mirror of
https://github.com/kanjitalk755/macemu.git
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13e7e02786
responsiveness for me.
835 lines
19 KiB
C++
Executable File
835 lines
19 KiB
C++
Executable File
/*
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* main_windows.cpp - Emulation core, Windows implementation
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*
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* SheepShaver (C) 1997-2005 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 <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <SDL.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 "prefs_editor.h"
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#include "cpu_emulation.h"
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#include "emul_op.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 "video.h"
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#include "sys.h"
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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 "vm_alloc.h"
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#include "sigsegv.h"
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#include "util_windows.h"
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#define DEBUG 0
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#include "debug.h"
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#ifdef ENABLE_MON
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#include "mon.h"
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#endif
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// Constants
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const char ROM_FILE_NAME[] = "ROM";
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const char ROM_FILE_NAME2[] = "Mac OS ROM";
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const uintptr RAM_BASE = 0x20000000; // Base address of RAM
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const uint32 SIG_STACK_SIZE = 0x10000; // Size of signal stack
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// Global variables (exported)
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uint32 RAMBase; // Base address of Mac RAM
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uint32 RAMSize; // Size of Mac RAM
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uint32 KernelDataAddr; // Address of Kernel Data
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uint32 BootGlobsAddr; // Address of BootGlobs structure at top of Mac RAM
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uint32 DRCacheAddr; // Address of DR Cache
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uint32 PVR; // Theoretical PVR
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int64 CPUClockSpeed; // Processor clock speed (Hz)
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int64 BusClockSpeed; // Bus clock speed (Hz)
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int64 TimebaseSpeed; // Timebase clock speed (Hz)
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uint8 *RAMBaseHost; // Base address of Mac RAM (host address space)
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uint8 *ROMBaseHost; // Base address of Mac ROM (host address space)
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DWORD win_os; // Windows OS id
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DWORD win_os_major; // Windows OS version major
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// Global variables
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static bool lm_area_mapped = false; // Flag: Low Memory area mmap()ped
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static int kernel_area = -1; // SHM ID of Kernel Data area
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static bool rom_area_mapped = false; // Flag: Mac ROM mmap()ped
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static bool ram_area_mapped = false; // Flag: Mac RAM mmap()ped
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static bool dr_cache_area_mapped = false; // Flag: Mac DR Cache mmap()ped
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static bool dr_emulator_area_mapped = false;// Flag: Mac DR Emulator mmap()ped
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static KernelData *kernel_data; // Pointer to Kernel Data
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static EmulatorData *emulator_data;
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static uint8 last_xpram[XPRAM_SIZE]; // Buffer for monitoring XPRAM changes
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static bool nvram_thread_active = false; // Flag: NVRAM watchdog installed
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static volatile bool nvram_thread_cancel; // Flag: Cancel NVRAM thread
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static HANDLE nvram_thread = NULL; // NVRAM watchdog
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static bool tick_thread_active = false; // Flag: MacOS thread installed
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static volatile bool tick_thread_cancel; // Flag: Cancel 60Hz thread
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static HANDLE tick_thread = NULL; // 60Hz thread
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static HANDLE emul_thread = NULL; // MacOS thread
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static uintptr sig_stack = 0; // Stack for PowerPC interrupt routine
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uint32 SheepMem::page_size; // Size of a native page
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uintptr SheepMem::zero_page = 0; // Address of ro page filled in with zeros
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uintptr SheepMem::base = 0x60000000; // Address of SheepShaver data
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uintptr SheepMem::proc; // Bottom address of SheepShave procedures
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uintptr SheepMem::data; // Top of SheepShaver data (stack like storage)
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// Prototypes
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static bool kernel_data_init(void);
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static void kernel_data_exit(void);
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static void Quit(void);
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static DWORD WINAPI nvram_func(void *arg);
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static DWORD WINAPI tick_func(void *arg);
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static void jump_to_rom(uint32 entry);
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extern void emul_ppc(uint32 start);
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extern void init_emul_ppc(void);
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extern void exit_emul_ppc(void);
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sigsegv_return_t sigsegv_handler(sigsegv_address_t, sigsegv_address_t);
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/*
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* Return signal stack base
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*/
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uintptr SignalStackBase(void)
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{
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return sig_stack + SIG_STACK_SIZE;
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}
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/*
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* Memory management helpers
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*/
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static inline int vm_mac_acquire(uint32 addr, uint32 size)
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{
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return vm_acquire_fixed(Mac2HostAddr(addr), size);
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}
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static inline int vm_mac_release(uint32 addr, uint32 size)
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{
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return vm_release(Mac2HostAddr(addr), size);
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}
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/*
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* Main program
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*/
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static void usage(const char *prg_name)
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{
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printf("Usage: %s [OPTION...]\n", prg_name);
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printf("\nUnix options:\n");
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printf(" --display STRING\n X display to use\n");
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PrefsPrintUsage();
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exit(0);
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}
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int main(int argc, char **argv)
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{
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char str[256];
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int16 i16;
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HANDLE rom_fh;
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const char *rom_path;
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uint32 rom_size;
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DWORD actual;
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uint8 *rom_tmp;
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// Initialize variables
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RAMBase = 0;
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// Print some info
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printf(GetString(STR_ABOUT_TEXT1), VERSION_MAJOR, VERSION_MINOR);
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printf(" %s\n", GetString(STR_ABOUT_TEXT2));
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// Read preferences
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PrefsInit(argc, argv);
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// Parse command line arguments
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for (int i=1; i<argc; i++) {
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if (strcmp(argv[i], "--help") == 0) {
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usage(argv[0]);
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} else if (argv[i][0] == '-') {
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fprintf(stderr, "Unrecognized option '%s'\n", argv[i]);
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usage(argv[0]);
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}
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}
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// Check we are using a Windows NT kernel >= 4.0
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OSVERSIONINFO osvi;
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ZeroMemory(&osvi, sizeof(OSVERSIONINFO));
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osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
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if (!GetVersionEx(&osvi)) {
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ErrorAlert("Could not determine OS type");
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QuitEmulator();
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}
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win_os = osvi.dwPlatformId;
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win_os_major = osvi.dwMajorVersion;
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if (win_os != VER_PLATFORM_WIN32_NT || win_os_major < 4) {
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ErrorAlert(GetString(STR_NO_WIN32_NT_4));
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QuitEmulator();
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}
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// Check that drivers are installed
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if (!check_drivers())
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QuitEmulator();
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// FIXME: default to DIB driver
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if (getenv("SDL_VIDEODRIVER") == NULL)
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putenv("SDL_VIDEODRIVER=windib");
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// Initialize SDL system
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int sdl_flags = 0;
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#ifdef USE_SDL_VIDEO
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sdl_flags |= SDL_INIT_VIDEO;
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#endif
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#ifdef USE_SDL_AUDIO
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sdl_flags |= SDL_INIT_AUDIO;
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#endif
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assert(sdl_flags != 0);
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if (SDL_Init(sdl_flags) == -1) {
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char str[256];
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sprintf(str, "Could not initialize SDL: %s.\n", SDL_GetError());
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ErrorAlert(str);
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goto quit;
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}
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atexit(SDL_Quit);
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#ifdef ENABLE_MON
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// Initialize mon
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mon_init();
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#endif
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// Install SIGSEGV handler for CPU emulator
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if (!sigsegv_install_handler(sigsegv_handler)) {
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sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno));
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ErrorAlert(str);
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goto quit;
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}
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// Initialize VM system
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vm_init();
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// Get system info
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PVR = 0x00040000; // Default: 604
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CPUClockSpeed = 100000000; // Default: 100MHz
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BusClockSpeed = 100000000; // Default: 100MHz
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TimebaseSpeed = 25000000; // Default: 25MHz
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PVR = 0x000c0000; // Default: 7400 (with AltiVec)
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D(bug("PVR: %08x (assumed)\n", PVR));
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// Init system routines
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SysInit();
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// Show preferences editor
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if (!PrefsFindBool("nogui"))
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if (!PrefsEditor())
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goto quit;
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// Create Low Memory area (0x0000..0x3000)
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if (vm_mac_acquire(0, 0x3000) < 0) {
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sprintf(str, GetString(STR_LOW_MEM_MMAP_ERR), strerror(errno));
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ErrorAlert(str);
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goto quit;
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}
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lm_area_mapped = true;
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// Create areas for Kernel Data
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if (!kernel_data_init())
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goto quit;
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kernel_data = (KernelData *)Mac2HostAddr(KERNEL_DATA_BASE);
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emulator_data = &kernel_data->ed;
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KernelDataAddr = KERNEL_DATA_BASE;
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D(bug("Kernel Data at %p (%08x)\n", kernel_data, KERNEL_DATA_BASE));
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D(bug("Emulator Data at %p (%08x)\n", emulator_data, KERNEL_DATA_BASE + offsetof(KernelData, ed)));
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// Create area for DR Cache
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if (vm_mac_acquire(DR_EMULATOR_BASE, DR_EMULATOR_SIZE) < 0) {
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sprintf(str, GetString(STR_DR_EMULATOR_MMAP_ERR), strerror(errno));
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ErrorAlert(str);
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goto quit;
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}
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dr_emulator_area_mapped = true;
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if (vm_mac_acquire(DR_CACHE_BASE, DR_CACHE_SIZE) < 0) {
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sprintf(str, GetString(STR_DR_CACHE_MMAP_ERR), strerror(errno));
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ErrorAlert(str);
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goto quit;
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}
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dr_cache_area_mapped = true;
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DRCacheAddr = (uint32)Mac2HostAddr(DR_CACHE_BASE);
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D(bug("DR Cache at %p (%08x)\n", DRCacheAddr, DR_CACHE_BASE));
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// Create area for SheepShaver data
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if (!SheepMem::Init()) {
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sprintf(str, GetString(STR_SHEEP_MEM_MMAP_ERR), strerror(errno));
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ErrorAlert(str);
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goto quit;
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}
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// Create area for Mac ROM
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if (vm_mac_acquire(ROM_BASE, ROM_AREA_SIZE) < 0) {
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sprintf(str, GetString(STR_ROM_MMAP_ERR), strerror(errno));
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ErrorAlert(str);
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goto quit;
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}
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ROMBaseHost = Mac2HostAddr(ROM_BASE);
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rom_area_mapped = true;
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D(bug("ROM area at %p (%08x)\n", ROMBaseHost, ROM_BASE));
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// Create area for Mac RAM
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RAMSize = PrefsFindInt32("ramsize");
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if (RAMSize < 8*1024*1024) {
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WarningAlert(GetString(STR_SMALL_RAM_WARN));
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RAMSize = 8*1024*1024;
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}
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if (vm_mac_acquire(RAM_BASE, RAMSize) < 0) {
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sprintf(str, GetString(STR_RAM_MMAP_ERR), strerror(errno));
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ErrorAlert(str);
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goto quit;
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}
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RAMBaseHost = Mac2HostAddr(RAM_BASE);
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RAMBase = RAM_BASE;
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ram_area_mapped = true;
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D(bug("RAM area at %p (%08x)\n", RAMBaseHost, RAMBase));
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if (RAMBase > ROM_BASE) {
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ErrorAlert(GetString(STR_RAM_HIGHER_THAN_ROM_ERR));
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goto quit;
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}
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// Load Mac ROM
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rom_path = PrefsFindString("rom");
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rom_fh = CreateFile(rom_path ? rom_path : ROM_FILE_NAME,
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GENERIC_READ, 0, NULL, OPEN_EXISTING,
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FILE_ATTRIBUTE_NORMAL, NULL);
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if (rom_fh == INVALID_HANDLE_VALUE) {
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rom_fh = CreateFile(rom_path ? rom_path : ROM_FILE_NAME2,
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GENERIC_READ, 0, NULL, OPEN_EXISTING,
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FILE_ATTRIBUTE_NORMAL, NULL);
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if (rom_fh == INVALID_HANDLE_VALUE) {
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ErrorAlert(GetString(STR_NO_ROM_FILE_ERR));
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goto quit;
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}
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}
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printf(GetString(STR_READING_ROM_FILE));
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rom_size = GetFileSize(rom_fh, NULL);
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rom_tmp = new uint8[ROM_SIZE];
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ReadFile(rom_fh, (void *)rom_tmp, ROM_SIZE, &actual, NULL);
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CloseHandle(rom_fh);
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// Decode Mac ROM
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if (!DecodeROM(rom_tmp, actual)) {
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if (rom_size != 4*1024*1024) {
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ErrorAlert(GetString(STR_ROM_SIZE_ERR));
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goto quit;
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} else {
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ErrorAlert(GetString(STR_ROM_FILE_READ_ERR));
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goto quit;
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}
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}
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delete[] rom_tmp;
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// Initialize native timers
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timer_init();
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// Initialize everything
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if (!InitAll())
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goto quit;
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D(bug("Initialization complete\n"));
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// Write protect ROM
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vm_protect(ROMBaseHost, ROM_AREA_SIZE, VM_PAGE_READ);
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// Start 60Hz thread
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tick_thread_cancel = false;
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tick_thread_active = ((tick_thread = create_thread(tick_func)) != NULL);
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SetThreadPriority(tick_thread, THREAD_PRIORITY_ABOVE_NORMAL);
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D(bug("Tick thread installed (%ld)\n", tick_thread));
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// Start NVRAM watchdog thread
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memcpy(last_xpram, XPRAM, XPRAM_SIZE);
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nvram_thread_cancel = false;
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nvram_thread_active = ((nvram_thread = create_thread(nvram_func, NULL)) != NULL);
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SetThreadPriority(nvram_thread, THREAD_PRIORITY_BELOW_NORMAL);
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D(bug("NVRAM thread installed (%ld)\n", nvram_thread));
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// Get my thread ID and jump to ROM boot routine
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emul_thread = GetCurrentThread();
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D(bug("Jumping to ROM\n"));
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jump_to_rom(ROM_BASE + 0x310000);
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D(bug("Returned from ROM\n"));
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quit:
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Quit();
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return 0;
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}
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/*
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* Cleanup and quit
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*/
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static void Quit(void)
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{
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// Exit PowerPC emulation
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exit_emul_ppc();
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// Stop 60Hz thread
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if (tick_thread_active) {
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tick_thread_cancel = true;
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wait_thread(tick_thread);
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}
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// Stop NVRAM watchdog thread
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if (nvram_thread_active) {
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nvram_thread_cancel = true;
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wait_thread(nvram_thread);
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}
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// Deinitialize everything
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ExitAll();
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// Delete SheepShaver globals
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SheepMem::Exit();
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// Delete RAM area
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if (ram_area_mapped)
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vm_mac_release(RAM_BASE, RAMSize);
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// Delete ROM area
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if (rom_area_mapped)
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vm_mac_release(ROM_BASE, ROM_AREA_SIZE);
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// Delete DR cache areas
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if (dr_emulator_area_mapped)
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vm_mac_release(DR_EMULATOR_BASE, DR_EMULATOR_SIZE);
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if (dr_cache_area_mapped)
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vm_mac_release(DR_CACHE_BASE, DR_CACHE_SIZE);
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|
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// Delete Kernel Data area
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kernel_data_exit();
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// Delete Low Memory area
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if (lm_area_mapped)
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vm_mac_release(0, 0x3000);
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|
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// Exit system routines
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SysExit();
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|
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// Exit preferences
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PrefsExit();
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#ifdef ENABLE_MON
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// Exit mon
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mon_exit();
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#endif
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exit(0);
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}
|
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|
|
|
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/*
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* Initialize Kernel Data segments
|
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*/
|
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|
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static HANDLE kernel_handle; // Shared memory handle for Kernel Data
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static DWORD allocation_granule; // Minimum size of allocateable are (64K)
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static DWORD kernel_area_size; // Size of Kernel Data area
|
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|
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static bool kernel_data_init(void)
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{
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char str[256];
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SYSTEM_INFO si;
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GetSystemInfo(&si);
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allocation_granule = si.dwAllocationGranularity;
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kernel_area_size = (KERNEL_AREA_SIZE + allocation_granule - 1) & -allocation_granule;
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|
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char rcs[10];
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LPVOID kernel_addr;
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kernel_handle = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, 0, kernel_area_size, NULL);
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if (kernel_handle == NULL) {
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sprintf(rcs, "%d", GetLastError());
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sprintf(str, GetString(STR_KD_SHMGET_ERR), rcs);
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ErrorAlert(str);
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return false;
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}
|
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kernel_addr = (LPVOID)Mac2HostAddr(KERNEL_DATA_BASE & -allocation_granule);
|
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if (MapViewOfFileEx(kernel_handle, FILE_MAP_READ | FILE_MAP_WRITE, 0, 0, kernel_area_size, kernel_addr) != kernel_addr) {
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sprintf(rcs, "%d", GetLastError());
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sprintf(str, GetString(STR_KD_SHMAT_ERR), rcs);
|
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ErrorAlert(str);
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return false;
|
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}
|
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kernel_addr = (LPVOID)Mac2HostAddr(KERNEL_DATA2_BASE & -allocation_granule);
|
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if (MapViewOfFileEx(kernel_handle, FILE_MAP_READ | FILE_MAP_WRITE, 0, 0, kernel_area_size, kernel_addr) != kernel_addr) {
|
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sprintf(rcs, "%d", GetLastError());
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sprintf(str, GetString(STR_KD2_SHMAT_ERR), rcs);
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ErrorAlert(str);
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return false;
|
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}
|
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return true;
|
|
}
|
|
|
|
|
|
/*
|
|
* Deallocate Kernel Data segments
|
|
*/
|
|
|
|
static void kernel_data_exit(void)
|
|
{
|
|
if (kernel_handle) {
|
|
UnmapViewOfFile(Mac2HostAddr(KERNEL_DATA_BASE & -allocation_granule));
|
|
UnmapViewOfFile(Mac2HostAddr(KERNEL_DATA2_BASE & -allocation_granule));
|
|
CloseHandle(kernel_handle);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Jump into Mac ROM, start 680x0 emulator
|
|
*/
|
|
|
|
void jump_to_rom(uint32 entry)
|
|
{
|
|
init_emul_ppc();
|
|
emul_ppc(entry);
|
|
}
|
|
|
|
|
|
/*
|
|
* Quit emulator (cause return from jump_to_rom)
|
|
*/
|
|
|
|
void QuitEmulator(void)
|
|
{
|
|
Quit();
|
|
}
|
|
|
|
|
|
/*
|
|
* Pause/resume emulator
|
|
*/
|
|
|
|
void PauseEmulator(void)
|
|
{
|
|
SuspendThread(emul_thread);
|
|
}
|
|
|
|
void ResumeEmulator(void)
|
|
{
|
|
ResumeThread(emul_thread);
|
|
}
|
|
|
|
|
|
/*
|
|
* Dump 68k registers
|
|
*/
|
|
|
|
void Dump68kRegs(M68kRegisters *r)
|
|
{
|
|
// Display 68k registers
|
|
for (int i=0; i<8; i++) {
|
|
printf("d%d: %08x", i, r->d[i]);
|
|
if (i == 3 || i == 7)
|
|
printf("\n");
|
|
else
|
|
printf(", ");
|
|
}
|
|
for (int i=0; i<8; i++) {
|
|
printf("a%d: %08x", i, r->a[i]);
|
|
if (i == 3 || i == 7)
|
|
printf("\n");
|
|
else
|
|
printf(", ");
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Make code executable
|
|
*/
|
|
|
|
void MakeExecutable(int dummy, uint32 start, uint32 length)
|
|
{
|
|
if ((start >= ROM_BASE) && (start < (ROM_BASE + ROM_SIZE)))
|
|
return;
|
|
FlushCodeCache(start, start + length);
|
|
}
|
|
|
|
|
|
/*
|
|
* NVRAM watchdog thread (saves NVRAM every minute)
|
|
*/
|
|
|
|
static void nvram_watchdog(void)
|
|
{
|
|
if (memcmp(last_xpram, XPRAM, XPRAM_SIZE)) {
|
|
memcpy(last_xpram, XPRAM, XPRAM_SIZE);
|
|
SaveXPRAM();
|
|
}
|
|
}
|
|
|
|
static DWORD nvram_func(void *arg)
|
|
{
|
|
while (!nvram_thread_cancel) {
|
|
for (int i=0; i<60 && !nvram_thread_cancel; i++)
|
|
Delay_usec(999999); // Only wait 1 second so we quit promptly when nvram_thread_cancel becomes true
|
|
nvram_watchdog();
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* 60Hz thread (really 60.15Hz)
|
|
*/
|
|
|
|
static DWORD tick_func(void *arg)
|
|
{
|
|
int tick_counter = 0;
|
|
uint64 start = GetTicks_usec();
|
|
int64 ticks = 0;
|
|
uint64 next = GetTicks_usec();
|
|
|
|
while (!tick_thread_cancel) {
|
|
|
|
// Wait
|
|
next += 16625;
|
|
int64 delay = next - GetTicks_usec();
|
|
if (delay > 0)
|
|
Delay_usec(delay);
|
|
else if (delay < -16625)
|
|
next = GetTicks_usec();
|
|
ticks++;
|
|
|
|
// Pseudo Mac 1Hz interrupt, update local time
|
|
if (++tick_counter > 60) {
|
|
tick_counter = 0;
|
|
WriteMacInt32(0x20c, TimerDateTime());
|
|
}
|
|
|
|
// Trigger 60Hz interrupt
|
|
if (ReadMacInt32(XLM_IRQ_NEST) == 0) {
|
|
SetInterruptFlag(INTFLAG_VIA);
|
|
TriggerInterrupt();
|
|
}
|
|
}
|
|
|
|
uint64 end = GetTicks_usec();
|
|
D(bug("%Ld ticks in %Ld usec = %f ticks/sec\n", ticks, end - start, ticks * 1000000.0 / (end - start)));
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* Mutexes
|
|
*/
|
|
|
|
struct B2_mutex {
|
|
mutex_t m;
|
|
};
|
|
|
|
B2_mutex *B2_create_mutex(void)
|
|
{
|
|
return new B2_mutex;
|
|
}
|
|
|
|
void B2_lock_mutex(B2_mutex *mutex)
|
|
{
|
|
mutex->m.lock();
|
|
}
|
|
|
|
void B2_unlock_mutex(B2_mutex *mutex)
|
|
{
|
|
mutex->m.unlock();
|
|
}
|
|
|
|
void B2_delete_mutex(B2_mutex *mutex)
|
|
{
|
|
delete mutex;
|
|
}
|
|
|
|
|
|
/*
|
|
* Interrupt flags (must be handled atomically!)
|
|
*/
|
|
|
|
volatile uint32 InterruptFlags = 0;
|
|
static mutex_t intflags_mutex;
|
|
|
|
void SetInterruptFlag(uint32 flag)
|
|
{
|
|
intflags_mutex.lock();
|
|
InterruptFlags |= flag;
|
|
intflags_mutex.unlock();
|
|
}
|
|
|
|
void ClearInterruptFlag(uint32 flag)
|
|
{
|
|
intflags_mutex.lock();
|
|
InterruptFlags &= ~flag;
|
|
intflags_mutex.unlock();
|
|
}
|
|
|
|
|
|
/*
|
|
* Disable interrupts
|
|
*/
|
|
|
|
void DisableInterrupt(void)
|
|
{
|
|
WriteMacInt32(XLM_IRQ_NEST, int32(ReadMacInt32(XLM_IRQ_NEST)) + 1);
|
|
}
|
|
|
|
|
|
/*
|
|
* Enable interrupts
|
|
*/
|
|
|
|
void EnableInterrupt(void)
|
|
{
|
|
WriteMacInt32(XLM_IRQ_NEST, int32(ReadMacInt32(XLM_IRQ_NEST)) - 1);
|
|
}
|
|
|
|
|
|
/*
|
|
* Helpers to share 32-bit addressable data with MacOS
|
|
*/
|
|
|
|
bool SheepMem::Init(void)
|
|
{
|
|
// Size of a native page
|
|
page_size = vm_get_page_size();
|
|
|
|
// Allocate SheepShaver globals
|
|
proc = base;
|
|
if (vm_mac_acquire(base, size) < 0)
|
|
return false;
|
|
|
|
// Allocate page with all bits set to 0, right in the middle
|
|
// This is also used to catch undesired overlaps between proc and data areas
|
|
zero_page = proc + (size / 2);
|
|
Mac_memset(zero_page, 0, page_size);
|
|
if (vm_protect(Mac2HostAddr(zero_page), page_size, VM_PAGE_READ) < 0)
|
|
return false;
|
|
|
|
// Allocate alternate stack for PowerPC interrupt routine
|
|
sig_stack = base + size;
|
|
if (vm_mac_acquire(sig_stack, SIG_STACK_SIZE) < 0)
|
|
return false;
|
|
|
|
data = base + size;
|
|
return true;
|
|
}
|
|
|
|
void SheepMem::Exit(void)
|
|
{
|
|
if (data) {
|
|
// Delete SheepShaver globals
|
|
vm_mac_release(base, size);
|
|
|
|
// Delete alternate stack for PowerPC interrupt routine
|
|
vm_mac_release(sig_stack, SIG_STACK_SIZE);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Get the main window handle
|
|
*/
|
|
|
|
#ifdef USE_SDL_VIDEO
|
|
#include <SDL_syswm.h>
|
|
static HWND GetMainWindowHandle(void)
|
|
{
|
|
SDL_SysWMinfo wmInfo;
|
|
wmInfo.version.major = SDL_MAJOR_VERSION;
|
|
wmInfo.version.minor = SDL_MINOR_VERSION;
|
|
wmInfo.version.patch = SDL_PATCHLEVEL;
|
|
return SDL_GetWMInfo(&wmInfo) ? wmInfo.window : NULL;
|
|
}
|
|
#endif
|
|
|
|
|
|
/*
|
|
* Display alert
|
|
*/
|
|
|
|
static void display_alert(int title_id, const char *text, int flags)
|
|
{
|
|
HWND hMainWnd = GetMainWindowHandle();
|
|
MessageBox(hMainWnd, text, GetString(title_id), MB_OK | flags);
|
|
}
|
|
|
|
|
|
/*
|
|
* Display error alert
|
|
*/
|
|
|
|
void ErrorAlert(const char *text)
|
|
{
|
|
if (PrefsFindBool("nogui"))
|
|
return;
|
|
|
|
VideoQuitFullScreen();
|
|
display_alert(STR_ERROR_ALERT_TITLE, text, MB_ICONSTOP);
|
|
}
|
|
|
|
|
|
/*
|
|
* Display warning alert
|
|
*/
|
|
|
|
void WarningAlert(const char *text)
|
|
{
|
|
if (PrefsFindBool("nogui"))
|
|
return;
|
|
|
|
display_alert(STR_WARNING_ALERT_TITLE, text, MB_ICONINFORMATION);
|
|
}
|
|
|
|
|
|
/*
|
|
* Display choice alert
|
|
*/
|
|
|
|
bool ChoiceAlert(const char *text, const char *pos, const char *neg)
|
|
{
|
|
printf(GetString(STR_SHELL_WARNING_PREFIX), text);
|
|
return false; //!!
|
|
}
|