os_cpu.h

uc/fs文件系统

/*******
*********************************************************************************************************
*                                               uC/OS-II
*                                        The Real-Time Kernel
*
*                        (c) Copyright 1992-1998, Jean J. Labrosse, Plantation, FL
*                                          All Rights Reserved
*                        (c) Copyright ARM Limited 1999.  All rights reserved.
*
*                                          ARM Specific code
*
* File : 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 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 int   OS_STK;                     /* Each stack entry is 16-bit wide                    */

/*
*********************************************************************************************************
*                                          Processor Specifics
*********************************************************************************************************
*/
#define OS_CRITICAL_METHOD  1


#define	OS_ENTER_CRITICAL()	ARMDisableInt()
#define	OS_EXIT_CRITICAL()	ARMEnableInt()

#define OS_STK_GROWTH		1						// stacks grow from high to low  


#define OS_TASK_SW			OSCtxSw


/* 
*********************************************************************************************************
                              ARM, various architectures
*********************************************************************************************************
*/
// Definitions specific to ARM/uHAL
#define	SVC32MODE	0x13


// angel takes up stack 
#define SEMIHOSTED_STACK_NEEDS 1024

// idle task stack size (words) 
#ifdef SEMIHOSTED
#define OS_IDLE_STK_SIZE        (32+SEMIHOSTED_STACK_NEEDS)
#else
#define OS_IDLE_STK_SIZE        32
#endif

// defined in os_cpu_a.s 
extern void OSCtxSw(void);           			// task switch routine
extern void OSIntCtxSw(void);           		// interrupt context switch
extern void OSTickISR(void);					// timer interrupt routine
extern void ARMDisableInt(void);        		// disable global interrupts
extern void ARMEnableInt(void);         		// enable global interrupts