[pcsx_rearmed.git] / libpcsxcore / psxdma.c

/***************************************************************************
 *   Copyright (C) 2007 Ryan Schultz, PCSX-df Team, 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.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA 02111-1307 USA.           *
 ***************************************************************************/

/*
* Handles PSX DMA functions.
*/

#include "psxdma.h"

// Dma0/1 in Mdec.c
// Dma3   in CdRom.c

void spuInterrupt() {
	HW_DMA4_CHCR &= SWAP32(~0x01000000);
	DMA_INTERRUPT(4);
}

void psxDma4(u32 madr, u32 bcr, u32 chcr) { // SPU
	u16 *ptr;
	u32 size;

	switch (chcr) {
		case 0x01000201: //cpu to spu transfer
#ifdef PSXDMA_LOG
			PSXDMA_LOG("*** DMA4 SPU - mem2spu *** %x addr = %x size = %x\n", chcr, madr, bcr);
#endif
			ptr = (u16 *)PSXM(madr);
			if (ptr == NULL) {
#ifdef CPU_LOG
				CPU_LOG("*** DMA4 SPU - mem2spu *** NULL Pointer!!!\n");
#endif
				break;
			}
			SPU_writeDMAMem(ptr, (bcr >> 16) * (bcr & 0xffff) * 2);
			SPUDMA_INT((bcr >> 16) * (bcr & 0xffff) / 2);
			return;

		case 0x01000200: //spu to cpu transfer
#ifdef PSXDMA_LOG
			PSXDMA_LOG("*** DMA4 SPU - spu2mem *** %x addr = %x size = %x\n", chcr, madr, bcr);
#endif
			ptr = (u16 *)PSXM(madr);
			if (ptr == NULL) {
#ifdef CPU_LOG
				CPU_LOG("*** DMA4 SPU - spu2mem *** NULL Pointer!!!\n");
#endif
				break;
			}
			size = (bcr >> 16) * (bcr & 0xffff) * 2;
			SPU_readDMAMem(ptr, size);
			psxCpu->Clear(madr, size);
			break;

#ifdef PSXDMA_LOG
		default:
			PSXDMA_LOG("*** DMA4 SPU - unknown *** %x addr = %x size = %x\n", chcr, madr, bcr);
			break;
#endif
	}

	HW_DMA4_CHCR &= SWAP32(~0x01000000);
	DMA_INTERRUPT(4);
}

// Taken from PEOPS SOFTGPU
static inline boolean CheckForEndlessLoop(u32 laddr, u32 *lUsedAddr) {
	if (laddr == lUsedAddr[1]) return TRUE;
	if (laddr == lUsedAddr[2]) return TRUE;

	if (laddr < lUsedAddr[0]) lUsedAddr[1] = laddr;
	else lUsedAddr[2] = laddr;

	lUsedAddr[0] = laddr;

	return FALSE;
}

static u32 gpuDmaChainSize(u32 addr) {
	u32 size;
	u32 DMACommandCounter = 0;
	u32 lUsedAddr[3];

	lUsedAddr[0] = lUsedAddr[1] = lUsedAddr[2] = 0xffffff;

	// initial linked list ptr (word)
	size = 1;

	do {
		addr &= 0x1ffffc;

		if (DMACommandCounter++ > 2000000) break;
		if (CheckForEndlessLoop(addr, lUsedAddr)) break;

		// # 32-bit blocks to transfer
		size += psxMu8( addr + 3 );

		// next 32-bit pointer
		addr = psxMu32( addr & ~0x3 ) & 0xffffff;
		size += 1;
	} while (addr != 0xffffff);

	return size;
}

void psxDma2(u32 madr, u32 bcr, u32 chcr) { // GPU
	u32 *ptr;
	u32 size;

	switch (chcr) {
		case 0x01000200: // vram2mem
#ifdef PSXDMA_LOG
			PSXDMA_LOG("*** DMA2 GPU - vram2mem *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
#endif
			ptr = (u32 *)PSXM(madr);
			if (ptr == NULL) {
#ifdef CPU_LOG
				CPU_LOG("*** DMA2 GPU - vram2mem *** NULL Pointer!!!\n");
#endif
				break;
			}
			// BA blocks * BS words (word = 32-bits)
			size = (bcr >> 16) * (bcr & 0xffff);
			GPU_readDataMem(ptr, size);
			psxCpu->Clear(madr, size);

			// already 32-bit word size ((size * 4) / 4)
			GPUDMA_INT(size / 4);
			return;

		case 0x01000201: // mem2vram
#ifdef PSXDMA_LOG
			PSXDMA_LOG("*** DMA 2 - GPU mem2vram *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
#endif
			ptr = (u32 *)PSXM(madr);
			if (ptr == NULL) {
#ifdef CPU_LOG
				CPU_LOG("*** DMA2 GPU - mem2vram *** NULL Pointer!!!\n");
#endif
				break;
			}
			// BA blocks * BS words (word = 32-bits)
			size = (bcr >> 16) * (bcr & 0xffff);
			GPU_writeDataMem(ptr, size);

			// already 32-bit word size ((size * 4) / 4)
			GPUDMA_INT(size / 4);
			return;

		case 0x01000401: // dma chain
#ifdef PSXDMA_LOG
			PSXDMA_LOG("*** DMA 2 - GPU dma chain *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
#endif

			size = GPU_dmaChain((u32 *)psxM, madr & 0x1fffff);
			if ((int)size <= 0)
				size = gpuDmaChainSize(madr);
			
			// Tekken 3 = use 1.0 only (not 1.5x)

			// Einhander = parse linked list in pieces (todo)
			// Final Fantasy 4 = internal vram time (todo)
			// Rebel Assault 2 = parse linked list in pieces (todo)
			// Vampire Hunter D = allow edits to linked list (todo)
			GPUDMA_INT(size);
			return;

#ifdef PSXDMA_LOG
		default:
			PSXDMA_LOG("*** DMA 2 - GPU unknown *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
			break;
#endif
	}

	HW_DMA2_CHCR &= SWAP32(~0x01000000);
	DMA_INTERRUPT(2);
}

void gpuInterrupt() {
	HW_DMA2_CHCR &= SWAP32(~0x01000000);
	DMA_INTERRUPT(2);
}

void psxDma6(u32 madr, u32 bcr, u32 chcr) {
	u32 size;
	u32 *mem = (u32 *)PSXM(madr);

#ifdef PSXDMA_LOG
	PSXDMA_LOG("*** DMA6 OT *** %x addr = %x size = %x\n", chcr, madr, bcr);
#endif

	if (chcr == 0x11000002) {
		if (mem == NULL) {
#ifdef CPU_LOG
			CPU_LOG("*** DMA6 OT *** NULL Pointer!!!\n");
#endif
			HW_DMA6_CHCR &= SWAP32(~0x01000000);
			DMA_INTERRUPT(6);
			return;
		}

		// already 32-bit size
		size = bcr;

		while (bcr--) {
			*mem-- = SWAP32((madr - 4) & 0xffffff);
			madr -= 4;
		}
		mem++; *mem = 0xffffff;

		GPUOTCDMA_INT(size);
		return;
	}
#ifdef PSXDMA_LOG
	else {
		// Unknown option
		PSXDMA_LOG("*** DMA6 OT - unknown *** %x addr = %x size = %x\n", chcr, madr, bcr);
	}
#endif

	HW_DMA6_CHCR &= SWAP32(~0x01000000);
	DMA_INTERRUPT(6);
}

void gpuotcInterrupt()
{
	HW_DMA6_CHCR &= SWAP32(~0x01000000);
	DMA_INTERRUPT(6);
}
Commit	Line	Data
ef79bbde P	1	/***************************************************************************
	2	* Copyright (C) 2007 Ryan Schultz, PCSX-df Team, PCSX team *
	3	* *
	4	* This program is free software; you can redistribute it and/or modify *
	5	* it under the terms of the GNU General Public License as published by *
	6	* the Free Software Foundation; either version 2 of the License, or *
	7	* (at your option) any later version. *
	8	* *
	9	* This program is distributed in the hope that it will be useful, *
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of *
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
	12	* GNU General Public License for more details. *
	13	* *
	14	* You should have received a copy of the GNU General Public License *
	15	* along with this program; if not, write to the *
	16	* Free Software Foundation, Inc., *
	17	* 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307 USA. *
	18	***************************************************************************/
	19
	20	/*
	21	* Handles PSX DMA functions.
	22	*/
	23
	24	#include "psxdma.h"
	25
	26	// Dma0/1 in Mdec.c
	27	// Dma3 in CdRom.c
	28
	29	void spuInterrupt() {
	30	HW_DMA4_CHCR &= SWAP32(~0x01000000);
	31	DMA_INTERRUPT(4);
	32	}
	33
	34	void psxDma4(u32 madr, u32 bcr, u32 chcr) { // SPU
	35	u16 *ptr;
	36	u32 size;
	37
	38	switch (chcr) {
	39	case 0x01000201: //cpu to spu transfer
	40	#ifdef PSXDMA_LOG
	41	PSXDMA_LOG("* DMA4 SPU - mem2spu * %x addr = %x size = %x\n", chcr, madr, bcr);
	42	#endif
	43	ptr = (u16 *)PSXM(madr);
	44	if (ptr == NULL) {
	45	#ifdef CPU_LOG
	46	CPU_LOG("* DMA4 SPU - mem2spu * NULL Pointer!!!\n");
	47	#endif
	48	break;
	49	}
	50	SPU_writeDMAMem(ptr, (bcr >> 16) * (bcr & 0xffff) * 2);
	51	SPUDMA_INT((bcr >> 16) * (bcr & 0xffff) / 2);
	52	return;
	53
	54	case 0x01000200: //spu to cpu transfer
	55	#ifdef PSXDMA_LOG
	56	PSXDMA_LOG("* DMA4 SPU - spu2mem * %x addr = %x size = %x\n", chcr, madr, bcr);
	57	#endif
	58	ptr = (u16 *)PSXM(madr);
	59	if (ptr == NULL) {
	60	#ifdef CPU_LOG
	61	CPU_LOG("* DMA4 SPU - spu2mem * NULL Pointer!!!\n");
	62	#endif
	63	break;
	64	}
65	size = (bcr >> 16) * (bcr & 0xffff) * 2;
66	SPU_readDMAMem(ptr, size);
67	psxCpu->Clear(madr, size);
68	break;
69
70	#ifdef PSXDMA_LOG
71	default:
72	PSXDMA_LOG("* DMA4 SPU - unknown * %x addr = %x size = %x\n", chcr, madr, bcr);
73	break;
74	#endif
75	}
76
77	HW_DMA4_CHCR &= SWAP32(~0x01000000);
78	DMA_INTERRUPT(4);
79	}
80
57a757ce	81	// Taken from PEOPS SOFTGPU
	82	static inline boolean CheckForEndlessLoop(u32 laddr, u32 *lUsedAddr) {
	83	if (laddr == lUsedAddr[1]) return TRUE;
	84	if (laddr == lUsedAddr[2]) return TRUE;
	85
	86	if (laddr < lUsedAddr[0]) lUsedAddr[1] = laddr;
	87	else lUsedAddr[2] = laddr;
	88
	89	lUsedAddr[0] = laddr;
	90
	91	return FALSE;
	92	}
	93
	94	static u32 gpuDmaChainSize(u32 addr) {
	95	u32 size;
	96	u32 DMACommandCounter = 0;
	97	u32 lUsedAddr[3];
	98
	99	lUsedAddr[0] = lUsedAddr[1] = lUsedAddr[2] = 0xffffff;
	100
	101	// initial linked list ptr (word)
	102	size = 1;
	103
	104	do {
	105	addr &= 0x1ffffc;
	106
	107	if (DMACommandCounter++ > 2000000) break;
	108	if (CheckForEndlessLoop(addr, lUsedAddr)) break;
	109
	110	// # 32-bit blocks to transfer
	111	size += psxMu8( addr + 3 );
	112
	113	// next 32-bit pointer
	114	addr = psxMu32( addr & ~0x3 ) & 0xffffff;
	115	size += 1;
	116	} while (addr != 0xffffff);
	117
	118	return size;
	119	}
	120
ef79bbde P	121	void psxDma2(u32 madr, u32 bcr, u32 chcr) { // GPU
	122	u32 *ptr;
	123	u32 size;
	124
57a757ce	125	switch (chcr) {
ef79bbde P	126	case 0x01000200: // vram2mem
ef79bbde P	127	#ifdef PSXDMA_LOG
57a757ce	128	PSXDMA_LOG("* DMA2 GPU - vram2mem * %lx addr = %lx size = %lx\n", chcr, madr, bcr);
ef79bbde P	129	#endif
	130	ptr = (u32 *)PSXM(madr);
	131	if (ptr == NULL) {
	132	#ifdef CPU_LOG
	133	CPU_LOG("* DMA2 GPU - vram2mem * NULL Pointer!!!\n");
	134	#endif
	135	break;
	136	}
57a757ce	137	// BA blocks * BS words (word = 32-bits)
ef79bbde P	138	size = (bcr >> 16) * (bcr & 0xffff);
	139	GPU_readDataMem(ptr, size);
	140	psxCpu->Clear(madr, size);
57a757ce	141
57a757ce	142	// already 32-bit word size ((size * 4) / 4)
916a765b	143	GPUDMA_INT(size / 4);
57a757ce	144	return;
ef79bbde P	145
	146	case 0x01000201: // mem2vram
	147	#ifdef PSXDMA_LOG
57a757ce	148	PSXDMA_LOG("* DMA 2 - GPU mem2vram * %lx addr = %lx size = %lx\n", chcr, madr, bcr);
ef79bbde P	149	#endif
	150	ptr = (u32 *)PSXM(madr);
	151	if (ptr == NULL) {
	152	#ifdef CPU_LOG
	153	CPU_LOG("* DMA2 GPU - mem2vram * NULL Pointer!!!\n");
	154	#endif
	155	break;
	156	}
57a757ce	157	// BA blocks * BS words (word = 32-bits)
ef79bbde P	158	size = (bcr >> 16) * (bcr & 0xffff);
ef79bbde P	159	GPU_writeDataMem(ptr, size);
57a757ce	160
57a757ce	161	// already 32-bit word size ((size * 4) / 4)
916a765b	162	GPUDMA_INT(size / 4);
ef79bbde P	163	return;
	164
	165	case 0x01000401: // dma chain
	166	#ifdef PSXDMA_LOG
57a757ce	167	PSXDMA_LOG("* DMA 2 - GPU dma chain * %lx addr = %lx size = %lx\n", chcr, madr, bcr);
ef79bbde	168	#endif
57a757ce	169
b03e0caf	170	size = GPU_dmaChain((u32 *)psxM, madr & 0x1fffff);
	171	if ((int)size <= 0)
	172	size = gpuDmaChainSize(madr);
57a757ce	173
	174	// Tekken 3 = use 1.0 only (not 1.5x)
	175
	176	// Einhander = parse linked list in pieces (todo)
	177	// Final Fantasy 4 = internal vram time (todo)
	178	// Rebel Assault 2 = parse linked list in pieces (todo)
	179	// Vampire Hunter D = allow edits to linked list (todo)
	180	GPUDMA_INT(size);
	181	return;
ef79bbde P	182
	183	#ifdef PSXDMA_LOG
	184	default:
57a757ce	185	PSXDMA_LOG("* DMA 2 - GPU unknown * %lx addr = %lx size = %lx\n", chcr, madr, bcr);
ef79bbde P	186	break;
	187	#endif
	188	}
	189
	190	HW_DMA2_CHCR &= SWAP32(~0x01000000);
	191	DMA_INTERRUPT(2);
	192	}
	193
	194	void gpuInterrupt() {
	195	HW_DMA2_CHCR &= SWAP32(~0x01000000);
	196	DMA_INTERRUPT(2);
	197	}
	198
	199	void psxDma6(u32 madr, u32 bcr, u32 chcr) {
57a757ce	200	u32 size;
ef79bbde P	201	u32 mem = (u32 )PSXM(madr);
	202
	203	#ifdef PSXDMA_LOG
	204	PSXDMA_LOG("* DMA6 OT * %x addr = %x size = %x\n", chcr, madr, bcr);
	205	#endif
	206
	207	if (chcr == 0x11000002) {
	208	if (mem == NULL) {
	209	#ifdef CPU_LOG
	210	CPU_LOG("* DMA6 OT * NULL Pointer!!!\n");
	211	#endif
	212	HW_DMA6_CHCR &= SWAP32(~0x01000000);
	213	DMA_INTERRUPT(6);
	214	return;
	215	}
	216
57a757ce	217	// already 32-bit size
	218	size = bcr;
	219
ef79bbde P	220	while (bcr--) {
	221	*mem-- = SWAP32((madr - 4) & 0xffffff);
	222	madr -= 4;
	223	}
	224	mem++; *mem = 0xffffff;
57a757ce	225
	226	GPUOTCDMA_INT(size);
	227	return;
ef79bbde P	228	}
	229	#ifdef PSXDMA_LOG
	230	else {
	231	// Unknown option
	232	PSXDMA_LOG("* DMA6 OT - unknown * %x addr = %x size = %x\n", chcr, madr, bcr);
	233	}
	234	#endif
	235
	236	HW_DMA6_CHCR &= SWAP32(~0x01000000);
	237	DMA_INTERRUPT(6);
	238	}
	239
57a757ce	240	void gpuotcInterrupt()
	241	{
	242	HW_DMA6_CHCR &= SWAP32(~0x01000000);
	243	DMA_INTERRUPT(6);
	244	}