piwalker/melonDS
1
0
Fork 0
mirror of https://github.com/melonDS-emu/melonDS.git synced 2024-11-14 21:37:42 -07:00
Code Issues Actions Packages Projects Releases Wiki Activity

more complete (and accurate) CP15 setup for direct boot

Browse Source
This commit is contained in:
Arisotura 2021-10-28 21:15:12 +02:00
parent bfe50e41b4
commit e121953c9a
5 changed files with 72 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
src/ARM.cpp
View File

@ -162,6 +162,8 @@ void ARMv5::Reset()
GetMemRegion = NDS::ARM9GetMemRegion;
}
//PU_Map = PU_PrivMap;
ARM::Reset();
}
@ -225,10 +227,22 @@ void ARM::DoSavestate(Savestate* file)
if (!file->Saving)
{
CPSR |= 0x00000010;
R_FIQ[7] |= 0x00000010;
R_SVC[2] |= 0x00000010;
R_ABT[2] |= 0x00000010;
R_IRQ[2] |= 0x00000010;
R_UND[2] |= 0x00000010;
if (!Num)
{
SetupCodeMem(R[15]); // should fix it
((ARMv5*)this)->RegionCodeCycles = ((ARMv5*)this)->MemTimings[R[15] >> 12][0];
/*if ((CPSR & 0x1F) == 0x10)
((ARMv5*)this)->PU_Map = ((ARMv5*)this)->PU_UserMap;
else
((ARMv5*)this)->PU_Map = ((ARMv5*)this)->PU_PrivMap;*/
}
else
{
@ -415,7 +429,7 @@ void ARM::RestoreCPSR()
UpdateMode(oldcpsr, CPSR);
}
void ARM::UpdateMode(u32 oldmode, u32 newmode)
void ARM::UpdateMode(u32 oldmode, u32 newmode, bool phony)
{
if ((oldmode & 0x1F) == (newmode & 0x1F)) return;
@ -485,13 +499,12 @@ void ARM::UpdateMode(u32 oldmode, u32 newmode)
break;
}
if (Num == 0)
if ((!phony) && (Num == 0))
{
/*if ((newmode & 0x1F) == 0x10)
((ARMv5*)this)->PU_Map = ((ARMv5*)this)->PU_UserMap;
else
((ARMv5*)this)->PU_Map = ((ARMv5*)this)->PU_PrivMap;*/
//if ((newmode & 0x1F) == 0x10) printf("!! USER MODE\n");
}
}

3
src/ARM.h
View File

@ -93,7 +93,7 @@ public:
if (v) CPSR |= 0x10000000;
}
void UpdateMode(u32 oldmode, u32 newmode);
void UpdateMode(u32 oldmode, u32 newmode, bool phony = false);
void TriggerIRQ();
@ -294,6 +294,7 @@ public:
// games operate under system mode, generally
#define PU_Map PU_PrivMap
//u8* PU_Map;
// code/16N/32N/32S
u8 MemTimings[0x100000][4];

8
src/ARMInterpreter_LoadStore.cpp
View File

@ -410,7 +410,7 @@ void A_LDM(ARM* cpu)
}
if ((cpu->CurInstr & (1<<22)) && !(cpu->CurInstr & (1<<15)))
cpu->UpdateMode(cpu->CPSR, (cpu->CPSR&~0x1F)|0x10);
cpu->UpdateMode(cpu->CPSR, (cpu->CPSR&~0x1F)|0x10, true);
for (int i = 0; i < 15; i++)
{
@ -439,7 +439,7 @@ void A_LDM(ARM* cpu)
}
if ((cpu->CurInstr & (1<<22)) && !(cpu->CurInstr & (1<<15)))
cpu->UpdateMode((cpu->CPSR&~0x1F)|0x10, cpu->CPSR);
cpu->UpdateMode((cpu->CPSR&~0x1F)|0x10, cpu->CPSR, true);
if (cpu->CurInstr & (1<<21))
{
@ -494,7 +494,7 @@ void A_STM(ARM* cpu)
else if (mode != 0x10 && mode != 0x1F)
isbanked = (baseid >= 13 && baseid < 15);
cpu->UpdateMode(cpu->CPSR, (cpu->CPSR&~0x1F)|0x10);
cpu->UpdateMode(cpu->CPSR, (cpu->CPSR&~0x1F)|0x10, true);
}
for (u32 i = 0; i < 16; i++)
@ -520,7 +520,7 @@ void A_STM(ARM* cpu)
}
if (cpu->CurInstr & (1<<22))
cpu->UpdateMode((cpu->CPSR&~0x1F)|0x10, cpu->CPSR);
cpu->UpdateMode((cpu->CPSR&~0x1F)|0x10, cpu->CPSR, true);
if ((cpu->CurInstr & (1<<23)) && (cpu->CurInstr & (1<<21)))
cpu->R[baseid] = base;

25
src/DSi.cpp
View File

@ -499,6 +499,31 @@ void SetupDirectBoot()
NDS::ARM7BIOSProt = 0x20;
SPI_Firmware::SetupDirectBoot(true);
ARM9->CP15Write(0x100, 0x00056078);
ARM9->CP15Write(0x200, 0x0000004A);
ARM9->CP15Write(0x201, 0x0000004A);
ARM9->CP15Write(0x300, 0x0000000A);
ARM9->CP15Write(0x502, 0x15111011);
ARM9->CP15Write(0x503, 0x05101011);
ARM9->CP15Write(0x600, 0x04000033);
ARM9->CP15Write(0x601, 0x04000033);
ARM9->CP15Write(0x610, 0x02000031);
ARM9->CP15Write(0x611, 0x02000031);
ARM9->CP15Write(0x620, 0x00000000);
ARM9->CP15Write(0x621, 0x00000000);
ARM9->CP15Write(0x630, 0x08000033);
ARM9->CP15Write(0x631, 0x08000033);
ARM9->CP15Write(0x640, 0x0E00001B);
ARM9->CP15Write(0x641, 0x0E00001B);
ARM9->CP15Write(0x650, 0x00000000);
ARM9->CP15Write(0x651, 0x00000000);
ARM9->CP15Write(0x660, 0xFFFF001D);
ARM9->CP15Write(0x661, 0xFFFF001D);
ARM9->CP15Write(0x670, 0x02FFC01B);
ARM9->CP15Write(0x671, 0x02FFC01B);
ARM9->CP15Write(0x910, 0x0E00000A);
ARM9->CP15Write(0x911, 0x00000020);
}
void SoftReset()

29
src/NDS.cpp
View File

@ -414,11 +414,32 @@ void SetupDirectBoot()
ARM7BIOSProt = 0x1204;
SPI_Firmware::SetupDirectBoot(false);
}
ARM9->CP15Write(0x910, 0x0300000A);
ARM9->CP15Write(0x911, 0x00000020);
ARM9->CP15Write(0x100, ARM9->CP15Read(0x100) | 0x00050000);
ARM9->CP15Write(0x100, 0x00012078);
ARM9->CP15Write(0x200, 0x00000042);
ARM9->CP15Write(0x201, 0x00000042);
ARM9->CP15Write(0x300, 0x00000002);
ARM9->CP15Write(0x502, 0x15111011);
ARM9->CP15Write(0x503, 0x05100011);
ARM9->CP15Write(0x600, 0x04000033);
ARM9->CP15Write(0x601, 0x04000033);
ARM9->CP15Write(0x610, 0x0200002B);
ARM9->CP15Write(0x611, 0x0200002B);
ARM9->CP15Write(0x620, 0x00000000);
ARM9->CP15Write(0x621, 0x00000000);
ARM9->CP15Write(0x630, 0x08000035);
ARM9->CP15Write(0x631, 0x08000035);
ARM9->CP15Write(0x640, 0x0300001B);
ARM9->CP15Write(0x641, 0x0300001B);
ARM9->CP15Write(0x650, 0x00000000);
ARM9->CP15Write(0x651, 0x00000000);
ARM9->CP15Write(0x660, 0xFFFF001D);
ARM9->CP15Write(0x661, 0xFFFF001D);
ARM9->CP15Write(0x670, 0x027FF017);
ARM9->CP15Write(0x671, 0x027FF017);
ARM9->CP15Write(0x910, 0x0300000A);
ARM9->CP15Write(0x911, 0x00000020);
}
ARM9->R[12] = NDSCart::Header.ARM9EntryAddress;
ARM9->R[13] = 0x03002F7C;