systimer.s

嵌入式操作系统VxWorks中板级支持包文件

/* sysTimer.s - template low level system timer support for sysTimer.c */

/* Copyright 2002 Wind River Systems, Inc. */

/*
TODO -  Remove the template modification history and begin a new history
        starting with version 01a and growing the history upward with
        each revision.

modification history
--------------------
01a,21may02,scm  written.
*/

/*
DESCRIPTION
This module contains low level system timer support routines written in assembly
language for sysTimer.c.
*/

#define _ASMLANGUAGE

#include "vxWorks.h"
#include "regs.h"
#include "arch/arm/arm.h"
#include "arch/arm/mmuArmLib.h"
#include "arch/arm/excArmLib.h"
#include "sysLib.h"
#include "config.h"

        .data
        .globl   VAR(copyright_wind_river)
        .long    VAR(copyright_wind_river)

/*
 * TODO - add low level system timer support routines
 * for the timer controller.
 */

        /* internals */

        /* Read/Write Timer Mode Registers */
        .globl  FUNC(sysRead_TMR0)
        .globl  FUNC(sysRead_TMR1)

        .globl  FUNC(sysWrite_TMR0)
        .globl  FUNC(sysWrite_TMR1)

        /* Enable/Disable Timer */
        .globl  FUNC(sysEnable_TMR0)
        .globl  FUNC(sysEnable_TMR1)

        .globl  FUNC(sysDisable_TMR0)
        .globl  FUNC(sysDisable_TMR1)

        /* Enable/Disable Timer Auto Reload */
        .globl  FUNC(sysEnable_Reload_TMR0)
        .globl  FUNC(sysEnable_Reload_TMR1)

        .globl  FUNC(sysDisable_Reload_TMR0)
        .globl  FUNC(sysDisable_Reload_TMR1)

        /* Enable/Disable Timer Privileged Write Control for User Mode */
        .globl  FUNC(sysEnable_PU_Mode_TMR0)
        .globl  FUNC(sysEnable_PU_Mode_TMR1)

        .globl  FUNC(sysDisable_U_Mode_TMR0)
        .globl  FUNC(sysDisable_U_Mode_TMR1)

        /* Read Timer Terminal Count Status */
        .globl  FUNC(sysRead_TCS_TMR0)
        .globl  FUNC(sysRead_TCS_TMR1)

        /* Read/Write Timer Input Clock Select */
        .globl  FUNC(sysRead_CSel_TMR0)
        .globl  FUNC(sysRead_CSel_TMR1)

        .globl  FUNC(sysWrite_CSel_TMR0)
        .globl  FUNC(sysWrite_CSel_TMR1)

        /* Read/Write Timer Count Registers */
        .globl  FUNC(sysRead_TCR0)
        .globl  FUNC(sysRead_TCR1)

        .globl  FUNC(sysWrite_TCR0)
        .globl  FUNC(sysWrite_TCR1)

        /* Read/Write Timer Reload Registers */
        .globl  FUNC(sysRead_TRR0)
        .globl  FUNC(sysRead_TRR1)

        .globl  FUNC(sysWrite_TRR0)
        .globl  FUNC(sysWrite_TRR1)

        /* Read/Clear Timer Interrupt Status Registers */
        .globl  FUNC(sysRead_TISR0)
        .globl  FUNC(sysRead_TISR1)

        .globl  FUNC(sysClear_TISR0)
        .globl  FUNC(sysClear_TISR1)

        /* Enable/Read Watch Dog Timer */
        .globl  FUNC(sysEnable_WDTCR)
        .globl  FUNC(sysRead_WDTCR)

	.text
	.align 4

/*****************************************************************************
* sysRead_TMR0 - Read Timer 0 Mode Register.
*
* RETURNS:       UINT32 containing the current TMR0 settings.
*/

_ARM_FUNCTION_CALLED_FROM_C(sysRead_TMR0)

        /* Read Timer 0 Mode Register */
        /* clear reserved bits        */
        mov     pc, lr

/*****************************************************************************
* sysRead_TMR1 - Read Timer 1 Mode Register.
*
* RETURNS:       UINT32 containing the current TMR1 settings.
*/

_ARM_FUNCTION_CALLED_FROM_C(sysRead_TMR1)

        /* Read Timer 1 Mode Register */
        /* clear reserved bits        */
        mov     pc, lr

/*****************************************************************************
* sysWrite_TMR0 - Write Timer 0 Mode Register.
*
* R0:            UINT32 containing the current TMR0 settings.
*
* RETURNS:                                                   
*/

_ARM_FUNCTION_CALLED_FROM_C(sysWrite_TMR0)

        /* Write Timer 0 Mode Register */
        mov     pc, lr

/*****************************************************************************
* sysWrite_TMR1 - Write Timer 1 Mode Register.
*
* R0:            UINT32 containing the current TMR1 settings.
*
* RETURNS:                                                   
*/

_ARM_FUNCTION_CALLED_FROM_C(sysWrite_TMR1)

        /* Write Timer 1 Mode Register */
        mov     pc, lr

/*****************************************************************************
* sysEnable_TMR0 - Enable Timer 0.
*
* RETURNS: 
*/

_ARM_FUNCTION_CALLED_FROM_C(sysEnable_TMR0)

        /* Read Timer 0 Mode Register  */
        /* Set Enable Bit              */
        /* Write Timer 0 Mode Register */
        mov     pc, lr

/*****************************************************************************
* sysEnable_TMR1 - Enable Timer 1.
*
* RETURNS:
*/

_ARM_FUNCTION_CALLED_FROM_C(sysEnable_TMR1)

        /* Read Timer 1 Mode Register  */
        /* Set Enable Bit              */
        /* Write Timer 1 Mode Register */
        mov     pc, lr

/*****************************************************************************
* sysDisable_TMR0 - Disable Timer 0.
*
* RETURNS:
*/

_ARM_FUNCTION_CALLED_FROM_C(sysDisable_TMR0)

        /* Read Timer 0 Mode Register  */
        /* Set Disable Bit             */
        /* Write Timer 0 Mode Register */
        mov     pc, lr

/*****************************************************************************
* sysDisable_TMR1 - Disable Timer 1.
*
* RETURNS:
*/

_ARM_FUNCTION_CALLED_FROM_C(sysDisable_TMR1)

        /* Read Timer 1 Mode Register  */
        /* Set Disable Bit             */
        /* Write Timer 1 Mode Register */
        mov     pc, lr

/*****************************************************************************
* sysEnable_Reload_TMR0 - Enable Timer 0 Auto Reload.
*
* RETURNS:
*/

_ARM_FUNCTION_CALLED_FROM_C(sysEnable_Reload_TMR0)

        /* Read Timer 0 Mode Register  */
        /* Set Enable Auto Reload Bit  */
        /* Write Timer 0 Mode Register */
        mov     pc, lr

/*****************************************************************************
* sysEnable_Reload_TMR1 - Enable Timer 1 Auto Reload.
*
* RETURNS:
*/

_ARM_FUNCTION_CALLED_FROM_C(sysEnable_Reload_TMR1)

        /* Read Timer 1 Mode Register  */
        /* Set Enable Auto Reload Bit  */
        /* Write Timer 1 Mode Register */
        mov     pc, lr

/*****************************************************************************
* sysDisable_Reload_TMR0 - Disable Timer 0 Auto Reload.
*
* RETURNS:
*/

_ARM_FUNCTION_CALLED_FROM_C(sysDisable_Reload_TMR0)

        /* Read Timer 0 Mode Register  */
        /* Set Disable Auto Reload Bit */
        /* Write Timer 0 Mode Register */
        mov     pc, lr

/*****************************************************************************
* sysDisable_Reload_TMR1 - Disable Timer 1 Auto Reload.
*
* RETURNS:
*/

_ARM_FUNCTION_CALLED_FROM_C(sysDisable_Reload_TMR1)

        /* Read Timer 1 Mode Register  */
        /* Set Disable Auto Reload Bit */
        /* Write Timer 1 Mode Register */
        mov     pc, lr

/*****************************************************************************
* sysEnable_PU_Mode_TMR0 - Privileged and User Mode Write Enable for Timer 0.
*
* RETURNS:
*/

_ARM_FUNCTION_CALLED_FROM_C(sysEnable_PU_Mode_TMR0)

        /* Read Timer 0 Mode Register  */
        /* Set Privileged Write Control Bit  */
        /* Write Timer 0 Mode Register */
        mov     pc, lr

/*****************************************************************************
* sysEnable_PU_Mode_TMR1 - Privileged and User Mode Write Enable for Timer 1.
*
* RETURNS:
*/