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/* |
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* main_beos.cpp - Emulation core, BeOS implementation |
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* |
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* SheepShaver (C) 1997-2002 Christian Bauer and Marc Hellwig |
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* SheepShaver (C) 1997-2004 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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#include "macos_util.h" |
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#include "rom_patches.h" |
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#include "user_strings.h" |
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#include "thunks.h" |
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#include "sheep_driver.h" |
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const char RAM_AREA_NAME[] = "Macintosh RAM"; |
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const char ROM_AREA_NAME[] = "Macintosh ROM"; |
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const char DR_CACHE_AREA_NAME[] = "Macintosh DR Cache"; |
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const uint32 ROM_AREA_SIZE = 0x500000; // Size of ROM area |
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const uint32 KERNEL_DATA_BASE = 0x68ffe000; // Address of Kernel Data |
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const uint32 KERNEL_DATA2_BASE = 0x5fffe000;// Alternate address of Kernel Data |
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const uint32 KERNEL_AREA_SIZE = 0x2000; // Size of Kernel Data area |
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const char SHEEP_AREA_NAME[] = "SheepShaver Virtual Stack"; |
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const uint32 SIG_STACK_SIZE = 8192; // Size of signal stack |
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const uint32 MSG_START = 'strt'; // Emulator start message |
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// Emulator Data |
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struct EmulatorData { |
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uint32 v[0x400]; |
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}; |
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// Kernel Data |
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struct KernelData { |
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uint32 v[0x400]; |
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EmulatorData ed; |
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}; |
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// Application object |
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class SheepShaver : public BApplication { |
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public: |
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static void *sig_stack = NULL; // Stack for signal handlers |
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static void *extra_stack = NULL; // Stack for SIGSEGV inside interrupt handler |
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uintptr SheepMem::zero_page = 0; // Address of ro page filled in with zeros |
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uintptr SheepMem::base; // Address of SheepShaver data |
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uintptr SheepMem::top; // Top of SheepShaver data (stack like storage) |
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static area_id SheepMemArea; // SheepShaver data area ID |
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// Prototypes |
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void SheepShaver::StartEmulator(void) |
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{ |
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char str[256]; |
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int16 i16; |
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// Open sheep driver and remap low memory |
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sheep_fd = open("/dev/sheep", 0); |
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} |
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D(bug("Kernel Data 2 area %ld at %p\n", kernel_area2, kernel_data2)); |
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// Create area for SheepShaver data |
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if (!SheepMem::Init()) { |
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sprintf(str, GetString(STR_NO_SHEEP_MEM_AREA_ERR)); |
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ErrorAlert(str); |
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PostMessage(B_QUIT_REQUESTED); |
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return; |
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} |
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// Create area for Mac RAM |
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RAMSize = PrefsFindInt32("ramsize") & 0xfff00000; // Round down to 1MB boundary |
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if (RAMSize < 8*1024*1024) { |
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XPRAMInit(); |
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// Set boot volume |
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drive = PrefsFindInt32("bootdrive"); |
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i16 = PrefsFindInt32("bootdrive"); |
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XPRAM[0x1378] = i16 >> 8; |
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XPRAM[0x1379] = i16 & 0xff; |
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driver = PrefsFindInt32("bootdriver"); |
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i16 = PrefsFindInt32("bootdriver"); |
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XPRAM[0x137a] = i16 >> 8; |
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XPRAM[0x137b] = i16 & 0xff; |
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boot_globs[1] = htonl(RAMSize); |
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boot_globs[2] = htonl((uint32)-1); // End of bank table |
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// Init thunks |
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if (!InitThunks()) { |
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PostMessage(B_QUIT_REQUESTED); |
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return; |
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} |
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// Init drivers |
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SonyInit(); |
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DiskInit(); |
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WriteMacInt32(XLM_PVR, PVR); // Theoretical PVR |
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WriteMacInt32(XLM_BUS_CLOCK, BusClockSpeed); // For DriverServicesLib patch |
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WriteMacInt16(XLM_EXEC_RETURN_OPCODE, M68K_EXEC_RETURN); // For Execute68k() (RTS from the executed 68k code will jump here and end 68k mode) |
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WriteMacInt32(XLM_ZERO_PAGE, SheepMem::ZeroPage()); // Pointer to read-only page with all bits set to 0 |
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#if !EMULATED_PPC |
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WriteMacInt32(XLM_TOC, (uint32)TOC); // TOC pointer of emulator |
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WriteMacInt32(XLM_ETHER_INIT, *(uint32 *)InitStreamModule); // DLPI ethernet driver functions |
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DiskExit(); |
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SonyExit(); |
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// Delete thunks |
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ThunksExit(); |
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// Delete SheepShaver globals |
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SheepMem::Exit(); |
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// Delete DR Cache area |
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if (dr_cache_area >= 0) |
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delete_area(dr_cache_area); |
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/* |
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* Execute PPC code from EMUL_OP routine (real mode switch) |
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*/ |
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void ExecutePPC(void (*func)()) |
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{ |
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RoutineDescriptor desc = BUILD_PPC_ROUTINE_DESCRIPTOR(0, func); |
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M68kRegisters r; |
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Execute68k((uint32)&desc, &r); |
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} |
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/* |
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* Quit emulator (must only be called from main thread) |
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*/ |
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void PatchAfterStartup(void) |
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{ |
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ExecutePPC(VideoInstallAccel); |
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ExecuteNative(NATIVE_VIDEO_INSTALL_ACCEL); |
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InstallExtFS(); |
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} |
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* NVRAM watchdog thread (saves NVRAM every minute) |
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*/ |
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static status_t SheepShaver::nvram_func(void *arg) |
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status_t SheepShaver::nvram_func(void *arg) |
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{ |
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SheepShaver *obj = (SheepShaver *)arg; |
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if (InterruptFlags & INTFLAG_VIA) { |
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ClearInterruptFlag(INTFLAG_VIA); |
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ADBInterrupt(); |
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ExecutePPC(VideoVBL); |
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ExecuteNative(NATIVE_VIDEO_VBL); |
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} |
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} |
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#endif |
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} |
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/* |
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* Helpers to share 32-bit addressable data with MacOS |
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*/ |
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bool SheepMem::Init(void) |
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{ |
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// Delete old area |
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area_id old_sheep_area = find_area(SHEEP_AREA_NAME); |
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if (old_sheep_area > 0) |
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delete_area(old_sheep_area); |
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// Create area for SheepShaver data |
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base = 0x60000000; |
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SheepMemArea = create_area(SHEEP_AREA_NAME, (void **)&base, B_BASE_ADDRESS, size, B_NO_LOCK, B_READ_AREA | B_WRITE_AREA); |
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if (SheepMemArea < 0) |
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return false; |
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// Create read-only area with all bits set to 0 |
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static const uint8 const_zero_page[4096] = {0,}; |
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zero_page = const_zero_page; |
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D(bug("SheepShaver area %ld at %p\n", SheepMemArea, base)); |
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top = base + size; |
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return true; |
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} |
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void SheepMem::Exit(void) |
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{ |
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if (SheepMemArea >= 0) |
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delete_area(SheepMemArea); |
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} |
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/* |
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* Display error alert |
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*/ |
