/*****************************************************************************************************
**文   件   名: os_cpu_c.c
**描        述: μCOS-II在lpc210x上的移植代碼C語言部分，包括任務堆棧初始化代碼和鉤子函數等
**              用ads1.2編譯，必須使用ARM方式編譯
**              增加軟中斷服務函數
**              提高SWI異常服務的效率
********************************************************************************************************/
#define  OS_CPU_GLOBALS
#include "app_cfg.h"

#if OS_SELF_EN == 0 
int const _OSFunctionAddr[1]  = {0};
int const _UsrFunctionAddr[1] = {0};
#endif

/*********************************************************************************************************
** 函數名稱: OSTaskStkInit
** 功能描述: 任務堆棧初始化代碼，本函數調用失敗會使系統崩潰
** 輸  　入: task  : 任務開始執行的地址
**           pdata : 傳遞給任務的參數
**           ptos  : 任務的堆棧開始位置
**           opt   : 附加參數，當前版本對于本函數無用，具體意義參見OSTaskCreateExt()的opt參數
** 輸  　出: 棧頂指針位置
** 全局變量:
** 調用模塊: 
********************************************************************************************************/
OS_STK *OSTaskStkInit (void (*task)(void *pd), void *pdata, OS_STK *ptos, INT16U opt)
{
    OS_STK *stk;

    opt    = opt;                           /* opt沒有使用。作用是避免編譯器警告 */
    stk    = ptos;                          /* 獲取堆棧指針 */

                                            /* 建立任務環境，ADS1.2使用滿遞減堆棧 */
    *stk = (OS_STK) task;                   /*  pc  */
    *--stk = (OS_STK) 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,第一個參數使用R0傳遞   */
    *--stk = (USER_USING_MODE|0x00);	    /*  spsr，允許 IRQ, FIQ 中斷  */
    *--stk = 0;                             /*  關中斷計數器OsEnterSum;   */

    return (stk);
}

/*********************************************************************************************************
** 函數名稱: OSStartHighRdy
** 功能描述: uC/OS-II啟動時使用OSStartHighRdy運行第一個任務,
**           實質是產生swi 1指令
** 輸 　 入: 無
** 輸　  出: 無
** 全局變量: 無
** 調用模塊: 無
********************************************************************************************************/
void OSStartHighRdy(void)
{
    _OSStartHighRdy();
}

/*********************************************************************************************************
** 函數名稱: _TaskIsARM
** 功能描述: 任務代碼是ARM代碼
** 輸　  入: 無
** 輸 　 出: 無
** 全局變量: 無
** 調用模塊: 無
********************************************************************************************************/
void _TaskIsARM(INT8U prio)
{
    OS_TCB   *ptcb;
    if (prio <= OS_LOWEST_PRIO)
    {
        ptcb = OSTCBPrioTbl[prio];
        if (ptcb != NULL)
        {
            ptcb -> OSTCBStkPtr[1] &= ~(1 << 5);
        }
    }
}

/*********************************************************************************************************
** 函數名稱: _TaskIsTHUMB
** 功能描述: 任務是THUMB代碼
** 輸  　入: 無
** 輸  　出: 無
** 全局變量: 無
** 調用模塊: 無
********************************************************************************************************/
void _TaskIsTHUMB(INT8U prio)
{
    OS_TCB   *ptcb;
    if (prio <= OS_LOWEST_PRIO)
    {
        ptcb = OSTCBPrioTbl[prio];
        if (ptcb != NULL)
        {
            ptcb -> OSTCBStkPtr[1] |= (1 << 5);
        }
    }
}

/* 以下為一些鉤子函數，全部為空函數。具體說明請看相關資料 */
#if OS_CPU_HOOKS_EN
/********************************************************************************************************
*                                       OS INITIALIZATION HOOK
*                                            (BEGINNING)
*
* Description: This function is called by OSInit() at the beginning of OSInit().
* Arguments  : none
* Note(s)    : 1) Interrupts should be disabled during this call.
********************************************************************************************************/
#if OS_VERSION > 203
void OSInitHookBegin (void)
{
}
#endif

/********************************************************************************************************
*                                       OS INITIALIZATION HOOK
*                                               (END)
*
* Description: This function is called by OSInit() at the end of OSInit().
* Arguments  : none
* Note(s)    : 1) Interrupts should be disabled during this call.
********************************************************************************************************/
#if OS_VERSION > 203
void OSInitHookEnd (void)
{
}
#endif

/*********************************************************************************************************
*                                          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)
{
}

/*********************************************************************************************************
*                                           OSTCBInit() HOOK
*
* Description: This function is called by OSTCBInit() after setting up most of the TCB.
* Arguments  : ptcb    is a pointer to the TCB of the task being created.
* Note(s)    : 1) Interrupts may or may not be ENABLED during this call.
*********************************************************************************************************/
#if OS_VERSION > 203
void OSTCBInitHook (OS_TCB *ptcb)
{
    ptcb = ptcb;                                           /* Prevent Compiler warning                 */
}
#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)
{
}


/*********************************************************************************************************
*                                             IDLE TASK HOOK
*
* Description: This function is called by the idle task.  This hook has been added to allow you to do  
*              such things as STOP the CPU to conserve power.
* Arguments  : none
* Note(s)    : 1) Interrupts are enabled during this call.
*********************************************************************************************************/
#if OS_VERSION >= 251
void OSTaskIdleHook (void)
{
}
#endif

#endif  //#if OS_CPU_HOOKS_EN