[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"
#include "gpu.h"

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

void spuInterrupt() {
	if (HW_DMA4_CHCR & SWAP32(0x01000000))
	{
		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);
			HW_GPU_STATUS &= ~PSXGPU_nBUSY;
			
			// 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() {
	if (HW_DMA2_CHCR & SWAP32(0x01000000))
	{
		HW_DMA2_CHCR &= SWAP32(~0x01000000);
		DMA_INTERRUPT(2);
	}
	HW_GPU_STATUS |= PSXGPU_nBUSY; // GPU no longer busy
}

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()
{
	if (HW_DMA6_CHCR & SWAP32(0x01000000))
	{
		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"
6c036261	25	#include "gpu.h"
ef79bbde P	26
	27	// Dma0/1 in Mdec.c
	28	// Dma3 in CdRom.c
	29
	30	void spuInterrupt() {
ad418c19	31	if (HW_DMA4_CHCR & SWAP32(0x01000000))
	32	{
	33	HW_DMA4_CHCR &= SWAP32(~0x01000000);
	34	DMA_INTERRUPT(4);
	35	}
ef79bbde P	36	}
	37
	38	void psxDma4(u32 madr, u32 bcr, u32 chcr) { // SPU
	39	u16 *ptr;
	40	u32 size;
	41
	42	switch (chcr) {
	43	case 0x01000201: //cpu to spu transfer
	44	#ifdef PSXDMA_LOG
	45	PSXDMA_LOG("* DMA4 SPU - mem2spu * %x addr = %x size = %x\n", chcr, madr, bcr);
	46	#endif
	47	ptr = (u16 *)PSXM(madr);
	48	if (ptr == NULL) {
	49	#ifdef CPU_LOG
	50	CPU_LOG("* DMA4 SPU - mem2spu * NULL Pointer!!!\n");
	51	#endif
	52	break;
	53	}
	54	SPU_writeDMAMem(ptr, (bcr >> 16) * (bcr & 0xffff) * 2);
	55	SPUDMA_INT((bcr >> 16) * (bcr & 0xffff) / 2);
	56	return;
	57
	58	case 0x01000200: //spu to cpu transfer
	59	#ifdef PSXDMA_LOG
	60	PSXDMA_LOG("* DMA4 SPU - spu2mem * %x addr = %x size = %x\n", chcr, madr, bcr);
	61	#endif
	62	ptr = (u16 *)PSXM(madr);
	63	if (ptr == NULL) {
	64	#ifdef CPU_LOG
	65	CPU_LOG("* DMA4 SPU - spu2mem * NULL Pointer!!!\n");
	66	#endif
	67	break;
	68	}
	69	size = (bcr >> 16) * (bcr & 0xffff) * 2;
	70	SPU_readDMAMem(ptr, size);
	71	psxCpu->Clear(madr, size);
	72	break;
	73
	74	#ifdef PSXDMA_LOG
	75	default:
	76	PSXDMA_LOG("* DMA4 SPU - unknown * %x addr = %x size = %x\n", chcr, madr, bcr);
	77	break;
	78	#endif
	79	}
	80
	81	HW_DMA4_CHCR &= SWAP32(~0x01000000);
	82	DMA_INTERRUPT(4);
	83	}
	84
57a757ce	85	// Taken from PEOPS SOFTGPU
	86	static inline boolean CheckForEndlessLoop(u32 laddr, u32 *lUsedAddr) {
	87	if (laddr == lUsedAddr[1]) return TRUE;
	88	if (laddr == lUsedAddr[2]) return TRUE;
	89
	90	if (laddr < lUsedAddr[0]) lUsedAddr[1] = laddr;
	91	else lUsedAddr[2] = laddr;
	92
	93	lUsedAddr[0] = laddr;
	94
	95	return FALSE;
	96	}
	97
	98	static u32 gpuDmaChainSize(u32 addr) {
	99	u32 size;
	100	u32 DMACommandCounter = 0;
	101	u32 lUsedAddr[3];
	102
	103	lUsedAddr[0] = lUsedAddr[1] = lUsedAddr[2] = 0xffffff;
	104
	105	// initial linked list ptr (word)
	106	size = 1;
	107
	108	do {
	109	addr &= 0x1ffffc;
	110
	111	if (DMACommandCounter++ > 2000000) break;
	112	if (CheckForEndlessLoop(addr, lUsedAddr)) break;
	113
	114	// # 32-bit blocks to transfer
	115	size += psxMu8( addr + 3 );
	116
	117	// next 32-bit pointer
	118	addr = psxMu32( addr & ~0x3 ) & 0xffffff;
	119	size += 1;
	120	} while (addr != 0xffffff);
	121
	122	return size;
	123	}
	124
ef79bbde P	125	void psxDma2(u32 madr, u32 bcr, u32 chcr) { // GPU
	126	u32 *ptr;
	127	u32 size;
	128
57a757ce	129	switch (chcr) {
ef79bbde P	130	case 0x01000200: // vram2mem
ef79bbde P	131	#ifdef PSXDMA_LOG
57a757ce	132	PSXDMA_LOG("* DMA2 GPU - vram2mem * %lx addr = %lx size = %lx\n", chcr, madr, bcr);
ef79bbde P	133	#endif
	134	ptr = (u32 *)PSXM(madr);
	135	if (ptr == NULL) {
	136	#ifdef CPU_LOG
	137	CPU_LOG("* DMA2 GPU - vram2mem * NULL Pointer!!!\n");
	138	#endif
	139	break;
	140	}
57a757ce	141	// BA blocks * BS words (word = 32-bits)
ef79bbde P	142	size = (bcr >> 16) * (bcr & 0xffff);
	143	GPU_readDataMem(ptr, size);
	144	psxCpu->Clear(madr, size);
57a757ce	145
57a757ce	146	// already 32-bit word size ((size * 4) / 4)
916a765b	147	GPUDMA_INT(size / 4);
57a757ce	148	return;
ef79bbde P	149
	150	case 0x01000201: // mem2vram
	151	#ifdef PSXDMA_LOG
57a757ce	152	PSXDMA_LOG("* DMA 2 - GPU mem2vram * %lx addr = %lx size = %lx\n", chcr, madr, bcr);
ef79bbde P	153	#endif
	154	ptr = (u32 *)PSXM(madr);
	155	if (ptr == NULL) {
	156	#ifdef CPU_LOG
	157	CPU_LOG("* DMA2 GPU - mem2vram * NULL Pointer!!!\n");
	158	#endif
	159	break;
	160	}
57a757ce	161	// BA blocks * BS words (word = 32-bits)
ef79bbde P	162	size = (bcr >> 16) * (bcr & 0xffff);
ef79bbde P	163	GPU_writeDataMem(ptr, size);
57a757ce	164
57a757ce	165	// already 32-bit word size ((size * 4) / 4)
916a765b	166	GPUDMA_INT(size / 4);
ef79bbde P	167	return;
	168
	169	case 0x01000401: // dma chain
	170	#ifdef PSXDMA_LOG
57a757ce	171	PSXDMA_LOG("* DMA 2 - GPU dma chain * %lx addr = %lx size = %lx\n", chcr, madr, bcr);
ef79bbde	172	#endif
57a757ce	173
b03e0caf	174	size = GPU_dmaChain((u32 *)psxM, madr & 0x1fffff);
	175	if ((int)size <= 0)
	176	size = gpuDmaChainSize(madr);
6c036261	177	HW_GPU_STATUS &= ~PSXGPU_nBUSY;
57a757ce	178
	179	// Tekken 3 = use 1.0 only (not 1.5x)
	180
	181	// Einhander = parse linked list in pieces (todo)
	182	// Final Fantasy 4 = internal vram time (todo)
	183	// Rebel Assault 2 = parse linked list in pieces (todo)
	184	// Vampire Hunter D = allow edits to linked list (todo)
	185	GPUDMA_INT(size);
	186	return;
ef79bbde P	187
	188	#ifdef PSXDMA_LOG
	189	default:
57a757ce	190	PSXDMA_LOG("* DMA 2 - GPU unknown * %lx addr = %lx size = %lx\n", chcr, madr, bcr);
ef79bbde P	191	break;
	192	#endif
	193	}
	194
	195	HW_DMA2_CHCR &= SWAP32(~0x01000000);
	196	DMA_INTERRUPT(2);
	197	}
	198
	199	void gpuInterrupt() {
ad418c19	200	if (HW_DMA2_CHCR & SWAP32(0x01000000))
	201	{
	202	HW_DMA2_CHCR &= SWAP32(~0x01000000);
	203	DMA_INTERRUPT(2);
	204	}
6c036261	205	HW_GPU_STATUS \|= PSXGPU_nBUSY; // GPU no longer busy
ef79bbde P	206	}
	207
	208	void psxDma6(u32 madr, u32 bcr, u32 chcr) {
57a757ce	209	u32 size;
ef79bbde P	210	u32 mem = (u32 )PSXM(madr);
	211
	212	#ifdef PSXDMA_LOG
	213	PSXDMA_LOG("* DMA6 OT * %x addr = %x size = %x\n", chcr, madr, bcr);
	214	#endif
	215
	216	if (chcr == 0x11000002) {
	217	if (mem == NULL) {
	218	#ifdef CPU_LOG
	219	CPU_LOG("* DMA6 OT * NULL Pointer!!!\n");
	220	#endif
	221	HW_DMA6_CHCR &= SWAP32(~0x01000000);
	222	DMA_INTERRUPT(6);
	223	return;
	224	}
	225
57a757ce	226	// already 32-bit size
	227	size = bcr;
	228
ef79bbde P	229	while (bcr--) {
	230	*mem-- = SWAP32((madr - 4) & 0xffffff);
	231	madr -= 4;
	232	}
	233	mem++; *mem = 0xffffff;
57a757ce	234
	235	GPUOTCDMA_INT(size);
	236	return;
ef79bbde P	237	}
	238	#ifdef PSXDMA_LOG
	239	else {
	240	// Unknown option
	241	PSXDMA_LOG("* DMA6 OT - unknown * %x addr = %x size = %x\n", chcr, madr, bcr);
	242	}
	243	#endif
	244
	245	HW_DMA6_CHCR &= SWAP32(~0x01000000);
	246	DMA_INTERRUPT(6);
	247	}
	248
57a757ce	249	void gpuotcInterrupt()
57a757ce	250	{
ad418c19	251	if (HW_DMA6_CHCR & SWAP32(0x01000000))
	252	{
	253	HW_DMA6_CHCR &= SWAP32(~0x01000000);
	254	DMA_INTERRUPT(6);
	255	}
57a757ce	256	}