steam-frame/mitch030504--Wiicompiled_VR_Frame
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Bulk-copy DVD DMA into non-executable guest RAM

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Ported from chrissotraidis/wiicompiled (KartPad) ec14a0dddacbd1267de159215ba39d5f19633164.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019rLZ24cFcqTNBmb4w2dpSq
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Chris SotraidisandClaude Opus 5.5 authored and Claude committed 2026-10-05 15:54:41 +00:00
1 parent 77333709ae
commit 03db602a05
1 file changed
+8 -3
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runtime/src/hle/storage/dvd.cpp
+8 -3
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@@ -104,10 +104,15 @@ extern "C" void DVDInit_8015EA1C();
extern "C" uint32_t g_dvdFstReservedBase;
extern "C" uint32_t g_dvdFstReservedSize;
// Byte-wise copy into guest RAM plus the DMA notification the GX caches need.
// DVD DMA normally targets ordinary RAM. Keep scalar writes for executable
// ranges so the translated-code write guard still sees every modified byte.
static void CopyToGuestAsDma(uint32_t dest, const uint8_t* data, size_t size) {
for (size_t i = 0; i < size; ++i) {
Memory::Write8(dest + static_cast<uint32_t>(i), data[i]);
if (size != 0 && !RecompMod::ExecutableWriteGuardMayHit(dest, size)) {
std::memcpy(Memory::GetPointer(dest, size), data, size);
} else {
for (size_t i = 0; i < size; ++i) {
Memory::Write8(dest + static_cast<uint32_t>(i), data[i]);
}
}
GxNotifyGuestRamDmaWrite(dest, static_cast<uint32_t>(size));
}