| 1 | ; $Id: bs3-cmn-TestIsVmmDevTestingPresent.asm 82968 2020-02-04 10:35:17Z vboxsync $
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| 2 | ;; @file
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| 3 | ; BS3Kit - bs3TestIsVmmDevTestingPresent
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| 4 | ;
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| 5 |
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| 6 | ;
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| 7 | ; Copyright (C) 2007-2020 Oracle Corporation
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| 8 | ;
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| 9 | ; This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | ; available from http://www.virtualbox.org. This file is free software;
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| 11 | ; you can redistribute it and/or modify it under the terms of the GNU
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| 12 | ; General Public License (GPL) as published by the Free Software
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| 13 | ; Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | ; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | ; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | ;
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| 17 | ; The contents of this file may alternatively be used under the terms
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| 18 | ; of the Common Development and Distribution License Version 1.0
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| 19 | ; (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | ; VirtualBox OSE distribution, in which case the provisions of the
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| 21 | ; CDDL are applicable instead of those of the GPL.
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| 22 | ;
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| 23 | ; You may elect to license modified versions of this file under the
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| 24 | ; terms and conditions of either the GPL or the CDDL or both.
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| 25 | ;
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| 26 |
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| 27 | %include "bs3kit-template-header.mac"
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| 28 | %include "VBox/VMMDevTesting.mac"
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| 29 |
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| 30 | ;*********************************************************************************************************************************
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| 31 | ;* External Symbols *
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| 32 | ;*********************************************************************************************************************************
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| 33 | BS3_EXTERN_DATA16 g_uBs3CpuDetected
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| 34 | TMPL_BEGIN_TEXT
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| 35 |
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| 36 |
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| 37 | ;;
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| 38 | ; @cproto BS3_DECL(bool) bs3TestIsVmmDevTestingPresent_c16(void);
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| 39 | ;
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| 40 | BS3_PROC_BEGIN_CMN bs3TestIsVmmDevTestingPresent, BS3_PBC_HYBRID_0_ARGS
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| 41 | BS3_CALL_CONV_PROLOG 2
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| 42 | push xBP
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| 43 | mov xBP, xSP
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| 44 | push xDX
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| 45 |
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| 46 | ; Check the response from the NOP port.
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| 47 | mov dx, VMMDEV_TESTING_IOPORT_NOP
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| 48 | cmp byte [g_uBs3CpuDetected], BS3CPU_80386
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| 49 | jb .ancient_cpu
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| 50 | in eax, dx
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| 51 | cmp eax, VMMDEV_TESTING_NOP_RET
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| 52 | .set_ax_and_return:
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| 53 | mov ax, 0
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| 54 | jne .return
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| 55 | mov ax, 1
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| 56 |
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| 57 | .return:
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| 58 | pop xDX
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| 59 | pop xBP
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| 60 | BS3_CALL_CONV_EPILOG 2
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| 61 | BS3_HYBRID_RET
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| 62 |
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| 63 | .ancient_cpu:
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| 64 | in ax, dx
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| 65 | cmp ax, (VMMDEV_TESTING_NOP_RET & 0xffff)
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| 66 | jmp .set_ax_and_return
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| 67 | BS3_PROC_END_CMN bs3TestIsVmmDevTestingPresent
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| 68 |
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