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/* |
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* disk.cpp - Generic disk driver |
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* |
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* Basilisk II (C) 1997-2001 Christian Bauer |
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* Basilisk II (C) 1997-2002 Christian Bauer |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* Technote FL 24: "Don't Look at ioPosOffset for Devices" |
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*/ |
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#include "sysdeps.h" |
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#include <string.h> |
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#include <vector> |
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#ifndef NO_STD_NAMESPACE |
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using std::vector; |
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#endif |
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#include "sysdeps.h" |
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#include "cpu_emulation.h" |
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#include "main.h" |
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#include "macos_util.h" |
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// Struct for each drive |
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struct DriveInfo { |
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DriveInfo() |
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{ |
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next = NULL; |
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num = 0; |
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fh = NULL; |
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read_only = false; |
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status = 0; |
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} |
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struct disk_drive_info { |
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disk_drive_info() : num(0), fh(NULL), start_byte(0), read_only(false), status(0) {} |
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disk_drive_info(void *fh_, bool ro) : num(0), fh(fh_), read_only(ro), status(0) {} |
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|
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void close_fh(void) { Sys_close(fh); } |
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DriveInfo *next; // Pointer to next DriveInfo (must be first in struct!) |
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int num; // Drive number |
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void *fh; // File handle |
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loff_t start_byte; // Start of HFS partition on disk |
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uint32 num_blocks; // Size in 512-byte blocks |
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bool to_be_mounted; // Flag: drive must be mounted in accRun |
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bool read_only; // Flag: force write protection |
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uint32 status; // Mac address of drive status record |
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}; |
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// Linked list of DriveInfos |
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static DriveInfo *first_drive_info; |
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// List of drives handled by this driver |
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typedef vector<disk_drive_info> drive_vec; |
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static drive_vec drives; |
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// Icon address (Mac address space, set by PatchROM()) |
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uint32 DiskIconAddr; |
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/* |
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* Get pointer to drive info, NULL = invalid drive number |
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* Get pointer to drive info or drives.end() if not found |
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*/ |
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static DriveInfo *get_drive_info(int num) |
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static drive_vec::iterator get_drive_info(int num) |
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{ |
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DriveInfo *info = first_drive_info; |
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while (info != NULL) { |
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drive_vec::iterator info, end = drives.end(); |
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for (info = drives.begin(); info != end; ++info) { |
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if (info->num == num) |
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return info; |
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info = info->next; |
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} |
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return NULL; |
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return info; |
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} |
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/* |
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* Find HFS partition, set info->start_byte and info->num_blocks |
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* (0 = no partition map or HFS partition found, assume flat disk image) |
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*/ |
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|
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static void find_hfs_partition(disk_drive_info &info) |
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{ |
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info.start_byte = 0; |
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info.num_blocks = 0; |
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uint8 *map = new uint8[512]; |
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// Search first 64 blocks for HFS partition |
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for (int i=0; i<64; i++) { |
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if (Sys_read(info.fh, map, i * 512, 512) != 512) |
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break; |
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// Not a partition map block? Then look at next block |
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uint16 sig = (map[0] << 8) | map[1]; |
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if (sig != 0x504d) |
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continue; |
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// Partition map block found, Apple HFS partition? |
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if (strcmp((char *)(map + 48), "Apple_HFS") == 0) { |
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info.start_byte = (loff_t)((map[8] << 24) | (map[9] << 16) | (map[10] << 8) | map[11]) << 9; |
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info.num_blocks = (map[12] << 24) | (map[13] << 16) | (map[14] << 8) | map[15]; |
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D(bug(" HFS partition found at %d, %d blocks\n", info.start_byte, info.num_blocks)); |
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break; |
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} |
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} |
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delete[] map; |
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} |
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void DiskInit(void) |
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{ |
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first_drive_info = NULL; |
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// No drives specified in prefs? Then add defaults |
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if (PrefsFindString("disk", 0) == NULL) |
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SysAddDiskPrefs(); |
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// Add drives specified in preferences |
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int32 index = 0; |
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int index = 0; |
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const char *str; |
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while ((str = PrefsFindString("disk", index++)) != NULL) { |
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bool read_only = false; |
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str++; |
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} |
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void *fh = Sys_open(str, read_only); |
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if (fh) { |
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D(bug(" adding drive '%s'\n", str)); |
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DriveInfo *info = new DriveInfo; |
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info->fh = fh; |
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info->read_only = SysIsReadOnly(fh); |
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DriveInfo *p = (DriveInfo *)&first_drive_info; |
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while (p->next != NULL) |
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p = p->next; |
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p->next = info; |
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} |
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if (fh) |
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drives.push_back(disk_drive_info(fh, SysIsReadOnly(fh))); |
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} |
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} |
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void DiskExit(void) |
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{ |
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DriveInfo *info = first_drive_info, *next; |
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while (info != NULL) { |
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Sys_close(info->fh); |
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next = info->next; |
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delete info; |
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info = next; |
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} |
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drive_vec::iterator info, end = drives.end(); |
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for (info = drives.begin(); info != end; ++info) |
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info->close_fh(); |
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drives.clear(); |
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} |
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bool DiskMountVolume(void *fh) |
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{ |
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DriveInfo *info; |
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for (info = first_drive_info; info != NULL && info->fh != fh; info = info->next) ; |
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if (info) { |
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drive_vec::iterator info = drives.begin(), end = drives.end(); |
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while (info != end && info->fh != fh) |
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++info; |
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if (info != end) { |
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if (SysIsDiskInserted(info->fh)) { |
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info->read_only = SysIsReadOnly(info->fh); |
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WriteMacInt8(info->status + dsDiskInPlace, 1); // Inserted removable disk |
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WriteMacInt8(info->status + dsWriteProt, info->read_only ? 0xff : 0); |
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info->num_blocks = SysGetFileSize(info->fh) / 512; |
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find_hfs_partition(*info); |
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if (info->start_byte == 0) |
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info->num_blocks = SysGetFileSize(info->fh) / 512; |
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WriteMacInt16(info->status + dsDriveSize, info->num_blocks & 0xffff); |
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WriteMacInt16(info->status + dsDriveS1, info->num_blocks >> 16); |
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info->to_be_mounted = true; |
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static void mount_mountable_volumes(void) |
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{ |
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DriveInfo *info = first_drive_info; |
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while (info != NULL) { |
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drive_vec::iterator info, end = drives.end(); |
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for (info = drives.begin(); info != end; ++info) { |
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// Disk in drive? |
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if (!ReadMacInt8(info->status + dsDiskInPlace)) { |
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Execute68kTrap(0xa02f, &r); // PostEvent() |
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info->to_be_mounted = false; |
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} |
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info = info->next; |
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} |
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} |
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acc_run_called = false; |
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// Install drives |
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for (DriveInfo *info = first_drive_info; info; info = info->next) { |
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drive_vec::iterator info, end = drives.end(); |
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for (info = drives.begin(); info != end; ++info) { |
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info->num = FindFreeDriveNumber(1); |
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info->to_be_mounted = false; |
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if (disk_in_place) { |
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D(bug(" disk inserted\n")); |
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WriteMacInt8(info->status + dsWriteProt, info->read_only ? 0x80 : 0); |
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info->num_blocks = SysGetFileSize(info->fh) / 512; |
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find_hfs_partition(*info); |
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if (info->start_byte == 0) |
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info->num_blocks = SysGetFileSize(info->fh) / 512; |
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info->to_be_mounted = true; |
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} |
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D(bug(" %d blocks\n", info->num_blocks)); |
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WriteMacInt32(pb + ioActCount, 0); |
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// Drive valid and disk inserted? |
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DriveInfo *info; |
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if ((info = get_drive_info(ReadMacInt16(pb + ioVRefNum))) == NULL) |
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drive_vec::iterator info = get_drive_info(ReadMacInt16(pb + ioVRefNum)); |
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if (info == drives.end()) |
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return nsDrvErr; |
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if (!ReadMacInt8(info->status + dsDiskInPlace)) |
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return offLinErr; |
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if ((ReadMacInt16(pb + ioTrap) & 0xff) == aRdCmd) { |
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// Read |
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actual = Sys_read(info->fh, buffer, position, length); |
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actual = Sys_read(info->fh, buffer, position + info->start_byte, length); |
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if (actual != length) |
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return readErr; |
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// Write |
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if (info->read_only) |
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return wPrErr; |
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actual = Sys_write(info->fh, buffer, position, length); |
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actual = Sys_write(info->fh, buffer, position + info->start_byte, length); |
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if (actual != length) |
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return writErr; |
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} |
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} |
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// Drive valid? |
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DriveInfo *info; |
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if ((info = get_drive_info(ReadMacInt16(pb + ioVRefNum))) == NULL) |
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drive_vec::iterator info = get_drive_info(ReadMacInt16(pb + ioVRefNum)); |
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if (info == drives.end()) |
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return nsDrvErr; |
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// Drive-specific codes |
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int16 DiskStatus(uint32 pb, uint32 dce) |
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{ |
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DriveInfo *info = get_drive_info(ReadMacInt16(pb + ioVRefNum)); |
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drive_vec::iterator info = get_drive_info(ReadMacInt16(pb + ioVRefNum)); |
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uint16 code = ReadMacInt16(pb + csCode); |
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D(bug("DiskStatus %d\n", code)); |
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// General codes |
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// General codes (we can get these even if the drive was invalid) |
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switch (code) { |
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case 43: { // Driver gestalt |
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uint32 sel = ReadMacInt32(pb + csParam); |
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WriteMacInt32(pb + csParam + 4, 0x01008000); |
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break; |
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case FOURCC('d','e','v','t'): // Device type |
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if (info != NULL) { |
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if (info != drives.end()) { |
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if (ReadMacInt8(info->status + dsDiskInPlace) == 8) |
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WriteMacInt32(pb + csParam + 4, FOURCC('d','i','s','k')); |
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else |
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WriteMacInt32(pb + csParam + 4, 0x01000000); |
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break; |
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case FOURCC('b','o','o','t'): // Boot ID |
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if (info != NULL) |
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if (info != drives.end()) |
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WriteMacInt16(pb + csParam + 4, info->num); |
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else |
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WriteMacInt16(pb + csParam + 4, 0); |
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} |
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// Drive valid? |
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if (info == NULL) |
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if (info == drives.end()) |
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return nsDrvErr; |
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// Drive-specific codes |
