os_cpu.h

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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
*********************************************************************************************************
*/

#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 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;

#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 ADS

/* 
*********************************************************************************************************
*                              ARM, various architectures
*
*********************************************************************************************************
*/


#if defined (ADS)
#define OS_CRITICAL_METHOD  3
#define	OS_ENTER_CRITICAL()	(cpu_sr = OSCPUSaveSR())
#define	OS_EXIT_CRITICAL()	(OSCPURestoreSR(cpu_sr))
#endif

/*
 * Definitions specific to ARM/uHAL
 */
#define	SVCMODE	0x13

/* stack stuff */
#define OS_STK_GROWTH    1
#define OS_TASK_SW()    OSCtxSw()

void UCOS_IRQHandler(void);
void OSCtxSw(void);
void OSIntCtxSw(void);



#if OS_CRITICAL_METHOD == 3                      /* Allocate storage for CPU status register           */
OS_CPU_SR  OSCPUSaveSR(void);
void       OSCPURestoreSR(OS_CPU_SR cpu_sr);
#endif