BasiliskII/src/disk.cpp

/*
 *  disk.cpp - Generic disk driver
 *
 *  Basilisk II (C) 1997-1999 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;

// Number of ticks between checks for disk insertion
const int driver_delay = 120;

// 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(" %ld 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 'vers':    // Version
                                        WriteMacInt32(pb + csParam + 4, 0x01008000);
                                        break;
                                case 'devt':    // Device type
                                        if (info != NULL) {
                                                if (ReadMacInt8(info->status + dsDiskInPlace) == 8)
                                                        WriteMacInt32(pb + csParam + 4, 'disk');
                                                else
                                                        WriteMacInt32(pb + csParam + 4, 'rdsk');
                                        } else
                                                WriteMacInt32(pb + csParam + 4, 'disk');
                                        break;
                                case 'intf':    // Interface type
                                        WriteMacInt32(pb + csParam + 4, 'basi');
                                        break;
                                case 'sync':    // Only synchronous operation?
                                        WriteMacInt32(pb + csParam + 4, 0x01000000);
                                        break;
                                case 'boot':    // 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 'wide':    // 64-bit access supported?
                                        WriteMacInt16(pb + csParam + 4, 0x0100);
                                        break;
                                case 'purg':    // Purge flags
                                        WriteMacInt32(pb + csParam + 4, 0);
                                        break;
                                case 'ejec':    // Eject flags
                                        WriteMacInt32(pb + csParam + 4, 0x00030003);    // Don't eject on shutdown/restart
                                        break;
                                case 'flus':    // Flush flags
                                        WriteMacInt16(pb + csParam + 4, 0);
                                        break;
                                case 'vmop':    // 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
                        memcpy(Mac2HostAddr(pb + csParam), Mac2HostAddr(info->status), 22);
                        return noErr;

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


/*
 *  Driver interrupt routine - check for volumes to be mounted
 */

void DiskInterrupt(void)
{
        static int tick_count = 0;
        if (!acc_run_called)
                return;

        tick_count++;
        if (tick_count > driver_delay) {
                tick_count = 0;
                mount_mountable_volumes();
        }
}
Revision:	1.2
Committed:	1999-10-12T20:00:43Z (25 years ago) by cebix
Branch:	MAIN
CVS Tags:	snapshot-21101999
Changes since 1.1:	+62 -24 lines
Log Message:	- disk insertions are now checked for by the 60Hz interrupt routine - localizable strings are split into a common and a platform-specific set - fixed bug in CR->LF translation in AmigaOS/clip_amiga.cpp
#	Content
1	/*
2	* disk.cpp - Generic disk driver
3	*
4	* Basilisk II (C) 1997-1999 Christian Bauer
5	*
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	// Number of ticks between checks for disk insertion
94	const int driver_delay = 120;
95
96	// Flag: Control(accRun) has been called, interrupt routine is now active
97	static bool acc_run_called = false;
98
99
100	/*
101	* Get pointer to drive info, NULL = invalid drive number
102	*/
103
104	static DriveInfo *get_drive_info(int num)
105	{
106	DriveInfo *info = first_drive_info;
107	while (info != NULL) {
108	if (info->num == num)
109	return info;
110	info = info->next;
111	}
112	return NULL;
113	}
114
115
116	/*
117	* Initialization
118	*/
119
120	void DiskInit(void)
121	{
122	first_drive_info = NULL;
123
124	// No drives specified in prefs? Then add defaults
125	if (PrefsFindString("disk", 0) == NULL)
126	SysAddDiskPrefs();
127
128	// Add drives specified in preferences
129	int32 index = 0;
130	const char *str;
131	while ((str = PrefsFindString("disk", index++)) != NULL) {
132	bool read_only = false;
133	if (str[0] == '*') {
134	read_only = true;
135	str++;
136	}
137	void *fh = Sys_open(str, read_only);
138	if (fh) {
139	D(bug(" adding drive '%s'\n", str));
140	DriveInfo *info = new DriveInfo;
141	info->fh = fh;
142	info->read_only = SysIsReadOnly(fh);
143	DriveInfo p = (DriveInfo )&first_drive_info;
144	while (p->next != NULL)
145	p = p->next;
146	p->next = info;
147	}
148	}
149	}
150
151
152	/*
153	* Deinitialization
154	*/
155
156	void DiskExit(void)
157	{
158	DriveInfo info = first_drive_info, next;
159	while (info != NULL) {
160	Sys_close(info->fh);
161	next = info->next;
162	delete info;
163	info = next;
164	}
165	}
166
167
168	/*
169	* Disk was inserted, flag for mounting
170	*/
171
172	bool DiskMountVolume(void *fh)
173	{
174	DriveInfo *info;
175	for (info = first_drive_info; info != NULL && info->fh != fh; info = info->next) ;
176	if (info) {
177	if (SysIsDiskInserted(info->fh)) {
178	info->read_only = SysIsReadOnly(info->fh);
179	WriteMacInt8(info->status + dsDiskInPlace, 1); // Inserted removable disk
180	WriteMacInt8(info->status + dsWriteProt, info->read_only ? 0xff : 0);
181	info->num_blocks = SysGetFileSize(info->fh) / 512;
182	WriteMacInt16(info->status + dsDriveSize, info->num_blocks & 0xffff);
183	WriteMacInt16(info->status + dsDriveS1, info->num_blocks >> 16);
184	info->to_be_mounted = true;
185	}
186	return true;
187	} else
188	return false;
189	}
190
191
192	/*
193	* Mount volumes for which the to_be_mounted flag is set
194	* (called during interrupt time)
195	*/
196
197	static void mount_mountable_volumes(void)
198	{
199	DriveInfo *info = first_drive_info;
200	while (info != NULL) {
201
202	// Disk in drive?
203	if (!ReadMacInt8(info->status + dsDiskInPlace)) {
204
205	// No, check if disk was inserted
206	if (SysIsDiskInserted(info->fh))
207	DiskMountVolume(info->fh);
208	}
209
210	// Mount disk if flagged
211	if (info->to_be_mounted) {
212	D(bug(" mounting drive %d\n", info->num));
213	M68kRegisters r;
214	r.d[0] = info->num;
215	r.a[0] = 7; // diskEvent
216	Execute68kTrap(0xa02f, &r); // PostEvent()
217	info->to_be_mounted = false;
218	}
219
220	info = info->next;
221	}
222	}
223
224
225	/*
226	* Driver Open() routine
227	*/
228
229	int16 DiskOpen(uint32 pb, uint32 dce)
230	{
231	D(bug("DiskOpen\n"));
232
233	// Set up DCE
234	WriteMacInt32(dce + dCtlPosition, 0);
235	acc_run_called = false;
236
237	// Install drives
238	for (DriveInfo *info = first_drive_info; info; info = info->next) {
239
240	info->num = FindFreeDriveNumber(1);
241	info->to_be_mounted = false;
242
243	if (info->fh) {
244
245	// Allocate drive status record
246	M68kRegisters r;
247	r.d[0] = SIZEOF_DrvSts;
248	Execute68kTrap(0xa71e, &r); // NewPtrSysClear()
249	if (r.a[0] == 0)
250	continue;
251	info->status = r.a[0];
252	D(bug(" DrvSts at %08lx\n", info->status));
253
254	// Set up drive status
255	WriteMacInt16(info->status + dsQType, hard20);
256	WriteMacInt8(info->status + dsInstalled, 1);
257	bool disk_in_place = false;
258	if (SysIsFixedDisk(info->fh)) {
259	WriteMacInt8(info->status + dsDiskInPlace, 8); // Fixed disk
260	disk_in_place = true;
261	} else if (SysIsDiskInserted(info->fh)) {
262	WriteMacInt8(info->status + dsDiskInPlace, 1); // Inserted removable disk
263	disk_in_place = true;
264	}
265	if (disk_in_place) {
266	D(bug(" disk inserted\n"));
267	WriteMacInt8(info->status + dsWriteProt, info->read_only ? 0x80 : 0);
268	info->num_blocks = SysGetFileSize(info->fh) / 512;
269	info->to_be_mounted = true;
270	}
271	D(bug(" %ld blocks\n", info->num_blocks));
272	WriteMacInt16(info->status + dsDriveSize, info->num_blocks & 0xffff);
273	WriteMacInt16(info->status + dsDriveS1, info->num_blocks >> 16);
274
275	// Add drive to drive queue
276	D(bug(" adding drive %d\n", info->num));
277	r.d[0] = (info->num << 16) \| (DiskRefNum & 0xffff);
278	r.a[0] = info->status + dsQLink;
279	Execute68kTrap(0xa04e, &r); // AddDrive()
280	}
281	}
282	return noErr;
283	}
284
285
286	/*
287	* Driver Prime() routine
288	*/
289
290	int16 DiskPrime(uint32 pb, uint32 dce)
291	{
292	WriteMacInt32(pb + ioActCount, 0);
293
294	// Drive valid and disk inserted?
295	DriveInfo *info;
296	if ((info = get_drive_info(ReadMacInt16(pb + ioVRefNum))) == NULL)
297	return nsDrvErr;
298	if (!ReadMacInt8(info->status + dsDiskInPlace))
299	return offLinErr;
300
301	// Get parameters
302	void *buffer = Mac2HostAddr(ReadMacInt32(pb + ioBuffer));
303	size_t length = ReadMacInt32(pb + ioReqCount);
304	loff_t position = ReadMacInt32(dce + dCtlPosition);
305	if (ReadMacInt16(pb + ioPosMode) & 0x100) // 64 bit positioning
306	position = ((loff_t)ReadMacInt32(pb + ioWPosOffset) << 32) \|\| ReadMacInt32(pb + ioWPosOffset + 4);
307	if ((length & 0x1ff) \|\| (position & 0x1ff))
308	return paramErr;
309
310	size_t actual = 0;
311	if ((ReadMacInt16(pb + ioTrap) & 0xff) == aRdCmd) {
312
313	// Read
314	actual = Sys_read(info->fh, buffer, position, length);
315	if (actual != length)
316	return readErr;
317
318	} else {
319
320	// Write
321	if (info->read_only)
322	return wPrErr;
323	actual = Sys_write(info->fh, buffer, position, length);
324	if (actual != length)
325	return writErr;
326	}
327
328	// Update ParamBlock and DCE
329	WriteMacInt32(pb + ioActCount, actual);
330	WriteMacInt32(dce + dCtlPosition, ReadMacInt32(dce + dCtlPosition) + actual);
331	return noErr;
332	}
333
334
335	/*
336	* Driver Control() routine
337	*/
338
339	int16 DiskControl(uint32 pb, uint32 dce)
340	{
341	uint16 code = ReadMacInt16(pb + csCode);
342	D(bug("DiskControl %d\n", code));
343
344	// General codes
345	switch (code) {
346	case 1: // KillIO
347	return noErr;
348
349	case 65: { // Periodic action (accRun, "insert" disks on startup)
350	mount_mountable_volumes();
351	WriteMacInt16(dce + dCtlFlags, ReadMacInt16(dce + dCtlFlags) & ~0x2000); // Disable periodic action
352	acc_run_called = true;
353	return noErr;
354	}
355	}
356
357	// Drive valid?
358	DriveInfo *info;
359	if ((info = get_drive_info(ReadMacInt16(pb + ioVRefNum))) == NULL)
360	return nsDrvErr;
361
362	// Drive-specific codes
363	switch (code) {
364	case 5: // Verify disk
365	if (ReadMacInt8(info->status + dsDiskInPlace) > 0)
366	return noErr;
367	else
368	return offLinErr;
369
370	case 6: // Format disk
371	if (info->read_only)
372	return wPrErr;
373	else if (ReadMacInt8(info->status + dsDiskInPlace) > 0)
374	return noErr;
375	else
376	return offLinErr;
377
378	case 7: // Eject disk
379	if (ReadMacInt8(info->status + dsDiskInPlace) == 8) {
380	// Fixed disk, re-insert
381	M68kRegisters r;
382	r.d[0] = info->num;
383	r.a[0] = 7; // diskEvent
384	Execute68kTrap(0xa02f, &r); // PostEvent()
385	} else if (ReadMacInt8(info->status + dsDiskInPlace) > 0) {
386	SysEject(info->fh);
387	WriteMacInt8(info->status + dsDiskInPlace, 0);
388	}
389	return noErr;
390
391	case 21: // Get drive icon
392	case 22: // Get disk icon
393	WriteMacInt32(pb + csParam, DiskIconAddr);
394	return noErr;
395
396	case 23: // Get drive info
397	if (ReadMacInt8(info->status + dsDiskInPlace) == 8)
398	WriteMacInt32(pb + csParam, 0x0601); // Unspecified fixed SCSI disk
399	else
400	WriteMacInt32(pb + csParam, 0x0201); // Unspecified SCSI disk
401	return noErr;
402
403	case 24: // Get partition size
404	if (ReadMacInt8(info->status + dsDiskInPlace) > 0) {
405	WriteMacInt32(pb + csParam, info->num_blocks);
406	return noErr;
407	} else
408	return offLinErr;
409
410	default:
411	printf("WARNING: Unknown DiskControl(%d)\n", code);
412	return controlErr;
413	}
414	}
415
416
417	/*
418	* Driver Status() routine
419	*/
420
421	int16 DiskStatus(uint32 pb, uint32 dce)
422	{
423	DriveInfo *info = get_drive_info(ReadMacInt16(pb + ioVRefNum));
424	uint16 code = ReadMacInt16(pb + csCode);
425	D(bug("DiskStatus %d\n", code));
426
427	// General codes
428	switch (code) {
429	case 43: { // Driver gestalt
430	uint32 sel = ReadMacInt32(pb + csParam);
431	D(bug(" driver gestalt %c%c%c%c\n", sel >> 24, sel >> 16, sel >> 8, sel));
432	switch (sel) {
433	case 'vers': // Version
434	WriteMacInt32(pb + csParam + 4, 0x01008000);
435	break;
436	case 'devt': // Device type
437	if (info != NULL) {
438	if (ReadMacInt8(info->status + dsDiskInPlace) == 8)
439	WriteMacInt32(pb + csParam + 4, 'disk');
440	else
441	WriteMacInt32(pb + csParam + 4, 'rdsk');
442	} else
443	WriteMacInt32(pb + csParam + 4, 'disk');
444	break;
445	case 'intf': // Interface type
446	WriteMacInt32(pb + csParam + 4, 'basi');
447	break;
448	case 'sync': // Only synchronous operation?
449	WriteMacInt32(pb + csParam + 4, 0x01000000);
450	break;
451	case 'boot': // Boot ID
452	if (info != NULL)
453	WriteMacInt16(pb + csParam + 4, info->num);
454	else
455	WriteMacInt16(pb + csParam + 4, 0);
456	WriteMacInt16(pb + csParam + 6, (uint16)DiskRefNum);
457	break;
458	case 'wide': // 64-bit access supported?
459	WriteMacInt16(pb + csParam + 4, 0x0100);
460	break;
461	case 'purg': // Purge flags
462	WriteMacInt32(pb + csParam + 4, 0);
463	break;
464	case 'ejec': // Eject flags
465	WriteMacInt32(pb + csParam + 4, 0x00030003); // Don't eject on shutdown/restart
466	break;
467	case 'flus': // Flush flags
468	WriteMacInt16(pb + csParam + 4, 0);
469	break;
470	case 'vmop': // Virtual memory attributes
471	WriteMacInt32(pb + csParam + 4, 0); // Drive not available for VM
472	break;
473	default:
474	return statusErr;
475	}
476	return noErr;
477	}
478	}
479
480	// Drive valid?
481	if (info == NULL)
482	return nsDrvErr;
483
484	// Drive-specific codes
485	switch (code) {
486	case 8: // Get drive status
487	memcpy(Mac2HostAddr(pb + csParam), Mac2HostAddr(info->status), 22);
488	return noErr;
489
490	default:
491	printf("WARNING: Unknown DiskStatus(%d)\n", code);
492	return statusErr;
493	}
494	}
495
496
497	/*
498	* Driver interrupt routine - check for volumes to be mounted
499	*/
500
501	void DiskInterrupt(void)
502	{
503	static int tick_count = 0;
504	if (!acc_run_called)
505	return;
506
507	tick_count++;
508	if (tick_count > driver_delay) {
509	tick_count = 0;
510	mount_mountable_volumes();
511	}
512	}