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/* 
********************************************************************************************************* 
*                                               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 
********************************************************************************************************* 
*/ 
#ifndef __OS_CPU_H__ 
#define __OS_CPU_H__ 
 
#include "..\inc\44b.h" 
#include "..\inc\44blib.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 int  	INT32U;                   /* Unsigned 32 bit quantity                           */ 
typedef signed   int  	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                    */ 
typedef unsigned int   OS_CPU_SR;                /* 定义CPU 状态寄存器数据宽度(PSR = 32 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 
 
/*  
********************************************************************************************************* 
*                              ARM, various architectures 
* 
********************************************************************************************************* 
*/ 
#define  OS_CRITICAL_METHOD 2 
 
#if 	OS_CRITICAL_METHOD == 2 
#define	OS_ENTER_CRITICAL()	ARMDisableInt() 
#define	OS_EXIT_CRITICAL()	ARMEnableInt() 
#endif 
 
#if     OS_CRITICAL_METHOD == 3 
#define	OS_ENTER_CRITICAL()  (cpu_sr = OSCPUSaveSR()) 
#define	OS_EXIT_CRITICAL()   (OSCPURestoreSR(cpu_sr)) 
#endif 
 
#define OS_TASK_SW			OSCtxSw 
/* 
 * Definitions specific to ARM/uHAL 
 */ 
#define	SVC32MODE	0x13 
 
/* stack stuff */ 
#define OS_STK_GROWTH    1 
 
/* 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 ARMDisableInt(void);        // disable global interrupts 
extern void ARMEnableInt(void);         // enable global interrupts 
extern void OSTickISR(void);		// timer interrupt routine 
OS_CPU_SR  	OSCPUSaveSR(void); 
void       	OSCPURestoreSR(OS_CPU_SR cpu_sr); 
 
#endif