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- /*
- * disk.cpp - Generic disk driver
- *
- * Basilisk II (C) 1997-2001 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();
- }
-