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diff --git a/src/VBox/Devices/Storage/DevFdc.cpp b/src/VBox/Devices/Storage/DevFdc.cpp
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+/* $Id: DevFdc.cpp $ */
+/** @file
+ * VBox storage devices - Floppy disk controller
+ */
+
+/*
+ * Copyright (C) 2006-2023 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>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ * --------------------------------------------------------------------
+ *
+ * This code is based on:
+ *
+ * QEMU Floppy disk emulator (Intel 82078)
+ *
+ * Copyright (c) 2003 Jocelyn Mayer
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ */
+
+
+/*********************************************************************************************************************************
+* Header Files *
+*********************************************************************************************************************************/
+#define LOG_GROUP LOG_GROUP_DEV_FDC
+#include <VBox/vmm/pdmdev.h>
+#include <VBox/vmm/pdmstorageifs.h>
+#include <VBox/AssertGuest.h>
+#include <iprt/assert.h>
+#include <iprt/string.h>
+#include <iprt/uuid.h>
+
+#include "VBoxDD.h"
+
+
+/*********************************************************************************************************************************
+* Defined Constants And Macros *
+*********************************************************************************************************************************/
+/** @name FDC saved state versions
+ * @{ */
+#define FDC_SAVESTATE_CURRENT 3 /**< Current version. */
+#define FDC_SAVESTATE_PRE_DELAY 2 /**< Pre IRQDelay. */
+#define FDC_SAVESTATE_OLD 1 /**< The original saved state. */
+/** @}*/
+
+#define MAX_FD 2
+
+
+/********************************************************/
+/* debug Floppy devices */
+/* #define DEBUG_FLOPPY */
+
+#ifdef LOG_ENABLED
+# define FLOPPY_DPRINTF(...) Log(("floppy: " __VA_ARGS__))
+#else
+# define FLOPPY_DPRINTF(...) do { } while (0)
+#endif
+
+#define FLOPPY_ERROR RTLogPrintf
+
+typedef struct fdctrl_t fdctrl_t;
+
+/********************************************************/
+/* Floppy drive emulation */
+
+/* Drive selection note:
+ * For many commands, the FDC can select one of four drives through the
+ * second command byte. The Digital Output Register (DOR) can also select
+ * one of four drives. On PCs, the FDC drive selection is ignored, but
+ * should be reflected back in command status. Only the DOR drive selection
+ * is effective; on old PCs with a discrete NEC uPD765 or similar, the FDC
+ * drive selection signals (US0/US1) are not connected at all.
+ * NB: A drive is actually selected only when its motor on bit in the DOR
+ * is also set. It is possible to have no drive selected.
+ *
+ * The FDC cur_drv field tracks the drive the FDC thinks is selected, but
+ * the DOR is used for actual drive selection.
+ */
+
+#define GET_CUR_DRV(fdctrl) ((fdctrl)->cur_drv)
+#define SET_CUR_DRV(fdctrl, drive) ((fdctrl)->cur_drv = (drive))
+
+/* Will always be a fixed parameter for us */
+#define FD_SECTOR_LEN 512
+#define FD_SECTOR_SC 2 /* Sector size code */
+#define FD_RESET_SENSEI_COUNT 4 /* Number of sense interrupts on RESET */
+
+/* Floppy disk drive emulation */
+typedef enum fdrive_type_t {
+ FDRIVE_DRV_144 = 0x00, /* 1.44 MB 3"5 drive */
+ FDRIVE_DRV_288 = 0x01, /* 2.88 MB 3"5 drive */
+ FDRIVE_DRV_120 = 0x02, /* 1.2 MB 5"25 drive */
+ FDRIVE_DRV_NONE = 0x03, /* No drive connected */
+ FDRIVE_DRV_FAKE_15_6 = 0x0e, /* Fake 15.6 MB drive. */
+ FDRIVE_DRV_FAKE_63_5 = 0x0f /* Fake 63.5 MB drive. */
+} fdrive_type_t;
+
+typedef uint8_t fdrive_flags_t;
+#define FDISK_DBL_SIDES UINT8_C(0x01)
+
+typedef enum fdrive_rate_t {
+ FDRIVE_RATE_500K = 0x00, /* 500 Kbps */
+ FDRIVE_RATE_300K = 0x01, /* 300 Kbps */
+ FDRIVE_RATE_250K = 0x02, /* 250 Kbps */
+ FDRIVE_RATE_1M = 0x03 /* 1 Mbps */
+} fdrive_rate_t;
+
+/**
+ * The status for one drive.
+ *
+ * @implements PDMIBASE
+ * @implements PDMIMEDIAPORT
+ * @implements PDMIMOUNTNOTIFY
+ */
+typedef struct fdrive_t {
+ /** Pointer to the owning device instance. */
+ R3PTRTYPE(PPDMDEVINS) pDevIns;
+ /** Pointer to the attached driver's base interface. */
+ R3PTRTYPE(PPDMIBASE) pDrvBase;
+ /** Pointer to the attached driver's block interface. */
+ R3PTRTYPE(PPDMIMEDIA) pDrvMedia;
+ /** Pointer to the attached driver's mount interface.
+ * This is NULL if the driver isn't a removable unit. */
+ R3PTRTYPE(PPDMIMOUNT) pDrvMount;
+ /** The base interface. */
+ PDMIBASE IBase;
+ /** The block port interface. */
+ PDMIMEDIAPORT IPort;
+ /** The mount notify interface. */
+ PDMIMOUNTNOTIFY IMountNotify;
+ /** The LUN #. */
+ RTUINT iLUN;
+ /** The LED for this LUN. */
+ PDMLED Led;
+ /* Drive status */
+ fdrive_type_t drive;
+ uint8_t perpendicular; /* 2.88 MB access mode */
+ uint8_t dsk_chg; /* Disk change line */
+ /* Position */
+ uint8_t head;
+ uint8_t track;
+ uint8_t sect;
+ uint8_t ltrk; /* Logical track */
+ /* Media */
+ fdrive_flags_t flags;
+ uint8_t last_sect; /* Nb sector per track */
+ uint8_t max_track; /* Nb of tracks */
+ uint16_t bps; /* Bytes per sector */
+ uint8_t ro; /* Is read-only */
+ uint8_t media_rate; /* Data rate of medium */
+} fdrive_t;
+
+#define NUM_SIDES(drv) (drv->flags & FDISK_DBL_SIDES ? 2 : 1)
+
+static void fd_init(fdrive_t *drv, bool fInit)
+{
+ /* Drive */
+ if (fInit) {
+ /* Fixate the drive type at init time if possible. */
+ if (drv->pDrvMedia) {
+ PDMMEDIATYPE enmType = drv->pDrvMedia->pfnGetType(drv->pDrvMedia);
+ switch (enmType) {
+ case PDMMEDIATYPE_FLOPPY_360:
+ case PDMMEDIATYPE_FLOPPY_1_20:
+ drv->drive = FDRIVE_DRV_120;
+ break;
+ case PDMMEDIATYPE_FLOPPY_720:
+ case PDMMEDIATYPE_FLOPPY_1_44:
+ drv->drive = FDRIVE_DRV_144;
+ break;
+ default:
+ AssertFailed();
+ RT_FALL_THRU();
+ case PDMMEDIATYPE_FLOPPY_2_88:
+ drv->drive = FDRIVE_DRV_288;
+ break;
+ case PDMMEDIATYPE_FLOPPY_FAKE_15_6:
+ drv->drive = FDRIVE_DRV_FAKE_15_6;
+ break;
+ case PDMMEDIATYPE_FLOPPY_FAKE_63_5:
+ drv->drive = FDRIVE_DRV_FAKE_63_5;
+ break;
+ }
+ } else {
+ drv->drive = FDRIVE_DRV_NONE;
+ }
+ } /* else: The BIOS (and others) get the drive type via the CMOS, so
+ don't change it after the VM has been constructed. */
+ drv->perpendicular = 0;
+ /* Disk */
+ drv->last_sect = 0;
+ drv->max_track = 0;
+}
+
+static int fd_sector_calc(uint8_t head, uint8_t track, uint8_t sect,
+ uint8_t last_sect, uint8_t num_sides)
+{
+ return (((track * num_sides) + head) * last_sect) + sect - 1; /* sect >= 1 */
+}
+
+/* Returns current position, in sectors, for given drive */
+static int fd_sector(fdrive_t *drv)
+{
+ return fd_sector_calc(drv->head, drv->track, drv->sect, drv->last_sect, NUM_SIDES(drv));
+}
+
+/* Seek to a new position:
+ * returns 0 if already on right track
+ * returns 1 if track changed
+ * returns 2 if track is invalid
+ * returns 3 if sector is invalid
+ * returns 4 if seek is disabled
+ * returns 5 if no media in drive
+ */
+static int fd_seek(fdrive_t *drv, uint8_t head, uint8_t track, uint8_t sect,
+ int enable_seek)
+{
+ int sector;
+ int ret;
+
+ if (!drv->last_sect) {
+ FLOPPY_DPRINTF("no disk in drive (max=%d h=%d c=%02x =s%02x) -> 5\n",
+ 1, NUM_SIDES(drv) - 1, drv->max_track, drv->last_sect);
+ return 5;
+ }
+ if (track > drv->max_track ||
+ (head != 0 && (drv->flags & FDISK_DBL_SIDES) == 0)) {
+ FLOPPY_DPRINTF("try to read h=%d c=%02x s=%02x (max=%d h=%d c=%02x s=%02x) -> 2\n",
+ head, track, sect,
+ 1, NUM_SIDES(drv) - 1, drv->max_track, drv->last_sect);
+ return 2;
+ }
+ if (sect > drv->last_sect || sect < 1) {
+ FLOPPY_DPRINTF("try to read h=%d c=%02x s=%02x (max=%d h=%d c=%02x s=%02x) -> 3\n",
+ head, track, sect,
+ 1, NUM_SIDES(drv) - 1, drv->max_track, drv->last_sect);
+ return 3;
+ }
+ sector = fd_sector_calc(head, track, sect, drv->last_sect, NUM_SIDES(drv));
+ ret = 0;
+ if (sector != fd_sector(drv)) {
+#if 0
+ if (!enable_seek) {
+ FLOPPY_ERROR("no implicit seek %d %02x %02x (max=%d %02x %02x)\n",
+ head, track, sect, 1, drv->max_track, drv->last_sect);
+ return 4;
+ }
+#else
+ RT_NOREF(enable_seek);
+#endif
+ drv->head = head;
+ if (drv->track != track)
+ ret = 1;
+ drv->track = track;
+ drv->sect = sect;
+ }
+ drv->ltrk = drv->track;
+
+ return ret;
+}
+
+/* Set drive back to track 0 */
+static void fd_recalibrate(fdrive_t *drv)
+{
+ FLOPPY_DPRINTF("recalibrate\n");
+ drv->head = 0;
+ drv->track = 0;
+ drv->ltrk = 0;
+ drv->sect = 1;
+}
+
+/* Recognize floppy formats */
+typedef struct fd_format_t {
+ fdrive_type_t drive;
+ uint8_t last_sect; /**< Number of sectors. */
+ uint8_t max_track; /**< Number of tracks. */
+ uint8_t max_head; /**< Max head number. */
+ fdrive_rate_t rate;
+ const char *str;
+} fd_format_t;
+
+/* Note: Low-density disks (160K/180K/320K/360K) use 250 Kbps data rate
+ * in 40-track drives, but 300 Kbps in high-capacity 80-track drives.
+ */
+static fd_format_t const fd_formats[] = {
+ /* First entry is default format */
+ /* 1.44 MB 3"1/2 floppy disks */
+ { FDRIVE_DRV_144, 18, 80, 1, FDRIVE_RATE_500K, "1.44 MB 3\"1/2", },
+ { FDRIVE_DRV_144, 20, 80, 1, FDRIVE_RATE_500K, "1.6 MB 3\"1/2", },
+ { FDRIVE_DRV_144, 21, 80, 1, FDRIVE_RATE_500K, "1.68 MB 3\"1/2", },
+ { FDRIVE_DRV_144, 21, 82, 1, FDRIVE_RATE_500K, "1.72 MB 3\"1/2", },
+ { FDRIVE_DRV_144, 21, 83, 1, FDRIVE_RATE_500K, "1.74 MB 3\"1/2", },
+ { FDRIVE_DRV_144, 22, 80, 1, FDRIVE_RATE_500K, "1.76 MB 3\"1/2", },
+ { FDRIVE_DRV_144, 23, 80, 1, FDRIVE_RATE_500K, "1.84 MB 3\"1/2", },
+ { FDRIVE_DRV_144, 24, 80, 1, FDRIVE_RATE_500K, "1.92 MB 3\"1/2", },
+ /* 2.88 MB 3"1/2 floppy disks */
+ { FDRIVE_DRV_288, 36, 80, 1, FDRIVE_RATE_1M, "2.88 MB 3\"1/2", },
+ { FDRIVE_DRV_288, 39, 80, 1, FDRIVE_RATE_1M, "3.12 MB 3\"1/2", },
+ { FDRIVE_DRV_288, 40, 80, 1, FDRIVE_RATE_1M, "3.2 MB 3\"1/2", },
+ { FDRIVE_DRV_288, 44, 80, 1, FDRIVE_RATE_1M, "3.52 MB 3\"1/2", },
+ { FDRIVE_DRV_288, 48, 80, 1, FDRIVE_RATE_1M, "3.84 MB 3\"1/2", },
+ /* 720 kB 3"1/2 floppy disks */
+ { FDRIVE_DRV_144, 9, 80, 1, FDRIVE_RATE_250K, "720 kB 3\"1/2", },
+ { FDRIVE_DRV_144, 10, 80, 1, FDRIVE_RATE_250K, "800 kB 3\"1/2", },
+ { FDRIVE_DRV_144, 10, 82, 1, FDRIVE_RATE_250K, "820 kB 3\"1/2", },
+ { FDRIVE_DRV_144, 10, 83, 1, FDRIVE_RATE_250K, "830 kB 3\"1/2", },
+ { FDRIVE_DRV_144, 13, 80, 1, FDRIVE_RATE_250K, "1.04 MB 3\"1/2", },
+ { FDRIVE_DRV_144, 14, 80, 1, FDRIVE_RATE_250K, "1.12 MB 3\"1/2", },
+ /* 1.2 MB 5"1/4 floppy disks */
+ { FDRIVE_DRV_120, 15, 80, 1, FDRIVE_RATE_500K, "1.2 MB 5\"1/4", },
+ { FDRIVE_DRV_120, 16, 80, 1, FDRIVE_RATE_500K, "1.28 MB 5\"1/4", }, /* CP Backup 5.25" HD */
+ { FDRIVE_DRV_120, 18, 80, 1, FDRIVE_RATE_500K, "1.44 MB 5\"1/4", },
+ { FDRIVE_DRV_120, 18, 82, 1, FDRIVE_RATE_500K, "1.48 MB 5\"1/4", },
+ { FDRIVE_DRV_120, 18, 83, 1, FDRIVE_RATE_500K, "1.49 MB 5\"1/4", },
+ { FDRIVE_DRV_120, 20, 80, 1, FDRIVE_RATE_500K, "1.6 MB 5\"1/4", },
+ /* 720 kB 5"1/4 floppy disks */
+ { FDRIVE_DRV_120, 9, 80, 1, FDRIVE_RATE_300K, "720 kB 5\"1/4", },
+ { FDRIVE_DRV_120, 11, 80, 1, FDRIVE_RATE_300K, "880 kB 5\"1/4", },
+ /* 360 kB 5"1/4 floppy disks (newer 9-sector formats) */
+ { FDRIVE_DRV_120, 9, 40, 1, FDRIVE_RATE_300K, "360 kB 5\"1/4", },
+ { FDRIVE_DRV_120, 9, 40, 0, FDRIVE_RATE_300K, "180 kB 5\"1/4", },
+ { FDRIVE_DRV_120, 10, 40, 1, FDRIVE_RATE_300K, "400 kB 5\"1/4", }, /* CP Backup 5.25" DD */
+ { FDRIVE_DRV_120, 10, 41, 1, FDRIVE_RATE_300K, "410 kB 5\"1/4", },
+ { FDRIVE_DRV_120, 10, 42, 1, FDRIVE_RATE_300K, "420 kB 5\"1/4", },
+ /* 320 kB 5"1/4 floppy disks (old 8-sector formats) */
+ { FDRIVE_DRV_120, 8, 40, 1, FDRIVE_RATE_300K, "320 kB 5\"1/4", },
+ { FDRIVE_DRV_120, 8, 40, 0, FDRIVE_RATE_300K, "160 kB 5\"1/4", },
+ /* 1.2 MB and low density 3"1/2 floppy 'aliases' */
+ { FDRIVE_DRV_144, 15, 80, 1, FDRIVE_RATE_500K, "1.2 MB 3\"1/2", },
+ { FDRIVE_DRV_144, 16, 80, 1, FDRIVE_RATE_500K, "1.28 MB 3\"1/2", },
+ { FDRIVE_DRV_144, 10, 40, 1, FDRIVE_RATE_300K, "400 kB 3\"1/2", }, /* CP Backup 5.25" DD */
+ { FDRIVE_DRV_144, 9, 40, 1, FDRIVE_RATE_300K, "360 kB 3\"1/2", },
+ { FDRIVE_DRV_144, 9, 40, 0, FDRIVE_RATE_300K, "180 kB 3\"1/2", },
+ { FDRIVE_DRV_144, 8, 40, 1, FDRIVE_RATE_300K, "320 kB 3\"1/2", },
+ { FDRIVE_DRV_144, 8, 40, 0, FDRIVE_RATE_300K, "160 kB 3\"1/2", },
+ /* For larger than real life floppy images (see DrvBlock.cpp). */
+ /* 15.6 MB fake floppy disk (just need something big). */
+ { FDRIVE_DRV_FAKE_15_6, 63, 255, 1, FDRIVE_RATE_1M, "15.6 MB fake 15.6", },
+ { FDRIVE_DRV_FAKE_15_6, 36, 80, 1, FDRIVE_RATE_1M, "2.88 MB fake 15.6", },
+ { FDRIVE_DRV_FAKE_15_6, 39, 80, 1, FDRIVE_RATE_1M, "3.12 MB fake 15.6", },
+ { FDRIVE_DRV_FAKE_15_6, 40, 80, 1, FDRIVE_RATE_1M, "3.2 MB fake 15.6", },
+ { FDRIVE_DRV_FAKE_15_6, 44, 80, 1, FDRIVE_RATE_1M, "3.52 MB fake 15.6", },
+ { FDRIVE_DRV_FAKE_15_6, 48, 80, 1, FDRIVE_RATE_1M, "3.84 MB fake 15.6", },
+ { FDRIVE_DRV_FAKE_15_6, 18, 80, 1, FDRIVE_RATE_500K, "1.44 MB fake 15.6", },
+ { FDRIVE_DRV_FAKE_15_6, 20, 80, 1, FDRIVE_RATE_500K, "1.6 MB fake 15.6", },
+ { FDRIVE_DRV_FAKE_15_6, 21, 80, 1, FDRIVE_RATE_500K, "1.68 MB fake 15.6", },
+ { FDRIVE_DRV_FAKE_15_6, 21, 82, 1, FDRIVE_RATE_500K, "1.72 MB fake 15.6", },
+ { FDRIVE_DRV_FAKE_15_6, 21, 83, 1, FDRIVE_RATE_500K, "1.74 MB fake 15.6", },
+ { FDRIVE_DRV_FAKE_15_6, 22, 80, 1, FDRIVE_RATE_500K, "1.76 MB fake 15.6", },
+ { FDRIVE_DRV_FAKE_15_6, 23, 80, 1, FDRIVE_RATE_500K, "1.84 MB fake 15.6", },
+ { FDRIVE_DRV_FAKE_15_6, 24, 80, 1, FDRIVE_RATE_500K, "1.92 MB fake 15.6", },
+ { FDRIVE_DRV_FAKE_15_6, 9, 80, 1, FDRIVE_RATE_250K, "720 kB fake 15.6", },
+ { FDRIVE_DRV_FAKE_15_6, 10, 80, 1, FDRIVE_RATE_250K, "800 kB fake 15.6", },
+ { FDRIVE_DRV_FAKE_15_6, 10, 82, 1, FDRIVE_RATE_250K, "820 kB fake 15.6", },
+ { FDRIVE_DRV_FAKE_15_6, 10, 83, 1, FDRIVE_RATE_250K, "830 kB fake 15.6", },
+ { FDRIVE_DRV_FAKE_15_6, 13, 80, 1, FDRIVE_RATE_250K, "1.04 MB fake 15.6", },
+ { FDRIVE_DRV_FAKE_15_6, 14, 80, 1, FDRIVE_RATE_250K, "1.12 MB fake 15.6", },
+ { FDRIVE_DRV_FAKE_15_6, 9, 80, 0, FDRIVE_RATE_250K, "360 kB fake 15.6", },
+ /* 63.5 MB fake floppy disk (just need something big). */
+ { FDRIVE_DRV_FAKE_63_5, 255, 255, 1, FDRIVE_RATE_1M, "63.5 MB fake 63.5", },
+ { FDRIVE_DRV_FAKE_63_5, 63, 255, 1, FDRIVE_RATE_1M, "15.6 MB fake 63.5", },
+ { FDRIVE_DRV_FAKE_63_5, 36, 80, 1, FDRIVE_RATE_1M, "2.88 MB fake 63.5", },
+ { FDRIVE_DRV_FAKE_63_5, 39, 80, 1, FDRIVE_RATE_1M, "3.12 MB fake 63.5", },
+ { FDRIVE_DRV_FAKE_63_5, 40, 80, 1, FDRIVE_RATE_1M, "3.2 MB fake 63.5", },
+ { FDRIVE_DRV_FAKE_63_5, 44, 80, 1, FDRIVE_RATE_1M, "3.52 MB fake 63.5", },
+ { FDRIVE_DRV_FAKE_63_5, 48, 80, 1, FDRIVE_RATE_1M, "3.84 MB fake 63.5", },
+ { FDRIVE_DRV_FAKE_63_5, 18, 80, 1, FDRIVE_RATE_500K, "1.44 MB fake 63.5", },
+ { FDRIVE_DRV_FAKE_63_5, 20, 80, 1, FDRIVE_RATE_500K, "1.6 MB fake 63.5", },
+ { FDRIVE_DRV_FAKE_63_5, 21, 80, 1, FDRIVE_RATE_500K, "1.68 MB fake 63.5", },
+ { FDRIVE_DRV_FAKE_63_5, 21, 82, 1, FDRIVE_RATE_500K, "1.72 MB fake 63.5", },
+ { FDRIVE_DRV_FAKE_63_5, 21, 83, 1, FDRIVE_RATE_500K, "1.74 MB fake 63.5", },
+ { FDRIVE_DRV_FAKE_63_5, 22, 80, 1, FDRIVE_RATE_500K, "1.76 MB fake 63.5", },
+ { FDRIVE_DRV_FAKE_63_5, 23, 80, 1, FDRIVE_RATE_500K, "1.84 MB fake 63.5", },
+ { FDRIVE_DRV_FAKE_63_5, 24, 80, 1, FDRIVE_RATE_500K, "1.92 MB fake 63.5", },
+ { FDRIVE_DRV_FAKE_63_5, 9, 80, 1, FDRIVE_RATE_250K, "720 kB fake 63.5", },
+ { FDRIVE_DRV_FAKE_63_5, 10, 80, 1, FDRIVE_RATE_250K, "800 kB fake 63.5", },
+ { FDRIVE_DRV_FAKE_63_5, 10, 82, 1, FDRIVE_RATE_250K, "820 kB fake 63.5", },
+ { FDRIVE_DRV_FAKE_63_5, 10, 83, 1, FDRIVE_RATE_250K, "830 kB fake 63.5", },
+ { FDRIVE_DRV_FAKE_63_5, 13, 80, 1, FDRIVE_RATE_250K, "1.04 MB fake 63.5", },
+ { FDRIVE_DRV_FAKE_63_5, 14, 80, 1, FDRIVE_RATE_250K, "1.12 MB fake 63.5", },
+ { FDRIVE_DRV_FAKE_63_5, 9, 80, 0, FDRIVE_RATE_250K, "360 kB fake 63.5", },
+ /* end */
+ { FDRIVE_DRV_NONE, (uint8_t)-1, (uint8_t)-1, 0, (fdrive_rate_t)0, NULL, },
+};
+
+/* Revalidate a disk drive after a disk change */
+static void fd_revalidate(fdrive_t *drv)
+{
+ const fd_format_t *parse;
+ uint64_t nb_sectors, size;
+ int i, first_match, match;
+ int nb_heads, max_track, last_sect, ro;
+
+ FLOPPY_DPRINTF("revalidate\n");
+ if ( drv->pDrvMedia
+ && drv->pDrvMount
+ && drv->pDrvMount->pfnIsMounted (drv->pDrvMount)) {
+ ro = drv->pDrvMedia->pfnIsReadOnly (drv->pDrvMedia);
+ nb_heads = max_track = last_sect = 0;
+ if (nb_heads != 0 && max_track != 0 && last_sect != 0) {
+ FLOPPY_DPRINTF("User defined disk (%d %d %d)",
+ nb_heads - 1, max_track, last_sect);
+ } else {
+ uint64_t size2 = drv->pDrvMedia->pfnGetSize (drv->pDrvMedia);
+ nb_sectors = size2 / FD_SECTOR_LEN;
+ match = -1;
+ first_match = -1;
+ for (i = 0;; i++) {
+ parse = &fd_formats[i];
+ if (parse->drive == FDRIVE_DRV_NONE)
+ break;
+ if (drv->drive == parse->drive ||
+ drv->drive == FDRIVE_DRV_NONE) {
+ size = (parse->max_head + 1) * parse->max_track *
+ parse->last_sect;
+ if (nb_sectors == size) {
+ match = i;
+ break;
+ }
+ if (first_match == -1)
+ first_match = i;
+ }
+ }
+ if (match == -1) {
+ if (first_match == -1)
+ match = 1;
+ else
+ match = first_match;
+ parse = &fd_formats[match];
+ }
+ nb_heads = parse->max_head + 1;
+ max_track = parse->max_track;
+ last_sect = parse->last_sect;
+ drv->drive = parse->drive;
+ drv->media_rate = parse->rate;
+ FLOPPY_DPRINTF("%s floppy disk (%d h %d t %d s) %s\n", parse->str,
+ nb_heads, max_track, last_sect, ro ? "ro" : "rw");
+ LogRel(("FDC: %s floppy disk (%d h %d t %d s) %s\n", parse->str,
+ nb_heads, max_track, last_sect, ro ? "ro" : "rw"));
+ }
+ if (nb_heads == 1) {
+ drv->flags &= ~FDISK_DBL_SIDES;
+ } else {
+ drv->flags |= FDISK_DBL_SIDES;
+ }
+ drv->max_track = max_track;
+ drv->last_sect = last_sect;
+ drv->ro = ro;
+ } else {
+ FLOPPY_DPRINTF("No disk in drive\n");
+ drv->last_sect = 0;
+ drv->max_track = 0;
+ drv->flags &= ~FDISK_DBL_SIDES;
+ drv->dsk_chg = true; /* Disk change line active. */
+ }
+}
+
+/********************************************************/
+/* Intel 82078 floppy disk controller emulation */
+
+static void fdctrl_reset(fdctrl_t *fdctrl, int do_irq);
+static void fdctrl_reset_fifo(fdctrl_t *fdctrl);
+static fdrive_t *get_cur_drv(fdctrl_t *fdctrl);
+
+static uint32_t fdctrl_read_statusA(fdctrl_t *fdctrl);
+static uint32_t fdctrl_read_statusB(fdctrl_t *fdctrl);
+static uint32_t fdctrl_read_dor(fdctrl_t *fdctrl);
+static void fdctrl_write_dor(fdctrl_t *fdctrl, uint32_t value);
+static uint32_t fdctrl_read_tape(fdctrl_t *fdctrl);
+static void fdctrl_write_tape(fdctrl_t *fdctrl, uint32_t value);
+static uint32_t fdctrl_read_main_status(fdctrl_t *fdctrl);
+static void fdctrl_write_rate(fdctrl_t *fdctrl, uint32_t value);
+static uint32_t fdctrl_read_data(fdctrl_t *fdctrl);
+static void fdctrl_write_data(fdctrl_t *fdctrl, uint32_t value);
+static uint32_t fdctrl_read_dir(fdctrl_t *fdctrl);
+static void fdctrl_write_ccr(fdctrl_t *fdctrl, uint32_t value);
+
+enum {
+ FD_DIR_WRITE = 0,
+ FD_DIR_READ = 1,
+ FD_DIR_SCANE = 2,
+ FD_DIR_SCANL = 3,
+ FD_DIR_SCANH = 4,
+ FD_DIR_FORMAT = 5
+};
+
+enum {
+ FD_STATE_MULTI = 0x01, /* multi track flag */
+ FD_STATE_FORMAT = 0x02, /* format flag */
+ FD_STATE_SEEK = 0x04 /* seek flag */
+};
+
+enum {
+ FD_REG_SRA = 0x00,
+ FD_REG_SRB = 0x01,
+ FD_REG_DOR = 0x02,
+ FD_REG_TDR = 0x03,
+ FD_REG_MSR = 0x04,
+ FD_REG_DSR = 0x04,
+ FD_REG_FIFO = 0x05,
+ FD_REG_DIR = 0x07,
+ FD_REG_CCR = 0x07
+};
+
+enum {
+ FD_CMD_READ_TRACK = 0x02,
+ FD_CMD_SPECIFY = 0x03,
+ FD_CMD_SENSE_DRIVE_STATUS = 0x04,
+ FD_CMD_WRITE = 0x05,
+ FD_CMD_READ = 0x06,
+ FD_CMD_RECALIBRATE = 0x07,
+ FD_CMD_SENSE_INTERRUPT_STATUS = 0x08,
+ FD_CMD_WRITE_DELETED = 0x09,
+ FD_CMD_READ_ID = 0x0a,
+ FD_CMD_READ_DELETED = 0x0c,
+ FD_CMD_FORMAT_TRACK = 0x0d,
+ FD_CMD_DUMPREG = 0x0e,
+ FD_CMD_SEEK = 0x0f,
+ FD_CMD_VERSION = 0x10,
+ FD_CMD_SCAN_EQUAL = 0x11,
+ FD_CMD_PERPENDICULAR_MODE = 0x12,
+ FD_CMD_CONFIGURE = 0x13,
+ FD_CMD_LOCK = 0x14,
+ FD_CMD_VERIFY = 0x16,
+ FD_CMD_POWERDOWN_MODE = 0x17,
+ FD_CMD_PART_ID = 0x18,
+ FD_CMD_SCAN_LOW_OR_EQUAL = 0x19,
+ FD_CMD_SCAN_HIGH_OR_EQUAL = 0x1d,
+ FD_CMD_SAVE = 0x2e,
+ FD_CMD_OPTION = 0x33,
+ FD_CMD_RESTORE = 0x4e,
+ FD_CMD_DRIVE_SPECIFICATION_COMMAND = 0x8e,
+ FD_CMD_RELATIVE_SEEK_OUT = 0x8f,
+ FD_CMD_FORMAT_AND_WRITE = 0xcd,
+ FD_CMD_RELATIVE_SEEK_IN = 0xcf
+};
+
+enum {
+ FD_CONFIG_PRETRK = 0xff, /* Pre-compensation set to track 0 */
+ FD_CONFIG_FIFOTHR = 0x0f, /* FIFO threshold set to 1 byte */
+ FD_CONFIG_POLL = 0x10, /* Poll enabled */
+ FD_CONFIG_EFIFO = 0x20, /* FIFO disabled */
+ FD_CONFIG_EIS = 0x40 /* No implied seeks */
+};
+
+enum {
+ FD_SR0_EQPMT = 0x10,
+ FD_SR0_SEEK = 0x20,
+ FD_SR0_ABNTERM = 0x40,
+ FD_SR0_INVCMD = 0x80,
+ FD_SR0_RDYCHG = 0xc0
+};
+
+enum {
+ FD_SR1_MA = 0x01, /* Missing address mark */
+ FD_SR1_NW = 0x02, /* Not writable */
+ FD_SR1_ND = 0x04, /* No data */
+ FD_SR1_EC = 0x80 /* End of cylinder */
+};
+
+enum {
+ FD_SR2_MD = 0x01, /* Missing data address mark */
+ FD_SR2_SNS = 0x04, /* Scan not satisfied */
+ FD_SR2_SEH = 0x08 /* Scan equal hit */
+};
+
+enum {
+ FD_SRA_DIR = 0x01,
+ FD_SRA_nWP = 0x02,
+ FD_SRA_nINDX = 0x04,
+ FD_SRA_HDSEL = 0x08,
+ FD_SRA_nTRK0 = 0x10,
+ FD_SRA_STEP = 0x20,
+ FD_SRA_nDRV2 = 0x40,
+ FD_SRA_INTPEND = 0x80
+};
+
+enum {
+ FD_SRB_MTR0 = 0x01,
+ FD_SRB_MTR1 = 0x02,
+ FD_SRB_WGATE = 0x04,
+ FD_SRB_RDATA = 0x08,
+ FD_SRB_WDATA = 0x10,
+ FD_SRB_DR0 = 0x20
+};
+
+enum {
+#if MAX_FD == 4
+ FD_DRV_SELMASK = 0x03,
+#else
+ FD_DRV_SELMASK = 0x01,
+#endif
+};
+
+enum {
+ FD_DOR_SELMASK = 0x03, /* Always two bits regardless of FD_DRV_SELMASK. */
+ FD_DOR_nRESET = 0x04,
+ FD_DOR_DMAEN = 0x08,
+ FD_DOR_MOTEN0 = 0x10,
+ FD_DOR_MOTEN1 = 0x20,
+ FD_DOR_MOTEN2 = 0x40,
+ FD_DOR_MOTEN3 = 0x80
+};
+
+enum {
+#if MAX_FD == 4
+ FD_TDR_BOOTSEL = 0x0c
+#else
+ FD_TDR_BOOTSEL = 0x04
+#endif
+};
+
+enum {
+ FD_DSR_DRATEMASK= 0x03,
+ FD_DSR_PWRDOWN = 0x40,
+ FD_DSR_SWRESET = 0x80
+};
+
+enum {
+ FD_MSR_DRV0BUSY = 0x01,
+ FD_MSR_DRV1BUSY = 0x02,
+ FD_MSR_DRV2BUSY = 0x04,
+ FD_MSR_DRV3BUSY = 0x08,
+ FD_MSR_CMDBUSY = 0x10,
+ FD_MSR_NONDMA = 0x20,
+ FD_MSR_DIO = 0x40,
+ FD_MSR_RQM = 0x80
+};
+
+enum {
+ FD_DIR_DSKCHG = 0x80
+};
+
+#define FD_MULTI_TRACK(state) ((state) & FD_STATE_MULTI)
+#define FD_DID_SEEK(state) ((state) & FD_STATE_SEEK)
+#define FD_FORMAT_CMD(state) ((state) & FD_STATE_FORMAT)
+
+/**
+ * Floppy controller state.
+ *
+ * @implements PDMILEDPORTS
+ */
+struct fdctrl_t {
+ /* Controller's identification */
+ uint8_t version;
+ /* HW */
+ uint8_t irq_lvl;
+ uint8_t dma_chann;
+ uint16_t io_base;
+ /* Controller state */
+ TMTIMERHANDLE hResultTimer;
+
+ /* Interrupt delay timers. */
+ TMTIMERHANDLE hXferDelayTimer;
+ TMTIMERHANDLE hIrqDelayTimer;
+ uint16_t uIrqDelayMsec;
+ uint8_t st0;
+ uint8_t st1;
+ uint8_t st2;
+
+ uint8_t sra;
+ uint8_t srb;
+ uint8_t dor;
+ uint8_t tdr;
+ uint8_t dsr;
+ uint8_t msr;
+ uint8_t cur_drv;
+ uint8_t status0;
+ uint8_t status1;
+ uint8_t status2;
+ /* Command FIFO */
+ uint8_t fifo[FD_SECTOR_LEN];
+ uint32_t data_pos;
+ uint32_t data_len;
+ uint8_t data_state;
+ uint8_t data_dir;
+ uint8_t eot; /* last wanted sector */
+ /* Debugging only */
+ uint8_t cur_cmd;
+ uint8_t prev_cmd;
+ /* States kept only to be returned back */
+ /* Timers state */
+ uint8_t timer0;
+ uint8_t timer1;
+ /* precompensation */
+ uint8_t precomp_trk;
+ uint8_t config;
+ uint8_t lock;
+ /* Power down config (also with status regB access mode */
+ uint8_t pwrd;
+ /* Floppy drives */
+ uint8_t num_floppies;
+ fdrive_t drives[MAX_FD];
+ uint8_t reset_sensei;
+ /** Pointer to device instance. */
+ PPDMDEVINS pDevIns;
+
+ /** Status LUN: The base interface. */
+ PDMIBASE IBaseStatus;
+ /** Status LUN: The Leds interface. */
+ PDMILEDPORTS ILeds;
+ /** Status LUN: The Partner of ILeds. */
+ PPDMILEDCONNECTORS pLedsConnector;
+
+ /** I/O ports: 0x3f0 */
+ IOMIOPORTHANDLE hIoPorts0;
+ /** I/O ports: 0x3f1..0x3f5 */
+ IOMIOPORTHANDLE hIoPorts1;
+ /** I/O port: 0x3f7 */
+ IOMIOPORTHANDLE hIoPorts2;
+};
+
+static uint32_t fdctrl_read (fdctrl_t *fdctrl, uint32_t reg)
+{
+ uint32_t retval;
+
+ switch (reg) {
+ case FD_REG_SRA:
+ retval = fdctrl_read_statusA(fdctrl);
+ break;
+ case FD_REG_SRB:
+ retval = fdctrl_read_statusB(fdctrl);
+ break;
+ case FD_REG_DOR:
+ retval = fdctrl_read_dor(fdctrl);
+ break;
+ case FD_REG_TDR:
+ retval = fdctrl_read_tape(fdctrl);
+ break;
+ case FD_REG_MSR:
+ retval = fdctrl_read_main_status(fdctrl);
+ break;
+ case FD_REG_FIFO:
+ retval = fdctrl_read_data(fdctrl);
+ break;
+ case FD_REG_DIR:
+ retval = fdctrl_read_dir(fdctrl);
+ break;
+ default:
+ retval = UINT32_MAX;
+ break;
+ }
+ FLOPPY_DPRINTF("read reg%d: 0x%02x\n", reg & 7, retval);
+
+ return retval;
+}
+
+static void fdctrl_write (fdctrl_t *fdctrl, uint32_t reg, uint32_t value)
+{
+ FLOPPY_DPRINTF("write reg%d: 0x%02x\n", reg & 7, value);
+
+ switch (reg) {
+ case FD_REG_DOR:
+ fdctrl_write_dor(fdctrl, value);
+ break;
+ case FD_REG_TDR:
+ fdctrl_write_tape(fdctrl, value);
+ break;
+ case FD_REG_DSR:
+ fdctrl_write_rate(fdctrl, value);
+ break;
+ case FD_REG_FIFO:
+ fdctrl_write_data(fdctrl, value);
+ break;
+ case FD_REG_CCR:
+ fdctrl_write_ccr(fdctrl, value);
+ break;
+ default:
+ break;
+ }
+}
+
+/* Change IRQ state */
+static void fdctrl_reset_irq(fdctrl_t *fdctrl)
+{
+ if (!(fdctrl->sra & FD_SRA_INTPEND))
+ return;
+ FLOPPY_DPRINTF("Reset interrupt\n");
+ PDMDevHlpISASetIrq (fdctrl->pDevIns, fdctrl->irq_lvl, 0);
+ fdctrl->sra &= ~FD_SRA_INTPEND;
+}
+
+static void fdctrl_raise_irq_now(fdctrl_t *fdctrl, uint8_t status0)
+{
+ if (!(fdctrl->sra & FD_SRA_INTPEND)) {
+ FLOPPY_DPRINTF("Raising interrupt...\n");
+ PDMDevHlpISASetIrq (fdctrl->pDevIns, fdctrl->irq_lvl, 1);
+ fdctrl->sra |= FD_SRA_INTPEND;
+ }
+ if (status0 & FD_SR0_SEEK) {
+ fdrive_t *cur_drv;
+
+ /* A seek clears the disk change line (if a disk is inserted). */
+ cur_drv = get_cur_drv(fdctrl);
+ if (cur_drv->max_track)
+ cur_drv->dsk_chg = false;
+ }
+
+ fdctrl->reset_sensei = 0;
+ fdctrl->status0 = status0;
+ FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", fdctrl->status0);
+}
+
+static void fdctrl_raise_irq(fdctrl_t *fdctrl, uint8_t status0)
+{
+ if (!fdctrl->uIrqDelayMsec)
+ {
+ /* If not IRQ delay needed, trigger the interrupt now. */
+ fdctrl_raise_irq_now(fdctrl, status0);
+ }
+ else
+ {
+ /* Otherwise schedule completion after a short while. */
+ fdctrl->st0 = status0;
+ PDMDevHlpTimerSetMillies(fdctrl->pDevIns, fdctrl->hIrqDelayTimer, fdctrl->uIrqDelayMsec);
+ }
+}
+
+/* Reset controller */
+static void fdctrl_reset(fdctrl_t *fdctrl, int do_irq)
+{
+ int i;
+
+ FLOPPY_DPRINTF("reset controller\n");
+ fdctrl_reset_irq(fdctrl);
+ /* Initialise controller */
+ fdctrl->sra = 0;
+ fdctrl->srb = 0xc0;
+ if (!fdctrl->drives[1].pDrvMedia)
+ fdctrl->sra |= FD_SRA_nDRV2;
+ fdctrl->cur_drv = 0;
+ fdctrl->dor = FD_DOR_nRESET;
+ fdctrl->dor |= (fdctrl->dma_chann != 0xff) ? FD_DOR_DMAEN : 0;
+ fdctrl->msr = FD_MSR_RQM;
+ /* FIFO state */
+ fdctrl->data_pos = 0;
+ fdctrl->data_len = 0;
+ fdctrl->data_state = 0;
+ fdctrl->data_dir = FD_DIR_WRITE;
+ for (i = 0; i < MAX_FD; i++)
+ fd_recalibrate(&fdctrl->drives[i]);
+ fdctrl_reset_fifo(fdctrl);
+ if (do_irq) {
+ fdctrl_raise_irq(fdctrl, FD_SR0_RDYCHG);
+ fdctrl->reset_sensei = FD_RESET_SENSEI_COUNT;
+ }
+}
+
+static inline fdrive_t *drv0(fdctrl_t *fdctrl)
+{
+ return &fdctrl->drives[(fdctrl->tdr & FD_TDR_BOOTSEL) >> 2];
+}
+
+static inline fdrive_t *drv1(fdctrl_t *fdctrl)
+{
+ if ((fdctrl->tdr & FD_TDR_BOOTSEL) < (1 << 2))
+ return &fdctrl->drives[1];
+ else
+ return &fdctrl->drives[0];
+}
+
+#if MAX_FD == 4
+static inline fdrive_t *drv2(fdctrl_t *fdctrl)
+{
+ if ((fdctrl->tdr & FD_TDR_BOOTSEL) < (2 << 2))
+ return &fdctrl->drives[2];
+ else
+ return &fdctrl->drives[1];
+}
+
+static inline fdrive_t *drv3(fdctrl_t *fdctrl)
+{
+ if ((fdctrl->tdr & FD_TDR_BOOTSEL) < (3 << 2))
+ return &fdctrl->drives[3];
+ else
+ return &fdctrl->drives[2];
+}
+#endif
+
+static fdrive_t *get_cur_drv(fdctrl_t *fdctrl)
+{
+ switch (fdctrl->dor & FD_DRV_SELMASK) {
+ case 0: return drv0(fdctrl);
+ case 1: return drv1(fdctrl);
+#if MAX_FD == 4
+ case 2: return drv2(fdctrl);
+ case 3: return drv3(fdctrl);
+#endif
+ default: return NULL;
+ }
+}
+
+/* Status A register : 0x00 (read-only) */
+static uint32_t fdctrl_read_statusA(fdctrl_t *fdctrl)
+{
+ uint32_t retval = fdctrl->sra;
+
+ FLOPPY_DPRINTF("status register A: 0x%02x\n", retval);
+
+ return retval;
+}
+
+/* Status B register : 0x01 (read-only) */
+static uint32_t fdctrl_read_statusB(fdctrl_t *fdctrl)
+{
+ uint32_t retval = fdctrl->srb;
+
+ FLOPPY_DPRINTF("status register B: 0x%02x\n", retval);
+
+ return retval;
+}
+
+/* Digital output register : 0x02 */
+static uint32_t fdctrl_read_dor(fdctrl_t *fdctrl)
+{
+ uint32_t retval = fdctrl->dor;
+
+ FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval);
+
+ return retval;
+}
+
+static void fdctrl_write_dor(fdctrl_t *fdctrl, uint32_t value)
+{
+ FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value);
+
+ /* Motors */
+ if (value & FD_DOR_MOTEN0)
+ fdctrl->srb |= FD_SRB_MTR0;
+ else
+ fdctrl->srb &= ~FD_SRB_MTR0;
+ if (value & FD_DOR_MOTEN1)
+ fdctrl->srb |= FD_SRB_MTR1;
+ else
+ fdctrl->srb &= ~FD_SRB_MTR1;
+
+ /* Drive */
+ if (value & 1)
+ fdctrl->srb |= FD_SRB_DR0;
+ else
+ fdctrl->srb &= ~FD_SRB_DR0;
+
+ /* Reset */
+ if (!(value & FD_DOR_nRESET)) {
+ if (fdctrl->dor & FD_DOR_nRESET) {
+ FLOPPY_DPRINTF("controller enter RESET state\n");
+ }
+ } else {
+ if (!(fdctrl->dor & FD_DOR_nRESET)) {
+ FLOPPY_DPRINTF("controller out of RESET state\n");
+ fdctrl_reset(fdctrl, 1);
+ fdctrl->dsr &= ~FD_DSR_PWRDOWN;
+ }
+ }
+
+ fdctrl->dor = value;
+}
+
+/* Tape drive register : 0x03 */
+static uint32_t fdctrl_read_tape(fdctrl_t *fdctrl)
+{
+ uint32_t retval = fdctrl->tdr;
+
+ FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval);
+
+ return retval;
+}
+
+static void fdctrl_write_tape(fdctrl_t *fdctrl, uint32_t value)
+{
+ /* Reset mode */
+ if (!(fdctrl->dor & FD_DOR_nRESET)) {
+ FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
+ return;
+ }
+ FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value);
+ /* Disk boot selection indicator */
+ fdctrl->tdr = value & FD_TDR_BOOTSEL;
+ /* Tape indicators: never allow */
+}
+
+/* Main status register : 0x04 (read) */
+static uint32_t fdctrl_read_main_status(fdctrl_t *fdctrl)
+{
+ uint32_t retval = fdctrl->msr;
+
+ fdctrl->dsr &= ~FD_DSR_PWRDOWN;
+ fdctrl->dor |= FD_DOR_nRESET;
+
+ FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
+
+ return retval;
+}
+
+/* Data select rate register : 0x04 (write) */
+static void fdctrl_write_rate(fdctrl_t *fdctrl, uint32_t value)
+{
+ /* Reset mode */
+ if (!(fdctrl->dor & FD_DOR_nRESET)) {
+ FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
+ return;
+ }
+ FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value);
+ /* Reset: autoclear */
+ if (value & FD_DSR_SWRESET) {
+ fdctrl->dor &= ~FD_DOR_nRESET;
+ fdctrl_reset(fdctrl, 1);
+ fdctrl->dor |= FD_DOR_nRESET;
+ }
+ if (value & FD_DSR_PWRDOWN) {
+ fdctrl_reset(fdctrl, 1);
+ }
+ fdctrl->dsr = value;
+}
+
+/* Configuration control register : 0x07 (write) */
+static void fdctrl_write_ccr(fdctrl_t *fdctrl, uint32_t value)
+{
+ /* Reset mode */
+ if (!(fdctrl->dor & FD_DOR_nRESET)) {
+ FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
+ return;
+ }
+ FLOPPY_DPRINTF("configuration control register set to 0x%02x\n", value);
+
+ /* Only the rate selection bits used in AT mode, and we
+ * store those in the DSR.
+ */
+ fdctrl->dsr = (fdctrl->dsr & ~FD_DSR_DRATEMASK) | (value & FD_DSR_DRATEMASK);
+}
+
+static int fdctrl_media_changed(fdrive_t *drv)
+{
+ return drv->dsk_chg;
+}
+
+/* Digital input register : 0x07 (read-only) */
+static uint32_t fdctrl_read_dir(fdctrl_t *fdctrl)
+{
+ uint32_t retval = 0;
+
+ /* The change line signal is reported by the currently selected
+ * drive. If the corresponding motor on bit is not set, the drive
+ * is *not* selected!
+ */
+ if (fdctrl_media_changed(get_cur_drv(fdctrl))
+ && (fdctrl->dor & (0x10 << (fdctrl->dor & FD_DOR_SELMASK))))
+ retval |= FD_DIR_DSKCHG;
+ if (retval != 0)
+ FLOPPY_DPRINTF("Floppy digital input register: 0x%02x\n", retval);
+
+ return retval;
+}
+
+/* FIFO state control */
+static void fdctrl_reset_fifo(fdctrl_t *fdctrl)
+{
+ fdctrl->data_dir = FD_DIR_WRITE;
+ fdctrl->data_pos = 0;
+ fdctrl->msr &= ~(FD_MSR_CMDBUSY | FD_MSR_DIO);
+ fdctrl->prev_cmd = fdctrl->cur_cmd;
+ fdctrl->cur_cmd = 0;
+}
+
+/* Set FIFO status for the host to read */
+static void fdctrl_set_fifo(fdctrl_t *fdctrl, int fifo_len, int do_irq)
+{
+ fdctrl->data_dir = FD_DIR_READ;
+ fdctrl->data_len = fifo_len;
+ fdctrl->data_pos = 0;
+ fdctrl->msr |= FD_MSR_CMDBUSY | FD_MSR_RQM | FD_MSR_DIO;
+ if (do_irq)
+ fdctrl_raise_irq(fdctrl, 0x00);
+}
+
+/* Set an error: unimplemented/unknown command */
+static void fdctrl_unimplemented(fdctrl_t *fdctrl, int direction)
+{
+ RT_NOREF(direction);
+ FLOPPY_ERROR("unimplemented command 0x%02x\n", fdctrl->fifo[0]);
+ fdctrl->fifo[0] = FD_SR0_INVCMD;
+ fdctrl_set_fifo(fdctrl, 1, 0);
+}
+
+/* Seek to next sector */
+static int fdctrl_seek_to_next_sect(fdctrl_t *fdctrl, fdrive_t *cur_drv)
+{
+ FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d)\n",
+ cur_drv->head, cur_drv->track, cur_drv->sect,
+ fd_sector(cur_drv));
+ /* XXX: cur_drv->sect >= cur_drv->last_sect should be an
+ error in fact */
+ if (cur_drv->sect >= cur_drv->last_sect ||
+ cur_drv->sect == fdctrl->eot) {
+ cur_drv->sect = 1;
+ if (FD_MULTI_TRACK(fdctrl->data_state)) {
+ if (cur_drv->head == 0 &&
+ (cur_drv->flags & FDISK_DBL_SIDES) != 0) {
+ cur_drv->head = 1;
+ } else {
+ cur_drv->head = 0;
+ cur_drv->ltrk++;
+ if ((cur_drv->flags & FDISK_DBL_SIDES) == 0)
+ return 0;
+ }
+ } else {
+ cur_drv->ltrk++;
+ return 0;
+ }
+ FLOPPY_DPRINTF("seek to next track (%d %02x %02x => %d)\n",
+ cur_drv->head, cur_drv->track,
+ cur_drv->sect, fd_sector(cur_drv));
+ } else {
+ cur_drv->sect++;
+ }
+ return 1;
+}
+
+/* Callback for transfer end (stop or abort) */
+static void fdctrl_stop_transfer_now(fdctrl_t *fdctrl, uint8_t status0,
+ uint8_t status1, uint8_t status2)
+{
+ fdrive_t *cur_drv;
+
+ cur_drv = get_cur_drv(fdctrl);
+ FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
+ status0, status1, status2,
+ status0 | (cur_drv->head << 2) | GET_CUR_DRV(fdctrl));
+ fdctrl->fifo[0] = status0 | (cur_drv->head << 2) | GET_CUR_DRV(fdctrl);
+ fdctrl->fifo[1] = status1;
+ fdctrl->fifo[2] = status2;
+ fdctrl->fifo[3] = cur_drv->ltrk;
+ fdctrl->fifo[4] = cur_drv->head;
+ fdctrl->fifo[5] = cur_drv->sect;
+ fdctrl->fifo[6] = FD_SECTOR_SC;
+ FLOPPY_DPRINTF("ST0:%02x ST1:%02x ST2:%02x C:%02x H:%02x R:%02x N:%02x\n",
+ fdctrl->fifo[0], fdctrl->fifo[1], fdctrl->fifo[2], fdctrl->fifo[3],
+ fdctrl->fifo[4], fdctrl->fifo[5], fdctrl->fifo[6]);
+
+ fdctrl->data_dir = FD_DIR_READ;
+ if (!(fdctrl->msr & FD_MSR_NONDMA)) {
+ PDMDevHlpDMASetDREQ (fdctrl->pDevIns, fdctrl->dma_chann, 0);
+ }
+ fdctrl->msr |= FD_MSR_RQM | FD_MSR_DIO;
+ fdctrl->msr &= ~FD_MSR_NONDMA;
+ fdctrl_set_fifo(fdctrl, 7, 1);
+}
+
+static void fdctrl_stop_transfer(fdctrl_t *fdctrl, uint8_t status0,
+ uint8_t status1, uint8_t status2)
+{
+ if (!fdctrl->uIrqDelayMsec)
+ {
+ /* If not IRQ delay needed, just stop the transfer and trigger IRQ now. */
+ fdctrl_stop_transfer_now(fdctrl, status0, status1, status2);
+ }
+ else
+ {
+ /* Otherwise schedule completion after a short while. */
+ fdctrl->st0 = status0;
+ fdctrl->st1 = status1;
+ fdctrl->st2 = status2;
+ PDMDevHlpTimerSetMillies(fdctrl->pDevIns, fdctrl->hXferDelayTimer, fdctrl->uIrqDelayMsec);
+ }
+}
+
+/* Prepare a data transfer (either DMA or FIFO) */
+static void fdctrl_start_transfer(fdctrl_t *fdctrl, int direction)
+{
+ fdrive_t *cur_drv;
+ uint8_t kh, kt, ks;
+ int did_seek = 0;
+
+ SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
+ cur_drv = get_cur_drv(fdctrl);
+ kt = fdctrl->fifo[2];
+ kh = fdctrl->fifo[3];
+ ks = fdctrl->fifo[4];
+ FLOPPY_DPRINTF("Start transfer at %d %d %02x %02x (%d)\n",
+ GET_CUR_DRV(fdctrl), kh, kt, ks,
+ fd_sector_calc(kh, kt, ks, cur_drv->last_sect, NUM_SIDES(cur_drv)));
+ FLOPPY_DPRINTF("CMD:%02x SEL:%02x C:%02x H:%02x R:%02x N:%02x EOT:%02x GPL:%02x DTL:%02x\n",
+ fdctrl->fifo[0], fdctrl->fifo[1], fdctrl->fifo[2],
+ fdctrl->fifo[3], fdctrl->fifo[4], fdctrl->fifo[5],
+ fdctrl->fifo[6], fdctrl->fifo[7], fdctrl->fifo[8]);
+ switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & FD_CONFIG_EIS)) {
+ case 2:
+ /* sect too big */
+ fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
+ fdctrl->fifo[3] = kt;
+ fdctrl->fifo[4] = kh;
+ fdctrl->fifo[5] = ks;
+ return;
+ case 3:
+ /* track too big */
+ fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_EC, 0x00);
+ fdctrl->fifo[3] = kt;
+ fdctrl->fifo[4] = kh;
+ fdctrl->fifo[5] = ks;
+ return;
+ case 4:
+ /* No seek enabled */
+ fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
+ fdctrl->fifo[3] = kt;
+ fdctrl->fifo[4] = kh;
+ fdctrl->fifo[5] = ks;
+ return;
+ case 5:
+ /* No disk in drive */
+ /// @todo This is wrong! Command should not complete.
+ fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | 0x08, /*FD_SR1_MA |*/ FD_SR1_ND, 0x00);
+ fdctrl->fifo[3] = kt;
+ fdctrl->fifo[4] = kh;
+ fdctrl->fifo[5] = ks;
+ return;
+ case 1:
+ did_seek = 1;
+ break;
+ default:
+ break;
+ }
+ /* Check the data rate. If the programmed data rate does not match
+ * the currently inserted medium, the operation has to fail.
+ */
+ if ((fdctrl->dsr & FD_DSR_DRATEMASK) != cur_drv->media_rate) {
+ FLOPPY_DPRINTF("data rate mismatch (fdc=%d, media=%d)\n",
+ fdctrl->dsr & FD_DSR_DRATEMASK, cur_drv->media_rate);
+ fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA, FD_SR2_MD);
+ fdctrl->fifo[3] = kt;
+ fdctrl->fifo[4] = kh;
+ fdctrl->fifo[5] = ks;
+ return;
+ }
+ /* Set the FIFO state */
+ fdctrl->data_dir = direction;
+ fdctrl->data_pos = 0;
+ fdctrl->msr |= FD_MSR_CMDBUSY;
+ if (fdctrl->fifo[0] & 0x80)
+ fdctrl->data_state |= FD_STATE_MULTI;
+ else
+ fdctrl->data_state &= ~FD_STATE_MULTI;
+ if (did_seek)
+ fdctrl->data_state |= FD_STATE_SEEK;
+ else
+ fdctrl->data_state &= ~FD_STATE_SEEK;
+ if (fdctrl->fifo[5] == 00) {
+ fdctrl->data_len = fdctrl->fifo[8];
+ } else {
+ int tmp;
+ fdctrl->data_len = 128 << (fdctrl->fifo[5] > 7 ? 7 : fdctrl->fifo[5]);
+ tmp = (fdctrl->fifo[6] - ks + 1);
+ if (fdctrl->fifo[0] & 0x80)
+ tmp += fdctrl->fifo[6];
+ fdctrl->data_len *= tmp;
+ }
+ fdctrl->eot = fdctrl->fifo[6];
+ if (fdctrl->dor & FD_DOR_DMAEN) {
+ int dma_mode;
+ /* DMA transfer are enabled. Check if DMA channel is well programmed */
+ dma_mode = PDMDevHlpDMAGetChannelMode (fdctrl->pDevIns, fdctrl->dma_chann);
+ dma_mode = (dma_mode >> 2) & 3;
+ FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n",
+ dma_mode, direction,
+ (128 << fdctrl->fifo[5]) *
+ (cur_drv->last_sect - ks + 1), fdctrl->data_len);
+ if (((direction == FD_DIR_SCANE || direction == FD_DIR_SCANL ||
+ direction == FD_DIR_SCANH) && dma_mode == 0) ||
+ (direction == FD_DIR_WRITE && dma_mode == 2) ||
+ (direction == FD_DIR_READ && (dma_mode == 1 || dma_mode == 0))) {
+ /* No access is allowed until DMA transfer has completed */
+ fdctrl->msr &= ~FD_MSR_RQM;
+ /* Now, we just have to wait for the DMA controller to
+ * recall us...
+ */
+ PDMDevHlpDMASetDREQ (fdctrl->pDevIns, fdctrl->dma_chann, 1);
+ PDMDevHlpDMASchedule (fdctrl->pDevIns);
+ return;
+ } else {
+ FLOPPY_ERROR("dma_mode=%d direction=%d\n", dma_mode, direction);
+ }
+ }
+ FLOPPY_DPRINTF("start non-DMA transfer\n");
+ fdctrl->msr |= FD_MSR_NONDMA;
+ if (direction != FD_DIR_WRITE)
+ fdctrl->msr |= FD_MSR_DIO;
+
+ /* IO based transfer: calculate len */
+ fdctrl_raise_irq(fdctrl, 0x00);
+ return;
+}
+
+/* Prepare a format data transfer (either DMA or FIFO) */
+static void fdctrl_start_format(fdctrl_t *fdctrl)
+{
+ fdrive_t *cur_drv;
+ uint8_t ns, dp, kh, kt, ks;
+
+ SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
+ cur_drv = get_cur_drv(fdctrl);
+ kt = cur_drv->track;
+ kh = (fdctrl->fifo[1] & 0x04) >> 2;
+ ns = fdctrl->fifo[3];
+ dp = fdctrl->fifo[5];
+ ks = 1;
+ FLOPPY_DPRINTF("Start format at %d %d %02x, %d sect, pat %02x (%d)\n",
+ GET_CUR_DRV(fdctrl), kh, kt, ns, dp,
+ fd_sector_calc(kh, kt, ks, cur_drv->last_sect, NUM_SIDES(cur_drv)));
+ switch (fd_seek(cur_drv, kh, kt, ks, false)) {
+ case 2:
+ /* sect too big */
+ fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
+ fdctrl->fifo[3] = kt;
+ fdctrl->fifo[4] = kh;
+ fdctrl->fifo[5] = ks;
+ return;
+ case 3:
+ /* track too big */
+ fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_EC, 0x00);
+ fdctrl->fifo[3] = kt;
+ fdctrl->fifo[4] = kh;
+ fdctrl->fifo[5] = ks;
+ return;
+ case 4:
+ /* No seek enabled */
+ fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
+ fdctrl->fifo[3] = kt;
+ fdctrl->fifo[4] = kh;
+ fdctrl->fifo[5] = ks;
+ return;
+ case 5:
+ /* No disk in drive */
+ fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA, 0x00);
+ fdctrl->fifo[3] = kt;
+ fdctrl->fifo[4] = kh;
+ fdctrl->fifo[5] = ks;
+ return;
+ case 1:
+ break;
+ default:
+ break;
+ }
+ /* It's not clear what should happen if the data rate does not match. */
+#if 0
+ /* Check the data rate. If the programmed data rate does not match
+ * the currently inserted medium, the operation has to fail.
+ */
+ if ((fdctrl->dsr & FD_DSR_DRATEMASK) != cur_drv->media_rate) {
+ FLOPPY_DPRINTF("data rate mismatch (fdc=%d, media=%d)\n",
+ fdctrl->dsr & FD_DSR_DRATEMASK, cur_drv->media_rate);
+ fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA, FD_SR2_MD);
+ fdctrl->fifo[3] = kt;
+ fdctrl->fifo[4] = kh;
+ fdctrl->fifo[5] = ks;
+ return;
+ }
+#endif
+ /* Set the FIFO state */
+ fdctrl->data_dir = FD_DIR_FORMAT;
+ fdctrl->data_pos = 0;
+ fdctrl->msr |= FD_MSR_CMDBUSY;
+ fdctrl->data_state &= ~(FD_STATE_MULTI | FD_STATE_SEEK);
+ fdctrl->data_len = ns * 4;
+ fdctrl->eot = ns;
+ if (fdctrl->dor & FD_DOR_DMAEN) {
+ int dma_mode;
+ /* DMA transfer are enabled. Check if DMA channel is well programmed */
+ dma_mode = PDMDevHlpDMAGetChannelMode (fdctrl->pDevIns, fdctrl->dma_chann);
+ dma_mode = (dma_mode >> 2) & 3;
+ FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n",
+ dma_mode, fdctrl->data_dir,
+ (128 << fdctrl->fifo[2]) *
+ (cur_drv->last_sect + 1), fdctrl->data_len);
+ if (fdctrl->data_dir == FD_DIR_FORMAT && dma_mode == 2) {
+ /* No access is allowed until DMA transfer has completed */
+ fdctrl->msr &= ~FD_MSR_RQM;
+ /* Now, we just have to wait for the DMA controller to
+ * recall us...
+ */
+ PDMDevHlpDMASetDREQ (fdctrl->pDevIns, fdctrl->dma_chann, 1);
+ PDMDevHlpDMASchedule (fdctrl->pDevIns);
+ return;
+ } else {
+ FLOPPY_ERROR("dma_mode=%d direction=%d\n", dma_mode, fdctrl->data_dir);
+ }
+ }
+ FLOPPY_DPRINTF("start non-DMA format\n");
+ fdctrl->msr |= FD_MSR_NONDMA;
+ /* IO based transfer: calculate len */
+ fdctrl_raise_irq(fdctrl, 0x00);
+
+ return;
+}
+
+/* Prepare a transfer of deleted data */
+static void fdctrl_start_transfer_del(fdctrl_t *fdctrl, int direction)
+{
+ RT_NOREF(direction);
+ FLOPPY_ERROR("fdctrl_start_transfer_del() unimplemented\n");
+
+ /* We don't handle deleted data,
+ * so we don't return *ANYTHING*
+ */
+ fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00);
+}
+
+/* Block driver read/write wrappers. */
+
+static int blk_write(fdrive_t *drv, int64_t sector_num, const uint8_t *buf, int nb_sectors)
+{
+ int rc;
+
+ drv->Led.Asserted.s.fWriting = drv->Led.Actual.s.fWriting = 1;
+
+ rc = drv->pDrvMedia->pfnWrite(drv->pDrvMedia, sector_num * FD_SECTOR_LEN,
+ buf, nb_sectors * FD_SECTOR_LEN);
+
+ drv->Led.Actual.s.fWriting = 0;
+ if (RT_FAILURE(rc))
+ AssertMsgFailed(("Floppy: Failure to read sector %d. rc=%Rrc", sector_num, rc));
+
+ return rc;
+}
+
+static int blk_read(fdrive_t *drv, int64_t sector_num, uint8_t *buf, int nb_sectors)
+{
+ int rc;
+
+ drv->Led.Asserted.s.fReading = drv->Led.Actual.s.fReading = 1;
+
+ rc = drv->pDrvMedia->pfnRead(drv->pDrvMedia, sector_num * FD_SECTOR_LEN,
+ buf, nb_sectors * FD_SECTOR_LEN);
+
+ drv->Led.Actual.s.fReading = 0;
+
+ if (RT_FAILURE(rc))
+ AssertMsgFailed(("Floppy: Failure to read sector %d. rc=%Rrc", sector_num, rc));
+
+ return rc;
+}
+
+/**
+ * @callback_method_impl{FNDMATRANSFERHANDLER, handlers for DMA transfers}
+ */
+static DECLCALLBACK(uint32_t) fdctrl_transfer_handler(PPDMDEVINS pDevIns, void *pvUser,
+ unsigned uChannel, uint32_t off, uint32_t cb)
+{
+ RT_NOREF(pDevIns, off);
+ fdctrl_t *fdctrl;
+ fdrive_t *cur_drv;
+ int rc;
+ uint32_t len = 0;
+ uint32_t start_pos, rel_pos;
+ uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00;
+
+ fdctrl = (fdctrl_t *)pvUser;
+ if (fdctrl->msr & FD_MSR_RQM) {
+ FLOPPY_DPRINTF("Not in DMA transfer mode !\n");
+ return 0;
+ }
+ cur_drv = get_cur_drv(fdctrl);
+ if (fdctrl->data_dir == FD_DIR_SCANE || fdctrl->data_dir == FD_DIR_SCANL ||
+ fdctrl->data_dir == FD_DIR_SCANH)
+ status2 = FD_SR2_SNS;
+ if (cb > fdctrl->data_len)
+ cb = fdctrl->data_len;
+ if (cur_drv->pDrvMedia == NULL)
+ {
+ if (fdctrl->data_dir == FD_DIR_WRITE)
+ fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00);
+ else
+ fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
+ Assert(len == 0);
+ goto transfer_error;
+ }
+
+ if (cur_drv->ro)
+ {
+ if (fdctrl->data_dir == FD_DIR_WRITE || fdctrl->data_dir == FD_DIR_FORMAT)
+ {
+ /* Handle readonly medium early, no need to do DMA, touch the
+ * LED or attempt any writes. A real floppy doesn't attempt
+ * to write to readonly media either. */
+ fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, FD_SR1_NW,
+ 0x00);
+ Assert(len == 0);
+ goto transfer_error;
+ }
+ }
+
+ rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
+ for (start_pos = fdctrl->data_pos; fdctrl->data_pos < cb;) {
+ len = cb - fdctrl->data_pos;
+ if (len + rel_pos > FD_SECTOR_LEN)
+ len = FD_SECTOR_LEN - rel_pos;
+ FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x (%d-0x%08x 0x%08x)\n",
+ len, cb, fdctrl->data_pos, fdctrl->data_len, GET_CUR_DRV(fdctrl), cur_drv->head,
+ cur_drv->track, cur_drv->sect, fd_sector(cur_drv), fd_sector(cur_drv) * FD_SECTOR_LEN);
+ if (fdctrl->data_dir != FD_DIR_FORMAT &&
+ (fdctrl->data_dir != FD_DIR_WRITE ||
+ len < FD_SECTOR_LEN || rel_pos != 0)) {
+ /* READ & SCAN commands and realign to a sector for WRITE */
+ rc = blk_read(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
+ if (RT_FAILURE(rc))
+ {
+ FLOPPY_DPRINTF("Floppy: error getting sector %d\n",
+ fd_sector(cur_drv));
+ /* Sure, image size is too small... */
+ memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
+ }
+ }
+ switch (fdctrl->data_dir) {
+ case FD_DIR_READ:
+ /* READ commands */
+ {
+ uint32_t read;
+ int rc2 = PDMDevHlpDMAWriteMemory(fdctrl->pDevIns, uChannel,
+ fdctrl->fifo + rel_pos,
+ fdctrl->data_pos,
+ len, &read);
+ AssertMsgRC (rc2, ("DMAWriteMemory -> %Rrc\n", rc2));
+ }
+ break;
+ case FD_DIR_WRITE:
+ /* WRITE commands */
+ {
+ uint32_t written;
+ int rc2 = PDMDevHlpDMAReadMemory(fdctrl->pDevIns, uChannel,
+ fdctrl->fifo + rel_pos,
+ fdctrl->data_pos,
+ len, &written);
+ AssertMsgRC (rc2, ("DMAReadMemory -> %Rrc\n", rc2));
+ }
+
+ rc = blk_write(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
+ if (RT_FAILURE(rc))
+ {
+ FLOPPY_ERROR("writing sector %d\n", fd_sector(cur_drv));
+ fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00);
+ goto transfer_error;
+ }
+ break;
+ case FD_DIR_FORMAT:
+ /* FORMAT command */
+ {
+ uint8_t eot = fdctrl->fifo[3];
+ uint8_t filler = fdctrl->fifo[5];
+ uint32_t written;
+ int sct;
+ int rc2 = PDMDevHlpDMAReadMemory(fdctrl->pDevIns, uChannel,
+ fdctrl->fifo + rel_pos,
+ fdctrl->data_pos,
+ len, &written);
+ AssertMsgRC (rc2, ("DMAReadMemory -> %Rrc\n", rc2));
+
+ /* Fill the entire track with desired data pattern. */
+ FLOPPY_DPRINTF("formatting track: %d sectors, pattern %02x\n",
+ eot, filler);
+ memset(fdctrl->fifo, filler, FD_SECTOR_LEN);
+ for (sct = 0; sct < eot; ++sct)
+ {
+ rc = blk_write(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
+ if (RT_FAILURE(rc))
+ {
+ FLOPPY_ERROR("formatting sector %d\n", fd_sector(cur_drv));
+ fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00);
+ goto transfer_error;
+ }
+ fdctrl_seek_to_next_sect(fdctrl, cur_drv);
+ }
+ }
+ break;
+ default:
+ /* SCAN commands */
+ {
+ uint8_t tmpbuf[FD_SECTOR_LEN];
+ int ret;
+ uint32_t read;
+ int rc2 = PDMDevHlpDMAReadMemory(fdctrl->pDevIns, uChannel, tmpbuf,
+ fdctrl->data_pos, len, &read);
+ AssertMsg(RT_SUCCESS(rc2), ("DMAReadMemory -> %Rrc2\n", rc2)); NOREF(rc2);
+ ret = memcmp(tmpbuf, fdctrl->fifo + rel_pos, len);
+ if (ret == 0) {
+ status2 = FD_SR2_SEH;
+ goto end_transfer;
+ }
+ if ((ret < 0 && fdctrl->data_dir == FD_DIR_SCANL) ||
+ (ret > 0 && fdctrl->data_dir == FD_DIR_SCANH)) {
+ status2 = 0x00;
+ goto end_transfer;
+ }
+ }
+ break;
+ }
+ fdctrl->data_pos += len;
+ rel_pos = fdctrl->data_pos % FD_SECTOR_LEN;
+ if (rel_pos == 0) {
+ /* Seek to next sector */
+ if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv))
+ break;
+ }
+ }
+end_transfer:
+ len = fdctrl->data_pos - start_pos;
+ FLOPPY_DPRINTF("end transfer %d %d %d\n",
+ fdctrl->data_pos, len, fdctrl->data_len);
+ if (fdctrl->data_dir == FD_DIR_SCANE ||
+ fdctrl->data_dir == FD_DIR_SCANL ||
+ fdctrl->data_dir == FD_DIR_SCANH)
+ status2 = FD_SR2_SEH;
+ if (FD_DID_SEEK(fdctrl->data_state))
+ status0 |= FD_SR0_SEEK;
+ fdctrl->data_len -= len;
+ fdctrl_stop_transfer(fdctrl, status0, status1, status2);
+transfer_error:
+
+ return len;
+}
+
+/* Data register : 0x05 */
+static uint32_t fdctrl_read_data(fdctrl_t *fdctrl)
+{
+ fdrive_t *cur_drv;
+ uint32_t retval = 0;
+ unsigned pos;
+ int rc;
+
+ cur_drv = get_cur_drv(fdctrl);
+ fdctrl->dsr &= ~FD_DSR_PWRDOWN;
+ if (!(fdctrl->msr & FD_MSR_RQM) || !(fdctrl->msr & FD_MSR_DIO)) {
+ FLOPPY_ERROR("controller not ready for reading\n");
+ return 0;
+ }
+ pos = fdctrl->data_pos % FD_SECTOR_LEN;
+ if (fdctrl->msr & FD_MSR_NONDMA) {
+ if (cur_drv->pDrvMedia == NULL)
+ {
+ if (fdctrl->data_dir == FD_DIR_WRITE)
+ fdctrl_stop_transfer_now(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00);
+ else
+ fdctrl_stop_transfer_now(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
+ } else if (pos == 0) {
+ if (fdctrl->data_pos != 0)
+ if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv)) {
+ FLOPPY_DPRINTF("error seeking to next sector %d\n",
+ fd_sector(cur_drv));
+ return 0;
+ }
+
+ rc = blk_read(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
+ if (RT_FAILURE(rc))
+ {
+ FLOPPY_DPRINTF("error getting sector %d\n",
+ fd_sector(cur_drv));
+ /* Sure, image size is too small... */
+ memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
+ }
+ }
+ }
+ retval = fdctrl->fifo[pos];
+ if (++fdctrl->data_pos == fdctrl->data_len) {
+ fdctrl->data_pos = 0;
+ /* Switch from transfer mode to status mode
+ * then from status mode to command mode
+ */
+ if (fdctrl->msr & FD_MSR_NONDMA) {
+ fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00);
+ } else {
+ fdctrl_reset_fifo(fdctrl);
+ fdctrl_reset_irq(fdctrl);
+ }
+ }
+ FLOPPY_DPRINTF("data register: 0x%02x\n", retval);
+
+ return retval;
+}
+
+static void fdctrl_format_sector(fdctrl_t *fdctrl)
+{
+ fdrive_t *cur_drv;
+ uint8_t kh, kt, ks;
+ int ok = 0, rc;
+
+ SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
+ cur_drv = get_cur_drv(fdctrl);
+ kt = fdctrl->fifo[6];
+ kh = fdctrl->fifo[7];
+ ks = fdctrl->fifo[8];
+ FLOPPY_DPRINTF("format sector at %d %d %02x %02x (%d)\n",
+ GET_CUR_DRV(fdctrl), kh, kt, ks,
+ fd_sector_calc(kh, kt, ks, cur_drv->last_sect, NUM_SIDES(cur_drv)));
+ switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & FD_CONFIG_EIS)) {
+ case 2:
+ /* sect too big */
+ fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
+ fdctrl->fifo[3] = kt;
+ fdctrl->fifo[4] = kh;
+ fdctrl->fifo[5] = ks;
+ return;
+ case 3:
+ /* track too big */
+ fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_EC, 0x00);
+ fdctrl->fifo[3] = kt;
+ fdctrl->fifo[4] = kh;
+ fdctrl->fifo[5] = ks;
+ return;
+ case 4:
+ /* No seek enabled */
+ fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
+ fdctrl->fifo[3] = kt;
+ fdctrl->fifo[4] = kh;
+ fdctrl->fifo[5] = ks;
+ return;
+ case 5:
+ /* No disk in drive */
+ fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA, 0x00);
+ fdctrl->fifo[3] = kt;
+ fdctrl->fifo[4] = kh;
+ fdctrl->fifo[5] = ks;
+ return;
+ case 1:
+ fdctrl->data_state |= FD_STATE_SEEK;
+ break;
+ default:
+ break;
+ }
+ memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
+ if (cur_drv->pDrvMedia) {
+ rc = blk_write(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
+ if (RT_FAILURE (rc)) {
+ FLOPPY_ERROR("formatting sector %d\n", fd_sector(cur_drv));
+ fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00);
+ } else {
+ ok = 1;
+ }
+ }
+ if (ok) {
+ if (cur_drv->sect == cur_drv->last_sect) {
+ fdctrl->data_state &= ~FD_STATE_FORMAT;
+ /* Last sector done */
+ if (FD_DID_SEEK(fdctrl->data_state))
+ fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00);
+ else
+ fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00);
+ } else {
+ /* More to do */
+ fdctrl->data_pos = 0;
+ fdctrl->data_len = 4;
+ }
+ }
+}
+
+static void fdctrl_handle_lock(fdctrl_t *fdctrl, int direction)
+{
+ RT_NOREF(direction);
+ fdctrl->lock = (fdctrl->fifo[0] & 0x80) ? 1 : 0;
+ fdctrl->fifo[0] = fdctrl->lock << 4;
+ fdctrl_set_fifo(fdctrl, 1, 0);
+}
+
+static void fdctrl_handle_dumpreg(fdctrl_t *fdctrl, int direction)
+{
+ RT_NOREF(direction);
+ fdrive_t *cur_drv = get_cur_drv(fdctrl);
+
+ /* Drives position */
+ fdctrl->fifo[0] = drv0(fdctrl)->track;
+ fdctrl->fifo[1] = drv1(fdctrl)->track;
+#if MAX_FD == 4
+ fdctrl->fifo[2] = drv2(fdctrl)->track;
+ fdctrl->fifo[3] = drv3(fdctrl)->track;
+#else
+ fdctrl->fifo[2] = 0;
+ fdctrl->fifo[3] = 0;
+#endif
+ /* timers */
+ fdctrl->fifo[4] = fdctrl->timer0;
+ fdctrl->fifo[5] = (fdctrl->timer1 << 1) | (fdctrl->dor & FD_DOR_DMAEN ? 1 : 0);
+ fdctrl->fifo[6] = cur_drv->last_sect;
+ fdctrl->fifo[7] = (fdctrl->lock << 7) |
+ (cur_drv->perpendicular << 2);
+ fdctrl->fifo[8] = fdctrl->config;
+ fdctrl->fifo[9] = fdctrl->precomp_trk;
+ fdctrl_set_fifo(fdctrl, 10, 0);
+}
+
+static void fdctrl_handle_version(fdctrl_t *fdctrl, int direction)
+{
+ RT_NOREF(direction);
+ /* Controller's version */
+ fdctrl->fifo[0] = fdctrl->version;
+ fdctrl_set_fifo(fdctrl, 1, 0);
+}
+
+static void fdctrl_handle_partid(fdctrl_t *fdctrl, int direction)
+{
+ RT_NOREF(direction);
+ fdctrl->fifo[0] = 0x01; /* Stepping 1 */
+ fdctrl_set_fifo(fdctrl, 1, 0);
+}
+
+static void fdctrl_handle_restore(fdctrl_t *fdctrl, int direction)
+{
+ RT_NOREF(direction);
+ fdrive_t *cur_drv = get_cur_drv(fdctrl);
+
+ /* Drives position */
+ drv0(fdctrl)->track = fdctrl->fifo[3];
+ drv1(fdctrl)->track = fdctrl->fifo[4];
+#if MAX_FD == 4
+ drv2(fdctrl)->track = fdctrl->fifo[5];
+ drv3(fdctrl)->track = fdctrl->fifo[6];
+#endif
+ /* timers */
+ fdctrl->timer0 = fdctrl->fifo[7];
+ fdctrl->timer1 = fdctrl->fifo[8];
+ cur_drv->last_sect = fdctrl->fifo[9];
+ fdctrl->lock = fdctrl->fifo[10] >> 7;
+ cur_drv->perpendicular = (fdctrl->fifo[10] >> 2) & 0xF;
+ fdctrl->config = fdctrl->fifo[11];
+ fdctrl->precomp_trk = fdctrl->fifo[12];
+ fdctrl->pwrd = fdctrl->fifo[13];
+ fdctrl_reset_fifo(fdctrl);
+}
+
+static void fdctrl_handle_save(fdctrl_t *fdctrl, int direction)
+{
+ RT_NOREF(direction);
+ fdrive_t *cur_drv = get_cur_drv(fdctrl);
+
+ fdctrl->fifo[0] = 0;
+ fdctrl->fifo[1] = 0;
+ /* Drives position */
+ fdctrl->fifo[2] = drv0(fdctrl)->track;
+ fdctrl->fifo[3] = drv1(fdctrl)->track;
+#if MAX_FD == 4
+ fdctrl->fifo[4] = drv2(fdctrl)->track;
+ fdctrl->fifo[5] = drv3(fdctrl)->track;
+#else
+ fdctrl->fifo[4] = 0;
+ fdctrl->fifo[5] = 0;
+#endif
+ /* timers */
+ fdctrl->fifo[6] = fdctrl->timer0;
+ fdctrl->fifo[7] = fdctrl->timer1;
+ fdctrl->fifo[8] = cur_drv->last_sect;
+ fdctrl->fifo[9] = (fdctrl->lock << 7) |
+ (cur_drv->perpendicular << 2);
+ fdctrl->fifo[10] = fdctrl->config;
+ fdctrl->fifo[11] = fdctrl->precomp_trk;
+ fdctrl->fifo[12] = fdctrl->pwrd;
+ fdctrl->fifo[13] = 0;
+ fdctrl->fifo[14] = 0;
+ fdctrl_set_fifo(fdctrl, 15, 0);
+}
+
+static void fdctrl_handle_readid(fdctrl_t *fdctrl, int direction)
+{
+ RT_NOREF(direction);
+ fdrive_t *cur_drv = get_cur_drv(fdctrl);
+
+ FLOPPY_DPRINTF("CMD:%02x SEL:%02x\n", fdctrl->fifo[0], fdctrl->fifo[1]);
+
+ fdctrl->msr &= ~FD_MSR_RQM;
+ cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
+ PDMDevHlpTimerSetMillies(fdctrl->pDevIns, fdctrl->hResultTimer, 1000 / 50);
+}
+
+static void fdctrl_handle_format_track(fdctrl_t *fdctrl, int direction)
+{
+ RT_NOREF(direction);
+ fdrive_t *cur_drv;
+ uint8_t ns, dp;
+
+ SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
+ cur_drv = get_cur_drv(fdctrl);
+ fdctrl->data_state &= ~(FD_STATE_MULTI | FD_STATE_SEEK);
+ ns = fdctrl->fifo[3];
+ dp = fdctrl->fifo[5];
+
+ FLOPPY_DPRINTF("Format track %d at %d, %d sectors, filler %02x\n",
+ cur_drv->track, GET_CUR_DRV(fdctrl), ns, dp);
+ FLOPPY_DPRINTF("CMD:%02x SEL:%02x N:%02x SC:%02x GPL:%02x D:%02x\n",
+ fdctrl->fifo[0], fdctrl->fifo[1], fdctrl->fifo[2],
+ fdctrl->fifo[3], fdctrl->fifo[4], fdctrl->fifo[5]);
+
+ /* Since we cannot actually format anything, we have to make sure that
+ * whatever new format the guest is trying to establish matches the
+ * existing format of the medium.
+ */
+ if (cur_drv->last_sect != ns || fdctrl->fifo[2] != 2)
+ fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, FD_SR1_NW, 0);
+ else
+ {
+ cur_drv->bps = fdctrl->fifo[2] > 7 ? 16384 : 128 << fdctrl->fifo[2];
+ cur_drv->last_sect = ns;
+
+ fdctrl_start_format(fdctrl);
+ }
+}
+
+static void fdctrl_handle_specify(fdctrl_t *fdctrl, int direction)
+{
+ RT_NOREF(direction);
+ fdctrl->timer0 = (fdctrl->fifo[1] >> 4) & 0xF;
+ fdctrl->timer1 = fdctrl->fifo[2] >> 1;
+ if (fdctrl->fifo[2] & 1)
+ fdctrl->dor &= ~FD_DOR_DMAEN;
+ else
+ fdctrl->dor |= FD_DOR_DMAEN;
+ /* No result back */
+ fdctrl_reset_fifo(fdctrl);
+}
+
+static void fdctrl_handle_sense_drive_status(fdctrl_t *fdctrl, int direction)
+{
+ RT_NOREF(direction);
+ fdrive_t *cur_drv;
+
+ SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
+ cur_drv = get_cur_drv(fdctrl);
+ cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
+ /* 1 Byte status back */
+ fdctrl->fifo[0] = (cur_drv->ro << 6) |
+ (cur_drv->track == 0 ? 0x10 : 0x00) |
+ (cur_drv->head << 2) |
+ GET_CUR_DRV(fdctrl) |
+ 0x28;
+ fdctrl_set_fifo(fdctrl, 1, 0);
+}
+
+static void fdctrl_handle_recalibrate(fdctrl_t *fdctrl, int direction)
+{
+ RT_NOREF(direction);
+ fdrive_t *cur_drv;
+ uint8_t st0;
+
+ SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
+ cur_drv = get_cur_drv(fdctrl);
+ fd_recalibrate(cur_drv);
+ fdctrl_reset_fifo(fdctrl);
+ st0 = FD_SR0_SEEK | GET_CUR_DRV(fdctrl);
+ /* No drive means no TRK0 signal. */
+ if (cur_drv->drive == FDRIVE_DRV_NONE)
+ st0 |= FD_SR0_ABNTERM | FD_SR0_EQPMT;
+ /* Raise Interrupt */
+ fdctrl_raise_irq(fdctrl, st0);
+}
+
+static void fdctrl_handle_sense_interrupt_status(fdctrl_t *fdctrl, int direction)
+{
+ RT_NOREF(direction);
+ fdrive_t *cur_drv = get_cur_drv(fdctrl);
+
+ FLOPPY_DPRINTF("CMD:%02x\n", fdctrl->fifo[0]);
+ if(fdctrl->reset_sensei > 0) {
+ fdctrl->fifo[0] =
+ FD_SR0_RDYCHG + FD_RESET_SENSEI_COUNT - fdctrl->reset_sensei;
+ fdctrl->reset_sensei--;
+ } else {
+ /* XXX: status0 handling is broken for read/write
+ commands, so we do this hack. It should be suppressed
+ ASAP */
+ fdctrl->fifo[0] =
+ FD_SR0_SEEK | (cur_drv->head << 2) | GET_CUR_DRV(fdctrl);
+ /* Hack to preserve SR0 on equipment check failures (no drive). */
+ if (fdctrl->status0 & FD_SR0_EQPMT)
+ fdctrl->fifo[0] = fdctrl->status0;
+ }
+
+ fdctrl->fifo[1] = cur_drv->track;
+ fdctrl_set_fifo(fdctrl, 2, 0);
+ FLOPPY_DPRINTF("ST0:%02x PCN:%02x\n", fdctrl->fifo[0], fdctrl->fifo[1]);
+ fdctrl->status0 = FD_SR0_RDYCHG;
+}
+
+static void fdctrl_handle_seek(fdctrl_t *fdctrl, int direction)
+{
+ RT_NOREF(direction);
+ fdrive_t *cur_drv;
+
+ FLOPPY_DPRINTF("CMD:%02x SEL:%02x NCN:%02x\n", fdctrl->fifo[0],
+ fdctrl->fifo[1], fdctrl->fifo[2]);
+
+ SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
+ cur_drv = get_cur_drv(fdctrl);
+ fdctrl_reset_fifo(fdctrl);
+
+ /* The seek command just sends step pulses to the drive and doesn't care if
+ * there's a medium inserted or if it's banging the head against the drive.
+ */
+ cur_drv->track = fdctrl->fifo[2];
+ cur_drv->ltrk = cur_drv->track;
+ cur_drv->head = (fdctrl->fifo[1] >> 2) & 1;
+ /* Raise Interrupt */
+ fdctrl_raise_irq(fdctrl, FD_SR0_SEEK | GET_CUR_DRV(fdctrl));
+}
+
+static void fdctrl_handle_perpendicular_mode(fdctrl_t *fdctrl, int direction)
+{
+ RT_NOREF(direction);
+ fdrive_t *cur_drv = get_cur_drv(fdctrl);
+
+ if (fdctrl->fifo[1] & 0x80)
+ cur_drv->perpendicular = fdctrl->fifo[1] & 0x7;
+ /* No result back */
+ fdctrl_reset_fifo(fdctrl);
+}
+
+static void fdctrl_handle_configure(fdctrl_t *fdctrl, int direction)
+{
+ RT_NOREF(direction);
+ fdctrl->config = fdctrl->fifo[2];
+ fdctrl->precomp_trk = fdctrl->fifo[3];
+ /* No result back */
+ fdctrl_reset_fifo(fdctrl);
+}
+
+static void fdctrl_handle_powerdown_mode(fdctrl_t *fdctrl, int direction)
+{
+ RT_NOREF(direction);
+ fdctrl->pwrd = fdctrl->fifo[1];
+ fdctrl->fifo[0] = fdctrl->fifo[1];
+ fdctrl_set_fifo(fdctrl, 1, 0);
+}
+
+static void fdctrl_handle_option(fdctrl_t *fdctrl, int direction)
+{
+ RT_NOREF(direction);
+ /* No result back */
+ fdctrl_reset_fifo(fdctrl);
+}
+
+static void fdctrl_handle_drive_specification_command(fdctrl_t *fdctrl, int direction)
+{
+ RT_NOREF(direction);
+ /* fdrive_t *cur_drv = get_cur_drv(fdctrl); - unused */
+
+ /* This command takes a variable number of parameters. It can be terminated
+ * at any time if the high bit of a parameter is set. Once there are 6 bytes
+ * in the FIFO (command + 5 parameter bytes), data_len/data_pos will be 7.
+ */
+ if (fdctrl->data_len == 7 || (fdctrl->fifo[fdctrl->data_pos - 1] & 0x80)) {
+
+ /* Command parameters done */
+ if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x40) {
+ /* Data is echoed, but not stored! */
+ fdctrl->fifo[0] = fdctrl->data_len > 2 ? fdctrl->fifo[1] : 0;
+ fdctrl->fifo[1] = fdctrl->data_len > 3 ? fdctrl->fifo[2] : 0;
+ fdctrl->fifo[2] = 0;
+ fdctrl->fifo[3] = 0;
+ fdctrl_set_fifo(fdctrl, 4, 0);
+ } else {
+ fdctrl_reset_fifo(fdctrl);
+ }
+ } else
+ fdctrl->data_len++; /* Wait for another byte. */
+}
+
+static void fdctrl_handle_relative_seek_out(fdctrl_t *fdctrl, int direction)
+{
+ RT_NOREF(direction);
+ fdrive_t *cur_drv;
+
+ SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
+ cur_drv = get_cur_drv(fdctrl);
+ if (fdctrl->fifo[2] + cur_drv->track >= cur_drv->max_track) {
+ cur_drv->track = cur_drv->max_track - 1;
+ } else {
+ cur_drv->track += fdctrl->fifo[2];
+ }
+ fdctrl_reset_fifo(fdctrl);
+ /* Raise Interrupt */
+ fdctrl_raise_irq(fdctrl, FD_SR0_SEEK);
+}
+
+static void fdctrl_handle_relative_seek_in(fdctrl_t *fdctrl, int direction)
+{
+ RT_NOREF(direction);
+ fdrive_t *cur_drv;
+
+ SET_CUR_DRV(fdctrl, fdctrl->fifo[1] & FD_DOR_SELMASK);
+ cur_drv = get_cur_drv(fdctrl);
+ if (fdctrl->fifo[2] > cur_drv->track) {
+ cur_drv->track = 0;
+ } else {
+ cur_drv->track -= fdctrl->fifo[2];
+ }
+ fdctrl_reset_fifo(fdctrl);
+ /* Raise Interrupt */
+ fdctrl_raise_irq(fdctrl, FD_SR0_SEEK);
+}
+
+static const struct {
+ uint8_t value;
+ uint8_t mask;
+ const char* name;
+ int parameters;
+ void (*handler)(fdctrl_t *fdctrl, int direction);
+ int direction;
+} handlers[] = {
+ { FD_CMD_READ, 0x1f, "READ", 8, fdctrl_start_transfer, FD_DIR_READ },
+ { FD_CMD_WRITE, 0x3f, "WRITE", 8, fdctrl_start_transfer, FD_DIR_WRITE },
+ { FD_CMD_SEEK, 0xff, "SEEK", 2, fdctrl_handle_seek },
+ { FD_CMD_SENSE_INTERRUPT_STATUS, 0xff, "SENSE INTERRUPT STATUS", 0, fdctrl_handle_sense_interrupt_status },
+ { FD_CMD_RECALIBRATE, 0xff, "RECALIBRATE", 1, fdctrl_handle_recalibrate },
+ { FD_CMD_FORMAT_TRACK, 0xbf, "FORMAT TRACK", 5, fdctrl_handle_format_track },
+ { FD_CMD_READ_TRACK, 0x9f, "READ TRACK", 8, fdctrl_start_transfer, FD_DIR_READ },
+ { FD_CMD_RESTORE, 0xff, "RESTORE", 17, fdctrl_handle_restore }, /* part of READ DELETED DATA */
+ { FD_CMD_SAVE, 0xff, "SAVE", 0, fdctrl_handle_save }, /* part of READ DELETED DATA */
+ { FD_CMD_READ_DELETED, 0x1f, "READ DELETED DATA", 8, fdctrl_start_transfer_del, FD_DIR_READ },
+ { FD_CMD_SCAN_EQUAL, 0x1f, "SCAN EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANE },
+ { FD_CMD_VERIFY, 0x1f, "VERIFY", 8, fdctrl_unimplemented },
+ { FD_CMD_SCAN_LOW_OR_EQUAL, 0x1f, "SCAN LOW OR EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANL },
+ { FD_CMD_SCAN_HIGH_OR_EQUAL, 0x1f, "SCAN HIGH OR EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANH },
+ { FD_CMD_WRITE_DELETED, 0x3f, "WRITE DELETED DATA", 8, fdctrl_start_transfer_del, FD_DIR_WRITE },
+ { FD_CMD_READ_ID, 0xbf, "READ ID", 1, fdctrl_handle_readid },
+ { FD_CMD_SPECIFY, 0xff, "SPECIFY", 2, fdctrl_handle_specify },
+ { FD_CMD_SENSE_DRIVE_STATUS, 0xff, "SENSE DRIVE STATUS", 1, fdctrl_handle_sense_drive_status },
+ { FD_CMD_PERPENDICULAR_MODE, 0xff, "PERPENDICULAR MODE", 1, fdctrl_handle_perpendicular_mode },
+ { FD_CMD_CONFIGURE, 0xff, "CONFIGURE", 3, fdctrl_handle_configure },
+ { FD_CMD_POWERDOWN_MODE, 0xff, "POWERDOWN MODE", 2, fdctrl_handle_powerdown_mode },
+ { FD_CMD_OPTION, 0xff, "OPTION", 1, fdctrl_handle_option },
+ { FD_CMD_DRIVE_SPECIFICATION_COMMAND, 0xff, "DRIVE SPECIFICATION COMMAND", 1, fdctrl_handle_drive_specification_command },
+ { FD_CMD_RELATIVE_SEEK_OUT, 0xff, "RELATIVE SEEK OUT", 2, fdctrl_handle_relative_seek_out },
+ { FD_CMD_FORMAT_AND_WRITE, 0xff, "FORMAT AND WRITE", 10, fdctrl_unimplemented },
+ { FD_CMD_RELATIVE_SEEK_IN, 0xff, "RELATIVE SEEK IN", 2, fdctrl_handle_relative_seek_in },
+ { FD_CMD_LOCK, 0x7f, "LOCK", 0, fdctrl_handle_lock },
+ { FD_CMD_DUMPREG, 0xff, "DUMPREG", 0, fdctrl_handle_dumpreg },
+ { FD_CMD_VERSION, 0xff, "VERSION", 0, fdctrl_handle_version },
+ { FD_CMD_PART_ID, 0xff, "PART ID", 0, fdctrl_handle_partid },
+ { FD_CMD_WRITE, 0x1f, "WRITE (BeOS)", 8, fdctrl_start_transfer, FD_DIR_WRITE }, /* not in specification ; BeOS 4.5 bug */
+ { 0, 0, "unknown", 0, fdctrl_unimplemented }, /* default handler */
+};
+/* Associate command to an index in the 'handlers' array */
+static uint8_t command_to_handler[256];
+
+static void fdctrl_write_data(fdctrl_t *fdctrl, uint32_t value)
+{
+ fdrive_t *cur_drv;
+ int pos;
+
+ cur_drv = get_cur_drv(fdctrl);
+ /* Reset mode */
+ if (!(fdctrl->dor & FD_DOR_nRESET)) {
+ FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
+ return;
+ }
+ if (!(fdctrl->msr & FD_MSR_RQM) || (fdctrl->msr & FD_MSR_DIO)) {
+ FLOPPY_ERROR("controller not ready for writing\n");
+ return;
+ }
+ fdctrl->dsr &= ~FD_DSR_PWRDOWN;
+ /* Is it write command time ? */
+ if (fdctrl->msr & FD_MSR_NONDMA) {
+ /* FIFO data write */
+ pos = fdctrl->data_pos++;
+ pos %= FD_SECTOR_LEN;
+ fdctrl->fifo[pos] = value;
+
+ if (cur_drv->pDrvMedia == NULL)
+ {
+ if (fdctrl->data_dir == FD_DIR_WRITE)
+ fdctrl_stop_transfer_now(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00);
+ else
+ fdctrl_stop_transfer_now(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00);
+ } else if (pos == FD_SECTOR_LEN - 1 ||
+ fdctrl->data_pos == fdctrl->data_len) {
+ blk_write(cur_drv, fd_sector(cur_drv), fdctrl->fifo, 1);
+ }
+ /* Switch from transfer mode to status mode
+ * then from status mode to command mode
+ */
+ if (fdctrl->data_pos == fdctrl->data_len)
+ fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00);
+ return;
+ }
+ if (fdctrl->data_pos == 0) {
+ /* Command */
+ fdctrl_reset_irq(fdctrl); /* If pending from previous seek/recalibrate. */
+ pos = command_to_handler[value & 0xff];
+ FLOPPY_DPRINTF("%s command\n", handlers[pos].name);
+ fdctrl->data_len = handlers[pos].parameters + 1;
+ fdctrl->msr |= FD_MSR_CMDBUSY;
+ fdctrl->cur_cmd = value & 0xff;
+ }
+
+ FLOPPY_DPRINTF("%s: %02x\n", __FUNCTION__, value);
+ fdctrl->fifo[fdctrl->data_pos++ % FD_SECTOR_LEN] = value;
+ if (fdctrl->data_pos == fdctrl->data_len) {
+ /* We now have all parameters
+ * and will be able to treat the command
+ */
+ if (fdctrl->data_state & FD_STATE_FORMAT) {
+ fdctrl_format_sector(fdctrl);
+ return;
+ }
+
+ pos = command_to_handler[fdctrl->fifo[0] & 0xff];
+ FLOPPY_DPRINTF("treat %s command\n", handlers[pos].name);
+ (*handlers[pos].handler)(fdctrl, handlers[pos].direction);
+ }
+}
+
+
+/* -=-=-=-=-=-=-=-=- Timer Callback -=-=-=-=-=-=-=-=- */
+
+/**
+ * @callback_method_impl{FNTMTIMERDEV}
+ */
+static DECLCALLBACK(void) fdcTimerCallback(PPDMDEVINS pDevIns, TMTIMERHANDLE hTimer, void *pvUser)
+{
+ fdctrl_t *fdctrl = PDMDEVINS_2_DATA(pDevIns, fdctrl_t *);
+ fdrive_t *cur_drv = get_cur_drv(fdctrl);
+ RT_NOREF(hTimer, pvUser);
+
+ /* Pretend we are spinning.
+ * This is needed for Coherent, which uses READ ID to check for
+ * sector interleaving.
+ */
+ if (cur_drv->last_sect != 0) {
+ cur_drv->sect = (cur_drv->sect % cur_drv->last_sect) + 1;
+ }
+ /* READ_ID can't automatically succeed! */
+ if (!cur_drv->max_track) {
+ FLOPPY_DPRINTF("read id when no disk in drive\n");
+ /// @todo This is wrong! Command should not complete.
+ fdctrl_stop_transfer_now(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA | FD_SR1_ND, FD_SR2_MD);
+ } else if ((fdctrl->dsr & FD_DSR_DRATEMASK) != cur_drv->media_rate) {
+ FLOPPY_DPRINTF("read id rate mismatch (fdc=%d, media=%d)\n",
+ fdctrl->dsr & FD_DSR_DRATEMASK, cur_drv->media_rate);
+ fdctrl_stop_transfer_now(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA | FD_SR1_ND, FD_SR2_MD);
+ } else if (cur_drv->track >= cur_drv->max_track) {
+ FLOPPY_DPRINTF("read id past last track (%d >= %d)\n",
+ cur_drv->track, cur_drv->max_track);
+ cur_drv->ltrk = 0;
+ fdctrl_stop_transfer_now(fdctrl, FD_SR0_ABNTERM, FD_SR1_MA | FD_SR1_ND, FD_SR2_MD);
+ }
+ else
+ fdctrl_stop_transfer_now(fdctrl, 0x00, 0x00, 0x00);
+}
+
+
+/* -=-=-=-=-=-=-=-=- I/O Port Access Handlers -=-=-=-=-=-=-=-=- */
+
+/**
+ * @callback_method_impl{FNIOMIOPORTNEWOUT, Handling 0x3f0 accesses.}
+ */
+static DECLCALLBACK(VBOXSTRICTRC) fdcIoPort0Write(PPDMDEVINS pDevIns, void *pvUser, RTIOPORT offPort, uint32_t u32, unsigned cb)
+{
+ RT_NOREF(pvUser);
+
+ if (cb == 1)
+ fdctrl_write(PDMDEVINS_2_DATA(pDevIns, fdctrl_t *), offPort, u32);
+ else
+ ASSERT_GUEST_MSG_FAILED(("offPort=%#x cb=%d u32=%#x\n", offPort, cb, u32));
+ return VINF_SUCCESS;
+}
+
+
+/**
+ * @callback_method_impl{FNIOMIOPORTNEWIN, Handling 0x3f0 accesses.}
+ */
+static DECLCALLBACK(VBOXSTRICTRC) fdcIoPort0Read(PPDMDEVINS pDevIns, void *pvUser, RTIOPORT offPort, uint32_t *pu32, unsigned cb)
+{
+ RT_NOREF(pvUser);
+
+ if (cb == 1)
+ {
+ *pu32 = fdctrl_read(PDMDEVINS_2_DATA(pDevIns, fdctrl_t *), offPort);
+ return VINF_SUCCESS;
+ }
+ return VERR_IOM_IOPORT_UNUSED;
+}
+
+
+/**
+ * @callback_method_impl{FNIOMIOPORTNEWOUT, Handling 0x3f1..0x3f5 accesses.}
+ */
+static DECLCALLBACK(VBOXSTRICTRC) fdcIoPort1Write(PPDMDEVINS pDevIns, void *pvUser, RTIOPORT offPort, uint32_t u32, unsigned cb)
+{
+ RT_NOREF(pvUser);
+
+ if (cb == 1)
+ fdctrl_write(PDMDEVINS_2_DATA(pDevIns, fdctrl_t *), offPort + 1, u32);
+ else
+ ASSERT_GUEST_MSG_FAILED(("offPort=%#x cb=%d u32=%#x\n", offPort, cb, u32));
+ return VINF_SUCCESS;
+}
+
+
+/**
+ * @callback_method_impl{FNTMTIMERDEV}
+ */
+static DECLCALLBACK(void) fdcTransferDelayTimer(PPDMDEVINS pDevIns, TMTIMERHANDLE hTimer, void *pvUser)
+{
+ fdctrl_t *fdctrl = PDMDEVINS_2_DATA(pDevIns, fdctrl_t *);
+ RT_NOREF(pvUser, hTimer);
+ fdctrl_stop_transfer_now(fdctrl, fdctrl->st0, fdctrl->st1, fdctrl->st2);
+}
+
+
+/**
+ * @callback_method_impl{FNTMTIMERDEV}
+ */
+static DECLCALLBACK(void) fdcIrqDelayTimer(PPDMDEVINS pDevIns, TMTIMERHANDLE hTimer, void *pvUser)
+{
+ fdctrl_t *fdctrl = PDMDEVINS_2_DATA(pDevIns, fdctrl_t *);
+ RT_NOREF(pvUser, hTimer);
+ fdctrl_raise_irq_now(fdctrl, fdctrl->st0);
+}
+
+
+
+/* -=-=-=-=-=-=-=-=- I/O Port Access Handlers -=-=-=-=-=-=-=-=- */
+/**
+ * @callback_method_impl{FNIOMIOPORTNEWIN, Handling 0x3f1..0x3f5 accesses.}
+ */
+static DECLCALLBACK(VBOXSTRICTRC) fdcIoPort1Read(PPDMDEVINS pDevIns, void *pvUser, RTIOPORT offPort, uint32_t *pu32, unsigned cb)
+{
+ RT_NOREF(pvUser);
+
+ if (cb == 1)
+ {
+ *pu32 = fdctrl_read(PDMDEVINS_2_DATA(pDevIns, fdctrl_t *), offPort + 1);
+ return VINF_SUCCESS;
+ }
+ return VERR_IOM_IOPORT_UNUSED;
+}
+
+
+/**
+ * @callback_method_impl{FNIOMIOPORTNEWOUT, Handling 0x3f7 access.}
+ */
+static DECLCALLBACK(VBOXSTRICTRC) fdcIoPort2Write(PPDMDEVINS pDevIns, void *pvUser, RTIOPORT offPort, uint32_t u32, unsigned cb)
+{
+ RT_NOREF(offPort, pvUser);
+ Assert(offPort == 0);
+
+ if (cb == 1)
+ fdctrl_write(PDMDEVINS_2_DATA(pDevIns, fdctrl_t *), 7, u32);
+ else
+ ASSERT_GUEST_MSG_FAILED(("offPort=%#x cb=%d u32=%#x\n", offPort, cb, u32));
+ return VINF_SUCCESS;
+}
+
+
+/**
+ * @callback_method_impl{FNIOMIOPORTNEWIN, Handling 0x3f7 access.}
+ */
+static DECLCALLBACK(VBOXSTRICTRC) fdcIoPort2Read(PPDMDEVINS pDevIns, void *pvUser, RTIOPORT offPort, uint32_t *pu32, unsigned cb)
+{
+ RT_NOREF(pvUser, offPort);
+ Assert(offPort == 0);
+
+ if (cb == 1)
+ {
+ *pu32 = fdctrl_read(PDMDEVINS_2_DATA(pDevIns, fdctrl_t *), 7);
+ return VINF_SUCCESS;
+ }
+ return VERR_IOM_IOPORT_UNUSED;
+}
+
+
+/* -=-=-=-=-=-=-=-=- Debugger callback -=-=-=-=-=-=-=-=- */
+
+/**
+ * FDC debugger info callback.
+ *
+ * @param pDevIns The device instance.
+ * @param pHlp The output helpers.
+ * @param pszArgs The arguments.
+ */
+static DECLCALLBACK(void) fdcInfo(PPDMDEVINS pDevIns, PCDBGFINFOHLP pHlp, const char *pszArgs)
+{
+ fdctrl_t *pThis = PDMDEVINS_2_DATA(pDevIns, fdctrl_t *);
+ unsigned i;
+ bool fVerbose = false;
+
+ /* Parse arguments. */
+ if (pszArgs)
+ fVerbose = strstr(pszArgs, "verbose") != NULL;
+
+ /* Show basic information. */
+ pHlp->pfnPrintf(pHlp, "%s#%d: ",
+ pDevIns->pReg->szName,
+ pDevIns->iInstance);
+ pHlp->pfnPrintf(pHlp, "I/O=%X IRQ=%u DMA=%u ",
+ pThis->io_base,
+ pThis->irq_lvl,
+ pThis->dma_chann);
+ pHlp->pfnPrintf(pHlp, "RC=%RTbool R0=%RTbool\n", pDevIns->fRCEnabled, pDevIns->fR0Enabled);
+
+ /* Print register contents. */
+ pHlp->pfnPrintf(pHlp, "Registers: MSR=%02X DSR=%02X DOR=%02X\n",
+ pThis->msr, pThis->dsr, pThis->dor);
+ pHlp->pfnPrintf(pHlp, " DIR=%02X\n",
+ fdctrl_read_dir(pThis));
+
+ /* Print the current command, if any. */
+ if (pThis->cur_cmd)
+ pHlp->pfnPrintf(pHlp, "Curr cmd: %02X (%s)\n",
+ pThis->cur_cmd,
+ handlers[command_to_handler[pThis->cur_cmd]].name);
+ if (pThis->prev_cmd)
+ pHlp->pfnPrintf(pHlp, "Prev cmd: %02X (%s)\n",
+ pThis->prev_cmd,
+ handlers[command_to_handler[pThis->prev_cmd]].name);
+
+
+ for (i = 0; i < pThis->num_floppies; ++i)
+ {
+ fdrive_t *drv = &pThis->drives[i];
+ pHlp->pfnPrintf(pHlp, " Drive %u state:\n", i);
+ pHlp->pfnPrintf(pHlp, " Medium : %u tracks, %u sectors\n",
+ drv->max_track,
+ drv->last_sect);
+ pHlp->pfnPrintf(pHlp, " Current: track %u, head %u, sector %u\n",
+ drv->track,
+ drv->head,
+ drv->sect);
+ }
+}
+
+
+/* -=-=-=-=-=-=-=-=- Saved state -=-=-=-=-=-=-=-=- */
+
+/**
+ * @callback_method_impl{FNSSMDEVSAVEEXEC}
+ */
+static DECLCALLBACK(int) fdcSaveExec(PPDMDEVINS pDevIns, PSSMHANDLE pSSM)
+{
+ fdctrl_t *pThis = PDMDEVINS_2_DATA(pDevIns, fdctrl_t *);
+ PCPDMDEVHLPR3 pHlp = pDevIns->pHlpR3;
+ unsigned int i;
+ int rc;
+
+ /* Save the FDC I/O registers... */
+ pHlp->pfnSSMPutU8(pSSM, pThis->sra);
+ pHlp->pfnSSMPutU8(pSSM, pThis->srb);
+ pHlp->pfnSSMPutU8(pSSM, pThis->dor);
+ pHlp->pfnSSMPutU8(pSSM, pThis->tdr);
+ pHlp->pfnSSMPutU8(pSSM, pThis->dsr);
+ pHlp->pfnSSMPutU8(pSSM, pThis->msr);
+ /* ...the status registers... */
+ pHlp->pfnSSMPutU8(pSSM, pThis->status0);
+ pHlp->pfnSSMPutU8(pSSM, pThis->status1);
+ pHlp->pfnSSMPutU8(pSSM, pThis->status2);
+ /* ...the command FIFO... */
+ pHlp->pfnSSMPutU32(pSSM, sizeof(pThis->fifo));
+ pHlp->pfnSSMPutMem(pSSM, &pThis->fifo, sizeof(pThis->fifo));
+ pHlp->pfnSSMPutU32(pSSM, pThis->data_pos);
+ pHlp->pfnSSMPutU32(pSSM, pThis->data_len);
+ pHlp->pfnSSMPutU8(pSSM, pThis->data_state);
+ pHlp->pfnSSMPutU8(pSSM, pThis->data_dir);
+ /* ...and miscellaneous internal FDC state. */
+ pHlp->pfnSSMPutU8(pSSM, pThis->reset_sensei);
+ pHlp->pfnSSMPutU8(pSSM, pThis->eot);
+ pHlp->pfnSSMPutU8(pSSM, pThis->timer0);
+ pHlp->pfnSSMPutU8(pSSM, pThis->timer1);
+ pHlp->pfnSSMPutU8(pSSM, pThis->precomp_trk);
+ pHlp->pfnSSMPutU8(pSSM, pThis->config);
+ pHlp->pfnSSMPutU8(pSSM, pThis->lock);
+ pHlp->pfnSSMPutU8(pSSM, pThis->pwrd);
+ pHlp->pfnSSMPutU8(pSSM, pThis->version);
+
+ /* Save the number of drives and per-drive state. Note that the media
+ * states will be updated in fd_revalidate() and need not be saved.
+ */
+ pHlp->pfnSSMPutU8(pSSM, pThis->num_floppies);
+ Assert(RT_ELEMENTS(pThis->drives) == pThis->num_floppies);
+ for (i = 0; i < pThis->num_floppies; ++i)
+ {
+ fdrive_t *d = &pThis->drives[i];
+
+ pHlp->pfnSSMPutMem(pSSM, &d->Led, sizeof(d->Led));
+ pHlp->pfnSSMPutU32(pSSM, d->drive);
+ pHlp->pfnSSMPutU8(pSSM, d->dsk_chg);
+ pHlp->pfnSSMPutU8(pSSM, d->perpendicular);
+ pHlp->pfnSSMPutU8(pSSM, d->head);
+ pHlp->pfnSSMPutU8(pSSM, d->track);
+ pHlp->pfnSSMPutU8(pSSM, d->sect);
+ }
+ rc = pHlp->pfnTimerSave(pDevIns, pThis->hXferDelayTimer, pSSM);
+ AssertRCReturn(rc, rc);
+ rc = pHlp->pfnTimerSave(pDevIns, pThis->hIrqDelayTimer, pSSM);
+ AssertRCReturn(rc, rc);
+ return pHlp->pfnTimerSave(pDevIns, pThis->hResultTimer, pSSM);
+}
+
+
+/**
+ * @callback_method_impl{FNSSMDEVLOADEXEC}
+ */
+static DECLCALLBACK(int) fdcLoadExec(PPDMDEVINS pDevIns, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass)
+{
+ fdctrl_t *pThis = PDMDEVINS_2_DATA(pDevIns, fdctrl_t *);
+ PCPDMDEVHLPR3 pHlp = pDevIns->pHlpR3;
+ unsigned int i;
+ uint32_t val32;
+ uint8_t val8;
+ int rc;
+
+ if (uVersion > FDC_SAVESTATE_CURRENT)
+ return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
+ Assert(uPass == SSM_PASS_FINAL); NOREF(uPass);
+
+ if (uVersion > FDC_SAVESTATE_OLD)
+ {
+ /* Load the FDC I/O registers... */
+ pHlp->pfnSSMGetU8(pSSM, &pThis->sra);
+ pHlp->pfnSSMGetU8(pSSM, &pThis->srb);
+ pHlp->pfnSSMGetU8(pSSM, &pThis->dor);
+ pHlp->pfnSSMGetU8(pSSM, &pThis->tdr);
+ pHlp->pfnSSMGetU8(pSSM, &pThis->dsr);
+ pHlp->pfnSSMGetU8(pSSM, &pThis->msr);
+ /* ...the status registers... */
+ pHlp->pfnSSMGetU8(pSSM, &pThis->status0);
+ pHlp->pfnSSMGetU8(pSSM, &pThis->status1);
+ pHlp->pfnSSMGetU8(pSSM, &pThis->status2);
+ /* ...the command FIFO, if the size matches... */
+ rc = pHlp->pfnSSMGetU32(pSSM, &val32);
+ AssertRCReturn(rc, rc);
+ AssertMsgReturn(sizeof(pThis->fifo) == val32,
+ ("The size of FIFO in saved state doesn't match!\n"),
+ VERR_SSM_DATA_UNIT_FORMAT_CHANGED);
+ pHlp->pfnSSMGetMem(pSSM, &pThis->fifo, sizeof(pThis->fifo));
+ pHlp->pfnSSMGetU32(pSSM, &pThis->data_pos);
+ pHlp->pfnSSMGetU32(pSSM, &pThis->data_len);
+ pHlp->pfnSSMGetU8(pSSM, &pThis->data_state);
+ pHlp->pfnSSMGetU8(pSSM, &pThis->data_dir);
+ /* ...and miscellaneous internal FDC state. */
+ pHlp->pfnSSMGetU8(pSSM, &pThis->reset_sensei);
+ pHlp->pfnSSMGetU8(pSSM, &pThis->eot);
+ pHlp->pfnSSMGetU8(pSSM, &pThis->timer0);
+ pHlp->pfnSSMGetU8(pSSM, &pThis->timer1);
+ pHlp->pfnSSMGetU8(pSSM, &pThis->precomp_trk);
+ pHlp->pfnSSMGetU8(pSSM, &pThis->config);
+ pHlp->pfnSSMGetU8(pSSM, &pThis->lock);
+ pHlp->pfnSSMGetU8(pSSM, &pThis->pwrd);
+ pHlp->pfnSSMGetU8(pSSM, &pThis->version);
+
+ /* Validate the number of drives. */
+ rc = pHlp->pfnSSMGetU8(pSSM, &pThis->num_floppies);
+ AssertRCReturn(rc, rc);
+ AssertMsgReturn(RT_ELEMENTS(pThis->drives) == pThis->num_floppies,
+ ("The number of drives in saved state doesn't match!\n"),
+ VERR_SSM_DATA_UNIT_FORMAT_CHANGED);
+
+ /* Load the per-drive state. */
+ for (i = 0; i < pThis->num_floppies; ++i)
+ {
+ fdrive_t *d = &pThis->drives[i];
+
+ pHlp->pfnSSMGetMem(pSSM, &d->Led, sizeof(d->Led));
+ rc = pHlp->pfnSSMGetU32(pSSM, &val32);
+ AssertRCReturn(rc, rc);
+ d->drive = (fdrive_type_t)val32;
+ pHlp->pfnSSMGetU8(pSSM, &d->dsk_chg);
+ pHlp->pfnSSMGetU8(pSSM, &d->perpendicular);
+ pHlp->pfnSSMGetU8(pSSM, &d->head);
+ pHlp->pfnSSMGetU8(pSSM, &d->track);
+ pHlp->pfnSSMGetU8(pSSM, &d->sect);
+ }
+
+ if (uVersion > FDC_SAVESTATE_PRE_DELAY)
+ {
+ pHlp->pfnTimerLoad(pDevIns, pThis->hXferDelayTimer, pSSM);
+ pHlp->pfnTimerLoad(pDevIns, pThis->hIrqDelayTimer, pSSM);
+ }
+ }
+ else if (uVersion == FDC_SAVESTATE_OLD)
+ {
+ /* The old saved state was significantly different. However, we can get
+ * back most of the controller state and fix the rest by pretending the
+ * disk in the drive (if any) has been replaced. At any rate there should
+ * be no difficulty unless the state was saved during a floppy operation.
+ */
+
+ /* First verify a few assumptions. */
+ AssertMsgReturn(sizeof(pThis->fifo) == FD_SECTOR_LEN,
+ ("The size of FIFO in saved state doesn't match!\n"),
+ VERR_SSM_DATA_UNIT_FORMAT_CHANGED);
+ AssertMsgReturn(RT_ELEMENTS(pThis->drives) == 2,
+ ("The number of drives in old saved state doesn't match!\n"),
+ VERR_SSM_DATA_UNIT_FORMAT_CHANGED);
+ /* Now load the old state. */
+ pHlp->pfnSSMGetU8(pSSM, &pThis->version);
+ /* Toss IRQ level, DMA channel, I/O base, and state. */
+ pHlp->pfnSSMGetU8(pSSM, &val8);
+ pHlp->pfnSSMGetU8(pSSM, &val8);
+ pHlp->pfnSSMGetU32(pSSM, &val32);
+ pHlp->pfnSSMGetU8(pSSM, &val8);
+ /* Translate dma_en. */
+ rc = pHlp->pfnSSMGetU8(pSSM, &val8);
+ AssertRCReturn(rc, rc);
+ if (val8)
+ pThis->dor |= FD_DOR_DMAEN;
+ pHlp->pfnSSMGetU8(pSSM, &pThis->cur_drv);
+ /* Translate bootsel. */
+ rc = pHlp->pfnSSMGetU8(pSSM, &val8);
+ AssertRCReturn(rc, rc);
+ pThis->tdr |= val8 << 2;
+ pHlp->pfnSSMGetMem(pSSM, &pThis->fifo, FD_SECTOR_LEN);
+ pHlp->pfnSSMGetU32(pSSM, &pThis->data_pos);
+ pHlp->pfnSSMGetU32(pSSM, &pThis->data_len);
+ pHlp->pfnSSMGetU8(pSSM, &pThis->data_state);
+ pHlp->pfnSSMGetU8(pSSM, &pThis->data_dir);
+ pHlp->pfnSSMGetU8(pSSM, &pThis->status0);
+ pHlp->pfnSSMGetU8(pSSM, &pThis->eot);
+ pHlp->pfnSSMGetU8(pSSM, &pThis->timer0);
+ pHlp->pfnSSMGetU8(pSSM, &pThis->timer1);
+ pHlp->pfnSSMGetU8(pSSM, &pThis->precomp_trk);
+ pHlp->pfnSSMGetU8(pSSM, &pThis->config);
+ pHlp->pfnSSMGetU8(pSSM, &pThis->lock);
+ pHlp->pfnSSMGetU8(pSSM, &pThis->pwrd);
+
+ for (i = 0; i < 2; ++i)
+ {
+ fdrive_t *d = &pThis->drives[i];
+
+ pHlp->pfnSSMGetMem(pSSM, &d->Led, sizeof (d->Led));
+ rc = pHlp->pfnSSMGetU32(pSSM, &val32);
+ d->drive = (fdrive_type_t)val32;
+ AssertRCReturn(rc, rc);
+ pHlp->pfnSSMGetU32(pSSM, &val32); /* Toss drflags */
+ pHlp->pfnSSMGetU8(pSSM, &d->perpendicular);
+ pHlp->pfnSSMGetU8(pSSM, &d->head);
+ pHlp->pfnSSMGetU8(pSSM, &d->track);
+ pHlp->pfnSSMGetU8(pSSM, &d->sect);
+ pHlp->pfnSSMGetU8(pSSM, &val8); /* Toss dir, rw */
+ pHlp->pfnSSMGetU8(pSSM, &val8);
+ rc = pHlp->pfnSSMGetU32(pSSM, &val32);
+ AssertRCReturn(rc, rc);
+ d->flags = (fdrive_flags_t)val32;
+ pHlp->pfnSSMGetU8(pSSM, &d->last_sect);
+ pHlp->pfnSSMGetU8(pSSM, &d->max_track);
+ pHlp->pfnSSMGetU16(pSSM, &d->bps);
+ pHlp->pfnSSMGetU8(pSSM, &d->ro);
+ }
+ }
+ else
+ AssertFailedReturn(VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION);
+ return pHlp->pfnTimerLoad(pDevIns, pThis->hResultTimer, pSSM);
+}
+
+
+/* -=-=-=-=-=-=-=-=- Drive level interfaces -=-=-=-=-=-=-=-=- */
+
+/**
+ * @interface_method_impl{PDMIMOUNTNOTIFY,pfnMountNotify}
+ */
+static DECLCALLBACK(void) fdMountNotify(PPDMIMOUNTNOTIFY pInterface)
+{
+ fdrive_t *pDrv = RT_FROM_MEMBER(pInterface, fdrive_t, IMountNotify);
+ LogFlow(("fdMountNotify:\n"));
+ fd_revalidate(pDrv);
+}
+
+
+/**
+ * @interface_method_impl{PDMIMOUNTNOTIFY,pfnUnmountNotify}
+ */
+static DECLCALLBACK(void) fdUnmountNotify(PPDMIMOUNTNOTIFY pInterface)
+{
+ fdrive_t *pDrv = RT_FROM_MEMBER(pInterface, fdrive_t, IMountNotify);
+ LogFlow(("fdUnmountNotify:\n"));
+ fd_revalidate(pDrv);
+}
+
+
+/**
+ * @interface_method_impl{PDMIBASE,pfnQueryInterface}
+ */
+static DECLCALLBACK(void *) fdQueryInterface (PPDMIBASE pInterface, const char *pszIID)
+{
+ fdrive_t *pDrv = RT_FROM_MEMBER(pInterface, fdrive_t, IBase);
+
+ PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrv->IBase);
+ PDMIBASE_RETURN_INTERFACE(pszIID, PDMIMEDIAPORT, &pDrv->IPort);
+ PDMIBASE_RETURN_INTERFACE(pszIID, PDMIMOUNTNOTIFY, &pDrv->IMountNotify);
+ return NULL;
+}
+
+
+/**
+ * @interface_method_impl{PDMIMEDIAPORT,pfnQueryDeviceLocation}
+ */
+static DECLCALLBACK(int) fdQueryDeviceLocation(PPDMIMEDIAPORT pInterface, const char **ppcszController,
+ uint32_t *piInstance, uint32_t *piLUN)
+{
+ fdrive_t *pDrv = RT_FROM_MEMBER(pInterface, fdrive_t, IPort);
+ PPDMDEVINS pDevIns = pDrv->pDevIns;
+
+ AssertPtrReturn(ppcszController, VERR_INVALID_POINTER);
+ AssertPtrReturn(piInstance, VERR_INVALID_POINTER);
+ AssertPtrReturn(piLUN, VERR_INVALID_POINTER);
+
+ *ppcszController = pDevIns->pReg->szName;
+ *piInstance = pDevIns->iInstance;
+ *piLUN = pDrv->iLUN;
+
+ return VINF_SUCCESS;
+}
+
+/* -=-=-=-=-=-=-=-=- Controller level interfaces -=-=-=-=-=-=-=-=- */
+
+/**
+ * @interface_method_impl{PDMILEDPORTS,pfnQueryStatusLed}
+ */
+static DECLCALLBACK(int) fdcStatusQueryStatusLed(PPDMILEDPORTS pInterface, unsigned iLUN, PPDMLED *ppLed)
+{
+ fdctrl_t *pThis = RT_FROM_MEMBER (pInterface, fdctrl_t, ILeds);
+ if (iLUN < RT_ELEMENTS(pThis->drives)) {
+ *ppLed = &pThis->drives[iLUN].Led;
+ Assert ((*ppLed)->u32Magic == PDMLED_MAGIC);
+ return VINF_SUCCESS;
+ }
+ return VERR_PDM_LUN_NOT_FOUND;
+}
+
+
+/**
+ * @interface_method_impl{PDMIBASE,pfnQueryInterface}
+ */
+static DECLCALLBACK(void *) fdcStatusQueryInterface(PPDMIBASE pInterface, const char *pszIID)
+{
+ fdctrl_t *pThis = RT_FROM_MEMBER (pInterface, fdctrl_t, IBaseStatus);
+
+ PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pThis->IBaseStatus);
+ PDMIBASE_RETURN_INTERFACE(pszIID, PDMILEDPORTS, &pThis->ILeds);
+ return NULL;
+}
+
+
+/**
+ * Configure a drive.
+ *
+ * @returns VBox status code.
+ * @param drv The drive in question.
+ * @param pDevIns The driver instance.
+ * @param fInit Set if we're at init time and can change the drive type.
+ */
+static int fdConfig(fdrive_t *drv, PPDMDEVINS pDevIns, bool fInit)
+{
+ static const char * const s_apszDesc[] = {"Floppy Drive A:", "Floppy Drive B"};
+ int rc;
+
+ /*
+ * Reset the LED just to be on the safe side.
+ */
+ Assert (RT_ELEMENTS(s_apszDesc) > drv->iLUN);
+ Assert (drv->Led.u32Magic == PDMLED_MAGIC);
+ drv->Led.Actual.u32 = 0;
+ drv->Led.Asserted.u32 = 0;
+
+ /*
+ * Try attach the block device and get the interfaces.
+ */
+ rc = PDMDevHlpDriverAttach (pDevIns, drv->iLUN, &drv->IBase, &drv->pDrvBase, s_apszDesc[drv->iLUN]);
+ if (RT_SUCCESS (rc)) {
+ drv->pDrvMedia = PDMIBASE_QUERY_INTERFACE(drv->pDrvBase, PDMIMEDIA);
+ if (drv->pDrvMedia) {
+ drv->pDrvMount = PDMIBASE_QUERY_INTERFACE(drv->pDrvBase, PDMIMOUNT);
+ if (drv->pDrvMount) {
+ fd_init(drv, fInit);
+ } else {
+ AssertMsgFailed (("Configuration error: LUN#%d without mountable interface!\n", drv->iLUN));
+ rc = VERR_PDM_MISSING_INTERFACE;
+ }
+
+ } else {
+ AssertMsgFailed (("Configuration error: LUN#%d hasn't a block interface!\n", drv->iLUN));
+ rc = VERR_PDM_MISSING_INTERFACE;
+ }
+ } else {
+ AssertMsg (rc == VERR_PDM_NO_ATTACHED_DRIVER,
+ ("Failed to attach LUN#%d. rc=%Rrc\n", drv->iLUN, rc));
+ switch (rc) {
+ case VERR_ACCESS_DENIED:
+ /* Error already cached by DrvHostBase */
+ break;
+ case VERR_PDM_NO_ATTACHED_DRIVER:
+ /* Legal on architectures without a floppy controller */
+ break;
+ default:
+ rc = PDMDevHlpVMSetError (pDevIns, rc, RT_SRC_POS,
+ N_ ("The floppy controller cannot attach to the floppy drive"));
+ break;
+ }
+ }
+
+ if (RT_FAILURE (rc)) {
+ drv->pDrvBase = NULL;
+ drv->pDrvMedia = NULL;
+ drv->pDrvMount = NULL;
+ }
+ LogFlow (("fdConfig: returns %Rrc\n", rc));
+ return rc;
+}
+
+
+/**
+ * @interface_method_impl{PDMDEVREG,pfnAttach}
+ *
+ * This is called when we change block driver for a floppy drive.
+ */
+static DECLCALLBACK(int) fdcAttach(PPDMDEVINS pDevIns, unsigned iLUN, uint32_t fFlags)
+{
+ fdctrl_t *fdctrl = PDMDEVINS_2_DATA(pDevIns, fdctrl_t *);
+ fdrive_t *drv;
+ int rc;
+ LogFlow (("ideDetach: iLUN=%u\n", iLUN));
+
+ AssertMsgReturn(fFlags & PDM_TACH_FLAGS_NOT_HOT_PLUG,
+ ("The FDC device does not support hotplugging\n"),
+ VERR_INVALID_PARAMETER);
+
+ /*
+ * Validate.
+ */
+ if (iLUN >= 2) {
+ AssertMsgFailed (("Configuration error: cannot attach or detach any but the first two LUNs - iLUN=%u\n",
+ iLUN));
+ return VERR_PDM_DEVINS_NO_ATTACH;
+ }
+
+ /*
+ * Locate the drive and stuff.
+ */
+ drv = &fdctrl->drives[iLUN];
+
+ /* the usual paranoia */
+ AssertRelease (!drv->pDrvBase);
+ AssertRelease (!drv->pDrvMedia);
+ AssertRelease (!drv->pDrvMount);
+
+ rc = fdConfig (drv, pDevIns, false /*fInit*/);
+ AssertMsg (rc != VERR_PDM_NO_ATTACHED_DRIVER,
+ ("Configuration error: failed to configure drive %d, rc=%Rrc\n", iLUN, rc));
+ if (RT_SUCCESS(rc)) {
+ fd_revalidate (drv);
+ }
+
+ LogFlow (("floppyAttach: returns %Rrc\n", rc));
+ return rc;
+}
+
+
+/**
+ * @interface_method_impl{PDMDEVREG,pfnDetach}
+ *
+ * The floppy drive has been temporarily 'unplugged'.
+ */
+static DECLCALLBACK(void) fdcDetach(PPDMDEVINS pDevIns, unsigned iLUN, uint32_t fFlags)
+{
+ RT_NOREF(fFlags);
+ fdctrl_t *pThis = PDMDEVINS_2_DATA(pDevIns, fdctrl_t *);
+ LogFlow (("ideDetach: iLUN=%u\n", iLUN));
+
+ switch (iLUN)
+ {
+ case 0:
+ case 1:
+ {
+ fdrive_t *drv = &pThis->drives[iLUN];
+ drv->pDrvBase = NULL;
+ drv->pDrvMedia = NULL;
+ drv->pDrvMount = NULL;
+ break;
+ }
+
+ default:
+ AssertMsgFailed(("Cannot detach LUN#%d!\n", iLUN));
+ break;
+ }
+}
+
+
+/**
+ * @interface_method_impl{PDMDEVREG,pfnReset}
+ *
+ * I haven't check the specs on what's supposed to happen on reset, but we
+ * should get any 'FATAL: floppy recal:f07 ctrl not ready' when resetting
+ * at wrong time like we do if this was all void.
+ */
+static DECLCALLBACK(void) fdcReset(PPDMDEVINS pDevIns)
+{
+ fdctrl_t *pThis = PDMDEVINS_2_DATA (pDevIns, fdctrl_t *);
+ unsigned i;
+ LogFlow (("fdcReset:\n"));
+
+ fdctrl_reset(pThis, 0);
+
+ for (i = 0; i < RT_ELEMENTS(pThis->drives); i++)
+ fd_revalidate(&pThis->drives[i]);
+}
+
+
+/**
+ * @interface_method_impl{PDMDEVREG,pfnConstruct}
+ */
+static DECLCALLBACK(int) fdcConstruct(PPDMDEVINS pDevIns, int iInstance, PCFGMNODE pCfg)
+{
+ PDMDEV_CHECK_VERSIONS_RETURN(pDevIns);
+ fdctrl_t *pThis = PDMDEVINS_2_DATA(pDevIns, fdctrl_t *);
+ PCPDMDEVHLPR3 pHlp = pDevIns->pHlpR3;
+ int rc;
+
+ RT_NOREF(iInstance);
+ Assert(iInstance == 0);
+
+ /*
+ * Validate configuration.
+ */
+ PDMDEV_VALIDATE_CONFIG_RETURN(pDevIns, "IRQ|DMA|MemMapped|IOBase|StatusA|IRQDelay", "");
+
+ /*
+ * Read the configuration.
+ */
+ rc = pHlp->pfnCFGMQueryU8Def(pCfg, "IRQ", &pThis->irq_lvl, 6);
+ AssertMsgRCReturn(rc, ("Configuration error: Failed to read U8 IRQ, rc=%Rrc\n", rc), rc);
+
+ rc = pHlp->pfnCFGMQueryU8Def(pCfg, "DMA", &pThis->dma_chann, 2);
+ AssertMsgRCReturn(rc, ("Configuration error: Failed to read U8 DMA, rc=%Rrc\n", rc), rc);
+
+ rc = pHlp->pfnCFGMQueryU16Def(pCfg, "IOBase", &pThis->io_base, 0x3f0);
+ AssertMsgRCReturn(rc, ("Configuration error: Failed to read U16 IOBase, rc=%Rrc\n", rc), rc);
+
+ bool fMemMapped;
+ rc = pHlp->pfnCFGMQueryBoolDef(pCfg, "MemMapped", &fMemMapped, false);
+ AssertMsgRCReturn(rc, ("Configuration error: Failed to read bool value MemMapped rc=%Rrc\n", rc), rc);
+
+ uint16_t uIrqDelay;
+ rc = pHlp->pfnCFGMQueryU16Def(pCfg, "IRQDelay", &uIrqDelay, 0);
+ AssertMsgRCReturn(rc, ("Configuration error: Failed to read U16 IRQDelay, rc=%Rrc\n", rc), rc);
+
+ bool fStatusA;
+ rc = pHlp->pfnCFGMQueryBoolDef(pCfg, "StatusA", &fStatusA, false);
+ AssertMsgRCReturn(rc, ("Configuration error: Failed to read bool value fStatusA rc=%Rrc\n", rc), rc);
+
+ /*
+ * Initialize data.
+ */
+ LogFlow(("fdcConstruct: irq_lvl=%d dma_chann=%d io_base=%#x\n", pThis->irq_lvl, pThis->dma_chann, pThis->io_base));
+ pThis->pDevIns = pDevIns;
+ pThis->version = 0x90; /* Intel 82078 controller */
+ pThis->config = FD_CONFIG_EIS | FD_CONFIG_EFIFO; /* Implicit seek, polling & FIFO enabled */
+ pThis->num_floppies = MAX_FD;
+ pThis->hIoPorts0 = NIL_IOMMMIOHANDLE;
+ pThis->hIoPorts1 = NIL_IOMMMIOHANDLE;
+ pThis->hIoPorts2 = NIL_IOMMMIOHANDLE;
+
+ /* Fill 'command_to_handler' lookup table */
+ for (int ii = RT_ELEMENTS(handlers) - 1; ii >= 0; ii--)
+ for (unsigned j = 0; j < sizeof(command_to_handler); j++)
+ if ((j & handlers[ii].mask) == handlers[ii].value)
+ command_to_handler[j] = ii;
+
+ pThis->IBaseStatus.pfnQueryInterface = fdcStatusQueryInterface;
+ pThis->ILeds.pfnQueryStatusLed = fdcStatusQueryStatusLed;
+
+ for (unsigned i = 0; i < RT_ELEMENTS(pThis->drives); ++i)
+ {
+ fdrive_t *pDrv = &pThis->drives[i];
+
+ pDrv->drive = FDRIVE_DRV_NONE;
+ pDrv->iLUN = i;
+ pDrv->pDevIns = pDevIns;
+
+ pDrv->IBase.pfnQueryInterface = fdQueryInterface;
+ pDrv->IMountNotify.pfnMountNotify = fdMountNotify;
+ pDrv->IMountNotify.pfnUnmountNotify = fdUnmountNotify;
+ pDrv->IPort.pfnQueryDeviceLocation = fdQueryDeviceLocation;
+ pDrv->Led.u32Magic = PDMLED_MAGIC;
+ }
+
+ /*
+ * Create the FDC timer.
+ */
+ rc = PDMDevHlpTimerCreate(pDevIns, TMCLOCK_VIRTUAL, fdcTimerCallback, pThis,
+ TMTIMER_FLAGS_DEFAULT_CRIT_SECT | TMTIMER_FLAGS_NO_RING0,
+ "FDC Timer", &pThis->hResultTimer);
+ AssertRCReturn(rc, rc);
+
+ /*
+ * Create the transfer delay timer.
+ */
+ rc = PDMDevHlpTimerCreate(pDevIns, TMCLOCK_VIRTUAL_SYNC, fdcTransferDelayTimer, pThis,
+ TMTIMER_FLAGS_DEFAULT_CRIT_SECT | TMTIMER_FLAGS_NO_RING0,
+ "FDC Transfer Delay", &pThis->hXferDelayTimer);
+ AssertRCReturn(rc, rc);
+
+ /*
+ * Create the IRQ delay timer.
+ */
+ rc = PDMDevHlpTimerCreate(pDevIns, TMCLOCK_VIRTUAL_SYNC, fdcIrqDelayTimer, pThis,
+ TMTIMER_FLAGS_DEFAULT_CRIT_SECT | TMTIMER_FLAGS_NO_RING0,
+ "FDC IRQ Delay", &pThis->hIrqDelayTimer);
+ AssertRCReturn(rc, rc);
+
+ pThis->uIrqDelayMsec = uIrqDelay;
+
+ /*
+ * Register DMA channel.
+ */
+ if (pThis->dma_chann != 0xff)
+ {
+ rc = PDMDevHlpDMARegister(pDevIns, pThis->dma_chann, &fdctrl_transfer_handler, pThis);
+ AssertRCReturn(rc, rc);
+ }
+
+ /*
+ * IO / MMIO.
+ *
+ * We must skip I/O port 0x3f6 as it is the ATA alternate status register.
+ * Why we skip registering status register A, though, isn't as clear.
+ */
+ if (!fMemMapped)
+ {
+ static const IOMIOPORTDESC s_aDescs[] =
+ {
+ { "SRA", NULL, "Status register A", NULL },
+ { "SRB", NULL, "Status register B", NULL },
+ { "DOR", "DOR", "Digital output register", "Digital output register"},
+ { "TDR", "TDR", "Tape driver register", "Tape driver register"},
+ { "MSR", "DSR", "Main status register", "Datarate select register" },
+ { "FIFO", "FIFO", "Data FIFO", "Data FIFO" },
+ { "ATA", "ATA", NULL, NULL },
+ { "DIR", "CCR", "Digital input register", "Configuration control register"},
+ { NULL, NULL, NULL, NULL }
+ };
+
+ /* 0x3f0 */
+ if (fStatusA)
+ {
+ rc = PDMDevHlpIoPortCreateAndMap(pDevIns, pThis->io_base, 1 /*cPorts*/, fdcIoPort0Write, fdcIoPort0Read,
+ "FDC-SRA", s_aDescs, &pThis->hIoPorts0);
+ AssertRCReturn(rc, rc);
+ }
+
+ /* 0x3f1..0x3f5 */
+ rc = PDMDevHlpIoPortCreateAndMap(pDevIns, pThis->io_base + 0x1, 5, fdcIoPort1Write, fdcIoPort1Read,
+ "FDC#1", &s_aDescs[1], &pThis->hIoPorts1);
+ AssertRCReturn(rc, rc);
+
+ /* 0x3f7 */
+ rc = PDMDevHlpIoPortCreateAndMap(pDevIns, pThis->io_base + 0x7, 1, fdcIoPort2Write, fdcIoPort2Read,
+ "FDC#2", &s_aDescs[7], &pThis->hIoPorts2);
+ AssertRCReturn(rc, rc);
+ }
+ else
+ AssertMsgFailedReturn(("Memory mapped floppy not support by now\n"), VERR_NOT_SUPPORTED);
+
+ /*
+ * Register the saved state data unit.
+ */
+ rc = PDMDevHlpSSMRegister(pDevIns, FDC_SAVESTATE_CURRENT, sizeof(*pThis), fdcSaveExec, fdcLoadExec);
+ AssertRCReturn(rc, rc);
+
+ /*
+ * Register the debugger info callback.
+ */
+ PDMDevHlpDBGFInfoRegister(pDevIns, "fdc", "FDC info", fdcInfo);
+
+ /*
+ * Attach the status port (optional).
+ */
+ PPDMIBASE pBase;
+ rc = PDMDevHlpDriverAttach(pDevIns, PDM_STATUS_LUN, &pThis->IBaseStatus, &pBase, "Status Port");
+ if (RT_SUCCESS (rc))
+ pThis->pLedsConnector = PDMIBASE_QUERY_INTERFACE(pBase, PDMILEDCONNECTORS);
+ else
+ AssertMsgReturn(rc == VERR_PDM_NO_ATTACHED_DRIVER, ("Failed to attach to status driver. rc=%Rrc\n", rc), rc);
+
+ /*
+ * Initialize drives.
+ */
+ for (unsigned i = 0; i < RT_ELEMENTS(pThis->drives); i++)
+ {
+ rc = fdConfig(&pThis->drives[i], pDevIns, true /*fInit*/);
+ AssertMsgReturn(RT_SUCCESS(rc) || rc == VERR_PDM_NO_ATTACHED_DRIVER,
+ ("Configuration error: failed to configure drive %d, rc=%Rrc\n", i, rc),
+ rc);
+ }
+
+ fdctrl_reset(pThis, 0);
+
+ for (unsigned i = 0; i < RT_ELEMENTS(pThis->drives); i++)
+ fd_revalidate(&pThis->drives[i]);
+
+ return VINF_SUCCESS;
+}
+
+
+/**
+ * The device registration structure.
+ */
+const PDMDEVREG g_DeviceFloppyController =
+{
+ /* .u32Version = */ PDM_DEVREG_VERSION,
+ /* .uReserved0 = */ 0,
+ /* .szName = */ "i82078",
+ /* .fFlags = */ PDM_DEVREG_FLAGS_DEFAULT_BITS | PDM_DEVREG_FLAGS_NEW_STYLE,
+ /* .fClass = */ PDM_DEVREG_CLASS_STORAGE,
+ /* .cMaxInstances = */ 1,
+ /* .uSharedVersion = */ 42,
+ /* .cbInstanceShared = */ sizeof(fdctrl_t),
+ /* .cbInstanceCC = */ 0,
+ /* .cbInstanceRC = */ 0,
+ /* .cMaxPciDevices = */ 0,
+ /* .cMaxMsixVectors = */ 0,
+ /* .pszDescription = */ "Floppy drive controller (Intel 82078)",
+#if defined(IN_RING3)
+ /* .pszRCMod = */ "",
+ /* .pszR0Mod = */ "",
+ /* .pfnConstruct = */ fdcConstruct,
+ /* .pfnDestruct = */ NULL,
+ /* .pfnRelocate = */ NULL,
+ /* .pfnMemSetup = */ NULL,
+ /* .pfnPowerOn = */ NULL,
+ /* .pfnReset = */ fdcReset,
+ /* .pfnSuspend = */ NULL,
+ /* .pfnResume = */ NULL,
+ /* .pfnAttach = */ fdcAttach,
+ /* .pfnDetach = */ fdcDetach,
+ /* .pfnQueryInterface = */ NULL,
+ /* .pfnInitComplete = */ NULL,
+ /* .pfnPowerOff = */ NULL,
+ /* .pfnSoftReset = */ NULL,
+ /* .pfnReserved0 = */ NULL,
+ /* .pfnReserved1 = */ NULL,
+ /* .pfnReserved2 = */ NULL,
+ /* .pfnReserved3 = */ NULL,
+ /* .pfnReserved4 = */ NULL,
+ /* .pfnReserved5 = */ NULL,
+ /* .pfnReserved6 = */ NULL,
+ /* .pfnReserved7 = */ NULL,
+#elif defined(IN_RING0)
+ /* .pfnEarlyConstruct = */ NULL,
+ /* .pfnConstruct = */ NULL,
+ /* .pfnDestruct = */ NULL,
+ /* .pfnFinalDestruct = */ NULL,
+ /* .pfnRequest = */ NULL,
+ /* .pfnReserved0 = */ NULL,
+ /* .pfnReserved1 = */ NULL,
+ /* .pfnReserved2 = */ NULL,
+ /* .pfnReserved3 = */ NULL,
+ /* .pfnReserved4 = */ NULL,
+ /* .pfnReserved5 = */ NULL,
+ /* .pfnReserved6 = */ NULL,
+ /* .pfnReserved7 = */ NULL,
+#elif defined(IN_RC)
+ /* .pfnConstruct = */ NULL,
+ /* .pfnReserved0 = */ NULL,
+ /* .pfnReserved1 = */ NULL,
+ /* .pfnReserved2 = */ NULL,
+ /* .pfnReserved3 = */ NULL,
+ /* .pfnReserved4 = */ NULL,
+ /* .pfnReserved5 = */ NULL,
+ /* .pfnReserved6 = */ NULL,
+ /* .pfnReserved7 = */ NULL,
+#else
+# error "Not in IN_RING3, IN_RING0 or IN_RC!"
+#endif
+ /* .u32VersionEnd = */ PDM_DEVREG_VERSION
+};
+
+/*
+ * Local Variables:
+ * mode: c
+ * c-file-style: "k&r"
+ * indent-tabs-mode: nil
+ * End:
+ */
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-08-31 23:10:05 +0000