| 1 | ; $Id: bs3-first-pe16.asm 59237 2015-12-31 21:47:49Z vboxsync $
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| 2 | ;; @file
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| 3 | ; BS3Kit - First Object, calling real-mode main().
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| 4 | ;
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| 5 |
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| 6 | ;
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| 7 | ; Copyright (C) 2007-2015 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 |
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| 28 | ;*********************************************************************************************************************************
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| 29 | ;* Header Files *
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| 30 | ;*********************************************************************************************************************************
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| 31 | %include "bs3kit.mac"
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| 32 |
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| 33 | ;
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| 34 | ; Segment defs, grouping and related variables.
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| 35 | ; Defines the entry point 'start' as well, leaving us in BS3TEXT16.
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| 36 | ;
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| 37 | %include "bs3-first-common.mac"
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| 38 |
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| 39 |
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| 40 | ;*********************************************************************************************************************************
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| 41 | ;* External Symbols *
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| 42 | ;*********************************************************************************************************************************
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| 43 | BS3_EXTERN_SYSTEM16 Bs3Lgdt_Gdt
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| 44 | BS3_EXTERN_SYSTEM16 Bs3Lidt_Idt16
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| 45 |
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| 46 | BS3_BEGIN_TEXT16
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| 47 | EXTERN Main_pe16
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| 48 | EXTERN Bs3SwitchToPE16_rm
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| 49 | EXTERN Bs3SwitchToRM_pe16
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| 50 | EXTERN Bs3SwitchToPE32_rm
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| 51 | EXTERN Bs3SwitchTo32Bit_c16
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| 52 | EXTERN Bs3SwitchTo32Bit_c32
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| 53 | EXTERN Bs3SwitchTo16Bit_c16
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| 54 | EXTERN Bs3SwitchTo16Bit_c32
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| 55 | EXTERN Bs3SwitchToPP16_rm
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| 56 | EXTERN Bs3SwitchToRM_pe32
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| 57 | EXTERN Bs3InitMemory_rm
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| 58 | BS3_EXTERN_CMN Bs3Shutdown
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| 59 |
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| 60 | extern _Bs3Printf_c32
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| 61 | extern Bs3Printf_c64
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| 62 |
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| 63 | BS3_BEGIN_TEXT16
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| 64 | ;
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| 65 | ; We need to enter 16-bit protected mode before we can call Main_pe16.
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| 66 | ;
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| 67 | call NAME(Bs3InitMemory_rm) ; Initialize the memory (must be done from real mode).
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| 68 | call NAME(Bs3SwitchToPE16_rm)
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| 69 |
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| 70 | call NAME(Bs3SwitchTo32Bit_c16)
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| 71 | BS3_SET_BITS 32
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| 72 | call NAME(Bs3SwitchTo16Bit_c32)
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| 73 | BS3_SET_BITS 16
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| 74 |
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| 75 | call NAME(Bs3SwitchToRM_pe16)
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| 76 |
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| 77 | call NAME(Bs3SwitchToPE32_rm)
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| 78 | BS3_SET_BITS 32
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| 79 | call NAME(Bs3SwitchToRM_pe32)
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| 80 | BS3_SET_BITS 16
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| 81 | call NAME(Bs3SwitchToPE16_rm)
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| 82 |
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| 83 | call NAME(Bs3SwitchToPP16_rm)
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| 84 |
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| 85 | ;
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| 86 | ; Call main, if it returns shutdown the system.
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| 87 | ;
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| 88 | .halt: hlt
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| 89 | jmp .halt
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| 90 | call NAME(Main_pe16)
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| 91 | call Bs3Shutdown
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| 92 |
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