77 lines
1.8 KiB
C++
77 lines
1.8 KiB
C++
/*
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* gdcartridge.h
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*
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* Created on: Nov 16, 2018
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* Author: flyinghead
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*
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* From mame naomigd.h
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* // license:BSD-3-Clause
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* // copyright-holders:Olivier Galibert
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*
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*/
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#ifndef CORE_HW_NAOMI_GDCARTRIDGE_H_
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#define CORE_HW_NAOMI_GDCARTRIDGE_H_
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#include "naomi_cart.h"
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#include "imgread/common.h"
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class GDCartridge: public NaomiCartridge {
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public:
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GDCartridge(u32 size) : NaomiCartridge(size)
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{
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}
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~GDCartridge() override
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{
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free(dimm_data);
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}
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void Init() override
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{
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device_start();
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device_reset();
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}
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void* GetDmaPtr(u32 &size) override;
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void AdvancePtr(u32 size) override;
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bool Read(u32 offset, u32 size, void* dst) override;
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std::string GetGameId() override;
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void SetGDRomName(const char *name, const char *parentName) { this->gdrom_name = name; this->gdrom_parent_name = parentName; }
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private:
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enum { FILENAME_LENGTH=24 };
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const char *gdrom_name = nullptr;
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const char *gdrom_parent_name = nullptr;
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u32 dimm_cur_address = 0;
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u8 *dimm_data = nullptr;
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u32 dimm_data_size = 0;
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static const u32 DES_LEFTSWAP[];
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static const u32 DES_RIGHTSWAP[];
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static const u32 DES_SBOX1[];
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static const u32 DES_SBOX2[];
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static const u32 DES_SBOX3[];
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static const u32 DES_SBOX4[];
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static const u32 DES_SBOX5[];
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static const u32 DES_SBOX6[];
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static const u32 DES_SBOX7[];
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static const u32 DES_SBOX8[];
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static const u32 DES_MASK_TABLE[];
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static const u8 DES_ROTATE_TABLE[16];
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void device_start();
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void device_reset();
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void find_file(const char *name, const u8 *dir_sector, u32 &file_start, u32 &file_size);
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inline void permutate(u32 &a, u32 &b, u32 m, int shift);
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void des_generate_subkeys(u64 key, u32 *subkeys);
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template<bool decrypt>
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u64 des_encrypt_decrypt(u64 src, const u32 *des_subkeys);
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u64 rev64(u64 src);
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void read_gdrom(Disc *gdrom, u32 sector, u8* dst, u32 count = 1);
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};
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#endif /* CORE_HW_NAOMI_GDCARTRIDGE_H_ */
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