www.pudn.com > 51ucosii.zip > OS_CPU.H, change:2002-04-13,size:4135b


/* 
********************************************************************************************************* 
*                                               uC/OS-II 
*                                        The Real-Time Kernel 
* 
*                         (c) Copyright 1992-2000, Jean J. Labrosse, Weston, FL 
*                                          All Rights Reserved 
* 
*                                       Philips XA Specific code 
*                                          LARGE MEMORY MODEL 
* 
* File : OS_CPU.H 
* By   : Jean J. Labrosse 
********************************************************************************************************* 
*/ 
 
#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 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 char   OS_STK;                   /* Each stack entry is 16-bit wide                    */ 
 
#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 
 
/*  
********************************************************************************************************* 
*                                        CRITICAL SECTION CONTROL 
* 
* 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.   
* 
* 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.   
*             The XA port doesn't currently support this method. 
********************************************************************************************************* 
*/ 
#define  OS_CRITICAL_METHOD    1 
 
 
#if      OS_CRITICAL_METHOD == 1 
#define  OS_ENTER_CRITICAL()  EA = 0             /* Disable interrupts                                 */ 
#define  OS_EXIT_CRITICAL()   EA = 1             /* Enable  interrupts                                 */ 
#endif 
 
/* 
********************************************************************************************************* 
*                                           MISCELLANEOUS 
********************************************************************************************************* 
*/ 
 
#define  OS_STK_GROWTH        1           /* Stack grows from HIGH to LOW memory on XA            */ 
 
#define  OS_TASK_SW()        _intxa(31)        /* Trap #15, (Interrupt 31) invokes OSCtxSw()           */