From 60c1003845035ad4cd0e9ea50862bad7626faf0e Mon Sep 17 00:00:00 2001
From: Pixel <Pixel>
Date: Sat, 21 Sep 2002 18:47:46 +0000
Subject: Added the Pcsx source.

---
 PcsxSrc/PsxDma.c | 96 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 PcsxSrc/PsxDma.c

(limited to 'PcsxSrc/PsxDma.c')

diff --git a/PcsxSrc/PsxDma.c b/PcsxSrc/PsxDma.c
new file mode 100644
index 0000000..c765884
--- /dev/null
+++ b/PcsxSrc/PsxDma.c
@@ -0,0 +1,96 @@
+/*  Pcsx - Pc Psx Emulator
+ *  Copyright (C) 1999-2002  Pcsx Team
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "PsxCommon.h"
+
+// Dma0/1 in Mdec.c
+// Dma3   in CdRom.c
+
+void psxDma4(u32 madr, u32 bcr, u32 chcr) { // SPU
+	switch (chcr) {
+		case 0x01000201: //cpu to spu transfer
+#ifdef PSXDMA_LOG
+			PSXDMA_LOG("*** DMA 4 - SPU mem2spu *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
+#endif
+			SPU_writeDMAMem((u16 *)PSXM(madr), (bcr >> 16) * (bcr & 0xffff) * 2);
+			break;
+		case 0x01000200: //spu to cpu transfer
+#ifdef PSXDMA_LOG
+			PSXDMA_LOG("*** DMA 4 - SPU spu2mem *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
+#endif
+    		SPU_readDMAMem ((u16 *)PSXM(madr), (bcr >> 16) * (bcr & 0xffff) * 2);
+			break;
+#ifdef PSXDMA_LOG
+		default:
+			PSXDMA_LOG("*** DMA 4 - SPU unknown *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
+			break;
+#endif
+	}
+}
+
+void psxDma2(u32 madr, u32 bcr, u32 chcr) { // GPU
+	switch(chcr) {
+		case 0x01000200: // vram2mem
+#ifdef PSXDMA_LOG
+			PSXDMA_LOG("*** DMA 2 - GPU vram2mem *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
+#endif
+			GPU_readDataMem((u32 *)PSXM(madr), (bcr >> 16) * (bcr & 0xffff));
+			psxCpu->Clear(madr, ((bcr >> 16) * (bcr & 0xffff)) / 4);
+			break;
+
+		case 0x01000201: // mem2vram
+#ifdef PSXDMA_LOG
+			PSXDMA_LOG("*** DMA 2 - GPU mem2vram *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
+#endif
+			GPU_writeDataMem((u32 *)PSXM(madr), (bcr >> 16) * (bcr & 0xffff));
+			break;
+
+		case 0x01000401: // dma chain
+#ifdef PSXDMA_LOG
+			PSXDMA_LOG("*** DMA 2 - GPU dma chain *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
+#endif
+			GPU_dmaChain((u32 *)psxM, madr & 0x1fffff);
+			break;
+#ifdef PSXDMA_LOG
+		default:
+			PSXDMA_LOG("*** DMA 2 - GPU unknown *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
+			break;
+#endif
+	}
+}
+
+void psxDma6(u32 madr, u32 bcr, u32 chcr) {
+	u32 *mem = (u32 *)PSXM(madr);
+
+#ifdef PSXDMA_LOG
+	PSXDMA_LOG("*** DMA 6 - OT *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
+#endif
+
+	if (chcr == 0x11000002) {
+		while (bcr--) {
+			*mem-- = (madr - 4) & 0xffffff;
+			madr -= 4;
+		}
+		mem++; *mem = 0xffffff;
+	} else {
+		// Unknown option
+#ifdef PSXDMA_LOG
+		PSXDMA_LOG("*** DMA 6 - OT unknown *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
+#endif
+	}
+}
-- 
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