?? tmi.c
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/*************************************************************************/
/* */
/* Copyright Mentor Graphics Corporation 2002 */
/* All Rights Reserved. */
/* */
/* THIS WORK CONTAINS TRADE SECRET AND PROPRIETARY INFORMATION WHICH IS */
/* THE PROPERTY OF MENTOR GRAPHICS CORPORATION OR ITS LICENSORS AND IS */
/* SUBJECT TO LICENSE TERMS. */
/* */
/*************************************************************************/
/*************************************************************************/
/* */
/* FILE NAME VERSION */
/* */
/* tmi.c Nucleus PLUS 1.14 */
/* */
/* COMPONENT */
/* */
/* TM - Timer Management */
/* */
/* DESCRIPTION */
/* */
/* This file contains the initialization routine for the timer */
/* management component. */
/* */
/* DATA STRUCTURES */
/* */
/* None */
/* */
/* FUNCTIONS */
/* */
/* TMI_Initialize Timer Management Initialize */
/* */
/* DEPENDENCIES */
/* */
/* tc_extr.h Task function interfaces */
/* er_extr.h Error handling function */
/* tm_defs.h Timer component constants */
/* */
/* HISTORY */
/* */
/* DATE REMARKS */
/* */
/* 03-01-1993 Created initial version 1.0 */
/* 04-19-1993 Verified version 1.0 */
/* 08-09-1993 Removed timer task creation, */
/* cleared the ID of the HISR */
/* control block, and casted the */
/* HISR priority, resulting in */
/* version 1.0a */
/* 08-09-1993 Verified version 1.0a */
/* 03-01-1994 Changed names of HISR create */
/* function, removed reference to */
/* timer list protect since it */
/* was deleted, resulting in */
/* version 1.1 */
/* */
/* 03-18-1994 Verified version 1.1 */
/* 04-17-1996 updated to version 1.2 */
/* 03-24-1998 Released version 1.3 */
/* 03-26-1999 Released 1.11m (new release */
/* numbering scheme) */
/* 04-17-2002 Released version 1.13m */
/* 11-07-2002 Released version 1.14 */
/*************************************************************************/
#define NU_SOURCE_FILE
#include "tc_extr.h" /* Task control functions */
#include "er_extr.h" /* Error handling function */
#include "tm_defs.h" /* Timer constants */
#include "tm_extr.h" /* Timer interfaces */
/* Define external inner-component global data references. */
extern CS_NODE *TMD_Created_Timers_List;
extern UNSIGNED TMD_Total_Timers;
extern TM_TCB *TMD_Active_Timers_List;
extern INT TMD_Active_List_Busy;
extern TC_PROTECT TMD_Created_List_Protect;
extern UNSIGNED TMD_System_Clock;
extern UNSIGNED TMD_Timer;
extern INT TMD_Timer_State;
extern UNSIGNED TMD_Time_Slice;
extern TC_TCB *TMD_Time_Slice_Task;
extern INT TMD_Time_Slice_State;
extern TC_HCB TMD_HISR;
extern VOID *TMD_HISR_Stack_Ptr;
extern UNSIGNED TMD_HISR_Stack_Size;
extern INT TMD_HISR_Priority;
/* Define inner-component function prototypes. */
VOID TMC_Timer_HISR(VOID);
/*************************************************************************/
/* */
/* FUNCTION */
/* */
/* TMI_Initialize */
/* */
/* DESCRIPTION */
/* */
/* This function initializes the data structures that control the */
/* operation of the timer component (TM). There are no application */
/* timers created initially. This routine must be called from */
/* Supervisor mode in Supervisor/User mode switching kernels. */
/* */
/* CALLED BY */
/* */
/* INC_Initialize System initialization */
/* */
/* CALLS */
/* */
/* ERC_System_Error System error handing function*/
/* TCC_Create_HISR Create timer HISR */
/* TCCE_Create_HISR Create timer HISR (error chk)*/
/* */
/* INPUTS */
/* */
/* (Indirect) */
/* TMD_HISR_Stack_Ptr Pointer to HISR stack area */
/* TMD_HISR_Stack_Size Size of HISR stack */
/* TMD_HISR_Priority Priority of timer HISR */
/* */
/* OUTPUTS */
/* */
/* TMD_Created_Timers_List Pointer to the linked-list */
/* of created application */
/* timers */
/* TMD_Total_Timers Total number of created */
/* application timers */
/* TMD_Active_Timers_List Pointer to the linked-list */
/* of active timers. */
/* TMD_Active_List_Busy Flag indicating that the */
/* active timer list is in use*/
/* TMD_Created_List_Protect Created timer list protect */
/* structure */
/* TMD_System_Clock System clock */
/* TMD_Timer Timer count-down value */
/* TMD_Timer_State State of timer */
/* TMD_Time_Slice Time slice count-down value */
/* TMD_Time_Slice_Task Pointer to task to time-slice*/
/* TMD_Time_Slice_State State of time slice */
/* TMD_HISR Timer HISR control block */
/* */
/* HISTORY */
/* */
/* DATE REMARKS */
/* */
/* 03-01-1993 Created initial version 1.0 */
/* 04-19-1993 Verified version 1.0 */
/* 08-09-1993 Removed timer task creation, */
/* cleared the ID of the HISR */
/* control block, and casted the */
/* HISR priority, resulting in */
/* version 1.0a */
/* 08-09-1993 Verified version 1.0a */
/* 03-01-1994 Modified HISR create function */
/* interface, removed reference */
/* to timer list protect since it */
/* was deleted, resulting in */
/* version 1.1 */
/* */
/* 03-18-1994 Verified version 1.1 */
/* */
/*************************************************************************/
VOID TMI_Initialize(VOID)
{
STATUS status; /* Return status of creates */
/* Initialize the created application timer's list to NU_NULL. */
TMD_Created_Timers_List = NU_NULL;
/* Initialize the total number of created application timers to 0. */
TMD_Total_Timers = 0;
/* Initialize the active timer's list to NU_NULL. */
TMD_Active_Timers_List = NU_NULL;
/* Clear the active timer list busy flag. */
TMD_Active_List_Busy = NU_FALSE;
/* Initialize the system clock to 0. */
TMD_System_Clock = 0;
/* Initialize the timer to 0 and the timer state to "not active." */
TMD_Timer = 0;
TMD_Timer_State = TM_NOT_ACTIVE;
/* Initialize the time-slice timer, task pointer, and the associated
state variable. */
TMD_Time_Slice = 0;
TMD_Time_Slice_Task = NU_NULL;
TMD_Time_Slice_State = TM_NOT_ACTIVE;
/* Initialize the list protection structures. */
TMD_Created_List_Protect.tc_tcb_pointer = NU_NULL;
/* Clear out the timer HISR control block. */
TMD_HISR.tc_id = 0;
/* Create the timer HISR. The timer HISR is responsible for performing
the time slice function and activating the timer task if necessary. */
#ifdef NU_NO_ERROR_CHECKING
status = TCC_Create_HISR((NU_HISR *) &TMD_HISR, "SYSTEM H",
TMC_Timer_HISR, (OPTION) TMD_HISR_Priority,
TMD_HISR_Stack_Ptr, TMD_HISR_Stack_Size);
#else
status = TCCE_Create_HISR((NU_HISR *) &TMD_HISR, "SYSTEM H",
TMC_Timer_HISR, (OPTION) TMD_HISR_Priority,
TMD_HISR_Stack_Ptr, TMD_HISR_Stack_Size);
#endif
/* Check for a system error creating the timer HISR. */
if (status != NU_SUCCESS)
/* Call the system error handler. */
ERC_System_Error(NU_ERROR_CREATING_TIMER_HISR);
}
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