16 bit quantity                           */
typedef signed   short INT16S;                   /* Signed   16 bit quantity                           */
typedef unsigned int  	INT32U;                   /* Unsigned 32 bit quantity                           */
typedef signed   int  	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                    */
typedef unsigned int   OS_CPU_SR;                /* Define size of CPU status register (PSR = 32 bits) */

#define BYTE           INT8S                     /* Define data types for backward compatibility ...   */
#define UBYTE          INT8U                     /* ... to uC/OS V1.xx.  Not actually needed for ...   */
#define WORD           INT16S                    /* ... uC/OS-II.                                      */
#define UWORD          INT16U
#define LONG           INT32S
#define ULONG          INT32U
/* 
*********************************************************************************************************
*                              ARM
*
* Method #1:  Disable/Enable interrupts using simple instructions.  After critical section, interrupts
*             will be enabled even if they were disabled before entering the critical section.
*             NOT IMPLEMENTED
*
* Method #2:  Disable/Enable interrupts by preserving the state of interrupts.  In other words, if 
*             interrupts were disabled before entering the critical section, they will be disabled when
*             leaving the critical section.
*             NOT IMPLEMENTED
*
* Method #3:  Disable/Enable interrupts by preserving the state of interrupts.  Generally speaking you
*             would store the state of the interrupt disable flag in the local variable 'cpu_sr' and then
*             disable interrupts.  'cpu_sr' is allocated in all of uC/OS-II's functions that need to 
*             disable interrupts.  You would restore the interrupt disable state by copying back 'cpu_sr'
*             into the CPU's status register.
*********************************************************************************************************
*/

#define     OS_CRITICAL_METHOD     2            /* 选择开、关中断的方式 */

__swi(0x00) void OS_TASK_SW(void);              /*  任务级任务切换函数          */
__swi(0x01) void _OSStartHighRdy(void);         /*  运行优先级最高的任务        */
__swi(0x02) void OS_ENTER_CRITICAL(void);       /*  关中断                      */
__swi(0x03) void OS_EXIT_CRITICAL(void);        /*  开中断                      */

__swi(0x40) void *GetOSFunctionAddr(int Index); /*  获取系统服务函数入口        */
__swi(0x41) void *GetUsrFunctionAddr(int Index);/*  获取自定义服务函数入口      */
__swi(0x42) void OSISRBegin(void);              /*  中断开始处理                */
__swi(0x43) int  OSISRNeedSwap(void);           /*  判断中断是否需要切换        */

__swi(0x80) void ChangeToSYSMode(void);         /*  任务切换到系统模式          */
__swi(0x81) void ChangeToUSRMode(void);         /*  任务切换到用户模式          */
__swi(0x82) void TaskIsARM(INT8U prio);         /*  任务代码是ARM代码           */
__swi(0x83) void TaskIsTHUMB(INT8U prio);       /*  任务代码是THUMB             */
/*
*********************************************************************************************************
*                                         ARM Miscellaneous
*********************************************************************************************************
*/

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

#define     USR32Mode       0x10                /*  用户模式                    */
#define     SYS32Mode       0x1f                /*  系统模式                    */
#define     NoInt           0x80

#ifndef USER_USING_MODE
#define	USER_USING_MODE	USR32Mode               /*  任务缺省模式                 */
#endif

#ifndef OS_SELF_EN
#define	OS_SELF_EN     0                        /*  允许返回OS与任务分别编译、固化*/    
#endif


OS_CPU_EXT INT32U OsEnterSum;                   /*  关中断计数器（开关中断的信号量）    */
#endif