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, EMULATOR_ID_4);
                                        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:	1.8
Committed:	2000-07-25T15:19:39Z (24 years, 3 months ago) by cebix
Branch:	MAIN
Changes since 1.7:	+1 -1 lines
Log Message:	- more cleanups - splitted prefs.cpp into prefs.cpp and prefs_items.cpp to make prefs.cpp reusable for other projects
#	Content
1	/*
2	* disk.cpp - Generic disk driver
3	*
4	* Basilisk II (C) 1997-2000 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	// Flag: Control(accRun) has been called, interrupt routine is now active
94	static bool acc_run_called = false;
95
96
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	* 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	* 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	acc_run_called = false;
233
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	D(bug(" %d blocks\n", info->num_blocks));
269	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	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	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	case FOURCC('v','e','r','s'): // Version
431	WriteMacInt32(pb + csParam + 4, 0x01008000);
432	break;
433	case FOURCC('d','e','v','t'): // Device type
434	if (info != NULL) {
435	if (ReadMacInt8(info->status + dsDiskInPlace) == 8)
436	WriteMacInt32(pb + csParam + 4, FOURCC('d','i','s','k'));
437	else
438	WriteMacInt32(pb + csParam + 4, FOURCC('r','d','s','k'));
439	} else
440	WriteMacInt32(pb + csParam + 4, FOURCC('d','i','s','k'));
441	break;
442	case FOURCC('i','n','t','f'): // Interface type
443	WriteMacInt32(pb + csParam + 4, EMULATOR_ID_4);
444	break;
445	case FOURCC('s','y','n','c'): // Only synchronous operation?
446	WriteMacInt32(pb + csParam + 4, 0x01000000);
447	break;
448	case FOURCC('b','o','o','t'): // Boot ID
449	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	case FOURCC('w','i','d','e'): // 64-bit access supported?
456	WriteMacInt16(pb + csParam + 4, 0x0100);
457	break;
458	case FOURCC('p','u','r','g'): // Purge flags
459	WriteMacInt32(pb + csParam + 4, 0);
460	break;
461	case FOURCC('e','j','e','c'): // Eject flags
462	WriteMacInt32(pb + csParam + 4, 0x00030003); // Don't eject on shutdown/restart
463	break;
464	case FOURCC('f','l','u','s'): // Flush flags
465	WriteMacInt16(pb + csParam + 4, 0);
466	break;
467	case FOURCC('v','m','o','p'): // Virtual memory attributes
468	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	Mac2Mac_memcpy(pb + csParam, info->status, 22);
485	return noErr;
486
487	default:
488	printf("WARNING: Unknown DiskStatus(%d)\n", code);
489	return statusErr;
490	}
491	}
492
493
494	/*
495	* Driver interrupt routine (1Hz) - check for volumes to be mounted
496	*/
497
498	void DiskInterrupt(void)
499	{
500	if (!acc_run_called)
501	return;
502
503	mount_mountable_volumes();
504	}