VirtualBox

source: vbox/trunk/src/VBox/ValidationKit/bootsectors/bs3-timers-1-x0.c@ 98193

Last change on this file since 98193 was 98103, checked in by vboxsync, 2 years ago

Copyright year updates by scm.

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1/* $Id: bs3-timers-1-x0.c 98103 2023-01-17 14:15:46Z vboxsync $ */
2/** @file
3 * BS3Kit - bs3-timers-1, C test driver code (16-bit).
4 */
5
6/*
7 * Copyright (C) 2007-2023 Oracle and/or its affiliates.
8 *
9 * This file is part of VirtualBox base platform packages, as
10 * available from https://www.virtualbox.org.
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation, in version 3 of the
15 * License.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, see <https://www.gnu.org/licenses>.
24 *
25 * The contents of this file may alternatively be used under the terms
26 * of the Common Development and Distribution License Version 1.0
27 * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
28 * in the VirtualBox distribution, in which case the provisions of the
29 * CDDL are applicable instead of those of the GPL.
30 *
31 * You may elect to license modified versions of this file under the
32 * terms and conditions of either the GPL or the CDDL or both.
33 *
34 * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
35 */
36
37
38/*********************************************************************************************************************************
39* Header Files *
40*********************************************************************************************************************************/
41#define BS3_USE_X0_TEXT_SEG
42#include <bs3kit.h>
43#include <iprt/asm.h>
44#include <iprt/asm-amd64-x86.h>
45
46
47static uint8_t bs3Timers1_Pit(uint8_t bMode, uint16_t uHz, uint32_t cNsMaxDiviation)
48{
49 uint32_t const cTargetTicks = uHz * 3;
50 uint16_t uActualHz;
51 uint64_t cNsElapsed;
52 int64_t cNsDelta;
53 uint64_t cNsDeltaAbs;
54
55 Bs3PitSetupAndEnablePeriodTimer(uHz);
56 cNsElapsed = Bs3TestNow();
57 ASMIntEnable();
58 uActualHz = g_cBs3PitIntervalHz;
59
60 while (g_cBs3PitTicks < cTargetTicks)
61 ASMHalt();
62
63 Bs3PitDisable();
64 ASMIntDisable();
65 cNsElapsed = Bs3TestNow() - cNsElapsed;
66
67 /* Calculate the absolute delta and fail the test if the diviation is too high... */
68 cNsDelta = cNsElapsed - RT_NS_1SEC * 3;
69 cNsDeltaAbs = RT_ABS(cNsDelta);
70 /*Bs3TestPrintf("cNsElapsed=%RU64 g_cBs3PitTicks=%RU32 uHz=%u -> %RU64ns\n",
71 cNsElapsed, g_cBs3PitTicks, uActualHz, cNsDeltaAbs);*/
72 if (cNsDeltaAbs > cNsMaxDiviation)
73 Bs3TestFailedF("delta %c%RU64 ns (%RI32 ms), max %RU32 ns", cNsDelta < 0 ? '-' : '+', cNsDeltaAbs,
74 (int32_t)((uint64_t)cNsDelta / RT_NS_1MS), cNsMaxDiviation);
75
76 return 0;
77}
78
79
80BS3_DECL_FAR(uint8_t) BS3_CMN_FAR_NM(bs3Timers1_Pit_100Hz)(uint8_t bMode)
81{
82 return bs3Timers1_Pit(bMode, 100, RT_NS_10MS);
83}
84
85
86BS3_DECL_FAR(uint8_t) BS3_CMN_FAR_NM(bs3Timers1_Pit_1000Hz)(uint8_t bMode)
87{
88 return bs3Timers1_Pit(bMode, 1000, RT_NS_10MS);
89}
90
91
92BS3_DECL_FAR(uint8_t) BS3_CMN_FAR_NM(bs3Timers1_Pit_2000Hz)(uint8_t bMode)
93{
94 return bs3Timers1_Pit(bMode, 2000, RT_NS_10MS*2);
95}
96
97
98BS3_DECL_FAR(uint8_t) BS3_CMN_FAR_NM(bs3Timers1_Pit_4000Hz)(uint8_t bMode)
99{
100 return bs3Timers1_Pit(bMode, 4000, RT_NS_10MS*4);
101}
102
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