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;


/*
 *  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;
}


/*
 *  Driver Open() routine
 */

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

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

        // 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 ("insert" disks on startup and check for disk changes)
                        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;
                        }
                        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;
        }
}
Revision:	1.1.1.1 (vendor branch)
Committed:	1999-10-03T14:16:25Z (25 years, 1 month ago) by cebix
Branch:	cebix
CVS Tags:	release-0_7-2, start
Changes since 1.1:	+0 -0 lines
Log Message:	Imported sources
#	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
94	/*
95	* Get pointer to drive info, NULL = invalid drive number
96	*/
97
98	static DriveInfo *get_drive_info(int num)
99	{
100	DriveInfo *info = first_drive_info;
101	while (info != NULL) {
102	if (info->num == num)
103	return info;
104	info = info->next;
105	}
106	return NULL;
107	}
108
109
110	/*
111	* Initialization
112	*/
113
114	void DiskInit(void)
115	{
116	first_drive_info = NULL;
117
118	// No drives specified in prefs? Then add defaults
119	if (PrefsFindString("disk", 0) == NULL)
120	SysAddDiskPrefs();
121
122	// Add drives specified in preferences
123	int32 index = 0;
124	const char *str;
125	while ((str = PrefsFindString("disk", index++)) != NULL) {
126	bool read_only = false;
127	if (str[0] == '*') {
128	read_only = true;
129	str++;
130	}
131	void *fh = Sys_open(str, read_only);
132	if (fh) {
133	D(bug(" adding drive '%s'\n", str));
134	DriveInfo *info = new DriveInfo;
135	info->fh = fh;
136	info->read_only = SysIsReadOnly(fh);
137	DriveInfo p = (DriveInfo )&first_drive_info;
138	while (p->next != NULL)
139	p = p->next;
140	p->next = info;
141	}
142	}
143	}
144
145
146	/*
147	* Deinitialization
148	*/
149
150	void DiskExit(void)
151	{
152	DriveInfo info = first_drive_info, next;
153	while (info != NULL) {
154	Sys_close(info->fh);
155	next = info->next;
156	delete info;
157	info = next;
158	}
159	}
160
161
162	/*
163	* Disk was inserted, flag for mounting
164	*/
165
166	bool DiskMountVolume(void *fh)
167	{
168	DriveInfo *info;
169	for (info = first_drive_info; info != NULL && info->fh != fh; info = info->next) ;
170	if (info) {
171	if (SysIsDiskInserted(info->fh)) {
172	info->read_only = SysIsReadOnly(info->fh);
173	WriteMacInt8(info->status + dsDiskInPlace, 1); // Inserted removable disk
174	WriteMacInt8(info->status + dsWriteProt, info->read_only ? 0xff : 0);
175	info->num_blocks = SysGetFileSize(info->fh) / 512;
176	WriteMacInt16(info->status + dsDriveSize, info->num_blocks & 0xffff);
177	WriteMacInt16(info->status + dsDriveS1, info->num_blocks >> 16);
178	info->to_be_mounted = true;
179	}
180	return true;
181	} else
182	return false;
183	}
184
185
186	/*
187	* Driver Open() routine
188	*/
189
190	int16 DiskOpen(uint32 pb, uint32 dce)
191	{
192	D(bug("DiskOpen\n"));
193
194	// Set up DCE
195	WriteMacInt32(dce + dCtlPosition, 0);
196
197	// Install drives
198	for (DriveInfo *info = first_drive_info; info; info = info->next) {
199
200	info->num = FindFreeDriveNumber(1);
201	info->to_be_mounted = false;
202
203	if (info->fh) {
204
205	// Allocate drive status record
206	M68kRegisters r;
207	r.d[0] = SIZEOF_DrvSts;
208	Execute68kTrap(0xa71e, &r); // NewPtrSysClear()
209	if (r.a[0] == 0)
210	continue;
211	info->status = r.a[0];
212	D(bug(" DrvSts at %08lx\n", info->status));
213
214	// Set up drive status
215	WriteMacInt16(info->status + dsQType, hard20);
216	WriteMacInt8(info->status + dsInstalled, 1);
217	bool disk_in_place = false;
218	if (SysIsFixedDisk(info->fh)) {
219	WriteMacInt8(info->status + dsDiskInPlace, 8); // Fixed disk
220	disk_in_place = true;
221	} else if (SysIsDiskInserted(info->fh)) {
222	WriteMacInt8(info->status + dsDiskInPlace, 1); // Inserted removable disk
223	disk_in_place = true;
224	}
225	if (disk_in_place) {
226	D(bug(" disk inserted\n"));
227	WriteMacInt8(info->status + dsWriteProt, info->read_only ? 0x80 : 0);
228	info->num_blocks = SysGetFileSize(info->fh) / 512;
229	info->to_be_mounted = true;
230	}
231	D(bug(" %ld blocks\n", info->num_blocks));
232	WriteMacInt16(info->status + dsDriveSize, info->num_blocks & 0xffff);
233	WriteMacInt16(info->status + dsDriveS1, info->num_blocks >> 16);
234
235	// Add drive to drive queue
236	D(bug(" adding drive %d\n", info->num));
237	r.d[0] = (info->num << 16) \| (DiskRefNum & 0xffff);
238	r.a[0] = info->status + dsQLink;
239	Execute68kTrap(0xa04e, &r); // AddDrive()
240	}
241	}
242	return noErr;
243	}
244
245
246	/*
247	* Driver Prime() routine
248	*/
249
250	int16 DiskPrime(uint32 pb, uint32 dce)
251	{
252	WriteMacInt32(pb + ioActCount, 0);
253
254	// Drive valid and disk inserted?
255	DriveInfo *info;
256	if ((info = get_drive_info(ReadMacInt16(pb + ioVRefNum))) == NULL)
257	return nsDrvErr;
258	if (!ReadMacInt8(info->status + dsDiskInPlace))
259	return offLinErr;
260
261	// Get parameters
262	void *buffer = Mac2HostAddr(ReadMacInt32(pb + ioBuffer));
263	size_t length = ReadMacInt32(pb + ioReqCount);
264	loff_t position = ReadMacInt32(dce + dCtlPosition);
265	if (ReadMacInt16(pb + ioPosMode) & 0x100) // 64 bit positioning
266	position = ((loff_t)ReadMacInt32(pb + ioWPosOffset) << 32) \|\| ReadMacInt32(pb + ioWPosOffset + 4);
267	if ((length & 0x1ff) \|\| (position & 0x1ff))
268	return paramErr;
269
270	size_t actual = 0;
271	if ((ReadMacInt16(pb + ioTrap) & 0xff) == aRdCmd) {
272
273	// Read
274	actual = Sys_read(info->fh, buffer, position, length);
275	if (actual != length)
276	return readErr;
277
278	} else {
279
280	// Write
281	if (info->read_only)
282	return wPrErr;
283	actual = Sys_write(info->fh, buffer, position, length);
284	if (actual != length)
285	return writErr;
286	}
287
288	// Update ParamBlock and DCE
289	WriteMacInt32(pb + ioActCount, actual);
290	WriteMacInt32(dce + dCtlPosition, ReadMacInt32(dce + dCtlPosition) + actual);
291	return noErr;
292	}
293
294
295	/*
296	* Driver Control() routine
297	*/
298
299	int16 DiskControl(uint32 pb, uint32 dce)
300	{
301	uint16 code = ReadMacInt16(pb + csCode);
302	D(bug("DiskControl %d\n", code));
303
304	// General codes
305	switch (code) {
306	case 1: // KillIO
307	return noErr;
308
309	case 65: { // Periodic action ("insert" disks on startup and check for disk changes)
310	DriveInfo *info = first_drive_info;
311	while (info != NULL) {
312
313	// Disk in drive?
314	if (!ReadMacInt8(info->status + dsDiskInPlace)) {
315
316	// No, check if disk was inserted
317	if (SysIsDiskInserted(info->fh))
318	DiskMountVolume(info->fh);
319	}
320
321	// Mount disk if flagged
322	if (info->to_be_mounted) {
323	D(bug(" mounting drive %d\n", info->num));
324	M68kRegisters r;
325	r.d[0] = info->num;
326	r.a[0] = 7; // diskEvent
327	Execute68kTrap(0xa02f, &r); // PostEvent()
328	info->to_be_mounted = false;
329	}
330
331	info = info->next;
332	}
333	return noErr;
334	}
335	}
336
337	// Drive valid?
338	DriveInfo *info;
339	if ((info = get_drive_info(ReadMacInt16(pb + ioVRefNum))) == NULL)
340	return nsDrvErr;
341
342	// Drive-specific codes
343	switch (code) {
344	case 5: // Verify disk
345	if (ReadMacInt8(info->status + dsDiskInPlace) > 0)
346	return noErr;
347	else
348	return offLinErr;
349
350	case 6: // Format disk
351	if (info->read_only)
352	return wPrErr;
353	else if (ReadMacInt8(info->status + dsDiskInPlace) > 0)
354	return noErr;
355	else
356	return offLinErr;
357
358	case 7: // Eject disk
359	if (ReadMacInt8(info->status + dsDiskInPlace) == 8) {
360	// Fixed disk, re-insert
361	M68kRegisters r;
362	r.d[0] = info->num;
363	r.a[0] = 7; // diskEvent
364	Execute68kTrap(0xa02f, &r); // PostEvent()
365	} else if (ReadMacInt8(info->status + dsDiskInPlace) > 0) {
366	SysEject(info->fh);
367	WriteMacInt8(info->status + dsDiskInPlace, 0);
368	}
369	return noErr;
370
371	case 21: // Get drive icon
372	case 22: // Get disk icon
373	WriteMacInt32(pb + csParam, DiskIconAddr);
374	return noErr;
375
376	case 23: // Get drive info
377	if (ReadMacInt8(info->status + dsDiskInPlace) == 8)
378	WriteMacInt32(pb + csParam, 0x0601); // Unspecified fixed SCSI disk
379	else
380	WriteMacInt32(pb + csParam, 0x0201); // Unspecified SCSI disk
381	return noErr;
382
383	case 24: // Get partition size
384	if (ReadMacInt8(info->status + dsDiskInPlace) > 0) {
385	WriteMacInt32(pb + csParam, info->num_blocks);
386	return noErr;
387	} else
388	return offLinErr;
389
390	default:
391	printf("WARNING: Unknown DiskControl(%d)\n", code);
392	return controlErr;
393	}
394	}
395
396
397	/*
398	* Driver Status() routine
399	*/
400
401	int16 DiskStatus(uint32 pb, uint32 dce)
402	{
403	DriveInfo *info = get_drive_info(ReadMacInt16(pb + ioVRefNum));
404	uint16 code = ReadMacInt16(pb + csCode);
405	D(bug("DiskStatus %d\n", code));
406
407	// General codes
408	switch (code) {
409	case 43: { // Driver gestalt
410	uint32 sel = ReadMacInt32(pb + csParam);
411	D(bug(" driver gestalt %c%c%c%c\n", sel >> 24, sel >> 16, sel >> 8, sel));
412	switch (sel) {
413	case 'vers': // Version
414	WriteMacInt32(pb + csParam + 4, 0x01008000);
415	break;
416	case 'devt': // Device type
417	if (info != NULL) {
418	if (ReadMacInt8(info->status + dsDiskInPlace) == 8)
419	WriteMacInt32(pb + csParam + 4, 'disk');
420	else
421	WriteMacInt32(pb + csParam + 4, 'rdsk');
422	} else
423	WriteMacInt32(pb + csParam + 4, 'disk');
424	break;
425	case 'intf': // Interface type
426	WriteMacInt32(pb + csParam + 4, 'basi');
427	break;
428	case 'sync': // Only synchronous operation?
429	WriteMacInt32(pb + csParam + 4, 0x01000000);
430	break;
431	case 'boot': // Boot ID
432	if (info != NULL)
433	WriteMacInt16(pb + csParam + 4, info->num);
434	else
435	WriteMacInt16(pb + csParam + 4, 0);
436	WriteMacInt16(pb + csParam + 6, (uint16)DiskRefNum);
437	break;
438	case 'wide': // 64-bit access supported?
439	WriteMacInt16(pb + csParam + 4, 0x0100);
440	break;
441	case 'purg': // Purge flags
442	WriteMacInt32(pb + csParam + 4, 0);
443	break;
444	case 'ejec': // Eject flags
445	WriteMacInt32(pb + csParam + 4, 0x00030003); // Don't eject on shutdown/restart
446	break;
447	case 'flus': // Flush flags
448	WriteMacInt16(pb + csParam + 4, 0);
449	break;
450	case 'vmop': // Virtual memory attributes
451	WriteMacInt32(pb + csParam + 4, 0); // Drive not available for VM
452	break;
453	default:
454	return statusErr;
455	}
456	return noErr;
457	}
458	}
459
460	// Drive valid?
461	if (info == NULL)
462	return nsDrvErr;
463
464	// Drive-specific codes
465	switch (code) {
466	case 8: // Get drive status
467	memcpy(Mac2HostAddr(pb + csParam), Mac2HostAddr(info->status), 22);
468	return noErr;
469
470	default:
471	printf("WARNING: Unknown DiskStatus(%d)\n", code);
472	return statusErr;
473	}
474	}