505 lines
14 KiB
C++
505 lines
14 KiB
C++
/*
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* emul_op.cpp - 68k opcodes for ROM patches
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*
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* SheepShaver (C) 1997-2008 Christian Bauer and Marc Hellwig
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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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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <stdio.h>
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#include "sysdeps.h"
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#include "main.h"
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#include "version.h"
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#include "prefs.h"
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#include "cpu_emulation.h"
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#include "xlowmem.h"
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#include "xpram.h"
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#include "timer.h"
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#include "adb.h"
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#include "sony.h"
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#include "disk.h"
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#include "cdrom.h"
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#include "scsi.h"
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#include "video.h"
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#include "audio.h"
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#include "ether.h"
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#include "serial.h"
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#include "clip.h"
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#include "extfs.h"
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#include "macos_util.h"
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#include "rom_patches.h"
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#include "rsrc_patches.h"
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#include "name_registry.h"
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#include "user_strings.h"
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#include "emul_op.h"
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#include "thunks.h"
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#define DEBUG 0
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#include "debug.h"
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extern bool tick_inhibit;
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void PlayStartupSound();
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// TVector of MakeExecutable
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static uint32 MakeExecutableTvec;
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/*
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* Execute EMUL_OP opcode (called by 68k emulator)
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*/
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void EmulOp(M68kRegisters *r, uint32 pc, int selector)
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{
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D(bug("EmulOp %04x at %08x\n", selector, pc));
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switch (selector) {
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case OP_BREAK: // Breakpoint
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printf("*** Breakpoint\n");
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Dump68kRegs(r);
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break;
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case OP_XPRAM1: { // Read/write from/to XPRam
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uint32 len = r->d[3];
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uint8 *adr = Mac2HostAddr(r->a[3]);
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D(bug("XPRAMReadWrite d3: %08lx, a3: %p\n", len, adr));
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int ofs = len & 0xffff;
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len >>= 16;
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if (len & 0x8000) {
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len &= 0x7fff;
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for (uint32 i=0; i<len; i++)
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XPRAM[((ofs + i) & 0xff) + 0x1300] = *adr++;
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} else {
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for (uint32 i=0; i<len; i++)
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*adr++ = XPRAM[((ofs + i) & 0xff) + 0x1300];
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}
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break;
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}
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case OP_XPRAM2: // Read from XPRam
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r->d[1] = XPRAM[(r->d[1] & 0xff) + 0x1300];
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break;
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case OP_XPRAM3: // Write to XPRam
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XPRAM[(r->d[1] & 0xff) + 0x1300] = r->d[2];
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break;
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case OP_NVRAM1: { // Read from NVRAM
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int ofs = r->d[0];
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r->d[0] = XPRAM[ofs & 0x1fff];
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bool localtalk = !(XPRAM[0x13e0] || XPRAM[0x13e1]); // LocalTalk enabled?
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switch (ofs) {
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case 0x13e0: // Disable LocalTalk (use EtherTalk instead)
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if (localtalk)
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r->d[0] = 0x00;
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break;
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case 0x13e1:
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if (localtalk)
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r->d[0] = 0x01;
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break;
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case 0x13e2:
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if (localtalk)
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r->d[0] = 0x00;
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break;
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case 0x13e3:
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if (localtalk)
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r->d[0] = 0x0a;
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break;
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}
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break;
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}
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case OP_NVRAM2: // Write to NVRAM
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XPRAM[r->d[0] & 0x1fff] = r->d[1];
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break;
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case OP_NVRAM3: // Read/write from/to NVRAM
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if (r->d[3]) {
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r->d[0] = XPRAM[(r->d[4] + 0x1300) & 0x1fff];
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} else {
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XPRAM[(r->d[4] + 0x1300) & 0x1fff] = r->d[5];
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r->d[0] = 0;
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}
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break;
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case OP_FIX_MEMTOP: // Fixes MemTop in BootGlobs during startup
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D(bug("Fix MemTop\n"));
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WriteMacInt32(BootGlobsAddr - 20, RAMBase + RAMSize); // MemTop
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r->a[6] = RAMBase + RAMSize;
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break;
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case OP_FIX_MEMSIZE: { // Fixes physical/logical RAM size during startup
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D(bug("Fix MemSize\n"));
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uint32 diff = ReadMacInt32(0x1ef8) - ReadMacInt32(0x1ef4);
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WriteMacInt32(0x1ef8, RAMSize); // Physical RAM size
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WriteMacInt32(0x1ef4, RAMSize - diff); // Logical RAM size
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break;
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}
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case OP_FIX_BOOTSTACK: // Fixes boot stack pointer in boot 3 resource
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D(bug("Fix BootStack\n"));
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r->a[1] = r->a[7] = RAMBase + RAMSize * 3 / 4;
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break;
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case OP_SONY_OPEN: // Floppy driver functions
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r->d[0] = SonyOpen(r->a[0], r->a[1]);
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break;
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case OP_SONY_PRIME:
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r->d[0] = SonyPrime(r->a[0], r->a[1]);
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break;
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case OP_SONY_CONTROL:
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r->d[0] = SonyControl(r->a[0], r->a[1]);
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break;
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case OP_SONY_STATUS:
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r->d[0] = SonyStatus(r->a[0], r->a[1]);
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break;
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case OP_DISK_OPEN: // Disk driver functions
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r->d[0] = DiskOpen(r->a[0], r->a[1]);
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break;
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case OP_DISK_PRIME:
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r->d[0] = DiskPrime(r->a[0], r->a[1]);
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break;
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case OP_DISK_CONTROL:
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r->d[0] = DiskControl(r->a[0], r->a[1]);
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break;
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case OP_DISK_STATUS:
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r->d[0] = DiskStatus(r->a[0], r->a[1]);
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break;
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case OP_CDROM_OPEN: // CD-ROM driver functions
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r->d[0] = CDROMOpen(r->a[0], r->a[1]);
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break;
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case OP_CDROM_PRIME:
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r->d[0] = CDROMPrime(r->a[0], r->a[1]);
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break;
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case OP_CDROM_CONTROL:
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r->d[0] = CDROMControl(r->a[0], r->a[1]);
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break;
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case OP_CDROM_STATUS:
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r->d[0] = CDROMStatus(r->a[0], r->a[1]);
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break;
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case OP_AUDIO_DISPATCH: // Audio component functions
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r->d[0] = AudioDispatch(r->a[3], r->a[4]);
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break;
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case OP_SOUNDIN_OPEN: // Sound input driver functions
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r->d[0] = SoundInOpen(r->a[0], r->a[1]);
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break;
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case OP_SOUNDIN_PRIME:
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r->d[0] = SoundInPrime(r->a[0], r->a[1]);
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break;
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case OP_SOUNDIN_CONTROL:
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r->d[0] = SoundInControl(r->a[0], r->a[1]);
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break;
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case OP_SOUNDIN_STATUS:
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r->d[0] = SoundInStatus(r->a[0], r->a[1]);
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break;
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case OP_SOUNDIN_CLOSE:
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r->d[0] = SoundInClose(r->a[0], r->a[1]);
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break;
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case OP_ADBOP: // ADBOp() replacement
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ADBOp(r->d[0], Mac2HostAddr(ReadMacInt32(r->a[0])));
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break;
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case OP_INSTIME: // InsTime() replacement
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r->d[0] = InsTime(r->a[0], r->d[1]);
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break;
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case OP_RMVTIME: // RmvTime() replacement
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r->d[0] = RmvTime(r->a[0]);
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break;
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case OP_PRIMETIME: // PrimeTime() replacement
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r->d[0] = PrimeTime(r->a[0], r->d[0]);
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break;
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case OP_MICROSECONDS: // Microseconds() replacement
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Microseconds(r->a[0], r->d[0]);
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break;
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case OP_ZERO_SCRAP: // ZeroScrap() patch
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ZeroScrap();
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break;
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case OP_PUT_SCRAP: // PutScrap() patch
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PutScrap(ReadMacInt32(r->a[7] + 8), Mac2HostAddr(ReadMacInt32(r->a[7] + 4)), ReadMacInt32(r->a[7] + 12));
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break;
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case OP_GET_SCRAP: // GetScrap() patch
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GetScrap((void **)Mac2HostAddr(ReadMacInt32(r->a[7] + 4)), ReadMacInt32(r->a[7] + 8), ReadMacInt32(r->a[7] + 12));
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break;
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case OP_DEBUG_STR: // DebugStr() shows warning message
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if (PrefsFindBool("nogui")) {
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uint8 *pstr = Mac2HostAddr(ReadMacInt32(r->a[7] + 4));
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char str[256];
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int i;
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for (i=0; i<pstr[0]; i++)
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str[i] = pstr[i+1];
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str[i] = 0;
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WarningAlert(str);
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}
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break;
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case OP_INSTALL_DRIVERS: { // Patch to install our own drivers during startup
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// Install drivers
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InstallDrivers();
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// Patch MakeExecutable()
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MakeExecutableTvec = FindLibSymbol("\023PrivateInterfaceLib", "\016MakeExecutable");
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D(bug("MakeExecutable TVECT at %08x\n", MakeExecutableTvec));
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WriteMacInt32(MakeExecutableTvec, NativeFunction(NATIVE_MAKE_EXECUTABLE));
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#if !EMULATED_PPC
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WriteMacInt32(MakeExecutableTvec + 4, (uint32)TOC);
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#endif
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// Patch DebugStr()
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static const uint8 proc_template[] = {
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M68K_EMUL_OP_DEBUG_STR >> 8, M68K_EMUL_OP_DEBUG_STR & 0xFF,
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0x4e, 0x74, // rtd #4
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0x00, 0x04
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};
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BUILD_SHEEPSHAVER_PROCEDURE(proc);
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WriteMacInt32(0x1dfc, proc);
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break;
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}
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case OP_NAME_REGISTRY: // Patch Name Registry and initialize CallUniversalProc
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r->d[0] = (uint32)-1;
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PatchNameRegistry();
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InitCallUniversalProc();
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break;
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case OP_RESET: // Early in MacOS reset
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D(bug("*** RESET ***\n"));
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tick_inhibit = true;
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CDROMRemount(); // for System 7.x
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TimerReset();
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MacOSUtilReset();
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AudioReset();
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#ifdef USE_SDL_AUDIO
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PlayStartupSound();
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#endif
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// Enable DR emulator (disabled for now)
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if (PrefsFindBool("jit68k") && 0) {
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D(bug("DR activated\n"));
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WriteMacInt32(KernelDataAddr + 0x17a0, 3); // Prepare for DR emulator activation
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WriteMacInt32(KernelDataAddr + 0x17c0, DR_CACHE_BASE);
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WriteMacInt32(KernelDataAddr + 0x17c4, DR_CACHE_SIZE);
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WriteMacInt32(KernelDataAddr + 0x1b04, DR_CACHE_BASE);
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WriteMacInt32(KernelDataAddr + 0x1b00, DR_EMULATOR_BASE);
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memcpy((void *)DR_EMULATOR_BASE, (void *)(ROMBase + 0x370000), DR_EMULATOR_SIZE);
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MakeExecutable(0, DR_EMULATOR_BASE, DR_EMULATOR_SIZE);
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}
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tick_inhibit = false;
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break;
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case OP_IRQ: // Level 1 interrupt
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WriteMacInt16(ReadMacInt32(KernelDataAddr + 0x67c), 0); // Clear interrupt
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r->d[0] = 0;
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if (HasMacStarted()) {
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if (InterruptFlags & INTFLAG_VIA) {
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ClearInterruptFlag(INTFLAG_VIA);
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#if !PRECISE_TIMING
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TimerInterrupt();
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#endif
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ExecuteNative(NATIVE_VIDEO_VBL);
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static int tick_counter = 0;
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if (++tick_counter >= 60) {
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tick_counter = 0;
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SonyInterrupt();
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DiskInterrupt();
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CDROMInterrupt();
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}
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r->d[0] = 1; // Flag: 68k interrupt routine executes VBLTasks etc.
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}
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if (InterruptFlags & INTFLAG_SERIAL) {
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ClearInterruptFlag(INTFLAG_SERIAL);
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SerialInterrupt();
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}
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if (InterruptFlags & INTFLAG_ETHER) {
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ClearInterruptFlag(INTFLAG_ETHER);
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ExecuteNative(NATIVE_ETHER_IRQ);
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}
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if (InterruptFlags & INTFLAG_TIMER) {
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ClearInterruptFlag(INTFLAG_TIMER);
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TimerInterrupt();
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}
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if (InterruptFlags & INTFLAG_AUDIO) {
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ClearInterruptFlag(INTFLAG_AUDIO);
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AudioInterrupt();
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}
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if (InterruptFlags & INTFLAG_ADB) {
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ClearInterruptFlag(INTFLAG_ADB);
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ADBInterrupt();
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}
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} else
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r->d[0] = 1;
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break;
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case OP_SCSI_DISPATCH: { // SCSIDispatch() replacement
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uint32 ret = ReadMacInt32(r->a[7]);
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uint16 sel = ReadMacInt16(r->a[7] + 4);
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r->a[7] += 6;
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// D(bug("SCSIDispatch(%d)\n", sel));
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int stack;
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switch (sel) {
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case 0: // SCSIReset
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WriteMacInt16(r->a[7], SCSIReset());
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stack = 0;
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break;
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case 1: // SCSIGet
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WriteMacInt16(r->a[7], SCSIGet());
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stack = 0;
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break;
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case 2: // SCSISelect
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case 11: // SCSISelAtn
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WriteMacInt16(r->a[7] + 2, SCSISelect(ReadMacInt8(r->a[7] + 1)));
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stack = 2;
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break;
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case 3: // SCSICmd
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WriteMacInt16(r->a[7] + 6, SCSICmd(ReadMacInt16(r->a[7]), Mac2HostAddr(ReadMacInt32(r->a[7] + 2))));
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stack = 6;
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break;
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case 4: // SCSIComplete
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WriteMacInt16(r->a[7] + 12, SCSIComplete(ReadMacInt32(r->a[7]), ReadMacInt32(r->a[7] + 4), ReadMacInt32(r->a[7] + 8)));
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stack = 12;
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break;
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case 5: // SCSIRead
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case 8: // SCSIRBlind
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WriteMacInt16(r->a[7] + 4, SCSIRead(ReadMacInt32(r->a[7])));
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stack = 4;
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break;
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case 6: // SCSIWrite
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case 9: // SCSIWBlind
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WriteMacInt16(r->a[7] + 4, SCSIWrite(ReadMacInt32(r->a[7])));
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stack = 4;
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break;
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case 10: // SCSIStat
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WriteMacInt16(r->a[7], SCSIStat());
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stack = 0;
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break;
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case 12: // SCSIMsgIn
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WriteMacInt16(r->a[7] + 4, 0);
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stack = 4;
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break;
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case 13: // SCSIMsgOut
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WriteMacInt16(r->a[7] + 2, 0);
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stack = 2;
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break;
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case 14: // SCSIMgrBusy
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WriteMacInt16(r->a[7], SCSIMgrBusy());
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stack = 0;
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break;
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default:
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printf("FATAL: SCSIDispatch: illegal selector\n");
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stack = 0;
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//!! SysError(12)
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}
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r->a[0] = ret;
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r->a[7] += stack;
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break;
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}
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case OP_SCSI_ATOMIC: // SCSIAtomic() replacement
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D(bug("SCSIAtomic\n"));
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r->d[0] = (uint32)-7887;
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break;
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case OP_CHECK_SYSV: { // Check we are not using MacOS < 8.1 with a NewWorld ROM
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r->a[1] = r->d[1];
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r->a[0] = ReadMacInt32(r->d[1]);
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uint32 sysv = ReadMacInt16(r->a[0]);
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D(bug("Detected MacOS version %d.%d.%d\n", (sysv >> 8) & 0xf, (sysv >> 4) & 0xf, sysv & 0xf));
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if (ROMType == ROMTYPE_NEWWORLD && sysv < 0x0801)
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r->d[1] = 0;
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break;
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}
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case OP_NTRB_17_PATCH:
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r->a[2] = ReadMacInt32(r->a[7]);
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r->a[7] += 4;
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if (ReadMacInt16(r->a[2] + 6) == 17)
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PatchNativeResourceManager();
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break;
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case OP_NTRB_17_PATCH2:
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r->a[7] += 8;
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PatchNativeResourceManager();
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break;
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case OP_NTRB_17_PATCH3:
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r->a[2] = ReadMacInt32(r->a[7]);
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r->a[7] += 4;
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D(bug("%d %d\n", ReadMacInt16(r->a[2]), ReadMacInt16(r->a[2] + 6)));
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if (ReadMacInt16(r->a[2]) == 11 && ReadMacInt16(r->a[2] + 6) == 17)
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PatchNativeResourceManager();
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break;
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case OP_NTRB_17_PATCH4:
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r->d[0] = ReadMacInt16(r->a[7]);
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r->a[7] += 2;
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D(bug("%d %d\n", ReadMacInt16(r->a[2]), ReadMacInt16(r->a[2] + 6)));
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if (ReadMacInt16(r->a[2]) == 11 && ReadMacInt16(r->a[2] + 6) == 17)
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PatchNativeResourceManager();
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break;
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case OP_CHECKLOAD: { // vCheckLoad() patch
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uint32 type = ReadMacInt32(r->a[7]);
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r->a[7] += 4;
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int16 id = ReadMacInt16(r->a[2]);
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if (r->a[0] == 0)
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break;
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uint32 adr = ReadMacInt32(r->a[0]);
|
|
if (adr == 0)
|
|
break;
|
|
uint16 *p = (uint16 *)Mac2HostAddr(adr);
|
|
uint32 size = ReadMacInt32(adr - 8) & 0xffffff;
|
|
CheckLoad(type, id, p, size);
|
|
break;
|
|
}
|
|
|
|
case 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 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;
|
|
|
|
case OP_IDLE_TIME:
|
|
// Sleep if no events pending
|
|
if (ReadMacInt32(0x14c) == 0)
|
|
idle_wait();
|
|
r->a[0] = ReadMacInt32(0x2b6);
|
|
break;
|
|
|
|
case OP_IDLE_TIME_2:
|
|
// Sleep if no events pending
|
|
if (ReadMacInt32(0x14c) == 0)
|
|
idle_wait();
|
|
r->d[0] = (uint32)-2;
|
|
break;
|
|
|
|
default:
|
|
printf("FATAL: EMUL_OP called with bogus selector %08x\n", selector);
|
|
QuitEmulator();
|
|
break;
|
|
}
|
|
}
|