ppsspp/Core/MemMap.cpp

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// Copyright (C) 2003 Dolphin Project / 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.h"
#include "MemoryUtil.h"
#include "MemArena.h"
#include "ChunkFile.h"
#include "MemMap.h"
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#include "Core.h"
#include "MIPS/MIPS.h"
#include "MIPS/JitCommon/JitCommon.h"
#include "HLE/HLE.h"
#include "CPU.h"
#include "Debugger/SymbolMap.h"
namespace Memory
{
// The base pointer to the auto-mirrored arena.
u8* base = NULL;
// The MemArena class
MemArena g_arena;
// ==============
// 64-bit: Pointers to low-mem (sub-0x10000000) mirror
// 32-bit: Same as the corresponding physical/virtual pointers.
u8 *m_pRAM;
u8 *m_pScratchPad;
u8 *m_pVRAM;
u8 *m_pPhysicalScratchPad;
// 64-bit: Pointers to high-mem mirrors
// 32-bit: Same as above
u8 *m_pPhysicalRAM;
u8 *m_pUncachedRAM;
u8 *m_pKernelRAM; // RAM mirrored up to "kernel space". Fully accessible at all times currently.
u8 *m_pPhysicalVRAM;
u8 *m_pUncachedVRAM;
// We don't declare the IO region in here since its handled by other means.
static const MemoryView views[] =
{
{&m_pScratchPad, &m_pPhysicalScratchPad, 0x00010000, SCRATCHPAD_SIZE, 0},
{&m_pVRAM, &m_pPhysicalVRAM, 0x04000000, 0x00800000, 0},
{NULL, &m_pUncachedVRAM, 0x44000000, 0x00800000, MV_MIRROR_PREVIOUS},
{&m_pRAM, &m_pPhysicalRAM, 0x08000000, RAM_SIZE, 0}, // only from 0x08800000 is it usable (last 24 megs)
{NULL, &m_pUncachedRAM, 0x48000000, RAM_SIZE, MV_MIRROR_PREVIOUS},
{NULL, &m_pKernelRAM, 0x88000000, RAM_SIZE, MV_MIRROR_PREVIOUS},
// TODO: There are a few swizzled mirrors of VRAM, not sure about the best way to
// implement those.
};
static const int num_views = sizeof(views) / sizeof(MemoryView);
void Init()
{
int flags = 0;
base = MemoryMap_Setup(views, num_views, flags, &g_arena);
INFO_LOG(MEMMAP, "Memory system initialized. RAM at %p (mirror at 0 @ %p, uncached @ %p)",
m_pRAM, m_pPhysicalRAM, m_pUncachedRAM);
}
void DoState(PointerWrap &p)
{
p.DoArray(m_pRAM, RAM_SIZE);
p.DoMarker("RAM");
p.DoArray(m_pVRAM, VRAM_SIZE);
p.DoMarker("VRAM");
p.DoArray(m_pScratchPad, SCRATCHPAD_SIZE);
p.DoMarker("ScratchPad");
}
void Shutdown()
{
u32 flags = 0;
MemoryMap_Shutdown(views, num_views, flags, &g_arena);
g_arena.ReleaseSpace();
base = NULL;
INFO_LOG(MEMMAP, "Memory system shut down.");
}
void Clear()
{
if (m_pRAM)
memset(m_pRAM, 0, RAM_SIZE);
if (m_pScratchPad)
memset(m_pScratchPad, 0, SCRATCHPAD_SIZE);
if (m_pVRAM)
memset(m_pVRAM, 0, VRAM_SIZE);
}
bool AreMemoryBreakpointsActivated()
{
#ifndef ENABLE_MEM_CHECK
return false;
#else
return true;
#endif
}
u32 Read_Instruction(u32 address)
{
u32 inst = Read_U32(address);
if (MIPS_IS_EMUHACK(inst) && MIPSComp::jit)
return MIPSComp::jit->GetBlockCache()->GetOriginalFirstOp(inst & MIPS_EMUHACK_VALUE_MASK);
else
return inst;
}
u32 Read_Opcode_JIT(u32 address)
{
return Read_Instruction(address);
}
// WARNING! No checks!
// We assume that _Address is cached
void Write_Opcode_JIT(const u32 _Address, const u32 _Value)
{
Memory::WriteUnchecked_U32(_Value, _Address);
}
void Memset(const u32 _Address, const u8 _iValue, const u32 _iLength)
{
u8 *ptr = GetPointer(_Address);
if (ptr != NULL)
{
memset(ptr,_iValue,_iLength);
}
else
{
for (size_t i = 0; i < _iLength; i++)
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Write_U8(_iValue, (u32)(_Address + i));
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}
}
void Memcpy(const u32 address, const void *data, const u32 len)
{
memcpy(GetPointer(address), data, len);
}
void GetString(std::string& _string, const u32 em_address)
{
char stringBuffer[2048];
char *string = stringBuffer;
char c;
u32 addr = em_address;
while ((c = Read_U8(addr)))
{
*string++ = c;
addr++;
}
*string++ = '\0';
_string = stringBuffer;
}
const char *GetAddressName(u32 address)
{
// TODO, follow GetPointer
return "[mem]";
}
} // namespace