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706 lines
20 KiB
C
706 lines
20 KiB
C
/*
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* COPYRIGHT: GPL - See COPYING in the top level directory
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* PROJECT: ReactOS Virtual DOS Machine
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* FILE: dskbios32.c
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* PURPOSE: VDM 32-bit Disk BIOS
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* PROGRAMMERS: Hermes Belusca-Maito (hermes.belusca@sfr.fr)
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*/
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/* INCLUDES *******************************************************************/
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#include "ntvdm.h"
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#define NDEBUG
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#include <debug.h>
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#include "emulator.h"
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// #include "../../memory.h"
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// #include "cpu/bop.h"
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#include "cpu/cpu.h" // for EMULATOR_FLAG_ZF
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#include "int32.h"
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#include "dskbios32.h"
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// #include <bios/dskbios.h>
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#include "bios32p.h"
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#include "hardware/disk.h"
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/* DEFINES ********************************************************************/
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// Disks which are currently supported by the BIOS Disk module.
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// NOTE: For the current implementation those are arrays of pointers to
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// DISK_IMAGEs maintained by the Generic Disk Controller. In the future
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// they will be arrays of objects containing disk information needed by
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// the BIOS only.
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static PDISK_IMAGE FloppyDrive[2] = {NULL};
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static PDISK_IMAGE HardDrive[4] = {NULL};
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#pragma pack(push, 1)
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// See: http://www.ctyme.com/intr/rb-2445.htm
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typedef struct _FLOPPY_PARAM_TABLE
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{
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BYTE Unused0;
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BYTE Unused1;
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BYTE MotorOffDelay;
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BYTE SectorSize;
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BYTE SectorsPerTrack;
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BYTE SectorGapLength;
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BYTE DataLength;
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BYTE FormatGapLength;
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BYTE FormatFillByte;
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BYTE HeadSettleTime;
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BYTE MotorStartTime;
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} FLOPPY_PARAM_TABLE, *PFLOPPY_PARAM_TABLE;
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typedef struct _FLOPPY_PARAM_TABLE_EX
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{
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FLOPPY_PARAM_TABLE FloppyParamTable;
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// IBM Additions
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BYTE MaxTrackNumber;
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BYTE DataTransferRate;
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BYTE CmosDriveType;
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} FLOPPY_PARAM_TABLE_EX, *PFLOPPY_PARAM_TABLE_EX;
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#pragma pack(pop)
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// Parameters for 1.44 MB Floppy, taken from SeaBIOS
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#define FLOPPY_SIZE_CODE 0x02 // 512 byte sectors
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#define FLOPPY_DATALEN 0xFF // Not used - because size code is 0x02
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#define FLOPPY_MOTOR_TICKS 37 // ~2 seconds
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#define FLOPPY_FILLBYTE 0xF6
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#define FLOPPY_GAPLEN 0x1B
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#define FLOPPY_FORMAT_GAPLEN 0x6C
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static const FLOPPY_PARAM_TABLE_EX FloppyParamTable =
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{
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// PC-AT compatible table
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{
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0xAF, // step rate 12ms, head unload 240ms
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0x02, // head load time 4ms, DMA used
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FLOPPY_MOTOR_TICKS, // ~2 seconds
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FLOPPY_SIZE_CODE,
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18,
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FLOPPY_GAPLEN,
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FLOPPY_DATALEN,
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FLOPPY_FORMAT_GAPLEN,
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FLOPPY_FILLBYTE,
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0x0F, // 15ms
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0x08, // 1 second
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},
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// IBM Additions
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79, // maximum track
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0, // data transfer rate
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4, // drive type in CMOS
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};
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#pragma pack(push, 1)
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// See: http://www.ctyme.com/intr/rb-6135.htm
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typedef struct _HARDDISK_PARAM_TABLE
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{
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WORD Cylinders;
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BYTE Heads;
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WORD Unused0;
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WORD Unused1;
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BYTE Unused2;
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BYTE Control;
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BYTE StandardTimeout;
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BYTE FormatTimeout;
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BYTE CheckingTimeout;
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WORD LandZoneCylinder;
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BYTE SectorsPerTrack;
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BYTE Reserved;
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} HARDDISK_PARAM_TABLE, *PHARDDISK_PARAM_TABLE;
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#pragma pack(pop)
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// static const HARDDISK_PARAM_TABLE HardDiskParamTable =
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// {0};
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/* PRIVATE FUNCTIONS **********************************************************/
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static PDISK_IMAGE
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GetDisk(IN BYTE DiskNumber)
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{
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if (DiskNumber & 0x80)
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{
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DiskNumber &= ~0x80;
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if (DiskNumber >= ARRAYSIZE(HardDrive))
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{
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DPRINT1("GetDisk: HDD number 0x%02X invalid\n", DiskNumber | 0x80);
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return NULL;
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}
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return HardDrive[DiskNumber];
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}
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else
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{
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if (DiskNumber >= ARRAYSIZE(FloppyDrive))
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{
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DPRINT1("GetDisk: Floppy number 0x%02X invalid\n", DiskNumber);
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return NULL;
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}
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return FloppyDrive[DiskNumber];
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}
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}
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static VOID
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AllDisksReset(VOID)
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{
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Bda->LastDisketteOperation = 0;
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Bda->LastDiskOperation = 0;
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}
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/*static*/
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VOID WINAPI BiosDiskService(LPWORD Stack)
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{
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BYTE Drive;
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PDISK_IMAGE DiskImage;
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switch (getAH())
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{
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/* Disk -- Reset Disk System */
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case 0x00:
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{
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Drive = getDL();
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if (Drive & 0x80)
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{
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AllDisksReset();
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/* Return success */
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setAH(0x00);
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Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
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break;
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}
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Drive &= ~0x80;
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if (Drive >= ARRAYSIZE(FloppyDrive))
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{
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DPRINT1("BiosDiskService(0x00): Drive number 0x%02X invalid\n", Drive);
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/* Return error */
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setAH(0x01);
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Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
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break;
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}
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// TODO: Reset drive
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/* Return success */
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setAH(0x00);
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Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
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break;
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}
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/* Disk -- Get Status of Last Operation */
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case 0x01:
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{
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BYTE LastOperationStatus = 0x00;
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Drive = getDL();
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DiskImage = GetDisk(Drive);
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if (!DiskImage || !IsDiskPresent(DiskImage))
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{
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DPRINT1("BiosDiskService(0x01): Disk number 0x%02X invalid\n", Drive);
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/* Return error */
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setAH(0x01);
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Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
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break;
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}
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LastOperationStatus = DiskImage->LastOperationStatus;
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if (Drive & 0x80)
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Bda->LastDiskOperation = LastOperationStatus;
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else
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Bda->LastDisketteOperation = LastOperationStatus;
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/* Return last error */
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setAH(LastOperationStatus);
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if (LastOperationStatus == 0x00)
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Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
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else
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Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
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break;
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}
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/* Disk -- Read Sectors into Memory */
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case 0x02:
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{
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BYTE Status;
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BYTE Head = getDH();
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BYTE NumSectors = getAL();
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// CH: Low eight bits of cylinder number
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// CL: High two bits of cylinder (bits 6-7, hard disk only)
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WORD Cylinder = MAKEWORD(getCH(), (getCL() >> 6) & 0x02);
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// CL: Sector number 1-63 (bits 0-5)
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BYTE Sector = (getCL() & 0x3F); // 1-based
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Drive = getDL();
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DiskImage = GetDisk(Drive);
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if (!DiskImage || !IsDiskPresent(DiskImage))
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{
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DPRINT1("BiosDiskService(0x02): Disk number 0x%02X invalid\n", Drive);
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/* Return error */
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setAH(0x01);
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Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
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break;
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}
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/* Read the sectors */
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Status = ReadDisk(DiskImage, Cylinder, Head, Sector, NumSectors);
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if (Status == 0x00)
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{
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/* Return success */
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setAH(0x00);
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Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
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}
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else
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{
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DPRINT1("BiosDiskService(0x02): Error when reading from disk number 0x%02X (0x%02X)\n", Drive, Status);
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/* Return error */
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setAH(Status);
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Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
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}
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break;
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}
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/* Disk -- Write Disk Sectors */
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case 0x03:
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{
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BYTE Status;
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BYTE Head = getDH();
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BYTE NumSectors = getAL();
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// CH: Low eight bits of cylinder number
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// CL: High two bits of cylinder (bits 6-7, hard disk only)
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WORD Cylinder = MAKEWORD(getCH(), (getCL() >> 6) & 0x02);
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// CL: Sector number 1-63 (bits 0-5)
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BYTE Sector = (getCL() & 0x3F); // 1-based
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Drive = getDL();
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DiskImage = GetDisk(Drive);
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if (!DiskImage || !IsDiskPresent(DiskImage))
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{
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DPRINT1("BiosDiskService(0x03): Disk number 0x%02X invalid\n", Drive);
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/* Return error */
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setAH(0x01);
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Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
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break;
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}
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/* Write the sectors */
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Status = WriteDisk(DiskImage, Cylinder, Head, Sector, NumSectors);
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if (Status == 0x00)
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{
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/* Return success */
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setAH(0x00);
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Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
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}
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else
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{
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DPRINT1("BiosDiskService(0x03): Error when writing to disk number 0x%02X (0x%02X)\n", Drive, Status);
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/* Return error */
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setAH(Status);
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Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
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}
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break;
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}
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/* Disk -- Verify Disk Sectors */
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case 0x04:
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/* Floppy/Fixed Disk -- Format Track */
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case 0x05:
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/* Fixed Disk -- Format Track and Set Bad Sector Flags */
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case 0x06:
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/* Fixed Disk -- Format Drive starting at Given Track */
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case 0x07:
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goto Default;
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/* Disk -- Get Drive Parameters */
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case 0x08:
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{
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WORD MaxCylinders;
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BYTE MaxHeads;
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BYTE PresentDrives = 0;
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BYTE i;
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Drive = getDL();
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DiskImage = GetDisk(Drive);
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if (!DiskImage || !IsDiskPresent(DiskImage))
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{
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DPRINT1("BiosDiskService(0x08): Disk number 0x%02X invalid\n", Drive);
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/* Return error */
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setAH(0x01);
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Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
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break;
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}
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// Minus 2 because it's the maximum cylinder number (not count),
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// and the last cylinder is reserved (for compatibility with BIOSes
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// which reserve it for testing purposes).
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MaxCylinders = DiskImage->DiskInfo.Cylinders - 2;
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// Minus 1 because it's the maximum head number (not count).
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MaxHeads = DiskImage->DiskInfo.Heads - 1;
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// CL: Sector number 1-63 (bits 0-5)
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// High two bits of cylinder (bits 6-7, hard disk only)
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setCL((DiskImage->DiskInfo.Sectors & 0x3F) |
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((HIBYTE(MaxCylinders) & 0x02) << 6));
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// CH: Low eight bits of cylinder number
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setCH(LOBYTE(MaxCylinders));
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setDH(MaxHeads);
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if (Drive & 0x80)
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{
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/* Count the number of active HDDs */
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for (i = 0; i < ARRAYSIZE(HardDrive); ++i)
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{
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if (IsDiskPresent(HardDrive[i]))
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++PresentDrives;
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}
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/* Reset ES:DI to NULL */
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// FIXME: NONONO!! Apps expect (for example, MS-DOS kernel)
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// that this function does not modify ES:DI if it was called
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// for a HDD.
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// setES(0x0000);
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// setDI(0x0000);
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}
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else
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{
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/* Count the number of active floppies */
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for (i = 0; i < ARRAYSIZE(FloppyDrive); ++i)
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{
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if (IsDiskPresent(FloppyDrive[i]))
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++PresentDrives;
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}
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/* ES:DI points to the floppy parameter table */
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setES(HIWORD(((PULONG)BaseAddress)[0x1E]));
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setDI(LOWORD(((PULONG)BaseAddress)[0x1E]));
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}
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setDL(PresentDrives);
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setBL(DiskImage->DiskType); // DiskGeometryList[DiskImage->DiskType].biosval
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setAL(0x00);
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/* Return success */
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setAH(0x00);
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Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
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break;
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}
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/* Hard Disk -- Initialize Controller with Drive Parameters */
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case 0x09:
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/* Hard Disk -- Read Long Sectors */
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case 0x0A:
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/* Hard Disk -- Write Long Sectors */
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case 0x0B:
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goto Default;
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/* Hard Disk -- Seek to Cylinder */
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case 0x0C:
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{
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BYTE Status;
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BYTE Head = getDH();
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// CH: Low eight bits of cylinder number
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// CL: High two bits of cylinder (bits 6-7, hard disk only)
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WORD Cylinder = MAKEWORD(getCH(), (getCL() >> 6) & 0x02);
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// CL: Sector number 1-63 (bits 0-5)
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BYTE Sector = (getCL() & 0x3F); // 1-based
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Drive = getDL();
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if (!(Drive & 0x80))
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{
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DPRINT1("BiosDiskService(0x0C): Disk number 0x%02X is not a HDD\n", Drive);
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/* Return error */
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setAH(0x01);
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Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
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break;
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}
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DiskImage = GetDisk(Drive);
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if (!DiskImage || !IsDiskPresent(DiskImage))
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{
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DPRINT1("BiosDiskService(0x0C): Disk number 0x%02X invalid\n", Drive);
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/* Return error */
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setAH(0x01);
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Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
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break;
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}
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/* Set position */
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Status = SeekDisk(DiskImage, Cylinder, Head, Sector);
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if (Status == 0x00)
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{
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/* Return success */
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setAH(0x00);
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Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
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}
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else
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{
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DPRINT1("BiosDiskService(0x0C): Error when seeking in disk number 0x%02X (0x%02X)\n", Drive, Status);
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/* Return error */
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setAH(Status);
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Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
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}
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break;
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}
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/* Hard Disk -- Reset Hard Disks */
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case 0x0D:
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{
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// FIXME: Should do what 0x11 does.
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UNIMPLEMENTED;
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}
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/* Hard Disk -- Read Sector Buffer (XT only) */
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case 0x0E:
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/* Hard Disk -- Write Sector Buffer (XT only) */
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case 0x0F:
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goto Default;
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/* Hard Disk -- Check if Drive is ready */
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case 0x10:
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{
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Drive = getDL();
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if (!(Drive & 0x80))
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{
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DPRINT1("BiosDiskService(0x10): Disk number 0x%02X is not a HDD\n", Drive);
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/* Return error */
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setAH(0x01);
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Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
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break;
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}
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DiskImage = GetDisk(Drive);
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if (!DiskImage || !IsDiskPresent(DiskImage))
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{
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DPRINT1("BiosDiskService(0x10): Disk number 0x%02X invalid\n", Drive);
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/* Return error */
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setAH(0x01);
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Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
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break;
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}
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/* Return success */
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setAH(0x00);
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Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
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break;
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}
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/* Hard Disk -- Recalibrate Drive */
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case 0x11:
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{
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BYTE Status;
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Drive = getDL();
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if (!(Drive & 0x80))
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{
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DPRINT1("BiosDiskService(0x11): Disk number 0x%02X is not a HDD\n", Drive);
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/* Return error */
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setAH(0x01);
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Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
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break;
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}
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DiskImage = GetDisk(Drive);
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if (!DiskImage || !IsDiskPresent(DiskImage))
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{
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DPRINT1("BiosDiskService(0x11): Disk number 0x%02X invalid\n", Drive);
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/* Return error */
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setAH(0x01);
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Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
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break;
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}
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/* Set position to zero */
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Status = SeekDisk(DiskImage, /*Cylinder*/ 0, /*Head*/ 0, /*Sector*/ 1);
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if (Status == 0x00)
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{
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/* Return success */
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setAH(0x00);
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Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
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}
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else
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{
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|
DPRINT1("BiosDiskService(0x11): Error when recalibrating disk number 0x%02X (0x%02X)\n", Drive, Status);
|
|
|
|
/* Return error */
|
|
setAH(Status);
|
|
Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
/* Hard Disk -- Controller RAM Diagnostic */
|
|
case 0x12:
|
|
|
|
/* Hard Disk -- Drive Diagnostic */
|
|
case 0x13:
|
|
|
|
/* Hard Disk -- Controller Internal Diagnostic */
|
|
case 0x14:
|
|
goto Default;
|
|
|
|
/* Disk -- Get Disk Type */
|
|
case 0x15:
|
|
{
|
|
Drive = getDL();
|
|
DiskImage = GetDisk(Drive);
|
|
if (!DiskImage || !IsDiskPresent(DiskImage))
|
|
{
|
|
DPRINT1("BiosDiskService(0x15): Disk number 0x%02X invalid\n", Drive);
|
|
|
|
/* Return error */
|
|
setAH(0x01);
|
|
Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
|
|
break;
|
|
}
|
|
|
|
if (Drive & 0x80)
|
|
{
|
|
ULONG NumSectors;
|
|
|
|
/* Hard disk */
|
|
setAH(0x03);
|
|
|
|
/* Number of 512-byte sectors in CX:DX */
|
|
NumSectors = (ULONG)((ULONG)DiskImage->DiskInfo.Cylinders * DiskImage->DiskInfo.Heads)
|
|
* DiskImage->DiskInfo.Sectors;
|
|
setCX(HIWORD(NumSectors));
|
|
setDX(LOWORD(NumSectors));
|
|
}
|
|
else
|
|
{
|
|
/* Floppy */
|
|
setAH(0x01);
|
|
}
|
|
|
|
/* Return success */
|
|
Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
|
|
break;
|
|
}
|
|
|
|
/* Floppy Disk -- Detect Disk Change */
|
|
case 0x16:
|
|
|
|
/* Floppy Disk -- Set Disk Type for Format */
|
|
case 0x17:
|
|
|
|
/* Disk -- Set Media Type for Format */
|
|
case 0x18:
|
|
goto Default;
|
|
|
|
default: Default:
|
|
{
|
|
DPRINT1("BIOS Function INT 13h, AH = 0x%02X, AL = 0x%02X, BH = 0x%02X NOT IMPLEMENTED\n",
|
|
getAH(), getAL(), getBH());
|
|
}
|
|
}
|
|
}
|
|
|
|
/* PUBLIC FUNCTIONS ***********************************************************/
|
|
|
|
VOID DiskBios32Post(VOID)
|
|
{
|
|
/*
|
|
* Initialize BIOS Disk RAM dynamic data
|
|
*/
|
|
|
|
/* Some vectors are in fact addresses to tables */
|
|
// Diskette Parameters
|
|
((PULONG)BaseAddress)[0x1E] = MAKELONG(0xEFC7, BIOS_SEGMENT);
|
|
// Hard Disk 0 Parameter Table Address
|
|
((PULONG)BaseAddress)[0x41] = NULL32;
|
|
// Hard Disk 1 Drive Parameter Table Address
|
|
((PULONG)BaseAddress)[0x46] = NULL32;
|
|
|
|
/* Relocated services by the BIOS (when needed) */
|
|
((PULONG)BaseAddress)[0x40] = NULL32; // ROM BIOS Diskette Handler relocated by Hard Disk BIOS
|
|
// RegisterBiosInt32(0x40, NULL); // ROM BIOS Diskette Handler relocated by Hard Disk BIOS
|
|
|
|
/* Register the BIOS 32-bit Interrupts */
|
|
RegisterBiosInt32(BIOS_DISK_INTERRUPT, BiosDiskService);
|
|
|
|
/* Initialize the BDA */
|
|
// Bda->LastDisketteOperation = 0;
|
|
// Bda->LastDiskOperation = 0;
|
|
AllDisksReset();
|
|
}
|
|
|
|
BOOLEAN DiskBios32Initialize(VOID)
|
|
{
|
|
/*
|
|
* Initialize BIOS Disk ROM static data
|
|
*/
|
|
|
|
/* Floppy Parameter Table */
|
|
RtlCopyMemory(SEG_OFF_TO_PTR(BIOS_SEGMENT, 0xEFC7),
|
|
&FloppyParamTable.FloppyParamTable,
|
|
sizeof(FloppyParamTable.FloppyParamTable));
|
|
|
|
//
|
|
// FIXME: Must be done by HW floppy controller!
|
|
//
|
|
|
|
/* Detect and initialize the supported disks */
|
|
// TODO: the "Detect" part is missing.
|
|
FloppyDrive[0] = RetrieveDisk(FLOPPY_DISK, 0);
|
|
FloppyDrive[1] = RetrieveDisk(FLOPPY_DISK, 1);
|
|
HardDrive[0] = RetrieveDisk(HARD_DISK, 0);
|
|
HardDrive[1] = RetrieveDisk(HARD_DISK, 1);
|
|
HardDrive[2] = RetrieveDisk(HARD_DISK, 2);
|
|
HardDrive[3] = RetrieveDisk(HARD_DISK, 3);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
VOID DiskBios32Cleanup(VOID)
|
|
{
|
|
}
|
|
|
|
/* EOF */
|