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https://github.com/RetroDECK/Duckstation.git
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91 lines
2.9 KiB
C++
91 lines
2.9 KiB
C++
// SPDX-FileCopyrightText: 2019-2022 Connor McLaughlin <stenzek@gmail.com>.
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// SPDX-License-Identifier: (GPL-3.0 OR CC-BY-NC-ND-4.0)
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#pragma once
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#include "types.h"
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#include <optional>
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#include <string>
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#include <string_view>
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#include <vector>
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namespace BIOS {
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enum : u32
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{
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BIOS_BASE = 0x1FC00000,
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BIOS_SIZE = 0x80000,
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BIOS_SIZE_PS2 = 0x400000,
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BIOS_SIZE_PS3 = 0x3E66F0
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};
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using Image = std::vector<u8>;
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struct Hash
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{
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u8 bytes[16];
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ALWAYS_INLINE bool operator==(const Hash& bh) const { return (std::memcmp(bytes, bh.bytes, sizeof(bytes)) == 0); }
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ALWAYS_INLINE bool operator!=(const Hash& bh) const { return (std::memcmp(bytes, bh.bytes, sizeof(bytes)) != 0); }
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std::string ToString() const;
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};
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struct ImageInfo
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{
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const char* description;
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ConsoleRegion region;
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Hash hash;
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bool patch_compatible;
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};
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#pragma pack(push, 1)
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struct PSEXEHeader
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{
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char id[8]; // 0x000-0x007 PS-X EXE
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char pad1[8]; // 0x008-0x00F
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u32 initial_pc; // 0x010
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u32 initial_gp; // 0x014
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u32 load_address; // 0x018
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u32 file_size; // 0x01C excluding 0x800-byte header
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u32 unk0; // 0x020
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u32 unk1; // 0x024
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u32 memfill_start; // 0x028
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u32 memfill_size; // 0x02C
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u32 initial_sp_base; // 0x030
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u32 initial_sp_offset; // 0x034
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u32 reserved[5]; // 0x038-0x04B
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char marker[0x7B4]; // 0x04C-0x7FF
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};
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static_assert(sizeof(PSEXEHeader) == 0x800);
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#pragma pack(pop)
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std::optional<Image> LoadImageFromFile(const char* filename);
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Hash GetImageHash(const Image& image);
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const ImageInfo* GetInfoForImage(const Image& image);
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const ImageInfo* GetInfoForImage(const Image& image, const Hash& hash);
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bool IsValidBIOSForRegion(ConsoleRegion console_region, ConsoleRegion bios_region);
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void PatchBIOS(u8* image, u32 image_size, u32 address, u32 value, u32 mask = UINT32_C(0xFFFFFFFF));
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bool PatchBIOSFastBoot(u8* image, u32 image_size);
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bool PatchBIOSForEXE(u8* image, u32 image_size, u32 r_pc, u32 r_gp, u32 r_sp, u32 r_fp);
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bool IsValidPSExeHeader(const PSEXEHeader& header, u32 file_size);
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DiscRegion GetPSExeDiscRegion(const PSEXEHeader& header);
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/// Loads the BIOS image for the specified region.
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std::optional<std::vector<u8>> GetBIOSImage(ConsoleRegion region);
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/// Searches for a BIOS image for the specified region in the specified directory. If no match is found, the first
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/// BIOS image within 512KB and 4MB will be used.
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std::optional<std::vector<u8>> FindBIOSImageInDirectory(ConsoleRegion region, const char* directory);
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/// Returns a BIOS image which matches the specified hash.
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std::string FindBIOSPathWithHash(const char* directory, const BIOS::Hash& hash);
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/// Returns a list of filenames and descriptions for BIOS images in a directory.
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std::vector<std::pair<std::string, const BIOS::ImageInfo*>> FindBIOSImagesInDirectory(const char* directory);
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/// Returns true if any BIOS images are found in the configured BIOS directory.
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bool HasAnyBIOSImages();
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} // namespace BIOS
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