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cebix |
1.1 |
/* |
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* emul_op.cpp - 68k opcodes for ROM patches |
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* |
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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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} |
| 127 |
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| 128 |
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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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| 237 |
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case OP_PUT_SCRAP: // PutScrap() patch |
| 238 |
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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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| 241 |
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case OP_GET_SCRAP: // GetScrap() patch |
| 242 |
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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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| 245 |
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case OP_DEBUG_STR: // DebugStr() shows warning message |
| 246 |
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if (PrefsFindBool("nogui")) { |
| 247 |
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uint8 *pstr = Mac2HostAddr(ReadMacInt32(r->a[7] + 4)); |
| 248 |
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char str[256]; |
| 249 |
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int i; |
| 250 |
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for (i=0; i<pstr[0]; i++) |
| 251 |
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str[i] = pstr[i+1]; |
| 252 |
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str[i] = 0; |
| 253 |
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WarningAlert(str); |
| 254 |
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} |
| 255 |
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break; |
| 256 |
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| 257 |
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case OP_INSTALL_DRIVERS: { // Patch to install our own drivers during startup |
| 258 |
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// Install drivers |
| 259 |
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InstallDrivers(); |
| 260 |
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| 261 |
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#if !EMULATED_PPC |
| 262 |
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// Patch MakeExecutable() |
| 263 |
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MakeExecutableTvec = (uint32 *)FindLibSymbol("\023PrivateInterfaceLib", "\016MakeExecutable"); |
| 264 |
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D(bug("MakeExecutable TVECT at %p\n", MakeExecutableTvec)); |
| 265 |
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#ifdef __BEOS__ |
| 266 |
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MakeExecutableTvec[0] = ((uint32 *)MakeExecutable)[0]; |
| 267 |
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#else |
| 268 |
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MakeExecutableTvec[0] = (uint32)MakeExecutable; |
| 269 |
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#endif |
| 270 |
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MakeExecutableTvec[1] = (uint32)TOC; |
| 271 |
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#endif |
| 272 |
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| 273 |
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// Patch DebugStr() |
| 274 |
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static const uint16 proc[] = { |
| 275 |
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M68K_EMUL_OP_DEBUG_STR, |
| 276 |
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0x4e74, // rtd #4 |
| 277 |
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0x0004 |
| 278 |
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}; |
| 279 |
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WriteMacInt32(0x1dfc, (uint32)proc); |
| 280 |
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break; |
| 281 |
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} |
| 282 |
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| 283 |
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case OP_NAME_REGISTRY: // Patch Name Registry and initialize CallUniversalProc |
| 284 |
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r->d[0] = (uint32)-1; |
| 285 |
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PatchNameRegistry(); |
| 286 |
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InitCallUniversalProc(); |
| 287 |
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break; |
| 288 |
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| 289 |
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case OP_RESET: // Early in MacOS reset |
| 290 |
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D(bug("*** RESET ***\n")); |
| 291 |
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TimerReset(); |
| 292 |
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MacOSUtilReset(); |
| 293 |
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AudioReset(); |
| 294 |
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#if 0 |
| 295 |
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printf("DR activated\n"); |
| 296 |
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WriteMacInt32(KernelDataAddr + 0x17a0, 3); // Prepare for DR emulator activation |
| 297 |
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WriteMacInt32(KernelDataAddr + 0x17c0, DR_CACHE_BASE); |
| 298 |
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WriteMacInt32(KernelDataAddr + 0x17c4, DR_CACHE_SIZE); |
| 299 |
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WriteMacInt32(KernelDataAddr + 0x1b00, DR_CACHE_BASE + 0x10000); |
| 300 |
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memcpy((void *)(DR_CACHE_BASE + 0x10000), (void *)(ROM_BASE + 0x370000), 0x10000); |
| 301 |
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clear_caches((void *)(DR_CACHE_BASE + 0x10000), 0x10000, B_INVALIDATE_ICACHE | B_FLUSH_DCACHE); |
| 302 |
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#endif |
| 303 |
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break; |
| 304 |
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| 305 |
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case OP_IRQ: // Level 1 interrupt |
| 306 |
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WriteMacInt16(ReadMacInt32(KernelDataAddr + 0x67c), 0); // Clear interrupt |
| 307 |
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r->d[0] = 0; |
| 308 |
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if (HasMacStarted()) { |
| 309 |
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if (InterruptFlags & INTFLAG_VIA) { |
| 310 |
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ClearInterruptFlag(INTFLAG_VIA); |
| 311 |
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#if !PRECISE_TIMING |
| 312 |
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TimerInterrupt(); |
| 313 |
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#endif |
| 314 |
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ExecutePPC(VideoVBL); |
| 315 |
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| 316 |
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static int tick_counter = 0; |
| 317 |
|
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if (++tick_counter >= 60) { |
| 318 |
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tick_counter = 0; |
| 319 |
|
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SonyInterrupt(); |
| 320 |
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DiskInterrupt(); |
| 321 |
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CDROMInterrupt(); |
| 322 |
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} |
| 323 |
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| 324 |
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r->d[0] = 1; // Flag: 68k interrupt routine executes VBLTasks etc. |
| 325 |
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} |
| 326 |
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if (InterruptFlags & INTFLAG_SERIAL) { |
| 327 |
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ClearInterruptFlag(INTFLAG_SERIAL); |
| 328 |
|
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SerialInterrupt(); |
| 329 |
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} |
| 330 |
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if (InterruptFlags & INTFLAG_ETHER) { |
| 331 |
|
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ClearInterruptFlag(INTFLAG_ETHER); |
| 332 |
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ExecutePPC(EtherIRQ); |
| 333 |
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} |
| 334 |
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if (InterruptFlags & INTFLAG_TIMER) { |
| 335 |
|
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ClearInterruptFlag(INTFLAG_TIMER); |
| 336 |
|
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TimerInterrupt(); |
| 337 |
|
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} |
| 338 |
|
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if (InterruptFlags & INTFLAG_AUDIO) { |
| 339 |
|
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ClearInterruptFlag(INTFLAG_AUDIO); |
| 340 |
|
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AudioInterrupt(); |
| 341 |
|
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} |
| 342 |
|
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if (InterruptFlags & INTFLAG_ADB) { |
| 343 |
|
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ClearInterruptFlag(INTFLAG_ADB); |
| 344 |
|
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ADBInterrupt(); |
| 345 |
|
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} |
| 346 |
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} else |
| 347 |
|
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r->d[0] = 1; |
| 348 |
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break; |
| 349 |
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| 350 |
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case OP_SCSI_DISPATCH: { // SCSIDispatch() replacement |
| 351 |
|
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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 |
|
|
} |
