os_cpu_c.c

移植的ucos

/*
*********************************************************************************************************
*                                                uC/OS-II
*                                          The Real-Time Kernel
*                                     ATMEL  AVR32 UC3 Specific code
*
*                                 (c) Copyright 2007; Micrium; Weston, FL
*                                           All Rights Reserved
*
* File    : OS_CPU_C.C
* By      : Fabiano Kovalski
*
* LICENSING TERMS:
* ---------------
*   uC/OS-II is provided in source form for FREE evaluation, for educational use or for peaceful research.
* If you plan on using  uC/OS-II  in a commercial product you need to contact Micri祄 to properly  license
* its use in your product.  We provide ALL the source code for your convenience and to help you experience
* uC/OS-II.   The fact that the  source  is provided does  NOT  mean that you can use it without  paying a
* licensing fee.
*********************************************************************************************************
*/

#define   OS_CPU_GLOBALS
#include  <ucos_ii.h>


/*
*********************************************************************************************************
*                                          LOCAL VARIABLES
*********************************************************************************************************
*/

#if      (OS_VERSION >= 281) && (OS_TMR_EN > 0)
  static  INT16U  OSTmrCtr;
#endif                                                                  /* #if (OS_VERSION >= 281) && (OS_TMR_EN > 0)               */

/*
**************************************************************************************************************
*                                         STATUS REGISTER MASKS
**************************************************************************************************************
*/

#define  OS_CPU_SR_M0_MASK              0x00400000                      /* Status Register, Supervisor Execution Mode Mask          */

/*
*********************************************************************************************************
*                                       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

/*$PAGE*/
/*
*********************************************************************************************************
*                                          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

/*$PAGE*/
/*
**********************************************************************************************************
*                                       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
*
*              p_arg         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 the
*                            highest valid address on 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)    : 1) Avoid AVR32Studio warning "Target request failed: cannot access memory at address #" at debug mode.
*