mirror of
https://github.com/hrydgard/ppsspp.git
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123 lines
4.2 KiB
C++
123 lines
4.2 KiB
C++
// Copyright (c) 2012- PPSSPP Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0 or later versions.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official git repository and contact information can be found at
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// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
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#include "Common/ChunkFile.h"
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#include "Core/CoreTiming.h"
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#include "Core/MemMapHelpers.h"
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#include "Core/Reporting.h"
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#include "Core/HLE/HLE.h"
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#include "Core/HLE/sceDmac.h"
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#include "Core/HLE/sceKernel.h"
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#include "Core/HLE/FunctionWrappers.h"
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#include "Core/Debugger/Breakpoints.h"
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#include "GPU/GPUInterface.h"
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#include "GPU/GPUState.h"
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u64 dmacMemcpyDeadline;
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void __DmacInit() {
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dmacMemcpyDeadline = 0;
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}
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void __DmacDoState(PointerWrap &p) {
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auto s = p.Section("sceDmac", 0, 1);
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if (s == 0) {
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dmacMemcpyDeadline = 0;
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return;
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}
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p.Do(dmacMemcpyDeadline);
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}
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static int __DmacMemcpy(u32 dst, u32 src, u32 size) {
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bool skip = false;
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if (Memory::IsVRAMAddress(src) || Memory::IsVRAMAddress(dst)) {
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skip = gpu->PerformMemoryCopy(dst, src, size);
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}
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if (!skip) {
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Memory::Memcpy(dst, Memory::GetPointer(src), size);
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}
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// This number seems strangely reproducible.
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if (size >= 272) {
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// Approx. 225 MiB/s or 235929600 B/s, so let's go with 236 B/us.
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int delayUs = size / 236;
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dmacMemcpyDeadline = CoreTiming::GetTicks() + usToCycles(delayUs);
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return hleDelayResult(0, "dmac copy", delayUs);
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}
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return 0;
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}
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static u32 sceDmacMemcpy(u32 dst, u32 src, u32 size) {
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if (size == 0) {
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// Some games seem to do this frequently.
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DEBUG_LOG(HLE, "sceDmacMemcpy(dest=%08x, src=%08x, size=%i): invalid size", dst, src, size);
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return SCE_KERNEL_ERROR_INVALID_SIZE;
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}
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if (!Memory::IsValidAddress(dst) || !Memory::IsValidAddress(src)) {
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ERROR_LOG(HLE, "sceDmacMemcpy(dest=%08x, src=%08x, size=%i): invalid address", dst, src, size);
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return SCE_KERNEL_ERROR_INVALID_POINTER;
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}
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if (dst + size >= 0x80000000 || src + size >= 0x80000000 || size >= 0x80000000) {
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ERROR_LOG(HLE, "sceDmacMemcpy(dest=%08x, src=%08x, size=%i): illegal size", dst, src, size);
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return SCE_KERNEL_ERROR_PRIV_REQUIRED;
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}
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if (dmacMemcpyDeadline > CoreTiming::GetTicks()) {
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WARN_LOG_REPORT(HLE, "sceDmacMemcpy(dest=%08x, src=%08x, size=%i): overlapping read", dst, src, size);
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// TODO: Should block, seems like copy doesn't start until previous finishes.
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// Might matter for overlapping copies.
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} else {
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DEBUG_LOG(HLE, "sceDmacMemcpy(dest=%08x, src=%08x, size=%i)", dst, src, size);
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}
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return __DmacMemcpy(dst, src, size);
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}
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static u32 sceDmacTryMemcpy(u32 dst, u32 src, u32 size) {
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if (size == 0) {
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ERROR_LOG(HLE, "sceDmacTryMemcpy(dest=%08x, src=%08x, size=%i): invalid size", dst, src, size);
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return SCE_KERNEL_ERROR_INVALID_SIZE;
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}
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if (!Memory::IsValidAddress(dst) || !Memory::IsValidAddress(src)) {
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ERROR_LOG(HLE, "sceDmacTryMemcpy(dest=%08x, src=%08x, size=%i): invalid address", dst, src, size);
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return SCE_KERNEL_ERROR_INVALID_POINTER;
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}
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if (dst + size >= 0x80000000 || src + size >= 0x80000000 || size >= 0x80000000) {
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ERROR_LOG(HLE, "sceDmacTryMemcpy(dest=%08x, src=%08x, size=%i): illegal size", dst, src, size);
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return SCE_KERNEL_ERROR_PRIV_REQUIRED;
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}
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if (dmacMemcpyDeadline > CoreTiming::GetTicks()) {
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DEBUG_LOG(HLE, "sceDmacTryMemcpy(dest=%08x, src=%08x, size=%i): busy", dst, src, size);
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return SCE_KERNEL_ERROR_BUSY;
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} else {
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DEBUG_LOG(HLE, "sceDmacTryMemcpy(dest=%08x, src=%08x, size=%i)", dst, src, size);
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}
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return __DmacMemcpy(dst, src, size);
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}
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const HLEFunction sceDmac[] = {
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{0X617F3FE6, &WrapU_UUU<sceDmacMemcpy>, "sceDmacMemcpy", 'x', "xxx"},
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{0XD97F94D8, &WrapU_UUU<sceDmacTryMemcpy>, "sceDmacTryMemcpy", 'x', "xxx"},
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};
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void Register_sceDmac() {
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RegisterModule("sceDmac", ARRAY_SIZE(sceDmac), sceDmac);
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}
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