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MemMapFunctions.cpp
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MemMapFunctions.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.
// 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/CommonTypes.h"
#include "Common/LogReporting.h"
#include "Core/Core.h"
#include "Core/MemMap.h"
#include "Core/Config.h"
#include "Core/ConfigValues.h"
#include "Core/MIPS/MIPS.h"
namespace Memory {
u8 *GetPointerWrite(const u32 address) {
if ((address & 0x3E000000) == 0x08000000 || // RAM
(address & 0x3F800000) == 0x04000000 || // VRAM
(address & 0xBFFFC000) == 0x00010000 || // Scratchpad
((address & 0x3F000000) >= 0x08000000 && (address & 0x3F000000) < 0x08000000 + g_MemorySize)) { // More RAM (remasters, etc.)
return GetPointerWriteUnchecked(address);
} else {
static bool reported = false;
if (!reported) {
Reporting::ReportMessage("Unknown GetPointerWrite %08x PC %08x LR %08x", address, currentMIPS->pc, currentMIPS->r[MIPS_REG_RA]);
reported = true;
}
// Size is not known, we pass 0 to signal that.
Core_MemoryException(address, 0, currentMIPS->pc, MemoryExceptionType::WRITE_BLOCK);
return nullptr;
}
}
const u8 *GetPointer(const u32 address) {
if ((address & 0x3E000000) == 0x08000000 || // RAM
(address & 0x3F800000) == 0x04000000 || // VRAM
(address & 0xBFFFC000) == 0x00010000 || // Scratchpad
((address & 0x3F000000) >= 0x08000000 && (address & 0x3F000000) < 0x08000000 + g_MemorySize)) { // More RAM (remasters, etc.)
return GetPointerUnchecked(address);
} else {
static bool reported = false;
if (!reported) {
Reporting::ReportMessage("Unknown GetPointer %08x PC %08x LR %08x", address, currentMIPS->pc, currentMIPS->r[MIPS_REG_RA]);
reported = true;
}
// Size is not known, we pass 0 to signal that.
Core_MemoryException(address, 0, currentMIPS->pc, MemoryExceptionType::READ_BLOCK);
return nullptr;
}
}
u8 *GetPointerWriteRange(const u32 address, const u32 size) {
u8 *ptr = GetPointerWrite(address);
if (ptr) {
if (ValidSize(address, size) != size) {
// That's a memory exception! TODO: Adjust reported address to the end of the range?
Core_MemoryException(address, size, currentMIPS->pc, MemoryExceptionType::WRITE_BLOCK);
return nullptr;
} else {
return ptr;
}
} else {
// Error was reported in GetPointerWrite already, if we're not ignoring errors.
return nullptr;
}
}
const u8 *GetPointerRange(const u32 address, const u32 size) {
const u8 *ptr = GetPointer(address);
if (ptr) {
if (ValidSize(address, size) != size) {
// That's a memory exception! TODO: Adjust reported address to the end of the range?
Core_MemoryException(address, size, currentMIPS->pc, MemoryExceptionType::READ_BLOCK);
return nullptr;
} else {
return ptr;
}
} else {
// Error was reported in GetPointer already, if we're not ignoring errors.
return nullptr;
}
}
template <typename T>
inline void ReadFromHardware(T &var, const u32 address) {
// TODO: Figure out the fastest order of tests for both read and write (they are probably different).
if ((address & 0x3E000000) == 0x08000000) {
// RAM
var = *((const T*)GetPointerUnchecked(address));
} else if ((address & 0x3F800000) == 0x04000000) {
// VRAM
var = *((const T*)GetPointerUnchecked(address));
} else if ((address & 0xBFFFC000) == 0x00010000) {
// Scratchpad
var = *((const T*)GetPointerUnchecked(address));
} else if ((address & 0x3F000000) >= 0x08000000 && (address & 0x3F000000) < 0x08000000 + g_MemorySize) {
// More RAM (remasters, etc.)
var = *((const T*)GetPointerUnchecked(address));
} else {
static bool reported = false;
if (!reported) {
Reporting::ReportMessage("ReadFromHardware: Invalid address %08x near PC %08x LR %08x", address, currentMIPS->pc, currentMIPS->r[MIPS_REG_RA]);
reported = true;
}
Core_MemoryException(address, sizeof(T), currentMIPS->pc, MemoryExceptionType::READ_WORD);
var = 0;
}
}
template <typename T>
inline void WriteToHardware(u32 address, const T data) {
if ((address & 0x3E000000) == 0x08000000) {
// RAM
*(T*)GetPointerUnchecked(address) = data;
} else if ((address & 0x3F800000) == 0x04000000) {
// VRAM
*(T*)GetPointerUnchecked(address) = data;
} else if ((address & 0xBFFFC000) == 0x00010000) {
// Scratchpad
*(T*)GetPointerUnchecked(address) = data;
} else if ((address & 0x3F000000) >= 0x08000000 && (address & 0x3F000000) < 0x08000000 + g_MemorySize) {
// More RAM (remasters, etc.)
*(T*)GetPointerUnchecked(address) = data;
} else {
static bool reported = false;
if (!reported) {
Reporting::ReportMessage("WriteToHardware: Invalid address %08x near PC %08x LR %08x", address, currentMIPS->pc, currentMIPS->r[MIPS_REG_RA]);
reported = true;
}
Core_MemoryException(address, sizeof(T), currentMIPS->pc, MemoryExceptionType::WRITE_WORD);
}
}
bool IsRAMAddress(const u32 address) {
if ((address & 0x3E000000) == 0x08000000) {
return true;
} else if ((address & 0x3F000000) >= 0x08000000 && (address & 0x3F000000) < 0x08000000 + g_MemorySize) {
return true;
} else {
return false;
}
}
bool IsScratchpadAddress(const u32 address) {
return (address & 0xBFFFC000) == 0x00010000;
}
u8 Read_U8(const u32 address) {
u8 value = 0;
ReadFromHardware<u8>(value, address);
return (u8)value;
}
u16 Read_U16(const u32 address) {
u16_le value = 0;
ReadFromHardware<u16_le>(value, address);
return (u16)value;
}
u32 Read_U32(const u32 address) {
u32_le value = 0;
ReadFromHardware<u32_le>(value, address);
return value;
}
u64 Read_U64(const u32 address) {
u64_le value = 0;
ReadFromHardware<u64_le>(value, address);
return value;
}
u32 Read_U8_ZX(const u32 address) {
return (u32)Read_U8(address);
}
u32 Read_U16_ZX(const u32 address) {
return (u32)Read_U16(address);
}
void Write_U8(const u8 _Data, const u32 address) {
WriteToHardware<u8>(address, _Data);
}
void Write_U16(const u16 _Data, const u32 address) {
WriteToHardware<u16_le>(address, _Data);
}
void Write_U32(const u32 _Data, const u32 address) {
WriteToHardware<u32_le>(address, _Data);
}
void Write_U64(const u64 _Data, const u32 address) {
WriteToHardware<u64_le>(address, _Data);
}
} // namespace Memory