1 |
/* |
2 |
* main_beos.cpp - Startup code for BeOS |
3 |
* |
4 |
* Basilisk II (C) 1997-2008 Christian Bauer |
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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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|
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#include <AppKit.h> |
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#include <InterfaceKit.h> |
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#include <KernelKit.h> |
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#include <StorageKit.h> |
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|
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#include <unistd.h> |
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#include <fcntl.h> |
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#include <signal.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <time.h> |
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|
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#include "sysdeps.h" |
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#include "cpu_emulation.h" |
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#include "xpram.h" |
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#include "timer.h" |
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#include "video.h" |
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#include "rom_patches.h" |
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#include "prefs.h" |
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#include "prefs_editor.h" |
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#include "sys.h" |
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#include "user_strings.h" |
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#include "version.h" |
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#include "main.h" |
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|
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#include "sheep_driver.h" |
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|
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#define DEBUG 0 |
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#include "debug.h" |
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|
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|
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// Constants |
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const char APP_SIGNATURE[] = "application/x-vnd.cebix-BasiliskII"; |
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const char ROM_FILE_NAME[] = "ROM"; |
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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 uint32 MSG_START = 'strt'; // Emulator start message |
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const uint32 ROM_AREA_SIZE = 0x500000; // Enough to hold PowerMac ROM (for powerrom_cpu) |
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|
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// Prototypes |
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#if __POWERPC__ |
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static void sigsegv_handler(vregs *r); |
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#endif |
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|
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|
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// Application object |
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class BasiliskII : public BApplication { |
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public: |
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BasiliskII() : BApplication(APP_SIGNATURE) |
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{ |
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// Find application directory and cwd to it |
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app_info the_info; |
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GetAppInfo(&the_info); |
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BEntry the_file(&the_info.ref); |
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BEntry the_dir; |
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the_file.GetParent(&the_dir); |
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BPath the_path; |
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the_dir.GetPath(&the_path); |
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chdir(the_path.Path()); |
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|
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// Initialize other variables |
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rom_area = ram_area = -1; |
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xpram_thread = tick_thread = -1; |
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xpram_thread_active = true; |
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tick_thread_active = true; |
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AllowQuitting = true; |
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} |
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virtual void ReadyToRun(void); |
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virtual void MessageReceived(BMessage *msg); |
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void StartEmulator(void); |
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virtual bool QuitRequested(void); |
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virtual void Quit(void); |
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|
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thread_id xpram_thread; // XPRAM watchdog |
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thread_id tick_thread; // 60Hz thread |
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|
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volatile bool xpram_thread_active; // Flag for quitting the XPRAM thread |
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volatile bool tick_thread_active; // Flag for quitting the 60Hz thread |
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|
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bool AllowQuitting; // Flag: Alt-Q quitting allowed |
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|
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private: |
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static status_t emul_func(void *arg); |
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static status_t tick_func(void *arg); |
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static status_t xpram_func(void *arg); |
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static void sigsegv_invoc(int sig, void *arg, vregs *r); |
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|
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void init_rom(void); |
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void load_rom(void); |
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|
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area_id rom_area; // ROM area ID |
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area_id ram_area; // RAM area ID |
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|
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struct sigaction sigsegv_action; // Data access exception signal (of emulator thread) |
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|
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// Exceptions |
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class area_error {}; |
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class file_open_error {}; |
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class file_read_error {}; |
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class rom_size_error {}; |
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}; |
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|
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static BasiliskII *the_app; |
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|
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|
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// CPU and FPU type, addressing mode |
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int CPUType; |
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bool CPUIs68060; |
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int FPUType; |
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bool TwentyFourBitAddressing; |
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|
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|
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// Global variables for PowerROM CPU |
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thread_id emul_thread = -1; // Emulator thread |
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|
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#if __POWERPC__ |
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int sheep_fd = -1; // fd of sheep driver |
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#endif |
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|
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|
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/* |
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* Create application object and start it |
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*/ |
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|
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int main(int argc, char **argv) |
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{ |
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the_app = new BasiliskII(); |
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the_app->Run(); |
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delete the_app; |
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return 0; |
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} |
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|
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|
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/* |
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* Run application |
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*/ |
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|
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void BasiliskII::ReadyToRun(void) |
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{ |
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// Initialize variables |
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RAMBaseHost = NULL; |
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ROMBaseHost = NULL; |
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srand(real_time_clock()); |
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tzset(); |
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|
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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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|
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// Delete old areas |
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area_id old_ram_area = find_area(RAM_AREA_NAME); |
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if (old_ram_area > 0) |
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delete_area(old_ram_area); |
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area_id old_rom_area = find_area(ROM_AREA_NAME); |
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if (old_rom_area > 0) |
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delete_area(old_rom_area); |
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|
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// Read preferences |
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int argc = 0; |
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char **argv = NULL; |
181 |
PrefsInit(argc, argv); |
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|
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// Init system routines |
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SysInit(); |
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|
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// Show preferences editor (or start emulator directly) |
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if (!PrefsFindBool("nogui")) |
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PrefsEditor(); |
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else |
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PostMessage(MSG_START); |
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} |
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|
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|
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/* |
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* Message received |
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*/ |
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|
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void BasiliskII::MessageReceived(BMessage *msg) |
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{ |
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switch (msg->what) { |
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case MSG_START: |
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StartEmulator(); |
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break; |
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default: |
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BApplication::MessageReceived(msg); |
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} |
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} |
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|
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|
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/* |
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* Start emulator |
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*/ |
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|
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void BasiliskII::StartEmulator(void) |
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{ |
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char str[256]; |
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|
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#if REAL_ADDRESSING |
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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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if (sheep_fd < 0) { |
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sprintf(str, GetString(STR_NO_SHEEP_DRIVER_ERR), strerror(sheep_fd), sheep_fd); |
223 |
ErrorAlert(str); |
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PostMessage(B_QUIT_REQUESTED); |
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return; |
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} |
227 |
status_t res = ioctl(sheep_fd, SHEEP_UP); |
228 |
if (res < 0) { |
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sprintf(str, GetString(STR_SHEEP_UP_ERR), strerror(res), res); |
230 |
ErrorAlert(str); |
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PostMessage(B_QUIT_REQUESTED); |
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return; |
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} |
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#endif |
235 |
|
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// Create area for Mac RAM |
237 |
RAMSize = PrefsFindInt32("ramsize") & 0xfff00000; // Round down to 1MB boundary |
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if (RAMSize < 1024*1024) { |
239 |
WarningAlert(GetString(STR_SMALL_RAM_WARN)); |
240 |
RAMSize = 1024*1024; |
241 |
} |
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|
243 |
RAMBaseHost = (uint8 *)0x10000000; |
244 |
ram_area = create_area(RAM_AREA_NAME, (void **)&RAMBaseHost, B_BASE_ADDRESS, RAMSize, B_NO_LOCK, B_READ_AREA | B_WRITE_AREA); |
245 |
if (ram_area < 0) { |
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ErrorAlert(STR_NO_RAM_AREA_ERR); |
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PostMessage(B_QUIT_REQUESTED); |
248 |
return; |
249 |
} |
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D(bug("RAM area %ld at %p\n", ram_area, RAMBaseHost)); |
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|
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// Create area and load Mac ROM |
253 |
try { |
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init_rom(); |
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} catch (area_error) { |
256 |
ErrorAlert(STR_NO_ROM_AREA_ERR); |
257 |
PostMessage(B_QUIT_REQUESTED); |
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return; |
259 |
} catch (file_open_error) { |
260 |
ErrorAlert(STR_NO_ROM_FILE_ERR); |
261 |
PostMessage(B_QUIT_REQUESTED); |
262 |
return; |
263 |
} catch (file_read_error) { |
264 |
ErrorAlert(STR_ROM_FILE_READ_ERR); |
265 |
PostMessage(B_QUIT_REQUESTED); |
266 |
return; |
267 |
} catch (rom_size_error) { |
268 |
ErrorAlert(STR_ROM_SIZE_ERR); |
269 |
PostMessage(B_QUIT_REQUESTED); |
270 |
return; |
271 |
} |
272 |
|
273 |
// Initialize everything |
274 |
if (!InitAll(NULL)) { |
275 |
PostMessage(B_QUIT_REQUESTED); |
276 |
return; |
277 |
} |
278 |
|
279 |
// Write protect ROM |
280 |
set_area_protection(rom_area, B_READ_AREA); |
281 |
|
282 |
// Disallow quitting with Alt-Q from now on |
283 |
AllowQuitting = false; |
284 |
|
285 |
// Start XPRAM watchdog thread |
286 |
xpram_thread = spawn_thread(xpram_func, "XPRAM Watchdog", B_LOW_PRIORITY, this); |
287 |
resume_thread(xpram_thread); |
288 |
|
289 |
// Start 60Hz interrupt |
290 |
tick_thread = spawn_thread(tick_func, "60Hz", B_REAL_TIME_PRIORITY, this); |
291 |
resume_thread(tick_thread); |
292 |
|
293 |
// Start emulator thread |
294 |
emul_thread = spawn_thread(emul_func, "MacOS", B_NORMAL_PRIORITY, this); |
295 |
resume_thread(emul_thread); |
296 |
} |
297 |
|
298 |
|
299 |
/* |
300 |
* Quit emulator |
301 |
*/ |
302 |
|
303 |
void QuitEmulator(void) |
304 |
{ |
305 |
the_app->AllowQuitting = true; |
306 |
be_app->PostMessage(B_QUIT_REQUESTED); |
307 |
exit_thread(0); |
308 |
} |
309 |
|
310 |
bool BasiliskII::QuitRequested(void) |
311 |
{ |
312 |
if (AllowQuitting) |
313 |
return BApplication::QuitRequested(); |
314 |
else |
315 |
return false; |
316 |
} |
317 |
|
318 |
void BasiliskII::Quit(void) |
319 |
{ |
320 |
status_t l; |
321 |
|
322 |
// Stop 60Hz interrupt |
323 |
if (tick_thread > 0) { |
324 |
tick_thread_active = false; |
325 |
wait_for_thread(tick_thread, &l); |
326 |
} |
327 |
|
328 |
// Wait for emulator thread to finish |
329 |
if (emul_thread > 0) |
330 |
wait_for_thread(emul_thread, &l); |
331 |
|
332 |
// Exit 680x0 emulation |
333 |
Exit680x0(); |
334 |
|
335 |
// Stop XPRAM watchdog thread |
336 |
if (xpram_thread > 0) { |
337 |
xpram_thread_active = false; |
338 |
suspend_thread(xpram_thread); // Wake thread up from snooze() |
339 |
snooze(1000); |
340 |
resume_thread(xpram_thread); |
341 |
wait_for_thread(xpram_thread, &l); |
342 |
} |
343 |
|
344 |
// Deinitialize everything |
345 |
ExitAll(); |
346 |
|
347 |
// Delete ROM area |
348 |
if (rom_area >= 0) |
349 |
delete_area(rom_area); |
350 |
|
351 |
// Delete RAM area |
352 |
if (ram_area >= 0) |
353 |
delete_area(ram_area); |
354 |
|
355 |
#if REAL_ADDRESSING |
356 |
// Unmap low memory and close memory mess driver |
357 |
if (sheep_fd >= 0) { |
358 |
ioctl(sheep_fd, SHEEP_DOWN); |
359 |
close(sheep_fd); |
360 |
} |
361 |
#endif |
362 |
|
363 |
// Exit system routines |
364 |
SysExit(); |
365 |
|
366 |
// Exit preferences |
367 |
PrefsExit(); |
368 |
|
369 |
BApplication::Quit(); |
370 |
} |
371 |
|
372 |
|
373 |
/* |
374 |
* Create area for ROM (sets rom_area) and load ROM file |
375 |
* |
376 |
* area_error : Cannot create area |
377 |
* file_open_error: Cannot open ROM file |
378 |
* file_read_error: Cannot read ROM file |
379 |
*/ |
380 |
|
381 |
void BasiliskII::init_rom(void) |
382 |
{ |
383 |
// Create area for ROM |
384 |
ROMBaseHost = (uint8 *)0x40800000; |
385 |
rom_area = create_area(ROM_AREA_NAME, (void **)&ROMBaseHost, B_BASE_ADDRESS, ROM_AREA_SIZE, B_NO_LOCK, B_READ_AREA | B_WRITE_AREA); |
386 |
if (rom_area < 0) |
387 |
throw area_error(); |
388 |
D(bug("ROM area %ld at %p\n", rom_area, ROMBaseHost)); |
389 |
|
390 |
// Load ROM |
391 |
load_rom(); |
392 |
} |
393 |
|
394 |
|
395 |
/* |
396 |
* Load ROM file |
397 |
* |
398 |
* file_open_error: Cannot open ROM file |
399 |
* file_read_error: Cannot read ROM file |
400 |
*/ |
401 |
|
402 |
void BasiliskII::load_rom(void) |
403 |
{ |
404 |
// Get rom file path from preferences |
405 |
const char *rom_path = PrefsFindString("rom"); |
406 |
|
407 |
// Try to open ROM file |
408 |
BFile file(rom_path ? rom_path : ROM_FILE_NAME, B_READ_ONLY); |
409 |
if (file.InitCheck() != B_NO_ERROR) |
410 |
throw file_open_error(); |
411 |
|
412 |
printf(GetString(STR_READING_ROM_FILE)); |
413 |
|
414 |
// Is the ROM size correct? |
415 |
off_t rom_size = 0; |
416 |
file.GetSize(&rom_size); |
417 |
if (rom_size != 64*1024 && rom_size != 128*1024 && rom_size != 256*1024 && rom_size != 512*1024 && rom_size != 1024*1024) |
418 |
throw rom_size_error(); |
419 |
|
420 |
uint8 *rom = new uint8[rom_size]; // Reading directly into the area doesn't work |
421 |
ssize_t actual = file.Read((void *)rom, rom_size); |
422 |
if (actual == rom_size) |
423 |
memcpy(ROMBaseHost, rom, rom_size); |
424 |
delete[] rom; |
425 |
if (actual != rom_size) |
426 |
throw file_read_error(); |
427 |
ROMSize = rom_size; |
428 |
} |
429 |
|
430 |
|
431 |
/* |
432 |
* Emulator thread function |
433 |
*/ |
434 |
|
435 |
status_t BasiliskII::emul_func(void *arg) |
436 |
{ |
437 |
BasiliskII *obj = (BasiliskII *)arg; |
438 |
|
439 |
#if __POWERPC__ |
440 |
// Install data access signal handler |
441 |
sigemptyset(&obj->sigsegv_action.sa_mask); |
442 |
obj->sigsegv_action.sa_handler = (__signal_func_ptr)(obj->sigsegv_invoc); |
443 |
obj->sigsegv_action.sa_flags = 0; |
444 |
obj->sigsegv_action.sa_userdata = arg; |
445 |
sigaction(SIGSEGV, &obj->sigsegv_action, NULL); |
446 |
#endif |
447 |
|
448 |
// Exceptions will send signals |
449 |
disable_debugger(true); |
450 |
|
451 |
// Start 68k and jump to ROM boot routine |
452 |
Start680x0(); |
453 |
|
454 |
// Quit program |
455 |
obj->AllowQuitting = true; |
456 |
be_app->PostMessage(B_QUIT_REQUESTED); |
457 |
return 0; |
458 |
} |
459 |
|
460 |
|
461 |
/* |
462 |
* Code was patched, flush caches if neccessary (i.e. when using a real 680x0 |
463 |
* or a dynamically recompiling emulator) |
464 |
*/ |
465 |
|
466 |
void FlushCodeCache(void *start, uint32 size) |
467 |
{ |
468 |
} |
469 |
|
470 |
|
471 |
/* |
472 |
* Mutexes |
473 |
*/ |
474 |
|
475 |
struct B2_mutex { |
476 |
int dummy; //!! |
477 |
}; |
478 |
|
479 |
B2_mutex *B2_create_mutex(void) |
480 |
{ |
481 |
return new B2_mutex; |
482 |
} |
483 |
|
484 |
void B2_lock_mutex(B2_mutex *mutex) |
485 |
{ |
486 |
} |
487 |
|
488 |
void B2_unlock_mutex(B2_mutex *mutex) |
489 |
{ |
490 |
} |
491 |
|
492 |
void B2_delete_mutex(B2_mutex *mutex) |
493 |
{ |
494 |
delete mutex; |
495 |
} |
496 |
|
497 |
|
498 |
/* |
499 |
* Interrupt flags (must be handled atomically!) |
500 |
*/ |
501 |
|
502 |
uint32 InterruptFlags = 0; |
503 |
|
504 |
void SetInterruptFlag(uint32 flag) |
505 |
{ |
506 |
atomic_or((int32 *)&InterruptFlags, flag); |
507 |
} |
508 |
|
509 |
void ClearInterruptFlag(uint32 flag) |
510 |
{ |
511 |
atomic_and((int32 *)&InterruptFlags, ~flag); |
512 |
} |
513 |
|
514 |
|
515 |
/* |
516 |
* 60Hz thread (really 60.15Hz) |
517 |
*/ |
518 |
|
519 |
status_t BasiliskII::tick_func(void *arg) |
520 |
{ |
521 |
BasiliskII *obj = (BasiliskII *)arg; |
522 |
int tick_counter = 0; |
523 |
bigtime_t current = system_time(); |
524 |
|
525 |
while (obj->tick_thread_active) { |
526 |
|
527 |
// Wait |
528 |
current += 16625; |
529 |
snooze_until(current, B_SYSTEM_TIMEBASE); |
530 |
|
531 |
// Pseudo Mac 1Hz interrupt, update local time |
532 |
if (++tick_counter > 60) { |
533 |
tick_counter = 0; |
534 |
WriteMacInt32(0x20c, TimerDateTime()); |
535 |
SetInterruptFlag(INTFLAG_1HZ); |
536 |
TriggerInterrupt(); |
537 |
} |
538 |
|
539 |
// Trigger 60Hz interrupt |
540 |
SetInterruptFlag(INTFLAG_60HZ); |
541 |
TriggerInterrupt(); |
542 |
} |
543 |
return 0; |
544 |
} |
545 |
|
546 |
|
547 |
/* |
548 |
* XPRAM watchdog thread (saves XPRAM every minute) |
549 |
*/ |
550 |
|
551 |
status_t BasiliskII::xpram_func(void *arg) |
552 |
{ |
553 |
uint8 last_xpram[XPRAM_SIZE]; |
554 |
memcpy(last_xpram, XPRAM, XPRAM_SIZE); |
555 |
|
556 |
while (((BasiliskII *)arg)->xpram_thread_active) { |
557 |
snooze(60*1000000); |
558 |
if (memcmp(last_xpram, XPRAM, XPRAM_SIZE)) { |
559 |
memcpy(last_xpram, XPRAM, XPRAM_SIZE); |
560 |
SaveXPRAM(); |
561 |
} |
562 |
} |
563 |
return 0; |
564 |
} |
565 |
|
566 |
|
567 |
/* |
568 |
* Display error alert |
569 |
*/ |
570 |
|
571 |
void ErrorAlert(const char *text) |
572 |
{ |
573 |
if (PrefsFindBool("nogui")) { |
574 |
printf(GetString(STR_SHELL_ERROR_PREFIX), text); |
575 |
return; |
576 |
} |
577 |
VideoQuitFullScreen(); |
578 |
char str[256]; |
579 |
sprintf(str, GetString(STR_GUI_ERROR_PREFIX), text); |
580 |
BAlert *alert = new BAlert(GetString(STR_ERROR_ALERT_TITLE), str, GetString(STR_QUIT_BUTTON), NULL, NULL, B_WIDTH_AS_USUAL, B_STOP_ALERT); |
581 |
alert->Go(); |
582 |
} |
583 |
|
584 |
|
585 |
/* |
586 |
* Display warning alert |
587 |
*/ |
588 |
|
589 |
void WarningAlert(const char *text) |
590 |
{ |
591 |
if (PrefsFindBool("nogui")) { |
592 |
printf(GetString(STR_SHELL_WARNING_PREFIX), text); |
593 |
return; |
594 |
} |
595 |
char str[256]; |
596 |
sprintf(str, GetString(STR_GUI_WARNING_PREFIX), text); |
597 |
BAlert *alert = new BAlert(GetString(STR_WARNING_ALERT_TITLE), str, GetString(STR_OK_BUTTON), NULL, NULL, B_WIDTH_AS_USUAL, B_INFO_ALERT); |
598 |
alert->Go(); |
599 |
} |
600 |
|
601 |
|
602 |
/* |
603 |
* Display choice alert |
604 |
*/ |
605 |
|
606 |
bool ChoiceAlert(const char *text, const char *pos, const char *neg) |
607 |
{ |
608 |
char str[256]; |
609 |
sprintf(str, GetString(STR_GUI_WARNING_PREFIX), text); |
610 |
BAlert *alert = new BAlert(GetString(STR_WARNING_ALERT_TITLE), str, pos, neg, NULL, B_WIDTH_AS_USUAL, B_INFO_ALERT); |
611 |
return alert->Go() == 0; |
612 |
} |
613 |
|
614 |
|
615 |
/* |
616 |
* SEGV handler |
617 |
*/ |
618 |
|
619 |
#if __POWERPC__ |
620 |
static uint32 segv_r[32]; |
621 |
|
622 |
asm void BasiliskII::sigsegv_invoc(register int sig, register void *arg, register vregs *r) |
623 |
{ |
624 |
mflr r0 |
625 |
stw r0,8(r1) |
626 |
stwu r1,-56(r1) |
627 |
|
628 |
lwz r3,segv_r(r2) |
629 |
stmw r13,13*4(r3) |
630 |
|
631 |
mr r3,r5 |
632 |
bl sigsegv_handler |
633 |
|
634 |
lwz r3,segv_r(r2) |
635 |
lmw r13,13*4(r3) |
636 |
|
637 |
lwz r0,56+8(r1) |
638 |
mtlr r0 |
639 |
addi r1,r1,56 |
640 |
blr |
641 |
} |
642 |
|
643 |
static void sigsegv_handler(vregs *r) |
644 |
{ |
645 |
// Fetch volatile registers |
646 |
segv_r[0] = r->r0; |
647 |
segv_r[1] = r->r1; |
648 |
segv_r[2] = r->r2; |
649 |
segv_r[3] = r->r3; |
650 |
segv_r[4] = r->r4; |
651 |
segv_r[5] = r->r5; |
652 |
segv_r[6] = r->r6; |
653 |
segv_r[7] = r->r7; |
654 |
segv_r[8] = r->r8; |
655 |
segv_r[9] = r->r9; |
656 |
segv_r[10] = r->r10; |
657 |
segv_r[11] = r->r11; |
658 |
segv_r[12] = r->r12; |
659 |
|
660 |
// Get opcode and divide into fields |
661 |
uint32 opcode = *(uint32 *)r->pc; |
662 |
uint32 primop = opcode >> 26; |
663 |
uint32 exop = (opcode >> 1) & 0x3ff; |
664 |
uint32 ra = (opcode >> 16) & 0x1f; |
665 |
uint32 rb = (opcode >> 11) & 0x1f; |
666 |
uint32 rd = (opcode >> 21) & 0x1f; |
667 |
uint32 imm = opcode & 0xffff; |
668 |
|
669 |
// Analyze opcode |
670 |
enum { |
671 |
TYPE_UNKNOWN, |
672 |
TYPE_LOAD, |
673 |
TYPE_STORE |
674 |
} transfer_type = TYPE_UNKNOWN; |
675 |
enum { |
676 |
SIZE_UNKNOWN, |
677 |
SIZE_BYTE, |
678 |
SIZE_HALFWORD, |
679 |
SIZE_WORD |
680 |
} transfer_size = SIZE_UNKNOWN; |
681 |
enum { |
682 |
MODE_UNKNOWN, |
683 |
MODE_NORM, |
684 |
MODE_U, |
685 |
MODE_X, |
686 |
MODE_UX |
687 |
} addr_mode = MODE_UNKNOWN; |
688 |
switch (primop) { |
689 |
case 31: |
690 |
switch (exop) { |
691 |
case 23: // lwzx |
692 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_WORD; addr_mode = MODE_X; break; |
693 |
case 55: // lwzux |
694 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_WORD; addr_mode = MODE_UX; break; |
695 |
case 87: // lbzx |
696 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_BYTE; addr_mode = MODE_X; break; |
697 |
case 119: // lbzux |
698 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_BYTE; addr_mode = MODE_UX; break; |
699 |
case 151: // stwx |
700 |
transfer_type = TYPE_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_X; break; |
701 |
case 183: // stwux |
702 |
transfer_type = TYPE_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_UX; break; |
703 |
case 215: // stbx |
704 |
transfer_type = TYPE_STORE; transfer_size = SIZE_BYTE; addr_mode = MODE_X; break; |
705 |
case 247: // stbux |
706 |
transfer_type = TYPE_STORE; transfer_size = SIZE_BYTE; addr_mode = MODE_UX; break; |
707 |
case 279: // lhzx |
708 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_X; break; |
709 |
case 311: // lhzux |
710 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_UX; break; |
711 |
case 343: // lhax |
712 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_X; break; |
713 |
case 375: // lhaux |
714 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_UX; break; |
715 |
case 407: // sthx |
716 |
transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_X; break; |
717 |
case 439: // sthux |
718 |
transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_UX; break; |
719 |
} |
720 |
break; |
721 |
|
722 |
case 32: // lwz |
723 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_WORD; addr_mode = MODE_NORM; break; |
724 |
case 33: // lwzu |
725 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_WORD; addr_mode = MODE_U; break; |
726 |
case 34: // lbz |
727 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_BYTE; addr_mode = MODE_NORM; break; |
728 |
case 35: // lbzu |
729 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_BYTE; addr_mode = MODE_U; break; |
730 |
case 36: // stw |
731 |
transfer_type = TYPE_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_NORM; break; |
732 |
case 37: // stwu |
733 |
transfer_type = TYPE_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_U; break; |
734 |
case 38: // stb |
735 |
transfer_type = TYPE_STORE; transfer_size = SIZE_BYTE; addr_mode = MODE_NORM; break; |
736 |
case 39: // stbu |
737 |
transfer_type = TYPE_STORE; transfer_size = SIZE_BYTE; addr_mode = MODE_U; break; |
738 |
case 40: // lhz |
739 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_NORM; break; |
740 |
case 41: // lhzu |
741 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_U; break; |
742 |
case 42: // lha |
743 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_NORM; break; |
744 |
case 43: // lhau |
745 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_U; break; |
746 |
case 44: // sth |
747 |
transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_NORM; break; |
748 |
case 45: // sthu |
749 |
transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_U; break; |
750 |
} |
751 |
|
752 |
// Calculate effective address |
753 |
uint32 addr = 0; |
754 |
switch (addr_mode) { |
755 |
case MODE_X: |
756 |
case MODE_UX: |
757 |
if (ra == 0) |
758 |
addr = segv_r[rb]; |
759 |
else |
760 |
addr = segv_r[ra] + segv_r[rb]; |
761 |
break; |
762 |
case MODE_NORM: |
763 |
case MODE_U: |
764 |
if (ra == 0) |
765 |
addr = (int32)(int16)imm; |
766 |
else |
767 |
addr = segv_r[ra] + (int32)(int16)imm; |
768 |
break; |
769 |
} |
770 |
|
771 |
// Ignore ROM writes |
772 |
if (transfer_type == TYPE_STORE && addr >= (uint32)ROMBaseHost && addr < (uint32)ROMBaseHost + ROMSize) { |
773 |
// D(bug("WARNING: %s write access to ROM at %p, 68k pc %p\n", transfer_size == SIZE_BYTE ? "Byte" : transfer_size == SIZE_HALFWORD ? "Halfword" : "Word", addr, r->pc)); |
774 |
if (addr_mode == MODE_U || addr_mode == MODE_UX) |
775 |
segv_r[ra] = addr; |
776 |
r->pc += 4; |
777 |
goto rti; |
778 |
} |
779 |
|
780 |
// For all other errors, jump into debugger |
781 |
char str[256]; |
782 |
sprintf(str, "SIGSEGV\n" |
783 |
" pc %08lx lr %08lx ctr %08lx msr %08lx\n" |
784 |
" xer %08lx cr %08lx fpscr %08lx\n" |
785 |
" r0 %08lx r1 %08lx r2 %08lx r3 %08lx\n" |
786 |
" r4 %08lx r5 %08lx r6 %08lx r7 %08lx\n" |
787 |
" r8 %08lx r9 %08lx r10 %08lx r11 %08lx\n" |
788 |
" r12 %08lx r13 %08lx r14 %08lx r15 %08lx\n" |
789 |
" r16 %08lx r17 %08lx r18 %08lx r19 %08lx\n" |
790 |
" r20 %08lx r21 %08lx r22 %08lx r23 %08lx\n" |
791 |
" r24 %08lx r25 %08lx r26 %08lx r27 %08lx\n" |
792 |
" r28 %08lx r29 %08lx r30 %08lx r31 %08lx\n", |
793 |
r->pc, r->lr, r->ctr, r->msr, |
794 |
r->xer, r->cr, r->fpscr, |
795 |
r->r0, r->r1, r->r2, r->r3, |
796 |
r->r4, r->r5, r->r6, r->r7, |
797 |
r->r8, r->r9, r->r10, r->r11, |
798 |
r->r12, segv_r[13], segv_r[14], segv_r[15], |
799 |
segv_r[16], segv_r[17], segv_r[18], segv_r[19], |
800 |
segv_r[20], segv_r[21], segv_r[22], segv_r[23], |
801 |
segv_r[24], segv_r[25], segv_r[26], segv_r[27], |
802 |
segv_r[28], segv_r[29], segv_r[30], segv_r[31]); |
803 |
disable_debugger(false); |
804 |
debugger(str); |
805 |
QuitEmulator(); |
806 |
return; |
807 |
|
808 |
rti: |
809 |
// Restore volatile registers |
810 |
r->r0 = segv_r[0]; |
811 |
r->r1 = segv_r[1]; |
812 |
r->r2 = segv_r[2]; |
813 |
r->r3 = segv_r[3]; |
814 |
r->r4 = segv_r[4]; |
815 |
r->r5 = segv_r[5]; |
816 |
r->r6 = segv_r[6]; |
817 |
r->r7 = segv_r[7]; |
818 |
r->r8 = segv_r[8]; |
819 |
r->r9 = segv_r[9]; |
820 |
r->r10 = segv_r[10]; |
821 |
r->r11 = segv_r[11]; |
822 |
r->r12 = segv_r[12]; |
823 |
} |
824 |
#endif |