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https://github.com/ARMSX2/ARMSX2.git
synced 2026-08-24 16:50:16 -07:00
Ziemas
e47b32b2e6
There doesn't seem to be any particular reason to not combine them into one, less sketchy than accessing the extra array by going past the end of the main one too.
72 lines
2.5 KiB
C++
72 lines
2.5 KiB
C++
// SPDX-FileCopyrightText: 2002-2026 PCSX2 Dev Team
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// SPDX-License-Identifier: GPL-3.0+
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#pragma once
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#include "common/Pcsx2Defs.h"
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namespace Ps2MemSize
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{
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static constexpr u32 MainRam = _32mb; // 32 MB main memory.
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static constexpr u32 ExtraRam = _1mb * 96; // 32+96 MB devkit memory.
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static constexpr u32 TotalRam = _1mb * 128;// 128 MB total memory.
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static constexpr u32 Rom = _1mb * 4; // 4 MB main rom
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static constexpr u32 Rom1 = _1mb * 4; // DVD player
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static constexpr u32 Rom2 = _1mb * 4; // Chinese rom extension
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static constexpr u32 Hardware = _64kb;
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static constexpr u32 Scratch = _16kb;
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static constexpr u32 IopRam = _1mb * 2; // 2MB main ram on the IOP.
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static constexpr u32 ExtraIopRam = _1mb * 6; // 2MB main ram on the IOP.
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static constexpr u32 TotalIopRam = _8mb; // 2MB main ram on the IOP.
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static constexpr u32 IopHardware = _64kb;
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static constexpr u32 GSregs = 0x00002000; // 8k for the GS registers and stuff.
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extern u32 ExposedRam;
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extern u32 ExposedIopRam;
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} // namespace Ps2MemSize
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typedef u8 mem8_t;
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typedef u16 mem16_t;
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typedef u32 mem32_t;
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typedef u64 mem64_t;
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typedef u128 mem128_t;
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// Needs to fit within EEmemSize of Memory.h
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struct EEVM_MemoryAllocMess
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{
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u8 Main[Ps2MemSize::TotalRam]; // Main memory
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u8 Scratch[Ps2MemSize::Scratch]; // Scratchpad!
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u8 ROM[Ps2MemSize::Rom]; // Boot rom (4MB)
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u8 ROM1[Ps2MemSize::Rom1]; // DVD player (4MB)
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u8 ROM2[Ps2MemSize::Rom2]; // Chinese extensions
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// Two 1 megabyte (max DMA) buffers for reading and writing to high memory (>32MB).
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// Such accesses are not documented as causing bus errors but as the memory does
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// not exist, reads should continue to return 0 and writes should be discarded.
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// Probably.
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u8 ZeroRead[_1mb];
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u8 ZeroWrite[_1mb];
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};
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// Needs to fit within IOPmemSize of Memory.h
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struct IopVM_MemoryAllocMess
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{
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u8 Main[Ps2MemSize::TotalRam]; // Main memory
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u8 P[_64kb]; // I really have no idea what this is... --air
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u8 Sif[0x100]; // a few special SIF/SBUS registers (likely not needed)
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};
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// DevNote: EE and IOP hardware registers are done as a static array instead of a pointer in
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// order to allow for simpler macros and reference handles to be defined (we can safely use
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// compile-time references to registers instead of having to use instance variables).
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alignas(__pagealignsize) extern u8 eeHw[Ps2MemSize::Hardware];
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alignas(__pagealignsize) extern u8 iopHw[Ps2MemSize::IopHardware];
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extern EEVM_MemoryAllocMess* eeMem;
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extern IopVM_MemoryAllocMess* iopMem;
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