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);
+}
+