| 1 | /* $Id: bs3-rm-InitAll.c 98103 2023-01-17 14:15:46Z vboxsync $ */
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| 2 | /** @file
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| 3 | * BS3Kit - Initialize all components, real mode.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2007-2023 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * The contents of this file may alternatively be used under the terms
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| 26 | * of the Common Development and Distribution License Version 1.0
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| 27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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| 28 | * in the VirtualBox distribution, in which case the provisions of the
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| 29 | * CDDL are applicable instead of those of the GPL.
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| 30 | *
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| 31 | * You may elect to license modified versions of this file under the
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| 32 | * terms and conditions of either the GPL or the CDDL or both.
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| 33 | *
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| 34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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| 35 | */
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| 36 |
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| 37 |
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| 38 | /*********************************************************************************************************************************
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| 39 | * Header Files *
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| 40 | *********************************************************************************************************************************/
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| 41 | //#define BS3_USE_RM_TEXT_SEG 1
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| 42 | #include "bs3kit-template-header.h"
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| 43 | #include "bs3-cmn-test.h"
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| 44 | #include <iprt/asm-amd64-x86.h>
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| 45 |
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| 46 | BS3_MODE_PROTO_NOSB(void, Bs3EnteredMode,(void));
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| 47 |
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| 48 |
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| 49 | BS3_DECL(void) Bs3InitAll_rm(void)
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| 50 | {
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| 51 | uint8_t volatile BS3_FAR *pcTicksFlpyOff;
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| 52 |
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| 53 | /*
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| 54 | * Detect CPU first as the memory init code will otherwise use 386
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| 55 | * instrunctions and cause trouble on older CPUs.
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| 56 | */
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| 57 | Bs3CpuDetect_rm_far();
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| 58 | Bs3InitMemory_rm_far();
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| 59 | Bs3InitGdt_rm_far();
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| 60 |
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| 61 | /*
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| 62 | * Before we disable all interrupts, try convince the BIOS to stop the
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| 63 | * floppy motor, as it is kind of disturbing when the floppy light remains
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| 64 | * on for the whole testcase execution.
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| 65 | */
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| 66 | ASMIntDisable(); /* (probably already disabled, but no guarantees) */
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| 67 | pcTicksFlpyOff = (uint8_t volatile BS3_FAR *)BS3_FP_MAKE(0x40, 0x40);
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| 68 | if (*pcTicksFlpyOff)
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| 69 | {
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| 70 | uint32_t volatile BS3_FAR *pcTicks = (uint32_t volatile BS3_FAR *)BS3_FP_MAKE(0x40, 0x6c);
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| 71 | uint32_t cInitialTicks;
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| 72 |
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| 73 | *pcTicksFlpyOff = 1; /* speed up the countdown, don't want to wait for two seconds here. */
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| 74 | cInitialTicks = *pcTicks;
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| 75 | ASMIntEnable();
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| 76 |
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| 77 | while (*pcTicks == cInitialTicks)
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| 78 | ASMHalt();
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| 79 | }
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| 80 | ASMIntDisable();
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| 81 | Bs3PicSetup(false /*fForcedReInit*/);
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| 82 |
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| 83 | /*
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| 84 | * Initialize IDTs and such.
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| 85 | */
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| 86 | if (g_uBs3CpuDetected & BS3CPU_F_LONG_MODE)
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| 87 | Bs3Trap64Init();
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| 88 | if ((g_uBs3CpuDetected & BS3CPU_TYPE_MASK) >= BS3CPU_80386)
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| 89 | Bs3Trap32Init();
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| 90 | if ((g_uBs3CpuDetected & BS3CPU_TYPE_MASK) >= BS3CPU_80286)
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| 91 | Bs3Trap16Init();
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| 92 | Bs3TrapRmV86Init();
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| 93 |
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| 94 | /*
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| 95 | * Perform a real-mode enter to make some final environment adjustments
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| 96 | * (like installing our syscall).
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| 97 | */
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| 98 | Bs3EnteredMode_rm();
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| 99 | }
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| 100 |
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