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DMA: Hack for self-referencing DMA loops

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I need to figure how these are being generated in the first place.
This commit is contained in:
Connor McLaughlin 2019-11-11 20:37:11 +10:00
parent 29674df803
commit f3baee2582
1 changed files with 9 additions and 3 deletions
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12
src/core/dma.cpp
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@ -283,10 +283,16 @@ void DMA::TransferChannel(Channel channel)
const u32 next_address = header & UINT32_C(0x00FFFFFF);
Log_TracePrintf(" .. linked list entry at 0x%08X size=%u(%u words) next=0x%08X", current_address,
word_count * UINT32_C(4), word_count, next_address);
current_address += sizeof(header);
if (word_count > 0)
TransferMemoryToDevice(channel, current_address & ADDRESS_MASK, 4, word_count);
TransferMemoryToDevice(channel, (current_address + sizeof(header)) & ADDRESS_MASK, 4, word_count);
// Self-referencing DMA loops.. not sure how these are happening?
if (current_address == next_address)
{
Log_ErrorPrintf("HACK: Aborting self-referencing DMA loop @ 0x%08X. Something went wrong to generate this.",
current_address);
break;
}
current_address = next_address;
if (current_address & UINT32_C(0x800000))