PowerPC: Move MMU-specifics from PowerPC.h to MMU.h

PowerPC.h at this point is pretty much a general glob of stuff, and it's
unfortunate, since it means pulling in a lot of unrelated header
dependencies and a bunch of other things that don't need to be seen by
things that just want to read memory.

Breaking this out into its own header keeps all the MMU-related stuff
together and also limits the amount of header dependencies being
included (the primary motivation for this being the former reason).

Source/Core/Core/PowerPC/PowerPC.h

@@ -210,112 +210,6 @@ void UpdatePerformanceMonitor(u32 cycles, u32 num_load_stores, u32 num_fp_inst);
 #define riPS0(i) (*(u64*)(&PowerPC::ppcState.ps[i][0]))
 #define riPS1(i) (*(u64*)(&PowerPC::ppcState.ps[i][1]))
 
-// Routines for debugger UI, cheats, etc. to access emulated memory from the
-// perspective of the CPU.  Not for use by core emulation routines.
-// Use "Host_" prefix.
-u8 HostRead_U8(u32 address);
-u16 HostRead_U16(u32 address);
-u32 HostRead_U32(u32 address);
-u64 HostRead_U64(u32 address);
-float HostRead_F32(u32 address);
-double HostRead_F64(u32 address);
-u32 HostRead_Instruction(u32 address);
-
-void HostWrite_U8(u8 var, u32 address);
-void HostWrite_U16(u16 var, u32 address);
-void HostWrite_U32(u32 var, u32 address);
-void HostWrite_U64(u64 var, u32 address);
-void HostWrite_F32(float var, u32 address);
-void HostWrite_F64(double var, u32 address);
-
-// Returns whether a read or write to the given address will resolve to a RAM
-// access given the current CPU state.
-bool HostIsRAMAddress(u32 address);
-// Same as HostIsRAMAddress, but uses IBAT instead of DBAT.
-bool HostIsInstructionRAMAddress(u32 address);
-
-std::string HostGetString(u32 em_address, size_t size = 0);
-
-// Routines for the CPU core to access memory.
-
-// Used by interpreter to read instructions, uses iCache
-u32 Read_Opcode(u32 address);
-struct TryReadInstResult
-{
-  bool valid;
-  bool from_bat;
-  u32 hex;
-  u32 physical_address;
-};
-TryReadInstResult TryReadInstruction(u32 address);
-
-u8 Read_U8(u32 address);
-u16 Read_U16(u32 address);
-u32 Read_U32(u32 address);
-u64 Read_U64(u32 address);
-
-// Useful helper functions, used by ARM JIT
-float Read_F32(u32 address);
-double Read_F64(u32 address);
-
-// used by JIT. Return zero-extended 32bit values
-u32 Read_U8_ZX(u32 address);
-u32 Read_U16_ZX(u32 address);
-
-void Write_U8(u8 var, u32 address);
-void Write_U16(u16 var, u32 address);
-void Write_U32(u32 var, u32 address);
-void Write_U64(u64 var, u32 address);
-
-void Write_U16_Swap(u16 var, u32 address);
-void Write_U32_Swap(u32 var, u32 address);
-void Write_U64_Swap(u64 var, u32 address);
-
-// Useful helper functions, used by ARM JIT
-void Write_F64(double var, u32 address);
-
-void DMA_LCToMemory(u32 memAddr, u32 cacheAddr, u32 numBlocks);
-void DMA_MemoryToLC(u32 cacheAddr, u32 memAddr, u32 numBlocks);
-void ClearCacheLine(u32 address);  // Zeroes 32 bytes; address should be 32-byte-aligned
-
-// TLB functions
-void SDRUpdated();
-void InvalidateTLBEntry(u32 address);
-void DBATUpdated();
-void IBATUpdated();
-
-// Result changes based on the BAT registers and MSR.DR.  Returns whether
-// it's safe to optimize a read or write to this address to an unguarded
-// memory access.  Does not consider page tables.
-bool IsOptimizableRAMAddress(u32 address);
-u32 IsOptimizableMMIOAccess(u32 address, u32 accessSize);
-bool IsOptimizableGatherPipeWrite(u32 address);
-
-struct TranslateResult
-{
-  bool valid;
-  bool from_bat;
-  u32 address;
-};
-TranslateResult JitCache_TranslateAddress(u32 address);
-
-constexpr int BAT_INDEX_SHIFT = 17;
-constexpr u32 BAT_PAGE_SIZE = 1 << BAT_INDEX_SHIFT;
-constexpr u32 BAT_MAPPED_BIT = 0x1;
-constexpr u32 BAT_PHYSICAL_BIT = 0x2;
-constexpr u32 BAT_RESULT_MASK = UINT32_C(~0x3);
-using BatTable = std::array<u32, 1 << (32 - BAT_INDEX_SHIFT)>;  // 128 KB
-extern BatTable ibat_table;
-extern BatTable dbat_table;
-inline bool TranslateBatAddess(const BatTable& bat_table, u32* address)
-{
-  u32 bat_result = bat_table[*address >> BAT_INDEX_SHIFT];
-  if ((bat_result & BAT_MAPPED_BIT) == 0)
-    return false;
-  *address = (bat_result & BAT_RESULT_MASK) | (*address & (BAT_PAGE_SIZE - 1));
-  return true;
-}
-
 enum CRBits
 {
   CR_SO = 1,