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root/cebix/BasiliskII/src/emul_op.cpp
Revision: 1.12
Committed: 1999-11-03T10:56:12Z (25 years, 1 month ago) by cebix
Branch: MAIN
CVS Tags: snapshot-22121999, release-0_8-1
Changes since 1.11: +1 -1 lines
Log Message:
- imported UAE CPU 0.8.10 changes
- new utility functions Mac_memset, Mac2Host_memcpy, Host2Mac_memcpu and
  Mac2Mac_memcpy
- extfs.cpp: fixed bug in fs_rename() and fs_cat_move() (auxiliary IOParam
  block was not in Mac address space)
- some provisions for using UAE CPU compiler (doesn't work yet)

File Contents

# User Rev Content
1 cebix 1.1 /*
2     * emul_op.cpp - 68k opcodes for ROM patches
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     #include <string.h>
22     #include <stdio.h>
23    
24     #include "sysdeps.h"
25     #include "cpu_emulation.h"
26     #include "main.h"
27     #include "macos_util.h"
28     #include "rom_patches.h"
29     #include "rsrc_patches.h"
30     #include "xpram.h"
31     #include "adb.h"
32     #include "timer.h"
33     #include "clip.h"
34     #include "serial.h"
35     #include "sony.h"
36     #include "disk.h"
37     #include "cdrom.h"
38     #include "scsi.h"
39     #include "video.h"
40     #include "audio.h"
41     #include "ether.h"
42 cebix 1.4 #include "extfs.h"
43 cebix 1.1 #include "emul_op.h"
44    
45 cebix 1.8 #if ENABLE_MON
46     #include "mon.h"
47     #endif
48    
49 cebix 1.1 #define DEBUG 0
50     #include "debug.h"
51    
52    
53     /*
54     * Execute EMUL_OP opcode (called by 68k emulator or Illegal Instruction trap handler)
55     */
56    
57     void EmulOp(uint16 opcode, M68kRegisters *r)
58     {
59     D(bug("EmulOp %04x\n", opcode));
60     switch (opcode) {
61     case M68K_EMUL_BREAK: { // Breakpoint
62     printf("*** Breakpoint\n");
63     printf("d0 %08lx d1 %08lx d2 %08lx d3 %08lx\n"
64     "d4 %08lx d5 %08lx d6 %08lx d7 %08lx\n"
65     "a0 %08lx a1 %08lx a2 %08lx a3 %08lx\n"
66     "a4 %08lx a5 %08lx a6 %08lx a7 %08lx\n"
67     "sr %04x\n",
68     r->d[0], r->d[1], r->d[2], r->d[3], r->d[4], r->d[5], r->d[6], r->d[7],
69     r->a[0], r->a[1], r->a[2], r->a[3], r->a[4], r->a[5], r->a[6], r->a[7],
70     r->sr);
71 cebix 1.8 #if ENABLE_MON
72 cebix 1.9 char *arg[2] = {"rmon", NULL};
73 cebix 1.8 mon(1, arg);
74     #endif
75 cebix 1.1 QuitEmulator();
76     break;
77     }
78    
79     case M68K_EMUL_OP_SHUTDOWN: // Quit emulator
80     QuitEmulator();
81     break;
82    
83     case M68K_EMUL_OP_RESET: { // MacOS reset
84     D(bug("*** RESET ***\n"));
85     TimerReset();
86     EtherReset();
87    
88     // Create BootGlobs at top of memory
89 cebix 1.12 Mac_memset(RAMBaseMac + RAMSize - 4096, 0, 4096);
90 cebix 1.1 uint32 boot_globs = RAMBaseMac + RAMSize - 0x1c;
91     WriteMacInt32(boot_globs + 0x00, RAMBaseMac); // First RAM bank
92     WriteMacInt32(boot_globs + 0x04, RAMSize);
93     WriteMacInt32(boot_globs + 0x08, 0xffffffff); // End of bank table
94     WriteMacInt32(boot_globs + 0x0c, 0);
95    
96     // Setup registers for boot routine
97     r->d[0] = ReadMacInt32(ROMBaseMac + UniversalInfo + 0x18); // AddrMapFlags
98     r->d[1] = ReadMacInt32(ROMBaseMac + UniversalInfo + 0x1c); // UnivROMFlags
99     r->d[2] = ReadMacInt32(ROMBaseMac + UniversalInfo + 0x10); // HWCfgFlags/IDs
100     if (FPUType)
101     r->d[2] |= 0x10000000; // Set FPU flag if FPU present
102     else
103     r->d[2] &= 0xefffffff; // Clear FPU flag if no FPU present
104     r->a[0] = ROMBaseMac + UniversalInfo + ReadMacInt32(ROMBaseMac + UniversalInfo);// AddrMap
105     r->a[1] = ROMBaseMac + UniversalInfo; // UniversalInfo
106     r->a[6] = boot_globs; // BootGlobs
107     r->a[7] = RAMBaseMac + 0x10000; // Boot stack
108     break;
109     }
110    
111     case M68K_EMUL_OP_CLKNOMEM: { // Clock/PRAM operations
112     bool is_read = r->d[1] & 0x80;
113     if ((r->d[1] & 0x78) == 0x38) {
114     // XPRAM
115     uint8 reg = (r->d[1] << 5) & 0xe0 | (r->d[1] >> 10) & 0x1f;
116     if (is_read) {
117     r->d[2] = XPRAM[reg];
118     bool localtalk = !(XPRAM[0xe0] || XPRAM[0xe1]); // LocalTalk enabled?
119     switch (reg) {
120     case 0x08:
121     if (ROMVersion != ROM_VERSION_32)
122     r->d[2] &= 0xf8;
123     break;
124     case 0x8a:
125     r->d[2] |= 0x05; // 32bit mode is always enabled
126     break;
127     case 0xe0: // Disable LocalTalk (use EtherTalk instead)
128     if (localtalk)
129     r->d[2] = 0x00;
130     break;
131     case 0xe1:
132     if (localtalk)
133     r->d[2] = 0xf1;
134     break;
135     case 0xe2:
136     if (localtalk)
137     r->d[2] = 0x00;
138     break;
139     case 0xe3:
140     if (localtalk)
141     r->d[2] = 0x0a;
142     break;
143     }
144     D(bug("Read XPRAM %02x->%02lx\n", reg, r->d[2]));
145     } else {
146     D(bug("Write XPRAM %02x<-%02lx\n", reg, r->d[2] & 0xff));
147     if (reg == 0x8a && !TwentyFourBitAddressing)
148     r->d[2] |= 0x05; // 32bit mode is always enabled if possible
149     XPRAM[reg] = r->d[2];
150     }
151     } else {
152     // PRAM, RTC and other clock registers
153     uint8 reg = (r->d[1] >> 2) & 0x1f;
154     if (reg >= 0x10 || (reg >= 0x08 && reg < 0x0c)) {
155     if (is_read) {
156     r->d[2] = XPRAM[reg];
157     D(bug("Read XPRAM %02x->%02x\n", reg, XPRAM[reg]));
158     } else {
159     D(bug("Write PRAM %02x<-%02lx\n", reg, r->d[2]));
160     XPRAM[reg] = r->d[2];
161     }
162     } else if (reg < 0x08 && is_read) {
163     uint32 t = TimerDateTime();
164 cebix 1.2 uint8 b = t;
165 cebix 1.1 switch (reg & 3) {
166     case 1: b = t >> 8; break;
167     case 2: b = t >> 16; break;
168     case 3: b = t >> 24; break;
169     }
170     r->d[2] = b;
171     } else
172     D(bug("RTC %s op %d, d1 %08lx d2 %08lx\n", is_read ? "read" : "write", reg, r->d[1], r->d[2]));
173     }
174     r->d[0] = 0;
175     r->d[1] = r->d[2];
176     break;
177     }
178    
179     case M68K_EMUL_OP_READ_XPRAM: // Read from XPRAM (ROM10/11)
180     D(bug("Read XPRAM %02lx\n", r->d[1]));
181     r->d[1] = XPRAM[r->d[1] & 0xff];
182     break;
183    
184     case M68K_EMUL_OP_READ_XPRAM2: // Read from XPRAM (ROM15)
185     D(bug("Read XPRAM %02lx\n", r->d[0]));
186     r->d[0] = XPRAM[r->d[0] & 0xff];
187     break;
188    
189     case M68K_EMUL_OP_PATCH_BOOT_GLOBS: // Patch BootGlobs at startup
190     D(bug("Patch BootGlobs\n"));
191     WriteMacInt32(r->a[4] - 20, RAMBaseMac + RAMSize); // MemTop
192     WriteMacInt8(r->a[4] - 26, 0); // No MMU
193     WriteMacInt8(r->a[4] - 25, ReadMacInt8(r->a[4] - 25) | 1); // No MMU
194     r->a[6] = RAMBaseMac + RAMSize;
195     break;
196    
197     case M68K_EMUL_OP_FIX_BOOTSTACK: // Set boot stack to 3/4 of RAM (7.5)
198     D(bug("Fix boot stack\n"));
199     r->a[1] = RAMBaseMac + RAMSize * 3 / 4;
200     break;
201    
202     case M68K_EMUL_OP_FIX_MEMSIZE: { // Set correct logical and physical memory size
203     D(bug("Fix MemSize\n"));
204     uint32 diff = ReadMacInt32(0x1ef8) - ReadMacInt32(0x1ef4); // Difference between logical and physical size
205     WriteMacInt32(0x1ef8, RAMSize); // Physical RAM size
206     WriteMacInt32(0x1ef4, RAMSize - diff); // Logical RAM size
207     break;
208     }
209    
210     case M68K_EMUL_OP_ADBOP: // ADBOp() replacement
211     ADBOp(r->d[0], Mac2HostAddr(ReadMacInt32(r->a[0])));
212     break;
213    
214     case M68K_EMUL_OP_INSTIME: // InsTime() replacement
215     r->d[0] = InsTime(r->a[0], r->d[1]);
216     break;
217    
218     case M68K_EMUL_OP_RMVTIME: // RmvTime() replacement
219     r->d[0] = RmvTime(r->a[0]);
220     break;
221    
222     case M68K_EMUL_OP_PRIMETIME: // PrimeTime() replacement
223     r->d[0] = PrimeTime(r->a[0], r->d[0]);
224     break;
225    
226     case M68K_EMUL_OP_MICROSECONDS: // Microseconds() replacement
227     Microseconds(r->a[0], r->d[0]);
228     break;
229    
230     case M68K_EMUL_OP_INSTALL_DRIVERS: {// Patch to install our own drivers during startup
231     // Install drivers
232     D(bug("InstallDrivers\n"));
233     InstallDrivers(r->a[0]);
234    
235     // Install PutScrap() patch
236     M68kRegisters r;
237     r.d[0] = 0xa9fe;
238     r.a[0] = PutScrapPatch;
239     Execute68kTrap(0xa647, &r); // SetToolTrap()
240    
241     // Setup fake ASC registers
242     if (ROMVersion == ROM_VERSION_32) {
243     r.d[0] = 0x1000;
244     Execute68kTrap(0xa71e, &r); // NewPtrSysClear()
245     uint32 asc_regs = r.a[0];
246     D(bug("ASC registers at %08lx\n", asc_regs));
247     WriteMacInt8(asc_regs + 0x800, 0x0f); // Set ASC version number
248     WriteMacInt32(0xcc0, asc_regs); // Set ASCBase
249     }
250     break;
251     }
252    
253     case M68K_EMUL_OP_SERD: // Install serial drivers
254     D(bug("InstallSERD\n"));
255     InstallSERD();
256     break;
257    
258     case M68K_EMUL_OP_SONY_OPEN: // Floppy driver functions
259     r->d[0] = SonyOpen(r->a[0], r->a[1]);
260     break;
261    
262     case M68K_EMUL_OP_SONY_PRIME:
263     r->d[0] = SonyPrime(r->a[0], r->a[1]);
264     break;
265    
266     case M68K_EMUL_OP_SONY_CONTROL:
267     r->d[0] = SonyControl(r->a[0], r->a[1]);
268     break;
269    
270     case M68K_EMUL_OP_SONY_STATUS:
271     r->d[0] = SonyStatus(r->a[0], r->a[1]);
272     break;
273    
274     case M68K_EMUL_OP_DISK_OPEN: // Disk driver functions
275     r->d[0] = DiskOpen(r->a[0], r->a[1]);
276     break;
277    
278     case M68K_EMUL_OP_DISK_PRIME:
279     r->d[0] = DiskPrime(r->a[0], r->a[1]);
280     break;
281    
282     case M68K_EMUL_OP_DISK_CONTROL:
283     r->d[0] = DiskControl(r->a[0], r->a[1]);
284     break;
285    
286     case M68K_EMUL_OP_DISK_STATUS:
287     r->d[0] = DiskStatus(r->a[0], r->a[1]);
288     break;
289    
290     case M68K_EMUL_OP_CDROM_OPEN: // CD-ROM driver functions
291     r->d[0] = CDROMOpen(r->a[0], r->a[1]);
292     break;
293    
294     case M68K_EMUL_OP_CDROM_PRIME:
295     r->d[0] = CDROMPrime(r->a[0], r->a[1]);
296     break;
297    
298     case M68K_EMUL_OP_CDROM_CONTROL:
299     r->d[0] = CDROMControl(r->a[0], r->a[1]);
300     break;
301    
302     case M68K_EMUL_OP_CDROM_STATUS:
303     r->d[0] = CDROMStatus(r->a[0], r->a[1]);
304     break;
305    
306     case M68K_EMUL_OP_VIDEO_OPEN: // Video driver functions
307 cebix 1.5 r->d[0] = VideoDriverOpen(r->a[0], r->a[1]);
308 cebix 1.1 break;
309    
310     case M68K_EMUL_OP_VIDEO_CONTROL:
311 cebix 1.5 r->d[0] = VideoDriverControl(r->a[0], r->a[1]);
312 cebix 1.1 break;
313    
314     case M68K_EMUL_OP_VIDEO_STATUS:
315 cebix 1.5 r->d[0] = VideoDriverStatus(r->a[0], r->a[1]);
316 cebix 1.1 break;
317    
318     case M68K_EMUL_OP_SERIAL_OPEN: // Serial driver functions
319     r->d[0] = SerialOpen(r->a[0], r->a[1], r->d[0]);
320     break;
321    
322     case M68K_EMUL_OP_SERIAL_PRIME:
323     r->d[0] = SerialPrime(r->a[0], r->a[1], r->d[0]);
324     break;
325    
326     case M68K_EMUL_OP_SERIAL_CONTROL:
327     r->d[0] = SerialControl(r->a[0], r->a[1], r->d[0]);
328     break;
329    
330     case M68K_EMUL_OP_SERIAL_STATUS:
331     r->d[0] = SerialStatus(r->a[0], r->a[1], r->d[0]);
332     break;
333    
334     case M68K_EMUL_OP_SERIAL_CLOSE:
335     r->d[0] = SerialClose(r->a[0], r->a[1], r->d[0]);
336     break;
337    
338     case M68K_EMUL_OP_ETHER_OPEN: // Ethernet driver functions
339     r->d[0] = EtherOpen(r->a[0], r->a[1]);
340     break;
341    
342     case M68K_EMUL_OP_ETHER_CONTROL:
343     r->d[0] = EtherControl(r->a[0], r->a[1]);
344     break;
345    
346     case M68K_EMUL_OP_ETHER_READ_PACKET:
347     EtherReadPacket((uint8 **)&r->a[0], r->a[3], r->d[3], r->d[1]);
348     break;
349    
350     case M68K_EMUL_OP_SCSI_DISPATCH: { // SCSIDispatch() replacement
351     uint32 ret = ReadMacInt32(r->a[7]); // Get return address
352     uint16 sel = ReadMacInt16(r->a[7] + 4); // Get selector
353     r->a[7] += 6;
354     int stack = 0;
355     switch (sel) {
356     case 0: // SCSIReset
357     WriteMacInt16(r->a[7], SCSIReset());
358     stack = 0;
359     break;
360     case 1: // SCSIGet
361     WriteMacInt16(r->a[7], SCSIGet());
362     stack = 0;
363     break;
364     case 2: // SCSISelect
365     case 11: // SCSISelAtn
366     WriteMacInt16(r->a[7] + 2, SCSISelect(ReadMacInt16(r->a[7]) & 0xff));
367     stack = 2;
368     break;
369     case 3: // SCSICmd
370     WriteMacInt16(r->a[7] + 6, SCSICmd(ReadMacInt16(r->a[7]), Mac2HostAddr(ReadMacInt32(r->a[7] + 2))));
371     stack = 6;
372     break;
373     case 4: // SCSIComplete
374     WriteMacInt16(r->a[7] + 12, SCSIComplete(ReadMacInt32(r->a[7]), ReadMacInt32(r->a[7] + 4), ReadMacInt32(r->a[7] + 8)));
375     stack = 12;
376     break;
377     case 5: // SCSIRead
378     case 8: // SCSIRBlind
379     WriteMacInt16(r->a[7] + 4, SCSIRead(ReadMacInt32(r->a[7])));
380     stack = 4;
381     break;
382     case 6: // SCSIWrite
383     case 9: // SCSIWBlind
384     WriteMacInt16(r->a[7] + 4, SCSIWrite(ReadMacInt32(r->a[7])));
385     stack = 4;
386     break;
387     case 10: // SCSIStat
388     WriteMacInt16(r->a[7], SCSIStat());
389     stack = 0;
390     break;
391     case 12: // SCSIMsgIn
392     WriteMacInt16(r->a[7] + 4, 0);
393     stack = 4;
394     break;
395     case 13: // SCSIMsgOut
396     WriteMacInt16(r->a[7] + 2, 0);
397     stack = 2;
398     break;
399     case 14: // SCSIMgrBusy
400     WriteMacInt16(r->a[7], SCSIMgrBusy());
401     stack = 0;
402     break;
403     default:
404     printf("FATAL: SCSIDispatch(%d): illegal selector\n", sel);
405     QuitEmulator();
406     break;
407     }
408     r->a[0] = ret; // "rtd" emulation, a0 = return address, a1 = new stack pointer
409     r->a[1] = r->a[7] + stack;
410     break;
411     }
412    
413     case M68K_EMUL_OP_IRQ: // Level 1 interrupt
414     r->d[0] = 0;
415     if (InterruptFlags & INTFLAG_60HZ) {
416     ClearInterruptFlag(INTFLAG_60HZ);
417     if (HasMacStarted()) {
418    
419 cebix 1.3 // Mac has started, execute all 60Hz interrupt functions
420 cebix 1.1 ADBInterrupt();
421     TimerInterrupt();
422     VideoInterrupt();
423 cebix 1.3 SonyInterrupt();
424     DiskInterrupt();
425     CDROMInterrupt();
426 cebix 1.1
427     // Call DoVBLTask(0)
428     if (ROMVersion == ROM_VERSION_32) {
429     M68kRegisters r2;
430     r2.d[0] = 0;
431     Execute68kTrap(0xa072, &r2);
432     }
433    
434     r->d[0] = 1; // Flag: 68k interrupt routine executes VBLTasks etc.
435     }
436     }
437     if (InterruptFlags & INTFLAG_SERIAL) {
438     ClearInterruptFlag(INTFLAG_SERIAL);
439     SerialInterrupt();
440     }
441     if (InterruptFlags & INTFLAG_ETHER) {
442     ClearInterruptFlag(INTFLAG_ETHER);
443     EtherInterrupt();
444     }
445     if (InterruptFlags & INTFLAG_AUDIO) {
446     ClearInterruptFlag(INTFLAG_AUDIO);
447     AudioInterrupt();
448     }
449     break;
450    
451     case M68K_EMUL_OP_PUT_SCRAP: { // PutScrap() patch
452     void *scrap = Mac2HostAddr(ReadMacInt32(r->a[7] + 4));
453     uint32 type = ReadMacInt32(r->a[7] + 8);
454     int32 length = ReadMacInt32(r->a[7] + 12);
455     PutScrap(type, scrap, length);
456     break;
457     }
458    
459     case M68K_EMUL_OP_CHECKLOAD: { // vCheckLoad() patch (resource loader)
460     uint32 type = r->d[1];
461     int16 id = ReadMacInt16(r->a[2]);
462     if (r->a[0] == 0)
463     break;
464     uint32 adr = ReadMacInt32(r->a[0]);
465     if (adr == 0)
466     break;
467     uint8 *p = Mac2HostAddr(adr);
468     uint32 size = ReadMacInt32(adr - 8) & 0xffffff;
469     CheckLoad(type, id, p, size);
470     break;
471     }
472    
473     case M68K_EMUL_OP_AUDIO: // Audio component dispatch function
474     r->d[0] = AudioDispatch(r->a[3], r->a[4]);
475 cebix 1.4 break;
476    
477 cebix 1.6 #if SUPPORTS_EXTFS
478 cebix 1.4 case M68K_EMUL_OP_EXTFS_COMM: // External file system routines
479     WriteMacInt16(r->a[7] + 14, ExtFSComm(ReadMacInt16(r->a[7] + 12), ReadMacInt32(r->a[7] + 8), ReadMacInt32(r->a[7] + 4)));
480     break;
481    
482     case M68K_EMUL_OP_EXTFS_HFS:
483     WriteMacInt16(r->a[7] + 20, ExtFSHFS(ReadMacInt32(r->a[7] + 16), ReadMacInt16(r->a[7] + 14), ReadMacInt32(r->a[7] + 10), ReadMacInt32(r->a[7] + 6), ReadMacInt16(r->a[7] + 4)));
484 cebix 1.1 break;
485 cebix 1.6 #endif
486 cebix 1.1
487 cebix 1.7 case M68K_EMUL_OP_BLOCK_MOVE: // BlockMove() replacement
488     memmove(Mac2HostAddr(r->a[1]), Mac2HostAddr(r->a[0]), r->d[0]);
489     break;
490    
491 cebix 1.1 default:
492     printf("FATAL: EMUL_OP called with bogus opcode %08x\n", opcode);
493     printf("d0 %08lx d1 %08lx d2 %08lx d3 %08lx\n"
494     "d4 %08lx d5 %08lx d6 %08lx d7 %08lx\n"
495     "a0 %08lx a1 %08lx a2 %08lx a3 %08lx\n"
496     "a4 %08lx a5 %08lx a6 %08lx a7 %08lx\n"
497     "sr %04x\n",
498     r->d[0], r->d[1], r->d[2], r->d[3], r->d[4], r->d[5], r->d[6], r->d[7],
499     r->a[0], r->a[1], r->a[2], r->a[3], r->a[4], r->a[5], r->a[6], r->a[7],
500     r->sr);
501 cebix 1.9 #if ENABLE_MON
502     char *arg[2] = {"rmon", NULL};
503     mon(1, arg);
504     #endif
505 cebix 1.1 QuitEmulator();
506     break;
507     }
508     }