macemu/BasiliskII/src/emul_op.cpp
cebix fe9643c0e9 - fixed the problem with Ticks getting incremented on every interrupt, not
just 60Hz (e.g. moving the mouse made the caret blink faster)
- removed the TAB characters from the ChangeLog file
2002-01-18 21:06:03 +00:00

561 lines
16 KiB
C++

/*
* emul_op.cpp - 68k opcodes for ROM patches
*
* Basilisk II (C) 1997-2002 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
*/
#include <string.h>
#include <stdio.h>
#include "sysdeps.h"
#include "cpu_emulation.h"
#include "main.h"
#include "macos_util.h"
#include "rom_patches.h"
#include "rsrc_patches.h"
#include "xpram.h"
#include "adb.h"
#include "timer.h"
#include "clip.h"
#include "serial.h"
#include "sony.h"
#include "disk.h"
#include "cdrom.h"
#include "scsi.h"
#include "video.h"
#include "audio.h"
#include "ether.h"
#include "extfs.h"
#include "emul_op.h"
#ifdef ENABLE_MON
#include "mon.h"
#endif
#define DEBUG 0
#include "debug.h"
/*
* Execute EMUL_OP opcode (called by 68k emulator or Illegal Instruction trap handler)
*/
void EmulOp(uint16 opcode, M68kRegisters *r)
{
D(bug("EmulOp %04x\n", opcode));
switch (opcode) {
case M68K_EMUL_BREAK: { // Breakpoint
printf("*** Breakpoint\n");
printf("d0 %08x d1 %08x d2 %08x d3 %08x\n"
"d4 %08x d5 %08x d6 %08x d7 %08x\n"
"a0 %08x a1 %08x a2 %08x a3 %08x\n"
"a4 %08x a5 %08x a6 %08x a7 %08x\n"
"sr %04x\n",
r->d[0], r->d[1], r->d[2], r->d[3], r->d[4], r->d[5], r->d[6], r->d[7],
r->a[0], r->a[1], r->a[2], r->a[3], r->a[4], r->a[5], r->a[6], r->a[7],
r->sr);
VideoQuitFullScreen();
#ifdef ENABLE_MON
char *arg[4] = {"mon", "-m", "-r", NULL};
mon(3, arg);
#endif
QuitEmulator();
break;
}
case M68K_EMUL_OP_SHUTDOWN: // Quit emulator
QuitEmulator();
break;
case M68K_EMUL_OP_RESET: { // MacOS reset
D(bug("*** RESET ***\n"));
TimerReset();
EtherReset();
AudioReset();
// Create BootGlobs at top of memory
Mac_memset(RAMBaseMac + RAMSize - 4096, 0, 4096);
uint32 boot_globs = RAMBaseMac + RAMSize - 0x1c;
WriteMacInt32(boot_globs + 0x00, RAMBaseMac); // First RAM bank
WriteMacInt32(boot_globs + 0x04, RAMSize);
WriteMacInt32(boot_globs + 0x08, 0xffffffff); // End of bank table
WriteMacInt32(boot_globs + 0x0c, 0);
// Setup registers for boot routine
r->d[0] = ReadMacInt32(ROMBaseMac + UniversalInfo + 0x18); // AddrMapFlags
r->d[1] = ReadMacInt32(ROMBaseMac + UniversalInfo + 0x1c); // UnivROMFlags
r->d[2] = ReadMacInt32(ROMBaseMac + UniversalInfo + 0x10); // HWCfgFlags/IDs
if (FPUType)
r->d[2] |= 0x10000000; // Set FPU flag if FPU present
else
r->d[2] &= 0xefffffff; // Clear FPU flag if no FPU present
r->a[0] = ROMBaseMac + UniversalInfo + ReadMacInt32(ROMBaseMac + UniversalInfo);// AddrMap
r->a[1] = ROMBaseMac + UniversalInfo; // UniversalInfo
r->a[6] = boot_globs; // BootGlobs
r->a[7] = RAMBaseMac + 0x10000; // Boot stack
break;
}
case M68K_EMUL_OP_CLKNOMEM: { // Clock/PRAM operations
bool is_read = r->d[1] & 0x80;
if ((r->d[1] & 0x78) == 0x38) {
// XPRAM
uint8 reg = (r->d[1] << 5) & 0xe0 | (r->d[1] >> 10) & 0x1f;
if (is_read) {
r->d[2] = XPRAM[reg];
bool localtalk = !(XPRAM[0xe0] || XPRAM[0xe1]); // LocalTalk enabled?
switch (reg) {
case 0x08:
if (ROMVersion != ROM_VERSION_32)
r->d[2] &= 0xf8;
break;
case 0x8a:
r->d[2] |= 0x05; // 32bit mode is always enabled
break;
case 0xe0: // Disable LocalTalk (use EtherTalk instead)
if (localtalk)
r->d[2] = 0x00;
break;
case 0xe1:
if (localtalk)
r->d[2] = 0xf1;
break;
case 0xe2:
if (localtalk)
r->d[2] = 0x00;
break;
case 0xe3:
if (localtalk)
r->d[2] = 0x0a;
break;
}
D(bug("Read XPRAM %02x->%02lx\n", reg, r->d[2]));
} else {
D(bug("Write XPRAM %02x<-%02lx\n", reg, r->d[2] & 0xff));
if (reg == 0x8a && !TwentyFourBitAddressing)
r->d[2] |= 0x05; // 32bit mode is always enabled if possible
XPRAM[reg] = r->d[2];
}
} else {
// PRAM, RTC and other clock registers
uint8 reg = (r->d[1] >> 2) & 0x1f;
if (reg >= 0x10 || (reg >= 0x08 && reg < 0x0c)) {
if (is_read) {
r->d[2] = XPRAM[reg];
D(bug("Read XPRAM %02x->%02x\n", reg, XPRAM[reg]));
} else {
D(bug("Write PRAM %02x<-%02lx\n", reg, r->d[2]));
XPRAM[reg] = r->d[2];
}
} else if (reg < 0x08 && is_read) {
uint32 t = TimerDateTime();
uint8 b = t;
switch (reg & 3) {
case 1: b = t >> 8; break;
case 2: b = t >> 16; break;
case 3: b = t >> 24; break;
}
r->d[2] = b;
} else
D(bug("RTC %s op %d, d1 %08lx d2 %08lx\n", is_read ? "read" : "write", reg, r->d[1], r->d[2]));
}
r->d[0] = 0;
r->d[1] = r->d[2];
break;
}
case M68K_EMUL_OP_READ_XPRAM: // Read from XPRAM (ROM10/11)
D(bug("Read XPRAM %02lx\n", r->d[1]));
r->d[1] = XPRAM[r->d[1] & 0xff];
break;
case M68K_EMUL_OP_READ_XPRAM2: // Read from XPRAM (ROM15)
D(bug("Read XPRAM %02lx\n", r->d[0]));
r->d[0] = XPRAM[r->d[0] & 0xff];
break;
case M68K_EMUL_OP_PATCH_BOOT_GLOBS: // Patch BootGlobs at startup
D(bug("Patch BootGlobs\n"));
WriteMacInt32(r->a[4] - 20, RAMBaseMac + RAMSize); // MemTop
WriteMacInt8(r->a[4] - 26, 0); // No MMU
WriteMacInt8(r->a[4] - 25, ReadMacInt8(r->a[4] - 25) | 1); // No MMU
r->a[6] = RAMBaseMac + RAMSize;
break;
case M68K_EMUL_OP_FIX_BOOTSTACK: // Set boot stack to 3/4 of RAM (7.5)
r->a[1] = RAMBaseMac + RAMSize * 3 / 4;
D(bug("Fix boot stack %08x\n", r->a[1]));
break;
case M68K_EMUL_OP_FIX_MEMSIZE: { // Set correct logical and physical memory size
D(bug("Fix MemSize\n"));
uint32 diff = ReadMacInt32(0x1ef8) - ReadMacInt32(0x1ef4); // Difference between logical and physical size
WriteMacInt32(0x1ef8, RAMSize); // Physical RAM size
WriteMacInt32(0x1ef4, RAMSize - diff); // Logical RAM size
break;
}
case M68K_EMUL_OP_ADBOP: // ADBOp() replacement
ADBOp(r->d[0], Mac2HostAddr(ReadMacInt32(r->a[0])));
break;
case M68K_EMUL_OP_INSTIME: // InsTime() replacement
r->d[0] = InsTime(r->a[0], r->d[1]);
break;
case M68K_EMUL_OP_RMVTIME: // RmvTime() replacement
r->d[0] = RmvTime(r->a[0]);
break;
case M68K_EMUL_OP_PRIMETIME: // PrimeTime() replacement
r->d[0] = PrimeTime(r->a[0], r->d[0]);
break;
case M68K_EMUL_OP_MICROSECONDS: // Microseconds() replacement
Microseconds(r->a[0], r->d[0]);
break;
case M68K_EMUL_OP_INSTALL_DRIVERS: {// Patch to install our own drivers during startup
// Install drivers
D(bug("InstallDrivers\n"));
InstallDrivers(r->a[0]);
// Install PutScrap() patch
M68kRegisters r;
r.d[0] = 0xa9fe;
r.a[0] = PutScrapPatch;
Execute68kTrap(0xa647, &r); // SetToolTrap()
// Setup fake ASC registers
if (ROMVersion == ROM_VERSION_32) {
r.d[0] = 0x1000;
Execute68kTrap(0xa71e, &r); // NewPtrSysClear()
uint32 asc_regs = r.a[0];
D(bug("ASC registers at %08lx\n", asc_regs));
WriteMacInt8(asc_regs + 0x800, 0x0f); // Set ASC version number
WriteMacInt32(0xcc0, asc_regs); // Set ASCBase
}
break;
}
case M68K_EMUL_OP_SERD: // Install serial drivers
D(bug("InstallSERD\n"));
InstallSERD();
break;
case M68K_EMUL_OP_SONY_OPEN: // Floppy driver functions
r->d[0] = SonyOpen(r->a[0], r->a[1]);
break;
case M68K_EMUL_OP_SONY_PRIME:
r->d[0] = SonyPrime(r->a[0], r->a[1]);
break;
case M68K_EMUL_OP_SONY_CONTROL:
r->d[0] = SonyControl(r->a[0], r->a[1]);
break;
case M68K_EMUL_OP_SONY_STATUS:
r->d[0] = SonyStatus(r->a[0], r->a[1]);
break;
case M68K_EMUL_OP_DISK_OPEN: // Disk driver functions
r->d[0] = DiskOpen(r->a[0], r->a[1]);
break;
case M68K_EMUL_OP_DISK_PRIME:
r->d[0] = DiskPrime(r->a[0], r->a[1]);
break;
case M68K_EMUL_OP_DISK_CONTROL:
r->d[0] = DiskControl(r->a[0], r->a[1]);
break;
case M68K_EMUL_OP_DISK_STATUS:
r->d[0] = DiskStatus(r->a[0], r->a[1]);
break;
case M68K_EMUL_OP_CDROM_OPEN: // CD-ROM driver functions
r->d[0] = CDROMOpen(r->a[0], r->a[1]);
break;
case M68K_EMUL_OP_CDROM_PRIME:
r->d[0] = CDROMPrime(r->a[0], r->a[1]);
break;
case M68K_EMUL_OP_CDROM_CONTROL:
r->d[0] = CDROMControl(r->a[0], r->a[1]);
break;
case M68K_EMUL_OP_CDROM_STATUS:
r->d[0] = CDROMStatus(r->a[0], r->a[1]);
break;
case M68K_EMUL_OP_VIDEO_OPEN: // Video driver functions
r->d[0] = VideoDriverOpen(r->a[0], r->a[1]);
break;
case M68K_EMUL_OP_VIDEO_CONTROL:
r->d[0] = VideoDriverControl(r->a[0], r->a[1]);
break;
case M68K_EMUL_OP_VIDEO_STATUS:
r->d[0] = VideoDriverStatus(r->a[0], r->a[1]);
break;
case M68K_EMUL_OP_SERIAL_OPEN: // Serial driver functions
r->d[0] = SerialOpen(r->a[0], r->a[1], r->d[0]);
break;
case M68K_EMUL_OP_SERIAL_PRIME:
r->d[0] = SerialPrime(r->a[0], r->a[1], r->d[0]);
break;
case M68K_EMUL_OP_SERIAL_CONTROL:
r->d[0] = SerialControl(r->a[0], r->a[1], r->d[0]);
break;
case M68K_EMUL_OP_SERIAL_STATUS:
r->d[0] = SerialStatus(r->a[0], r->a[1], r->d[0]);
break;
case M68K_EMUL_OP_SERIAL_CLOSE:
r->d[0] = SerialClose(r->a[0], r->a[1], r->d[0]);
break;
case M68K_EMUL_OP_ETHER_OPEN: // Ethernet driver functions
r->d[0] = EtherOpen(r->a[0], r->a[1]);
break;
case M68K_EMUL_OP_ETHER_CONTROL:
r->d[0] = EtherControl(r->a[0], r->a[1]);
break;
case M68K_EMUL_OP_ETHER_READ_PACKET:
EtherReadPacket((uint8 **)&r->a[0], r->a[3], r->d[3], r->d[1]);
break;
case M68K_EMUL_OP_SOUNDIN_OPEN: // Sound input driver functions
r->d[0] = SoundInOpen(r->a[0], r->a[1]);
break;
case M68K_EMUL_OP_SOUNDIN_PRIME:
r->d[0] = SoundInPrime(r->a[0], r->a[1]);
break;
case M68K_EMUL_OP_SOUNDIN_CONTROL:
r->d[0] = SoundInControl(r->a[0], r->a[1]);
break;
case M68K_EMUL_OP_SOUNDIN_STATUS:
r->d[0] = SoundInStatus(r->a[0], r->a[1]);
break;
case M68K_EMUL_OP_SOUNDIN_CLOSE:
r->d[0] = SoundInClose(r->a[0], r->a[1]);
break;
case M68K_EMUL_OP_SCSI_DISPATCH: { // SCSIDispatch() replacement
uint32 ret = ReadMacInt32(r->a[7]); // Get return address
uint16 sel = ReadMacInt16(r->a[7] + 4); // Get selector
r->a[7] += 6;
int stack = 0;
switch (sel) {
case 0: // SCSIReset
WriteMacInt16(r->a[7], SCSIReset());
stack = 0;
break;
case 1: // SCSIGet
WriteMacInt16(r->a[7], SCSIGet());
stack = 0;
break;
case 2: // SCSISelect
case 11: // SCSISelAtn
WriteMacInt16(r->a[7] + 2, SCSISelect(ReadMacInt16(r->a[7]) & 0xff));
stack = 2;
break;
case 3: // SCSICmd
WriteMacInt16(r->a[7] + 6, SCSICmd(ReadMacInt16(r->a[7]), Mac2HostAddr(ReadMacInt32(r->a[7] + 2))));
stack = 6;
break;
case 4: // SCSIComplete
WriteMacInt16(r->a[7] + 12, SCSIComplete(ReadMacInt32(r->a[7]), ReadMacInt32(r->a[7] + 4), ReadMacInt32(r->a[7] + 8)));
stack = 12;
break;
case 5: // SCSIRead
case 8: // SCSIRBlind
WriteMacInt16(r->a[7] + 4, SCSIRead(ReadMacInt32(r->a[7])));
stack = 4;
break;
case 6: // SCSIWrite
case 9: // SCSIWBlind
WriteMacInt16(r->a[7] + 4, SCSIWrite(ReadMacInt32(r->a[7])));
stack = 4;
break;
case 10: // SCSIStat
WriteMacInt16(r->a[7], SCSIStat());
stack = 0;
break;
case 12: // SCSIMsgIn
WriteMacInt16(r->a[7] + 4, 0);
stack = 4;
break;
case 13: // SCSIMsgOut
WriteMacInt16(r->a[7] + 2, 0);
stack = 2;
break;
case 14: // SCSIMgrBusy
WriteMacInt16(r->a[7], SCSIMgrBusy());
stack = 0;
break;
default:
printf("FATAL: SCSIDispatch(%d): illegal selector\n", sel);
QuitEmulator();
break;
}
r->a[0] = ret; // "rtd" emulation, a0 = return address, a1 = new stack pointer
r->a[1] = r->a[7] + stack;
break;
}
case M68K_EMUL_OP_IRQ: // Level 1 interrupt
r->d[0] = 0;
if (InterruptFlags & INTFLAG_60HZ) {
ClearInterruptFlag(INTFLAG_60HZ);
// Increment Ticks variable
WriteMacInt32(0x16a, ReadMacInt32(0x16a) + 1);
if (HasMacStarted()) {
// Mac has started, execute all 60Hz interrupt functions
TimerInterrupt();
VideoInterrupt();
// Call DoVBLTask(0)
if (ROMVersion == ROM_VERSION_32) {
M68kRegisters r2;
r2.d[0] = 0;
Execute68kTrap(0xa072, &r2);
}
r->d[0] = 1; // Flag: 68k interrupt routine executes VBLTasks etc.
}
}
if (InterruptFlags & INTFLAG_1HZ) {
ClearInterruptFlag(INTFLAG_1HZ);
if (HasMacStarted()) {
SonyInterrupt();
DiskInterrupt();
CDROMInterrupt();
}
}
if (InterruptFlags & INTFLAG_SERIAL) {
ClearInterruptFlag(INTFLAG_SERIAL);
SerialInterrupt();
}
if (InterruptFlags & INTFLAG_ETHER) {
ClearInterruptFlag(INTFLAG_ETHER);
EtherInterrupt();
}
if (InterruptFlags & INTFLAG_AUDIO) {
ClearInterruptFlag(INTFLAG_AUDIO);
AudioInterrupt();
}
if (InterruptFlags & INTFLAG_ADB) {
ClearInterruptFlag(INTFLAG_ADB);
if (HasMacStarted())
ADBInterrupt();
}
if (InterruptFlags & INTFLAG_NMI) {
ClearInterruptFlag(INTFLAG_NMI);
if (HasMacStarted())
TriggerNMI();
}
break;
case M68K_EMUL_OP_PUT_SCRAP: { // PutScrap() patch
void *scrap = Mac2HostAddr(ReadMacInt32(r->a[7] + 4));
uint32 type = ReadMacInt32(r->a[7] + 8);
int32 length = ReadMacInt32(r->a[7] + 12);
PutScrap(type, scrap, length);
break;
}
case M68K_EMUL_OP_CHECKLOAD: { // vCheckLoad() patch (resource loader)
uint32 type = r->d[1];
int16 id = ReadMacInt16(r->a[2]);
if (r->a[0] == 0)
break;
uint32 adr = ReadMacInt32(r->a[0]);
if (adr == 0)
break;
uint8 *p = Mac2HostAddr(adr);
uint32 size = ReadMacInt32(adr - 8) & 0xffffff;
CheckLoad(type, id, p, size);
break;
}
case M68K_EMUL_OP_AUDIO: // Audio component dispatch function
r->d[0] = AudioDispatch(r->a[3], r->a[4]);
break;
#if SUPPORTS_EXTFS
case M68K_EMUL_OP_EXTFS_COMM: // External file system routines
WriteMacInt16(r->a[7] + 14, ExtFSComm(ReadMacInt16(r->a[7] + 12), ReadMacInt32(r->a[7] + 8), ReadMacInt32(r->a[7] + 4)));
break;
case M68K_EMUL_OP_EXTFS_HFS:
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)));
break;
#endif
case M68K_EMUL_OP_BLOCK_MOVE: // BlockMove() cache flushing
FlushCodeCache(Mac2HostAddr(r->a[0]), r->a[1]);
break;
case M68K_EMUL_OP_DEBUGUTIL:
// printf("DebugUtil d0=%08lx a5=%08lx\n", r->d[0], r->a[5]);
r->d[0] = DebugUtil(r->d[0]);
break;
default:
printf("FATAL: EMUL_OP called with bogus opcode %08x\n", opcode);
printf("d0 %08x d1 %08x d2 %08x d3 %08x\n"
"d4 %08x d5 %08x d6 %08x d7 %08x\n"
"a0 %08x a1 %08x a2 %08x a3 %08x\n"
"a4 %08x a5 %08x a6 %08x a7 %08x\n"
"sr %04x\n",
r->d[0], r->d[1], r->d[2], r->d[3], r->d[4], r->d[5], r->d[6], r->d[7],
r->a[0], r->a[1], r->a[2], r->a[3], r->a[4], r->a[5], r->a[6], r->a[7],
r->sr);
#ifdef ENABLE_MON
char *arg[4] = {"mon", "-m", "-r", NULL};
mon(3, arg);
#endif
QuitEmulator();
break;
}
}