复位操作

/*
---------------------------------------------------------------
作    者:温子祺
联系方式:wenziqi@hotmail.com

说     明:WINCE复位操作
---------------------------------------------------------------
*/

C:\WINCE600\PLATFORM\Mini2440\src\common\ioctl\reboot

源码：

 

#include <oal.h>


//------------------------------------------------------------------------------
//
//  Function: OALIoCtlHalReboot
//
//
BOOL OALIoCtlHalReboot(UINT32 code, VOID *pInpBuffer, 
                       UINT32 inpSize, VOID *pOutBuffer, 
                       UINT32 outSize, UINT32 *pOutSize)
{
    //
    // If the board design supports software-controllable hardware reset logic, it should be
    // used.  Because this routine is specific to the S3C2440A CPU, it only uses the watchdog
    // timer to assert reset.  One downside to this approach is that nRSTOUT isn't asserted
    // so any board-level logic isn't reset via this method.  This routine can be overidden in
    // the specific platform code to control board-level reset logic, should it exist.
    //

    volatile S3C2440A_WATCHDOG_REG *pWDRegs = (volatile S3C2440A_WATCHDOG_REG *) 
                                              OALPAtoVA(S3C2440A_BASE_REG_PA_WATCHDOG, FALSE);

    OALMSG(OAL_IOCTL&&OAL_FUNC, (L"+OALIoCtlHalReboot\r\n"));

    // Setup the watchdog.
    //
    pWDRegs->WTDAT = 0;
    pWDRegs->WTCNT = 5;         // Load count with low value.
    pWDRegs->WTCON = 0x8021;    // Enable watchdog timer...

    // Wait for watchdog reset...
    //
    while(TRUE);

    // Should never get to this point...
    //
    OALMSG(OAL_IOCTL&&OAL_FUNC, (L"-OALIoCtlHalReboot\r\n"));

    return(TRUE);

}

    在OALIoCtlHalReboot函数中，复位操作很简单，只需要对看门狗相关的寄存器进行配置，然后等待看门狗计数器溢出，看门狗就会复位ARM。

OALIoCtlHalReboot输入参数如下：

code

[in] Set to IOCTL_HAL_REBOOT to support a warm boot of the target device.

pInpBuffer

[in] Not used; set to NULL.

inpSize

[in] Not used; set to zero.

pOutBuffer

[in] Ignored; set to NULL.

outSize

[in] Not used; set to zero.

pOutSize

[in] Not used; may be set to NULL.

即OALIoCtlHalReboot(IOCTL_HAL_REBOOT,NULL,0,NULL,0,NULL);

       转载请注明出处，谢谢！