89 lines
2.3 KiB
C++
89 lines
2.3 KiB
C++
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#include "stdafx.h"
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#include "PifRamHandler.h"
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#include <Project64-core\N64System\Mips\MemoryVirtualMem.h>
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#include <Project64-core\N64System\SystemGlobals.h>
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PifRamHandler::PifRamHandler(CMipsMemoryVM & MMU, CRegisters & Reg) :
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m_MMU(MMU),
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m_PifRam(MMU.PifRam()),
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m_PC(Reg.m_PROGRAM_COUNTER)
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{
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}
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bool PifRamHandler::Read32(uint32_t Address, uint32_t & Value)
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{
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Address &= 0x1FFFFFFF;
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if (Address < 0x1FC007C0)
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{
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//Value = swap32by8(*(uint32_t *)(&PifRom[PAddr - 0x1FC00000]));
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Value = 0;
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if (HaveDebugger())
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{
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g_Notify->BreakPoint(__FILE__, __LINE__);
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}
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}
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else if (Address < 0x1FC00800)
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{
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Value = *(uint32_t *)(&m_PifRam[Address - 0x1FC007C0]);
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Value = swap32by8(Value);
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}
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else
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{
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Value = 0;
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if (HaveDebugger())
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{
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g_Notify->BreakPoint(__FILE__, __LINE__);
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}
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}
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if (GenerateLog() && LogPRDirectMemLoads() && Address >= 0x1FC007C0 && Address <= 0x1FC007FC)
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{
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LogMessage("%08X: read word from PIF RAM at 0x%X (%08X)", m_PC, Address - 0x1FC007C0, Value);
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}
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return true;
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}
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bool PifRamHandler::Write32(uint32_t Address, uint32_t Value, uint32_t Mask)
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{
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Address &= 0x1FFFFFFF;
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if (GenerateLog() && LogPRDirectMemStores() && Address >= 0x1FC007C0 && Address <= 0x1FC007FC)
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{
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LogMessage("%08X: Writing 0x%08X to PIF RAM at 0x%X", m_PC, Value, Address - 0x1FC007C0);
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}
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if (Address < 0x1FC007C0)
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{
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if (HaveDebugger())
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{
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g_Notify->BreakPoint(__FILE__, __LINE__);
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}
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}
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else if (Address < 0x1FC00800)
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{
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uint32_t SwappedMask = swap32by8(Mask);
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Value = ((*(uint32_t *)(&m_PifRam[Address - 0x1FC007C0])) & ~SwappedMask) | (Value & SwappedMask);
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*(uint32_t *)(&m_PifRam[Address - 0x1FC007C0]) = Value;
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if (Address == 0x1FC007FC)
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{
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m_MMU.PifRamWrite();
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}
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}
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return true;
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}
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uint32_t PifRamHandler::swap32by8(uint32_t word)
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{
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const uint32_t swapped =
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#if defined(_MSC_VER)
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_byteswap_ulong(word)
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#elif defined(__GNUC__)
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__builtin_bswap32(word)
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#else
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(word & 0x000000FFul) << 24
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| (word & 0x0000FF00ul) << 8
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| (word & 0x00FF0000ul) >> 8
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| (word & 0xFF000000ul) >> 24
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#endif
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;
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return (swapped & 0xFFFFFFFFul);
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}
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