mirror of
https://github.com/hrydgard/ppsspp.git
synced 2024-11-23 21:39:52 +00:00
388 lines
9.4 KiB
C++
388 lines
9.4 KiB
C++
// Copyright (C) 2003 Dolphin Project / 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 SVN repository and contact information can be found at
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// http://code.google.com/p/dolphin-emu/
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#ifndef _MEMMAP_H
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#define _MEMMAP_H
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// Includes
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#include <string>
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#include "Common.h"
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#include "CommonTypes.h"
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#include "HDRemaster.h"
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// PPSSPP is very aggressive about trying to do memory accesses directly, for speed.
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// This can be a problem when debugging though, as stray memory reads and writes will
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// crash the whole emulator.
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// If safe memory is enabled and JIT is disabled, all memory access will go through the proper
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// memory access functions, and thus won't crash the emu when they go out of bounds.
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#if defined(_DEBUG)
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//#define SAFE_MEMORY
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#endif
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// Global declarations
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class PointerWrap;
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typedef void (*writeFn8 )(const u8, const u32);
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typedef void (*writeFn16)(const u16,const u32);
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typedef void (*writeFn32)(const u32,const u32);
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typedef void (*writeFn64)(const u64,const u32);
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typedef void (*readFn8 )(u8&, const u32);
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typedef void (*readFn16)(u16&, const u32);
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typedef void (*readFn32)(u32&, const u32);
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typedef void (*readFn64)(u64&, const u32);
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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 *base;
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// These are guaranteed to point to "low memory" addresses (sub-32-bit).
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// 64-bit: Pointers to low-mem (sub-0x10000000) mirror
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// 32-bit: Same as the corresponding physical/virtual pointers.
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extern u8 *m_pRAM;
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extern u8 *m_pScratchPad;
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extern u8 *m_pVRAM;
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// 64-bit: Pointers to high-mem mirrors
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// 32-bit: Same as above
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extern u8 *m_pPhysicalRAM;
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extern u8 *m_pUncachedRAM;
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extern u8 *m_pPhysicalVRAM;
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extern u8 *m_pUncachedVRAM;
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// These replace RAM_SIZE and RAM_MASK, respectively.
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extern u32 g_MemorySize;
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extern u32 g_MemoryMask;
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enum
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{
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VRAM_SIZE = 0x200000,
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VRAM_MASK = VRAM_SIZE - 1,
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SCRATCHPAD_SIZE = 0x4000,
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SCRATCHPAD_MASK = SCRATCHPAD_SIZE - 1,
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#if defined(_M_IX86) || defined(_M_ARM32)
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// This wraparound should work for PSP too.
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MEMVIEW32_MASK = 0x3FFFFFFF,
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#endif
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};
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// Init and Shutdown
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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 Clear();
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// used by JIT to read instructions
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u32 Read_Opcode_JIT(const u32 _Address);
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// used by JIT. uses iCacheJIT. Reads in the "Locked cache" mode
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void Write_Opcode_JIT(const u32 _Address, const u32 _Value);
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// this is used by Debugger a lot.
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// For now, just reads from memory!
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u32 Read_Instruction(const u32 _Address);
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// For use by emulator
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u8 Read_U8(const u32 _Address);
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u16 Read_U16(const u32 _Address);
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u32 Read_U32(const u32 _Address);
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u64 Read_U64(const u32 _Address);
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#if (defined(ARM) || defined(_ARM)) && !defined(_M_ARM)
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#define _M_ARM
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#endif
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#ifdef SAFE_MEMORY
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u32 ReadUnchecked_U32(const u32 _Address);
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// ONLY for use by GUI and fast interpreter
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u8 ReadUnchecked_U8(const u32 _Address);
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u16 ReadUnchecked_U16(const u32 _Address);
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void WriteUnchecked_U8(const u8 _Data, const u32 _Address);
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void WriteUnchecked_U16(const u16 _Data, const u32 _Address);
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void WriteUnchecked_U32(const u32 _Data, const u32 _Address);
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#else
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inline u32 ReadUnchecked_U32(const u32 address) {
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#if defined(_M_IX86) || defined(_M_ARM32)
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return (*(u32 *)(base + (address & MEMVIEW32_MASK)));
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#else
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return (*(u32 *)(base + address));
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#endif
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}
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inline u16 ReadUnchecked_U16(const u32 address) {
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#if defined(_M_IX86) || defined(_M_ARM32)
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return (*(u16 *)(base + (address & MEMVIEW32_MASK)));
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#else
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return (*(u16 *)(base + address));
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#endif
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}
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inline u8 ReadUnchecked_U8(const u32 address) {
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#if defined(_M_IX86) || defined(_M_ARM32)
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return (*(u8 *)(base + (address & MEMVIEW32_MASK)));
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#else
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return (*(u8 *)(base + address));
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#endif
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}
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inline void WriteUnchecked_U32(u32 data, u32 address) {
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#if defined(_M_IX86) || defined(_M_ARM32)
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(*(u32 *)(base + (address & MEMVIEW32_MASK))) = data;
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#else
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(*(u32 *)(base + address)) = data;
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#endif
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}
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inline void WriteUnchecked_U16(u16 data, u32 address) {
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#if defined(_M_IX86) || defined(_M_ARM32)
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(*(u16 *)(base + (address & MEMVIEW32_MASK))) = data;
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#else
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(*(u16 *)(base + address)) = data;
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#endif
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}
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inline void WriteUnchecked_U8(u8 data, u32 address) {
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#if defined(_M_IX86) || defined(_M_ARM32)
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(*(u8 *)(base + (address & MEMVIEW32_MASK))) = data;
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#else
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(*(u8 *)(base + address)) = data;
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#endif
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}
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#endif
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inline float Read_Float(u32 address)
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{
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u32 ifloat = Read_U32(address);
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float f;
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memcpy(&f, &ifloat, sizeof(float));
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return f;
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}
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// used by JIT. Return zero-extended 32bit values
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u32 Read_U8_ZX(const u32 address);
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u32 Read_U16_ZX(const u32 address);
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void Write_U8(const u8 data, const u32 address);
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void Write_U16(const u16 data, const u32 address);
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void Write_U32(const u32 data, const u32 address);
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void Write_U64(const u64 data, const u32 address);
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inline void Write_Float(float f, u32 address)
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{
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u32 u;
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memcpy(&u, &f, sizeof(float));
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Write_U32(u, address);
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}
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// Reads a zero-terminated string from memory at the address.
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void GetString(std::string& _string, const u32 _Address);
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u8* GetPointer(const u32 address);
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bool IsValidAddress(const u32 address);
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inline const char* GetCharPointer(const u32 address) {
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return (const char *)GetPointer(address);
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}
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void Memset(const u32 _Address, const u8 _Data, const u32 _iLength);
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void Memcpy(const u32 to_address, const void *from_data, const u32 len);
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void Memcpy(void *to_data, const u32 from_address, const u32 len);
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template<class T>
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void ReadStruct(u32 address, T *ptr)
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{
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size_t sz = sizeof(*ptr);
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memcpy(ptr, GetPointer(address), sz);
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}
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template<class T>
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void WriteStruct(u32 address, T *ptr)
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{
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size_t sz = sizeof(*ptr);
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memcpy(GetPointer(address), ptr, sz);
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}
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// Expect this to be some form of auto class on big endian.
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template<class T>
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T *GetStruct(u32 address)
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{
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return (T *)GetPointer(address);
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}
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const char *GetAddressName(u32 address);
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};
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template <typename T>
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struct PSPPointer
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{
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u32_le ptr;
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inline T &operator*() const
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{
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return *(T *)(Memory::base + ptr);
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}
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inline T &operator[](int i) const
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{
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return *((T *)(Memory::base + ptr) + i);
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}
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inline T *operator->() const
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{
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return (T *)(Memory::base + ptr);
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}
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inline PSPPointer<T> operator+(int i) const
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{
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PSPPointer other;
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other.ptr = ptr + i * sizeof(T);
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return other;
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}
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inline PSPPointer<T> &operator=(u32 p)
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{
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ptr = p;
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return *this;
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}
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inline PSPPointer<T> &operator+=(int i)
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{
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ptr = ptr + i * sizeof(T);
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return *this;
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}
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inline PSPPointer<T> operator-(int i) const
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{
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PSPPointer other;
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other.ptr = ptr - i * sizeof(T);
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return other;
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}
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inline PSPPointer<T> &operator-=(int i)
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{
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ptr = ptr - i * sizeof(T);
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return *this;
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}
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inline PSPPointer<T> &operator++()
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{
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ptr += sizeof(T);
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return *this;
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}
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inline PSPPointer<T> operator++(int i)
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{
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PSPPointer<T> other;
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other.ptr = ptr;
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ptr += sizeof(T);
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return other;
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}
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inline PSPPointer<T> &operator--()
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{
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ptr -= sizeof(T);
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return *this;
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}
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inline PSPPointer<T> operator--(int i)
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{
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PSPPointer<T> other;
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other.ptr = ptr;
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ptr -= sizeof(T);
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return other;
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}
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inline operator T*()
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{
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return (T *)(Memory::base + ptr);
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}
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bool IsValid() const
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{
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return Memory::IsValidAddress(ptr);
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}
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};
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inline u32 PSP_GetScratchpadMemoryBase() { return 0x00010000;}
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inline u32 PSP_GetScratchpadMemoryEnd() { return 0x00014000;}
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inline u32 PSP_GetKernelMemoryBase() { return 0x08000000;}
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inline u32 PSP_GetUserMemoryEnd() { return PSP_GetKernelMemoryBase() + Memory::g_MemorySize;}
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inline u32 PSP_GetKernelMemoryEnd() { return 0x08400000;}
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// "Volatile" RAM is between 0x08400000 and 0x08800000, can be requested by the
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// game through sceKernelVolatileMemTryLock.
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inline u32 PSP_GetUserMemoryBase() { return 0x08800000;}
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inline u32 PSP_GetDefaultLoadAddress() { return 0x08804000;}
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//inline u32 PSP_GetDefaultLoadAddress() { return 0x0898dab0;}
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inline u32 PSP_GetVidMemBase() { return 0x04000000;}
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inline u32 PSP_GetVidMemEnd() { return 0x04800000;}
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template <typename T>
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inline bool operator==(const PSPPointer<T> &lhs, const PSPPointer<T> &rhs)
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{
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return lhs.ptr == rhs.ptr;
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}
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template <typename T>
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inline bool operator!=(const PSPPointer<T> &lhs, const PSPPointer<T> &rhs)
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{
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return lhs.ptr != rhs.ptr;
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}
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template <typename T>
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inline bool operator<(const PSPPointer<T> &lhs, const PSPPointer<T> &rhs)
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{
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return lhs.ptr < rhs.ptr;
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}
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template <typename T>
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inline bool operator>(const PSPPointer<T> &lhs, const PSPPointer<T> &rhs)
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{
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return lhs.ptr > rhs.ptr;
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}
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template <typename T>
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inline bool operator<=(const PSPPointer<T> &lhs, const PSPPointer<T> &rhs)
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{
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return lhs.ptr <= rhs.ptr;
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}
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template <typename T>
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inline bool operator>=(const PSPPointer<T> &lhs, const PSPPointer<T> &rhs)
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{
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return lhs.ptr >= rhs.ptr;
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}
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#endif
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