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134397754e
These lookup tables total 4 megabytes, and contain data that's entirely redundant to the actual cache state (as part of an optimization, though I'm not sure whether the optimization actually is useful). This change instead recomputes these lookup tables when loading the state (which involves filling the lookup table with a marker (0xff), and then setting the 128 * 8 valid entries (1 kilobyte)).
49 lines
1.3 KiB
C++
49 lines
1.3 KiB
C++
// Copyright 2008 Dolphin Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#pragma once
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#include <array>
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#include <optional>
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#include "Common/CommonTypes.h"
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class PointerWrap;
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namespace PowerPC
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{
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constexpr u32 ICACHE_SETS = 128;
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constexpr u32 ICACHE_WAYS = 8;
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// size of an instruction cache block in words
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constexpr u32 ICACHE_BLOCK_SIZE = 8;
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constexpr u32 ICACHE_EXRAM_BIT = 0x10000000;
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constexpr u32 ICACHE_VMEM_BIT = 0x20000000;
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struct InstructionCache
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{
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std::array<std::array<std::array<u32, ICACHE_BLOCK_SIZE>, ICACHE_WAYS>, ICACHE_SETS> data{};
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std::array<std::array<u32, ICACHE_WAYS>, ICACHE_SETS> tags{};
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std::array<u32, ICACHE_SETS> plru{};
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std::array<u32, ICACHE_SETS> valid{};
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// Note: This is only for performance purposes; this same data could be computed at runtime
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// from the tags and valid fields (and that's how it's done on the actual cache)
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std::array<u8, 1 << 20> lookup_table{};
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std::array<u8, 1 << 21> lookup_table_ex{};
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std::array<u8, 1 << 20> lookup_table_vmem{};
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bool m_disable_icache = false;
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std::optional<size_t> m_config_callback_id = std::nullopt;
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InstructionCache() = default;
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~InstructionCache();
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u32 ReadInstruction(u32 addr);
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void Invalidate(u32 addr);
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void Init();
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void Reset();
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void DoState(PointerWrap& p);
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void RefreshConfig();
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};
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} // namespace PowerPC
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