Diamond75/Panda3DS
1
0
Fork 0
mirror of https://github.com/wheremyfoodat/Panda3DS.git synced 2025-04-20 20:49:12 +12:00
Code Issues Projects Releases Packages Wiki Activity Actions

[GPU] DMA

Browse source
This commit is contained in:
wheremyfoodat 2022-12-11 21:32:36 +02:00
parent 8f796352a6
commit e1ac986009
4 changed files with 32 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

21
src/core/PICA/gpu.cpp
View file

@ -158,4 +158,25 @@ void GPU::drawArrays() {
};
const auto shape = primTypes[primType];
drawVertices(shape, vertices, vertexCount);
}
void GPU::fireDMA(u32 dest, u32 source, u32 size) {
printf("[GPU] DMA of %08X bytes from %08X to %08X\n", size, source, dest);
constexpr u32 vramStart = VirtualAddrs::VramStart;
constexpr u32 vramSize = VirtualAddrs::VramSize;
const u32 fcramStart = mem.getLinearHeapVaddr();
constexpr u32 fcramSize = VirtualAddrs::FcramTotalSize;
if (dest - vramStart >= vramSize || size > (vramSize - (dest - vramStart))) [[unlikely]] {
Helpers::panic("GPU DMA does not target VRAM");
}
if (source - fcramStart >= fcramSize || size > (fcramSize - (dest - fcramStart))) {
Helpers::panic("GPU DMA does not have FCRAM as its source");
}
// Valid, optimized FCRAM->VRAM DMA. TODO: Is VRAM->VRAM DMA allowed?
u8* fcram = mem.getFCRAM();
std::memcpy(&vram[dest - vramStart], &fcram[source - fcramStart], size);
}