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Diffstat (limited to '')
-rw-r--r-- | src/VBox/ValidationKit/bootsectors/bs3-timers-1-x0.c | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/src/VBox/ValidationKit/bootsectors/bs3-timers-1-x0.c b/src/VBox/ValidationKit/bootsectors/bs3-timers-1-x0.c new file mode 100644 index 00000000..d3dfdb2d --- /dev/null +++ b/src/VBox/ValidationKit/bootsectors/bs3-timers-1-x0.c @@ -0,0 +1,102 @@ +/* $Id: bs3-timers-1-x0.c $ */ +/** @file + * BS3Kit - bs3-timers-1, C test driver code (16-bit). + */ + +/* + * Copyright (C) 2007-2023 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); +} + |