static void __fastcall _ext_memRead128(u32 mem, mem128_t *out)
{
switch (p)
{
//case 1: // hwm
// hwRead128(mem & ~0xa0000000, out); return;
case 6: // gsm
CopyQWC(out,PS2GS_BASE(mem));
return;
}
MEM_LOG("Unknown Memory read128 from address %8.8x", mem);
cpuTlbMissR(mem, cpuRegs.branch);
}
int GIF_Fifo::read(bool calledFromDMA)
{
if (!gifUnit.CanDoPath3() || gifRegs.stat.FQC == 0)
{
//DevCon.Warning("Path3 not masked");
if (gifch.chcr.STR == true && !(cpuRegs.interrupt & (1 << DMAC_GIF)) && calledFromDMA == false) {
GifDMAInt(16);
}
//DevCon.Warning("P3 Masked");
return 0;
}
int valueWritePos = 0;
uint sizeRead;
uint fifoSize = gifRegs.stat.FQC;
int oldReadPos = readpos;
while (gifRegs.stat.FQC) {
CopyQWC(&readdata[valueWritePos], &data[readpos]);
readpos = (readpos + 4) & 63;
valueWritePos = (valueWritePos + 4) & 63;
gifRegs.stat.FQC--;
}
sizeRead = gifUnit.TransferGSPacketData(GIF_TRANS_DMA, (u8*)&readdata[0], fifoSize * 16) / 16; //returns the size actually read
if (sizeRead < fifoSize) {
readpos = (oldReadPos + (sizeRead * 4)) & 63; //if we read less than what was in the fifo, move the read position back
gifRegs.stat.FQC = fifoSize - sizeRead;
}
if (calledFromDMA == false) {
GifDMAInt(sizeRead * BIAS);
}
CalculateFIFOCSR();
return gifRegs.stat.FQC;
}
int GIF_Fifo::write(u32* pMem, int size)
{
if (gifRegs.stat.FQC == 16) {
//DevCon.Warning("Full");
return 0;
}
int transsize;
int firsttrans = std::min(size, 16 - (int)gifRegs.stat.FQC);
gifRegs.stat.FQC += firsttrans;
transsize = firsttrans;
while (transsize-- > 0)
{
CopyQWC(&data[writepos], pMem);
writepos = (writepos + 4) & 63;
pMem += 4;
}
CalculateFIFOCSR();
return firsttrans;
}
