BasiliskII/src/emul_op.cpp

/*
 *  emul_op.cpp - 68k opcodes for ROM patches
 *
 *  Basilisk II (C) 1997-2004 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;
        }
}
Revision:	1.30
Committed:	2004-01-12T15:29:21Z (20 years, 4 months ago) by cebix
Branch:	MAIN
CVS Tags:	nigel-build-16, nigel-build-15
Changes since 1.29:	+1 -1 lines
Log Message:	Happy New Year! :)
#	User	Rev	Content
1	cebix	1.1	/*
2			* emul_op.cpp - 68k opcodes for ROM patches
3			*
4	cebix	1.30	* Basilisk II (C) 1997-2004 Christian Bauer
5	cebix	1.1	*
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	1.16	#ifdef ENABLE_MON
46	cebix	1.8	#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	cebix	1.27	printf("d0 %08x d1 %08x d2 %08x d3 %08x\n"
64			"d4 %08x d5 %08x d6 %08x d7 %08x\n"
65			"a0 %08x a1 %08x a2 %08x a3 %08x\n"
66			"a4 %08x a5 %08x a6 %08x a7 %08x\n"
67	cebix	1.1	"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	1.25	VideoQuitFullScreen();
72	cebix	1.16	#ifdef ENABLE_MON
73	cebix	1.20	char *arg[4] = {"mon", "-m", "-r", NULL};
74			mon(3, arg);
75	cebix	1.8	#endif
76	cebix	1.1	QuitEmulator();
77			break;
78			}
79
80			case M68K_EMUL_OP_SHUTDOWN: // Quit emulator
81			QuitEmulator();
82			break;
83
84			case M68K_EMUL_OP_RESET: { // MacOS reset
85			D(bug("* RESET *\n"));
86			TimerReset();
87			EtherReset();
88	cebix	1.14	AudioReset();
89	cebix	1.1
90			// Create BootGlobs at top of memory
91	cebix	1.12	Mac_memset(RAMBaseMac + RAMSize - 4096, 0, 4096);
92	cebix	1.1	uint32 boot_globs = RAMBaseMac + RAMSize - 0x1c;
93			WriteMacInt32(boot_globs + 0x00, RAMBaseMac); // First RAM bank
94			WriteMacInt32(boot_globs + 0x04, RAMSize);
95			WriteMacInt32(boot_globs + 0x08, 0xffffffff); // End of bank table
96			WriteMacInt32(boot_globs + 0x0c, 0);
97
98			// Setup registers for boot routine
99			r->d[0] = ReadMacInt32(ROMBaseMac + UniversalInfo + 0x18); // AddrMapFlags
100			r->d[1] = ReadMacInt32(ROMBaseMac + UniversalInfo + 0x1c); // UnivROMFlags
101			r->d[2] = ReadMacInt32(ROMBaseMac + UniversalInfo + 0x10); // HWCfgFlags/IDs
102			if (FPUType)
103			r->d[2] \|= 0x10000000; // Set FPU flag if FPU present
104			else
105			r->d[2] &= 0xefffffff; // Clear FPU flag if no FPU present
106			r->a[0] = ROMBaseMac + UniversalInfo + ReadMacInt32(ROMBaseMac + UniversalInfo);// AddrMap
107			r->a[1] = ROMBaseMac + UniversalInfo; // UniversalInfo
108			r->a[6] = boot_globs; // BootGlobs
109			r->a[7] = RAMBaseMac + 0x10000; // Boot stack
110			break;
111			}
112
113			case M68K_EMUL_OP_CLKNOMEM: { // Clock/PRAM operations
114			bool is_read = r->d[1] & 0x80;
115			if ((r->d[1] & 0x78) == 0x38) {
116			// XPRAM
117			uint8 reg = (r->d[1] << 5) & 0xe0 \| (r->d[1] >> 10) & 0x1f;
118			if (is_read) {
119			r->d[2] = XPRAM[reg];
120			bool localtalk = !(XPRAM[0xe0] \|\| XPRAM[0xe1]); // LocalTalk enabled?
121			switch (reg) {
122			case 0x08:
123			if (ROMVersion != ROM_VERSION_32)
124			r->d[2] &= 0xf8;
125			break;
126			case 0x8a:
127			r->d[2] \|= 0x05; // 32bit mode is always enabled
128			break;
129			case 0xe0: // Disable LocalTalk (use EtherTalk instead)
130			if (localtalk)
131			r->d[2] = 0x00;
132			break;
133			case 0xe1:
134			if (localtalk)
135			r->d[2] = 0xf1;
136			break;
137			case 0xe2:
138			if (localtalk)
139			r->d[2] = 0x00;
140			break;
141			case 0xe3:
142			if (localtalk)
143			r->d[2] = 0x0a;
144			break;
145			}
146			D(bug("Read XPRAM %02x->%02lx\n", reg, r->d[2]));
147			} else {
148			D(bug("Write XPRAM %02x<-%02lx\n", reg, r->d[2] & 0xff));
149			if (reg == 0x8a && !TwentyFourBitAddressing)
150			r->d[2] \|= 0x05; // 32bit mode is always enabled if possible
151			XPRAM[reg] = r->d[2];
152			}
153			} else {
154			// PRAM, RTC and other clock registers
155			uint8 reg = (r->d[1] >> 2) & 0x1f;
156			if (reg >= 0x10 \|\| (reg >= 0x08 && reg < 0x0c)) {
157			if (is_read) {
158			r->d[2] = XPRAM[reg];
159			D(bug("Read XPRAM %02x->%02x\n", reg, XPRAM[reg]));
160			} else {
161			D(bug("Write PRAM %02x<-%02lx\n", reg, r->d[2]));
162			XPRAM[reg] = r->d[2];
163			}
164			} else if (reg < 0x08 && is_read) {
165			uint32 t = TimerDateTime();
166	cebix	1.2	uint8 b = t;
167	cebix	1.1	switch (reg & 3) {
168			case 1: b = t >> 8; break;
169			case 2: b = t >> 16; break;
170			case 3: b = t >> 24; break;
171			}
172			r->d[2] = b;
173			} else
174			D(bug("RTC %s op %d, d1 %08lx d2 %08lx\n", is_read ? "read" : "write", reg, r->d[1], r->d[2]));
175			}
176			r->d[0] = 0;
177			r->d[1] = r->d[2];
178			break;
179			}
180
181			case M68K_EMUL_OP_READ_XPRAM: // Read from XPRAM (ROM10/11)
182			D(bug("Read XPRAM %02lx\n", r->d[1]));
183			r->d[1] = XPRAM[r->d[1] & 0xff];
184			break;
185
186			case M68K_EMUL_OP_READ_XPRAM2: // Read from XPRAM (ROM15)
187			D(bug("Read XPRAM %02lx\n", r->d[0]));
188			r->d[0] = XPRAM[r->d[0] & 0xff];
189			break;
190
191			case M68K_EMUL_OP_PATCH_BOOT_GLOBS: // Patch BootGlobs at startup
192			D(bug("Patch BootGlobs\n"));
193			WriteMacInt32(r->a[4] - 20, RAMBaseMac + RAMSize); // MemTop
194			WriteMacInt8(r->a[4] - 26, 0); // No MMU
195			WriteMacInt8(r->a[4] - 25, ReadMacInt8(r->a[4] - 25) \| 1); // No MMU
196			r->a[6] = RAMBaseMac + RAMSize;
197			break;
198
199			case M68K_EMUL_OP_FIX_BOOTSTACK: // Set boot stack to 3/4 of RAM (7.5)
200			r->a[1] = RAMBaseMac + RAMSize * 3 / 4;
201	cebix	1.16	D(bug("Fix boot stack %08x\n", r->a[1]));
202	cebix	1.1	break;
203
204			case M68K_EMUL_OP_FIX_MEMSIZE: { // Set correct logical and physical memory size
205			D(bug("Fix MemSize\n"));
206			uint32 diff = ReadMacInt32(0x1ef8) - ReadMacInt32(0x1ef4); // Difference between logical and physical size
207			WriteMacInt32(0x1ef8, RAMSize); // Physical RAM size
208			WriteMacInt32(0x1ef4, RAMSize - diff); // Logical RAM size
209			break;
210			}
211
212			case M68K_EMUL_OP_ADBOP: // ADBOp() replacement
213			ADBOp(r->d[0], Mac2HostAddr(ReadMacInt32(r->a[0])));
214			break;
215
216			case M68K_EMUL_OP_INSTIME: // InsTime() replacement
217			r->d[0] = InsTime(r->a[0], r->d[1]);
218			break;
219
220			case M68K_EMUL_OP_RMVTIME: // RmvTime() replacement
221			r->d[0] = RmvTime(r->a[0]);
222			break;
223
224			case M68K_EMUL_OP_PRIMETIME: // PrimeTime() replacement
225			r->d[0] = PrimeTime(r->a[0], r->d[0]);
226			break;
227
228			case M68K_EMUL_OP_MICROSECONDS: // Microseconds() replacement
229			Microseconds(r->a[0], r->d[0]);
230			break;
231
232			case M68K_EMUL_OP_INSTALL_DRIVERS: {// Patch to install our own drivers during startup
233			// Install drivers
234			D(bug("InstallDrivers\n"));
235			InstallDrivers(r->a[0]);
236
237			// Install PutScrap() patch
238			M68kRegisters r;
239			r.d[0] = 0xa9fe;
240			r.a[0] = PutScrapPatch;
241			Execute68kTrap(0xa647, &r); // SetToolTrap()
242
243			// Setup fake ASC registers
244			if (ROMVersion == ROM_VERSION_32) {
245			r.d[0] = 0x1000;
246			Execute68kTrap(0xa71e, &r); // NewPtrSysClear()
247			uint32 asc_regs = r.a[0];
248			D(bug("ASC registers at %08lx\n", asc_regs));
249			WriteMacInt8(asc_regs + 0x800, 0x0f); // Set ASC version number
250			WriteMacInt32(0xcc0, asc_regs); // Set ASCBase
251			}
252			break;
253			}
254
255			case M68K_EMUL_OP_SERD: // Install serial drivers
256			D(bug("InstallSERD\n"));
257			InstallSERD();
258			break;
259
260			case M68K_EMUL_OP_SONY_OPEN: // Floppy driver functions
261			r->d[0] = SonyOpen(r->a[0], r->a[1]);
262			break;
263
264			case M68K_EMUL_OP_SONY_PRIME:
265			r->d[0] = SonyPrime(r->a[0], r->a[1]);
266			break;
267
268			case M68K_EMUL_OP_SONY_CONTROL:
269			r->d[0] = SonyControl(r->a[0], r->a[1]);
270			break;
271
272			case M68K_EMUL_OP_SONY_STATUS:
273			r->d[0] = SonyStatus(r->a[0], r->a[1]);
274			break;
275
276			case M68K_EMUL_OP_DISK_OPEN: // Disk driver functions
277			r->d[0] = DiskOpen(r->a[0], r->a[1]);
278			break;
279
280			case M68K_EMUL_OP_DISK_PRIME:
281			r->d[0] = DiskPrime(r->a[0], r->a[1]);
282			break;
283
284			case M68K_EMUL_OP_DISK_CONTROL:
285			r->d[0] = DiskControl(r->a[0], r->a[1]);
286			break;
287
288			case M68K_EMUL_OP_DISK_STATUS:
289			r->d[0] = DiskStatus(r->a[0], r->a[1]);
290			break;
291
292			case M68K_EMUL_OP_CDROM_OPEN: // CD-ROM driver functions
293			r->d[0] = CDROMOpen(r->a[0], r->a[1]);
294			break;
295
296			case M68K_EMUL_OP_CDROM_PRIME:
297			r->d[0] = CDROMPrime(r->a[0], r->a[1]);
298			break;
299
300			case M68K_EMUL_OP_CDROM_CONTROL:
301			r->d[0] = CDROMControl(r->a[0], r->a[1]);
302			break;
303
304			case M68K_EMUL_OP_CDROM_STATUS:
305			r->d[0] = CDROMStatus(r->a[0], r->a[1]);
306			break;
307
308			case M68K_EMUL_OP_VIDEO_OPEN: // Video driver functions
309	cebix	1.5	r->d[0] = VideoDriverOpen(r->a[0], r->a[1]);
310	cebix	1.1	break;
311
312			case M68K_EMUL_OP_VIDEO_CONTROL:
313	cebix	1.5	r->d[0] = VideoDriverControl(r->a[0], r->a[1]);
314	cebix	1.1	break;
315
316			case M68K_EMUL_OP_VIDEO_STATUS:
317	cebix	1.5	r->d[0] = VideoDriverStatus(r->a[0], r->a[1]);
318	cebix	1.1	break;
319
320			case M68K_EMUL_OP_SERIAL_OPEN: // Serial driver functions
321			r->d[0] = SerialOpen(r->a[0], r->a[1], r->d[0]);
322			break;
323
324			case M68K_EMUL_OP_SERIAL_PRIME:
325			r->d[0] = SerialPrime(r->a[0], r->a[1], r->d[0]);
326			break;
327
328			case M68K_EMUL_OP_SERIAL_CONTROL:
329			r->d[0] = SerialControl(r->a[0], r->a[1], r->d[0]);
330			break;
331
332			case M68K_EMUL_OP_SERIAL_STATUS:
333			r->d[0] = SerialStatus(r->a[0], r->a[1], r->d[0]);
334			break;
335
336			case M68K_EMUL_OP_SERIAL_CLOSE:
337			r->d[0] = SerialClose(r->a[0], r->a[1], r->d[0]);
338			break;
339
340			case M68K_EMUL_OP_ETHER_OPEN: // Ethernet driver functions
341			r->d[0] = EtherOpen(r->a[0], r->a[1]);
342			break;
343
344			case M68K_EMUL_OP_ETHER_CONTROL:
345			r->d[0] = EtherControl(r->a[0], r->a[1]);
346			break;
347
348			case M68K_EMUL_OP_ETHER_READ_PACKET:
349			EtherReadPacket((uint8 **)&r->a[0], r->a[3], r->d[3], r->d[1]);
350			break;
351
352	cebix	1.18	case M68K_EMUL_OP_SOUNDIN_OPEN: // Sound input driver functions
353			r->d[0] = SoundInOpen(r->a[0], r->a[1]);
354			break;
355
356			case M68K_EMUL_OP_SOUNDIN_PRIME:
357			r->d[0] = SoundInPrime(r->a[0], r->a[1]);
358			break;
359
360			case M68K_EMUL_OP_SOUNDIN_CONTROL:
361			r->d[0] = SoundInControl(r->a[0], r->a[1]);
362			break;
363
364			case M68K_EMUL_OP_SOUNDIN_STATUS:
365			r->d[0] = SoundInStatus(r->a[0], r->a[1]);
366			break;
367
368			case M68K_EMUL_OP_SOUNDIN_CLOSE:
369			r->d[0] = SoundInClose(r->a[0], r->a[1]);
370			break;
371
372	cebix	1.1	case M68K_EMUL_OP_SCSI_DISPATCH: { // SCSIDispatch() replacement
373			uint32 ret = ReadMacInt32(r->a[7]); // Get return address
374			uint16 sel = ReadMacInt16(r->a[7] + 4); // Get selector
375			r->a[7] += 6;
376			int stack = 0;
377			switch (sel) {
378			case 0: // SCSIReset
379			WriteMacInt16(r->a[7], SCSIReset());
380			stack = 0;
381			break;
382			case 1: // SCSIGet
383			WriteMacInt16(r->a[7], SCSIGet());
384			stack = 0;
385			break;
386			case 2: // SCSISelect
387			case 11: // SCSISelAtn
388			WriteMacInt16(r->a[7] + 2, SCSISelect(ReadMacInt16(r->a[7]) & 0xff));
389			stack = 2;
390			break;
391			case 3: // SCSICmd
392			WriteMacInt16(r->a[7] + 6, SCSICmd(ReadMacInt16(r->a[7]), Mac2HostAddr(ReadMacInt32(r->a[7] + 2))));
393			stack = 6;
394			break;
395			case 4: // SCSIComplete
396			WriteMacInt16(r->a[7] + 12, SCSIComplete(ReadMacInt32(r->a[7]), ReadMacInt32(r->a[7] + 4), ReadMacInt32(r->a[7] + 8)));
397			stack = 12;
398			break;
399			case 5: // SCSIRead
400			case 8: // SCSIRBlind
401			WriteMacInt16(r->a[7] + 4, SCSIRead(ReadMacInt32(r->a[7])));
402			stack = 4;
403			break;
404			case 6: // SCSIWrite
405			case 9: // SCSIWBlind
406			WriteMacInt16(r->a[7] + 4, SCSIWrite(ReadMacInt32(r->a[7])));
407			stack = 4;
408			break;
409			case 10: // SCSIStat
410			WriteMacInt16(r->a[7], SCSIStat());
411			stack = 0;
412			break;
413			case 12: // SCSIMsgIn
414			WriteMacInt16(r->a[7] + 4, 0);
415			stack = 4;
416			break;
417			case 13: // SCSIMsgOut
418			WriteMacInt16(r->a[7] + 2, 0);
419			stack = 2;
420			break;
421			case 14: // SCSIMgrBusy
422			WriteMacInt16(r->a[7], SCSIMgrBusy());
423			stack = 0;
424			break;
425			default:
426			printf("FATAL: SCSIDispatch(%d): illegal selector\n", sel);
427			QuitEmulator();
428			break;
429			}
430			r->a[0] = ret; // "rtd" emulation, a0 = return address, a1 = new stack pointer
431			r->a[1] = r->a[7] + stack;
432			break;
433			}
434
435			case M68K_EMUL_OP_IRQ: // Level 1 interrupt
436			r->d[0] = 0;
437	cebix	1.15
438	cebix	1.1	if (InterruptFlags & INTFLAG_60HZ) {
439			ClearInterruptFlag(INTFLAG_60HZ);
440	cebix	1.29
441			// Increment Ticks variable
442			WriteMacInt32(0x16a, ReadMacInt32(0x16a) + 1);
443
444	cebix	1.1	if (HasMacStarted()) {
445
446	cebix	1.3	// Mac has started, execute all 60Hz interrupt functions
447	cebix	1.1	TimerInterrupt();
448			VideoInterrupt();
449
450			// Call DoVBLTask(0)
451			if (ROMVersion == ROM_VERSION_32) {
452			M68kRegisters r2;
453			r2.d[0] = 0;
454			Execute68kTrap(0xa072, &r2);
455			}
456
457			r->d[0] = 1; // Flag: 68k interrupt routine executes VBLTasks etc.
458			}
459			}
460	cebix	1.15
461			if (InterruptFlags & INTFLAG_1HZ) {
462			ClearInterruptFlag(INTFLAG_1HZ);
463			if (HasMacStarted()) {
464			SonyInterrupt();
465			DiskInterrupt();
466			CDROMInterrupt();
467			}
468			}
469
470	cebix	1.1	if (InterruptFlags & INTFLAG_SERIAL) {
471			ClearInterruptFlag(INTFLAG_SERIAL);
472			SerialInterrupt();
473			}
474	cebix	1.15
475	cebix	1.1	if (InterruptFlags & INTFLAG_ETHER) {
476			ClearInterruptFlag(INTFLAG_ETHER);
477			EtherInterrupt();
478			}
479	cebix	1.15
480	cebix	1.1	if (InterruptFlags & INTFLAG_AUDIO) {
481			ClearInterruptFlag(INTFLAG_AUDIO);
482			AudioInterrupt();
483			}
484	jlachmann	1.19
485	cebix	1.26	if (InterruptFlags & INTFLAG_ADB) {
486			ClearInterruptFlag(INTFLAG_ADB);
487			if (HasMacStarted())
488			ADBInterrupt();
489			}
490
491	jlachmann	1.19	if (InterruptFlags & INTFLAG_NMI) {
492			ClearInterruptFlag(INTFLAG_NMI);
493	cebix	1.26	if (HasMacStarted())
494	jlachmann	1.19	TriggerNMI();
495			}
496	cebix	1.1	break;
497
498			case M68K_EMUL_OP_PUT_SCRAP: { // PutScrap() patch
499			void *scrap = Mac2HostAddr(ReadMacInt32(r->a[7] + 4));
500			uint32 type = ReadMacInt32(r->a[7] + 8);
501			int32 length = ReadMacInt32(r->a[7] + 12);
502			PutScrap(type, scrap, length);
503			break;
504			}
505
506			case M68K_EMUL_OP_CHECKLOAD: { // vCheckLoad() patch (resource loader)
507			uint32 type = r->d[1];
508			int16 id = ReadMacInt16(r->a[2]);
509			if (r->a[0] == 0)
510			break;
511			uint32 adr = ReadMacInt32(r->a[0]);
512			if (adr == 0)
513			break;
514			uint8 *p = Mac2HostAddr(adr);
515			uint32 size = ReadMacInt32(adr - 8) & 0xffffff;
516			CheckLoad(type, id, p, size);
517			break;
518			}
519
520			case M68K_EMUL_OP_AUDIO: // Audio component dispatch function
521			r->d[0] = AudioDispatch(r->a[3], r->a[4]);
522	cebix	1.4	break;
523
524	cebix	1.6	#if SUPPORTS_EXTFS
525	cebix	1.4	case M68K_EMUL_OP_EXTFS_COMM: // External file system routines
526			WriteMacInt16(r->a[7] + 14, ExtFSComm(ReadMacInt16(r->a[7] + 12), ReadMacInt32(r->a[7] + 8), ReadMacInt32(r->a[7] + 4)));
527			break;
528
529			case M68K_EMUL_OP_EXTFS_HFS:
530			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)));
531	cebix	1.1	break;
532	cebix	1.6	#endif
533	cebix	1.1
534	cebix	1.21	case M68K_EMUL_OP_BLOCK_MOVE: // BlockMove() cache flushing
535			FlushCodeCache(Mac2HostAddr(r->a[0]), r->a[1]);
536	cebix	1.7	break;
537
538	jlachmann	1.19	case M68K_EMUL_OP_DEBUGUTIL:
539			// printf("DebugUtil d0=%08lx a5=%08lx\n", r->d[0], r->a[5]);
540			r->d[0] = DebugUtil(r->d[0]);
541			break;
542
543	cebix	1.1	default:
544	jlachmann	1.19	printf("FATAL: EMUL_OP called with bogus opcode %08x\n", opcode);
545	cebix	1.27	printf("d0 %08x d1 %08x d2 %08x d3 %08x\n"
546			"d4 %08x d5 %08x d6 %08x d7 %08x\n"
547			"a0 %08x a1 %08x a2 %08x a3 %08x\n"
548			"a4 %08x a5 %08x a6 %08x a7 %08x\n"
549	cebix	1.1	"sr %04x\n",
550			r->d[0], r->d[1], r->d[2], r->d[3], r->d[4], r->d[5], r->d[6], r->d[7],
551			r->a[0], r->a[1], r->a[2], r->a[3], r->a[4], r->a[5], r->a[6], r->a[7],
552			r->sr);
553	cebix	1.16	#ifdef ENABLE_MON
554	cebix	1.20	char *arg[4] = {"mon", "-m", "-r", NULL};
555			mon(3, arg);
556	cebix	1.9	#endif
557	cebix	1.1	QuitEmulator();
558			break;
559			}
560			}