| 213 |
|
static sigregs sigsegv_regs; // Register dump when crashed |
| 214 |
|
#endif |
| 215 |
|
|
| 216 |
+ |
uintptr SheepMem::zero_page = 0; // Address of ro page filled in with zeros |
| 217 |
|
uintptr SheepMem::base = 0x60000000; // Address of SheepShaver data |
| 218 |
|
uintptr SheepMem::top = 0; // Top of SheepShaver data (stack like storage) |
| 219 |
|
|
| 673 |
|
WriteMacInt32(XLM_PVR, PVR); // Theoretical PVR |
| 674 |
|
WriteMacInt32(XLM_BUS_CLOCK, BusClockSpeed); // For DriverServicesLib patch |
| 675 |
|
WriteMacInt16(XLM_EXEC_RETURN_OPCODE, M68K_EXEC_RETURN); // For Execute68k() (RTS from the executed 68k code will jump here and end 68k mode) |
| 676 |
< |
#if EMULATED_PPC |
| 677 |
< |
WriteMacInt32(XLM_ETHER_INIT, NativeFunction(NATIVE_ETHER_INIT)); |
| 676 |
> |
WriteMacInt32(XLM_ZERO_PAGE, SheepMem::ZeroPage()); // Pointer to read-only page with all bits set to 0 |
| 677 |
> |
#if !EMULATED_PPC |
| 678 |
> |
WriteMacInt32(XLM_TOC, (uint32)TOC); // TOC pointer of emulator |
| 679 |
> |
#endif |
| 680 |
> |
WriteMacInt32(XLM_ETHER_INIT, NativeFunction(NATIVE_ETHER_INIT)); // DLPI ethernet driver functions |
| 681 |
|
WriteMacInt32(XLM_ETHER_TERM, NativeFunction(NATIVE_ETHER_TERM)); |
| 682 |
|
WriteMacInt32(XLM_ETHER_OPEN, NativeFunction(NATIVE_ETHER_OPEN)); |
| 683 |
|
WriteMacInt32(XLM_ETHER_CLOSE, NativeFunction(NATIVE_ETHER_CLOSE)); |
| 684 |
|
WriteMacInt32(XLM_ETHER_WPUT, NativeFunction(NATIVE_ETHER_WPUT)); |
| 685 |
|
WriteMacInt32(XLM_ETHER_RSRV, NativeFunction(NATIVE_ETHER_RSRV)); |
| 686 |
|
WriteMacInt32(XLM_VIDEO_DOIO, NativeFunction(NATIVE_VIDEO_DO_DRIVER_IO)); |
| 683 |
– |
#else |
| 684 |
– |
WriteMacInt32(XLM_TOC, (uint32)TOC); // TOC pointer of emulator |
| 685 |
– |
WriteMacInt32(XLM_ETHER_INIT, (uint32)InitStreamModule); // DLPI ethernet driver functions |
| 686 |
– |
WriteMacInt32(XLM_ETHER_TERM, (uint32)TerminateStreamModule); |
| 687 |
– |
WriteMacInt32(XLM_ETHER_OPEN, (uint32)ether_open); |
| 688 |
– |
WriteMacInt32(XLM_ETHER_CLOSE, (uint32)ether_close); |
| 689 |
– |
WriteMacInt32(XLM_ETHER_WPUT, (uint32)ether_wput); |
| 690 |
– |
WriteMacInt32(XLM_ETHER_RSRV, (uint32)ether_rsrv); |
| 691 |
– |
WriteMacInt32(XLM_VIDEO_DOIO, (uint32)VideoDoDriverIO); |
| 692 |
– |
#endif |
| 687 |
|
D(bug("Low Memory initialized\n")); |
| 688 |
|
|
| 689 |
|
// Start 60Hz thread |
| 952 |
|
uint16 proc[2] = {trap, M68K_RTS}; |
| 953 |
|
Execute68k((uint32)proc, r); |
| 954 |
|
} |
| 961 |
– |
|
| 962 |
– |
|
| 963 |
– |
/* |
| 964 |
– |
* Execute PPC code from EMUL_OP routine (real mode switch) |
| 965 |
– |
*/ |
| 966 |
– |
|
| 967 |
– |
void ExecutePPC(void (*func)()) |
| 968 |
– |
{ |
| 969 |
– |
uint32 tvect[2] = {(uint32)func, 0}; // Fake TVECT |
| 970 |
– |
SheepRoutineDescriptor desc(0, (uint32)tvect); |
| 971 |
– |
M68kRegisters r; |
| 972 |
– |
Execute68k(desc.addr(), &r); |
| 973 |
– |
} |
| 955 |
|
#endif |
| 956 |
|
|
| 957 |
|
|
| 1030 |
|
|
| 1031 |
|
void PatchAfterStartup(void) |
| 1032 |
|
{ |
| 1052 |
– |
#if EMULATED_PPC |
| 1033 |
|
ExecuteNative(NATIVE_VIDEO_INSTALL_ACCEL); |
| 1054 |
– |
#else |
| 1055 |
– |
ExecutePPC(VideoInstallAccel); |
| 1056 |
– |
#endif |
| 1034 |
|
InstallExtFS(); |
| 1035 |
|
} |
| 1036 |
|
|
| 1371 |
|
if (InterruptFlags & INTFLAG_VIA) { |
| 1372 |
|
ClearInterruptFlag(INTFLAG_VIA); |
| 1373 |
|
ADBInterrupt(); |
| 1374 |
< |
ExecutePPC(VideoVBL); |
| 1374 |
> |
ExecuteNative(NATIVE_VIDEO_VBL); |
| 1375 |
|
} |
| 1376 |
|
} |
| 1377 |
|
#endif |
| 1775 |
|
{ |
| 1776 |
|
if (vm_acquire_fixed((char *)base, size) < 0) |
| 1777 |
|
return false; |
| 1778 |
+ |
|
| 1779 |
+ |
zero_page = base + size; |
| 1780 |
+ |
|
| 1781 |
+ |
int page_size = getpagesize(); |
| 1782 |
+ |
if (vm_acquire_fixed((char *)zero_page, page_size) < 0) |
| 1783 |
+ |
return false; |
| 1784 |
+ |
memset((char *)zero_page, 0, page_size); |
| 1785 |
+ |
if (vm_protect((char *)zero_page, page_size, VM_PAGE_READ) < 0) |
| 1786 |
+ |
return false; |
| 1787 |
+ |
|
| 1788 |
|
top = base + size; |
| 1789 |
|
return true; |
| 1790 |
|
} |
| 1791 |
|
|
| 1792 |
|
void SheepMem::Exit(void) |
| 1793 |
|
{ |
| 1794 |
< |
if (top) |
| 1795 |
< |
vm_release((void *)base, size); |
| 1794 |
> |
if (top) { |
| 1795 |
> |
// The zero page is next to SheepShaver globals |
| 1796 |
> |
vm_release((void *)base, size + getpagesize()); |
| 1797 |
> |
} |
| 1798 |
|
} |
| 1799 |
|
|
| 1800 |
|
|
