Function GIFdma

pcsx2/Gif.cpp:387–463

}

void GIFdma()
{
	while (gifch.qwc > 0 || !gif.gspath3done)
	{
		tDMA_TAG* ptag;
		gif.gscycles = gif.prevcycles;

		if (gifRegs.ctrl.PSE)
		{ // Temporarily stop
			DevCon.WriteLn("Gif dma paused by PSE bit.");
			GifDMAInt(16);
			CPU_SET_DMASTALL(DMAC_GIF, true);
			return;
		}

		if ((dmacRegs.ctrl.STD == STD_GIF) && (gif.prevcycles != 0))
		{
			//Console.WriteLn("GS Stall Control Source = %x, Drain = %x\n MADR = %x, STADR = %x", (psHu32(0xe000) >> 4) & 0x3, (psHu32(0xe000) >> 6) & 0x3, gifch.madr, psHu32(DMAC_STADR));
			if ((gifch.madr + (gifch.qwc * 16)) > dmacRegs.stadr.ADDR)
			{
				GifDMAInt(4);
				CPU_SET_DMASTALL(DMAC_GIF, true);
				gif.gscycles = 0;
				return;
			}
			gif.prevcycles = 0;
			gifch.qwc = 0;
		}

		if ((gifch.chcr.MOD == CHAIN_MODE) && (!gif.gspath3done) && gifch.qwc == 0) // Chain Mode
		{
			ptag = ReadTag();
			if (ptag == NULL)
				return;
			//DevCon.Warning("GIF Reading Tag MSK = %x", vif1Regs.mskpath3);
			GIF_LOG("gifdmaChain %8.8x_%8.8x size=%d, id=%d, addr=%lx tadr=%lx", ptag[1]._u32, ptag[0]._u32, gifch.qwc, ptag->ID, gifch.madr, gifch.tadr);
			gifRegs.stat.FQC = std::min((u32)0x10, gifch.qwc);
			CalculateFIFOCSR();

			if (dmacRegs.ctrl.STD == STD_GIF)
			{
				// there are still bugs, need to also check if gifch.madr +16*qwc >= stadr, if not, stall
				if ((ptag->ID == TAG_REFS) && ((gifch.madr + (gifch.qwc * 16)) > dmacRegs.stadr.ADDR))
				{
					// stalled.
					// We really need to test this. Pay attention to prevcycles, as it used to trigger GIFchains in the code above. (rama)
					//DevCon.Warning("GS Stall Control start Source = %x, Drain = %x\n MADR = %x, STADR = %x", (psHu32(0xe000) >> 4) & 0x3, (psHu32(0xe000) >> 6) & 0x3,gifch.madr, psHu32(DMAC_STADR));
					gif.prevcycles = gif.gscycles;
					gifch.tadr -= 16;
					gifch.qwc = 0;
					hwDmacIrq(DMAC_STALL_SIS);
					GifDMAInt(128);
					gif.gscycles = 0;
					CPU_SET_DMASTALL(DMAC_GIF, true);
					return;
				}
			}