#define  OS_CPU_GLOBALS#include "includes.h"/***********************************************************************************************************                                        INITIALIZE A TASK'S STACK** Description: This function is called by either OSTaskCreate() or OSTaskCreateExt() to initialize the*              stack frame of the task being created.  This function is highly processor specific.** Arguments  : task          is a pointer to the task code**              pdata         is a pointer to a user supplied data area that will be passed to the task*                            when the task first executes.**              ptos          is a pointer to the top of stack.  It is assumed that 'ptos' points to*                            a 'free' entry on the task stack.  If OS_STK_GROWTH is set to 1 then *                            'ptos' will contain the HIGHEST valid address of the stack.  Similarly, if*                            OS_STK_GROWTH is set to 0, the 'ptos' will contains the LOWEST valid address*                            of the stack.**              opt           specifies options that can be used to alter the behavior of OSTaskStkInit().*                            (see uCOS_II.H for OS_TASK_OPT_???).** Returns    : Always returns the location of the new top-of-stack' once the processor registers have*              been placed on the stack in the proper order.** Note(s)    : Interrupts are enabled when your task starts executing. You can change this by setting the*              PSW to 0x0002 instead.  In this case, interrupts would be disabled upon task startup.  The*              application code would be responsible for enabling interrupts at the beginning of the task*              code.  You will need to modify OSTaskIdle() and OSTaskStat() so that they enable *              interrupts.  Failure to do this will make your system crash!**********************************************************************************************************/void *OSTaskStkInit (void (*task)(void *pd), void *pdata, void *ptos, INT16U opt){    unsigned int *stk;    opt    = opt;                           /* 'opt' is not used, prevent warning                      */    stk    = (unsigned int *)ptos;          /* Load stack pointer                                      */    /* build a context for the new task */    *--stk = (unsigned int) task;       /* pc */    *--stk = (unsigned int) task;       /* lr */    *--stk = 0;                         /* r12 */    *--stk = 0;                         /* r11 */    *--stk = 0;                         /* r10 */    *--stk = 0;                         /* r9 */    *--stk = 0;                         /* r8 */    *--stk = 0;                         /* r7 */    *--stk = 0;                         /* r6 */    *--stk = 0;                         /* r5 */    *--stk = 0;                         /* r4 */    *--stk = 0;                         /* r3 */    *--stk = 0;                         /* r2 */    *--stk = 0;                         /* r1 */    *--stk = (unsigned int) pdata;      /* r0 */    *--stk = (SVC32MODE|0x0);			/* cpsr  IRQ, FIQ disable*/    *--stk = (SVC32MODE|0x0);			/* spsr  IRQ, FIQ disable */    return ((void *)stk);}/*$PAGE*/#if OS_CPU_HOOKS_EN/***********************************************************************************************************                                          TASK CREATION HOOK** Description: This function is called when a task is created.** Arguments  : ptcb   is a pointer to the task control block of the task being created.** Note(s)    : 1) Interrupts are disabled during this call.**********************************************************************************************************/void OSTaskCreateHook (OS_TCB *ptcb){    ptcb = ptcb;                       /* Prevent compiler warning                                     */}/***********************************************************************************************************                                           TASK DELETION HOOK** Description: This function is called when a task is deleted.** Arguments  : ptcb   is a pointer to the task control block of the task being deleted.** Note(s)    : 1) Interrupts are disabled during this call.**********************************************************************************************************/void OSTaskDelHook (OS_TCB *ptcb){    ptcb = ptcb;                       /* Prevent compiler warning                                     */}/***********************************************************************************************************                                           TASK SWITCH HOOK** Description: This function is called when a task switch is performed.  This allows you to perform other*              operations during a context switch.** Arguments  : none** Note(s)    : 1) Interrupts are disabled during this call.*              2) It is assumed that the global pointer 'OSTCBHighRdy' points to the TCB of the task that*                 will be 'switched in' (i.e. the highest priority task) and, 'OSTCBCur' points to the *                 task being switched out (i.e. the preempted task).**********************************************************************************************************/void OSTaskSwHook (void){}/***********************************************************************************************************                                           STATISTIC TASK HOOK** Description: This function is called every second by uC/OS-II's statistics task.  This allows your *              application to add functionality to the statistics task.** Arguments  : none**********************************************************************************************************/void OSTaskStatHook (void){}/***********************************************************************************************************                                               TICK HOOK** Description: This function is called every tick.** Arguments  : none** Note(s)    : 1) Interrupts may or may not be ENABLED during this call.**********************************************************************************************************/void OSTimeTickHook (void){}#endif#define BUILD_DATE "Date: " __DATE__ "\n"/* * Initialize an ARM Target board */void ARMTargetInit(void){///////////////////////////////////////////////////////////////////add by Eric Rong// 		rSYSCFG=CACHECFG;	// Using 8KB Cache//		ChangePllValue(PLL_M,PLL_P,PLL_S);		Port_Init();//		Uart_Init(0,0,115200);		Uart_Init(0,0,115200);		Uart_Init(1,0,9600);#ifdef DEBUG		Uart_Printf("\nBegain to run uC/OS-II!\n");#endif//add end/////////////////////////////////////////////////////////////////	// Tell the world who we are //	Uart_Printf("\nuCOS-II Running on ") ;	#if		CPU_TYPE==S3C44B0X		Uart_Printf(" S3C44B0X\n") ;	#else		Uart_Printf(" unknown ARM CPU\n") ;	#endif	#ifdef DEBUG		Uart_Printf("Initialising target\n");	#endif	// disable the MMU //	uHALr_ResetMMU();	// disable interrupts (IRQs) //	ARMDisableInt();	// soft vectors /	#ifdef DEBUG		Uart_Printf("Setting up soft vectors\n");	#endif	// Define pre & post-process routines for Interrupt //	uHALir_DefineIRQ((void *)IrqStart, (void *)IrqFinish, (void *) 0);	uHALr_InitInterrupts();	#ifdef DEBUG		Uart_Printf("Timer init\n");	#endif	uHALr_InitTimers();	#ifdef DEBUG		Uart_Printf("targetInit() complete\n");	#endif}// targetInit //// start the ARM target running //void  ARMTargetStart(void){	#ifdef DEBUG		Uart_Printf("Starting target\n") ;	#endif	// request the system timer //	if (uHALr_RequestSystemTimer((void *) OSTimeTick,(const unsigned char *)"uCOS-II") <= 0)		Uart_Printf("Timer/IRQ busy\n");	// Start system timer & enable the interrupt. //	uHALr_InstallSystemTimer();}extern void IRQContextSwap(void);   // post DispatchIRQ processing (the _real_ one) //// just 'notice' that we need to change context //int need_to_swap_context = 0 ;void OSIntCtxSw(void){	need_to_swap_context = 1;}/* This is what uCOS does at the start of an IRQ */void IrqStart(void){    /* increment nesting counter */    OSIntNesting++;}/* This is what uCOS does at the end of an IRQ */void *IrqFinish(void){    OSIntExit() ;    if (need_to_swap_context) {//        need_to_swap_context = 0 ;        return ((void *)IRQContextSwap) ;    } else {        return (void *)0;    }}void *ExIrqFinish(void){    OSExIntExit() ;    if (need_to_swap_context) {//        need_to_swap_context = 0 ;        return ((void *)IRQContextSwap) ;    } else {        return (void *)0;    }}