iris/kaizen
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

RSP DMAs fixes

Browse Source
This commit is contained in:
CocoSimone
2022-09-20 23:03:07 +02:00
parent 29f3793335
commit 7f4352003e
2 changed files with 20 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
src/n64/core/RSP.cpp
View File

@@ -41,8 +41,8 @@ void RSP::Step(MI& mi, Registers& regs, RDP& rdp) {
auto RSP::Read(u32 addr) -> u32{
switch (addr) {
case 0x04040000: return spDMASPAddr.raw & 0xFFFFF8;
case 0x04040004: return spDMADRAMAddr.raw & 0x1FF8;
case 0x04040000: return lastSuccessfulSPAddr.raw & 0x1FF8;
case 0x04040004: return lastSuccessfulDRAMAddr.raw & 0xFFFFF8;
case 0x04040008:
case 0x0404000C: return spDMALen.raw;
case 0x04040010: return spStatus.raw;
@@ -55,21 +55,24 @@ auto RSP::Read(u32 addr) -> u32{
}
template <bool isDRAMdest>
inline void DMA(SPDMALen len, RSP& rsp, u8* dst, u8* src) {
inline void DMA(SPDMALen len, Mem& mem, RSP& rsp, bool bank) {
u32 length = len.len + 1;
length = (length + 0x7) & ~0x7;
u32 dram_address = rsp.spDMADRAMAddr.address & 0xFFFFF8;
u8* dst, *src;
if constexpr (isDRAMdest) {
dst = mem.GetRDRAM();
src = bank ? rsp.imem : rsp.dmem;
} else {
src = mem.GetRDRAM();
dst = bank ? rsp.imem : rsp.dmem;
}
u32 mem_address = rsp.spDMASPAddr.address & 0xFF8;
u32 dram_address = rsp.spDMADRAMAddr.address & 0xFFFFF8;
for (int i = 0; i < len.count + 1; i++) {
/*if(isDRAMdest) {
memcpy(&dst[dram_address], &src[mem_address], length);
} else {
memcpy(&dst[mem_address], &src[dram_address], length);
}*/
for(int j = 0; j < length; j++) {
if constexpr (isDRAMdest) {
dst[dram_address + j] = src[(mem_address + j) & 0xFFF];
@@ -84,8 +87,9 @@ inline void DMA(SPDMALen len, RSP& rsp, u8* dst, u8* src) {
mem_address += length;
}
rsp.spDMADRAMAddr.address = dram_address;
rsp.spDMASPAddr.address = mem_address;
rsp.lastSuccessfulSPAddr.address = mem_address & 0xFF8;
rsp.lastSuccessfulSPAddr.bank = bank;
rsp.lastSuccessfulDRAMAddr.address = dram_address & 0xFFFFF8;
}
void RSP::Write(Mem& mem, Registers& regs, u32 addr, u32 value) {
@@ -95,12 +99,12 @@ void RSP::Write(Mem& mem, Registers& regs, u32 addr, u32 value) {
case 0x04040004: spDMADRAMAddr.raw = value & 0xFFFFF8; break;
case 0x04040008: {
spDMALen.raw = value;
DMA<false>(spDMALen, *this, spDMASPAddr.bank ? imem : dmem, mem.GetRDRAM());
DMA<false>(spDMALen, mem, *this, spDMASPAddr.bank);
spDMALen.raw = 0xFF8 | (spDMALen.skip << 20);
} break;
case 0x0404000C: {
spDMALen.raw = value;
DMA<true>(spDMALen, *this, mem.GetRDRAM(), spDMASPAddr.bank ? imem : dmem);
DMA<true>(spDMALen, mem, *this, spDMASPAddr.bank);
spDMALen.raw = 0xFF8 | (spDMALen.skip << 20);
} break;
case 0x04040010: {

2
src/n64/core/RSP.hpp
View File

@@ -119,6 +119,8 @@ struct RSP {
u16 oldPC{}, pc{}, nextPC{};
SPDMASPAddr spDMASPAddr{};
SPDMADRAMAddr spDMADRAMAddr{};
SPDMASPAddr lastSuccessfulSPAddr;
SPDMADRAMAddr lastSuccessfulDRAMAddr;
SPDMALen spDMALen{};
u8 dmem[DMEM_SIZE]{}, imem[IMEM_SIZE]{};
VPR vpr[32]{};