/*
*********************************************************************************************************
*                                              uC/OS-III
*                                        The Real-Time Kernel
*
*                    Copyright 2009-2020 Silicon Laboratories Inc. www.silabs.com
*
*                                 SPDX-License-Identifier: APACHE-2.0
*
*               This software is subject to an open source license and is distributed by
*                Silicon Laboratories Inc. pursuant to the terms of the Apache License,
*                    Version 2.0 available at www.apache.org/licenses/LICENSE-2.0.
*
*********************************************************************************************************
*/

/*
*********************************************************************************************************
*
*                                         Renesas V850E2M Port
*
* File      : os_cpu_c.c
* Version   : V3.08.00
*********************************************************************************************************
* For       : Renesas V850E2M
* Toolchain : IAR EWV850 v3.7x and 3.8x
*********************************************************************************************************
*/

#define  OS_CPU_GLOBALS

#ifdef VSC_INCLUDE_SOURCE_FILE_NAMES
const  CPU_CHAR  *os_cpu_c__c = "$Id: $";
#endif

/*
*********************************************************************************************************
*                                           INCLUDE FILES
*********************************************************************************************************
*/

#include  "../os.h"


#ifdef __cplusplus
extern  "C" {
#endif


/*
*********************************************************************************************************
*                                          LOCAL CONSTANTS
*********************************************************************************************************
*/

#define  V850ES_EIPSW_EN                0x00000000u

/*
*********************************************************************************************************
*                                           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)    : None.
*********************************************************************************************************
*/

void  OSIdleTaskHook (void)
{
#if OS_CFG_APP_HOOKS_EN > 0u
    if (OS_AppIdleTaskHookPtr != (OS_APP_HOOK_VOID)0) {
        (*OS_AppIdleTaskHookPtr)();
    }
#endif
}

/*
*********************************************************************************************************
*                                       OS INITIALIZATION HOOK
*
* Description: This function is called by OSInit() at the beginning of OSInit().
*
* Arguments  : None.
*
* Note(s)    : None.
*********************************************************************************************************
*/

void  OSInitHook (void)
{
}

/*
*********************************************************************************************************
*                                         STATISTIC TASK HOOK
*
* Description: This function is called every second by uC/OS-III's statistics task.  This allows your
*              application to add functionality to the statistics task.
*
* Arguments  : None.
*
* Note(s)    : None.
*********************************************************************************************************
*/

void  OSStatTaskHook (void)
{
#if OS_CFG_APP_HOOKS_EN > 0u
    if (OS_AppStatTaskHookPtr != (OS_APP_HOOK_VOID)0) {
        (*OS_AppStatTaskHookPtr)();
    }
#endif
}

/*
*********************************************************************************************************
*                                          TASK CREATION HOOK
*
* Description: This function is called when a task is created.
*
* Arguments  : p_tcb        Pointer to the task control block of the task being created.
*
* Note(s)    : None.
*********************************************************************************************************
*/

void  OSTaskCreateHook (OS_TCB  *p_tcb)
{
#if OS_CFG_APP_HOOKS_EN > 0u
    if (OS_AppTaskCreateHookPtr != (OS_APP_HOOK_TCB)0) {
        (*OS_AppTaskCreateHookPtr)(p_tcb);
    }
#else
    (void)p_tcb;                                            /* Prevent compiler warning                               */
#endif
}

/*
*********************************************************************************************************
*                                           TASK DELETION HOOK
*
* Description: This function is called when a task is deleted.
*
* Arguments  : p_tcb        Pointer to the task control block of the task being deleted.
*
* Note(s)    : None.
*********************************************************************************************************
*/

void  OSTaskDelHook (OS_TCB  *p_tcb)
{
#if OS_CFG_APP_HOOKS_EN > 0u
    if (OS_AppTaskDelHookPtr != (OS_APP_HOOK_TCB)0) {
        (*OS_AppTaskDelHookPtr)(p_tcb);
    }
#else
    (void)p_tcb;                                            /* Prevent compiler warning                               */
#endif
}

/*
*********************************************************************************************************
*                                            TASK RETURN HOOK
*
* Description: This function is called if a task accidentally returns.  In other words, a task should
*              either be an infinite loop or delete itself when done.
*
* Arguments  : p_tcb        Pointer to the task control block of the task that is returning.
*
* Note(s)    : None.
*********************************************************************************************************
*/

void  OSTaskReturnHook (OS_TCB  *p_tcb)
{
#if OS_CFG_APP_HOOKS_EN > 0u
    if (OS_AppTaskReturnHookPtr != (OS_APP_HOOK_TCB)0) {
        (*OS_AppTaskReturnHookPtr)(p_tcb);
    }
#else
    (void)p_tcb;                                            /* Prevent compiler warning                               */
#endif
}

/*
**********************************************************************************************************
*                                       INITIALIZE A TASK'S STACK
*
* Description: This function is called by OS_Task_Create() or OSTaskCreateExt() to initialize the stack
*              frame of the task being created. This function is highly processor specific.
*
* Arguments  : p_task       Pointer to the task entry point address.
*
*              p_arg        Pointer to a user supplied data area that will be passed to the task
*                               when the task first executes.
*
*              p_stk_base   Pointer to the base address of the stack.
*
*              stk_size     Size of the stack, in number of CPU_STK elements.
*
*              opt          Options used to alter the behavior of OS_Task_StkInit().
*                            (see OS.H for OS_TASK_OPT_xxx).
*
* 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)    : 1) Interrupts are enabled when task starts executing.
**********************************************************************************************************
*/

CPU_STK  *OSTaskStkInit (OS_TASK_PTR    p_task,
                         void          *p_arg,
                         CPU_STK       *p_stk_base,
                         CPU_STK       *p_stk_limit,
                         CPU_STK_SIZE   stk_size,
                         OS_OPT         opt)
{
    CPU_STK  *p_stk;


    (void)opt;


    p_stk      = &p_stk_base[stk_size];      /* Load stack pointer.                                        */
    *(--p_stk) =(CPU_STK)V850ES_EIPSW_EN;    /* EIPSW interrupt enable                                     */
    *(--p_stk) =(CPU_STK)p_task;             /* EIPC                                                       */
    *(--p_stk) =(CPU_STK)OS_TaskReturn;      /* r31 Link Pointer (LP). to pass return address of function  */
    *(--p_stk) =(CPU_STK)0x29292929;         /* r29                                                        */
    *(--p_stk) =(CPU_STK)0x28282828;         /* r28                                                        */
    *(--p_stk) =(CPU_STK)0x27272727;         /* r27                                                        */
    *(--p_stk) =(CPU_STK)0x26262626;         /* r26                                                        */
    *(--p_stk) =(CPU_STK)0x24242424;         /* r24                                                        */
    *(--p_stk) =(CPU_STK)0x23232323;         /* r23                                                        */
    *(--p_stk) =(CPU_STK)0x22222222;         /* r22                                                        */
    *(--p_stk) =(CPU_STK)0x21212121;         /* r21                                                        */
    *(--p_stk) =(CPU_STK)0x20202020;         /* r20                                                        */
    *(--p_stk) =(CPU_STK)0x19191919;         /* r19                                                        */
    *(--p_stk) =(CPU_STK)0x18181818;         /* r18                                                        */
    *(--p_stk) =(CPU_STK)0x17171717;         /* r17                                                        */
    *(--p_stk) =(CPU_STK)0x16161616;         /* r16                                                        */
    *(--p_stk) =(CPU_STK)0x15151515;         /* r15                                                        */
    *(--p_stk) =(CPU_STK)0x14141414;         /* r14                                                        */
    *(--p_stk) =(CPU_STK)0x13131313;         /* r13                                                        */
    *(--p_stk) =(CPU_STK)0x12121212;         /* r12                                                        */
    *(--p_stk) =(CPU_STK)0x11111111;         /* r11                                                        */
    *(--p_stk) =(CPU_STK)0x10101010;         /* r10                                                        */
    *(--p_stk) =(CPU_STK)0x09090909;         /* r9                                                         */
    *(--p_stk) =(CPU_STK)0x08080808;         /* r8                                                         */
    *(--p_stk) =(CPU_STK)0x07070707;         /* r7                                                         */
    *(--p_stk) =(CPU_STK)0x06060606;         /* r6                                                         */
    *(--p_stk) =(CPU_STK)0x05050505;         /* r5                                                         */
    *(--p_stk) =(CPU_STK)0x02020202;         /* r2                                                         */
    *(--p_stk) =(CPU_STK)p_arg;              /* r1  Argument register/ return value                       */

    return (p_stk);
}

/*
*********************************************************************************************************
*                                           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 'OSTCBHighRdyPtr' points to the TCB of the task
*                 that will be 'switched in' (i.e. the highest priority task) and, 'OSTCBCurPtr' points
*                 to the task being switched out (i.e. the preempted task).
*********************************************************************************************************
*/

void  OSTaskSwHook (void)
{
#if OS_CFG_TASK_PROFILE_EN > 0u
    CPU_TS  ts;
#endif
#ifdef  CPU_CFG_INT_DIS_MEAS_EN
    CPU_TS  int_dis_time;
#endif



#if OS_CFG_APP_HOOKS_EN > 0u
    if (OS_AppTaskSwHookPtr != (OS_APP_HOOK_VOID)0) {
        (*OS_AppTaskSwHookPtr)();
    }
#endif

#if OS_CFG_TASK_PROFILE_EN > 0u
    ts = OS_TS_GET();
    if (OSTCBCurPtr != OSTCBHighRdyPtr) {
        OSTCBCurPtr->CyclesDelta  = ts - OSTCBCurPtr->CyclesStart;
        OSTCBCurPtr->CyclesTotal += (OS_CYCLES)OSTCBCurPtr->CyclesDelta;
    }

    OSTCBHighRdyPtr->CyclesStart = ts;
#endif

#ifdef  CPU_CFG_INT_DIS_MEAS_EN
    int_dis_time = CPU_IntDisMeasMaxCurReset();             /* Keep track of per-task interrupt disable time          */
    if (OSTCBCurPtr->IntDisTimeMax < int_dis_time) {
        OSTCBCurPtr->IntDisTimeMax = int_dis_time;
    }
#endif

#if OS_CFG_SCHED_LOCK_TIME_MEAS_EN > 0u
                                                            /* Keep track of per-task scheduler lock time             */
    if (OSTCBCurPtr->SchedLockTimeMax < OSSchedLockTimeMaxCur) {
        OSTCBCurPtr->SchedLockTimeMax = OSSchedLockTimeMaxCur;
    }
    OSSchedLockTimeMaxCur = (CPU_TS)0;                      /* Reset the per-task value                               */
#endif
}

/*
*********************************************************************************************************
*                                              TICK HOOK
*
* Description: This function is called every tick.
*
* Arguments  : None.
*
* Note(s)    : 1) This function is assumed to be called from the Tick ISR.
*********************************************************************************************************
*/

void  OSTimeTickHook (void)
{
#if OS_CFG_APP_HOOKS_EN > 0u
    if (OS_AppTimeTickHookPtr != (OS_APP_HOOK_VOID)0) {
        (*OS_AppTimeTickHookPtr)();
    }
#endif
}


#ifdef __cplusplus
}
#endif
