114 lines
3.1 KiB
C++
114 lines
3.1 KiB
C++
// Copyright 2008 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#pragma once
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#include <memory>
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#include <string>
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#include "Common/CommonTypes.h"
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#include "Common/MathUtil.h"
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#include "Common/Swap.h"
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#include "Core/PowerPC/MMU.h"
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// Global declarations
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class PointerWrap;
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namespace MMIO
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{
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class Mapping;
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}
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namespace Memory
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{
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// Base is a pointer to the base of the memory map. Yes, some MMU tricks
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// are used to set up a full GC or Wii memory map in process memory. on
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// 32-bit, you have to mask your offsets with 0x3FFFFFFF. This means that
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// some things are mirrored too many times, but eh... it works.
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// In 64-bit, this might point to "high memory" (above the 32-bit limit),
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// so be sure to load it into a 64-bit register.
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extern u8* physical_base;
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extern u8* logical_base;
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// These are guaranteed to point to "low memory" addresses (sub-32-bit).
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extern u8* m_pRAM;
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extern u8* m_pEXRAM;
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extern u8* m_pL1Cache;
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extern u8* m_pFakeVMEM;
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enum
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{
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// RAM_SIZE is the amount allocated by the emulator, whereas REALRAM_SIZE is
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// what will be reported in lowmem, and thus used by emulated software.
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// Note: Writing to lowmem is done by IPL. If using retail IPL, it will
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// always be set to 24MB.
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REALRAM_SIZE = 0x01800000,
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RAM_SIZE = MathUtil::NextPowerOf2(REALRAM_SIZE),
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RAM_MASK = RAM_SIZE - 1,
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FAKEVMEM_SIZE = 0x02000000,
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FAKEVMEM_MASK = FAKEVMEM_SIZE - 1,
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L1_CACHE_SIZE = 0x00040000,
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L1_CACHE_MASK = L1_CACHE_SIZE - 1,
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IO_SIZE = 0x00010000,
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EXRAM_SIZE = 0x04000000,
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EXRAM_MASK = EXRAM_SIZE - 1,
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};
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// MMIO mapping object.
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extern std::unique_ptr<MMIO::Mapping> mmio_mapping;
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// Init and Shutdown
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bool IsInitialized();
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void Init();
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void Shutdown();
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void DoState(PointerWrap& p);
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void UpdateLogicalMemory(const PowerPC::BatTable& dbat_table);
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void Clear();
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// Routines to access physically addressed memory, designed for use by
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// emulated hardware outside the CPU. Use "Device_" prefix.
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std::string GetString(u32 em_address, size_t size = 0);
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u8* GetPointer(u32 address);
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void CopyFromEmu(void* data, u32 address, size_t size);
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void CopyToEmu(u32 address, const void* data, size_t size);
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void Memset(u32 address, u8 value, size_t size);
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u8 Read_U8(u32 address);
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u16 Read_U16(u32 address);
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u32 Read_U32(u32 address);
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u64 Read_U64(u32 address);
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void Write_U8(u8 var, u32 address);
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void Write_U16(u16 var, u32 address);
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void Write_U32(u32 var, u32 address);
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void Write_U64(u64 var, u32 address);
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void Write_U32_Swap(u32 var, u32 address);
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void Write_U64_Swap(u64 var, u32 address);
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// Templated functions for byteswapped copies.
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template <typename T>
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void CopyFromEmuSwapped(T* data, u32 address, size_t size)
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{
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const T* src = reinterpret_cast<T*>(GetPointer(address));
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if (src == nullptr)
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return;
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for (size_t i = 0; i < size / sizeof(T); i++)
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data[i] = Common::FromBigEndian(src[i]);
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}
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template <typename T>
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void CopyToEmuSwapped(u32 address, const T* data, size_t size)
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{
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T* dest = reinterpret_cast<T*>(GetPointer(address));
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if (dest == nullptr)
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return;
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for (size_t i = 0; i < size / sizeof(T); i++)
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dest[i] = Common::FromBigEndian(data[i]);
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}
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}
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