ppsspp/Core/HLE/sceDmac.cpp

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// Copyright (c) 2012- PPSSPP Project.
// 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, version 2.0 or later versions.
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// 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 2.0 for more details.
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
// Official git repository and contact information can be found at
// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
#include "Common/ChunkFile.h"
#include "Core/HLE/sceDmac.h"
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#include "Core/CoreTiming.h"
#include "Core/MemMap.h"
#include "Core/Reporting.h"
#include "Core/HLE/HLE.h"
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#include "Core/HLE/sceKernel.h"
#include "Core/HLE/FunctionWrappers.h"
#include "Core/Debugger/Breakpoints.h"
#include "GPU/GPUInterface.h"
#include "GPU/GPUState.h"
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u64 dmacMemcpyDeadline;
void __DmacInit() {
dmacMemcpyDeadline = 0;
}
void __DmacDoState(PointerWrap &p) {
auto s = p.Section("sceDmac", 0, 1);
if (s == 0) {
dmacMemcpyDeadline = 0;
return;
}
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p.Do(dmacMemcpyDeadline);
}
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int __DmacMemcpy(u32 dst, u32 src, u32 size) {
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Memory::Memcpy(dst, Memory::GetPointer(src), size);
#ifndef MOBILE_DEVICE
CBreakPoints::ExecMemCheck(src, false, size, currentMIPS->pc);
CBreakPoints::ExecMemCheck(dst, true, size, currentMIPS->pc);
#endif
src &= ~0x40000000;
dst &= ~0x40000000;
if (Memory::IsVRAMAddress(src) || Memory::IsVRAMAddress(dst)) {
gpu->UpdateMemory(dst, src, size);
}
// This number seems strangely reproducible.
if (size >= 272) {
// Approx. 225 MiB/s or 235929600 B/s, so let's go with 236 B/us.
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int delayUs = size / 236;
dmacMemcpyDeadline = CoreTiming::GetTicks() + usToCycles(delayUs);
return hleDelayResult(0, "dmac copy", delayUs);
}
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return 0;
}
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u32 sceDmacMemcpy(u32 dst, u32 src, u32 size) {
if (size == 0) {
// Some games seem to do this frequently.
DEBUG_LOG(HLE, "sceDmacMemcpy(dest=%08x, src=%08x, size=%i): invalid size", dst, src, size);
return SCE_KERNEL_ERROR_INVALID_SIZE;
}
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);
return SCE_KERNEL_ERROR_INVALID_POINTER;
}
if (dst + size >= 0x80000000 || src + size >= 0x80000000 || size >= 0x80000000) {
ERROR_LOG(HLE, "sceDmacMemcpy(dest=%08x, src=%08x, size=%i): illegal size", dst, src, size);
return SCE_ERROR_PRIV_REQUIRED;
}
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if (dmacMemcpyDeadline > CoreTiming::GetTicks()) {
WARN_LOG_REPORT(HLE, "sceDmacMemcpy(dest=%08x, src=%08x, size=%i): overlapping read", dst, src, size);
// TODO: Should block, seems like copy doesn't start until previous finishes.
// Might matter for overlapping copies.
} else {
DEBUG_LOG(HLE, "sceDmacMemcpy(dest=%08x, src=%08x, size=%i)", dst, src, size);
}
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return __DmacMemcpy(dst, src, size);
}
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u32 sceDmacTryMemcpy(u32 dst, u32 src, u32 size) {
if (size == 0) {
ERROR_LOG(HLE, "sceDmacTryMemcpy(dest=%08x, src=%08x, size=%i): invalid size", dst, src, size);
return SCE_KERNEL_ERROR_INVALID_SIZE;
}
if (!Memory::IsValidAddress(dst) || !Memory::IsValidAddress(src)) {
ERROR_LOG(HLE, "sceDmacTryMemcpy(dest=%08x, src=%08x, size=%i): invalid address", dst, src, size);
return SCE_KERNEL_ERROR_INVALID_POINTER;
}
if (dst + size >= 0x80000000 || src + size >= 0x80000000 || size >= 0x80000000) {
ERROR_LOG(HLE, "sceDmacTryMemcpy(dest=%08x, src=%08x, size=%i): illegal size", dst, src, size);
return SCE_ERROR_PRIV_REQUIRED;
}
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if (dmacMemcpyDeadline > CoreTiming::GetTicks()) {
DEBUG_LOG(HLE, "sceDmacTryMemcpy(dest=%08x, src=%08x, size=%i): busy", dst, src, size);
return SCE_KERNEL_ERROR_BUSY;
} else {
DEBUG_LOG(HLE, "sceDmacTryMemcpy(dest=%08x, src=%08x, size=%i)", dst, src, size);
}
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return __DmacMemcpy(dst, src, size);
}
const HLEFunction sceDmac[] = {
{0x617f3fe6, &WrapU_UUU<sceDmacMemcpy>, "sceDmacMemcpy"},
{0xd97f94d8, &WrapU_UUU<sceDmacTryMemcpy>, "sceDmacTryMemcpy"},
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};
void Register_sceDmac() {
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RegisterModule("sceDmac", ARRAY_SIZE(sceDmac), sceDmac);
}