Function dmaGetAddr

pcsx2/Dmac.cpp:149–176

Note: Dma addresses are guaranteed to be aligned to 16 bytes (128 bits)

// Note: Dma addresses are guaranteed to be aligned to 16 bytes (128 bits)
__ri tDMA_TAG *dmaGetAddr(u32 addr, bool write)
{
	// if (addr & 0xf) { DMA_LOG("*PCSX2*: DMA address not 128bit aligned: %8.8x", addr); }
	if (DMA_TAG(addr).SPR) return (tDMA_TAG*)&eeMem->Scratch[addr & 0x3ff0];

	// FIXME: Why??? DMA uses physical addresses
	addr &= 0x1ffffff0;

	if (addr < Ps2MemSize::ExposedRam)
	{
		return (tDMA_TAG*)&eeMem->Main[addr];
	}
	else if (addr < 0x10000000)
	{
		return (tDMA_TAG*)(write ? eeMem->ZeroWrite : eeMem->ZeroRead);
	}
	else if (addr < 0x10004000)
	{
		// Secret scratchpad address for DMA = end of maximum main memory?
		//Console.Warning("Writing to the scratchpad without the SPR flag set!");
		return (tDMA_TAG*)&eeMem->Scratch[addr & 0x3ff0];
	}
	else
	{
		Console.Error( "*PCSX2*: DMA error: %8.8x", addr);
		return NULL;
	}
}


// Returns true if the DMA is enabled and executed successfully.  Returns false if execution