os_cpu.h

Renesas(Hitachi SuperH)SH7708的UCOS2源码,uC/OS-II 版本2.52.

/*
*********************************************************************************************************
*                                               uC/OS-II
*                                        The Real-Time Kernel
*
*                        (c) Copyright 1992-1998, Jean J. Labrosse, Plantation, FL
*                                          All Rights Reserved
*
*                                       Hitachi SH3 Specific code
*
*
* File : OS_CPU.H
* By   : Kuan, Yeou-Fuh
*********************************************************************************************************
*/
#include <machine.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 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 long  OS_STK;                   /* Each stack entry is 32-bit wide                    */
typedef	unsigned long	OS_CPU_SR;					/* define for cpu_sr */

/* #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  */


OS_CPU_EXT void disable_ints (INT32U *a);
OS_CPU_EXT void enable_ints (INT32U *a);

OS_CPU_EXT INT32U vect_level;

/*
*********************************************************************************************************
*                              Hitachi SH3
*
* 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 enabled when
*             leaving the critical section.
*********************************************************************************************************
*/
#define  OS_CRITICAL_METHOD    3

#if      OS_CRITICAL_METHOD == 1
#define  OS_ENTER_CRITICAL() (set_imask(15))              /* Disable interrupts  */
#define  OS_EXIT_CRITICAL()  (set_imask(0))               /* Enable  interrupts  */
#endif

#if      OS_CRITICAL_METHOD == 2
#define  OS_ENTER_CRITICAL()  disable_ints (&vect_level)  /* Disable interrupts  */
#define  OS_EXIT_CRITICAL()   enable_ints (&vect_level)   /* Enable  interrupts  */
#endif

#if		OS_CRITICAL_METHOD == 3
#define	OS_ENTER_CRITICAL()	cpu_sr = get_cr();
#define	OS_EXIT_CRITICAL()	set_cr(cpu_sr);
#endif
/*
*********************************************************************************************************
*                           Hitachi SH3 Miscellaneous
*********************************************************************************************************
*/

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

#define  uCOS                 33                    /* Trap number used for context switch    */

#define  OS_TASK_SW()         trapa (uCOS)          /* intrinsic function to execute TRAPA instruction */

/*
*********************************************************************************************************
*                                            GLOBAL VARIABLES
*********************************************************************************************************
*/