os_cpu_c.c

自已写的lwip+ucos程序已调通

/*
*********************************************************************************************************
*                                               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_C.C
*********************************************************************************************************
*/

#define  OS_CPU_GLOBALS
#include "../includes.h"
#include "../arm44box/44b.h"
#include "../arm44box/8led.h"
extern void ne2k_isr(void);
extern void qhyne2k(void);
/*
*********************************************************************************************************
*                                        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!
*********************************************************************************************************
*/

OS_STK * OSTaskStkInit (void (*task)(void *pd), void *pdata, OS_STK *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)
{
}











void OSInitHookBegin (void)
{
	//printf ( "OSInitHookBegin \n" );
}


void OSInitHookEnd (void)
{
	//printf ( "OSInitHookEnd \n" );
}


void OSTaskIdleHook (void)
{
	/*static int counter = 0;
	int i, j;
	if ( counter++ > 100 )
	{
		for( i = 0; i < 65536; i++ )
			for ( j = 0; j < 65536; j++ )
					counter = 0;
	}*/	
}



void OSTCBInitHook (OS_TCB *ptcb)
{
#if 0
    ptcb = ptcb;                                           /* Prevent Compiler warning  */  
  
    {              /* Go through all TCBs in TCB list          */
  		printf( "\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ \n " );
    	printf( "ptcb->OSTCBPrio = %d   ", ptcb->OSTCBPrio );
		printf("ptcb->OSTCBStkPtr = %p ",ptcb->OSTCBStkPtr);
		printf( "ptcb->OSTCBDly = %d    ", ptcb->OSTCBDly );
        ptcb = ptcb->OSTCBNext;                                /* Point at next TCB in TCB list        */
   		printf( "\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ \n " );
    }
#endif          
}






















/*
*********************************************************************************************************
*                                               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 "Build Date: " __DATE__ "\n"

/*
 * Initialize an ARM Target board
 */
void  ARMTargetInit(void)
{
      Port_Init();
	rI_ISPC = 0xffffffff;	
    /* ---- Tell the world who we are ---------------------------------- */
  //  uHALr_printf("\n\r            齐焕云uCOS-II Running\n") ;
    //uHALr_printf("*==================================*\n"); 
   // uHALr_printf("*= 湖北华卫戍部队智取能工程有限公司  =*\n"); 
    //uHALr_printf("*==================================*\n"); 
    uHALr_printf("*========== 产品研发中心 ======================*\n"); 
    uHALr_printf("*=======  027-87497831-8816  ========*\n"); 
    uHALr_printf("*===========[e-mail] ======*\n"); 
    uHALr_printf("*=====     Version 2.0 2006       ===*\n"); 
    /* ---- disable the MMU        ------------------------------------- */
    uHALr_ResetMMU();

    /* ---- disable interrupts (IRQs) --------------------------------- */
    ARMDisableInt();

    /* ---- soft vectors ---------------------------------------------- */
    /* Define pre & post-process routines for Interrupt */
    uHALir_DefineIRQ((void *)IrqStart, (void *)IrqFinish, (void *) 0);
    uHALr_InitInterrupts();


#ifdef DEBUG
    uHALr_printf("Timer init\n");
#endif
    uHALr_InitTimers();

#ifdef DEBUG
    uHALr_printf("targetInit() complete\n");
#endif
}                               /* targetInit */

/* start the ARM target running */
void  ARMTargetStart(void)
{
#ifdef DEBUG
    uHALr_printf("Starting target\n") ;
#endif

    /* request the system timer */
    if (uHALr_RequestSystemTimer(
                                 (void *) OSTimeTick,
                                 (const unsigned char *)"uCOS-II") <= 0)
        uHALr_printf("Timer/IRQ busy\n");

    /* Start system timer & enable the interrupt. */
    qhyne2k();
    uHALr_InstallSystemTimer();
     
    rI_ISPC    = BIT_EINT3;
    SysENInterrupt(BIT_TIMER0|BIT_EINT3);
}

extern void IRQContextSwap(void);   /* post DispatchIRQ processing (the _real_ one) */

/* just 'notice' that we need to change context [called in OSIntExit]*/
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 UserIRQ0(void)
{
	
      //SysDISInterrupt(BIT_GLOBAL);    // avoid interrupt nesting
       rI_ISPC    = BIT_EINT3;		//clear pending_bit
     //  rEXTINTPND = 0xf;				//clear EXTINTPND reg.
        OSIntEnter();
	
//	LED8ADDR =0xff;
	uHALr_printf("*=======   QHH isne2k_isr  ========*\n"); 
//qhyne2k();
	
	ne2k_isr();
	//SysENInterrupt(BIT_GLOBAL);
	rINTMSK=~( BIT_TIMER0 | BIT_GLOBAL | BIT_EINT3);
	rI_ISPC    = BIT_EINT3;
	OSIntExit() ;
	
}