int.s

nuclues plus 源代码程序

;/*************************************************************************/
;/*                                                                       */
;/*         Copyright (c) 1993-1994 Accelerated Technology, Inc.          */
;/*                                                                       */
;/* PROPRIETARY RIGHTS of Accelerated Technology are involved in the      */
;/* subject matter of this material.  All manufacturing, reproduction,    */
;/* use, and sales rights pertaining to this subject matter are governed  */
;/* by the license agreement.  The recipient of this software implicitly  */
;/* accepts the terms of the license.                                     */
;/*                                                                       */
;/*************************************************************************/
;
;/*************************************************************************/
;/*                                                                       */
;/* FILE NAME                                            VERSION          */
;/*                                                                       */
;/*      int.s                                       PLUS/68HC11/I 1.2    */
;/*                                                                       */
;/* COMPONENT                                                             */
;/*                                                                       */
;/*      IN - Initialization                                              */
;/*                                                                       */
;/* DESCRIPTION                                                           */
;/*                                                                       */
;/*      This file contains the target processor dependent initialization */
;/*      routines and data.                                               */
;/*                                                                       */
;/* AUTHOR                                                                */
;/*                                                                       */
;/*      William E. Lamie, Accelerated Technology, Inc.                   */
;/*                                                                       */
;/* DATA STRUCTURES                                                       */
;/*                                                                       */
;/*      INT_Vectors                         Interrupt vector table       */
;/*                                                                       */
;/* FUNCTIONS                                                             */
;/*                                                                       */
;/*      INT_Initialize                      Target initialization        */
;/*      INT_Vectors_Loaded                  Returns a NU_TRUE if all the */
;/*                                            default vectors are loaded */
;/*      INT_Setup_Vector                    Sets up an actual vector     */
;/*                                                                       */
;/* DEPENDENCIES                                                          */
;/*                                                                       */
;/*      nucleus.h                           System constants             */
;/*                                                                       */
;/* HISTORY                                                               */
;/*                                                                       */
;/*         NAME            DATE                    REMARKS               */
;/*                                                                       */
;/*      W. Lamie        06-01-1993      Created initial version 1.0      */
;/*      D. Lamie        06-01-1993      Verified version 1.0             */
;/*      W. Lamie        08-09-1993      Removed timer task setup and     */
;/*                                        modified timer HISR comment,   */
;/*                                        resulting in version 1.0a      */
;/*      D. Lamie        08-09-1993      Verified version 1.0a            */
;/*      K. Homer        03-01-1994      Changed copyright, resulting in  */
;/*                                        version 1.1                    */
;/*      D. Lamie        03-18-1994      Verified version 1.1             */
;/*      M. Trippi       06-12-1996      New NUCLEUS.H created version 1.2*/
;/*                                                                       */
;/*************************************************************************/
;#define         NU_SOURCE_FILE
;
;#include        "nucleus.h"                 /* System constants          */
;
;
;/* Define the global system stack variable.  This is setup by the 
;   initialization routine.  */
;
;extern VOID            *TCD_System_Stack;
;
        .external       _TCD_System_Stack
;
;
;/* Define the global data structures that need to be initialized by this
;   routine.  These structures are used to define the system timer management
;   HISR.  */
;   
;extern VOID     *TMD_HISR_Stack_Ptr;
;extern UNSIGNED  TMD_HISR_Stack_Size;
;extern INT       TMD_HISR_Priority;
;
        .external       _TMD_HISR_Priority
        .external       _TMD_HISR_Stack_Size
        .external       _TMD_HISR_Stack_Ptr
        .external       _INT_Vectors
;
;
;/* Define extern function references.  */
;
;VOID   INC_Initialize(VOID *first_available_memory);
;VOID   TCT_Interrupt_Context_Save(VOID);
;VOID   TCT_Interrupt_Context_Restore(VOID);
;VOID   TCC_Dispatch_LISR(INT vector_number);
;STATUS TCT_Activate_HISR(TC_HCB *hisr);
;VOID   TMT_Timer_Interrupt(void);
;
        .external       _INC_Initialize
        .external       _TCT_Interrupt_Context_Save
        .external       _TCT_Interrupt_Context_Restore
        .external       _TCC_Dispatch_LISR
        .external       _TCT_Activate_HISR
        .external       _TMT_Timer_Interrupt
        .external       __stext
;
;
        .psect  _bss
;/* Define the initialization flag that indicates whether or not all of the
;   default vectors have been loaded during initialization.  */
;
;INT    INT_Loaded_Flag;
;
        .public _INT_Loaded_Flag
_INT_Loaded_Flag:
        .byte   [2]
;
;
;/* Normally, the interrupt vector table is defined in INT.S.  However, the
;   tools do not provide a mechanism for creating new sections and therefore
;   the vector table must be in a separate file in order for it to be loaded
;   at the absolute address 0xFFD6.  See INT_Vectors.s for the vector table
;   description.  */
;
;
;/* Define equates for the timer HISR stack size and priority.  */
;
        .define HISRSIZE =      0200H
        .define HISRPRI =       0H
        .define VECTORS =       0FFD6H
;
;/* Define equates for access to 68HC11 peripherals.  */
;
        .define TMSK2 =         00024H
        .define TFLG2 =         00025H
        .define PACTL =         00026H
;
;/* Define values for the on-chip peripherals.  */
;
        .define TMSK2_VALUE =   040H        ; RTI Interrupt mode
        .define TFLG2_VALUE =   040H        ; Clear RTI interrupt flag
        .define PACTL_VALUE =   002H        ; Define 16ms RTI interrupt
                                            ;   for an 8MHz part
;
;
        .psect  _text
;/*************************************************************************/
;/*                                                                       */
;/* FUNCTION                                                              */
;/*                                                                       */
;/*      INT_Initialize                                                   */
;/*                                                                       */
;/* DESCRIPTION                                                           */
;/*                                                                       */
;/*      This function sets up the global system stack variable and       */
;/*      transfers control to the target independent initialization       */
;/*      function INC_Initialize.  Responsibilities of this function      */
;/*      include the following:                                           */
;/*                                                                       */
;/*             - Setup necessary processor/system control registers      */
;/*             - Initialize the vector table                             */
;/*             - Setup the system stack                                  */
;/*             - Setup the timer interrupt                               */
;/*             - Calculate the timer HISR stack and priority             */
;/*             - Calculate the first available memory address            */
;/*             - Transfer control to INC_Initialize to initialize all of */
;/*               the system components.                                  */
;/*                                                                       */
;/* AUTHOR                                                                */
;/*                                                                       */
;/*      William E. Lamie, Accelerated Technology, Inc.                   */
;/*                                                                       */
;/* CALLED BY                                                             */
;/*                                                                       */
;/*      startup code (__stext)                                           */
;/*                                                                       */
;/* CALLS                                                                 */
;/*                                                                       */
;/*      INC_Initialize                      Common initialization        */
;/*                                                                       */
;/* INPUTS                                                                */
;/*                                                                       */
;/*      None                                                             */
;/*                                                                       */
;/* OUTPUTS                                                               */
;/*                                                                       */
;/*      None                                                             */
;/*                                                                       */
;/* HISTORY                                                               */
;/*                                                                       */
;/*         NAME            DATE                    REMARKS               */
;/*                                                                       */
;/*      W. Lamie        06-01-1993      Created initial version 1.0      */
;/*      D. Lamie        06-01-1993      Verified version 1.0             */
;/*      W. Lamie        08-09-1993      Removed timer task setup and     */
;/*                                        modified timer HISR comment,   */
;/*                                        resulting in version 1.0a      */