| 1 |
/*
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| 2 |
* emul_op.cpp - 68k opcodes for ROM patches
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| 3 |
*
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* SheepShaver (C) 1997-2002 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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#define DEBUG 0
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#include "debug.h"
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#if __BEOS__
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#define PRECISE_TIMING 1
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#else
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#define PRECISE_TIMING 0
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#endif
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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_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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#if !EMULATED_PPC
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// Patch MakeExecutable()
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MakeExecutableTvec = (uint32 *)FindLibSymbol("\023PrivateInterfaceLib", "\016MakeExecutable");
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D(bug("MakeExecutable TVECT at %p\n", MakeExecutableTvec));
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#ifdef __BEOS__
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MakeExecutableTvec[0] = ((uint32 *)MakeExecutable)[0];
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#else
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MakeExecutableTvec[0] = (uint32)MakeExecutable;
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#endif
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MakeExecutableTvec[1] = (uint32)TOC;
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#endif
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// Patch DebugStr()
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static const uint16 proc[] = {
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M68K_EMUL_OP_DEBUG_STR,
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0x4e74, // rtd #4
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0x0004
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};
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WriteMacInt32(0x1dfc, (uint32)proc);
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break;
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| 281 |
}
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| 282 |
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| 283 |
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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| 286 |
InitCallUniversalProc();
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| 287 |
break;
|
| 288 |
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| 289 |
case OP_RESET: // Early in MacOS reset
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| 290 |
D(bug("*** RESET ***\n"));
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| 291 |
TimerReset();
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| 292 |
MacOSUtilReset();
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| 293 |
AudioReset();
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| 294 |
#if 0
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| 295 |
printf("DR activated\n");
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| 296 |
WriteMacInt32(KernelDataAddr + 0x17a0, 3); // Prepare for DR emulator activation
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| 297 |
WriteMacInt32(KernelDataAddr + 0x17c0, DR_CACHE_BASE);
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| 298 |
WriteMacInt32(KernelDataAddr + 0x17c4, DR_CACHE_SIZE);
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| 299 |
WriteMacInt32(KernelDataAddr + 0x1b00, DR_CACHE_BASE + 0x10000);
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| 300 |
memcpy((void *)(DR_CACHE_BASE + 0x10000), (void *)(ROM_BASE + 0x370000), 0x10000);
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| 301 |
clear_caches((void *)(DR_CACHE_BASE + 0x10000), 0x10000, B_INVALIDATE_ICACHE | B_FLUSH_DCACHE);
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| 302 |
#endif
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| 303 |
break;
|
| 304 |
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| 305 |
case OP_IRQ: // Level 1 interrupt
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| 306 |
WriteMacInt16(ReadMacInt32(KernelDataAddr + 0x67c), 0); // Clear interrupt
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| 307 |
r->d[0] = 0;
|
| 308 |
if (HasMacStarted()) {
|
| 309 |
if (InterruptFlags & INTFLAG_VIA) {
|
| 310 |
ClearInterruptFlag(INTFLAG_VIA);
|
| 311 |
#if !PRECISE_TIMING
|
| 312 |
TimerInterrupt();
|
| 313 |
#endif
|
| 314 |
ExecutePPC(VideoVBL);
|
| 315 |
|
| 316 |
static int tick_counter = 0;
|
| 317 |
if (++tick_counter >= 60) {
|
| 318 |
tick_counter = 0;
|
| 319 |
SonyInterrupt();
|
| 320 |
DiskInterrupt();
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| 321 |
CDROMInterrupt();
|
| 322 |
}
|
| 323 |
|
| 324 |
r->d[0] = 1; // Flag: 68k interrupt routine executes VBLTasks etc.
|
| 325 |
}
|
| 326 |
if (InterruptFlags & INTFLAG_SERIAL) {
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| 327 |
ClearInterruptFlag(INTFLAG_SERIAL);
|
| 328 |
SerialInterrupt();
|
| 329 |
}
|
| 330 |
if (InterruptFlags & INTFLAG_ETHER) {
|
| 331 |
ClearInterruptFlag(INTFLAG_ETHER);
|
| 332 |
ExecutePPC(EtherIRQ);
|
| 333 |
}
|
| 334 |
if (InterruptFlags & INTFLAG_TIMER) {
|
| 335 |
ClearInterruptFlag(INTFLAG_TIMER);
|
| 336 |
TimerInterrupt();
|
| 337 |
}
|
| 338 |
if (InterruptFlags & INTFLAG_AUDIO) {
|
| 339 |
ClearInterruptFlag(INTFLAG_AUDIO);
|
| 340 |
AudioInterrupt();
|
| 341 |
}
|
| 342 |
if (InterruptFlags & INTFLAG_ADB) {
|
| 343 |
ClearInterruptFlag(INTFLAG_ADB);
|
| 344 |
ADBInterrupt();
|
| 345 |
}
|
| 346 |
} else
|
| 347 |
r->d[0] = 1;
|
| 348 |
break;
|
| 349 |
|
| 350 |
case OP_SCSI_DISPATCH: { // SCSIDispatch() replacement
|
| 351 |
uint32 ret = ReadMacInt32(r->a[7]);
|
| 352 |
uint16 sel = ReadMacInt16(r->a[7] + 4);
|
| 353 |
r->a[7] += 6;
|
| 354 |
// D(bug("SCSIDispatch(%d)\n", sel));
|
| 355 |
int stack;
|
| 356 |
switch (sel) {
|
| 357 |
case 0: // SCSIReset
|
| 358 |
WriteMacInt16(r->a[7], SCSIReset());
|
| 359 |
stack = 0;
|
| 360 |
break;
|
| 361 |
case 1: // SCSIGet
|
| 362 |
WriteMacInt16(r->a[7], SCSIGet());
|
| 363 |
stack = 0;
|
| 364 |
break;
|
| 365 |
case 2: // SCSISelect
|
| 366 |
case 11: // SCSISelAtn
|
| 367 |
WriteMacInt16(r->a[7] + 2, SCSISelect(ReadMacInt8(r->a[7] + 1)));
|
| 368 |
stack = 2;
|
| 369 |
break;
|
| 370 |
case 3: // SCSICmd
|
| 371 |
WriteMacInt16(r->a[7] + 6, SCSICmd(ReadMacInt16(r->a[7]), Mac2HostAddr(ReadMacInt32(r->a[7] + 2))));
|
| 372 |
stack = 6;
|
| 373 |
break;
|
| 374 |
case 4: // SCSIComplete
|
| 375 |
WriteMacInt16(r->a[7] + 12, SCSIComplete(ReadMacInt32(r->a[7]), ReadMacInt32(r->a[7] + 4), ReadMacInt32(r->a[7] + 8)));
|
| 376 |
stack = 12;
|
| 377 |
break;
|
| 378 |
case 5: // SCSIRead
|
| 379 |
case 8: // SCSIRBlind
|
| 380 |
WriteMacInt16(r->a[7] + 4, SCSIRead(ReadMacInt32(r->a[7])));
|
| 381 |
stack = 4;
|
| 382 |
break;
|
| 383 |
case 6: // SCSIWrite
|
| 384 |
case 9: // SCSIWBlind
|
| 385 |
WriteMacInt16(r->a[7] + 4, SCSIWrite(ReadMacInt32(r->a[7])));
|
| 386 |
stack = 4;
|
| 387 |
break;
|
| 388 |
case 10: // SCSIStat
|
| 389 |
WriteMacInt16(r->a[7], SCSIStat());
|
| 390 |
stack = 0;
|
| 391 |
break;
|
| 392 |
case 12: // SCSIMsgIn
|
| 393 |
WriteMacInt16(r->a[7] + 4, 0);
|
| 394 |
stack = 4;
|
| 395 |
break;
|
| 396 |
case 13: // SCSIMsgOut
|
| 397 |
WriteMacInt16(r->a[7] + 2, 0);
|
| 398 |
stack = 2;
|
| 399 |
break;
|
| 400 |
case 14: // SCSIMgrBusy
|
| 401 |
WriteMacInt16(r->a[7], SCSIMgrBusy());
|
| 402 |
stack = 0;
|
| 403 |
break;
|
| 404 |
default:
|
| 405 |
printf("FATAL: SCSIDispatch: illegal selector\n");
|
| 406 |
stack = 0;
|
| 407 |
//!! SysError(12)
|
| 408 |
}
|
| 409 |
r->a[0] = ret;
|
| 410 |
r->a[7] += stack;
|
| 411 |
break;
|
| 412 |
}
|
| 413 |
|
| 414 |
case OP_SCSI_ATOMIC: // SCSIAtomic() replacement
|
| 415 |
D(bug("SCSIAtomic\n"));
|
| 416 |
r->d[0] = (uint32)-7887;
|
| 417 |
break;
|
| 418 |
|
| 419 |
case OP_NTRB_17_PATCH:
|
| 420 |
r->a[2] = ReadMacInt32(r->a[7]);
|
| 421 |
r->a[7] += 4;
|
| 422 |
if (ReadMacInt16(r->a[2] + 6) == 17)
|
| 423 |
PatchNativeResourceManager();
|
| 424 |
break;
|
| 425 |
|
| 426 |
case OP_NTRB_17_PATCH2:
|
| 427 |
r->a[7] += 8;
|
| 428 |
PatchNativeResourceManager();
|
| 429 |
break;
|
| 430 |
|
| 431 |
case OP_NTRB_17_PATCH3:
|
| 432 |
r->a[2] = ReadMacInt32(r->a[7]);
|
| 433 |
r->a[7] += 4;
|
| 434 |
D(bug("%d %d\n", ReadMacInt16(r->a[2]), ReadMacInt16(r->a[2] + 6)));
|
| 435 |
if (ReadMacInt16(r->a[2]) == 11 && ReadMacInt16(r->a[2] + 6) == 17)
|
| 436 |
PatchNativeResourceManager();
|
| 437 |
break;
|
| 438 |
|
| 439 |
case OP_CHECKLOAD: { // vCheckLoad() patch
|
| 440 |
uint32 type = ReadMacInt32(r->a[7]);
|
| 441 |
r->a[7] += 4;
|
| 442 |
int16 id = ReadMacInt16(r->a[2]);
|
| 443 |
if (r->a[0] == 0)
|
| 444 |
break;
|
| 445 |
uint32 adr = ReadMacInt32(r->a[0]);
|
| 446 |
if (adr == 0)
|
| 447 |
break;
|
| 448 |
uint16 *p = (uint16 *)Mac2HostAddr(adr);
|
| 449 |
uint32 size = ReadMacInt32(adr - 8) & 0xffffff;
|
| 450 |
CheckLoad(type, id, p, size);
|
| 451 |
break;
|
| 452 |
}
|
| 453 |
|
| 454 |
case OP_EXTFS_COMM: // External file system routines
|
| 455 |
WriteMacInt16(r->a[7] + 14, ExtFSComm(ReadMacInt16(r->a[7] + 12), ReadMacInt32(r->a[7] + 8), ReadMacInt32(r->a[7] + 4)));
|
| 456 |
break;
|
| 457 |
|
| 458 |
case OP_EXTFS_HFS:
|
| 459 |
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)));
|
| 460 |
break;
|
| 461 |
|
| 462 |
case OP_IDLE_TIME:
|
| 463 |
#if __BEOS__
|
| 464 |
// Sleep if no events pending
|
| 465 |
if (ReadMacInt32(0x14c) == 0) {
|
| 466 |
sleep(16667);
|
| 467 |
}
|
| 468 |
#endif
|
| 469 |
r->a[0] = ReadMacInt32(0x2b6);
|
| 470 |
break;
|
| 471 |
|
| 472 |
default:
|
| 473 |
printf("FATAL: EMUL_OP called with bogus selector %08x\n", selector);
|
| 474 |
QuitEmulator();
|
| 475 |
break;
|
| 476 |
}
|
| 477 |
}
|
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