wait.c

Windows CE 6.0 BSP for VOIP sample phone. Intel PXA270 platform.

//
// Copyright (c) Microsoft Corporation.  All rights reserved.
//
//
// Use of this sample source code is subject to the terms of the Microsoft
// license agreement under which you licensed this sample source code. If
// you did not accept the terms of the license agreement, you are not
// authorized to use this sample source code. For the terms of the license,
// please see the license agreement between you and Microsoft or, if applicable,
// see the LICENSE.RTF on your install media or the root of your tools installation.
// THE SAMPLE SOURCE CODE IS PROVIDED "AS IS", WITH NO WARRANTIES OR INDEMNITIES.
//
//  File: Wait.c
//
//  This file contains delay functions for the bootloader.
//
#include <windows.h>
#include "bulverde_base_regs.h"
#include <oal_memory.h>

#define OSCR_OFFSET                     0x10        // OSCR0

void Wait(UINT32 microSeconds)
{
    volatile UINT32 *TimerOSCRAddress= (volatile UINT32 *) OALPAtoVA((BULVERDE_BASE_REG_PA_OST + OSCR_OFFSET), FALSE);
    UINT32 Value, Time;

    Time   = *TimerOSCRAddress;
    Value = Time + (microSeconds * 4);
    if (Value < Time)
    {  // test for wrap.
        while (Time < *TimerOSCRAddress);
    }
    while (*TimerOSCRAddress <= Value);

}

void msWait(UINT32 msVal) 
{
    Wait(msVal*1000);
}