X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=libpcsxcore%2Fpsxdma.c;h=24570968dd07cba6d2593845b50cbabdff82ce15;hb=9a0a61d27586bfb93aa443cc59d9588d2b9cf992;hp=30aa9bdb90e4d3d8da73608eda153d5a1c2856f7;hpb=8c84ba5f4478dd4e7cc48e86f1b023bc6b99ea9c;p=pcsx_rearmed.git diff --git a/libpcsxcore/psxdma.c b/libpcsxcore/psxdma.c index 30aa9bdb..24570968 100644 --- a/libpcsxcore/psxdma.c +++ b/libpcsxcore/psxdma.c @@ -24,6 +24,13 @@ #include "psxdma.h" #include "gpu.h" +#ifndef min +#define min(a, b) ((b) < (a) ? (b) : (a)) +#endif +#ifndef PSXDMA_LOG +#define PSXDMA_LOG(...) +#endif + // Dma0/1 in Mdec.c // Dma3 in CdRom.c @@ -36,44 +43,42 @@ void spuInterrupt() { } void psxDma4(u32 madr, u32 bcr, u32 chcr) { // SPU + u32 words, words_max = 0, words_copy; u16 *ptr; - u32 words; + + madr &= ~3; + ptr = getDmaRam(madr, &words_max); + if (ptr == INVALID_PTR) + log_unhandled("bad dma4 madr %x\n", madr); + + words = words_copy = (bcr >> 16) * (bcr & 0xffff); + if (words_copy > words_max) { + log_unhandled("bad dma4 madr %x bcr %x\n", madr, bcr); + words_copy = words_max; + } 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 == INVALID_PTR) { -#ifdef CPU_LOG - CPU_LOG("*** DMA4 SPU - mem2spu *** NULL Pointer!!!\n"); -#endif + if (ptr == INVALID_PTR) break; - } - words = (bcr >> 16) * (bcr & 0xffff); - SPU_writeDMAMem(ptr, words * 2, psxRegs.cycle); - HW_DMA4_MADR = SWAPu32(madr + words * 4); - SPUDMA_INT(words * 4); + SPU_writeDMAMem(ptr, words_copy * 2, psxRegs.cycle); + HW_DMA4_MADR = SWAPu32(madr + words_copy * 2); + // This should be much slower, like 12+ cycles/byte, it's like + // that because the CPU runs too fast and fifo is not emulated. + // See also set_dma_end(). + set_event(PSXINT_SPUDMA, words * 4); 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 == INVALID_PTR) { -#ifdef CPU_LOG - CPU_LOG("*** DMA4 SPU - spu2mem *** NULL Pointer!!!\n"); -#endif + if (ptr == INVALID_PTR) break; - } - words = (bcr >> 16) * (bcr & 0xffff); - SPU_readDMAMem(ptr, words * 2, psxRegs.cycle); - psxCpu->Clear(madr, words); + SPU_readDMAMem(ptr, words_copy * 2, psxRegs.cycle); + psxCpu->Clear(madr, words_copy); - HW_DMA4_MADR = SWAPu32(madr + words * 4); - SPUDMA_INT(words * 4); + HW_DMA4_MADR = SWAPu32(madr + words_copy * 4); + set_event(PSXINT_SPUDMA, words * 4); return; default: @@ -127,59 +132,61 @@ static u32 gpuDmaChainSize(u32 addr) { } void psxDma2(u32 madr, u32 bcr, u32 chcr) { // GPU - u32 *ptr, madr_next, *madr_next_p; + u32 *ptr, madr_next, *madr_next_p, size; + u32 words, words_left, words_max, words_copy; int do_walking; - u32 words; - u32 size; + madr &= ~3; 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); + ptr = getDmaRam(madr, &words_max); if (ptr == INVALID_PTR) { -#ifdef CPU_LOG - CPU_LOG("*** DMA2 GPU - vram2mem *** NULL Pointer!!!\n"); -#endif + log_unhandled("bad dma2 madr %x\n", madr); break; } // BA blocks * BS words (word = 32-bits) - words = (bcr >> 16) * (bcr & 0xffff); - GPU_readDataMem(ptr, words); - psxCpu->Clear(madr, words); + words = words_copy = (bcr >> 16) * (bcr & 0xffff); + if (words > words_max) { + log_unhandled("bad dma2 madr %x bcr %x\n", madr, bcr); + words_copy = words_max; + } + GPU_readDataMem(ptr, words_copy); + psxCpu->Clear(madr, words_copy); - HW_DMA2_MADR = SWAPu32(madr + words * 4); + HW_DMA2_MADR = SWAPu32(madr + words_copy * 4); + // careful: gpu_state_change() also messes with this + HW_GPU_STATUS &= SWAP32(~PSXGPU_nBUSY); // already 32-bit word size ((size * 4) / 4) - GPUDMA_INT(words / 4); + set_event(PSXINT_GPUDMA, words / 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 == INVALID_PTR) { -#ifdef CPU_LOG - CPU_LOG("*** DMA2 GPU - mem2vram *** NULL Pointer!!!\n"); -#endif - break; + words = words_left = (bcr >> 16) * (bcr & 0xffff); + while (words_left > 0) { + ptr = getDmaRam(madr, &words_max); + if (ptr == INVALID_PTR) { + log_unhandled("bad2 dma madr %x\n", madr); + break; + } + words_copy = min(words_left, words_max); + GPU_writeDataMem(ptr, words_copy); + words_left -= words_copy; + madr += words_copy * 4; } - // BA blocks * BS words (word = 32-bits) - words = (bcr >> 16) * (bcr & 0xffff); - GPU_writeDataMem(ptr, words); - HW_DMA2_MADR = SWAPu32(madr + words * 4); + HW_DMA2_MADR = SWAPu32(madr); + // careful: gpu_state_change() also messes with this + HW_GPU_STATUS &= SWAP32(~PSXGPU_nBUSY); // already 32-bit word size ((size * 4) / 4) - GPUDMA_INT(words / 4); + set_event(PSXINT_GPUDMA, words / 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 // when not emulating walking progress, end immediately madr_next = 0xffffff; @@ -199,7 +206,7 @@ void psxDma2(u32 madr, u32 bcr, u32 chcr) { // GPU // Einhander = parse linked list in pieces (todo) // Rebel Assault 2 = parse linked list in pieces (todo) - GPUDMA_INT(size); + set_event(PSXINT_GPUDMA, size); return; default: @@ -211,13 +218,15 @@ void psxDma2(u32 madr, u32 bcr, u32 chcr) { // GPU DMA_INTERRUPT(2); } +// note: this is also (ab)used for non-dma prim command +// to delay gpu returning to idle state, see gpu_state_change() void gpuInterrupt() { if (HW_DMA2_CHCR == SWAP32(0x01000401) && !(HW_DMA2_MADR & SWAP32(0x800000))) { u32 size, madr_next = 0xffffff; size = GPU_dmaChain((u32 *)psxM, HW_DMA2_MADR & 0x1fffff, &madr_next); HW_DMA2_MADR = SWAPu32(madr_next); - GPUDMA_INT(size); + set_event(PSXINT_GPUDMA, size); return; } if (HW_DMA2_CHCR & SWAP32(0x01000000)) @@ -229,19 +238,16 @@ void gpuInterrupt() { } void psxDma6(u32 madr, u32 bcr, u32 chcr) { - u32 words; - u32 *mem = (u32 *)PSXM(madr); + u32 words, words_max; + u32 *mem; -#ifdef PSXDMA_LOG PSXDMA_LOG("*** DMA6 OT *** %x addr = %x size = %x\n", chcr, madr, bcr); -#endif if (chcr == 0x11000002) { + mem = getDmaRam(madr, &words_max); if (mem == INVALID_PTR) { -#ifdef CPU_LOG - CPU_LOG("*** DMA6 OT *** NULL Pointer!!!\n"); -#endif - HW_DMA6_CHCR &= SWAP32(~0x01000000); + log_unhandled("bad6 dma madr %x\n", madr); + HW_DMA6_CHCR &= SWAP32(~0x11000000); DMA_INTERRUPT(6); return; } @@ -249,16 +255,15 @@ void psxDma6(u32 madr, u32 bcr, u32 chcr) { // already 32-bit size words = bcr; - while (bcr--) { + while (bcr-- && mem > (u32 *)psxM) { *mem-- = SWAP32((madr - 4) & 0xffffff); madr -= 4; } *++mem = SWAP32(0xffffff); - //GPUOTCDMA_INT(size); // halted psxRegs.cycle += words; - GPUOTCDMA_INT(16); + set_event(PSXINT_GPUOTCDMA, 16); return; } else { @@ -266,7 +271,7 @@ void psxDma6(u32 madr, u32 bcr, u32 chcr) { log_unhandled("*** DMA6 OT - unknown *** %x addr = %x size = %x\n", chcr, madr, bcr); } - HW_DMA6_CHCR &= SWAP32(~0x01000000); + HW_DMA6_CHCR &= SWAP32(~0x11000000); DMA_INTERRUPT(6); } @@ -274,7 +279,7 @@ void gpuotcInterrupt() { if (HW_DMA6_CHCR & SWAP32(0x01000000)) { - HW_DMA6_CHCR &= SWAP32(~0x01000000); + HW_DMA6_CHCR &= SWAP32(~0x11000000); DMA_INTERRUPT(6); } }