qemu

FORK: QEMU emulator
git clone https://git.neptards.moe/neptards/qemu.git
Log | Files | Refs | Submodules | LICENSE

fdc-internal.h (4693B)

      1 /*
      2  * QEMU Floppy disk emulator (Intel 82078)
      3  *
      4  * Copyright (c) 2003, 2007 Jocelyn Mayer
      5  * Copyright (c) 2008 Hervé Poussineau
      6  *
      7  * Permission is hereby granted, free of charge, to any person obtaining a copy
      8  * of this software and associated documentation files (the "Software"), to deal
      9  * in the Software without restriction, including without limitation the rights
     10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     11  * copies of the Software, and to permit persons to whom the Software is
     12  * furnished to do so, subject to the following conditions:
     13  *
     14  * The above copyright notice and this permission notice shall be included in
     15  * all copies or substantial portions of the Software.
     16  *
     17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
     20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
     23  * THE SOFTWARE.
     24  */
     25 #ifndef HW_BLOCK_FDC_INTERNAL_H
     26 #define HW_BLOCK_FDC_INTERNAL_H
     27 
     28 #include "exec/memory.h"
     29 #include "exec/ioport.h"
     30 #include "hw/block/block.h"
     31 #include "hw/block/fdc.h"
     32 #include "qapi/qapi-types-block.h"
     33 
     34 typedef struct FDCtrl FDCtrl;
     35 
     36 /* Floppy bus emulation */
     37 
     38 typedef struct FloppyBus {
     39     BusState bus;
     40     FDCtrl *fdc;
     41 } FloppyBus;
     42 
     43 /* Floppy disk drive emulation */
     44 
     45 typedef enum FDriveRate {
     46     FDRIVE_RATE_500K = 0x00,  /* 500 Kbps */
     47     FDRIVE_RATE_300K = 0x01,  /* 300 Kbps */
     48     FDRIVE_RATE_250K = 0x02,  /* 250 Kbps */
     49     FDRIVE_RATE_1M   = 0x03,  /*   1 Mbps */
     50 } FDriveRate;
     51 
     52 typedef enum FDriveSize {
     53     FDRIVE_SIZE_UNKNOWN,
     54     FDRIVE_SIZE_350,
     55     FDRIVE_SIZE_525,
     56 } FDriveSize;
     57 
     58 typedef struct FDFormat {
     59     FloppyDriveType drive;
     60     uint8_t last_sect;
     61     uint8_t max_track;
     62     uint8_t max_head;
     63     FDriveRate rate;
     64 } FDFormat;
     65 
     66 typedef enum FDiskFlags {
     67     FDISK_DBL_SIDES  = 0x01,
     68 } FDiskFlags;
     69 
     70 typedef struct FDrive {
     71     FDCtrl *fdctrl;
     72     BlockBackend *blk;
     73     BlockConf *conf;
     74     /* Drive status */
     75     FloppyDriveType drive;    /* CMOS drive type        */
     76     uint8_t perpendicular;    /* 2.88 MB access mode    */
     77     /* Position */
     78     uint8_t head;
     79     uint8_t track;
     80     uint8_t sect;
     81     /* Media */
     82     FloppyDriveType disk;     /* Current disk type      */
     83     FDiskFlags flags;
     84     uint8_t last_sect;        /* Nb sector per track    */
     85     uint8_t max_track;        /* Nb of tracks           */
     86     uint16_t bps;             /* Bytes per sector       */
     87     uint8_t ro;               /* Is read-only           */
     88     uint8_t media_changed;    /* Is media changed       */
     89     uint8_t media_rate;       /* Data rate of medium    */
     90 
     91     bool media_validated;     /* Have we validated the media? */
     92 } FDrive;
     93 
     94 struct FDCtrl {
     95     MemoryRegion iomem;
     96     qemu_irq irq;
     97     /* Controller state */
     98     QEMUTimer *result_timer;
     99     int dma_chann;
    100     uint8_t phase;
    101     IsaDma *dma;
    102     /* Controller's identification */
    103     uint8_t version;
    104     /* HW */
    105     uint8_t sra;
    106     uint8_t srb;
    107     uint8_t dor;
    108     uint8_t dor_vmstate; /* only used as temp during vmstate */
    109     uint8_t tdr;
    110     uint8_t dsr;
    111     uint8_t msr;
    112     uint8_t cur_drv;
    113     uint8_t status0;
    114     uint8_t status1;
    115     uint8_t status2;
    116     /* Command FIFO */
    117     uint8_t *fifo;
    118     int32_t fifo_size;
    119     uint32_t data_pos;
    120     uint32_t data_len;
    121     uint8_t data_state;
    122     uint8_t data_dir;
    123     uint8_t eot; /* last wanted sector */
    124     /* States kept only to be returned back */
    125     /* precompensation */
    126     uint8_t precomp_trk;
    127     uint8_t config;
    128     uint8_t lock;
    129     /* Power down config (also with status regB access mode */
    130     uint8_t pwrd;
    131     /* Floppy drives */
    132     FloppyBus bus;
    133     uint8_t num_floppies;
    134     FDrive drives[MAX_FD];
    135     struct {
    136         FloppyDriveType type;
    137     } qdev_for_drives[MAX_FD];
    138     int reset_sensei;
    139     FloppyDriveType fallback; /* type=auto failure fallback */
    140     /* Timers state */
    141     uint8_t timer0;
    142     uint8_t timer1;
    143     PortioList portio_list;
    144 };
    145 
    146 extern const FDFormat fd_formats[];
    147 extern const VMStateDescription vmstate_fdc;
    148 
    149 uint32_t fdctrl_read(void *opaque, uint32_t reg);
    150 void fdctrl_write(void *opaque, uint32_t reg, uint32_t value);
    151 void fdctrl_reset(FDCtrl *fdctrl, int do_irq);
    152 void fdctrl_realize_common(DeviceState *dev, FDCtrl *fdctrl, Error **errp);
    153 
    154 int fdctrl_transfer_handler(void *opaque, int nchan, int dma_pos, int dma_len);
    155 
    156 void fdctrl_init_drives(FloppyBus *bus, DriveInfo **fds);
    157 
    158 #endif