| 220 |
|
|
| 221 |
|
static void *sig_stack = NULL; // Stack for signal handlers |
| 222 |
|
static void *extra_stack = NULL; // Stack for SIGSEGV inside interrupt handler |
| 223 |
< |
static uintptr SheepMem::base; // Address of SheepShaver data |
| 224 |
< |
static uintptr SheepMem::top; // Top of SheepShaver data (stack like storage) |
| 223 |
> |
uintptr SheepMem::zero_page = 0; // Address of ro page filled in with zeros |
| 224 |
> |
uintptr SheepMem::base; // Address of SheepShaver data |
| 225 |
> |
uintptr SheepMem::top; // Top of SheepShaver data (stack like storage) |
| 226 |
|
static area_id SheepMemArea; // SheepShaver data area ID |
| 227 |
|
|
| 228 |
|
|
| 579 |
|
WriteMacInt32(XLM_PVR, PVR); // Theoretical PVR |
| 580 |
|
WriteMacInt32(XLM_BUS_CLOCK, BusClockSpeed); // For DriverServicesLib patch |
| 581 |
|
WriteMacInt16(XLM_EXEC_RETURN_OPCODE, M68K_EXEC_RETURN); // For Execute68k() (RTS from the executed 68k code will jump here and end 68k mode) |
| 582 |
+ |
WriteMacInt32(XLM_ZERO_PAGE, SheepMem::ZeroPage()); // Pointer to read-only page with all bits set to 0 |
| 583 |
|
#if !EMULATED_PPC |
| 584 |
|
WriteMacInt32(XLM_TOC, (uint32)TOC); // TOC pointer of emulator |
| 585 |
|
WriteMacInt32(XLM_ETHER_INIT, *(uint32 *)InitStreamModule); // DLPI ethernet driver functions |
| 1267 |
|
|
| 1268 |
|
|
| 1269 |
|
/* |
| 1268 |
– |
* Execute PPC code from EMUL_OP routine (real mode switch) |
| 1269 |
– |
*/ |
| 1270 |
– |
|
| 1271 |
– |
void ExecutePPC(void (*func)()) |
| 1272 |
– |
{ |
| 1273 |
– |
SheepRoutineDescriptor desc(0, (uint32)func); |
| 1274 |
– |
M68kRegisters r; |
| 1275 |
– |
Execute68k((uint32)&desc, &r); |
| 1276 |
– |
} |
| 1277 |
– |
|
| 1278 |
– |
|
| 1279 |
– |
/* |
| 1270 |
|
* Quit emulator (must only be called from main thread) |
| 1271 |
|
*/ |
| 1272 |
|
|
| 1321 |
|
|
| 1322 |
|
void PatchAfterStartup(void) |
| 1323 |
|
{ |
| 1324 |
< |
ExecutePPC(VideoInstallAccel); |
| 1324 |
> |
ExecuteNative(NATIVE_VIDEO_INSTALL_ACCEL); |
| 1325 |
|
InstallExtFS(); |
| 1326 |
|
} |
| 1327 |
|
|
| 1569 |
|
if (InterruptFlags & INTFLAG_VIA) { |
| 1570 |
|
ClearInterruptFlag(INTFLAG_VIA); |
| 1571 |
|
ADBInterrupt(); |
| 1572 |
< |
ExecutePPC(VideoVBL); |
| 1572 |
> |
ExecuteNative(NATIVE_VIDEO_VBL); |
| 1573 |
|
} |
| 1574 |
|
} |
| 1575 |
|
#endif |
| 2081 |
|
if (SheepMemArea < 0) |
| 2082 |
|
return false; |
| 2083 |
|
|
| 2084 |
+ |
// Create read-only area with all bits set to 0 |
| 2085 |
+ |
static const uint8 const_zero_page[4096] = {0,}; |
| 2086 |
+ |
zero_page = const_zero_page; |
| 2087 |
+ |
|
| 2088 |
|
D(bug("SheepShaver area %ld at %p\n", SheepMemArea, base)); |
| 2089 |
|
top = base + size; |
| 2090 |
|
return true; |
