| 1 | /* $Id: DevPcArch.cpp 56292 2015-06-09 14:20:46Z vboxsync $ */
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| 2 | /** @file
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| 3 | * DevPcArch - PC Architecture Device.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2015 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 |
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| 18 | /*******************************************************************************
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| 19 | * Header Files *
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| 20 | *******************************************************************************/
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| 21 | #define LOG_GROUP LOG_GROUP_DEV_PC_ARCH
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| 22 | #include <VBox/vmm/pdmdev.h>
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| 23 | #include <VBox/vmm/mm.h>
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| 24 | #include <VBox/log.h>
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| 25 | #include <VBox/err.h>
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| 26 | #include <iprt/assert.h>
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| 27 | #include <iprt/string.h>
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| 28 |
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| 29 | #include "VBoxDD.h"
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| 30 |
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| 31 |
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| 32 | /*******************************************************************************
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| 33 | * Structures and Typedefs *
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| 34 | *******************************************************************************/
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| 35 |
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| 36 | /**
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| 37 | * PC Bios instance data structure.
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| 38 | */
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| 39 | typedef struct DEVPCARCH
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| 40 | {
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| 41 | /** Pointer back to the device instance. */
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| 42 | PPDMDEVINS pDevIns;
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| 43 | } DEVPCARCH, *PDEVPCARCH;
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| 44 |
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| 45 |
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| 46 |
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| 47 | /**
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| 48 | * @callback_method_impl{FNIOMIOPORTIN, Math coprocessor.}
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| 49 | */
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| 50 | static DECLCALLBACK(int) pcarchIOPortFPURead(PPDMDEVINS pDevIns, void *pvUser, RTIOPORT Port, uint32_t *pu32, unsigned cb)
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| 51 | {
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| 52 | int rc;
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| 53 | NOREF(pvUser); NOREF(pDevIns); NOREF(pu32);
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| 54 | rc = PDMDevHlpDBGFStop(pDevIns, RT_SRC_POS, "Port=%#x cb=%d\n", Port, cb);
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| 55 | if (rc == VINF_SUCCESS)
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| 56 | rc = VERR_IOM_IOPORT_UNUSED;
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| 57 | return rc;
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| 58 | }
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| 59 |
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| 60 | /**
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| 61 | * @callback_method_impl{FNIOMIOPORTOUT, Math coprocessor.}
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| 62 | * @todo Add IGNNE support.
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| 63 | */
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| 64 | static DECLCALLBACK(int) pcarchIOPortFPUWrite(PPDMDEVINS pDevIns, void *pvUser, RTIOPORT Port, uint32_t u32, unsigned cb)
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| 65 | {
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| 66 | int rc = VINF_SUCCESS;
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| 67 | NOREF(pvUser);
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| 68 | if (cb == 1)
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| 69 | {
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| 70 | switch (Port)
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| 71 | {
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| 72 | /*
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| 73 | * Clear busy latch.
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| 74 | */
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| 75 | case 0xf0:
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| 76 | Log2(("PCARCH: FPU Clear busy latch u32=%#x\n", u32));
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| 77 | /* This is triggered when booting Knoppix (3.7) */
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| 78 | #if 0
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| 79 | if (!u32)
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| 80 | rc = PDMDeviceDBGFStop(pDevIns, RT_SRC_POS, "Port=%#x cb=%d u32=%#x\n", Port, cb, u32);
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| 81 | #endif
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| 82 | /* pDevIns->pHlp->pfnPICSetIrq(pDevIns, 13, 0); */
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| 83 | break;
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| 84 |
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| 85 | /* Reset. */
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| 86 | case 0xf1:
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| 87 | Log2(("PCARCH: FPU Reset cb=%d u32=%#x\n", Port, cb, u32));
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| 88 | /** @todo figure out what the difference between FPU ports 0xf0 and 0xf1 are... */
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| 89 | /* pDevIns->pHlp->pfnPICSetIrq(pDevIns, 13, 0); */
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| 90 | break;
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| 91 |
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| 92 | /* opcode transfers */
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| 93 | case 0xf8:
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| 94 | case 0xfa:
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| 95 | case 0xfc:
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| 96 | default:
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| 97 | rc = PDMDevHlpDBGFStop(pDevIns, RT_SRC_POS, "Port=%#x cb=%d u32=%#x\n", Port, cb, u32);
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| 98 | break;
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| 99 | }
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| 100 | /* this works better, but probably not entirely correct. */
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| 101 | PDMDevHlpISASetIrq(pDevIns, 13, 0);
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| 102 | }
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| 103 | else
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| 104 | rc = PDMDevHlpDBGFStop(pDevIns, RT_SRC_POS, "Port=%#x cb=%d u32=%#x\n", Port, cb, u32);
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| 105 | return rc;
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| 106 | }
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| 107 |
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| 108 |
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| 109 | /**
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| 110 | * @callback_method_impl{FNIOMIOPORTIN, PS/2 system control port A.}
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| 111 | *
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| 112 | * @todo Check if the A20 enable/disable method implemented here in any way
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| 113 | * should cooperate with the one implemented in the PS/2 keyboard device.
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| 114 | * This probably belongs together in the PS/2 keyboard device (since that
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| 115 | * is where the "port B" mentioned by Ralph Brown is implemented).
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| 116 | *
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| 117 | * @remark Ralph Brown and friends have this to say about this port:
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| 118 | *
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| 119 | * @verbatim
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| 120 | 0092 RW PS/2 system control port A (port B is at PORT 0061h) (see #P0415)
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| 121 |
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| 122 | Bitfields for PS/2 system control port A:
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| 123 | Bit(s) Description (Table P0415)
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| 124 | 7-6 any bit set to 1 turns activity light on
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| 125 | 5 unused
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| 126 | 4 watchdog timout occurred
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| 127 | 3 =0 RTC/CMOS security lock (on password area) unlocked
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| 128 | =1 CMOS locked (done by POST)
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| 129 | 2 unused
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| 130 | 1 A20 is active
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| 131 | 0 =0 system reset or write
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| 132 | =1 pulse alternate reset pin (high-speed alternate CPU reset)
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| 133 | Notes: once set, bit 3 may only be cleared by a power-on reset
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| 134 | on at least the C&T 82C235, bit 0 remains set through a CPU reset to
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| 135 | allow the BIOS to determine the reset method
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| 136 | on the PS/2 30-286 & "Tortuga" the INT 15h/87h memory copy does
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| 137 | not use this port for A20 control, but instead uses the keyboard
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| 138 | controller (8042). Reportedly this may cause the system to crash
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| 139 | when access to the 8042 is disabled in password server mode
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| 140 | (see #P0398).
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| 141 | SeeAlso: #P0416,#P0417,MSR 00001000h
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| 142 | * @endverbatim
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| 143 | */
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| 144 | static DECLCALLBACK(int)
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| 145 | pcarchIOPortPS2SysControlPortARead(PPDMDEVINS pDevIns, void *pvUser, RTIOPORT Port, uint32_t *pu32, unsigned cb)
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| 146 | {
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| 147 | if (cb == 1)
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| 148 | {
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| 149 | *pu32 = PDMDevHlpA20IsEnabled(pDevIns) << 1;
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| 150 | return VINF_SUCCESS;
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| 151 | }
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| 152 | return PDMDevHlpDBGFStop(pDevIns, RT_SRC_POS, "Port=%#x cb=%d\n", Port, cb);
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| 153 | }
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| 154 |
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| 155 |
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| 156 | /**
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| 157 | * @callback_method_impl{FNIOMIOPORTOUT, PS/2 system control port A.}
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| 158 | * @see Remark and todo of pcarchIOPortPS2SysControlPortARead().
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| 159 | */
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| 160 | static DECLCALLBACK(int)
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| 161 | pcarchIOPortPS2SysControlPortAWrite(PPDMDEVINS pDevIns, void *pvUser, RTIOPORT Port, uint32_t u32, unsigned cb)
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| 162 | {
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| 163 | NOREF(pvUser);
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| 164 | if (cb == 1)
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| 165 | {
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| 166 | /*
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| 167 | * Fast reset?
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| 168 | */
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| 169 | if (u32 & 1)
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| 170 | {
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| 171 | LogRel(("Reset initiated by system port A\n"));
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| 172 | return PDMDevHlpVMReset(pDevIns);
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| 173 | }
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| 174 |
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| 175 | /*
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| 176 | * A20 is the only thing we care about of the other stuff.
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| 177 | */
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| 178 | PDMDevHlpA20Set(pDevIns, !!(u32 & 2));
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| 179 | return VINF_SUCCESS;
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| 180 | }
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| 181 | return PDMDevHlpDBGFStop(pDevIns, RT_SRC_POS, "Port=%#x cb=%d u32=%#x\n", Port, cb, u32);
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| 182 | }
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| 183 |
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| 184 |
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| 185 | /**
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| 186 | * @interface_method_impl{PDMDEVREG,pfnConstruct}
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| 187 | */
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| 188 | static DECLCALLBACK(int) pcarchConstruct(PPDMDEVINS pDevIns, int iInstance, PCFGMNODE pCfg)
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| 189 | {
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| 190 | PDEVPCARCH pThis = PDMINS_2_DATA(pDevIns, PDEVPCARCH);
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| 191 | int rc;
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| 192 | Assert(iInstance == 0);
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| 193 |
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| 194 | /*
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| 195 | * Validate configuration.
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| 196 | */
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| 197 | if (!CFGMR3AreValuesValid(pCfg, "\0"))
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| 198 | return VERR_PDM_DEVINS_UNKNOWN_CFG_VALUES;
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| 199 |
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| 200 | /*
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| 201 | * Init the data.
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| 202 | */
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| 203 | pThis->pDevIns = pDevIns;
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| 204 |
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| 205 | /*
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| 206 | * Register I/O Ports
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| 207 | */
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| 208 | rc = PDMDevHlpIOPortRegister(pDevIns, 0xF0, 0x10, NULL,
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| 209 | pcarchIOPortFPUWrite, pcarchIOPortFPURead,
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| 210 | NULL, NULL, "Math Co-Processor (DOS/OS2 mode)");
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| 211 | if (RT_FAILURE(rc))
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| 212 | return rc;
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| 213 | rc = PDMDevHlpIOPortRegister(pDevIns, 0x92, 1, NULL,
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| 214 | pcarchIOPortPS2SysControlPortAWrite, pcarchIOPortPS2SysControlPortARead,
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| 215 | NULL, NULL, "PS/2 system control port A (A20 and more)");
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| 216 | if (RT_FAILURE(rc))
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| 217 | return rc;
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| 218 |
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| 219 | return VINF_SUCCESS;
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| 220 | }
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| 221 |
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| 222 |
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| 223 | /**
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| 224 | * The device registration structure.
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| 225 | */
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| 226 | const PDMDEVREG g_DevicePcArch =
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| 227 | {
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| 228 | /* u32Version */
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| 229 | PDM_DEVREG_VERSION,
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| 230 | /* szName */
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| 231 | "pcarch",
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| 232 | /* szRCMod */
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| 233 | "",
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| 234 | /* szR0Mod */
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| 235 | "",
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| 236 | /* pszDescription */
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| 237 | "PC Architecture Device",
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| 238 | /* fFlags */
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| 239 | PDM_DEVREG_FLAGS_HOST_BITS_DEFAULT | PDM_DEVREG_FLAGS_GUEST_BITS_DEFAULT,
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| 240 | /* fClass */
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| 241 | PDM_DEVREG_CLASS_ARCH,
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| 242 | /* cMaxInstances */
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| 243 | 1,
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| 244 | /* cbInstance */
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| 245 | sizeof(DEVPCARCH),
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| 246 | /* pfnConstruct */
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| 247 | pcarchConstruct,
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| 248 | /* pfnDestruct */
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| 249 | NULL,
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| 250 | /* pfnRelocate */
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| 251 | NULL,
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| 252 | /* pfnMemSetup */
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| 253 | NULL,
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| 254 | /* pfnPowerOn */
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| 255 | NULL,
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| 256 | /* pfnReset */
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| 257 | NULL,
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| 258 | /* pfnSuspend */
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| 259 | NULL,
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| 260 | /* pfnResume */
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| 261 | NULL,
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| 262 | /* pfnAttach */
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| 263 | NULL,
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| 264 | /* pfnDetach */
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| 265 | NULL,
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| 266 | /* pfnQueryInterface. */
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| 267 | NULL,
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| 268 | /* pfnInitComplete. */
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| 269 | NULL,
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| 270 | /* pfnPowerOff */
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| 271 | NULL,
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| 272 | /* pfnSoftReset */
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| 273 | NULL,
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| 274 | /* u32VersionEnd */
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| 275 | PDM_DEVREG_VERSION
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| 276 | };
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| 277 |
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