os_cpu.h

自己写的

/*
*********************************************************************************************************
*                                               uC/OS-II
*                                        The Real-Time Kernel
*
*                         (c) Copyright 1992-2002, Jean J. Labrosse, Weston, FL
*                                          All Rights Reserved
*
* File         : OS_CPU.H
* By           : Jean J. Labrosse
*********************************************************************************************************
*/

/*
*********************************************************************************************************
*                                               MIPS Port
*
*                 Target           : MIPS (Includes 4Kc)
*                 Ported by        : Michael Anburaj
*                 URL              : http://geocities.com/michaelanburaj/    Email : [e-mail]
*
*********************************************************************************************************
*/


#include "config.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 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 long long      INT64U;                   /* Signed   64 bit quantity                           */
typedef float          FP32;                     /* Single precision floating point                    */
typedef double         FP64;                     /* Double precision floating point                    */

#define BYTE           INT8U                     /* Define data types for backward compatibility ...   */
#define HWORD          INT16U 
#define WORD           INT32U                    /* ... uC/OS-II.                                      */

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) */



/* Don't modify these lines. This port can only support OS_CRITICAL_METHOD 3. */
#define  OS_CRITICAL_METHOD    3

#if      OS_CRITICAL_METHOD == 3
#define  OS_ENTER_CRITICAL()   (cpu_sr = SOCDisableInt())    /* Disable interrupts                        */
#define  OS_EXIT_CRITICAL()    (SOCEnableInt(cpu_sr))     /* Restore  interrupts                       */
#endif

/*
*********************************************************************************************************
*                           ARM Miscellaneous
*********************************************************************************************************
*/

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

#define  OS_TASK_SW()         OSCtxSw()

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


/*
*********************************************************************************************************
*                                              PROTOTYPES
*********************************************************************************************************
*/


extern void OSCtxSw(void);
extern void OSIntCtxSw(void);
extern void SOC_INTHandler(void);

#if OS_CRITICAL_METHOD == 3                      // Allocate storage for CPU status register          
OS_CPU_SR  SOCDisableInt(void);
void       SOCEnableInt(OS_CPU_SR cpu_sr);
#endif

/*GET CPU STATUS */
extern unsigned long CP0_wGetSR(void);
extern unsigned long CP0_GetCAUSE(void);
extern unsigned long CP0_GetEPC(void);



/*
*********************************************************************************************************
*                                              SOC 
*********************************************************************************************************
*/
/*
extern void SOCDisableInt(void);
extern void SOCEnableInt(void);
*/