| 1 |
/* |
| 2 |
* main_beos.cpp - Emulation core, BeOS implementation |
| 3 |
* |
| 4 |
* SheepShaver (C) 1997-2002 Christian Bauer and Marc Hellwig |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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|
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/* |
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* NOTES: |
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* |
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* SheepShaver uses three run-time environments, reflected by the value of XLM_RUN_MODE. |
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* The two modes which are also present in the original MacOS, are: |
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* MODE_68K - 68k emulator is active |
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* MODE_NATIVE - 68k emulator is inactive |
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* In the original MacOS, these two modes have different memory mappings and exception |
| 29 |
* tables. Under SheepShaver, the only difference is the handling of interrupts (see below). |
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* SheepShaver extends the 68k emulator with special opcodes (EMUL_OP) to perform faster |
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* mode switches when patching 68k routines with PowerPC code and adds a third run mode: |
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* MODE_EMUL_OP - 68k emulator active, but native register usage |
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* |
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* Switches between MODE_68K and MODE_NATIVE are only done with the Mixed Mode Manager |
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* (via nanokernel patches). The switch from MODE_68K to MODE_EMUL_OP occurs when executin |
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* one of the EMUL_OP 68k opcodes. When the opcode routine is done, it returns to MODE_68K. |
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* |
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* The Execute68k() routine allows EMUL_OP routines to execute 68k subroutines. It switches |
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* from MODE_EMUL_OP back to MODE_68K, so it must not be used by native routines (executing |
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* in MODE_NATIVE) nor by any other thread than the emul_thread (because the 68k emulator |
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* is not reentrant). When the 68k subroutine returns, it switches back to MODE_EMUL_OP. |
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* It is OK for a 68k routine called with Execute68k() to contain an EMUL_OP opcode. |
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* |
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* The handling of interrupts depends on the current run mode: |
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* MODE_68K - The USR1 signal handler sets one bit in the processor's CR. The 68k emulator |
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* will then execute the 68k interrupt routine when fetching the next instruction. |
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* MODE_NATIVE - The USR1 signal handler switches back to the original stack (signals run |
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* on a separate signal stack) and enters the External Interrupt routine in the |
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* nanokernel. |
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* MODE_EMUL_OP - The USR1 signal handler directly executes the 68k interrupt routine |
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* with Execute68k(). Before doing this, it must first check the current 68k interrupt |
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* level which is stored in XLM_68K_R25. This variable is set to the current level |
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* when entering EMUL_OP mode. Execute68k() also uses it to restore the level so that |
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* Execute68k()'d routines will run at the same interrupt level as the EMUL_OP routine |
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* it was called from. |
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*/ |
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|
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#include <Path.h> |
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#include <unistd.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 <string.h> |
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#include <time.h> |
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|
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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 "sony.h" |
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#include "disk.h" |
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#include "cdrom.h" |
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#include "scsi.h" |
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#include "video.h" |
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#include "audio.h" |
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#include "ether.h" |
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#include "serial.h" |
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#include "clip.h" |
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#include "extfs.h" |
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#include "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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|
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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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// Enable Execute68k() safety checks? |
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#define SAFE_EXEC_68K 0 |
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|
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// Save FP regs in Execute68k()? |
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#define SAVE_FP_EXEC_68K 0 |
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|
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// Interrupts in EMUL_OP mode? |
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#define INTERRUPTS_IN_EMUL_OP_MODE 1 |
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|
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// Interrupts in native mode? |
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#define INTERRUPTS_IN_NATIVE_MODE 1 |
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|
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|
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// Constants |
| 111 |
const char APP_SIGNATURE[] = "application/x-vnd.cebix-SheepShaver"; |
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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 char KERNEL_AREA_NAME[] = "Macintosh Kernel Data"; |
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const char KERNEL_AREA2_NAME[] = "Macintosh Kernel Data 2"; |
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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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|
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const uint32 ROM_AREA_SIZE = 0x500000; // Size of ROM area |
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|
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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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|
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const uint32 SIG_STACK_SIZE = 8192; // Size of signal stack |
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|
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const uint32 MSG_START = 'strt'; // Emulator start message |
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|
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|
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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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|
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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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|
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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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SheepShaver() : 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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sheep_fd = -1; |
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emulator_data = NULL; |
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kernel_area = kernel_area2 = rom_area = ram_area = dr_cache_area = -1; |
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emul_thread = nvram_thread = tick_thread = -1; |
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ReadyForSignals = false; |
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AllowQuitting = true; |
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NVRAMThreadActive = true; |
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TickThreadActive = true; |
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memset(last_xpram, 0, XPRAM_SIZE); |
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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 emul_thread; // Emulator thread |
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thread_id nvram_thread; // NVRAM watchdog thread |
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thread_id tick_thread; // 60Hz thread |
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|
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KernelData *kernel_data; // Pointer to Kernel Data |
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EmulatorData *emulator_data; |
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|
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bool ReadyForSignals; // Flag: emul_thread ready to receive signals |
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bool AllowQuitting; // Flag: Alt-Q quitting allowed |
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bool NVRAMThreadActive; // nvram_thread will exit when this is false |
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bool TickThreadActive; // tick_thread will exit when this is false |
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|
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uint8 last_xpram[XPRAM_SIZE]; // Buffer for monitoring XPRAM changes |
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|
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private: |
| 191 |
static status_t emul_func(void *arg); |
| 192 |
static status_t nvram_func(void *arg); |
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static status_t tick_func(void *arg); |
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static void sigusr1_invoc(int sig, void *arg, vregs *r); |
| 195 |
void sigusr1_handler(vregs *r); |
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static void sigsegv_invoc(int sig, void *arg, vregs *r); |
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static void sigill_invoc(int sig, void *arg, vregs *r); |
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void jump_to_rom(uint32 entry); |
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|
| 200 |
void init_rom(void); |
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void load_rom(void); |
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|
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int sheep_fd; // FD of sheep driver |
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|
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area_id kernel_area; // Kernel Data area ID |
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area_id kernel_area2; // Alternate Kernel Data area ID |
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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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area_id dr_cache_area; // DR Cache area ID |
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|
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struct sigaction sigusr1_action; // Interrupt signal (of emulator thread) |
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struct sigaction sigsegv_action; // Data access exception signal (of emulator thread) |
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struct sigaction sigill_action; // Illegal instruction 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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|
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// Global variables |
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SheepShaver *the_app; // Pointer to application object |
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#if !EMULATED_PPC |
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void *TOC; // TOC pointer |
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#endif |
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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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system_info SysInfo; // System information |
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|
| 238 |
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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|
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|
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// Prototypes |
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static void sigsegv_handler(vregs *r); |
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static void sigill_handler(vregs *r); |
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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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tzset(); |
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the_app = new SheepShaver(); |
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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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#if !EMULATED_PPC |
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static asm void *get_toc(void) |
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{ |
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mr r3,r2 |
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blr |
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} |
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#endif |
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|
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void SheepShaver::ReadyToRun(void) |
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{ |
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// Print some info |
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printf(GetString(STR_ABOUT_TEXT1), VERSION_MAJOR, VERSION_MINOR); |
| 277 |
printf(" %s\n", GetString(STR_ABOUT_TEXT2)); |
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|
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#if !EMULATED_PPC |
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// Get TOC pointer |
| 281 |
TOC = get_toc(); |
| 282 |
#endif |
| 283 |
|
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// Get system info |
| 285 |
get_system_info(&SysInfo); |
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switch (SysInfo.cpu_type) { |
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case B_CPU_PPC_601: |
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PVR = 0x00010000; |
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break; |
| 290 |
case B_CPU_PPC_603: |
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PVR = 0x00030000; |
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break; |
| 293 |
case B_CPU_PPC_603e: |
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PVR = 0x00060000; |
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break; |
| 296 |
case B_CPU_PPC_604: |
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PVR = 0x00040000; |
| 298 |
break; |
| 299 |
case B_CPU_PPC_604e: |
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PVR = 0x00090000; |
| 301 |
break; |
| 302 |
case B_CPU_PPC_750: |
| 303 |
PVR = 0x00080000; |
| 304 |
break; |
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default: |
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PVR = 0x00040000; |
| 307 |
break; |
| 308 |
} |
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CPUClockSpeed = SysInfo.cpu_clock_speed; |
| 310 |
BusClockSpeed = SysInfo.bus_clock_speed; |
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|
| 312 |
// Delete old areas |
| 313 |
area_id old_kernel_area = find_area(KERNEL_AREA_NAME); |
| 314 |
if (old_kernel_area > 0) |
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delete_area(old_kernel_area); |
| 316 |
area_id old_kernel2_area = find_area(KERNEL_AREA2_NAME); |
| 317 |
if (old_kernel2_area > 0) |
| 318 |
delete_area(old_kernel2_area); |
| 319 |
area_id old_ram_area = find_area(RAM_AREA_NAME); |
| 320 |
if (old_ram_area > 0) |
| 321 |
delete_area(old_ram_area); |
| 322 |
area_id old_rom_area = find_area(ROM_AREA_NAME); |
| 323 |
if (old_rom_area > 0) |
| 324 |
delete_area(old_rom_area); |
| 325 |
area_id old_dr_cache_area = find_area(DR_CACHE_AREA_NAME); |
| 326 |
if (old_dr_cache_area > 0) |
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delete_area(old_dr_cache_area); |
| 328 |
|
| 329 |
// Read preferences |
| 330 |
int argc = 0; |
| 331 |
char **argv = NULL; |
| 332 |
PrefsInit(argc, argv); |
| 333 |
|
| 334 |
// Init system routines |
| 335 |
SysInit(); |
| 336 |
|
| 337 |
// Test amount of RAM available for areas |
| 338 |
if (SysInfo.max_pages * B_PAGE_SIZE < 16 * 1024 * 1024) { |
| 339 |
ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR)); |
| 340 |
PostMessage(B_QUIT_REQUESTED); |
| 341 |
return; |
| 342 |
} |
| 343 |
|
| 344 |
// Show preferences editor (or start emulator directly) |
| 345 |
if (!PrefsFindBool("nogui")) |
| 346 |
PrefsEditor(MSG_START); |
| 347 |
else |
| 348 |
PostMessage(MSG_START); |
| 349 |
} |
| 350 |
|
| 351 |
|
| 352 |
/* |
| 353 |
* Message received |
| 354 |
*/ |
| 355 |
|
| 356 |
void SheepShaver::MessageReceived(BMessage *msg) |
| 357 |
{ |
| 358 |
switch (msg->what) { |
| 359 |
case MSG_START: |
| 360 |
StartEmulator(); |
| 361 |
break; |
| 362 |
default: |
| 363 |
BApplication::MessageReceived(msg); |
| 364 |
} |
| 365 |
} |
| 366 |
|
| 367 |
|
| 368 |
/* |
| 369 |
* Start emulator |
| 370 |
*/ |
| 371 |
|
| 372 |
void SheepShaver::StartEmulator(void) |
| 373 |
{ |
| 374 |
char str[256]; |
| 375 |
|
| 376 |
// Open sheep driver and remap low memory |
| 377 |
sheep_fd = open("/dev/sheep", 0); |
| 378 |
if (sheep_fd < 0) { |
| 379 |
sprintf(str, GetString(STR_NO_SHEEP_DRIVER_ERR), strerror(sheep_fd), sheep_fd); |
| 380 |
ErrorAlert(str); |
| 381 |
PostMessage(B_QUIT_REQUESTED); |
| 382 |
return; |
| 383 |
} |
| 384 |
status_t res = ioctl(sheep_fd, SHEEP_UP); |
| 385 |
if (res < 0) { |
| 386 |
sprintf(str, GetString(STR_SHEEP_UP_ERR), strerror(res), res); |
| 387 |
ErrorAlert(str); |
| 388 |
PostMessage(B_QUIT_REQUESTED); |
| 389 |
return; |
| 390 |
} |
| 391 |
|
| 392 |
// Create areas for Kernel Data |
| 393 |
kernel_data = (KernelData *)KERNEL_DATA_BASE; |
| 394 |
kernel_area = create_area(KERNEL_AREA_NAME, &kernel_data, B_EXACT_ADDRESS, KERNEL_AREA_SIZE, B_NO_LOCK, B_READ_AREA | B_WRITE_AREA); |
| 395 |
if (kernel_area < 0) { |
| 396 |
sprintf(str, GetString(STR_NO_KERNEL_DATA_ERR), strerror(kernel_area), kernel_area); |
| 397 |
ErrorAlert(str); |
| 398 |
PostMessage(B_QUIT_REQUESTED); |
| 399 |
return; |
| 400 |
} |
| 401 |
emulator_data = &kernel_data->ed; |
| 402 |
KernelDataAddr = (uint32)kernel_data; |
| 403 |
D(bug("Kernel Data area %ld at %p, Emulator Data at %p\n", kernel_area, kernel_data, emulator_data)); |
| 404 |
|
| 405 |
void *kernel_data2 = (void *)KERNEL_DATA2_BASE; |
| 406 |
kernel_area2 = clone_area(KERNEL_AREA2_NAME, &kernel_data2, B_EXACT_ADDRESS, B_READ_AREA | B_WRITE_AREA, kernel_area); |
| 407 |
if (kernel_area2 < 0) { |
| 408 |
sprintf(str, GetString(STR_NO_KERNEL_DATA_ERR), strerror(kernel_area2), kernel_area2); |
| 409 |
ErrorAlert(str); |
| 410 |
PostMessage(B_QUIT_REQUESTED); |
| 411 |
return; |
| 412 |
} |
| 413 |
D(bug("Kernel Data 2 area %ld at %p\n", kernel_area2, kernel_data2)); |
| 414 |
|
| 415 |
// Create area for Mac RAM |
| 416 |
RAMSize = PrefsFindInt32("ramsize") & 0xfff00000; // Round down to 1MB boundary |
| 417 |
if (RAMSize < 8*1024*1024) { |
| 418 |
WarningAlert(GetString(STR_SMALL_RAM_WARN)); |
| 419 |
RAMSize = 8*1024*1024; |
| 420 |
} |
| 421 |
|
| 422 |
RAMBase = 0x10000000; |
| 423 |
ram_area = create_area(RAM_AREA_NAME, (void **)&RAMBase, B_BASE_ADDRESS, RAMSize, B_NO_LOCK, B_READ_AREA | B_WRITE_AREA); |
| 424 |
if (ram_area < 0) { |
| 425 |
sprintf(str, GetString(STR_NO_RAM_AREA_ERR), strerror(ram_area), ram_area); |
| 426 |
ErrorAlert(str); |
| 427 |
PostMessage(B_QUIT_REQUESTED); |
| 428 |
return; |
| 429 |
} |
| 430 |
D(bug("RAM area %ld at %p\n", ram_area, RAMBase)); |
| 431 |
|
| 432 |
// Create area and load Mac ROM |
| 433 |
try { |
| 434 |
init_rom(); |
| 435 |
} catch (area_error) { |
| 436 |
ErrorAlert(GetString(STR_NO_ROM_AREA_ERR)); |
| 437 |
PostMessage(B_QUIT_REQUESTED); |
| 438 |
return; |
| 439 |
} catch (file_open_error) { |
| 440 |
ErrorAlert(GetString(STR_NO_ROM_FILE_ERR)); |
| 441 |
PostMessage(B_QUIT_REQUESTED); |
| 442 |
return; |
| 443 |
} catch (file_read_error) { |
| 444 |
ErrorAlert(GetString(STR_ROM_FILE_READ_ERR)); |
| 445 |
PostMessage(B_QUIT_REQUESTED); |
| 446 |
return; |
| 447 |
} catch (rom_size_error) { |
| 448 |
ErrorAlert(GetString(STR_ROM_SIZE_ERR)); |
| 449 |
PostMessage(B_QUIT_REQUESTED); |
| 450 |
return; |
| 451 |
} |
| 452 |
|
| 453 |
// Create area for DR Cache |
| 454 |
DRCacheAddr = DR_CACHE_BASE; |
| 455 |
dr_cache_area = create_area(DR_CACHE_AREA_NAME, (void **)&DRCacheAddr, B_EXACT_ADDRESS, DR_CACHE_SIZE, B_NO_LOCK, B_READ_AREA | B_WRITE_AREA); |
| 456 |
if (dr_cache_area < 0) { |
| 457 |
sprintf(str, GetString(STR_NO_KERNEL_DATA_ERR), strerror(dr_cache_area), dr_cache_area); |
| 458 |
ErrorAlert(str); |
| 459 |
PostMessage(B_QUIT_REQUESTED); |
| 460 |
return; |
| 461 |
} |
| 462 |
D(bug("DR Cache area %ld at %p\n", dr_cache_area, DRCacheAddr)); |
| 463 |
|
| 464 |
// Load NVRAM |
| 465 |
XPRAMInit(); |
| 466 |
|
| 467 |
// Set boot volume |
| 468 |
drive = PrefsFindInt32("bootdrive"); |
| 469 |
XPRAM[0x1378] = i16 >> 8; |
| 470 |
XPRAM[0x1379] = i16 & 0xff; |
| 471 |
driver = PrefsFindInt32("bootdriver"); |
| 472 |
XPRAM[0x137a] = i16 >> 8; |
| 473 |
XPRAM[0x137b] = i16 & 0xff; |
| 474 |
|
| 475 |
// Create BootGlobs at top of Mac memory |
| 476 |
memset((void *)(RAMBase + RAMSize - 4096), 0, 4096); |
| 477 |
BootGlobsAddr = RAMBase + RAMSize - 0x1c; |
| 478 |
uint32 *boot_globs = (uint32 *)BootGlobsAddr; |
| 479 |
boot_globs[-5] = htonl(RAMBase + RAMSize); // MemTop |
| 480 |
boot_globs[0] = htonl(RAMBase); // First RAM bank |
| 481 |
boot_globs[1] = htonl(RAMSize); |
| 482 |
boot_globs[2] = htonl((uint32)-1); // End of bank table |
| 483 |
|
| 484 |
// Init drivers |
| 485 |
SonyInit(); |
| 486 |
DiskInit(); |
| 487 |
CDROMInit(); |
| 488 |
SCSIInit(); |
| 489 |
|
| 490 |
// Init external file system |
| 491 |
ExtFSInit(); |
| 492 |
|
| 493 |
// Init audio |
| 494 |
AudioInit(); |
| 495 |
|
| 496 |
// Init network |
| 497 |
EtherInit(); |
| 498 |
|
| 499 |
// Init serial ports |
| 500 |
SerialInit(); |
| 501 |
|
| 502 |
// Init Time Manager |
| 503 |
TimerInit(); |
| 504 |
|
| 505 |
// Init clipboard |
| 506 |
ClipInit(); |
| 507 |
|
| 508 |
// Init video |
| 509 |
if (!VideoInit()) { |
| 510 |
PostMessage(B_QUIT_REQUESTED); |
| 511 |
return; |
| 512 |
} |
| 513 |
|
| 514 |
// Install ROM patches |
| 515 |
if (!PatchROM()) { |
| 516 |
ErrorAlert(GetString(STR_UNSUPPORTED_ROM_TYPE_ERR)); |
| 517 |
PostMessage(B_QUIT_REQUESTED); |
| 518 |
return; |
| 519 |
} |
| 520 |
|
| 521 |
// Clear caches (as we loaded and patched code) and write protect ROM |
| 522 |
#if !EMULATED_PPC |
| 523 |
clear_caches((void *)ROM_BASE, ROM_AREA_SIZE, B_INVALIDATE_ICACHE | B_FLUSH_DCACHE); |
| 524 |
#endif |
| 525 |
set_area_protection(rom_area, B_READ_AREA); |
| 526 |
|
| 527 |
// Initialize Kernel Data |
| 528 |
memset(kernel_data, 0, sizeof(KernelData)); |
| 529 |
if (ROMType == ROMTYPE_NEWWORLD) { |
| 530 |
static uint32 of_dev_tree[4] = {0, 0, 0, 0}; |
| 531 |
static uint8 vector_lookup_tbl[128]; |
| 532 |
static uint8 vector_mask_tbl[64]; |
| 533 |
memset((uint8 *)kernel_data + 0xb80, 0x3d, 0x80); |
| 534 |
memset(vector_lookup_tbl, 0, 128); |
| 535 |
memset(vector_mask_tbl, 0, 64); |
| 536 |
kernel_data->v[0xb80 >> 2] = htonl(ROM_BASE); |
| 537 |
kernel_data->v[0xb84 >> 2] = htonl((uint32)of_dev_tree); // OF device tree base |
| 538 |
kernel_data->v[0xb90 >> 2] = htonl((uint32)vector_lookup_tbl); |
| 539 |
kernel_data->v[0xb94 >> 2] = htonl((uint32)vector_mask_tbl); |
| 540 |
kernel_data->v[0xb98 >> 2] = htonl(ROM_BASE); // OpenPIC base |
| 541 |
kernel_data->v[0xbb0 >> 2] = htonl(0); // ADB base |
| 542 |
kernel_data->v[0xc20 >> 2] = htonl(RAMSize); |
| 543 |
kernel_data->v[0xc24 >> 2] = htonl(RAMSize); |
| 544 |
kernel_data->v[0xc30 >> 2] = htonl(RAMSize); |
| 545 |
kernel_data->v[0xc34 >> 2] = htonl(RAMSize); |
| 546 |
kernel_data->v[0xc38 >> 2] = htonl(0x00010020); |
| 547 |
kernel_data->v[0xc3c >> 2] = htonl(0x00200001); |
| 548 |
kernel_data->v[0xc40 >> 2] = htonl(0x00010000); |
| 549 |
kernel_data->v[0xc50 >> 2] = htonl(RAMBase); |
| 550 |
kernel_data->v[0xc54 >> 2] = htonl(RAMSize); |
| 551 |
kernel_data->v[0xf60 >> 2] = htonl(PVR); |
| 552 |
kernel_data->v[0xf64 >> 2] = htonl(CPUClockSpeed); |
| 553 |
kernel_data->v[0xf68 >> 2] = htonl(BusClockSpeed); |
| 554 |
kernel_data->v[0xf6c >> 2] = htonl(CPUClockSpeed); |
| 555 |
} else { |
| 556 |
kernel_data->v[0xc80 >> 2] = htonl(RAMSize); |
| 557 |
kernel_data->v[0xc84 >> 2] = htonl(RAMSize); |
| 558 |
kernel_data->v[0xc90 >> 2] = htonl(RAMSize); |
| 559 |
kernel_data->v[0xc94 >> 2] = htonl(RAMSize); |
| 560 |
kernel_data->v[0xc98 >> 2] = htonl(0x00010020); |
| 561 |
kernel_data->v[0xc9c >> 2] = htonl(0x00200001); |
| 562 |
kernel_data->v[0xca0 >> 2] = htonl(0x00010000); |
| 563 |
kernel_data->v[0xcb0 >> 2] = htonl(RAMBase); |
| 564 |
kernel_data->v[0xcb4 >> 2] = htonl(RAMSize); |
| 565 |
kernel_data->v[0xf80 >> 2] = htonl(PVR); |
| 566 |
kernel_data->v[0xf84 >> 2] = htonl(CPUClockSpeed); |
| 567 |
kernel_data->v[0xf88 >> 2] = htonl(BusClockSpeed); |
| 568 |
kernel_data->v[0xf8c >> 2] = htonl(CPUClockSpeed); |
| 569 |
} |
| 570 |
|
| 571 |
// Initialize extra low memory |
| 572 |
D(bug("Initializing Low Memory...\n")); |
| 573 |
memset(NULL, 0, 0x3000); |
| 574 |
WriteMacInt32(XLM_SIGNATURE, 'Baah'); // Signature to detect SheepShaver |
| 575 |
WriteMacInt32(XLM_KERNEL_DATA, (uint32)kernel_data); // For trap replacement routines |
| 576 |
WriteMacInt32(XLM_SHEEP_OBJ, (uint32)this); // Pointer to SheepShaver object |
| 577 |
WriteMacInt32(XLM_PVR, PVR); // Theoretical PVR |
| 578 |
WriteMacInt32(XLM_BUS_CLOCK, BusClockSpeed); // For DriverServicesLib patch |
| 579 |
WriteMacInt16(XLM_EXEC_RETURN_OPCODE, M68K_EXEC_RETURN); // For Execute68k() (RTS from the executed 68k code will jump here and end 68k mode) |
| 580 |
#if !EMULATED_PPC |
| 581 |
WriteMacInt32(XLM_TOC, (uint32)TOC); // TOC pointer of emulator |
| 582 |
WriteMacInt32(XLM_ETHER_INIT, *(uint32 *)InitStreamModule); // DLPI ethernet driver functions |
| 583 |
WriteMacInt32(XLM_ETHER_TERM, *(uint32 *)TerminateStreamModule); |
| 584 |
WriteMacInt32(XLM_ETHER_OPEN, *(uint32 *)ether_open); |
| 585 |
WriteMacInt32(XLM_ETHER_CLOSE, *(uint32 *)ether_close); |
| 586 |
WriteMacInt32(XLM_ETHER_WPUT, *(uint32 *)ether_wput); |
| 587 |
WriteMacInt32(XLM_ETHER_RSRV, *(uint32 *)ether_rsrv); |
| 588 |
WriteMacInt32(XLM_VIDEO_DOIO, *(uint32 *)VideoDoDriverIO); |
| 589 |
#endif |
| 590 |
D(bug("Low Memory initialized\n")); |
| 591 |
|
| 592 |
// Disallow quitting with Alt-Q from now on |
| 593 |
AllowQuitting = false; |
| 594 |
|
| 595 |
// Start 60Hz interrupt |
| 596 |
tick_thread = spawn_thread(tick_func, "60Hz", B_URGENT_DISPLAY_PRIORITY, this); |
| 597 |
resume_thread(tick_thread); |
| 598 |
|
| 599 |
// Start NVRAM watchdog thread |
| 600 |
memcpy(last_xpram, XPRAM, XPRAM_SIZE); |
| 601 |
nvram_thread = spawn_thread(nvram_func, "NVRAM Watchdog", B_LOW_PRIORITY, this); |
| 602 |
resume_thread(nvram_thread); |
| 603 |
|
| 604 |
// Start emulator thread |
| 605 |
emul_thread = spawn_thread(emul_func, "MacOS", B_NORMAL_PRIORITY, this); |
| 606 |
resume_thread(emul_thread); |
| 607 |
} |
| 608 |
|
| 609 |
|
| 610 |
/* |
| 611 |
* Quit requested |
| 612 |
*/ |
| 613 |
|
| 614 |
bool SheepShaver::QuitRequested(void) |
| 615 |
{ |
| 616 |
if (AllowQuitting) |
| 617 |
return BApplication::QuitRequested(); |
| 618 |
else |
| 619 |
return false; |
| 620 |
} |
| 621 |
|
| 622 |
void SheepShaver::Quit(void) |
| 623 |
{ |
| 624 |
status_t l; |
| 625 |
|
| 626 |
// Stop 60Hz interrupt |
| 627 |
if (tick_thread > 0) { |
| 628 |
TickThreadActive = false; |
| 629 |
wait_for_thread(tick_thread, &l); |
| 630 |
} |
| 631 |
|
| 632 |
// Stop NVRAM watchdog |
| 633 |
if (nvram_thread > 0) { |
| 634 |
status_t l; |
| 635 |
NVRAMThreadActive = false; |
| 636 |
suspend_thread(nvram_thread); // Wake thread up from snooze() |
| 637 |
snooze(1000); |
| 638 |
resume_thread(nvram_thread); |
| 639 |
while (wait_for_thread(nvram_thread, &l) == B_INTERRUPTED) ; |
| 640 |
} |
| 641 |
|
| 642 |
// Wait for emulator thread to finish |
| 643 |
if (emul_thread > 0) |
| 644 |
wait_for_thread(emul_thread, &l); |
| 645 |
|
| 646 |
// Save NVRAM |
| 647 |
XPRAMExit(); |
| 648 |
|
| 649 |
// Exit clipboard |
| 650 |
ClipExit(); |
| 651 |
|
| 652 |
// Exit Time Manager |
| 653 |
TimerExit(); |
| 654 |
|
| 655 |
// Exit serial |
| 656 |
SerialExit(); |
| 657 |
|
| 658 |
// Exit network |
| 659 |
EtherExit(); |
| 660 |
|
| 661 |
// Exit audio |
| 662 |
AudioExit(); |
| 663 |
|
| 664 |
// Exit video |
| 665 |
VideoExit(); |
| 666 |
|
| 667 |
// Exit external file system |
| 668 |
ExtFSExit(); |
| 669 |
|
| 670 |
// Exit drivers |
| 671 |
SCSIExit(); |
| 672 |
CDROMExit(); |
| 673 |
DiskExit(); |
| 674 |
SonyExit(); |
| 675 |
|
| 676 |
// Delete DR Cache area |
| 677 |
if (dr_cache_area >= 0) |
| 678 |
delete_area(dr_cache_area); |
| 679 |
|
| 680 |
// Delete ROM area |
| 681 |
if (rom_area >= 0) |
| 682 |
delete_area(rom_area); |
| 683 |
|
| 684 |
// Delete RAM area |
| 685 |
if (ram_area >= 0) |
| 686 |
delete_area(ram_area); |
| 687 |
|
| 688 |
// Delete Kernel Data area2 |
| 689 |
if (kernel_area2 >= 0) |
| 690 |
delete_area(kernel_area2); |
| 691 |
if (kernel_area >= 0) |
| 692 |
delete_area(kernel_area); |
| 693 |
|
| 694 |
// Unmap low memory and close sheep driver |
| 695 |
if (sheep_fd >= 0) { |
| 696 |
ioctl(sheep_fd, SHEEP_DOWN); |
| 697 |
close(sheep_fd); |
| 698 |
} |
| 699 |
|
| 700 |
// Exit system routines |
| 701 |
SysExit(); |
| 702 |
|
| 703 |
// Exit preferences |
| 704 |
PrefsExit(); |
| 705 |
|
| 706 |
BApplication::Quit(); |
| 707 |
} |
| 708 |
|
| 709 |
|
| 710 |
/* |
| 711 |
* Create area for ROM (sets rom_area) and load ROM file |
| 712 |
* |
| 713 |
* area_error : Cannot create area |
| 714 |
* file_open_error: Cannot open ROM file |
| 715 |
* file_read_error: Cannot read ROM file |
| 716 |
*/ |
| 717 |
|
| 718 |
void SheepShaver::init_rom(void) |
| 719 |
{ |
| 720 |
// Create area for ROM |
| 721 |
void *rom_addr = (void *)ROM_BASE; |
| 722 |
rom_area = create_area(ROM_AREA_NAME, &rom_addr, B_EXACT_ADDRESS, ROM_AREA_SIZE, B_NO_LOCK, B_READ_AREA | B_WRITE_AREA); |
| 723 |
if (rom_area < 0) |
| 724 |
throw area_error(); |
| 725 |
D(bug("ROM area %ld at %p\n", rom_area, rom_addr)); |
| 726 |
|
| 727 |
// Load ROM |
| 728 |
load_rom(); |
| 729 |
} |
| 730 |
|
| 731 |
|
| 732 |
/* |
| 733 |
* Load ROM file |
| 734 |
* |
| 735 |
* file_open_error: Cannot open ROM file (nor use built-in ROM) |
| 736 |
* file_read_error: Cannot read ROM file |
| 737 |
*/ |
| 738 |
|
| 739 |
// Decode LZSS data |
| 740 |
static void decode_lzss(const uint8 *src, uint8 *dest, int size) |
| 741 |
{ |
| 742 |
char dict[0x1000]; |
| 743 |
int run_mask = 0, dict_idx = 0xfee; |
| 744 |
for (;;) { |
| 745 |
if (run_mask < 0x100) { |
| 746 |
// Start new run |
| 747 |
if (--size < 0) |
| 748 |
break; |
| 749 |
run_mask = *src++ | 0xff00; |
| 750 |
} |
| 751 |
bool bit = run_mask & 1; |
| 752 |
run_mask >>= 1; |
| 753 |
if (bit) { |
| 754 |
// Verbatim copy |
| 755 |
if (--size < 0) |
| 756 |
break; |
| 757 |
int c = *src++; |
| 758 |
dict[dict_idx++] = c; |
| 759 |
*dest++ = c; |
| 760 |
dict_idx &= 0xfff; |
| 761 |
} else { |
| 762 |
// Copy from dictionary |
| 763 |
if (--size < 0) |
| 764 |
break; |
| 765 |
int idx = *src++; |
| 766 |
if (--size < 0) |
| 767 |
break; |
| 768 |
int cnt = *src++; |
| 769 |
idx |= (cnt << 4) & 0xf00; |
| 770 |
cnt = (cnt & 0x0f) + 3; |
| 771 |
while (cnt--) { |
| 772 |
char c = dict[idx++]; |
| 773 |
dict[dict_idx++] = c; |
| 774 |
*dest++ = c; |
| 775 |
idx &= 0xfff; |
| 776 |
dict_idx &= 0xfff; |
| 777 |
} |
| 778 |
} |
| 779 |
} |
| 780 |
} |
| 781 |
|
| 782 |
void SheepShaver::load_rom(void) |
| 783 |
{ |
| 784 |
// Get rom file path from preferences |
| 785 |
const char *rom_path = PrefsFindString("rom"); |
| 786 |
|
| 787 |
// Try to open ROM file |
| 788 |
BFile file(rom_path ? rom_path : ROM_FILE_NAME, B_READ_ONLY); |
| 789 |
if (file.InitCheck() != B_NO_ERROR) { |
| 790 |
|
| 791 |
// Failed, then ask memory_mess driver for ROM |
| 792 |
uint8 *rom = new uint8[ROM_SIZE]; // Reading directly into the area doesn't work |
| 793 |
ssize_t actual = read(sheep_fd, (void *)rom, ROM_SIZE); |
| 794 |
if (actual == ROM_SIZE) { |
| 795 |
memcpy((void *)ROM_BASE, rom, ROM_SIZE); |
| 796 |
delete[] rom; |
| 797 |
return; |
| 798 |
} else |
| 799 |
throw file_open_error(); |
| 800 |
} |
| 801 |
|
| 802 |
printf(GetString(STR_READING_ROM_FILE)); |
| 803 |
|
| 804 |
// Get file size |
| 805 |
off_t rom_size = 0; |
| 806 |
file.GetSize(&rom_size); |
| 807 |
|
| 808 |
uint8 *rom = new uint8[ROM_SIZE]; // Reading directly into the area doesn't work |
| 809 |
ssize_t actual = file.Read((void *)rom, ROM_SIZE); |
| 810 |
if (actual == ROM_SIZE) { |
| 811 |
// Plain ROM image |
| 812 |
memcpy((void *)ROM_BASE, rom, ROM_SIZE); |
| 813 |
delete[] rom; |
| 814 |
} else { |
| 815 |
if (strncmp((char *)rom, "<CHRP-BOOT>", 11) == 0) { |
| 816 |
// CHRP compressed ROM image |
| 817 |
D(bug("CHRP ROM image\n")); |
| 818 |
uint32 lzss_offset, lzss_size; |
| 819 |
|
| 820 |
char *s = strstr((char *)rom, "constant lzss-offset"); |
| 821 |
if (s == NULL) |
| 822 |
throw rom_size_error(); |
| 823 |
s -= 7; |
| 824 |
if (sscanf(s, "%06lx", &lzss_offset) != 1) |
| 825 |
throw rom_size_error(); |
| 826 |
s = strstr((char *)rom, "constant lzss-size"); |
| 827 |
if (s == NULL) |
| 828 |
throw rom_size_error(); |
| 829 |
s -= 7; |
| 830 |
if (sscanf(s, "%06lx", &lzss_size) != 1) |
| 831 |
throw rom_size_error(); |
| 832 |
D(bug("Offset of compressed data: %08lx\n", lzss_offset)); |
| 833 |
D(bug("Size of compressed data: %08lx\n", lzss_size)); |
| 834 |
|
| 835 |
D(bug("Uncompressing ROM...\n")); |
| 836 |
decode_lzss(rom + lzss_offset, (uint8 *)ROM_BASE, lzss_size); |
| 837 |
delete[] rom; |
| 838 |
} else if (rom_size != 4*1024*1024) |
| 839 |
throw rom_size_error(); |
| 840 |
else |
| 841 |
throw file_read_error(); |
| 842 |
} |
| 843 |
} |
| 844 |
|
| 845 |
|
| 846 |
/* |
| 847 |
* Emulator thread function |
| 848 |
*/ |
| 849 |
|
| 850 |
status_t SheepShaver::emul_func(void *arg) |
| 851 |
{ |
| 852 |
SheepShaver *obj = (SheepShaver *)arg; |
| 853 |
|
| 854 |
// Install interrupt signal handler |
| 855 |
sigemptyset(&obj->sigusr1_action.sa_mask); |
| 856 |
obj->sigusr1_action.sa_handler = (__signal_func_ptr)(obj->sigusr1_invoc); |
| 857 |
obj->sigusr1_action.sa_flags = 0; |
| 858 |
obj->sigusr1_action.sa_userdata = arg; |
| 859 |
sigaction(SIGUSR1, &obj->sigusr1_action, NULL); |
| 860 |
|
| 861 |
// Install data access signal handler |
| 862 |
sigemptyset(&obj->sigsegv_action.sa_mask); |
| 863 |
obj->sigsegv_action.sa_handler = (__signal_func_ptr)(obj->sigsegv_invoc); |
| 864 |
obj->sigsegv_action.sa_flags = 0; |
| 865 |
obj->sigsegv_action.sa_userdata = arg; |
| 866 |
sigaction(SIGSEGV, &obj->sigsegv_action, NULL); |
| 867 |
|
| 868 |
#if !EMULATED_PPC |
| 869 |
// Install illegal instruction signal handler |
| 870 |
sigemptyset(&obj->sigill_action.sa_mask); |
| 871 |
obj->sigill_action.sa_handler = (__signal_func_ptr)(obj->sigill_invoc); |
| 872 |
obj->sigill_action.sa_flags = 0; |
| 873 |
obj->sigill_action.sa_userdata = arg; |
| 874 |
sigaction(SIGILL, &obj->sigill_action, NULL); |
| 875 |
#endif |
| 876 |
|
| 877 |
// Exceptions will send signals |
| 878 |
disable_debugger(true); |
| 879 |
|
| 880 |
// Install signal stack |
| 881 |
sig_stack = malloc(SIG_STACK_SIZE); |
| 882 |
extra_stack = malloc(SIG_STACK_SIZE); |
| 883 |
set_signal_stack(sig_stack, SIG_STACK_SIZE); |
| 884 |
|
| 885 |
// We're now ready to receive signals |
| 886 |
obj->ReadyForSignals = true; |
| 887 |
|
| 888 |
// Jump to ROM boot routine |
| 889 |
D(bug("Jumping to ROM\n")); |
| 890 |
obj->jump_to_rom(ROM_BASE + 0x310000); |
| 891 |
D(bug("Returned from ROM\n")); |
| 892 |
|
| 893 |
// We're no longer ready to receive signals |
| 894 |
obj->ReadyForSignals = false; |
| 895 |
obj->AllowQuitting = true; |
| 896 |
|
| 897 |
// Quit program |
| 898 |
be_app->PostMessage(B_QUIT_REQUESTED); |
| 899 |
return 0; |
| 900 |
} |
| 901 |
|
| 902 |
|
| 903 |
/* |
| 904 |
* Jump into Mac ROM, start 680x0 emulator |
| 905 |
* (also contains other EMUL_RETURN and EMUL_OP routines) |
| 906 |
*/ |
| 907 |
|
| 908 |
#if EMULATED_PPC |
| 909 |
extern void emul_ppc(uint32 start); |
| 910 |
extern void init_emul_ppc(void); |
| 911 |
void SheepShaver::jump_to_rom(uint32 entry) |
| 912 |
{ |
| 913 |
init_emul_ppc(); |
| 914 |
emul_ppc(entry); |
| 915 |
} |
| 916 |
#else |
| 917 |
asm void SheepShaver::jump_to_rom(register uint32 entry) |
| 918 |
{ |
| 919 |
// Create stack frame |
| 920 |
mflr r0 |
| 921 |
stw r0,8(r1) |
| 922 |
mfcr r0 |
| 923 |
stw r0,4(r1) |
| 924 |
stwu r1,-(56+19*4+18*8)(r1) |
| 925 |
|
| 926 |
// Save PowerPC registers |
| 927 |
stmw r13,56(r1) |
| 928 |
stfd f14,56+19*4+0*8(r1) |
| 929 |
stfd f15,56+19*4+1*8(r1) |
| 930 |
stfd f16,56+19*4+2*8(r1) |
| 931 |
stfd f17,56+19*4+3*8(r1) |
| 932 |
stfd f18,56+19*4+4*8(r1) |
| 933 |
stfd f19,56+19*4+5*8(r1) |
| 934 |
stfd f20,56+19*4+6*8(r1) |
| 935 |
stfd f21,56+19*4+7*8(r1) |
| 936 |
stfd f22,56+19*4+8*8(r1) |
| 937 |
stfd f23,56+19*4+9*8(r1) |
| 938 |
stfd f24,56+19*4+10*8(r1) |
| 939 |
stfd f25,56+19*4+11*8(r1) |
| 940 |
stfd f26,56+19*4+12*8(r1) |
| 941 |
stfd f27,56+19*4+13*8(r1) |
| 942 |
stfd f28,56+19*4+14*8(r1) |
| 943 |
stfd f29,56+19*4+15*8(r1) |
| 944 |
stfd f30,56+19*4+16*8(r1) |
| 945 |
stfd f31,56+19*4+17*8(r1) |
| 946 |
|
| 947 |
// Move entry address to ctr, get pointer to Emulator Data |
| 948 |
mtctr r4 |
| 949 |
lwz r4,SheepShaver.emulator_data(r3) |
| 950 |
|
| 951 |
// Skip over EMUL_RETURN routine and get its address |
| 952 |
bl @1 |
| 953 |
|
| 954 |
|
| 955 |
/* |
| 956 |
* EMUL_RETURN: Returned from emulator |
| 957 |
*/ |
| 958 |
|
| 959 |
// Restore PowerPC registers |
| 960 |
lwz r1,XLM_EMUL_RETURN_STACK |
| 961 |
lwz r2,XLM_TOC |
| 962 |
lmw r13,56(r1) |
| 963 |
lfd f14,56+19*4+0*8(r1) |
| 964 |
lfd f15,56+19*4+1*8(r1) |
| 965 |
lfd f16,56+19*4+2*8(r1) |
| 966 |
lfd f17,56+19*4+3*8(r1) |
| 967 |
lfd f18,56+19*4+4*8(r1) |
| 968 |
lfd f19,56+19*4+5*8(r1) |
| 969 |
lfd f20,56+19*4+6*8(r1) |
| 970 |
lfd f21,56+19*4+7*8(r1) |
| 971 |
lfd f22,56+19*4+8*8(r1) |
| 972 |
lfd f23,56+19*4+9*8(r1) |
| 973 |
lfd f24,56+19*4+10*8(r1) |
| 974 |
lfd f25,56+19*4+11*8(r1) |
| 975 |
lfd f26,56+19*4+12*8(r1) |
| 976 |
lfd f27,56+19*4+13*8(r1) |
| 977 |
lfd f28,56+19*4+14*8(r1) |
| 978 |
lfd f29,56+19*4+15*8(r1) |
| 979 |
lfd f30,56+19*4+16*8(r1) |
| 980 |
lfd f31,56+19*4+17*8(r1) |
| 981 |
|
| 982 |
// Exiting from 68k emulator |
| 983 |
li r0,1 |
| 984 |
stw r0,XLM_IRQ_NEST |
| 985 |
li r0,MODE_NATIVE |
| 986 |
stw r0,XLM_RUN_MODE |
| 987 |
|
| 988 |
// Return to caller of jump_to_rom() |
| 989 |
lwz r0,56+19*4+18*8+8(r1) |
| 990 |
mtlr r0 |
| 991 |
lwz r0,56+19*4+18*8+4(r1) |
| 992 |
mtcrf 0xff,r0 |
| 993 |
addi r1,r1,56+19*4+18*8 |
| 994 |
blr |
| 995 |
|
| 996 |
|
| 997 |
// Save address of EMUL_RETURN routine for 68k emulator patch |
| 998 |
@1 mflr r0 |
| 999 |
stw r0,XLM_EMUL_RETURN_PROC |
| 1000 |
|
| 1001 |
// Skip over EXEC_RETURN routine and get its address |
| 1002 |
bl @2 |
| 1003 |
|
| 1004 |
|
| 1005 |
/* |
| 1006 |
* EXEC_RETURN: Returned from 68k routine executed with Execute68k() |
| 1007 |
*/ |
| 1008 |
|
| 1009 |
// Save r25 (contains current 68k interrupt level) |
| 1010 |
stw r25,XLM_68K_R25 |
| 1011 |
|
| 1012 |
// Reentering EMUL_OP mode |
| 1013 |
li r0,MODE_EMUL_OP |
| 1014 |
stw r0,XLM_RUN_MODE |
| 1015 |
|
| 1016 |
// Save 68k registers |
| 1017 |
lwz r4,56+19*4+18*8+12(r1) |
| 1018 |
stw r8,M68kRegisters.d[0](r4) |
| 1019 |
stw r9,M68kRegisters.d[1](r4) |
| 1020 |
stw r10,M68kRegisters.d[2](r4) |
| 1021 |
stw r11,M68kRegisters.d[3](r4) |
| 1022 |
stw r12,M68kRegisters.d[4](r4) |
| 1023 |
stw r13,M68kRegisters.d[5](r4) |
| 1024 |
stw r14,M68kRegisters.d[6](r4) |
| 1025 |
stw r15,M68kRegisters.d[7](r4) |
| 1026 |
stw r16,M68kRegisters.a[0](r4) |
| 1027 |
stw r17,M68kRegisters.a[1](r4) |
| 1028 |
stw r18,M68kRegisters.a[2](r4) |
| 1029 |
stw r19,M68kRegisters.a[3](r4) |
| 1030 |
stw r20,M68kRegisters.a[4](r4) |
| 1031 |
stw r21,M68kRegisters.a[5](r4) |
| 1032 |
stw r22,M68kRegisters.a[6](r4) |
| 1033 |
|
| 1034 |
// Restore PowerPC registers |
| 1035 |
lmw r13,56(r1) |
| 1036 |
#if SAVE_FP_EXEC_68K |
| 1037 |
lfd f14,56+19*4+0*8(r1) |
| 1038 |
lfd f15,56+19*4+1*8(r1) |
| 1039 |
lfd f16,56+19*4+2*8(r1) |
| 1040 |
lfd f17,56+19*4+3*8(r1) |
| 1041 |
lfd f18,56+19*4+4*8(r1) |
| 1042 |
lfd f19,56+19*4+5*8(r1) |
| 1043 |
lfd f20,56+19*4+6*8(r1) |
| 1044 |
lfd f21,56+19*4+7*8(r1) |
| 1045 |
lfd f22,56+19*4+8*8(r1) |
| 1046 |
lfd f23,56+19*4+9*8(r1) |
| 1047 |
lfd f24,56+19*4+10*8(r1) |
| 1048 |
lfd f25,56+19*4+11*8(r1) |
| 1049 |
lfd f26,56+19*4+12*8(r1) |
| 1050 |
lfd f27,56+19*4+13*8(r1) |
| 1051 |
lfd f28,56+19*4+14*8(r1) |
| 1052 |
lfd f29,56+19*4+15*8(r1) |
| 1053 |
lfd f30,56+19*4+16*8(r1) |
| 1054 |
lfd f31,56+19*4+17*8(r1) |
| 1055 |
#endif |
| 1056 |
|
| 1057 |
// Return to caller |
| 1058 |
lwz r0,56+19*4+18*8+8(r1) |
| 1059 |
mtlr r0 |
| 1060 |
addi r1,r1,56+19*4+18*8 |
| 1061 |
blr |
| 1062 |
|
| 1063 |
|
| 1064 |
// Stave address of EXEC_RETURN routine for 68k emulator patch |
| 1065 |
@2 mflr r0 |
| 1066 |
stw r0,XLM_EXEC_RETURN_PROC |
| 1067 |
|
| 1068 |
// Skip over EMUL_BREAK/EMUL_OP routine and get its address |
| 1069 |
bl @3 |
| 1070 |
|
| 1071 |
|
| 1072 |
/* |
| 1073 |
* EMUL_BREAK/EMUL_OP: Execute native routine, selector in r5 (my own private mode switch) |
| 1074 |
* |
| 1075 |
* 68k registers are stored in a M68kRegisters struct on the stack |
| 1076 |
* which the native routine may read and modify |
| 1077 |
*/ |
| 1078 |
|
| 1079 |
// Save r25 (contains current 68k interrupt level) |
| 1080 |
stw r25,XLM_68K_R25 |
| 1081 |
|
| 1082 |
// Entering EMUL_OP mode within 68k emulator |
| 1083 |
li r0,MODE_EMUL_OP |
| 1084 |
stw r0,XLM_RUN_MODE |
| 1085 |
|
| 1086 |
// Create PowerPC stack frame, reserve space for M68kRegisters |
| 1087 |
mr r3,r1 |
| 1088 |
subi r1,r1,56 // Fake "caller" frame |
| 1089 |
rlwinm r1,r1,0,0,29 // Align stack |
| 1090 |
|
| 1091 |
mfcr r0 |
| 1092 |
rlwinm r0,r0,0,11,8 |
| 1093 |
stw r0,4(r1) |
| 1094 |
mfxer r0 |
| 1095 |
stw r0,16(r1) |
| 1096 |
stw r2,12(r1) |
| 1097 |
stwu r1,-(56+16*4+15*8)(r1) |
| 1098 |
lwz r2,XLM_TOC |
| 1099 |
|
| 1100 |
// Save 68k registers |
| 1101 |
stw r8,56+M68kRegisters.d[0](r1) |
| 1102 |
stw r9,56+M68kRegisters.d[1](r1) |
| 1103 |
stw r10,56+M68kRegisters.d[2](r1) |
| 1104 |
stw r11,56+M68kRegisters.d[3](r1) |
| 1105 |
stw r12,56+M68kRegisters.d[4](r1) |
| 1106 |
stw r13,56+M68kRegisters.d[5](r1) |
| 1107 |
stw r14,56+M68kRegisters.d[6](r1) |
| 1108 |
stw r15,56+M68kRegisters.d[7](r1) |
| 1109 |
stw r16,56+M68kRegisters.a[0](r1) |
| 1110 |
stw r17,56+M68kRegisters.a[1](r1) |
| 1111 |
stw r18,56+M68kRegisters.a[2](r1) |
| 1112 |
stw r19,56+M68kRegisters.a[3](r1) |
| 1113 |
stw r20,56+M68kRegisters.a[4](r1) |
| 1114 |
stw r21,56+M68kRegisters.a[5](r1) |
| 1115 |
stw r22,56+M68kRegisters.a[6](r1) |
| 1116 |
stw r3,56+M68kRegisters.a[7](r1) |
| 1117 |
stfd f0,56+16*4+0*8(r1) |
| 1118 |
stfd f1,56+16*4+1*8(r1) |
| 1119 |
stfd f2,56+16*4+2*8(r1) |
| 1120 |
stfd f3,56+16*4+3*8(r1) |
| 1121 |
stfd f4,56+16*4+4*8(r1) |
| 1122 |
stfd f5,56+16*4+5*8(r1) |
| 1123 |
stfd f6,56+16*4+6*8(r1) |
| 1124 |
stfd f7,56+16*4+7*8(r1) |
| 1125 |
mffs f0 |
| 1126 |
stfd f8,56+16*4+8*8(r1) |
| 1127 |
stfd f9,56+16*4+9*8(r1) |
| 1128 |
stfd f10,56+16*4+10*8(r1) |
| 1129 |
stfd f11,56+16*4+11*8(r1) |
| 1130 |
stfd f12,56+16*4+12*8(r1) |
| 1131 |
stfd f13,56+16*4+13*8(r1) |
| 1132 |
stfd f0,56+16*4+14*8(r1) |
| 1133 |
|
| 1134 |
// Execute native routine |
| 1135 |
addi r3,r1,56 |
| 1136 |
mr r4,r24 |
| 1137 |
bl EmulOp |
| 1138 |
|
| 1139 |
// Restore 68k registers |
| 1140 |
lwz r8,56+M68kRegisters.d[0](r1) |
| 1141 |
lwz r9,56+M68kRegisters.d[1](r1) |
| 1142 |
lwz r10,56+M68kRegisters.d[2](r1) |
| 1143 |
lwz r11,56+M68kRegisters.d[3](r1) |
| 1144 |
lwz r12,56+M68kRegisters.d[4](r1) |
| 1145 |
lwz r13,56+M68kRegisters.d[5](r1) |
| 1146 |
lwz r14,56+M68kRegisters.d[6](r1) |
| 1147 |
lwz r15,56+M68kRegisters.d[7](r1) |
| 1148 |
lwz r16,56+M68kRegisters.a[0](r1) |
| 1149 |
lwz r17,56+M68kRegisters.a[1](r1) |
| 1150 |
lwz r18,56+M68kRegisters.a[2](r1) |
| 1151 |
lwz r19,56+M68kRegisters.a[3](r1) |
| 1152 |
lwz r20,56+M68kRegisters.a[4](r1) |
| 1153 |
lwz r21,56+M68kRegisters.a[5](r1) |
| 1154 |
lwz r22,56+M68kRegisters.a[6](r1) |
| 1155 |
lwz r3,56+M68kRegisters.a[7](r1) |
| 1156 |
lfd f13,56+16*4+14*8(r1) |
| 1157 |
lfd f0,56+16*4+0*8(r1) |
| 1158 |
lfd f1,56+16*4+1*8(r1) |
| 1159 |
lfd f2,56+16*4+2*8(r1) |
| 1160 |
lfd f3,56+16*4+3*8(r1) |
| 1161 |
lfd f4,56+16*4+4*8(r1) |
| 1162 |
lfd f5,56+16*4+5*8(r1) |
| 1163 |
lfd f6,56+16*4+6*8(r1) |
| 1164 |
lfd f7,56+16*4+7*8(r1) |
| 1165 |
mtfsf 0xff,f13 |
| 1166 |
lfd f8,56+16*4+8*8(r1) |
| 1167 |
lfd f9,56+16*4+9*8(r1) |
| 1168 |
lfd f10,56+16*4+10*8(r1) |
| 1169 |
lfd f11,56+16*4+11*8(r1) |
| 1170 |
lfd f12,56+16*4+12*8(r1) |
| 1171 |
lfd f13,56+16*4+13*8(r1) |
| 1172 |
|
| 1173 |
// Delete PowerPC stack frame |
| 1174 |
lwz r2,56+16*4+15*8+12(r1) |
| 1175 |
lwz r0,56+16*4+15*8+16(r1) |
| 1176 |
mtxer r0 |
| 1177 |
lwz r0,56+16*4+15*8+4(r1) |
| 1178 |
mtcrf 0xff,r0 |
| 1179 |
mr r1,r3 |
| 1180 |
|
| 1181 |
// Reeintering 68k emulator |
| 1182 |
li r0,MODE_68K |
| 1183 |
stw r0,XLM_RUN_MODE |
| 1184 |
|
| 1185 |
// Set r0 to 0 for 68k emulator |
| 1186 |
li r0,0 |
| 1187 |
|
| 1188 |
// Execute next 68k opcode |
| 1189 |
rlwimi r29,r27,3,13,28 |
| 1190 |
lhau r27,2(r24) |
| 1191 |
mtlr r29 |
| 1192 |
blr |
| 1193 |
|
| 1194 |
|
| 1195 |
// Save address of EMUL_BREAK/EMUL_OP routine for 68k emulator patch |
| 1196 |
@3 mflr r0 |
| 1197 |
stw r0,XLM_EMUL_OP_PROC |
| 1198 |
|
| 1199 |
// Save stack pointer for EMUL_RETURN |
| 1200 |
stw r1,XLM_EMUL_RETURN_STACK |
| 1201 |
|
| 1202 |
// Preset registers for ROM boot routine |
| 1203 |
lis r3,0x40b0 // Pointer to ROM boot structure |
| 1204 |
ori r3,r3,0xd000 |
| 1205 |
|
| 1206 |
// 68k emulator is now active |
| 1207 |
li r0,MODE_68K |
| 1208 |
stw r0,XLM_RUN_MODE |
| 1209 |
|
| 1210 |
// Jump to ROM |
| 1211 |
bctr |
| 1212 |
} |
| 1213 |
#endif |
| 1214 |
|
| 1215 |
|
| 1216 |
#if !EMULATED_PPC |
| 1217 |
/* |
| 1218 |
* Execute 68k subroutine (must be ended with RTS) |
| 1219 |
* This must only be called by the emul_thread when in EMUL_OP mode |
| 1220 |
* r->a[7] is unused, the routine runs on the caller's stack |
| 1221 |
*/ |
| 1222 |
|
| 1223 |
#if SAFE_EXEC_68K |
| 1224 |
void execute_68k(uint32 pc, M68kRegisters *r); |
| 1225 |
|
| 1226 |
void Execute68k(uint32 pc, M68kRegisters *r) |
| 1227 |
{ |
| 1228 |
if (*(uint32 *)XLM_RUN_MODE != MODE_EMUL_OP) |
| 1229 |
printf("FATAL: Execute68k() not called from EMUL_OP mode\n"); |
| 1230 |
if (find_thread(NULL) != the_app->emul_thread) |
| 1231 |
printf("FATAL: Execute68k() not called from emul_thread\n"); |
| 1232 |
execute_68k(pc, r); |
| 1233 |
} |
| 1234 |
|
| 1235 |
asm void execute_68k(register uint32 pc, register M68kRegisters *r) |
| 1236 |
#else |
| 1237 |
asm void Execute68k(register uint32 pc, register M68kRegisters *r) |
| 1238 |
#endif |
| 1239 |
{ |
| 1240 |
// Create stack frame |
| 1241 |
mflr r0 |
| 1242 |
stw r0,8(r1) |
| 1243 |
stw r4,12(r1) |
| 1244 |
stwu r1,-(56+19*4+18*8)(r1) |
| 1245 |
|
| 1246 |
// Save PowerPC registers |
| 1247 |
stmw r13,56(r1) |
| 1248 |
#if SAVE_FP_EXEC_68K |
| 1249 |
stfd f14,56+19*4+0*8(r1) |
| 1250 |
stfd f15,56+19*4+1*8(r1) |
| 1251 |
stfd f16,56+19*4+2*8(r1) |
| 1252 |
stfd f17,56+19*4+3*8(r1) |
| 1253 |
stfd f18,56+19*4+4*8(r1) |
| 1254 |
stfd f19,56+19*4+5*8(r1) |
| 1255 |
stfd f20,56+19*4+6*8(r1) |
| 1256 |
stfd f21,56+19*4+7*8(r1) |
| 1257 |
stfd f22,56+19*4+8*8(r1) |
| 1258 |
stfd f23,56+19*4+9*8(r1) |
| 1259 |
stfd f24,56+19*4+10*8(r1) |
| 1260 |
stfd f25,56+19*4+11*8(r1) |
| 1261 |
stfd f26,56+19*4+12*8(r1) |
| 1262 |
stfd f27,56+19*4+13*8(r1) |
| 1263 |
stfd f28,56+19*4+14*8(r1) |
| 1264 |
stfd f29,56+19*4+15*8(r1) |
| 1265 |
stfd f30,56+19*4+16*8(r1) |
| 1266 |
stfd f31,56+19*4+17*8(r1) |
| 1267 |
#endif |
| 1268 |
|
| 1269 |
// Set up registers for 68k emulator |
| 1270 |
lwz r31,XLM_KERNEL_DATA // Pointer to Kernel Data |
| 1271 |
addi r31,r31,0x1000 |
| 1272 |
li r0,0 |
| 1273 |
mtcrf 0xff,r0 |
| 1274 |
creqv 11,11,11 // Supervisor mode |
| 1275 |
lwz r8,M68kRegisters.d[0](r4) |
| 1276 |
lwz r9,M68kRegisters.d[1](r4) |
| 1277 |
lwz r10,M68kRegisters.d[2](r4) |
| 1278 |
lwz r11,M68kRegisters.d[3](r4) |
| 1279 |
lwz r12,M68kRegisters.d[4](r4) |
| 1280 |
lwz r13,M68kRegisters.d[5](r4) |
| 1281 |
lwz r14,M68kRegisters.d[6](r4) |
| 1282 |
lwz r15,M68kRegisters.d[7](r4) |
| 1283 |
lwz r16,M68kRegisters.a[0](r4) |
| 1284 |
lwz r17,M68kRegisters.a[1](r4) |
| 1285 |
lwz r18,M68kRegisters.a[2](r4) |
| 1286 |
lwz r19,M68kRegisters.a[3](r4) |
| 1287 |
lwz r20,M68kRegisters.a[4](r4) |
| 1288 |
lwz r21,M68kRegisters.a[5](r4) |
| 1289 |
lwz r22,M68kRegisters.a[6](r4) |
| 1290 |
li r23,0 |
| 1291 |
mr r24,r3 |
| 1292 |
lwz r25,XLM_68K_R25 // MSB of SR |
| 1293 |
li r26,0 |
| 1294 |
li r28,0 // VBR |
| 1295 |
lwz r29,0x74(r31) // Pointer to opcode table |
| 1296 |
lwz r30,0x78(r31) // Address of emulator |
| 1297 |
|
| 1298 |
// Push return address (points to EXEC_RETURN opcode) on stack |
| 1299 |
li r0,XLM_EXEC_RETURN_OPCODE |
| 1300 |
stwu r0,-4(r1) |
| 1301 |
|
| 1302 |
// Reentering 68k emulator |
| 1303 |
li r0,MODE_68K |
| 1304 |
stw r0,XLM_RUN_MODE |
| 1305 |
|
| 1306 |
// Set r0 to 0 for 68k emulator |
| 1307 |
li r0,0 |
| 1308 |
|
| 1309 |
// Execute 68k opcode |
| 1310 |
lha r27,0(r24) |
| 1311 |
rlwimi r29,r27,3,13,28 |
| 1312 |
lhau r27,2(r24) |
| 1313 |
mtlr r29 |
| 1314 |
blr |
| 1315 |
} |
| 1316 |
|
| 1317 |
|
| 1318 |
/* |
| 1319 |
* Execute 68k A-Trap from EMUL_OP routine |
| 1320 |
* r->a[7] is unused, the routine runs on the caller's stack |
| 1321 |
*/ |
| 1322 |
|
| 1323 |
void Execute68kTrap(uint16 trap, M68kRegisters *r) |
| 1324 |
{ |
| 1325 |
uint16 proc[2] = {trap, M68K_RTS}; |
| 1326 |
Execute68k((uint32)proc, r); |
| 1327 |
} |
| 1328 |
|
| 1329 |
|
| 1330 |
/* |
| 1331 |
* Execute PPC code from EMUL_OP routine (real mode switch) |
| 1332 |
*/ |
| 1333 |
|
| 1334 |
void ExecutePPC(void (*func)()) |
| 1335 |
{ |
| 1336 |
RoutineDescriptor desc = BUILD_PPC_ROUTINE_DESCRIPTOR(0, func); |
| 1337 |
M68kRegisters r; |
| 1338 |
Execute68k((uint32)&desc, &r); |
| 1339 |
} |
| 1340 |
|
| 1341 |
|
| 1342 |
/* |
| 1343 |
* Quit emulator (must only be called from main thread) |
| 1344 |
*/ |
| 1345 |
|
| 1346 |
asm void QuitEmulator(void) |
| 1347 |
{ |
| 1348 |
lwz r0,XLM_EMUL_RETURN_PROC |
| 1349 |
mtlr r0 |
| 1350 |
blr |
| 1351 |
} |
| 1352 |
#endif |
| 1353 |
|
| 1354 |
|
| 1355 |
/* |
| 1356 |
* Dump 68k registers |
| 1357 |
*/ |
| 1358 |
|
| 1359 |
void Dump68kRegs(M68kRegisters *r) |
| 1360 |
{ |
| 1361 |
// Display 68k registers |
| 1362 |
for (int i=0; i<8; i++) { |
| 1363 |
printf("d%d: %08lx", i, r->d[i]); |
| 1364 |
if (i == 3 || i == 7) |
| 1365 |
printf("\n"); |
| 1366 |
else |
| 1367 |
printf(", "); |
| 1368 |
} |
| 1369 |
for (int i=0; i<8; i++) { |
| 1370 |
printf("a%d: %08lx", i, r->a[i]); |
| 1371 |
if (i == 3 || i == 7) |
| 1372 |
printf("\n"); |
| 1373 |
else |
| 1374 |
printf(", "); |
| 1375 |
} |
| 1376 |
} |
| 1377 |
|
| 1378 |
|
| 1379 |
/* |
| 1380 |
* Make code executable |
| 1381 |
*/ |
| 1382 |
|
| 1383 |
void MakeExecutable(int dummy, void *start, uint32 length) |
| 1384 |
{ |
| 1385 |
if (((uint32)start >= ROM_BASE) && ((uint32)start < (ROM_BASE + ROM_SIZE))) |
| 1386 |
return; |
| 1387 |
clear_caches(start, length, B_INVALIDATE_ICACHE | B_FLUSH_DCACHE); |
| 1388 |
} |
| 1389 |
|
| 1390 |
|
| 1391 |
/* |
| 1392 |
* Patch things after system startup (gets called by disk driver accRun routine) |
| 1393 |
*/ |
| 1394 |
|
| 1395 |
void PatchAfterStartup(void) |
| 1396 |
{ |
| 1397 |
ExecutePPC(VideoInstallAccel); |
| 1398 |
InstallExtFS(); |
| 1399 |
} |
| 1400 |
|
| 1401 |
|
| 1402 |
/* |
| 1403 |
* NVRAM watchdog thread (saves NVRAM every minute) |
| 1404 |
*/ |
| 1405 |
|
| 1406 |
static status_t SheepShaver::nvram_func(void *arg) |
| 1407 |
{ |
| 1408 |
SheepShaver *obj = (SheepShaver *)arg; |
| 1409 |
|
| 1410 |
while (obj->NVRAMThreadActive) { |
| 1411 |
snooze(60*1000000); |
| 1412 |
if (memcmp(obj->last_xpram, XPRAM, XPRAM_SIZE)) { |
| 1413 |
memcpy(obj->last_xpram, XPRAM, XPRAM_SIZE); |
| 1414 |
SaveXPRAM(); |
| 1415 |
} |
| 1416 |
} |
| 1417 |
return 0; |
| 1418 |
} |
| 1419 |
|
| 1420 |
|
| 1421 |
/* |
| 1422 |
* 60Hz thread (really 60.15Hz) |
| 1423 |
*/ |
| 1424 |
|
| 1425 |
status_t SheepShaver::tick_func(void *arg) |
| 1426 |
{ |
| 1427 |
SheepShaver *obj = (SheepShaver *)arg; |
| 1428 |
int tick_counter = 0; |
| 1429 |
bigtime_t current = system_time(); |
| 1430 |
|
| 1431 |
while (obj->TickThreadActive) { |
| 1432 |
|
| 1433 |
// Wait |
| 1434 |
current += 16625; |
| 1435 |
snooze_until(current, B_SYSTEM_TIMEBASE); |
| 1436 |
|
| 1437 |
// Pseudo Mac 1Hz interrupt, update local time |
| 1438 |
if (++tick_counter > 60) { |
| 1439 |
tick_counter = 0; |
| 1440 |
WriteMacInt32(0x20c, TimerDateTime()); |
| 1441 |
} |
| 1442 |
|
| 1443 |
// 60Hz interrupt |
| 1444 |
if (ReadMacInt32(XLM_IRQ_NEST) == 0) { |
| 1445 |
SetInterruptFlag(INTFLAG_VIA); |
| 1446 |
TriggerInterrupt(); |
| 1447 |
} |
| 1448 |
} |
| 1449 |
return 0; |
| 1450 |
} |
| 1451 |
|
| 1452 |
|
| 1453 |
/* |
| 1454 |
* Trigger signal USR1 from another thread |
| 1455 |
*/ |
| 1456 |
|
| 1457 |
void TriggerInterrupt(void) |
| 1458 |
{ |
| 1459 |
#if 0 |
| 1460 |
WriteMacInt32(0x16a, ReadMacInt32(0x16a) + 1); |
| 1461 |
#else |
| 1462 |
if (the_app->emul_thread > 0 && the_app->ReadyForSignals) |
| 1463 |
send_signal(the_app->emul_thread, SIGUSR1); |
| 1464 |
#endif |
| 1465 |
} |
| 1466 |
|
| 1467 |
|
| 1468 |
/* |
| 1469 |
* Mutexes |
| 1470 |
*/ |
| 1471 |
|
| 1472 |
struct B2_mutex { |
| 1473 |
int dummy; //!! |
| 1474 |
}; |
| 1475 |
|
| 1476 |
B2_mutex *B2_create_mutex(void) |
| 1477 |
{ |
| 1478 |
return new B2_mutex; |
| 1479 |
} |
| 1480 |
|
| 1481 |
void B2_lock_mutex(B2_mutex *mutex) |
| 1482 |
{ |
| 1483 |
} |
| 1484 |
|
| 1485 |
void B2_unlock_mutex(B2_mutex *mutex) |
| 1486 |
{ |
| 1487 |
} |
| 1488 |
|
| 1489 |
void B2_delete_mutex(B2_mutex *mutex) |
| 1490 |
{ |
| 1491 |
delete mutex; |
| 1492 |
} |
| 1493 |
|
| 1494 |
|
| 1495 |
/* |
| 1496 |
* Set/clear interrupt flags (must be done atomically!) |
| 1497 |
*/ |
| 1498 |
|
| 1499 |
volatile uint32 InterruptFlags = 0; |
| 1500 |
|
| 1501 |
void SetInterruptFlag(uint32 flag) |
| 1502 |
{ |
| 1503 |
atomic_or((int32 *)&InterruptFlags, flag); |
| 1504 |
} |
| 1505 |
|
| 1506 |
void ClearInterruptFlag(uint32 flag) |
| 1507 |
{ |
| 1508 |
atomic_and((int32 *)&InterruptFlags, ~flag); |
| 1509 |
} |
| 1510 |
|
| 1511 |
|
| 1512 |
/* |
| 1513 |
* Disable interrupts |
| 1514 |
*/ |
| 1515 |
|
| 1516 |
void DisableInterrupt(void) |
| 1517 |
{ |
| 1518 |
atomic_add((int32 *)XLM_IRQ_NEST, 1); |
| 1519 |
} |
| 1520 |
|
| 1521 |
|
| 1522 |
/* |
| 1523 |
* Enable interrupts |
| 1524 |
*/ |
| 1525 |
|
| 1526 |
void EnableInterrupt(void) |
| 1527 |
{ |
| 1528 |
atomic_add((int32 *)XLM_IRQ_NEST, -1); |
| 1529 |
} |
| 1530 |
|
| 1531 |
|
| 1532 |
/* |
| 1533 |
* USR1 handler |
| 1534 |
*/ |
| 1535 |
|
| 1536 |
void SheepShaver::sigusr1_invoc(int sig, void *arg, vregs *r) |
| 1537 |
{ |
| 1538 |
((SheepShaver *)arg)->sigusr1_handler(r); |
| 1539 |
} |
| 1540 |
|
| 1541 |
#if !EMULATED_PPC |
| 1542 |
static asm void ppc_interrupt(register uint32 entry) |
| 1543 |
{ |
| 1544 |
fralloc |
| 1545 |
|
| 1546 |
// Get address of return routine |
| 1547 |
bl @1 |
| 1548 |
|
| 1549 |
// Return routine |
| 1550 |
frfree |
| 1551 |
blr |
| 1552 |
|
| 1553 |
@1 |
| 1554 |
// Prepare registers for nanokernel interrupt routine |
| 1555 |
mtctr r1 |
| 1556 |
lwz r1,XLM_KERNEL_DATA |
| 1557 |
stw r6,0x018(r1) |
| 1558 |
mfctr r6 |
| 1559 |
stw r6,0x004(r1) |
| 1560 |
lwz r6,0x65c(r1) |
| 1561 |
stw r7,0x13c(r6) |
| 1562 |
stw r8,0x144(r6) |
| 1563 |
stw r9,0x14c(r6) |
| 1564 |
stw r10,0x154(r6) |
| 1565 |
stw r11,0x15c(r6) |
| 1566 |
stw r12,0x164(r6) |
| 1567 |
stw r13,0x16c(r6) |
| 1568 |
|
| 1569 |
mflr r10 |
| 1570 |
mfcr r13 |
| 1571 |
lwz r7,0x660(r1) |
| 1572 |
mflr r12 |
| 1573 |
rlwimi. r7,r7,8,0,0 |
| 1574 |
li r11,0 |
| 1575 |
ori r11,r11,0xf072 // MSR (SRR1) |
| 1576 |
mtcrf 0x70,r11 |
| 1577 |
li r8,0 |
| 1578 |
|
| 1579 |
// Enter nanokernel |
| 1580 |
mtlr r3 |
| 1581 |
blr |
| 1582 |
} |
| 1583 |
#endif |
| 1584 |
|
| 1585 |
void SheepShaver::sigusr1_handler(vregs *r) |
| 1586 |
{ |
| 1587 |
// Do nothing if interrupts are disabled |
| 1588 |
if ((*(int32 *)XLM_IRQ_NEST) > 0) |
| 1589 |
return; |
| 1590 |
|
| 1591 |
// Interrupt action depends on current run mode |
| 1592 |
switch (*(uint32 *)XLM_RUN_MODE) { |
| 1593 |
case MODE_68K: |
| 1594 |
// 68k emulator active, trigger 68k interrupt level 1 |
| 1595 |
*(uint16 *)(kernel_data->v[0x67c >> 2]) = 1; |
| 1596 |
r->cr |= kernel_data->v[0x674 >> 2]; |
| 1597 |
break; |
| 1598 |
|
| 1599 |
#if INTERRUPTS_IN_NATIVE_MODE |
| 1600 |
case MODE_NATIVE: |
| 1601 |
// 68k emulator inactive, in nanokernel? |
| 1602 |
if (r->r1 != KernelDataAddr) { |
| 1603 |
// No, prepare for 68k interrupt level 1 |
| 1604 |
*(uint16 *)(kernel_data->v[0x67c >> 2]) = 1; |
| 1605 |
*(uint32 *)(kernel_data->v[0x658 >> 2] + 0xdc) |= kernel_data->v[0x674 >> 2]; |
| 1606 |
|
| 1607 |
// Execute nanokernel interrupt routine (this will activate the 68k emulator) |
| 1608 |
atomic_add((int32 *)XLM_IRQ_NEST, 1); |
| 1609 |
if (ROMType == ROMTYPE_NEWWORLD) |
| 1610 |
ppc_interrupt(ROM_BASE + 0x312b1c); |
| 1611 |
else |
| 1612 |
ppc_interrupt(ROM_BASE + 0x312a3c); |
| 1613 |
} |
| 1614 |
break; |
| 1615 |
#endif |
| 1616 |
|
| 1617 |
#if INTERRUPTS_IN_EMUL_OP_MODE |
| 1618 |
case MODE_EMUL_OP: |
| 1619 |
// 68k emulator active, within EMUL_OP routine, execute 68k interrupt routine directly when interrupt level is 0 |
| 1620 |
if ((*(uint32 *)XLM_68K_R25 & 7) == 0) { |
| 1621 |
|
| 1622 |
// Set extra stack for SIGSEGV handler |
| 1623 |
set_signal_stack(extra_stack, SIG_STACK_SIZE); |
| 1624 |
#if 1 |
| 1625 |
// Execute full 68k interrupt routine |
| 1626 |
M68kRegisters r; |
| 1627 |
uint32 old_r25 = *(uint32 *)XLM_68K_R25; // Save interrupt level |
| 1628 |
*(uint32 *)XLM_68K_R25 = 0x21; // Execute with interrupt level 1 |
| 1629 |
static const uint16 proc[] = { |
| 1630 |
0x3f3c, 0x0000, // move.w #$0000,-(sp) (fake format word) |
| 1631 |
0x487a, 0x000a, // pea @1(pc) (return address) |
| 1632 |
0x40e7, // move sr,-(sp) (saved SR) |
| 1633 |
0x2078, 0x0064, // move.l $64,a0 |
| 1634 |
0x4ed0, // jmp (a0) |
| 1635 |
M68K_RTS // @1 |
| 1636 |
}; |
| 1637 |
Execute68k((uint32)proc, &r); |
| 1638 |
*(uint32 *)XLM_68K_R25 = old_r25; // Restore interrupt level |
| 1639 |
#else |
| 1640 |
// Only update cursor |
| 1641 |
if (HasMacStarted()) { |
| 1642 |
if (InterruptFlags & INTFLAG_VIA) { |
| 1643 |
ClearInterruptFlag(INTFLAG_VIA); |
| 1644 |
ADBInterrupt(); |
| 1645 |
ExecutePPC(VideoVBL); |
| 1646 |
} |
| 1647 |
} |
| 1648 |
#endif |
| 1649 |
// Reset normal signal stack |
| 1650 |
set_signal_stack(sig_stack, SIG_STACK_SIZE); |
| 1651 |
} |
| 1652 |
break; |
| 1653 |
#endif |
| 1654 |
} |
| 1655 |
} |
| 1656 |
|
| 1657 |
|
| 1658 |
/* |
| 1659 |
* SIGSEGV handler |
| 1660 |
*/ |
| 1661 |
|
| 1662 |
static uint32 segv_r[32]; |
| 1663 |
|
| 1664 |
#if !EMULATED_PPC |
| 1665 |
asm void SheepShaver::sigsegv_invoc(register int sig, register void *arg, register vregs *r) |
| 1666 |
{ |
| 1667 |
mflr r0 |
| 1668 |
stw r0,8(r1) |
| 1669 |
stwu r1,-56(r1) |
| 1670 |
|
| 1671 |
lwz r3,segv_r(r2) |
| 1672 |
stmw r13,13*4(r3) |
| 1673 |
|
| 1674 |
mr r3,r5 |
| 1675 |
bl sigsegv_handler |
| 1676 |
|
| 1677 |
lwz r3,segv_r(r2) |
| 1678 |
lmw r13,13*4(r3) |
| 1679 |
|
| 1680 |
lwz r0,56+8(r1) |
| 1681 |
mtlr r0 |
| 1682 |
addi r1,r1,56 |
| 1683 |
blr |
| 1684 |
} |
| 1685 |
#endif |
| 1686 |
|
| 1687 |
static void sigsegv_handler(vregs *r) |
| 1688 |
{ |
| 1689 |
char str[256]; |
| 1690 |
|
| 1691 |
// Fetch volatile registers |
| 1692 |
segv_r[0] = r->r0; |
| 1693 |
segv_r[1] = r->r1; |
| 1694 |
segv_r[2] = r->r2; |
| 1695 |
segv_r[3] = r->r3; |
| 1696 |
segv_r[4] = r->r4; |
| 1697 |
segv_r[5] = r->r5; |
| 1698 |
segv_r[6] = r->r6; |
| 1699 |
segv_r[7] = r->r7; |
| 1700 |
segv_r[8] = r->r8; |
| 1701 |
segv_r[9] = r->r9; |
| 1702 |
segv_r[10] = r->r10; |
| 1703 |
segv_r[11] = r->r11; |
| 1704 |
segv_r[12] = r->r12; |
| 1705 |
|
| 1706 |
// Get opcode and divide into fields |
| 1707 |
uint32 opcode = *(uint32 *)r->pc; |
| 1708 |
uint32 primop = opcode >> 26; |
| 1709 |
uint32 exop = (opcode >> 1) & 0x3ff; |
| 1710 |
uint32 ra = (opcode >> 16) & 0x1f; |
| 1711 |
uint32 rb = (opcode >> 11) & 0x1f; |
| 1712 |
uint32 rd = (opcode >> 21) & 0x1f; |
| 1713 |
uint32 imm = opcode & 0xffff; |
| 1714 |
|
| 1715 |
// Fault in Mac ROM or RAM? |
| 1716 |
bool mac_fault = (r->pc >= ROM_BASE) && (r->pc < (ROM_BASE + ROM_AREA_SIZE)) || (r->pc >= RAMBase) && (r->pc < (RAMBase + RAMSize)); |
| 1717 |
if (mac_fault) { |
| 1718 |
|
| 1719 |
// "VM settings" during MacOS 8 installation |
| 1720 |
if (r->pc == ROM_BASE + 0x488160 && segv_r[20] == 0xf8000000) { |
| 1721 |
r->pc += 4; |
| 1722 |
segv_r[8] = 0; |
| 1723 |
goto rti; |
| 1724 |
|
| 1725 |
// MacOS 8.5 installation |
| 1726 |
} else if (r->pc == ROM_BASE + 0x488140 && segv_r[16] == 0xf8000000) { |
| 1727 |
r->pc += 4; |
| 1728 |
segv_r[8] = 0; |
| 1729 |
goto rti; |
| 1730 |
|
| 1731 |
// MacOS 8 serial drivers on startup |
| 1732 |
} else if (r->pc == ROM_BASE + 0x48e080 && (segv_r[8] == 0xf3012002 || segv_r[8] == 0xf3012000)) { |
| 1733 |
r->pc += 4; |
| 1734 |
segv_r[8] = 0; |
| 1735 |
goto rti; |
| 1736 |
|
| 1737 |
// MacOS 8.1 serial drivers on startup |
| 1738 |
} else if (r->pc == ROM_BASE + 0x48c5e0 && (segv_r[20] == 0xf3012002 || segv_r[20] == 0xf3012000)) { |
| 1739 |
r->pc += 4; |
| 1740 |
goto rti; |
| 1741 |
} else if (r->pc == ROM_BASE + 0x4a10a0 && (segv_r[20] == 0xf3012002 || segv_r[20] == 0xf3012000)) { |
| 1742 |
r->pc += 4; |
| 1743 |
goto rti; |
| 1744 |
} |
| 1745 |
} |
| 1746 |
|
| 1747 |
// Analyze opcode |
| 1748 |
enum { |
| 1749 |
TYPE_UNKNOWN, |
| 1750 |
TYPE_LOAD, |
| 1751 |
TYPE_STORE |
| 1752 |
} transfer_type = TYPE_UNKNOWN; |
| 1753 |
enum { |
| 1754 |
SIZE_UNKNOWN, |
| 1755 |
SIZE_BYTE, |
| 1756 |
SIZE_HALFWORD, |
| 1757 |
SIZE_WORD |
| 1758 |
} transfer_size = SIZE_UNKNOWN; |
| 1759 |
enum { |
| 1760 |
MODE_UNKNOWN, |
| 1761 |
MODE_NORM, |
| 1762 |
MODE_U, |
| 1763 |
MODE_X, |
| 1764 |
MODE_UX |
| 1765 |
} addr_mode = MODE_UNKNOWN; |
| 1766 |
switch (primop) { |
| 1767 |
case 31: |
| 1768 |
switch (exop) { |
| 1769 |
case 23: // lwzx |
| 1770 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_WORD; addr_mode = MODE_X; break; |
| 1771 |
case 55: // lwzux |
| 1772 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_WORD; addr_mode = MODE_UX; break; |
| 1773 |
case 87: // lbzx |
| 1774 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_BYTE; addr_mode = MODE_X; break; |
| 1775 |
case 119: // lbzux |
| 1776 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_BYTE; addr_mode = MODE_UX; break; |
| 1777 |
case 151: // stwx |
| 1778 |
transfer_type = TYPE_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_X; break; |
| 1779 |
case 183: // stwux |
| 1780 |
transfer_type = TYPE_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_UX; break; |
| 1781 |
case 215: // stbx |
| 1782 |
transfer_type = TYPE_STORE; transfer_size = SIZE_BYTE; addr_mode = MODE_X; break; |
| 1783 |
case 247: // stbux |
| 1784 |
transfer_type = TYPE_STORE; transfer_size = SIZE_BYTE; addr_mode = MODE_UX; break; |
| 1785 |
case 279: // lhzx |
| 1786 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_X; break; |
| 1787 |
case 311: // lhzux |
| 1788 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_UX; break; |
| 1789 |
case 343: // lhax |
| 1790 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_X; break; |
| 1791 |
case 375: // lhaux |
| 1792 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_UX; break; |
| 1793 |
case 407: // sthx |
| 1794 |
transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_X; break; |
| 1795 |
case 439: // sthux |
| 1796 |
transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_UX; break; |
| 1797 |
} |
| 1798 |
break; |
| 1799 |
|
| 1800 |
case 32: // lwz |
| 1801 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_WORD; addr_mode = MODE_NORM; break; |
| 1802 |
case 33: // lwzu |
| 1803 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_WORD; addr_mode = MODE_U; break; |
| 1804 |
case 34: // lbz |
| 1805 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_BYTE; addr_mode = MODE_NORM; break; |
| 1806 |
case 35: // lbzu |
| 1807 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_BYTE; addr_mode = MODE_U; break; |
| 1808 |
case 36: // stw |
| 1809 |
transfer_type = TYPE_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_NORM; break; |
| 1810 |
case 37: // stwu |
| 1811 |
transfer_type = TYPE_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_U; break; |
| 1812 |
case 38: // stb |
| 1813 |
transfer_type = TYPE_STORE; transfer_size = SIZE_BYTE; addr_mode = MODE_NORM; break; |
| 1814 |
case 39: // stbu |
| 1815 |
transfer_type = TYPE_STORE; transfer_size = SIZE_BYTE; addr_mode = MODE_U; break; |
| 1816 |
case 40: // lhz |
| 1817 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_NORM; break; |
| 1818 |
case 41: // lhzu |
| 1819 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_U; break; |
| 1820 |
case 42: // lha |
| 1821 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_NORM; break; |
| 1822 |
case 43: // lhau |
| 1823 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_U; break; |
| 1824 |
case 44: // sth |
| 1825 |
transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_NORM; break; |
| 1826 |
case 45: // sthu |
| 1827 |
transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_U; break; |
| 1828 |
} |
| 1829 |
|
| 1830 |
// Calculate effective address |
| 1831 |
uint32 addr = 0; |
| 1832 |
switch (addr_mode) { |
| 1833 |
case MODE_X: |
| 1834 |
case MODE_UX: |
| 1835 |
if (ra == 0) |
| 1836 |
addr = segv_r[rb]; |
| 1837 |
else |
| 1838 |
addr = segv_r[ra] + segv_r[rb]; |
| 1839 |
break; |
| 1840 |
case MODE_NORM: |
| 1841 |
case MODE_U: |
| 1842 |
if (ra == 0) |
| 1843 |
addr = (int32)(int16)imm; |
| 1844 |
else |
| 1845 |
addr = segv_r[ra] + (int32)(int16)imm; |
| 1846 |
break; |
| 1847 |
default: |
| 1848 |
break; |
| 1849 |
} |
| 1850 |
|
| 1851 |
// Ignore ROM writes |
| 1852 |
if (transfer_type == TYPE_STORE && addr >= ROM_BASE && addr < ROM_BASE + ROM_SIZE) { |
| 1853 |
D(bug("WARNING: %s write access to ROM at %p, pc %p\n", transfer_size == SIZE_BYTE ? "Byte" : transfer_size == SIZE_HALFWORD ? "Halfword" : "Word", addr, r->pc)); |
| 1854 |
if (addr_mode == MODE_U || addr_mode == MODE_UX) |
| 1855 |
segv_r[ra] = addr; |
| 1856 |
r->pc += 4; |
| 1857 |
goto rti; |
| 1858 |
} |
| 1859 |
|
| 1860 |
// Fault in Mac ROM or RAM? |
| 1861 |
if (mac_fault) { |
| 1862 |
|
| 1863 |
// Ignore illegal memory accesses? |
| 1864 |
if (PrefsFindBool("ignoresegv")) { |
| 1865 |
if (addr_mode == MODE_U || addr_mode == MODE_UX) |
| 1866 |
segv_r[ra] = addr; |
| 1867 |
if (transfer_type == TYPE_LOAD) |
| 1868 |
segv_r[rd] = 0; |
| 1869 |
r->pc += 4; |
| 1870 |
goto rti; |
| 1871 |
} |
| 1872 |
|
| 1873 |
// In GUI mode, show error alert |
| 1874 |
if (!PrefsFindBool("nogui")) { |
| 1875 |
if (transfer_type == TYPE_LOAD || transfer_type == TYPE_STORE) |
| 1876 |
sprintf(str, GetString(STR_MEM_ACCESS_ERR), transfer_size == SIZE_BYTE ? "byte" : transfer_size == SIZE_HALFWORD ? "halfword" : "word", transfer_type == TYPE_LOAD ? GetString(STR_MEM_ACCESS_READ) : GetString(STR_MEM_ACCESS_WRITE), addr, r->pc, segv_r[24], segv_r[1]); |
| 1877 |
else |
| 1878 |
sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->pc, segv_r[24], segv_r[1], opcode); |
| 1879 |
ErrorAlert(str); |
| 1880 |
QuitEmulator(); |
| 1881 |
return; |
| 1882 |
} |
| 1883 |
} |
| 1884 |
|
| 1885 |
// For all other errors, jump into debugger |
| 1886 |
sprintf(str, "SIGSEGV\n" |
| 1887 |
" pc %08lx lr %08lx ctr %08lx msr %08lx\n" |
| 1888 |
" xer %08lx cr %08lx fpscr %08lx\n" |
| 1889 |
" r0 %08lx r1 %08lx r2 %08lx r3 %08lx\n" |
| 1890 |
" r4 %08lx r5 %08lx r6 %08lx r7 %08lx\n" |
| 1891 |
" r8 %08lx r9 %08lx r10 %08lx r11 %08lx\n" |
| 1892 |
" r12 %08lx r13 %08lx r14 %08lx r15 %08lx\n" |
| 1893 |
" r16 %08lx r17 %08lx r18 %08lx r19 %08lx\n" |
| 1894 |
" r20 %08lx r21 %08lx r22 %08lx r23 %08lx\n" |
| 1895 |
" r24 %08lx r25 %08lx r26 %08lx r27 %08lx\n" |
| 1896 |
" r28 %08lx r29 %08lx r30 %08lx r31 %08lx\n", |
| 1897 |
r->pc, r->lr, r->ctr, r->msr, |
| 1898 |
r->xer, r->cr, r->fpscr, |
| 1899 |
r->r0, r->r1, r->r2, r->r3, |
| 1900 |
r->r4, r->r5, r->r6, r->r7, |
| 1901 |
r->r8, r->r9, r->r10, r->r11, |
| 1902 |
r->r12, segv_r[13], segv_r[14], segv_r[15], |
| 1903 |
segv_r[16], segv_r[17], segv_r[18], segv_r[19], |
| 1904 |
segv_r[20], segv_r[21], segv_r[22], segv_r[23], |
| 1905 |
segv_r[24], segv_r[25], segv_r[26], segv_r[27], |
| 1906 |
segv_r[28], segv_r[29], segv_r[30], segv_r[31]); |
| 1907 |
VideoQuitFullScreen(); |
| 1908 |
disable_debugger(false); |
| 1909 |
debugger(str); |
| 1910 |
exit(1); |
| 1911 |
return; |
| 1912 |
|
| 1913 |
rti: |
| 1914 |
// Restore volatile registers |
| 1915 |
r->r0 = segv_r[0]; |
| 1916 |
r->r1 = segv_r[1]; |
| 1917 |
r->r2 = segv_r[2]; |
| 1918 |
r->r3 = segv_r[3]; |
| 1919 |
r->r4 = segv_r[4]; |
| 1920 |
r->r5 = segv_r[5]; |
| 1921 |
r->r6 = segv_r[6]; |
| 1922 |
r->r7 = segv_r[7]; |
| 1923 |
r->r8 = segv_r[8]; |
| 1924 |
r->r9 = segv_r[9]; |
| 1925 |
r->r10 = segv_r[10]; |
| 1926 |
r->r11 = segv_r[11]; |
| 1927 |
r->r12 = segv_r[12]; |
| 1928 |
} |
| 1929 |
|
| 1930 |
|
| 1931 |
/* |
| 1932 |
* SIGILL handler |
| 1933 |
*/ |
| 1934 |
|
| 1935 |
#if !EMULATED_PPC |
| 1936 |
asm void SheepShaver::sigill_invoc(register int sig, register void *arg, register vregs *r) |
| 1937 |
{ |
| 1938 |
mflr r0 |
| 1939 |
stw r0,8(r1) |
| 1940 |
stwu r1,-56(r1) |
| 1941 |
|
| 1942 |
lwz r3,segv_r(r2) |
| 1943 |
stmw r13,13*4(r3) |
| 1944 |
|
| 1945 |
mr r3,r5 |
| 1946 |
bl sigill_handler |
| 1947 |
|
| 1948 |
lwz r3,segv_r(r2) |
| 1949 |
lmw r13,13*4(r3) |
| 1950 |
|
| 1951 |
lwz r0,56+8(r1) |
| 1952 |
mtlr r0 |
| 1953 |
addi r1,r1,56 |
| 1954 |
blr |
| 1955 |
} |
| 1956 |
#endif |
| 1957 |
|
| 1958 |
static void sigill_handler(vregs *r) |
| 1959 |
{ |
| 1960 |
char str[256]; |
| 1961 |
|
| 1962 |
// Fetch volatile registers |
| 1963 |
segv_r[0] = r->r0; |
| 1964 |
segv_r[1] = r->r1; |
| 1965 |
segv_r[2] = r->r2; |
| 1966 |
segv_r[3] = r->r3; |
| 1967 |
segv_r[4] = r->r4; |
| 1968 |
segv_r[5] = r->r5; |
| 1969 |
segv_r[6] = r->r6; |
| 1970 |
segv_r[7] = r->r7; |
| 1971 |
segv_r[8] = r->r8; |
| 1972 |
segv_r[9] = r->r9; |
| 1973 |
segv_r[10] = r->r10; |
| 1974 |
segv_r[11] = r->r11; |
| 1975 |
segv_r[12] = r->r12; |
| 1976 |
|
| 1977 |
// Get opcode and divide into fields |
| 1978 |
uint32 opcode = *(uint32 *)r->pc; |
| 1979 |
uint32 primop = opcode >> 26; |
| 1980 |
uint32 exop = (opcode >> 1) & 0x3ff; |
| 1981 |
uint32 ra = (opcode >> 16) & 0x1f; |
| 1982 |
uint32 rb = (opcode >> 11) & 0x1f; |
| 1983 |
uint32 rd = (opcode >> 21) & 0x1f; |
| 1984 |
uint32 imm = opcode & 0xffff; |
| 1985 |
|
| 1986 |
// Fault in Mac ROM or RAM? |
| 1987 |
bool mac_fault = (r->pc >= ROM_BASE) && (r->pc < (ROM_BASE + ROM_AREA_SIZE)) || (r->pc >= RAMBase) && (r->pc < (RAMBase + RAMSize)); |
| 1988 |
if (mac_fault) { |
| 1989 |
|
| 1990 |
switch (primop) { |
| 1991 |
case 9: // POWER instructions |
| 1992 |
case 22: |
| 1993 |
power_inst: sprintf(str, GetString(STR_POWER_INSTRUCTION_ERR), r->pc, segv_r[1], opcode); |
| 1994 |
ErrorAlert(str); |
| 1995 |
QuitEmulator(); |
| 1996 |
return; |
| 1997 |
|
| 1998 |
case 31: |
| 1999 |
switch (exop) { |
| 2000 |
case 83: // mfmsr |
| 2001 |
segv_r[rd] = 0xf072; |
| 2002 |
r->pc += 4; |
| 2003 |
goto rti; |
| 2004 |
|
| 2005 |
case 210: // mtsr |
| 2006 |
case 242: // mtsrin |
| 2007 |
case 306: // tlbie |
| 2008 |
r->pc += 4; |
| 2009 |
goto rti; |
| 2010 |
|
| 2011 |
case 339: { // mfspr |
| 2012 |
int spr = ra | (rb << 5); |
| 2013 |
switch (spr) { |
| 2014 |
case 0: // MQ |
| 2015 |
case 22: // DEC |
| 2016 |
case 952: // MMCR0 |
| 2017 |
case 953: // PMC1 |
| 2018 |
case 954: // PMC2 |
| 2019 |
case 955: // SIA |
| 2020 |
case 956: // MMCR1 |
| 2021 |
case 957: // PMC3 |
| 2022 |
case 958: // PMC4 |
| 2023 |
case 959: // SDA |
| 2024 |
r->pc += 4; |
| 2025 |
goto rti; |
| 2026 |
case 25: // SDR1 |
| 2027 |
segv_r[rd] = 0xdead001f; |
| 2028 |
r->pc += 4; |
| 2029 |
goto rti; |
| 2030 |
case 287: // PVR |
| 2031 |
segv_r[rd] = PVR; |
| 2032 |
r->pc += 4; |
| 2033 |
goto rti; |
| 2034 |
} |
| 2035 |
break; |
| 2036 |
} |
| 2037 |
|
| 2038 |
case 467: { // mtspr |
| 2039 |
int spr = ra | (rb << 5); |
| 2040 |
switch (spr) { |
| 2041 |
case 0: // MQ |
| 2042 |
case 22: // DEC |
| 2043 |
case 275: // SPRG3 |
| 2044 |
case 528: // IBAT0U |
| 2045 |
case 529: // IBAT0L |
| 2046 |
case 530: // IBAT1U |
| 2047 |
case 531: // IBAT1L |
| 2048 |
case 532: // IBAT2U |
| 2049 |
case 533: // IBAT2L |
| 2050 |
case 534: // IBAT3U |
| 2051 |
case 535: // IBAT3L |
| 2052 |
case 536: // DBAT0U |
| 2053 |
case 537: // DBAT0L |
| 2054 |
case 538: // DBAT1U |
| 2055 |
case 539: // DBAT1L |
| 2056 |
case 540: // DBAT2U |
| 2057 |
case 541: // DBAT2L |
| 2058 |
case 542: // DBAT3U |
| 2059 |
case 543: // DBAT3L |
| 2060 |
case 952: // MMCR0 |
| 2061 |
case 953: // PMC1 |
| 2062 |
case 954: // PMC2 |
| 2063 |
case 955: // SIA |
| 2064 |
case 956: // MMCR1 |
| 2065 |
case 957: // PMC3 |
| 2066 |
case 958: // PMC4 |
| 2067 |
case 959: // SDA |
| 2068 |
r->pc += 4; |
| 2069 |
goto rti; |
| 2070 |
} |
| 2071 |
break; |
| 2072 |
} |
| 2073 |
|
| 2074 |
case 29: case 107: case 152: case 153: // POWER instructions |
| 2075 |
case 184: case 216: case 217: case 248: |
| 2076 |
case 264: case 277: case 331: case 360: |
| 2077 |
case 363: case 488: case 531: case 537: |
| 2078 |
case 541: case 664: case 665: case 696: |
| 2079 |
case 728: case 729: case 760: case 920: |
| 2080 |
case 921: case 952: |
| 2081 |
goto power_inst; |
| 2082 |
} |
| 2083 |
} |
| 2084 |
|
| 2085 |
// In GUI mode, show error alert |
| 2086 |
if (!PrefsFindBool("nogui")) { |
| 2087 |
sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->pc, segv_r[24], segv_r[1], opcode); |
| 2088 |
ErrorAlert(str); |
| 2089 |
QuitEmulator(); |
| 2090 |
return; |
| 2091 |
} |
| 2092 |
} |
| 2093 |
|
| 2094 |
// For all other errors, jump into debugger |
| 2095 |
sprintf(str, "SIGILL\n" |
| 2096 |
" pc %08lx lr %08lx ctr %08lx msr %08lx\n" |
| 2097 |
" xer %08lx cr %08lx fpscr %08lx\n" |
| 2098 |
" r0 %08lx r1 %08lx r2 %08lx r3 %08lx\n" |
| 2099 |
" r4 %08lx r5 %08lx r6 %08lx r7 %08lx\n" |
| 2100 |
" r8 %08lx r9 %08lx r10 %08lx r11 %08lx\n" |
| 2101 |
" r12 %08lx r13 %08lx r14 %08lx r15 %08lx\n" |
| 2102 |
" r16 %08lx r17 %08lx r18 %08lx r19 %08lx\n" |
| 2103 |
" r20 %08lx r21 %08lx r22 %08lx r23 %08lx\n" |
| 2104 |
" r24 %08lx r25 %08lx r26 %08lx r27 %08lx\n" |
| 2105 |
" r28 %08lx r29 %08lx r30 %08lx r31 %08lx\n", |
| 2106 |
r->pc, r->lr, r->ctr, r->msr, |
| 2107 |
r->xer, r->cr, r->fpscr, |
| 2108 |
r->r0, r->r1, r->r2, r->r3, |
| 2109 |
r->r4, r->r5, r->r6, r->r7, |
| 2110 |
r->r8, r->r9, r->r10, r->r11, |
| 2111 |
r->r12, segv_r[13], segv_r[14], segv_r[15], |
| 2112 |
segv_r[16], segv_r[17], segv_r[18], segv_r[19], |
| 2113 |
segv_r[20], segv_r[21], segv_r[22], segv_r[23], |
| 2114 |
segv_r[24], segv_r[25], segv_r[26], segv_r[27], |
| 2115 |
segv_r[28], segv_r[29], segv_r[30], segv_r[31]); |
| 2116 |
VideoQuitFullScreen(); |
| 2117 |
disable_debugger(false); |
| 2118 |
debugger(str); |
| 2119 |
exit(1); |
| 2120 |
return; |
| 2121 |
|
| 2122 |
rti: |
| 2123 |
// Restore volatile registers |
| 2124 |
r->r0 = segv_r[0]; |
| 2125 |
r->r1 = segv_r[1]; |
| 2126 |
r->r2 = segv_r[2]; |
| 2127 |
r->r3 = segv_r[3]; |
| 2128 |
r->r4 = segv_r[4]; |
| 2129 |
r->r5 = segv_r[5]; |
| 2130 |
r->r6 = segv_r[6]; |
| 2131 |
r->r7 = segv_r[7]; |
| 2132 |
r->r8 = segv_r[8]; |
| 2133 |
r->r9 = segv_r[9]; |
| 2134 |
r->r10 = segv_r[10]; |
| 2135 |
r->r11 = segv_r[11]; |
| 2136 |
r->r12 = segv_r[12]; |
| 2137 |
} |
| 2138 |
|
| 2139 |
|
| 2140 |
/* |
| 2141 |
* Display error alert |
| 2142 |
*/ |
| 2143 |
|
| 2144 |
void ErrorAlert(const char *text) |
| 2145 |
{ |
| 2146 |
if (PrefsFindBool("nogui")) { |
| 2147 |
printf(GetString(STR_SHELL_ERROR_PREFIX), text); |
| 2148 |
return; |
| 2149 |
} |
| 2150 |
char str[256]; |
| 2151 |
sprintf(str, GetString(STR_GUI_ERROR_PREFIX), text); |
| 2152 |
VideoQuitFullScreen(); |
| 2153 |
BAlert *alert = new BAlert(GetString(STR_ERROR_ALERT_TITLE), str, GetString(STR_QUIT_BUTTON), NULL, NULL, B_WIDTH_AS_USUAL, B_STOP_ALERT); |
| 2154 |
alert->Go(); |
| 2155 |
} |
| 2156 |
|
| 2157 |
|
| 2158 |
/* |
| 2159 |
* Display warning alert |
| 2160 |
*/ |
| 2161 |
|
| 2162 |
void WarningAlert(const char *text) |
| 2163 |
{ |
| 2164 |
if (PrefsFindBool("nogui")) { |
| 2165 |
printf(GetString(STR_SHELL_WARNING_PREFIX), text); |
| 2166 |
return; |
| 2167 |
} |
| 2168 |
char str[256]; |
| 2169 |
sprintf(str, GetString(STR_GUI_WARNING_PREFIX), text); |
| 2170 |
BAlert *alert = new BAlert(GetString(STR_WARNING_ALERT_TITLE), str, GetString(STR_OK_BUTTON), NULL, NULL, B_WIDTH_AS_USUAL, B_INFO_ALERT); |
| 2171 |
alert->Go(); |
| 2172 |
} |
| 2173 |
|
| 2174 |
|
| 2175 |
/* |
| 2176 |
* Display choice alert |
| 2177 |
*/ |
| 2178 |
|
| 2179 |
bool ChoiceAlert(const char *text, const char *pos, const char *neg) |
| 2180 |
{ |
| 2181 |
char str[256]; |
| 2182 |
sprintf(str, GetString(STR_GUI_WARNING_PREFIX), text); |
| 2183 |
BAlert *alert = new BAlert(GetString(STR_WARNING_ALERT_TITLE), str, pos, neg, NULL, B_WIDTH_AS_USUAL, B_INFO_ALERT); |
| 2184 |
return alert->Go() == 0; |
| 2185 |
} |
