text: /*
  *********************************************************************************************************
  *                                              uC/OS-II
  *                                        The Real-Time Kernel
  *
  *                    Copyright 1992-2020 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 SH-2A-FPU Specific code
  *                           Renesas SH SERIES C/C++ Compiler (V.9.00.03.006)
  *
  * Filename : os_cpu_c.c
  * Version  : V2.93.00
  *********************************************************************************************************
  */
  
  #define  OS_CPU_GLOBALS
  #include <ucos_ii.h>
  
  /*
  *********************************************************************************************************
  *                                            GLOBAL DATA
  *********************************************************************************************************
  */
                                                                          /* The OS must not mask the interrupts required by ROM ...  */
                                                                          /* ... monitor type debugger, e.g. HMON                     */
  #define INT_MASK_ON  0x00000000L
  #define INT_MASK_OFF 0x000000F0L
  
  
  /*
  *********************************************************************************************************
  *                                          LOCAL VARIABLES
  *********************************************************************************************************
  */
  
  #if (OS_VERSION >= 281) && (OS_TMR_EN > 0)
  static  INT16U  OSTmrCtr;
  #endif
  
  /*
  *********************************************************************************************************
  *                                       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_CPU_HOOKS_EN > 0 && OS_VERSION > 203
  void  OSInitHookBegin (void)
  {
  #if (OS_VERSION >= 281) && (OS_TMR_EN > 0)
      OSTmrCtr = 0;
  #endif
  }
  #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_CPU_HOOKS_EN > 0 && 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.
  *********************************************************************************************************
  */
  
  #if OS_CPU_HOOKS_EN > 0
  void  OSTaskCreateHook (OS_TCB *ptcb)
  {
  #if OS_APP_HOOKS_EN > 0
      App_TaskCreateHook(ptcb);
  #else
      (void)ptcb;                                                         /* Prevent compiler warning                                 */
  #endif
  }
  #endif
  
  
  /*
  *********************************************************************************************************
  *                                           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.
  *********************************************************************************************************
  */
  #if OS_CPU_HOOKS_EN > 0
  void  OSTaskDelHook (OS_TCB *ptcb)
  {
  #if OS_APP_HOOKS_EN > 0
      App_TaskDelHook(ptcb);
  #else
      (void)ptcb;                                                         /* Prevent compiler warning                                 */
  #endif
  }
  #endif
  
  /*
  *********************************************************************************************************
  *                                             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_CPU_HOOKS_EN > 0 && OS_VERSION >= 251
  void  OSTaskIdleHook (void)
  {
  #if OS_APP_HOOKS_EN > 0
      App_TaskIdleHook();
  #endif
  }
  #endif
  
  /*
  *********************************************************************************************************
  *                                           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
  *********************************************************************************************************
  */
  
  #if OS_CPU_HOOKS_EN > 0
  void  OSTaskStatHook (void)
  {
  #if OS_APP_HOOKS_EN > 0
      App_TaskStatHook();
  #endif
  }
  #endif
  
  
  /*
  *********************************************************************************************************
  *                                        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().
  *
  *
  * 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.
  *
  *********************************************************************************************************
  */
  
  OS_STK *OSTaskStkInit (void (*task)(void *pd), void *pdata, OS_STK *ptos, INT16U opt)
  {
      INT32U *stk;
  
      opt    = opt;                               /* prevent compiler warning     */
      stk    = (INT32U *)ptos;                    /* load stack pointer           */
      *--stk = (INT32U) INT_MASK_ON;              /* SR                           */
      *--stk = (INT32U) task;                     /* PC of task                   */
      *--stk = 0xA0L;                             /* macl                         */
      *--stk = 0xA1L;                             /* mach                         */
      *--stk = 0xA2L;                             /* gbr                          */
      *--stk = 0xA3L;                             /* pr                           */
      *--stk = 14L;                               /* r14                          */
      *--stk = 13L;                               /* r13                          */
      *--stk = 12L;                               /* r12                          */
      *--stk = 11L;                               /* r11                          */
      *--stk = 10L;                               /* r10                          */
      *--stk = 9L;                                /* r9                           */
      *--stk = 8L;                                /* r8                           */
      *--stk = 7L;                                /* r7                           */
      *--stk = 6L;                                /* r6                           */
      *--stk = 5L;                                /* r5                           */
      *--stk = (INT32U) pdata;                    /* pass pdata in r4             */
      *--stk = 3L;                                /* r3                           */
      *--stk = 2L;                                /* r2                           */
      *--stk = 1L;                                /* r1                           */
      *--stk = 0L;                                /* r0                           */
      *--stk = 0xFL;                              /* FPUL                         */
      *--stk = 0xFL;                              /* FPSCR                        */
      *--stk = 0xF15L;                            /* FR15                         */
      *--stk = 0xF14L;                            /* FR14                         */
      *--stk = 0xF13L;                            /* FR13                         */
      *--stk = 0xF12L;                            /* FR12                         */
      *--stk = 0xF11L;                            /* FR11                         */
      *--stk = 0xF10L;                            /* FR10                         */
      *--stk = 0xF9L;                             /* FR9                          */
      *--stk = 0xF8L;                             /* FR8                          */
      *--stk = 0xF7L;                             /* FR7                          */
      *--stk = 0xF6L;                             /* FR6                          */
      *--stk = 0xF5L;                             /* FR5                          */
      *--stk = 0xF4L;                             /* FR4                          */
      *--stk = 0xF3L;                             /* FR3                          */
      *--stk = 0xF2L;                             /* FR2                          */
      *--stk = 0xF1L;                             /* FR1                          */
      *--stk = 0xF0L;                             /* FR0                          */
  
      return ((OS_STK *)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 '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).
  *********************************************************************************************************
  */
  
  #if (OS_CPU_HOOKS_EN > 0) && (OS_TASK_SW_HOOK_EN > 0)
  void  OSTaskSwHook (void)
  {
  #if OS_APP_HOOKS_EN > 0
      App_TaskSwHook();
  #endif
  }
  #endif
  
  /*
  *********************************************************************************************************
  *                                           OS_TCBInit() HOOK
  *
  * Description: This function is called by OS_TCBInit() 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_CPU_HOOKS_EN > 0 && OS_VERSION > 203
  void  OSTCBInitHook (OS_TCB *ptcb)
  {
  #if OS_APP_HOOKS_EN > 0
      App_TCBInitHook(ptcb);
  #else
      (void)ptcb;                                                         /* Prevent compiler warning                                 */
  #endif
  }
  #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.
  *********************************************************************************************************
  */
  
  #if (OS_CPU_HOOKS_EN > 0) && (OS_TIME_TICK_HOOK_EN > 0)
  void  OSTimeTickHook (void)
  {
  #if OS_APP_HOOKS_EN > 0
      App_TimeTickHook();
  #endif
  
  #if (OS_VERSION >= 281) && (OS_TMR_EN > 0)
      OSTmrCtr++;
      if (OSTmrCtr >= (OS_TICKS_PER_SEC / OS_TMR_CFG_TICKS_PER_SEC)) {
          OSTmrCtr = 0;
          OSTmrSignal();
      }
  #endif
  
  }
  #endif
  