BasiliskII/src/disk.cpp

/*
 *  disk.cpp - Generic disk driver
 *
 *  Basilisk II (C) 1997-2000 Christian Bauer
 *
 *  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; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  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, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/*
 *  SEE ALSO
 *    Inside Macintosh: Devices, chapter 1 "Device Manager"
 *    Technote DV 05: "Drive Queue Elements"
 *    Technote DV 23: "Driver Education"
 *    Technote FL 24: "Don't Look at ioPosOffset for Devices"
 */

#include <string.h>

#include "sysdeps.h"
#include "cpu_emulation.h"
#include "main.h"
#include "macos_util.h"
#include "sys.h"
#include "prefs.h"
#include "disk.h"

#define DEBUG 0
#include "debug.h"


// .Disk Disk/drive icon
const uint8 DiskIcon[258] = {
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7f, 0xff, 0xff, 0xfe,
        0x80, 0x00, 0x00, 0x01, 0x80, 0x00, 0x00, 0x01, 0x80, 0x00, 0x00, 0x01, 0x80, 0x00, 0x00, 0x01,
        0x80, 0x00, 0x00, 0x01, 0x8c, 0x00, 0x00, 0x01, 0x80, 0x00, 0x00, 0x01, 0x80, 0x00, 0x00, 0x01,
        0x7f, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7f, 0xff, 0xff, 0xfe,
        0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
        0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
        0x7f, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

        0, 0
};


// Struct for each drive
struct DriveInfo {
        DriveInfo()
        {
                next = NULL;
                num = 0;
                fh = NULL;
                read_only = false;
                status = 0;
        }

        DriveInfo *next;        // Pointer to next DriveInfo (must be first in struct!)
        int num;                        // Drive number
        void *fh;                       // File handle
        uint32 num_blocks;      // Size in 512-byte blocks
        bool to_be_mounted;     // Flag: drive must be mounted in accRun
        bool read_only;         // Flag: force write protection
        uint32 status;          // Mac address of drive status record
};

// Linked list of DriveInfos
static DriveInfo *first_drive_info;

// Icon address (Mac address space, set by PatchROM())
uint32 DiskIconAddr;

// Flag: Control(accRun) has been called, interrupt routine is now active
static bool acc_run_called = false;


/*
 *  Get pointer to drive info, NULL = invalid drive number
 */

static DriveInfo *get_drive_info(int num)
{
        DriveInfo *info = first_drive_info;
        while (info != NULL) {
                if (info->num == num)
                        return info;
                info = info->next;
        }
        return NULL;
}


/*
 *  Initialization
 */

void DiskInit(void)
{
        first_drive_info = NULL;

        // No drives specified in prefs? Then add defaults
        if (PrefsFindString("disk", 0) == NULL)
                SysAddDiskPrefs();

        // Add drives specified in preferences
        int32 index = 0;
        const char *str;
        while ((str = PrefsFindString("disk", index++)) != NULL) {
                bool read_only = false;
                if (str[0] == '*') {
                        read_only = true;
                        str++;
                }
                void *fh = Sys_open(str, read_only);
                if (fh) {
                        D(bug(" adding drive '%s'\n", str));
                        DriveInfo *info = new DriveInfo;
                        info->fh = fh;
                        info->read_only = SysIsReadOnly(fh);
                        DriveInfo *p = (DriveInfo *)&first_drive_info;
                        while (p->next != NULL)
                                p = p->next;
                        p->next = info;
                }
        }
}


/*
 *  Deinitialization
 */

void DiskExit(void)
{
        DriveInfo *info = first_drive_info, *next;
        while (info != NULL) {
                Sys_close(info->fh);
                next = info->next;
                delete info;
                info = next;
        }
}


/*
 *  Disk was inserted, flag for mounting
 */

bool DiskMountVolume(void *fh)
{
        DriveInfo *info;
        for (info = first_drive_info; info != NULL && info->fh != fh; info = info->next) ;
        if (info) {
                if (SysIsDiskInserted(info->fh)) {
                        info->read_only = SysIsReadOnly(info->fh);
                        WriteMacInt8(info->status + dsDiskInPlace, 1);  // Inserted removable disk
                        WriteMacInt8(info->status + dsWriteProt, info->read_only ? 0xff : 0);
                        info->num_blocks = SysGetFileSize(info->fh) / 512;
                        WriteMacInt16(info->status + dsDriveSize, info->num_blocks & 0xffff);
                        WriteMacInt16(info->status + dsDriveS1, info->num_blocks >> 16);
                        info->to_be_mounted = true;
                }
                return true;
        } else
                return false;
}


/*
 *  Mount volumes for which the to_be_mounted flag is set
 *  (called during interrupt time)
 */

static void mount_mountable_volumes(void)
{
        DriveInfo *info = first_drive_info;
        while (info != NULL) {

                // Disk in drive?
                if (!ReadMacInt8(info->status + dsDiskInPlace)) {

                        // No, check if disk was inserted
                        if (SysIsDiskInserted(info->fh))
                                DiskMountVolume(info->fh);
                }

                // Mount disk if flagged
                if (info->to_be_mounted) {
                        D(bug(" mounting drive %d\n", info->num));
                        M68kRegisters r;
                        r.d[0] = info->num;
                        r.a[0] = 7;     // diskEvent
                        Execute68kTrap(0xa02f, &r);             // PostEvent()
                        info->to_be_mounted = false;
                }

                info = info->next;
        }
}


/*
 *  Driver Open() routine
 */

int16 DiskOpen(uint32 pb, uint32 dce)
{
        D(bug("DiskOpen\n"));

        // Set up DCE
        WriteMacInt32(dce + dCtlPosition, 0);
        acc_run_called = false;

        // Install drives
        for (DriveInfo *info = first_drive_info; info; info = info->next) {

                info->num = FindFreeDriveNumber(1);
                info->to_be_mounted = false;

                if (info->fh) {

                        // Allocate drive status record
                        M68kRegisters r;
                        r.d[0] = SIZEOF_DrvSts;
                        Execute68kTrap(0xa71e, &r);             // NewPtrSysClear()
                        if (r.a[0] == 0)
                                continue;
                        info->status = r.a[0];
                        D(bug(" DrvSts at %08lx\n", info->status));

                        // Set up drive status
                        WriteMacInt16(info->status + dsQType, hard20);
                        WriteMacInt8(info->status + dsInstalled, 1);
                        bool disk_in_place = false;
                        if (SysIsFixedDisk(info->fh)) {
                                WriteMacInt8(info->status + dsDiskInPlace, 8);  // Fixed disk
                                disk_in_place = true;
                        } else if (SysIsDiskInserted(info->fh)) {
                                WriteMacInt8(info->status + dsDiskInPlace, 1);  // Inserted removable disk
                                disk_in_place = true;
                        }
                        if (disk_in_place) {
                                D(bug(" disk inserted\n"));
                                WriteMacInt8(info->status + dsWriteProt, info->read_only ? 0x80 : 0);
                                info->num_blocks = SysGetFileSize(info->fh) / 512;
                                info->to_be_mounted = true;
                        }
                        D(bug(" %d blocks\n", info->num_blocks));
                        WriteMacInt16(info->status + dsDriveSize, info->num_blocks & 0xffff);
                        WriteMacInt16(info->status + dsDriveS1, info->num_blocks >> 16);

                        // Add drive to drive queue
                        D(bug(" adding drive %d\n", info->num));
                        r.d[0] = (info->num << 16) | (DiskRefNum & 0xffff);
                        r.a[0] = info->status + dsQLink;
                        Execute68kTrap(0xa04e, &r);     // AddDrive()
                }
        }
        return noErr;
}


/*
 *  Driver Prime() routine
 */

int16 DiskPrime(uint32 pb, uint32 dce)
{
        WriteMacInt32(pb + ioActCount, 0);

        // Drive valid and disk inserted?
        DriveInfo *info;
        if ((info = get_drive_info(ReadMacInt16(pb + ioVRefNum))) == NULL)
                return nsDrvErr;
        if (!ReadMacInt8(info->status + dsDiskInPlace))
                return offLinErr;

        // Get parameters
        void *buffer = Mac2HostAddr(ReadMacInt32(pb + ioBuffer));
        size_t length = ReadMacInt32(pb + ioReqCount);
        loff_t position = ReadMacInt32(dce + dCtlPosition);
        if (ReadMacInt16(pb + ioPosMode) & 0x100)       // 64 bit positioning
                position = ((loff_t)ReadMacInt32(pb + ioWPosOffset) << 32) || ReadMacInt32(pb + ioWPosOffset + 4);
        if ((length & 0x1ff) || (position & 0x1ff))
                return paramErr;

        size_t actual = 0;
        if ((ReadMacInt16(pb + ioTrap) & 0xff) == aRdCmd) {

                // Read
                actual = Sys_read(info->fh, buffer, position, length);
                if (actual != length)
                        return readErr;

        } else {

                // Write
                if (info->read_only)
                        return wPrErr;
                actual = Sys_write(info->fh, buffer, position, length);
                if (actual != length)
                        return writErr;
        }

        // Update ParamBlock and DCE
        WriteMacInt32(pb + ioActCount, actual);
        WriteMacInt32(dce + dCtlPosition, ReadMacInt32(dce + dCtlPosition) + actual);
        return noErr;
}


/*
 *  Driver Control() routine
 */

int16 DiskControl(uint32 pb, uint32 dce)
{
        uint16 code = ReadMacInt16(pb + csCode);
        D(bug("DiskControl %d\n", code));

        // General codes
        switch (code) {
                case 1:         // KillIO
                        return noErr;

                case 65: {      // Periodic action (accRun, "insert" disks on startup)
                        mount_mountable_volumes();
                        WriteMacInt16(dce + dCtlFlags, ReadMacInt16(dce + dCtlFlags) & ~0x2000);        // Disable periodic action
                        acc_run_called = true;
                        return noErr;
                }
        }

        // Drive valid?
        DriveInfo *info;
        if ((info = get_drive_info(ReadMacInt16(pb + ioVRefNum))) == NULL)
                return nsDrvErr;

        // Drive-specific codes
        switch (code) {
                case 5:         // Verify disk
                        if (ReadMacInt8(info->status + dsDiskInPlace) > 0)
                                return noErr;
                        else
                                return offLinErr;

                case 6:         // Format disk
                        if (info->read_only)
                                return wPrErr;
                        else if (ReadMacInt8(info->status + dsDiskInPlace) > 0)
                                return noErr;
                        else
                                return offLinErr;

                case 7:         // Eject disk
                        if (ReadMacInt8(info->status + dsDiskInPlace) == 8) {
                                // Fixed disk, re-insert
                                M68kRegisters r;
                                r.d[0] = info->num;
                                r.a[0] = 7;     // diskEvent
                                Execute68kTrap(0xa02f, &r);             // PostEvent()
                        } else if (ReadMacInt8(info->status + dsDiskInPlace) > 0) {
                                SysEject(info->fh);
                                WriteMacInt8(info->status + dsDiskInPlace, 0);
                        }
                        return noErr;

                case 21:        // Get drive icon
                case 22:        // Get disk icon
                        WriteMacInt32(pb + csParam, DiskIconAddr);
                        return noErr;

                case 23:        // Get drive info
                        if (ReadMacInt8(info->status + dsDiskInPlace) == 8)
                                WriteMacInt32(pb + csParam, 0x0601);    // Unspecified fixed SCSI disk
                        else
                                WriteMacInt32(pb + csParam, 0x0201);    // Unspecified SCSI disk
                        return noErr;

                case 24:        // Get partition size
                        if (ReadMacInt8(info->status + dsDiskInPlace) > 0) {
                                WriteMacInt32(pb + csParam, info->num_blocks);
                                return noErr;
                        } else
                                return offLinErr;

                default:
                        printf("WARNING: Unknown DiskControl(%d)\n", code);
                        return controlErr;
        }
}


/*
 *  Driver Status() routine
 */

int16 DiskStatus(uint32 pb, uint32 dce)
{
        DriveInfo *info = get_drive_info(ReadMacInt16(pb + ioVRefNum));
        uint16 code = ReadMacInt16(pb + csCode);
        D(bug("DiskStatus %d\n", code));

        // General codes
        switch (code) {
                case 43: {      // Driver gestalt
                        uint32 sel = ReadMacInt32(pb + csParam);
                        D(bug(" driver gestalt %c%c%c%c\n", sel >> 24, sel >> 16,  sel >> 8, sel));
                        switch (sel) {
                                case FOURCC('v','e','r','s'):   // Version
                                        WriteMacInt32(pb + csParam + 4, 0x01008000);
                                        break;
                                case FOURCC('d','e','v','t'):   // Device type
                                        if (info != NULL) {
                                                if (ReadMacInt8(info->status + dsDiskInPlace) == 8)
                                                        WriteMacInt32(pb + csParam + 4, FOURCC('d','i','s','k'));
                                                else
                                                        WriteMacInt32(pb + csParam + 4, FOURCC('r','d','s','k'));
                                        } else
                                                WriteMacInt32(pb + csParam + 4, FOURCC('d','i','s','k'));
                                        break;
                                case FOURCC('i','n','t','f'):   // Interface type
                                        WriteMacInt32(pb + csParam + 4, FOURCC('b','a','s','i'));
                                        break;
                                case FOURCC('s','y','n','c'):   // Only synchronous operation?
                                        WriteMacInt32(pb + csParam + 4, 0x01000000);
                                        break;
                                case FOURCC('b','o','o','t'):   // Boot ID
                                        if (info != NULL)
                                                WriteMacInt16(pb + csParam + 4, info->num);
                                        else
                                                WriteMacInt16(pb + csParam + 4, 0);
                                        WriteMacInt16(pb + csParam + 6, (uint16)DiskRefNum);
                                        break;
                                case FOURCC('w','i','d','e'):   // 64-bit access supported?
                                        WriteMacInt16(pb + csParam + 4, 0x0100);
                                        break;
                                case FOURCC('p','u','r','g'):   // Purge flags
                                        WriteMacInt32(pb + csParam + 4, 0);
                                        break;
                                case FOURCC('e','j','e','c'):   // Eject flags
                                        WriteMacInt32(pb + csParam + 4, 0x00030003);    // Don't eject on shutdown/restart
                                        break;
                                case FOURCC('f','l','u','s'):   // Flush flags
                                        WriteMacInt16(pb + csParam + 4, 0);
                                        break;
                                case FOURCC('v','m','o','p'):   // Virtual memory attributes
                                        WriteMacInt32(pb + csParam + 4, 0);     // Drive not available for VM
                                        break;
                                default:
                                        return statusErr;
                        }
                        return noErr;
                }
        }

        // Drive valid?
        if (info == NULL)
                return nsDrvErr;

        // Drive-specific codes
        switch (code) {
                case 8:         // Get drive status
                        Mac2Mac_memcpy(pb + csParam, info->status, 22);
                        return noErr;

                default:
                        printf("WARNING: Unknown DiskStatus(%d)\n", code);
                        return statusErr;
        }
}


/*
 *  Driver interrupt routine (1Hz) - check for volumes to be mounted
 */

void DiskInterrupt(void)
{
        if (!acc_run_called)
                return;

        mount_mountable_volumes();
}
Revision:	1.7
Committed:	2000-07-22T16:07:15Z (23 years, 9 months ago) by cebix
Branch:	MAIN
Changes since 1.6:	+14 -14 lines
Log Message:	- new FOURCC() macro in macos_util.h
#	User	Rev	Content
1	cebix	1.1	/*
2			* disk.cpp - Generic disk driver
3			*
4	cebix	1.5	* Basilisk II (C) 1997-2000 Christian Bauer
5	cebix	1.1	*
6			* This program is free software; you can redistribute it and/or modify
7			* it under the terms of the GNU General Public License as published by
8			* the Free Software Foundation; either version 2 of the License, or
9			* (at your option) any later version.
10			*
11			* This program is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			* GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with this program; if not, write to the Free Software
18			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19			*/
20
21			/*
22			* SEE ALSO
23			* Inside Macintosh: Devices, chapter 1 "Device Manager"
24			* Technote DV 05: "Drive Queue Elements"
25			* Technote DV 23: "Driver Education"
26			* Technote FL 24: "Don't Look at ioPosOffset for Devices"
27			*/
28
29			#include <string.h>
30
31			#include "sysdeps.h"
32			#include "cpu_emulation.h"
33			#include "main.h"
34			#include "macos_util.h"
35			#include "sys.h"
36			#include "prefs.h"
37			#include "disk.h"
38
39			#define DEBUG 0
40			#include "debug.h"
41
42
43			// .Disk Disk/drive icon
44			const uint8 DiskIcon[258] = {
45			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
46			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
47			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
48			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
49			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7f, 0xff, 0xff, 0xfe,
50			0x80, 0x00, 0x00, 0x01, 0x80, 0x00, 0x00, 0x01, 0x80, 0x00, 0x00, 0x01, 0x80, 0x00, 0x00, 0x01,
51			0x80, 0x00, 0x00, 0x01, 0x8c, 0x00, 0x00, 0x01, 0x80, 0x00, 0x00, 0x01, 0x80, 0x00, 0x00, 0x01,
52			0x7f, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
53
54			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
55			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
56			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
57			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
58			0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7f, 0xff, 0xff, 0xfe,
59			0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
60			0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
61			0x7f, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
62
63			0, 0
64			};
65
66
67			// Struct for each drive
68			struct DriveInfo {
69			DriveInfo()
70			{
71			next = NULL;
72			num = 0;
73			fh = NULL;
74			read_only = false;
75			status = 0;
76			}
77
78			DriveInfo *next; // Pointer to next DriveInfo (must be first in struct!)
79			int num; // Drive number
80			void *fh; // File handle
81			uint32 num_blocks; // Size in 512-byte blocks
82			bool to_be_mounted; // Flag: drive must be mounted in accRun
83			bool read_only; // Flag: force write protection
84			uint32 status; // Mac address of drive status record
85			};
86
87			// Linked list of DriveInfos
88			static DriveInfo *first_drive_info;
89
90			// Icon address (Mac address space, set by PatchROM())
91			uint32 DiskIconAddr;
92
93	cebix	1.2	// Flag: Control(accRun) has been called, interrupt routine is now active
94			static bool acc_run_called = false;
95
96	cebix	1.1
97			/*
98			* Get pointer to drive info, NULL = invalid drive number
99			*/
100
101			static DriveInfo *get_drive_info(int num)
102			{
103			DriveInfo *info = first_drive_info;
104			while (info != NULL) {
105			if (info->num == num)
106			return info;
107			info = info->next;
108			}
109			return NULL;
110			}
111
112
113			/*
114			* Initialization
115			*/
116
117			void DiskInit(void)
118			{
119			first_drive_info = NULL;
120
121			// No drives specified in prefs? Then add defaults
122			if (PrefsFindString("disk", 0) == NULL)
123			SysAddDiskPrefs();
124
125			// Add drives specified in preferences
126			int32 index = 0;
127			const char *str;
128			while ((str = PrefsFindString("disk", index++)) != NULL) {
129			bool read_only = false;
130			if (str[0] == '*') {
131			read_only = true;
132			str++;
133			}
134			void *fh = Sys_open(str, read_only);
135			if (fh) {
136			D(bug(" adding drive '%s'\n", str));
137			DriveInfo *info = new DriveInfo;
138			info->fh = fh;
139			info->read_only = SysIsReadOnly(fh);
140			DriveInfo p = (DriveInfo )&first_drive_info;
141			while (p->next != NULL)
142			p = p->next;
143			p->next = info;
144			}
145			}
146			}
147
148
149			/*
150			* Deinitialization
151			*/
152
153			void DiskExit(void)
154			{
155			DriveInfo info = first_drive_info, next;
156			while (info != NULL) {
157			Sys_close(info->fh);
158			next = info->next;
159			delete info;
160			info = next;
161			}
162			}
163
164
165			/*
166			* Disk was inserted, flag for mounting
167			*/
168
169			bool DiskMountVolume(void *fh)
170			{
171			DriveInfo *info;
172			for (info = first_drive_info; info != NULL && info->fh != fh; info = info->next) ;
173			if (info) {
174			if (SysIsDiskInserted(info->fh)) {
175			info->read_only = SysIsReadOnly(info->fh);
176			WriteMacInt8(info->status + dsDiskInPlace, 1); // Inserted removable disk
177			WriteMacInt8(info->status + dsWriteProt, info->read_only ? 0xff : 0);
178			info->num_blocks = SysGetFileSize(info->fh) / 512;
179			WriteMacInt16(info->status + dsDriveSize, info->num_blocks & 0xffff);
180			WriteMacInt16(info->status + dsDriveS1, info->num_blocks >> 16);
181			info->to_be_mounted = true;
182			}
183			return true;
184			} else
185			return false;
186			}
187
188
189			/*
190	cebix	1.2	* Mount volumes for which the to_be_mounted flag is set
191			* (called during interrupt time)
192			*/
193
194			static void mount_mountable_volumes(void)
195			{
196			DriveInfo *info = first_drive_info;
197			while (info != NULL) {
198
199			// Disk in drive?
200			if (!ReadMacInt8(info->status + dsDiskInPlace)) {
201
202			// No, check if disk was inserted
203			if (SysIsDiskInserted(info->fh))
204			DiskMountVolume(info->fh);
205			}
206
207			// Mount disk if flagged
208			if (info->to_be_mounted) {
209			D(bug(" mounting drive %d\n", info->num));
210			M68kRegisters r;
211			r.d[0] = info->num;
212			r.a[0] = 7; // diskEvent
213			Execute68kTrap(0xa02f, &r); // PostEvent()
214			info->to_be_mounted = false;
215			}
216
217			info = info->next;
218			}
219			}
220
221
222			/*
223	cebix	1.1	* Driver Open() routine
224			*/
225
226			int16 DiskOpen(uint32 pb, uint32 dce)
227			{
228			D(bug("DiskOpen\n"));
229
230			// Set up DCE
231			WriteMacInt32(dce + dCtlPosition, 0);
232	cebix	1.2	acc_run_called = false;
233	cebix	1.1
234			// Install drives
235			for (DriveInfo *info = first_drive_info; info; info = info->next) {
236
237			info->num = FindFreeDriveNumber(1);
238			info->to_be_mounted = false;
239
240			if (info->fh) {
241
242			// Allocate drive status record
243			M68kRegisters r;
244			r.d[0] = SIZEOF_DrvSts;
245			Execute68kTrap(0xa71e, &r); // NewPtrSysClear()
246			if (r.a[0] == 0)
247			continue;
248			info->status = r.a[0];
249			D(bug(" DrvSts at %08lx\n", info->status));
250
251			// Set up drive status
252			WriteMacInt16(info->status + dsQType, hard20);
253			WriteMacInt8(info->status + dsInstalled, 1);
254			bool disk_in_place = false;
255			if (SysIsFixedDisk(info->fh)) {
256			WriteMacInt8(info->status + dsDiskInPlace, 8); // Fixed disk
257			disk_in_place = true;
258			} else if (SysIsDiskInserted(info->fh)) {
259			WriteMacInt8(info->status + dsDiskInPlace, 1); // Inserted removable disk
260			disk_in_place = true;
261			}
262			if (disk_in_place) {
263			D(bug(" disk inserted\n"));
264			WriteMacInt8(info->status + dsWriteProt, info->read_only ? 0x80 : 0);
265			info->num_blocks = SysGetFileSize(info->fh) / 512;
266			info->to_be_mounted = true;
267			}
268	cebix	1.3	D(bug(" %d blocks\n", info->num_blocks));
269	cebix	1.1	WriteMacInt16(info->status + dsDriveSize, info->num_blocks & 0xffff);
270			WriteMacInt16(info->status + dsDriveS1, info->num_blocks >> 16);
271
272			// Add drive to drive queue
273			D(bug(" adding drive %d\n", info->num));
274			r.d[0] = (info->num << 16) \| (DiskRefNum & 0xffff);
275			r.a[0] = info->status + dsQLink;
276			Execute68kTrap(0xa04e, &r); // AddDrive()
277			}
278			}
279			return noErr;
280			}
281
282
283			/*
284			* Driver Prime() routine
285			*/
286
287			int16 DiskPrime(uint32 pb, uint32 dce)
288			{
289			WriteMacInt32(pb + ioActCount, 0);
290
291			// Drive valid and disk inserted?
292			DriveInfo *info;
293			if ((info = get_drive_info(ReadMacInt16(pb + ioVRefNum))) == NULL)
294			return nsDrvErr;
295			if (!ReadMacInt8(info->status + dsDiskInPlace))
296			return offLinErr;
297
298			// Get parameters
299			void *buffer = Mac2HostAddr(ReadMacInt32(pb + ioBuffer));
300			size_t length = ReadMacInt32(pb + ioReqCount);
301			loff_t position = ReadMacInt32(dce + dCtlPosition);
302			if (ReadMacInt16(pb + ioPosMode) & 0x100) // 64 bit positioning
303			position = ((loff_t)ReadMacInt32(pb + ioWPosOffset) << 32) \|\| ReadMacInt32(pb + ioWPosOffset + 4);
304			if ((length & 0x1ff) \|\| (position & 0x1ff))
305			return paramErr;
306
307			size_t actual = 0;
308			if ((ReadMacInt16(pb + ioTrap) & 0xff) == aRdCmd) {
309
310			// Read
311			actual = Sys_read(info->fh, buffer, position, length);
312			if (actual != length)
313			return readErr;
314
315			} else {
316
317			// Write
318			if (info->read_only)
319			return wPrErr;
320			actual = Sys_write(info->fh, buffer, position, length);
321			if (actual != length)
322			return writErr;
323			}
324
325			// Update ParamBlock and DCE
326			WriteMacInt32(pb + ioActCount, actual);
327			WriteMacInt32(dce + dCtlPosition, ReadMacInt32(dce + dCtlPosition) + actual);
328			return noErr;
329			}
330
331
332			/*
333			* Driver Control() routine
334			*/
335
336			int16 DiskControl(uint32 pb, uint32 dce)
337			{
338			uint16 code = ReadMacInt16(pb + csCode);
339			D(bug("DiskControl %d\n", code));
340
341			// General codes
342			switch (code) {
343			case 1: // KillIO
344			return noErr;
345
346	cebix	1.2	case 65: { // Periodic action (accRun, "insert" disks on startup)
347			mount_mountable_volumes();
348			WriteMacInt16(dce + dCtlFlags, ReadMacInt16(dce + dCtlFlags) & ~0x2000); // Disable periodic action
349			acc_run_called = true;
350	cebix	1.1	return noErr;
351			}
352			}
353
354			// Drive valid?
355			DriveInfo *info;
356			if ((info = get_drive_info(ReadMacInt16(pb + ioVRefNum))) == NULL)
357			return nsDrvErr;
358
359			// Drive-specific codes
360			switch (code) {
361			case 5: // Verify disk
362			if (ReadMacInt8(info->status + dsDiskInPlace) > 0)
363			return noErr;
364			else
365			return offLinErr;
366
367			case 6: // Format disk
368			if (info->read_only)
369			return wPrErr;
370			else if (ReadMacInt8(info->status + dsDiskInPlace) > 0)
371			return noErr;
372			else
373			return offLinErr;
374
375			case 7: // Eject disk
376			if (ReadMacInt8(info->status + dsDiskInPlace) == 8) {
377			// Fixed disk, re-insert
378			M68kRegisters r;
379			r.d[0] = info->num;
380			r.a[0] = 7; // diskEvent
381			Execute68kTrap(0xa02f, &r); // PostEvent()
382			} else if (ReadMacInt8(info->status + dsDiskInPlace) > 0) {
383			SysEject(info->fh);
384			WriteMacInt8(info->status + dsDiskInPlace, 0);
385			}
386			return noErr;
387
388			case 21: // Get drive icon
389			case 22: // Get disk icon
390			WriteMacInt32(pb + csParam, DiskIconAddr);
391			return noErr;
392
393			case 23: // Get drive info
394			if (ReadMacInt8(info->status + dsDiskInPlace) == 8)
395			WriteMacInt32(pb + csParam, 0x0601); // Unspecified fixed SCSI disk
396			else
397			WriteMacInt32(pb + csParam, 0x0201); // Unspecified SCSI disk
398			return noErr;
399
400			case 24: // Get partition size
401			if (ReadMacInt8(info->status + dsDiskInPlace) > 0) {
402			WriteMacInt32(pb + csParam, info->num_blocks);
403			return noErr;
404			} else
405			return offLinErr;
406
407			default:
408			printf("WARNING: Unknown DiskControl(%d)\n", code);
409			return controlErr;
410			}
411			}
412
413
414			/*
415			* Driver Status() routine
416			*/
417
418			int16 DiskStatus(uint32 pb, uint32 dce)
419			{
420			DriveInfo *info = get_drive_info(ReadMacInt16(pb + ioVRefNum));
421			uint16 code = ReadMacInt16(pb + csCode);
422			D(bug("DiskStatus %d\n", code));
423
424			// General codes
425			switch (code) {
426			case 43: { // Driver gestalt
427			uint32 sel = ReadMacInt32(pb + csParam);
428			D(bug(" driver gestalt %c%c%c%c\n", sel >> 24, sel >> 16, sel >> 8, sel));
429			switch (sel) {
430	cebix	1.7	case FOURCC('v','e','r','s'): // Version
431	cebix	1.1	WriteMacInt32(pb + csParam + 4, 0x01008000);
432			break;
433	cebix	1.7	case FOURCC('d','e','v','t'): // Device type
434	cebix	1.1	if (info != NULL) {
435			if (ReadMacInt8(info->status + dsDiskInPlace) == 8)
436	cebix	1.7	WriteMacInt32(pb + csParam + 4, FOURCC('d','i','s','k'));
437	cebix	1.1	else
438	cebix	1.7	WriteMacInt32(pb + csParam + 4, FOURCC('r','d','s','k'));
439	cebix	1.1	} else
440	cebix	1.7	WriteMacInt32(pb + csParam + 4, FOURCC('d','i','s','k'));
441	cebix	1.1	break;
442	cebix	1.7	case FOURCC('i','n','t','f'): // Interface type
443			WriteMacInt32(pb + csParam + 4, FOURCC('b','a','s','i'));
444	cebix	1.1	break;
445	cebix	1.7	case FOURCC('s','y','n','c'): // Only synchronous operation?
446	cebix	1.1	WriteMacInt32(pb + csParam + 4, 0x01000000);
447			break;
448	cebix	1.7	case FOURCC('b','o','o','t'): // Boot ID
449	cebix	1.1	if (info != NULL)
450			WriteMacInt16(pb + csParam + 4, info->num);
451			else
452			WriteMacInt16(pb + csParam + 4, 0);
453			WriteMacInt16(pb + csParam + 6, (uint16)DiskRefNum);
454			break;
455	cebix	1.7	case FOURCC('w','i','d','e'): // 64-bit access supported?
456	cebix	1.1	WriteMacInt16(pb + csParam + 4, 0x0100);
457			break;
458	cebix	1.7	case FOURCC('p','u','r','g'): // Purge flags
459	cebix	1.1	WriteMacInt32(pb + csParam + 4, 0);
460			break;
461	cebix	1.7	case FOURCC('e','j','e','c'): // Eject flags
462	cebix	1.1	WriteMacInt32(pb + csParam + 4, 0x00030003); // Don't eject on shutdown/restart
463			break;
464	cebix	1.7	case FOURCC('f','l','u','s'): // Flush flags
465	cebix	1.1	WriteMacInt16(pb + csParam + 4, 0);
466			break;
467	cebix	1.7	case FOURCC('v','m','o','p'): // Virtual memory attributes
468	cebix	1.1	WriteMacInt32(pb + csParam + 4, 0); // Drive not available for VM
469			break;
470			default:
471			return statusErr;
472			}
473			return noErr;
474			}
475			}
476
477			// Drive valid?
478			if (info == NULL)
479			return nsDrvErr;
480
481			// Drive-specific codes
482			switch (code) {
483			case 8: // Get drive status
484	cebix	1.4	Mac2Mac_memcpy(pb + csParam, info->status, 22);
485	cebix	1.1	return noErr;
486
487			default:
488			printf("WARNING: Unknown DiskStatus(%d)\n", code);
489			return statusErr;
490	cebix	1.2	}
491			}
492
493
494			/*
495	cebix	1.6	* Driver interrupt routine (1Hz) - check for volumes to be mounted
496	cebix	1.2	*/
497
498			void DiskInterrupt(void)
499			{
500			if (!acc_run_called)
501			return;
502
503	cebix	1.6	mount_mountable_volumes();
504	cebix	1.1	}