os_cpu.h

UCOS_II移植的（MEGA16,CVAVR）

#ifndef _OS_CPU_H_
#define _OS_CPU_H_

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

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 unsigned char  OS_STK;                   /* Each stack entry is 16-bit wide                    */
typedef unsigned char  OS_CPU_SR;                /* Define size of CPU status register (PSW = 16 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

#define  OS_CRITICAL_METHOD    3

#if      OS_CRITICAL_METHOD == 3
#define  OS_ENTER_CRITICAL()  (cpu_sr = OS_CPU_SR_Save()) /* Disable interrupts                        */
#define  OS_EXIT_CRITICAL()   (OS_CPU_SR_Restore(cpu_sr)) /* Enable  interrupts                        */
#endif


#define  OS_STK_GROWTH        1                       /* Stack grows from HIGH to LOW memory on 80x86  */

#define  OS_TASK_SW()         OSCtxSw()


#if OS_CRITICAL_METHOD == 3
OS_CPU_SR  OS_CPU_SR_Save();
void       OS_CPU_SR_Restore(OS_CPU_SR cpu_sr);
#endif

void       OSTickISR_Init(void);
void       OSTickISR_Handler(void);

#endif