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DMEM/IMEM mirroring

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SimoneN64
2023-07-25 09:59:57 +02:00
parent a809a76b28
commit fcee7f5850
2 changed files with 68 additions and 48 deletions
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3
src/backend/MemoryRegions.hpp
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@@ -38,8 +38,7 @@
#define CART_REGION_END_2_2 0x0FFFFFFF
#define RDRAM_REGION RDRAM_REGION_START ... RDRAM_REGION_END
#define DMEM_REGION DMEM_REGION_START ... DMEM_REGION_END
#define IMEM_REGION IMEM_REGION_START ... IMEM_REGION_END
#define RSP_MEM_REGION DMEM_REGION_START ... 0x0403FFFF
#define MMIO_REGION 0x04040000 ... 0x041FFFFF: case 0x04300000 ... 0x048FFFFF
#define SP_REGION 0x04040000 ... 0x040FFFFF
#define DP_CMD_REGION 0x04100000 ... 0x041FFFFF

99
src/backend/core/Mem.cpp
View File

@@ -186,10 +186,14 @@ u8 Mem::Read8(n64::Registers &regs, u32 paddr) {
switch (paddr) {
case RDRAM_REGION:
return mmio.rdp.rdram[BYTE_ADDRESS(paddr)];
case DMEM_REGION:
return mmio.rsp.dmem[BYTE_ADDRESS(paddr) - DMEM_REGION_START];
case IMEM_REGION:
return mmio.rsp.imem[BYTE_ADDRESS(paddr) - IMEM_REGION_START];
case RSP_MEM_REGION: {
u32 mirrAddr = paddr & 0x1FFF;
if(mirrAddr >= 0x1000) {
return mmio.rsp.imem[BYTE_ADDRESS(paddr) & IMEM_DSIZE];
} else {
return mmio.rsp.dmem[BYTE_ADDRESS(paddr) & DMEM_DSIZE];
}
}
case 0x04040000 ... 0x040FFFFF:
case 0x04100000 ... 0x041FFFFF:
case 0x04600000 ... 0x048FFFFF:
@@ -251,10 +255,14 @@ u16 Mem::Read16(n64::Registers &regs, u32 paddr) {
switch (paddr) {
case RDRAM_REGION:
return Util::ReadAccess<u16>(mmio.rdp.rdram, HALF_ADDRESS(paddr));
case DMEM_REGION:
return Util::ReadAccess<u16>(mmio.rsp.dmem, HALF_ADDRESS(paddr) & DMEM_DSIZE);
case IMEM_REGION:
case RSP_MEM_REGION: {
u32 mirrAddr = paddr & 0x1FFF;
if(mirrAddr >= 0x1000) {
return Util::ReadAccess<u16>(mmio.rsp.imem, HALF_ADDRESS(paddr) & IMEM_DSIZE);
} else {
return Util::ReadAccess<u16>(mmio.rsp.dmem, HALF_ADDRESS(paddr) & DMEM_DSIZE);
}
}
case MMIO_REGION:
return mmio.Read(paddr);
case CART_REGION_1_2:
@@ -287,10 +295,14 @@ u32 Mem::Read32(n64::Registers &regs, u32 paddr) {
switch(paddr) {
case RDRAM_REGION:
return Util::ReadAccess<u32>(mmio.rdp.rdram, paddr);
case DMEM_REGION:
return Util::ReadAccess<u32>(mmio.rsp.dmem, paddr & DMEM_DSIZE);
case IMEM_REGION:
case RSP_MEM_REGION: {
u32 mirrAddr = paddr & 0x1FFF;
if(mirrAddr >= 0x1000) {
return Util::ReadAccess<u32>(mmio.rsp.imem, paddr & IMEM_DSIZE);
} else {
return Util::ReadAccess<u32>(mmio.rsp.dmem, paddr & DMEM_DSIZE);
}
}
case MMIO_REGION:
return mmio.Read(paddr);
case CART_REGION_1_2:
@@ -329,10 +341,14 @@ u64 Mem::Read64(n64::Registers &regs, u32 paddr) {
switch (paddr) {
case RDRAM_REGION:
return Util::ReadAccess<u64>(mmio.rdp.rdram, paddr);
case DMEM_REGION:
return Util::ReadAccess<u64>(mmio.rsp.dmem, paddr & DMEM_DSIZE);
case IMEM_REGION:
case RSP_MEM_REGION: {
u32 mirrAddr = paddr & 0x1FFF;
if(mirrAddr >= 0x1000) {
return Util::ReadAccess<u64>(mmio.rsp.imem, paddr & IMEM_DSIZE);
} else {
return Util::ReadAccess<u64>(mmio.rsp.dmem, paddr & DMEM_DSIZE);
}
}
case MMIO_REGION:
return mmio.Read(paddr);
case CART_REGION_1_2:
@@ -365,16 +381,17 @@ void Mem::Write8(Registers& regs, u32 paddr, u32 val) {
case RDRAM_REGION:
mmio.rdp.rdram[BYTE_ADDRESS(paddr)] = val;
break;
case DMEM_REGION:
val = val << (8 * (3 - (paddr & 3)));
paddr = (paddr & DMEM_DSIZE) & ~3;
Util::WriteAccess<u32>(mmio.rsp.dmem, paddr & DMEM_DSIZE, val);
break;
case IMEM_REGION:
case RSP_MEM_REGION: {
u32 mirrAddr = paddr & 0x1FFF;
val = val << (8 * (3 - (paddr & 3)));
if(mirrAddr >= 0x1000) {
paddr = (paddr & IMEM_SIZE) & ~3;
Util::WriteAccess<u32>(mmio.rsp.imem, paddr & IMEM_SIZE, val);
break;
Util::WriteAccess<u32>(mmio.rsp.imem, paddr & IMEM_DSIZE, val);
} else {
paddr = (paddr & DMEM_SIZE) & ~3;
Util::WriteAccess<u32>(mmio.rsp.dmem, paddr & DMEM_DSIZE, val);
}
} break;
case MMIO_REGION:
Util::panic("MMIO Write8!");
case CART_REGION_1_2:
@@ -435,16 +452,17 @@ void Mem::Write16(Registers& regs, u32 paddr, u32 val) {
case RDRAM_REGION:
Util::WriteAccess<u16>(mmio.rdp.rdram, HALF_ADDRESS(paddr), val);
break;
case DMEM_REGION:
case RSP_MEM_REGION: {
u32 mirrAddr = paddr & 0x1FFF;
val = val << (16 * !(paddr & 2));
if(mirrAddr >= 0x1000) {
paddr = (paddr & IMEM_SIZE) & ~3;
Util::WriteAccess<u32>(mmio.rsp.imem, paddr & IMEM_DSIZE, val);
} else {
paddr = (paddr & DMEM_SIZE) & ~3;
Util::WriteAccess<u32>(mmio.rsp.dmem, paddr & DMEM_DSIZE, val);
break;
case IMEM_REGION:
val = val << (16 * !(paddr & 2));
paddr = (paddr & IMEM_SIZE) & ~3;
Util::WriteAccess<u32>(mmio.rsp.imem, paddr & IMEM_SIZE, val);
break;
}
} break;
case MMIO_REGION:
Util::panic("MMIO Write16!");
case CART_REGION_1_2:
@@ -484,12 +502,14 @@ void Mem::Write32(Registers& regs, u32 paddr, u32 val) {
case RDRAM_REGION:
Util::WriteAccess<u32>(mmio.rdp.rdram, paddr, val);
break;
case DMEM_REGION:
case RSP_MEM_REGION: {
u32 mirrAddr = paddr & 0x1FFF;
if(mirrAddr >= 0x1000) {
Util::WriteAccess<u32>(mmio.rsp.imem, paddr & IMEM_DSIZE, val);
} else {
Util::WriteAccess<u32>(mmio.rsp.dmem, paddr & DMEM_DSIZE, val);
break;
case IMEM_REGION:
Util::WriteAccess<u32>(mmio.rsp.imem, paddr & IMEM_SIZE, val);
break;
}
} break;
case MMIO_REGION:
mmio.Write(*this, regs, paddr, val);
break;
@@ -548,14 +568,15 @@ void Mem::Write64(Registers& regs, u32 paddr, u64 val) {
case RDRAM_REGION:
Util::WriteAccess<u64>(mmio.rdp.rdram, paddr, val);
break;
case DMEM_REGION:
case RSP_MEM_REGION: {
u32 mirrAddr = paddr & 0x1FFF;
val >>= 32;
if(mirrAddr >= 0x1000) {
Util::WriteAccess<u32>(mmio.rsp.imem, paddr & IMEM_DSIZE, val);
} else {
Util::WriteAccess<u32>(mmio.rsp.dmem, paddr & DMEM_DSIZE, val);
break;
case IMEM_REGION:
val >>= 32;
Util::WriteAccess<u32>(mmio.rsp.imem, paddr & IMEM_SIZE, val);
break;
}
} break;
case MMIO_REGION:
Util::panic("MMIO Write64!");
case CART_REGION_1_2: