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/* $Id: bs3-timers-1-x0.c $ */
/** @file
* BS3Kit - bs3-timers-1, C test driver code (16-bit).
*/
/*
* Copyright (C) 2007-2022 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define BS3_USE_X0_TEXT_SEG
#include <bs3kit.h>
#include <iprt/asm.h>
#include <iprt/asm-amd64-x86.h>
static uint8_t bs3Timers1_Pit(uint8_t bMode, uint16_t uHz, uint32_t cNsMaxDiviation)
{
uint32_t const cTargetTicks = uHz * 3;
uint16_t uActualHz;
uint64_t cNsElapsed;
int64_t cNsDelta;
uint64_t cNsDeltaAbs;
Bs3PitSetupAndEnablePeriodTimer(uHz);
cNsElapsed = Bs3TestNow();
ASMIntEnable();
uActualHz = g_cBs3PitIntervalHz;
while (g_cBs3PitTicks < cTargetTicks)
ASMHalt();
Bs3PitDisable();
ASMIntDisable();
cNsElapsed = Bs3TestNow() - cNsElapsed;
/* Calculate the absolute delta and fail the test if the diviation is too high... */
cNsDelta = cNsElapsed - RT_NS_1SEC * 3;
cNsDeltaAbs = RT_ABS(cNsDelta);
/*Bs3TestPrintf("cNsElapsed=%RU64 g_cBs3PitTicks=%RU32 uHz=%u -> %RU64ns\n",
cNsElapsed, g_cBs3PitTicks, uActualHz, cNsDeltaAbs);*/
if (cNsDeltaAbs > cNsMaxDiviation)
Bs3TestFailedF("delta %c%RU64 ns (%RI32 ms), max %RU32 ns", cNsDelta < 0 ? '-' : '+', cNsDeltaAbs,
(int32_t)((uint64_t)cNsDelta / RT_NS_1MS), cNsMaxDiviation);
return 0;
}
BS3_DECL_FAR(uint8_t) BS3_CMN_FAR_NM(bs3Timers1_Pit_100Hz)(uint8_t bMode)
{
return bs3Timers1_Pit(bMode, 100, RT_NS_10MS);
}
BS3_DECL_FAR(uint8_t) BS3_CMN_FAR_NM(bs3Timers1_Pit_1000Hz)(uint8_t bMode)
{
return bs3Timers1_Pit(bMode, 1000, RT_NS_10MS);
}
BS3_DECL_FAR(uint8_t) BS3_CMN_FAR_NM(bs3Timers1_Pit_2000Hz)(uint8_t bMode)
{
return bs3Timers1_Pit(bMode, 2000, RT_NS_10MS*2);
}
BS3_DECL_FAR(uint8_t) BS3_CMN_FAR_NM(bs3Timers1_Pit_4000Hz)(uint8_t bMode)
{
return bs3Timers1_Pit(bMode, 4000, RT_NS_10MS*4);
}
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